WebView.java revision d6982c9bb46511a5d86458b2dddde0a40e2f4f75
1/* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.webkit; 18 19import android.app.AlertDialog; 20import android.content.Context; 21import android.content.DialogInterface; 22import android.content.Intent; 23import android.content.DialogInterface.OnCancelListener; 24import android.database.DataSetObserver; 25import android.graphics.Bitmap; 26import android.graphics.Canvas; 27import android.graphics.Color; 28import android.graphics.Paint; 29import android.graphics.Path; 30import android.graphics.Picture; 31import android.graphics.Point; 32import android.graphics.Rect; 33import android.graphics.Region; 34import android.net.http.SslCertificate; 35import android.net.Uri; 36import android.os.Bundle; 37import android.os.Handler; 38import android.os.Message; 39import android.os.ServiceManager; 40import android.os.SystemClock; 41import android.provider.Checkin; 42import android.text.IClipboard; 43import android.text.Selection; 44import android.text.Spannable; 45import android.util.AttributeSet; 46import android.util.EventLog; 47import android.util.Log; 48import android.view.Gravity; 49import android.view.KeyEvent; 50import android.view.LayoutInflater; 51import android.view.MotionEvent; 52import android.view.SoundEffectConstants; 53import android.view.VelocityTracker; 54import android.view.View; 55import android.view.ViewConfiguration; 56import android.view.ViewGroup; 57import android.view.ViewParent; 58import android.view.ViewTreeObserver; 59import android.view.animation.AlphaAnimation; 60import android.view.inputmethod.InputMethodManager; 61import android.webkit.TextDialog.AutoCompleteAdapter; 62import android.webkit.WebViewCore.EventHub; 63import android.widget.AbsoluteLayout; 64import android.widget.Adapter; 65import android.widget.AdapterView; 66import android.widget.ArrayAdapter; 67import android.widget.FrameLayout; 68import android.widget.ImageView; 69import android.widget.ListView; 70import android.widget.Scroller; 71import android.widget.Toast; 72import android.widget.ZoomButtonsController; 73import android.widget.ZoomControls; 74import android.widget.AdapterView.OnItemClickListener; 75 76import java.io.File; 77import java.io.FileInputStream; 78import java.io.FileNotFoundException; 79import java.io.FileOutputStream; 80import java.io.IOException; 81import java.net.URLDecoder; 82import java.util.ArrayList; 83import java.util.HashMap; 84import java.util.List; 85 86/** 87 * <p>A View that displays web pages. This class is the basis upon which you 88 * can roll your own web browser or simply display some online content within your Activity. 89 * It uses the WebKit rendering engine to display 90 * web pages and includes methods to navigate forward and backward 91 * through a history, zoom in and out, perform text searches and more.</p> 92 * <p>To enable the built-in zoom, set 93 * {@link #getSettings() WebSettings}.{@link WebSettings#setBuiltInZoomControls(boolean)} 94 * (introduced in API version 3). 95 * <p>Note that, in order for your Activity to access the Internet and load web pages 96 * in a WebView, you must add the <var>INTERNET</var> permissions to your 97 * Android Manifest file:</p> 98 * <pre><uses-permission android:name="android.permission.INTERNET" /></pre> 99 * 100 * <p>This must be a child of the <code><manifest></code> element.</p> 101 * 102 * <h3>Basic usage</h3> 103 * 104 * <p>By default, a WebView provides no browser-like widgets, does not 105 * enable JavaScript and errors will be ignored. If your goal is only 106 * to display some HTML as a part of your UI, this is probably fine; 107 * the user won't need to interact with the web page beyond reading 108 * it, and the web page won't need to interact with the user. If you 109 * actually want a fully blown web browser, then you probably want to 110 * invoke the Browser application with your URL rather than show it 111 * with a WebView. See {@link android.content.Intent} for more information.</p> 112 * 113 * <pre class="prettyprint"> 114 * WebView webview = new WebView(this); 115 * setContentView(webview); 116 * 117 * // Simplest usage: note that an exception will NOT be thrown 118 * // if there is an error loading this page (see below). 119 * webview.loadUrl("http://slashdot.org/"); 120 * 121 * // Of course you can also load from any string: 122 * String summary = "<html><body>You scored <b>192</b> points.</body></html>"; 123 * webview.loadData(summary, "text/html", "utf-8"); 124 * // ... although note that there are restrictions on what this HTML can do. 125 * // See the JavaDocs for loadData and loadDataWithBaseUrl for more info. 126 * </pre> 127 * 128 * <p>A WebView has several customization points where you can add your 129 * own behavior. These are:</p> 130 * 131 * <ul> 132 * <li>Creating and setting a {@link android.webkit.WebChromeClient} subclass. 133 * This class is called when something that might impact a 134 * browser UI happens, for instance, progress updates and 135 * JavaScript alerts are sent here. 136 * </li> 137 * <li>Creating and setting a {@link android.webkit.WebViewClient} subclass. 138 * It will be called when things happen that impact the 139 * rendering of the content, eg, errors or form submissions. You 140 * can also intercept URL loading here.</li> 141 * <li>Via the {@link android.webkit.WebSettings} class, which contains 142 * miscellaneous configuration. </li> 143 * <li>With the {@link android.webkit.WebView#addJavascriptInterface} method. 144 * This lets you bind Java objects into the WebView so they can be 145 * controlled from the web pages JavaScript.</li> 146 * </ul> 147 * 148 * <p>Here's a more complicated example, showing error handling, 149 * settings, and progress notification:</p> 150 * 151 * <pre class="prettyprint"> 152 * // Let's display the progress in the activity title bar, like the 153 * // browser app does. 154 * getWindow().requestFeature(Window.FEATURE_PROGRESS); 155 * 156 * webview.getSettings().setJavaScriptEnabled(true); 157 * 158 * final Activity activity = this; 159 * webview.setWebChromeClient(new WebChromeClient() { 160 * public void onProgressChanged(WebView view, int progress) { 161 * // Activities and WebViews measure progress with different scales. 162 * // The progress meter will automatically disappear when we reach 100% 163 * activity.setProgress(progress * 1000); 164 * } 165 * }); 166 * webview.setWebViewClient(new WebViewClient() { 167 * public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) { 168 * Toast.makeText(activity, "Oh no! " + description, Toast.LENGTH_SHORT).show(); 169 * } 170 * }); 171 * 172 * webview.loadUrl("http://slashdot.org/"); 173 * </pre> 174 * 175 * <h3>Cookie and window management</h3> 176 * 177 * <p>For obvious security reasons, your application has its own 178 * cache, cookie store etc - it does not share the Browser 179 * applications data. Cookies are managed on a separate thread, so 180 * operations like index building don't block the UI 181 * thread. Follow the instructions in {@link android.webkit.CookieSyncManager} 182 * if you want to use cookies in your application. 183 * </p> 184 * 185 * <p>By default, requests by the HTML to open new windows are 186 * ignored. This is true whether they be opened by JavaScript or by 187 * the target attribute on a link. You can customize your 188 * WebChromeClient to provide your own behaviour for opening multiple windows, 189 * and render them in whatever manner you want.</p> 190 * 191 * <p>Standard behavior for an Activity is to be destroyed and 192 * recreated when the devices orientation is changed. This will cause 193 * the WebView to reload the current page. If you don't want that, you 194 * can set your Activity to handle the orientation and keyboardHidden 195 * changes, and then just leave the WebView alone. It'll automatically 196 * re-orient itself as appropriate.</p> 197 */ 198public class WebView extends AbsoluteLayout 199 implements ViewTreeObserver.OnGlobalFocusChangeListener, 200 ViewGroup.OnHierarchyChangeListener { 201 202 // if AUTO_REDRAW_HACK is true, then the CALL key will toggle redrawing 203 // the screen all-the-time. Good for profiling our drawing code 204 static private final boolean AUTO_REDRAW_HACK = false; 205 // true means redraw the screen all-the-time. Only with AUTO_REDRAW_HACK 206 private boolean mAutoRedraw; 207 208 // keep debugging parameters near the top of the file 209 static final String LOGTAG = "webview"; 210 static final boolean DEBUG = false; 211 static final boolean LOGV_ENABLED = DEBUG; 212 213 private static class ExtendedZoomControls extends FrameLayout { 214 public ExtendedZoomControls(Context context, AttributeSet attrs) { 215 super(context, attrs); 216 LayoutInflater inflater = (LayoutInflater) 217 context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 218 inflater.inflate(com.android.internal.R.layout.zoom_magnify, this, true); 219 mZoomControls = (ZoomControls) findViewById(com.android.internal.R.id.zoomControls); 220 mZoomMagnify = (ImageView) findViewById(com.android.internal.R.id.zoomMagnify); 221 } 222 223 public void show(boolean showZoom, boolean canZoomOut) { 224 mZoomControls.setVisibility(showZoom ? View.VISIBLE : View.GONE); 225 mZoomMagnify.setVisibility(canZoomOut ? View.VISIBLE : View.GONE); 226 fade(View.VISIBLE, 0.0f, 1.0f); 227 } 228 229 public void hide() { 230 fade(View.GONE, 1.0f, 0.0f); 231 } 232 233 private void fade(int visibility, float startAlpha, float endAlpha) { 234 AlphaAnimation anim = new AlphaAnimation(startAlpha, endAlpha); 235 anim.setDuration(500); 236 startAnimation(anim); 237 setVisibility(visibility); 238 } 239 240 public void setIsZoomMagnifyEnabled(boolean isEnabled) { 241 mZoomMagnify.setEnabled(isEnabled); 242 } 243 244 public boolean hasFocus() { 245 return mZoomControls.hasFocus() || mZoomMagnify.hasFocus(); 246 } 247 248 public void setOnZoomInClickListener(OnClickListener listener) { 249 mZoomControls.setOnZoomInClickListener(listener); 250 } 251 252 public void setOnZoomOutClickListener(OnClickListener listener) { 253 mZoomControls.setOnZoomOutClickListener(listener); 254 } 255 256 public void setOnZoomMagnifyClickListener(OnClickListener listener) { 257 mZoomMagnify.setOnClickListener(listener); 258 } 259 260 ZoomControls mZoomControls; 261 ImageView mZoomMagnify; 262 } 263 264 /** 265 * Transportation object for returning WebView across thread boundaries. 266 */ 267 public class WebViewTransport { 268 private WebView mWebview; 269 270 /** 271 * Set the WebView to the transportation object. 272 * @param webview The WebView to transport. 273 */ 274 public synchronized void setWebView(WebView webview) { 275 mWebview = webview; 276 } 277 278 /** 279 * Return the WebView object. 280 * @return WebView The transported WebView object. 281 */ 282 public synchronized WebView getWebView() { 283 return mWebview; 284 } 285 } 286 287 // A final CallbackProxy shared by WebViewCore and BrowserFrame. 288 private final CallbackProxy mCallbackProxy; 289 290 private final WebViewDatabase mDatabase; 291 292 // SSL certificate for the main top-level page (if secure) 293 private SslCertificate mCertificate; 294 295 // Native WebView pointer that is 0 until the native object has been 296 // created. 297 private int mNativeClass; 298 // This would be final but it needs to be set to null when the WebView is 299 // destroyed. 300 private WebViewCore mWebViewCore; 301 // Handler for dispatching UI messages. 302 /* package */ final Handler mPrivateHandler = new PrivateHandler(); 303 private TextDialog mTextEntry; 304 // Used to ignore changes to webkit text that arrives to the UI side after 305 // more key events. 306 private int mTextGeneration; 307 308 // The list of loaded plugins. 309 private static PluginList sPluginList; 310 311 /** 312 * Position of the last touch event. 313 */ 314 private float mLastTouchX; 315 private float mLastTouchY; 316 317 /** 318 * Time of the last touch event. 319 */ 320 private long mLastTouchTime; 321 322 /** 323 * Time of the last time sending touch event to WebViewCore 324 */ 325 private long mLastSentTouchTime; 326 327 /** 328 * The minimum elapsed time before sending another ACTION_MOVE event to 329 * WebViewCore 330 */ 331 private static final int TOUCH_SENT_INTERVAL = 100; 332 333 /** 334 * Helper class to get velocity for fling 335 */ 336 VelocityTracker mVelocityTracker; 337 338 /** 339 * Touch mode 340 */ 341 private int mTouchMode = TOUCH_DONE_MODE; 342 private static final int TOUCH_INIT_MODE = 1; 343 private static final int TOUCH_DRAG_START_MODE = 2; 344 private static final int TOUCH_DRAG_MODE = 3; 345 private static final int TOUCH_SHORTPRESS_START_MODE = 4; 346 private static final int TOUCH_SHORTPRESS_MODE = 5; 347 private static final int TOUCH_DOUBLECLICK_MODE = 6; 348 private static final int TOUCH_DONE_MODE = 7; 349 private static final int TOUCH_SELECT_MODE = 8; 350 // touch mode values specific to scale+scroll 351 private static final int FIRST_SCROLL_ZOOM = 9; 352 private static final int SCROLL_ZOOM_ANIMATION_IN = 9; 353 private static final int SCROLL_ZOOM_ANIMATION_OUT = 10; 354 private static final int SCROLL_ZOOM_OUT = 11; 355 private static final int LAST_SCROLL_ZOOM = 11; 356 // end of touch mode values specific to scale+scroll 357 358 // Whether to forward the touch events to WebCore 359 private boolean mForwardTouchEvents = false; 360 361 // Whether to prevent drag during touch. The initial value depends on 362 // mForwardTouchEvents. If WebCore wants touch events, we assume it will 363 // take control of touch events unless it says no for touch down event. 364 private boolean mPreventDrag; 365 366 // If updateTextEntry gets called while we are out of focus, use this 367 // variable to remember to do it next time we gain focus. 368 private boolean mNeedsUpdateTextEntry = false; 369 370 // Whether or not to draw the cursor ring. 371 private boolean mDrawCursorRing = true; 372 373 // true if onPause has been called (and not onResume) 374 private boolean mIsPaused; 375 376 /** 377 * Customizable constant 378 */ 379 // pre-computed square of ViewConfiguration.getScaledTouchSlop() 380 private int mTouchSlopSquare; 381 // pre-computed density adjusted navigation slop 382 private int mNavSlop; 383 // This should be ViewConfiguration.getTapTimeout() 384 // But system time out is 100ms, which is too short for the browser. 385 // In the browser, if it switches out of tap too soon, jump tap won't work. 386 private static final int TAP_TIMEOUT = 200; 387 // This should be ViewConfiguration.getLongPressTimeout() 388 // But system time out is 500ms, which is too short for the browser. 389 // With a short timeout, it's difficult to treat trigger a short press. 390 private static final int LONG_PRESS_TIMEOUT = 1000; 391 // needed to avoid flinging after a pause of no movement 392 private static final int MIN_FLING_TIME = 250; 393 // The time that the Zoom Controls are visible before fading away 394 private static final long ZOOM_CONTROLS_TIMEOUT = 395 ViewConfiguration.getZoomControlsTimeout(); 396 // The amount of content to overlap between two screens when going through 397 // pages with the space bar, in pixels. 398 private static final int PAGE_SCROLL_OVERLAP = 24; 399 400 /** 401 * These prevent calling requestLayout if either dimension is fixed. This 402 * depends on the layout parameters and the measure specs. 403 */ 404 boolean mWidthCanMeasure; 405 boolean mHeightCanMeasure; 406 407 // Remember the last dimensions we sent to the native side so we can avoid 408 // sending the same dimensions more than once. 409 int mLastWidthSent; 410 int mLastHeightSent; 411 412 private int mContentWidth; // cache of value from WebViewCore 413 private int mContentHeight; // cache of value from WebViewCore 414 415 // Need to have the separate control for horizontal and vertical scrollbar 416 // style than the View's single scrollbar style 417 private boolean mOverlayHorizontalScrollbar = true; 418 private boolean mOverlayVerticalScrollbar = false; 419 420 // our standard speed. this way small distances will be traversed in less 421 // time than large distances, but we cap the duration, so that very large 422 // distances won't take too long to get there. 423 private static final int STD_SPEED = 480; // pixels per second 424 // time for the longest scroll animation 425 private static final int MAX_DURATION = 750; // milliseconds 426 private Scroller mScroller; 427 428 private boolean mWrapContent; 429 430 /** 431 * Private message ids 432 */ 433 private static final int REMEMBER_PASSWORD = 1; 434 private static final int NEVER_REMEMBER_PASSWORD = 2; 435 private static final int SWITCH_TO_SHORTPRESS = 3; 436 private static final int SWITCH_TO_LONGPRESS = 4; 437 private static final int UPDATE_TEXT_ENTRY_ADAPTER = 6; 438 private static final int SWITCH_TO_CLICK = 7; 439 private static final int RESUME_WEBCORE_UPDATE = 8; 440 441 //! arg1=x, arg2=y 442 static final int SCROLL_TO_MSG_ID = 10; 443 static final int SCROLL_BY_MSG_ID = 11; 444 //! arg1=x, arg2=y 445 static final int SPAWN_SCROLL_TO_MSG_ID = 12; 446 //! arg1=x, arg2=y 447 static final int SYNC_SCROLL_TO_MSG_ID = 13; 448 static final int NEW_PICTURE_MSG_ID = 14; 449 static final int UPDATE_TEXT_ENTRY_MSG_ID = 15; 450 static final int WEBCORE_INITIALIZED_MSG_ID = 16; 451 static final int UPDATE_TEXTFIELD_TEXT_MSG_ID = 17; 452 static final int DID_FIRST_LAYOUT_MSG_ID = 18; 453 static final int RECOMPUTE_FOCUS_MSG_ID = 19; 454 455 static final int MARK_NODE_INVALID_ID = 21; 456 static final int UPDATE_CLIPBOARD = 22; 457 static final int LONG_PRESS_ENTER = 23; 458 static final int PREVENT_TOUCH_ID = 24; 459 static final int WEBCORE_NEED_TOUCH_EVENTS = 25; 460 // obj=Rect in doc coordinates 461 static final int INVAL_RECT_MSG_ID = 26; 462 463 static final String[] HandlerDebugString = { 464 "REMEMBER_PASSWORD", // = 1; 465 "NEVER_REMEMBER_PASSWORD", // = 2; 466 "SWITCH_TO_SHORTPRESS", // = 3; 467 "SWITCH_TO_LONGPRESS", // = 4; 468 "5", 469 "UPDATE_TEXT_ENTRY_ADAPTER", // = 6; 470 "SWITCH_TO_CLICK", // = 7; 471 "RESUME_WEBCORE_UPDATE", // = 8; 472 "9", 473 "SCROLL_TO_MSG_ID", // = 10; 474 "SCROLL_BY_MSG_ID", // = 11; 475 "SPAWN_SCROLL_TO_MSG_ID", // = 12; 476 "SYNC_SCROLL_TO_MSG_ID", // = 13; 477 "NEW_PICTURE_MSG_ID", // = 14; 478 "UPDATE_TEXT_ENTRY_MSG_ID", // = 15; 479 "WEBCORE_INITIALIZED_MSG_ID", // = 16; 480 "UPDATE_TEXTFIELD_TEXT_MSG_ID", // = 17; 481 "DID_FIRST_LAYOUT_MSG_ID", // = 18; 482 "RECOMPUTE_FOCUS_MSG_ID", // = 19; 483 "20", 484 "MARK_NODE_INVALID_ID", // = 21; 485 "UPDATE_CLIPBOARD", // = 22; 486 "LONG_PRESS_ENTER", // = 23; 487 "PREVENT_TOUCH_ID", // = 24; 488 "WEBCORE_NEED_TOUCH_EVENTS", // = 25; 489 "INVAL_RECT_MSG_ID" // = 26; 490 }; 491 492 // width which view is considered to be fully zoomed out 493 static final int ZOOM_OUT_WIDTH = 1008; 494 495 private static final float DEFAULT_MAX_ZOOM_SCALE = 4.0f; 496 private static final float DEFAULT_MIN_ZOOM_SCALE = 0.25f; 497 // scale limit, which can be set through viewport meta tag in the web page 498 private float mMaxZoomScale = DEFAULT_MAX_ZOOM_SCALE; 499 private float mMinZoomScale = DEFAULT_MIN_ZOOM_SCALE; 500 private boolean mMinZoomScaleFixed = false; 501 502 // initial scale in percent. 0 means using default. 503 private int mInitialScale = 0; 504 505 // set to true temporarily while the zoom control is being dragged 506 private boolean mPreviewZoomOnly = false; 507 508 // computed scale and inverse, from mZoomWidth. 509 private float mActualScale = 1; 510 private float mInvActualScale = 1; 511 // if this is non-zero, it is used on drawing rather than mActualScale 512 private float mZoomScale; 513 private float mInvInitialZoomScale; 514 private float mInvFinalZoomScale; 515 private long mZoomStart; 516 private static final int ZOOM_ANIMATION_LENGTH = 500; 517 518 private boolean mUserScroll = false; 519 520 private int mSnapScrollMode = SNAP_NONE; 521 private static final int SNAP_NONE = 1; 522 private static final int SNAP_X = 2; 523 private static final int SNAP_Y = 3; 524 private static final int SNAP_X_LOCK = 4; 525 private static final int SNAP_Y_LOCK = 5; 526 private boolean mSnapPositive; 527 528 // Used to match key downs and key ups 529 private boolean mGotKeyDown; 530 531 /* package */ static boolean mLogEvent = true; 532 private static final int EVENT_LOG_ZOOM_LEVEL_CHANGE = 70101; 533 private static final int EVENT_LOG_DOUBLE_TAP_DURATION = 70102; 534 535 // for event log 536 private long mLastTouchUpTime = 0; 537 538 /** 539 * URI scheme for telephone number 540 */ 541 public static final String SCHEME_TEL = "tel:"; 542 /** 543 * URI scheme for email address 544 */ 545 public static final String SCHEME_MAILTO = "mailto:"; 546 /** 547 * URI scheme for map address 548 */ 549 public static final String SCHEME_GEO = "geo:0,0?q="; 550 551 private int mBackgroundColor = Color.WHITE; 552 553 // Used to notify listeners of a new picture. 554 private PictureListener mPictureListener; 555 /** 556 * Interface to listen for new pictures as they change. 557 */ 558 public interface PictureListener { 559 /** 560 * Notify the listener that the picture has changed. 561 * @param view The WebView that owns the picture. 562 * @param picture The new picture. 563 */ 564 public void onNewPicture(WebView view, Picture picture); 565 } 566 567 // FIXME: Want to make this public, but need to change the API file. 568 public /*static*/ class HitTestResult { 569 /** 570 * Default HitTestResult, where the target is unknown 571 */ 572 public static final int UNKNOWN_TYPE = 0; 573 /** 574 * HitTestResult for hitting a HTML::a tag 575 */ 576 public static final int ANCHOR_TYPE = 1; 577 /** 578 * HitTestResult for hitting a phone number 579 */ 580 public static final int PHONE_TYPE = 2; 581 /** 582 * HitTestResult for hitting a map address 583 */ 584 public static final int GEO_TYPE = 3; 585 /** 586 * HitTestResult for hitting an email address 587 */ 588 public static final int EMAIL_TYPE = 4; 589 /** 590 * HitTestResult for hitting an HTML::img tag 591 */ 592 public static final int IMAGE_TYPE = 5; 593 /** 594 * HitTestResult for hitting a HTML::a tag which contains HTML::img 595 */ 596 public static final int IMAGE_ANCHOR_TYPE = 6; 597 /** 598 * HitTestResult for hitting a HTML::a tag with src=http 599 */ 600 public static final int SRC_ANCHOR_TYPE = 7; 601 /** 602 * HitTestResult for hitting a HTML::a tag with src=http + HTML::img 603 */ 604 public static final int SRC_IMAGE_ANCHOR_TYPE = 8; 605 /** 606 * HitTestResult for hitting an edit text area 607 */ 608 public static final int EDIT_TEXT_TYPE = 9; 609 610 private int mType; 611 private String mExtra; 612 613 HitTestResult() { 614 mType = UNKNOWN_TYPE; 615 } 616 617 private void setType(int type) { 618 mType = type; 619 } 620 621 private void setExtra(String extra) { 622 mExtra = extra; 623 } 624 625 public int getType() { 626 return mType; 627 } 628 629 public String getExtra() { 630 return mExtra; 631 } 632 } 633 634 // The View containing the zoom controls 635 private ExtendedZoomControls mZoomControls; 636 private Runnable mZoomControlRunnable; 637 638 private ZoomButtonsController mZoomButtonsController; 639 private ImageView mZoomOverviewButton; 640 private ImageView mZoomFitPageButton; 641 642 // These keep track of the center point of the zoom. They are used to 643 // determine the point around which we should zoom. 644 private float mZoomCenterX; 645 private float mZoomCenterY; 646 647 private ZoomButtonsController.OnZoomListener mZoomListener = 648 new ZoomButtonsController.OnZoomListener() { 649 650 public void onVisibilityChanged(boolean visible) { 651 if (visible) { 652 switchOutDrawHistory(); 653 updateZoomButtonsEnabled(); 654 } 655 } 656 657 public void onZoom(boolean zoomIn) { 658 if (zoomIn) { 659 zoomIn(); 660 } else { 661 zoomOut(); 662 } 663 664 updateZoomButtonsEnabled(); 665 } 666 }; 667 668 /** 669 * Construct a new WebView with a Context object. 670 * @param context A Context object used to access application assets. 671 */ 672 public WebView(Context context) { 673 this(context, null); 674 } 675 676 /** 677 * Construct a new WebView with layout parameters. 678 * @param context A Context object used to access application assets. 679 * @param attrs An AttributeSet passed to our parent. 680 */ 681 public WebView(Context context, AttributeSet attrs) { 682 this(context, attrs, com.android.internal.R.attr.webViewStyle); 683 } 684 685 /** 686 * Construct a new WebView with layout parameters and a default style. 687 * @param context A Context object used to access application assets. 688 * @param attrs An AttributeSet passed to our parent. 689 * @param defStyle The default style resource ID. 690 */ 691 public WebView(Context context, AttributeSet attrs, int defStyle) { 692 super(context, attrs, defStyle); 693 init(); 694 695 mCallbackProxy = new CallbackProxy(context, this); 696 mWebViewCore = new WebViewCore(context, this, mCallbackProxy); 697 mDatabase = WebViewDatabase.getInstance(context); 698 mScroller = new Scroller(context); 699 700 initZoomController(context); 701 } 702 703 private void initZoomController(Context context) { 704 // Create the buttons controller 705 mZoomButtonsController = new ZoomButtonsController(this); 706 mZoomButtonsController.setOnZoomListener(mZoomListener); 707 708 // Create the accessory buttons 709 LayoutInflater inflater = 710 (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 711 ViewGroup container = mZoomButtonsController.getContainer(); 712 inflater.inflate(com.android.internal.R.layout.zoom_browser_accessory_buttons, container); 713 mZoomOverviewButton = 714 (ImageView) container.findViewById(com.android.internal.R.id.zoom_page_overview); 715 mZoomOverviewButton.setOnClickListener( 716 new View.OnClickListener() { 717 public void onClick(View v) { 718 mZoomButtonsController.setVisible(false); 719 zoomScrollOut(); 720 if (mLogEvent) { 721 Checkin.updateStats(mContext.getContentResolver(), 722 Checkin.Stats.Tag.BROWSER_ZOOM_OVERVIEW, 1, 0.0); 723 } 724 } 725 }); 726 mZoomFitPageButton = 727 (ImageView) container.findViewById(com.android.internal.R.id.zoom_fit_page); 728 mZoomFitPageButton.setOnClickListener( 729 new View.OnClickListener() { 730 public void onClick(View v) { 731 zoomWithPreview(1f); 732 updateZoomButtonsEnabled(); 733 } 734 }); 735 } 736 737 private void updateZoomButtonsEnabled() { 738 boolean canZoomIn = mActualScale < mMaxZoomScale; 739 boolean canZoomOut = mActualScale > mMinZoomScale; 740 if (!canZoomIn && !canZoomOut) { 741 // Hide the zoom in and out buttons, as well as the fit to page 742 // button, if the page cannot zoom 743 mZoomButtonsController.getZoomControls().setVisibility(View.GONE); 744 mZoomFitPageButton.setVisibility(View.GONE); 745 } else { 746 // Bring back the hidden zoom controls. 747 mZoomButtonsController.getZoomControls() 748 .setVisibility(View.VISIBLE); 749 mZoomFitPageButton.setVisibility(View.VISIBLE); 750 // Set each one individually, as a page may be able to zoom in 751 // or out. 752 mZoomButtonsController.setZoomInEnabled(canZoomIn); 753 mZoomButtonsController.setZoomOutEnabled(canZoomOut); 754 mZoomFitPageButton.setEnabled(mActualScale != 1); 755 } 756 mZoomOverviewButton.setVisibility(canZoomScrollOut() ? View.VISIBLE: 757 View.GONE); 758 } 759 760 private void init() { 761 setWillNotDraw(false); 762 setFocusable(true); 763 setFocusableInTouchMode(true); 764 setClickable(true); 765 setLongClickable(true); 766 767 final int slop = ViewConfiguration.get(getContext()).getScaledTouchSlop(); 768 mTouchSlopSquare = slop * slop; 769 mMinLockSnapReverseDistance = slop; 770 // use one line height, 16 based on our current default font, for how 771 // far we allow a touch be away from the edge of a link 772 mNavSlop = (int) (16 * getContext().getResources() 773 .getDisplayMetrics().density); 774 } 775 776 /* package */ boolean onSavePassword(String schemePlusHost, String username, 777 String password, final Message resumeMsg) { 778 boolean rVal = false; 779 if (resumeMsg == null) { 780 // null resumeMsg implies saving password silently 781 mDatabase.setUsernamePassword(schemePlusHost, username, password); 782 } else { 783 final Message remember = mPrivateHandler.obtainMessage( 784 REMEMBER_PASSWORD); 785 remember.getData().putString("host", schemePlusHost); 786 remember.getData().putString("username", username); 787 remember.getData().putString("password", password); 788 remember.obj = resumeMsg; 789 790 final Message neverRemember = mPrivateHandler.obtainMessage( 791 NEVER_REMEMBER_PASSWORD); 792 neverRemember.getData().putString("host", schemePlusHost); 793 neverRemember.getData().putString("username", username); 794 neverRemember.getData().putString("password", password); 795 neverRemember.obj = resumeMsg; 796 797 new AlertDialog.Builder(getContext()) 798 .setTitle(com.android.internal.R.string.save_password_label) 799 .setMessage(com.android.internal.R.string.save_password_message) 800 .setPositiveButton(com.android.internal.R.string.save_password_notnow, 801 new DialogInterface.OnClickListener() { 802 public void onClick(DialogInterface dialog, int which) { 803 resumeMsg.sendToTarget(); 804 } 805 }) 806 .setNeutralButton(com.android.internal.R.string.save_password_remember, 807 new DialogInterface.OnClickListener() { 808 public void onClick(DialogInterface dialog, int which) { 809 remember.sendToTarget(); 810 } 811 }) 812 .setNegativeButton(com.android.internal.R.string.save_password_never, 813 new DialogInterface.OnClickListener() { 814 public void onClick(DialogInterface dialog, int which) { 815 neverRemember.sendToTarget(); 816 } 817 }) 818 .setOnCancelListener(new OnCancelListener() { 819 public void onCancel(DialogInterface dialog) { 820 resumeMsg.sendToTarget(); 821 } 822 }).show(); 823 // Return true so that WebViewCore will pause while the dialog is 824 // up. 825 rVal = true; 826 } 827 return rVal; 828 } 829 830 @Override 831 public void setScrollBarStyle(int style) { 832 if (style == View.SCROLLBARS_INSIDE_INSET 833 || style == View.SCROLLBARS_OUTSIDE_INSET) { 834 mOverlayHorizontalScrollbar = mOverlayVerticalScrollbar = false; 835 } else { 836 mOverlayHorizontalScrollbar = mOverlayVerticalScrollbar = true; 837 } 838 super.setScrollBarStyle(style); 839 } 840 841 /** 842 * Specify whether the horizontal scrollbar has overlay style. 843 * @param overlay TRUE if horizontal scrollbar should have overlay style. 844 */ 845 public void setHorizontalScrollbarOverlay(boolean overlay) { 846 mOverlayHorizontalScrollbar = overlay; 847 } 848 849 /** 850 * Specify whether the vertical scrollbar has overlay style. 851 * @param overlay TRUE if vertical scrollbar should have overlay style. 852 */ 853 public void setVerticalScrollbarOverlay(boolean overlay) { 854 mOverlayVerticalScrollbar = overlay; 855 } 856 857 /** 858 * Return whether horizontal scrollbar has overlay style 859 * @return TRUE if horizontal scrollbar has overlay style. 860 */ 861 public boolean overlayHorizontalScrollbar() { 862 return mOverlayHorizontalScrollbar; 863 } 864 865 /** 866 * Return whether vertical scrollbar has overlay style 867 * @return TRUE if vertical scrollbar has overlay style. 868 */ 869 public boolean overlayVerticalScrollbar() { 870 return mOverlayVerticalScrollbar; 871 } 872 873 /* 874 * Return the width of the view where the content of WebView should render 875 * to. 876 */ 877 private int getViewWidth() { 878 if (!isVerticalScrollBarEnabled() || mOverlayVerticalScrollbar) { 879 return getWidth(); 880 } else { 881 return getWidth() - getVerticalScrollbarWidth(); 882 } 883 } 884 885 /* 886 * Return the height of the view where the content of WebView should render 887 * to. 888 */ 889 private int getViewHeight() { 890 if (!isHorizontalScrollBarEnabled() || mOverlayHorizontalScrollbar) { 891 return getHeight(); 892 } else { 893 return getHeight() - getHorizontalScrollbarHeight(); 894 } 895 } 896 897 /** 898 * @return The SSL certificate for the main top-level page or null if 899 * there is no certificate (the site is not secure). 900 */ 901 public SslCertificate getCertificate() { 902 return mCertificate; 903 } 904 905 /** 906 * Sets the SSL certificate for the main top-level page. 907 */ 908 public void setCertificate(SslCertificate certificate) { 909 // here, the certificate can be null (if the site is not secure) 910 mCertificate = certificate; 911 } 912 913 //------------------------------------------------------------------------- 914 // Methods called by activity 915 //------------------------------------------------------------------------- 916 917 /** 918 * Save the username and password for a particular host in the WebView's 919 * internal database. 920 * @param host The host that required the credentials. 921 * @param username The username for the given host. 922 * @param password The password for the given host. 923 */ 924 public void savePassword(String host, String username, String password) { 925 mDatabase.setUsernamePassword(host, username, password); 926 } 927 928 /** 929 * Set the HTTP authentication credentials for a given host and realm. 930 * 931 * @param host The host for the credentials. 932 * @param realm The realm for the credentials. 933 * @param username The username for the password. If it is null, it means 934 * password can't be saved. 935 * @param password The password 936 */ 937 public void setHttpAuthUsernamePassword(String host, String realm, 938 String username, String password) { 939 mDatabase.setHttpAuthUsernamePassword(host, realm, username, password); 940 } 941 942 /** 943 * Retrieve the HTTP authentication username and password for a given 944 * host & realm pair 945 * 946 * @param host The host for which the credentials apply. 947 * @param realm The realm for which the credentials apply. 948 * @return String[] if found, String[0] is username, which can be null and 949 * String[1] is password. Return null if it can't find anything. 950 */ 951 public String[] getHttpAuthUsernamePassword(String host, String realm) { 952 return mDatabase.getHttpAuthUsernamePassword(host, realm); 953 } 954 955 /** 956 * Destroy the internal state of the WebView. This method should be called 957 * after the WebView has been removed from the view system. No other 958 * methods may be called on a WebView after destroy. 959 */ 960 public void destroy() { 961 clearTextEntry(); 962 if (mWebViewCore != null) { 963 // Set the handlers to null before destroying WebViewCore so no 964 // more messages will be posted. 965 mCallbackProxy.setWebViewClient(null); 966 mCallbackProxy.setWebChromeClient(null); 967 // Tell WebViewCore to destroy itself 968 WebViewCore webViewCore = mWebViewCore; 969 mWebViewCore = null; // prevent using partial webViewCore 970 webViewCore.destroy(); 971 // Remove any pending messages that might not be serviced yet. 972 mPrivateHandler.removeCallbacksAndMessages(null); 973 mCallbackProxy.removeCallbacksAndMessages(null); 974 // Wake up the WebCore thread just in case it is waiting for a 975 // javascript dialog. 976 synchronized (mCallbackProxy) { 977 mCallbackProxy.notify(); 978 } 979 } 980 if (mNativeClass != 0) { 981 nativeDestroy(); 982 mNativeClass = 0; 983 } 984 } 985 986 /** 987 * Enables platform notifications of data state and proxy changes. 988 */ 989 public static void enablePlatformNotifications() { 990 Network.enablePlatformNotifications(); 991 } 992 993 /** 994 * If platform notifications are enabled, this should be called 995 * from the Activity's onPause() or onStop(). 996 */ 997 public static void disablePlatformNotifications() { 998 Network.disablePlatformNotifications(); 999 } 1000 1001 /** 1002 * Inform WebView of the network state. This is used to set 1003 * the javascript property window.navigator.isOnline and 1004 * generates the online/offline event as specified in HTML5, sec. 5.7.7 1005 * @param networkUp boolean indicating if network is available 1006 */ 1007 public void setNetworkAvailable(boolean networkUp) { 1008 mWebViewCore.sendMessage(EventHub.SET_NETWORK_STATE, 1009 networkUp ? 1 : 0, 0); 1010 } 1011 1012 /** 1013 * Save the state of this WebView used in 1014 * {@link android.app.Activity#onSaveInstanceState}. Please note that this 1015 * method no longer stores the display data for this WebView. The previous 1016 * behavior could potentially leak files if {@link #restoreState} was never 1017 * called. See {@link #savePicture} and {@link #restorePicture} for saving 1018 * and restoring the display data. 1019 * @param outState The Bundle to store the WebView state. 1020 * @return The same copy of the back/forward list used to save the state. If 1021 * saveState fails, the returned list will be null. 1022 * @see #savePicture 1023 * @see #restorePicture 1024 */ 1025 public WebBackForwardList saveState(Bundle outState) { 1026 if (outState == null) { 1027 return null; 1028 } 1029 // We grab a copy of the back/forward list because a client of WebView 1030 // may have invalidated the history list by calling clearHistory. 1031 WebBackForwardList list = copyBackForwardList(); 1032 final int currentIndex = list.getCurrentIndex(); 1033 final int size = list.getSize(); 1034 // We should fail saving the state if the list is empty or the index is 1035 // not in a valid range. 1036 if (currentIndex < 0 || currentIndex >= size || size == 0) { 1037 return null; 1038 } 1039 outState.putInt("index", currentIndex); 1040 // FIXME: This should just be a byte[][] instead of ArrayList but 1041 // Parcel.java does not have the code to handle multi-dimensional 1042 // arrays. 1043 ArrayList<byte[]> history = new ArrayList<byte[]>(size); 1044 for (int i = 0; i < size; i++) { 1045 WebHistoryItem item = list.getItemAtIndex(i); 1046 byte[] data = item.getFlattenedData(); 1047 if (data == null) { 1048 // It would be very odd to not have any data for a given history 1049 // item. And we will fail to rebuild the history list without 1050 // flattened data. 1051 return null; 1052 } 1053 history.add(data); 1054 } 1055 outState.putSerializable("history", history); 1056 if (mCertificate != null) { 1057 outState.putBundle("certificate", 1058 SslCertificate.saveState(mCertificate)); 1059 } 1060 return list; 1061 } 1062 1063 /** 1064 * Save the current display data to the Bundle given. Used in conjunction 1065 * with {@link #saveState}. 1066 * @param b A Bundle to store the display data. 1067 * @param dest The file to store the serialized picture data. Will be 1068 * overwritten with this WebView's picture data. 1069 * @return True if the picture was successfully saved. 1070 */ 1071 public boolean savePicture(Bundle b, File dest) { 1072 if (dest == null || b == null) { 1073 return false; 1074 } 1075 final Picture p = capturePicture(); 1076 try { 1077 final FileOutputStream out = new FileOutputStream(dest); 1078 p.writeToStream(out); 1079 out.close(); 1080 } catch (FileNotFoundException e){ 1081 e.printStackTrace(); 1082 } catch (IOException e) { 1083 e.printStackTrace(); 1084 } catch (RuntimeException e) { 1085 e.printStackTrace(); 1086 } 1087 if (dest.length() > 0) { 1088 b.putInt("scrollX", mScrollX); 1089 b.putInt("scrollY", mScrollY); 1090 b.putFloat("scale", mActualScale); 1091 return true; 1092 } 1093 return false; 1094 } 1095 1096 /** 1097 * Restore the display data that was save in {@link #savePicture}. Used in 1098 * conjunction with {@link #restoreState}. 1099 * @param b A Bundle containing the saved display data. 1100 * @param src The file where the picture data was stored. 1101 * @return True if the picture was successfully restored. 1102 */ 1103 public boolean restorePicture(Bundle b, File src) { 1104 if (src == null || b == null) { 1105 return false; 1106 } 1107 if (src.exists()) { 1108 Picture p = null; 1109 try { 1110 final FileInputStream in = new FileInputStream(src); 1111 p = Picture.createFromStream(in); 1112 in.close(); 1113 } catch (FileNotFoundException e){ 1114 e.printStackTrace(); 1115 } catch (RuntimeException e) { 1116 e.printStackTrace(); 1117 } catch (IOException e) { 1118 e.printStackTrace(); 1119 } 1120 if (p != null) { 1121 int sx = b.getInt("scrollX", 0); 1122 int sy = b.getInt("scrollY", 0); 1123 float scale = b.getFloat("scale", 1.0f); 1124 mDrawHistory = true; 1125 mHistoryPicture = p; 1126 mScrollX = sx; 1127 mScrollY = sy; 1128 mHistoryWidth = Math.round(p.getWidth() * scale); 1129 mHistoryHeight = Math.round(p.getHeight() * scale); 1130 // as getWidth() / getHeight() of the view are not 1131 // available yet, set up mActualScale, so that when 1132 // onSizeChanged() is called, the rest will be set 1133 // correctly 1134 mActualScale = scale; 1135 invalidate(); 1136 return true; 1137 } 1138 } 1139 return false; 1140 } 1141 1142 /** 1143 * Restore the state of this WebView from the given map used in 1144 * {@link android.app.Activity#onRestoreInstanceState}. This method should 1145 * be called to restore the state of the WebView before using the object. If 1146 * it is called after the WebView has had a chance to build state (load 1147 * pages, create a back/forward list, etc.) there may be undesirable 1148 * side-effects. Please note that this method no longer restores the 1149 * display data for this WebView. See {@link #savePicture} and {@link 1150 * #restorePicture} for saving and restoring the display data. 1151 * @param inState The incoming Bundle of state. 1152 * @return The restored back/forward list or null if restoreState failed. 1153 * @see #savePicture 1154 * @see #restorePicture 1155 */ 1156 public WebBackForwardList restoreState(Bundle inState) { 1157 WebBackForwardList returnList = null; 1158 if (inState == null) { 1159 return returnList; 1160 } 1161 if (inState.containsKey("index") && inState.containsKey("history")) { 1162 mCertificate = SslCertificate.restoreState( 1163 inState.getBundle("certificate")); 1164 1165 final WebBackForwardList list = mCallbackProxy.getBackForwardList(); 1166 final int index = inState.getInt("index"); 1167 // We can't use a clone of the list because we need to modify the 1168 // shared copy, so synchronize instead to prevent concurrent 1169 // modifications. 1170 synchronized (list) { 1171 final List<byte[]> history = 1172 (List<byte[]>) inState.getSerializable("history"); 1173 final int size = history.size(); 1174 // Check the index bounds so we don't crash in native code while 1175 // restoring the history index. 1176 if (index < 0 || index >= size) { 1177 return null; 1178 } 1179 for (int i = 0; i < size; i++) { 1180 byte[] data = history.remove(0); 1181 if (data == null) { 1182 // If we somehow have null data, we cannot reconstruct 1183 // the item and thus our history list cannot be rebuilt. 1184 return null; 1185 } 1186 WebHistoryItem item = new WebHistoryItem(data); 1187 list.addHistoryItem(item); 1188 } 1189 // Grab the most recent copy to return to the caller. 1190 returnList = copyBackForwardList(); 1191 // Update the copy to have the correct index. 1192 returnList.setCurrentIndex(index); 1193 } 1194 // Remove all pending messages because we are restoring previous 1195 // state. 1196 mWebViewCore.removeMessages(); 1197 // Send a restore state message. 1198 mWebViewCore.sendMessage(EventHub.RESTORE_STATE, index); 1199 } 1200 return returnList; 1201 } 1202 1203 /** 1204 * Load the given url. 1205 * @param url The url of the resource to load. 1206 */ 1207 public void loadUrl(String url) { 1208 switchOutDrawHistory(); 1209 mWebViewCore.sendMessage(EventHub.LOAD_URL, url); 1210 clearTextEntry(); 1211 } 1212 1213 /** 1214 * Load the url with postData using "POST" method into the WebView. If url 1215 * is not a network url, it will be loaded with {link 1216 * {@link #loadUrl(String)} instead. 1217 * 1218 * @param url The url of the resource to load. 1219 * @param postData The data will be passed to "POST" request. 1220 * 1221 * @hide pending API solidification 1222 */ 1223 public void postUrl(String url, byte[] postData) { 1224 if (URLUtil.isNetworkUrl(url)) { 1225 switchOutDrawHistory(); 1226 HashMap arg = new HashMap(); 1227 arg.put("url", url); 1228 arg.put("data", postData); 1229 mWebViewCore.sendMessage(EventHub.POST_URL, arg); 1230 clearTextEntry(); 1231 } else { 1232 loadUrl(url); 1233 } 1234 } 1235 1236 /** 1237 * Load the given data into the WebView. This will load the data into 1238 * WebView using the data: scheme. Content loaded through this mechanism 1239 * does not have the ability to load content from the network. 1240 * @param data A String of data in the given encoding. 1241 * @param mimeType The MIMEType of the data. i.e. text/html, image/jpeg 1242 * @param encoding The encoding of the data. i.e. utf-8, base64 1243 */ 1244 public void loadData(String data, String mimeType, String encoding) { 1245 loadUrl("data:" + mimeType + ";" + encoding + "," + data); 1246 } 1247 1248 /** 1249 * Load the given data into the WebView, use the provided URL as the base 1250 * URL for the content. The base URL is the URL that represents the page 1251 * that is loaded through this interface. As such, it is used for the 1252 * history entry and to resolve any relative URLs. The failUrl is used if 1253 * browser fails to load the data provided. If it is empty or null, and the 1254 * load fails, then no history entry is created. 1255 * <p> 1256 * Note for post 1.0. Due to the change in the WebKit, the access to asset 1257 * files through "file:///android_asset/" for the sub resources is more 1258 * restricted. If you provide null or empty string as baseUrl, you won't be 1259 * able to access asset files. If the baseUrl is anything other than 1260 * http(s)/ftp(s)/about/javascript as scheme, you can access asset files for 1261 * sub resources. 1262 * 1263 * @param baseUrl Url to resolve relative paths with, if null defaults to 1264 * "about:blank" 1265 * @param data A String of data in the given encoding. 1266 * @param mimeType The MIMEType of the data. i.e. text/html. If null, 1267 * defaults to "text/html" 1268 * @param encoding The encoding of the data. i.e. utf-8, us-ascii 1269 * @param failUrl URL to use if the content fails to load or null. 1270 */ 1271 public void loadDataWithBaseURL(String baseUrl, String data, 1272 String mimeType, String encoding, String failUrl) { 1273 1274 if (baseUrl != null && baseUrl.toLowerCase().startsWith("data:")) { 1275 loadData(data, mimeType, encoding); 1276 return; 1277 } 1278 switchOutDrawHistory(); 1279 HashMap arg = new HashMap(); 1280 arg.put("baseUrl", baseUrl); 1281 arg.put("data", data); 1282 arg.put("mimeType", mimeType); 1283 arg.put("encoding", encoding); 1284 arg.put("failUrl", failUrl); 1285 mWebViewCore.sendMessage(EventHub.LOAD_DATA, arg); 1286 clearTextEntry(); 1287 } 1288 1289 /** 1290 * Stop the current load. 1291 */ 1292 public void stopLoading() { 1293 // TODO: should we clear all the messages in the queue before sending 1294 // STOP_LOADING? 1295 switchOutDrawHistory(); 1296 mWebViewCore.sendMessage(EventHub.STOP_LOADING); 1297 } 1298 1299 /** 1300 * Reload the current url. 1301 */ 1302 public void reload() { 1303 switchOutDrawHistory(); 1304 mWebViewCore.sendMessage(EventHub.RELOAD); 1305 } 1306 1307 /** 1308 * Return true if this WebView has a back history item. 1309 * @return True iff this WebView has a back history item. 1310 */ 1311 public boolean canGoBack() { 1312 WebBackForwardList l = mCallbackProxy.getBackForwardList(); 1313 synchronized (l) { 1314 if (l.getClearPending()) { 1315 return false; 1316 } else { 1317 return l.getCurrentIndex() > 0; 1318 } 1319 } 1320 } 1321 1322 /** 1323 * Go back in the history of this WebView. 1324 */ 1325 public void goBack() { 1326 goBackOrForward(-1); 1327 } 1328 1329 /** 1330 * Return true if this WebView has a forward history item. 1331 * @return True iff this Webview has a forward history item. 1332 */ 1333 public boolean canGoForward() { 1334 WebBackForwardList l = mCallbackProxy.getBackForwardList(); 1335 synchronized (l) { 1336 if (l.getClearPending()) { 1337 return false; 1338 } else { 1339 return l.getCurrentIndex() < l.getSize() - 1; 1340 } 1341 } 1342 } 1343 1344 /** 1345 * Go forward in the history of this WebView. 1346 */ 1347 public void goForward() { 1348 goBackOrForward(1); 1349 } 1350 1351 /** 1352 * Return true if the page can go back or forward the given 1353 * number of steps. 1354 * @param steps The negative or positive number of steps to move the 1355 * history. 1356 */ 1357 public boolean canGoBackOrForward(int steps) { 1358 WebBackForwardList l = mCallbackProxy.getBackForwardList(); 1359 synchronized (l) { 1360 if (l.getClearPending()) { 1361 return false; 1362 } else { 1363 int newIndex = l.getCurrentIndex() + steps; 1364 return newIndex >= 0 && newIndex < l.getSize(); 1365 } 1366 } 1367 } 1368 1369 /** 1370 * Go to the history item that is the number of steps away from 1371 * the current item. Steps is negative if backward and positive 1372 * if forward. 1373 * @param steps The number of steps to take back or forward in the back 1374 * forward list. 1375 */ 1376 public void goBackOrForward(int steps) { 1377 goBackOrForward(steps, false); 1378 } 1379 1380 private void goBackOrForward(int steps, boolean ignoreSnapshot) { 1381 // every time we go back or forward, we want to reset the 1382 // WebView certificate: 1383 // if the new site is secure, we will reload it and get a 1384 // new certificate set; 1385 // if the new site is not secure, the certificate must be 1386 // null, and that will be the case 1387 mCertificate = null; 1388 if (steps != 0) { 1389 clearTextEntry(); 1390 mWebViewCore.sendMessage(EventHub.GO_BACK_FORWARD, steps, 1391 ignoreSnapshot ? 1 : 0); 1392 } 1393 } 1394 1395 private boolean extendScroll(int y) { 1396 int finalY = mScroller.getFinalY(); 1397 int newY = pinLocY(finalY + y); 1398 if (newY == finalY) return false; 1399 mScroller.setFinalY(newY); 1400 mScroller.extendDuration(computeDuration(0, y)); 1401 return true; 1402 } 1403 1404 /** 1405 * Scroll the contents of the view up by half the view size 1406 * @param top true to jump to the top of the page 1407 * @return true if the page was scrolled 1408 */ 1409 public boolean pageUp(boolean top) { 1410 if (mNativeClass == 0) { 1411 return false; 1412 } 1413 nativeClearFocus(-1, -1); 1414 if (top) { 1415 // go to the top of the document 1416 return pinScrollTo(mScrollX, 0, true, 0); 1417 } 1418 // Page up 1419 int h = getHeight(); 1420 int y; 1421 if (h > 2 * PAGE_SCROLL_OVERLAP) { 1422 y = -h + PAGE_SCROLL_OVERLAP; 1423 } else { 1424 y = -h / 2; 1425 } 1426 mUserScroll = true; 1427 return mScroller.isFinished() ? pinScrollBy(0, y, true, 0) 1428 : extendScroll(y); 1429 } 1430 1431 /** 1432 * Scroll the contents of the view down by half the page size 1433 * @param bottom true to jump to bottom of page 1434 * @return true if the page was scrolled 1435 */ 1436 public boolean pageDown(boolean bottom) { 1437 if (mNativeClass == 0) { 1438 return false; 1439 } 1440 nativeClearFocus(-1, -1); 1441 if (bottom) { 1442 return pinScrollTo(mScrollX, mContentHeight, true, 0); 1443 } 1444 // Page down. 1445 int h = getHeight(); 1446 int y; 1447 if (h > 2 * PAGE_SCROLL_OVERLAP) { 1448 y = h - PAGE_SCROLL_OVERLAP; 1449 } else { 1450 y = h / 2; 1451 } 1452 mUserScroll = true; 1453 return mScroller.isFinished() ? pinScrollBy(0, y, true, 0) 1454 : extendScroll(y); 1455 } 1456 1457 /** 1458 * Clear the view so that onDraw() will draw nothing but white background, 1459 * and onMeasure() will return 0 if MeasureSpec is not MeasureSpec.EXACTLY 1460 */ 1461 public void clearView() { 1462 mContentWidth = 0; 1463 mContentHeight = 0; 1464 mWebViewCore.sendMessage(EventHub.CLEAR_CONTENT); 1465 } 1466 1467 /** 1468 * Return a new picture that captures the current display of the webview. 1469 * This is a copy of the display, and will be unaffected if the webview 1470 * later loads a different URL. 1471 * 1472 * @return a picture containing the current contents of the view. Note this 1473 * picture is of the entire document, and is not restricted to the 1474 * bounds of the view. 1475 */ 1476 public Picture capturePicture() { 1477 if (null == mWebViewCore) return null; // check for out of memory tab 1478 return mWebViewCore.copyContentPicture(); 1479 } 1480 1481 /** 1482 * Return true if the browser is displaying a TextView for text input. 1483 */ 1484 private boolean inEditingMode() { 1485 return mTextEntry != null && mTextEntry.getParent() != null 1486 && mTextEntry.hasFocus(); 1487 } 1488 1489 private void clearTextEntry() { 1490 if (inEditingMode()) { 1491 mTextEntry.remove(); 1492 } 1493 } 1494 1495 /** 1496 * Return the current scale of the WebView 1497 * @return The current scale. 1498 */ 1499 public float getScale() { 1500 return mActualScale; 1501 } 1502 1503 /** 1504 * Set the initial scale for the WebView. 0 means default. If 1505 * {@link WebSettings#getUseWideViewPort()} is true, it zooms out all the 1506 * way. Otherwise it starts with 100%. If initial scale is greater than 0, 1507 * WebView starts will this value as initial scale. 1508 * 1509 * @param scaleInPercent The initial scale in percent. 1510 */ 1511 public void setInitialScale(int scaleInPercent) { 1512 mInitialScale = scaleInPercent; 1513 } 1514 1515 /** 1516 * Invoke the graphical zoom picker widget for this WebView. This will 1517 * result in the zoom widget appearing on the screen to control the zoom 1518 * level of this WebView. 1519 */ 1520 public void invokeZoomPicker() { 1521 if (!getSettings().supportZoom()) { 1522 Log.w(LOGTAG, "This WebView doesn't support zoom."); 1523 return; 1524 } 1525 clearTextEntry(); 1526 if (getSettings().getBuiltInZoomControls()) { 1527 mZoomButtonsController.setVisible(true); 1528 } else { 1529 mPrivateHandler.removeCallbacks(mZoomControlRunnable); 1530 mPrivateHandler.postDelayed(mZoomControlRunnable, 1531 ZOOM_CONTROLS_TIMEOUT); 1532 } 1533 } 1534 1535 /** 1536 * Return a HitTestResult based on the current focus node. If a HTML::a tag 1537 * is found and the anchor has a non-javascript url, the HitTestResult type 1538 * is set to SRC_ANCHOR_TYPE and the url is set in the "extra" field. If the 1539 * anchor does not have a url or if it is a javascript url, the type will 1540 * be UNKNOWN_TYPE and the url has to be retrieved through 1541 * {@link #requestFocusNodeHref} asynchronously. If a HTML::img tag is 1542 * found, the HitTestResult type is set to IMAGE_TYPE and the url is set in 1543 * the "extra" field. A type of 1544 * SRC_IMAGE_ANCHOR_TYPE indicates an anchor with a url that has an image as 1545 * a child node. If a phone number is found, the HitTestResult type is set 1546 * to PHONE_TYPE and the phone number is set in the "extra" field of 1547 * HitTestResult. If a map address is found, the HitTestResult type is set 1548 * to GEO_TYPE and the address is set in the "extra" field of HitTestResult. 1549 * If an email address is found, the HitTestResult type is set to EMAIL_TYPE 1550 * and the email is set in the "extra" field of HitTestResult. Otherwise, 1551 * HitTestResult type is set to UNKNOWN_TYPE. 1552 */ 1553 public HitTestResult getHitTestResult() { 1554 if (mNativeClass == 0) { 1555 return null; 1556 } 1557 1558 HitTestResult result = new HitTestResult(); 1559 if (nativeHasCursorNode()) { 1560 if (nativeCursorIsTextInput()) { 1561 result.setType(HitTestResult.EDIT_TEXT_TYPE); 1562 } else { 1563 String text = nativeCursorText(); 1564 if (text != null) { 1565 if (text.startsWith(SCHEME_TEL)) { 1566 result.setType(HitTestResult.PHONE_TYPE); 1567 result.setExtra(text.substring(SCHEME_TEL.length())); 1568 } else if (text.startsWith(SCHEME_MAILTO)) { 1569 result.setType(HitTestResult.EMAIL_TYPE); 1570 result.setExtra(text.substring(SCHEME_MAILTO.length())); 1571 } else if (text.startsWith(SCHEME_GEO)) { 1572 result.setType(HitTestResult.GEO_TYPE); 1573 result.setExtra(URLDecoder.decode(text 1574 .substring(SCHEME_GEO.length()))); 1575 } else if (nativeCursorIsAnchor()) { 1576 result.setType(HitTestResult.SRC_ANCHOR_TYPE); 1577 result.setExtra(text); 1578 } 1579 } 1580 } 1581 } 1582 int type = result.getType(); 1583 if (type == HitTestResult.UNKNOWN_TYPE 1584 || type == HitTestResult.SRC_ANCHOR_TYPE) { 1585 // Now check to see if it is an image. 1586 int contentX = viewToContent((int) mLastTouchX + mScrollX); 1587 int contentY = viewToContent((int) mLastTouchY + mScrollY); 1588 String text = nativeImageURI(contentX, contentY); 1589 if (text != null) { 1590 result.setType(type == HitTestResult.UNKNOWN_TYPE ? 1591 HitTestResult.IMAGE_TYPE : 1592 HitTestResult.SRC_IMAGE_ANCHOR_TYPE); 1593 result.setExtra(text); 1594 } 1595 } 1596 return result; 1597 } 1598 1599 /** 1600 * Request the href of an anchor element due to getFocusNodePath returning 1601 * "href." If hrefMsg is null, this method returns immediately and does not 1602 * dispatch hrefMsg to its target. 1603 * 1604 * @param hrefMsg This message will be dispatched with the result of the 1605 * request as the data member with "url" as key. The result can 1606 * be null. 1607 */ 1608 public void requestFocusNodeHref(Message hrefMsg) { 1609 if (hrefMsg == null || mNativeClass == 0) { 1610 return; 1611 } 1612 if (nativeCursorIsAnchor()) { 1613 // NOTE: We may already have the url of the anchor stored in 1614 // node.mText but it may be out of date or the caller may want 1615 // to know about javascript urls. 1616 mWebViewCore.sendMessage(EventHub.REQUEST_FOCUS_HREF, 1617 nativeCursorFramePointer(), nativeCursorNodePointer(), 1618 hrefMsg); 1619 } 1620 } 1621 1622 /** 1623 * Request the url of the image last touched by the user. msg will be sent 1624 * to its target with a String representing the url as its object. 1625 * 1626 * @param msg This message will be dispatched with the result of the request 1627 * as the data member with "url" as key. The result can be null. 1628 */ 1629 public void requestImageRef(Message msg) { 1630 int contentX = viewToContent((int) mLastTouchX + mScrollX); 1631 int contentY = viewToContent((int) mLastTouchY + mScrollY); 1632 String ref = nativeImageURI(contentX, contentY); 1633 Bundle data = msg.getData(); 1634 data.putString("url", ref); 1635 msg.setData(data); 1636 msg.sendToTarget(); 1637 } 1638 1639 private static int pinLoc(int x, int viewMax, int docMax) { 1640// Log.d(LOGTAG, "-- pinLoc " + x + " " + viewMax + " " + docMax); 1641 if (docMax < viewMax) { // the doc has room on the sides for "blank" 1642 // pin the short document to the top/left of the screen 1643 x = 0; 1644// Log.d(LOGTAG, "--- center " + x); 1645 } else if (x < 0) { 1646 x = 0; 1647// Log.d(LOGTAG, "--- zero"); 1648 } else if (x + viewMax > docMax) { 1649 x = docMax - viewMax; 1650// Log.d(LOGTAG, "--- pin " + x); 1651 } 1652 return x; 1653 } 1654 1655 // Expects x in view coordinates 1656 private int pinLocX(int x) { 1657 return pinLoc(x, getViewWidth(), computeHorizontalScrollRange()); 1658 } 1659 1660 // Expects y in view coordinates 1661 private int pinLocY(int y) { 1662 return pinLoc(y, getViewHeight(), computeVerticalScrollRange()); 1663 } 1664 1665 /*package*/ int viewToContent(int x) { 1666 return Math.round(x * mInvActualScale); 1667 } 1668 1669 private int contentToView(int x) { 1670 return Math.round(x * mActualScale); 1671 } 1672 1673 // Called by JNI to invalidate the View, given rectangle coordinates in 1674 // content space 1675 private void viewInvalidate(int l, int t, int r, int b) { 1676 invalidate(contentToView(l), contentToView(t), contentToView(r), 1677 contentToView(b)); 1678 } 1679 1680 // Called by JNI to invalidate the View after a delay, given rectangle 1681 // coordinates in content space 1682 private void viewInvalidateDelayed(long delay, int l, int t, int r, int b) { 1683 postInvalidateDelayed(delay, contentToView(l), contentToView(t), 1684 contentToView(r), contentToView(b)); 1685 } 1686 1687 private Rect contentToView(Rect x) { 1688 return new Rect(contentToView(x.left), contentToView(x.top) 1689 , contentToView(x.right), contentToView(x.bottom)); 1690 } 1691 1692 /* call from webcoreview.draw(), so we're still executing in the UI thread 1693 */ 1694 private void recordNewContentSize(int w, int h, boolean updateLayout) { 1695 1696 // premature data from webkit, ignore 1697 if ((w | h) == 0) { 1698 return; 1699 } 1700 1701 // don't abort a scroll animation if we didn't change anything 1702 if (mContentWidth != w || mContentHeight != h) { 1703 // record new dimensions 1704 mContentWidth = w; 1705 mContentHeight = h; 1706 // If history Picture is drawn, don't update scroll. They will be 1707 // updated when we get out of that mode. 1708 if (!mDrawHistory) { 1709 // repin our scroll, taking into account the new content size 1710 int oldX = mScrollX; 1711 int oldY = mScrollY; 1712 mScrollX = pinLocX(mScrollX); 1713 mScrollY = pinLocY(mScrollY); 1714 // android.util.Log.d("skia", "recordNewContentSize - 1715 // abortAnimation"); 1716 mScroller.abortAnimation(); // just in case 1717 if (oldX != mScrollX || oldY != mScrollY) { 1718 sendOurVisibleRect(); 1719 } 1720 } 1721 } 1722 contentSizeChanged(updateLayout); 1723 } 1724 1725 private void setNewZoomScale(float scale, boolean force) { 1726 if (scale < mMinZoomScale) { 1727 scale = mMinZoomScale; 1728 } else if (scale > mMaxZoomScale) { 1729 scale = mMaxZoomScale; 1730 } 1731 if (scale != mActualScale || force) { 1732 if (mDrawHistory) { 1733 // If history Picture is drawn, don't update scroll. They will 1734 // be updated when we get out of that mode. 1735 if (scale != mActualScale && !mPreviewZoomOnly) { 1736 mCallbackProxy.onScaleChanged(mActualScale, scale); 1737 } 1738 mActualScale = scale; 1739 mInvActualScale = 1 / scale; 1740 if (!mPreviewZoomOnly) { 1741 sendViewSizeZoom(); 1742 } 1743 } else { 1744 // update our scroll so we don't appear to jump 1745 // i.e. keep the center of the doc in the center of the view 1746 1747 int oldX = mScrollX; 1748 int oldY = mScrollY; 1749 float ratio = scale * mInvActualScale; // old inverse 1750 float sx = ratio * oldX + (ratio - 1) * mZoomCenterX; 1751 float sy = ratio * oldY + (ratio - 1) * mZoomCenterY; 1752 1753 // now update our new scale and inverse 1754 if (scale != mActualScale && !mPreviewZoomOnly) { 1755 mCallbackProxy.onScaleChanged(mActualScale, scale); 1756 } 1757 mActualScale = scale; 1758 mInvActualScale = 1 / scale; 1759 1760 // as we don't have animation for scaling, don't do animation 1761 // for scrolling, as it causes weird intermediate state 1762 // pinScrollTo(Math.round(sx), Math.round(sy)); 1763 mScrollX = pinLocX(Math.round(sx)); 1764 mScrollY = pinLocY(Math.round(sy)); 1765 1766 if (!mPreviewZoomOnly) { 1767 sendViewSizeZoom(); 1768 sendOurVisibleRect(); 1769 } 1770 } 1771 } 1772 } 1773 1774 // Used to avoid sending many visible rect messages. 1775 private Rect mLastVisibleRectSent; 1776 private Rect mLastGlobalRect; 1777 1778 private Rect sendOurVisibleRect() { 1779 Rect rect = new Rect(); 1780 calcOurContentVisibleRect(rect); 1781 if (mFindIsUp) { 1782 rect.bottom -= viewToContent(FIND_HEIGHT); 1783 } 1784 // Rect.equals() checks for null input. 1785 if (!rect.equals(mLastVisibleRectSent)) { 1786 mWebViewCore.sendMessage(EventHub.SET_SCROLL_OFFSET, 1787 rect.left, rect.top); 1788 mLastVisibleRectSent = rect; 1789 } 1790 Rect globalRect = new Rect(); 1791 if (getGlobalVisibleRect(globalRect) 1792 && !globalRect.equals(mLastGlobalRect)) { 1793 // TODO: the global offset is only used by windowRect() 1794 // in ChromeClientAndroid ; other clients such as touch 1795 // and mouse events could return view + screen relative points. 1796 mWebViewCore.sendMessage(EventHub.SET_GLOBAL_BOUNDS, globalRect); 1797 mLastGlobalRect = globalRect; 1798 } 1799 return rect; 1800 } 1801 1802 // Sets r to be the visible rectangle of our webview in view coordinates 1803 private void calcOurVisibleRect(Rect r) { 1804 Point p = new Point(); 1805 getGlobalVisibleRect(r, p); 1806 r.offset(-p.x, -p.y); 1807 } 1808 1809 // Sets r to be our visible rectangle in content coordinates 1810 private void calcOurContentVisibleRect(Rect r) { 1811 calcOurVisibleRect(r); 1812 r.left = viewToContent(r.left); 1813 r.top = viewToContent(r.top); 1814 r.right = viewToContent(r.right); 1815 r.bottom = viewToContent(r.bottom); 1816 } 1817 1818 /** 1819 * Compute unzoomed width and height, and if they differ from the last 1820 * values we sent, send them to webkit (to be used has new viewport) 1821 * 1822 * @return true if new values were sent 1823 */ 1824 private boolean sendViewSizeZoom() { 1825 int newWidth = Math.round(getViewWidth() * mInvActualScale); 1826 int newHeight = Math.round(getViewHeight() * mInvActualScale); 1827 /* 1828 * Because the native side may have already done a layout before the 1829 * View system was able to measure us, we have to send a height of 0 to 1830 * remove excess whitespace when we grow our width. This will trigger a 1831 * layout and a change in content size. This content size change will 1832 * mean that contentSizeChanged will either call this method directly or 1833 * indirectly from onSizeChanged. 1834 */ 1835 if (newWidth > mLastWidthSent && mWrapContent) { 1836 newHeight = 0; 1837 } 1838 // Avoid sending another message if the dimensions have not changed. 1839 if (newWidth != mLastWidthSent || newHeight != mLastHeightSent) { 1840 mWebViewCore.sendMessage(EventHub.VIEW_SIZE_CHANGED, 1841 newWidth, newHeight, new Float(mActualScale)); 1842 mLastWidthSent = newWidth; 1843 mLastHeightSent = newHeight; 1844 return true; 1845 } 1846 return false; 1847 } 1848 1849 @Override 1850 protected int computeHorizontalScrollRange() { 1851 if (mDrawHistory) { 1852 return mHistoryWidth; 1853 } else { 1854 return contentToView(mContentWidth); 1855 } 1856 } 1857 1858 // Make sure this stays in sync with the actual height of the FindDialog. 1859 private static final int FIND_HEIGHT = 79; 1860 1861 @Override 1862 protected int computeVerticalScrollRange() { 1863 if (mDrawHistory) { 1864 return mHistoryHeight; 1865 } else { 1866 int height = contentToView(mContentHeight); 1867 if (mFindIsUp) { 1868 height += FIND_HEIGHT; 1869 } 1870 return height; 1871 } 1872 } 1873 1874 /** 1875 * Get the url for the current page. This is not always the same as the url 1876 * passed to WebViewClient.onPageStarted because although the load for 1877 * that url has begun, the current page may not have changed. 1878 * @return The url for the current page. 1879 */ 1880 public String getUrl() { 1881 WebHistoryItem h = mCallbackProxy.getBackForwardList().getCurrentItem(); 1882 return h != null ? h.getUrl() : null; 1883 } 1884 1885 /** 1886 * Get the original url for the current page. This is not always the same 1887 * as the url passed to WebViewClient.onPageStarted because although the 1888 * load for that url has begun, the current page may not have changed. 1889 * Also, there may have been redirects resulting in a different url to that 1890 * originally requested. 1891 * @return The url that was originally requested for the current page. 1892 */ 1893 public String getOriginalUrl() { 1894 WebHistoryItem h = mCallbackProxy.getBackForwardList().getCurrentItem(); 1895 return h != null ? h.getOriginalUrl() : null; 1896 } 1897 1898 /** 1899 * Get the title for the current page. This is the title of the current page 1900 * until WebViewClient.onReceivedTitle is called. 1901 * @return The title for the current page. 1902 */ 1903 public String getTitle() { 1904 WebHistoryItem h = mCallbackProxy.getBackForwardList().getCurrentItem(); 1905 return h != null ? h.getTitle() : null; 1906 } 1907 1908 /** 1909 * Get the favicon for the current page. This is the favicon of the current 1910 * page until WebViewClient.onReceivedIcon is called. 1911 * @return The favicon for the current page. 1912 */ 1913 public Bitmap getFavicon() { 1914 WebHistoryItem h = mCallbackProxy.getBackForwardList().getCurrentItem(); 1915 return h != null ? h.getFavicon() : null; 1916 } 1917 1918 /** 1919 * Get the progress for the current page. 1920 * @return The progress for the current page between 0 and 100. 1921 */ 1922 public int getProgress() { 1923 return mCallbackProxy.getProgress(); 1924 } 1925 1926 /** 1927 * @return the height of the HTML content. 1928 */ 1929 public int getContentHeight() { 1930 return mContentHeight; 1931 } 1932 1933 /** 1934 * Pause all layout, parsing, and javascript timers for all webviews. This 1935 * is a global requests, not restricted to just this webview. This can be 1936 * useful if the application has been paused. 1937 */ 1938 public void pauseTimers() { 1939 mWebViewCore.sendMessage(EventHub.PAUSE_TIMERS); 1940 } 1941 1942 /** 1943 * Resume all layout, parsing, and javascript timers for all webviews. 1944 * This will resume dispatching all timers. 1945 */ 1946 public void resumeTimers() { 1947 mWebViewCore.sendMessage(EventHub.RESUME_TIMERS); 1948 } 1949 1950 /** 1951 * Call this to pause any extra processing associated with this view and 1952 * its associated DOM/plugins/javascript/etc. For example, if the view is 1953 * taken offscreen, this could be called to reduce unnecessary CPU and/or 1954 * network traffic. When the view is again "active", call onResume(). 1955 * 1956 * Note that this differs from pauseTimers(), which affects all views/DOMs 1957 * @hide 1958 */ 1959 public void onPause() { 1960 if (!mIsPaused) { 1961 mIsPaused = true; 1962 mWebViewCore.sendMessage(EventHub.ON_PAUSE); 1963 } 1964 } 1965 1966 /** 1967 * Call this to balanace a previous call to onPause() 1968 * @hide 1969 */ 1970 public void onResume() { 1971 if (mIsPaused) { 1972 mIsPaused = false; 1973 mWebViewCore.sendMessage(EventHub.ON_RESUME); 1974 } 1975 } 1976 1977 /** 1978 * Returns true if the view is paused, meaning onPause() was called. Calling 1979 * onResume() sets the paused state back to false. 1980 * @hide 1981 */ 1982 public boolean isPaused() { 1983 return mIsPaused; 1984 } 1985 1986 /** 1987 * Clear the resource cache. Note that the cache is per-application, so 1988 * this will clear the cache for all WebViews used. 1989 * 1990 * @param includeDiskFiles If false, only the RAM cache is cleared. 1991 */ 1992 public void clearCache(boolean includeDiskFiles) { 1993 // Note: this really needs to be a static method as it clears cache for all 1994 // WebView. But we need mWebViewCore to send message to WebCore thread, so 1995 // we can't make this static. 1996 mWebViewCore.sendMessage(EventHub.CLEAR_CACHE, 1997 includeDiskFiles ? 1 : 0, 0); 1998 } 1999 2000 /** 2001 * Make sure that clearing the form data removes the adapter from the 2002 * currently focused textfield if there is one. 2003 */ 2004 public void clearFormData() { 2005 if (inEditingMode()) { 2006 AutoCompleteAdapter adapter = null; 2007 mTextEntry.setAdapterCustom(adapter); 2008 } 2009 } 2010 2011 /** 2012 * Tell the WebView to clear its internal back/forward list. 2013 */ 2014 public void clearHistory() { 2015 mCallbackProxy.getBackForwardList().setClearPending(); 2016 mWebViewCore.sendMessage(EventHub.CLEAR_HISTORY); 2017 } 2018 2019 /** 2020 * Clear the SSL preferences table stored in response to proceeding with SSL 2021 * certificate errors. 2022 */ 2023 public void clearSslPreferences() { 2024 mWebViewCore.sendMessage(EventHub.CLEAR_SSL_PREF_TABLE); 2025 } 2026 2027 /** 2028 * Return the WebBackForwardList for this WebView. This contains the 2029 * back/forward list for use in querying each item in the history stack. 2030 * This is a copy of the private WebBackForwardList so it contains only a 2031 * snapshot of the current state. Multiple calls to this method may return 2032 * different objects. The object returned from this method will not be 2033 * updated to reflect any new state. 2034 */ 2035 public WebBackForwardList copyBackForwardList() { 2036 return mCallbackProxy.getBackForwardList().clone(); 2037 } 2038 2039 /* 2040 * Highlight and scroll to the next occurance of String in findAll. 2041 * Wraps the page infinitely, and scrolls. Must be called after 2042 * calling findAll. 2043 * 2044 * @param forward Direction to search. 2045 */ 2046 public void findNext(boolean forward) { 2047 nativeFindNext(forward); 2048 } 2049 2050 /* 2051 * Find all instances of find on the page and highlight them. 2052 * @param find String to find. 2053 * @return int The number of occurances of the String "find" 2054 * that were found. 2055 */ 2056 public int findAll(String find) { 2057 mFindIsUp = true; 2058 int result = nativeFindAll(find.toLowerCase(), find.toUpperCase()); 2059 invalidate(); 2060 return result; 2061 } 2062 2063 // Used to know whether the find dialog is open. Affects whether 2064 // or not we draw the highlights for matches. 2065 private boolean mFindIsUp; 2066 2067 /** 2068 * Return the first substring consisting of the address of a physical 2069 * location. Currently, only addresses in the United States are detected, 2070 * and consist of: 2071 * - a house number 2072 * - a street name 2073 * - a street type (Road, Circle, etc), either spelled out or abbreviated 2074 * - a city name 2075 * - a state or territory, either spelled out or two-letter abbr. 2076 * - an optional 5 digit or 9 digit zip code. 2077 * 2078 * All names must be correctly capitalized, and the zip code, if present, 2079 * must be valid for the state. The street type must be a standard USPS 2080 * spelling or abbreviation. The state or territory must also be spelled 2081 * or abbreviated using USPS standards. The house number may not exceed 2082 * five digits. 2083 * @param addr The string to search for addresses. 2084 * 2085 * @return the address, or if no address is found, return null. 2086 */ 2087 public static String findAddress(String addr) { 2088 return WebViewCore.nativeFindAddress(addr); 2089 } 2090 2091 /* 2092 * Clear the highlighting surrounding text matches created by findAll. 2093 */ 2094 public void clearMatches() { 2095 mFindIsUp = false; 2096 nativeSetFindIsDown(); 2097 // Now that the dialog has been removed, ensure that we scroll to a 2098 // location that is not beyond the end of the page. 2099 pinScrollTo(mScrollX, mScrollY, false, 0); 2100 invalidate(); 2101 } 2102 2103 /** 2104 * Query the document to see if it contains any image references. The 2105 * message object will be dispatched with arg1 being set to 1 if images 2106 * were found and 0 if the document does not reference any images. 2107 * @param response The message that will be dispatched with the result. 2108 */ 2109 public void documentHasImages(Message response) { 2110 if (response == null) { 2111 return; 2112 } 2113 mWebViewCore.sendMessage(EventHub.DOC_HAS_IMAGES, response); 2114 } 2115 2116 @Override 2117 public void computeScroll() { 2118 if (mScroller.computeScrollOffset()) { 2119 int oldX = mScrollX; 2120 int oldY = mScrollY; 2121 mScrollX = mScroller.getCurrX(); 2122 mScrollY = mScroller.getCurrY(); 2123 postInvalidate(); // So we draw again 2124 if (oldX != mScrollX || oldY != mScrollY) { 2125 // as onScrollChanged() is not called, sendOurVisibleRect() 2126 // needs to be call explicitly 2127 sendOurVisibleRect(); 2128 } 2129 } else { 2130 super.computeScroll(); 2131 } 2132 } 2133 2134 private static int computeDuration(int dx, int dy) { 2135 int distance = Math.max(Math.abs(dx), Math.abs(dy)); 2136 int duration = distance * 1000 / STD_SPEED; 2137 return Math.min(duration, MAX_DURATION); 2138 } 2139 2140 // helper to pin the scrollBy parameters (already in view coordinates) 2141 // returns true if the scroll was changed 2142 private boolean pinScrollBy(int dx, int dy, boolean animate, int animationDuration) { 2143 return pinScrollTo(mScrollX + dx, mScrollY + dy, animate, animationDuration); 2144 } 2145 2146 // helper to pin the scrollTo parameters (already in view coordinates) 2147 // returns true if the scroll was changed 2148 private boolean pinScrollTo(int x, int y, boolean animate, int animationDuration) { 2149 x = pinLocX(x); 2150 y = pinLocY(y); 2151 int dx = x - mScrollX; 2152 int dy = y - mScrollY; 2153 2154 if ((dx | dy) == 0) { 2155 return false; 2156 } 2157 2158 if (true && animate) { 2159 // Log.d(LOGTAG, "startScroll: " + dx + " " + dy); 2160 2161 mScroller.startScroll(mScrollX, mScrollY, dx, dy, 2162 animationDuration > 0 ? animationDuration : computeDuration(dx, dy)); 2163 invalidate(); 2164 } else { 2165 mScroller.abortAnimation(); // just in case 2166 scrollTo(x, y); 2167 } 2168 return true; 2169 } 2170 2171 // Scale from content to view coordinates, and pin. 2172 // Also called by jni webview.cpp 2173 private void setContentScrollBy(int cx, int cy, boolean animate) { 2174 if (mDrawHistory) { 2175 // disallow WebView to change the scroll position as History Picture 2176 // is used in the view system. 2177 // TODO: as we switchOutDrawHistory when trackball or navigation 2178 // keys are hit, this should be safe. Right? 2179 return; 2180 } 2181 cx = contentToView(cx); 2182 cy = contentToView(cy); 2183 if (mHeightCanMeasure) { 2184 // move our visible rect according to scroll request 2185 if (cy != 0) { 2186 Rect tempRect = new Rect(); 2187 calcOurVisibleRect(tempRect); 2188 tempRect.offset(cx, cy); 2189 requestRectangleOnScreen(tempRect); 2190 } 2191 // FIXME: We scroll horizontally no matter what because currently 2192 // ScrollView and ListView will not scroll horizontally. 2193 // FIXME: Why do we only scroll horizontally if there is no 2194 // vertical scroll? 2195// Log.d(LOGTAG, "setContentScrollBy cy=" + cy); 2196 if (cy == 0 && cx != 0) { 2197 pinScrollBy(cx, 0, animate, 0); 2198 } 2199 } else { 2200 pinScrollBy(cx, cy, animate, 0); 2201 } 2202 } 2203 2204 // scale from content to view coordinates, and pin 2205 // return true if pin caused the final x/y different than the request cx/cy; 2206 // return false if the view scroll to the exact position as it is requested. 2207 private boolean setContentScrollTo(int cx, int cy) { 2208 if (mDrawHistory) { 2209 // disallow WebView to change the scroll position as History Picture 2210 // is used in the view system. 2211 // One known case where this is called is that WebCore tries to 2212 // restore the scroll position. As history Picture already uses the 2213 // saved scroll position, it is ok to skip this. 2214 return false; 2215 } 2216 int vx = contentToView(cx); 2217 int vy = contentToView(cy); 2218// Log.d(LOGTAG, "content scrollTo [" + cx + " " + cy + "] view=[" + 2219// vx + " " + vy + "]"); 2220 pinScrollTo(vx, vy, false, 0); 2221 if (mScrollX != vx || mScrollY != vy) { 2222 return true; 2223 } else { 2224 return false; 2225 } 2226 } 2227 2228 // scale from content to view coordinates, and pin 2229 private void spawnContentScrollTo(int cx, int cy) { 2230 if (mDrawHistory) { 2231 // disallow WebView to change the scroll position as History Picture 2232 // is used in the view system. 2233 return; 2234 } 2235 int vx = contentToView(cx); 2236 int vy = contentToView(cy); 2237 pinScrollTo(vx, vy, true, 0); 2238 } 2239 2240 /** 2241 * These are from webkit, and are in content coordinate system (unzoomed) 2242 */ 2243 private void contentSizeChanged(boolean updateLayout) { 2244 // suppress 0,0 since we usually see real dimensions soon after 2245 // this avoids drawing the prev content in a funny place. If we find a 2246 // way to consolidate these notifications, this check may become 2247 // obsolete 2248 if ((mContentWidth | mContentHeight) == 0) { 2249 return; 2250 } 2251 2252 if (mHeightCanMeasure) { 2253 if (getMeasuredHeight() != contentToView(mContentHeight) 2254 && updateLayout) { 2255 requestLayout(); 2256 } 2257 } else if (mWidthCanMeasure) { 2258 if (getMeasuredWidth() != contentToView(mContentWidth) 2259 && updateLayout) { 2260 requestLayout(); 2261 } 2262 } else { 2263 // If we don't request a layout, try to send our view size to the 2264 // native side to ensure that WebCore has the correct dimensions. 2265 sendViewSizeZoom(); 2266 } 2267 } 2268 2269 /** 2270 * Set the WebViewClient that will receive various notifications and 2271 * requests. This will replace the current handler. 2272 * @param client An implementation of WebViewClient. 2273 */ 2274 public void setWebViewClient(WebViewClient client) { 2275 mCallbackProxy.setWebViewClient(client); 2276 } 2277 2278 /** 2279 * Register the interface to be used when content can not be handled by 2280 * the rendering engine, and should be downloaded instead. This will replace 2281 * the current handler. 2282 * @param listener An implementation of DownloadListener. 2283 */ 2284 public void setDownloadListener(DownloadListener listener) { 2285 mCallbackProxy.setDownloadListener(listener); 2286 } 2287 2288 /** 2289 * Set the chrome handler. This is an implementation of WebChromeClient for 2290 * use in handling Javascript dialogs, favicons, titles, and the progress. 2291 * This will replace the current handler. 2292 * @param client An implementation of WebChromeClient. 2293 */ 2294 public void setWebChromeClient(WebChromeClient client) { 2295 mCallbackProxy.setWebChromeClient(client); 2296 } 2297 2298 /** 2299 * Set the Picture listener. This is an interface used to receive 2300 * notifications of a new Picture. 2301 * @param listener An implementation of WebView.PictureListener. 2302 */ 2303 public void setPictureListener(PictureListener listener) { 2304 mPictureListener = listener; 2305 } 2306 2307 /** 2308 * {@hide} 2309 */ 2310 /* FIXME: Debug only! Remove for SDK! */ 2311 public void externalRepresentation(Message callback) { 2312 mWebViewCore.sendMessage(EventHub.REQUEST_EXT_REPRESENTATION, callback); 2313 } 2314 2315 /** 2316 * {@hide} 2317 */ 2318 /* FIXME: Debug only! Remove for SDK! */ 2319 public void documentAsText(Message callback) { 2320 mWebViewCore.sendMessage(EventHub.REQUEST_DOC_AS_TEXT, callback); 2321 } 2322 2323 /** 2324 * Use this function to bind an object to Javascript so that the 2325 * methods can be accessed from Javascript. 2326 * <p><strong>IMPORTANT:</strong> 2327 * <ul> 2328 * <li> Using addJavascriptInterface() allows JavaScript to control your 2329 * application. This can be a very useful feature or a dangerous security 2330 * issue. When the HTML in the WebView is untrustworthy (for example, part 2331 * or all of the HTML is provided by some person or process), then an 2332 * attacker could inject HTML that will execute your code and possibly any 2333 * code of the attacker's choosing.<br> 2334 * Do not use addJavascriptInterface() unless all of the HTML in this 2335 * WebView was written by you.</li> 2336 * <li> The Java object that is bound runs in another thread and not in 2337 * the thread that it was constructed in.</li> 2338 * </ul></p> 2339 * @param obj The class instance to bind to Javascript 2340 * @param interfaceName The name to used to expose the class in Javascript 2341 */ 2342 public void addJavascriptInterface(Object obj, String interfaceName) { 2343 // Use Hashmap rather than Bundle as Bundles can't cope with Objects 2344 HashMap arg = new HashMap(); 2345 arg.put("object", obj); 2346 arg.put("interfaceName", interfaceName); 2347 mWebViewCore.sendMessage(EventHub.ADD_JS_INTERFACE, arg); 2348 } 2349 2350 /** 2351 * Return the WebSettings object used to control the settings for this 2352 * WebView. 2353 * @return A WebSettings object that can be used to control this WebView's 2354 * settings. 2355 */ 2356 public WebSettings getSettings() { 2357 return mWebViewCore.getSettings(); 2358 } 2359 2360 /** 2361 * Return the list of currently loaded plugins. 2362 * @return The list of currently loaded plugins. 2363 */ 2364 public static synchronized PluginList getPluginList() { 2365 if (sPluginList == null) { 2366 sPluginList = new PluginList(); 2367 } 2368 return sPluginList; 2369 } 2370 2371 /** 2372 * TODO: need to add @Deprecated 2373 */ 2374 public void refreshPlugins(boolean reloadOpenPages) { 2375 PluginManager.getInstance(mContext).refreshPlugins(reloadOpenPages); 2376 } 2377 2378 //------------------------------------------------------------------------- 2379 // Override View methods 2380 //------------------------------------------------------------------------- 2381 2382 @Override 2383 protected void finalize() throws Throwable { 2384 destroy(); 2385 } 2386 2387 @Override 2388 protected void onDraw(Canvas canvas) { 2389 // if mNativeClass is 0, the WebView has been destroyed. Do nothing. 2390 if (mNativeClass == 0) { 2391 return; 2392 } 2393 if (mWebViewCore.mEndScaleZoom) { 2394 mWebViewCore.mEndScaleZoom = false; 2395 if (mTouchMode >= FIRST_SCROLL_ZOOM 2396 && mTouchMode <= LAST_SCROLL_ZOOM) { 2397 setHorizontalScrollBarEnabled(true); 2398 setVerticalScrollBarEnabled(true); 2399 mTouchMode = TOUCH_DONE_MODE; 2400 } 2401 } 2402 int sc = canvas.save(); 2403 if (mTouchMode >= FIRST_SCROLL_ZOOM && mTouchMode <= LAST_SCROLL_ZOOM) { 2404 scrollZoomDraw(canvas); 2405 } else { 2406 nativeRecomputeFocus(); 2407 // Update the buttons in the picture, so when we draw the picture 2408 // to the screen, they are in the correct state. 2409 // Tell the native side if user is a) touching the screen, 2410 // b) pressing the trackball down, or c) pressing the enter key 2411 // If the focus is a button, we need to draw it in the pressed 2412 // state. 2413 // If mNativeClass is 0, we should not reach here, so we do not 2414 // need to check it again. 2415 nativeRecordButtons(hasFocus() && hasWindowFocus(), 2416 mTouchMode == TOUCH_SHORTPRESS_START_MODE 2417 || mTrackballDown || mGotEnterDown, false); 2418 drawCoreAndCursorRing(canvas, mBackgroundColor, mDrawCursorRing); 2419 } 2420 canvas.restoreToCount(sc); 2421 2422 if (AUTO_REDRAW_HACK && mAutoRedraw) { 2423 invalidate(); 2424 } 2425 } 2426 2427 @Override 2428 public void setLayoutParams(ViewGroup.LayoutParams params) { 2429 if (params.height == LayoutParams.WRAP_CONTENT) { 2430 mWrapContent = true; 2431 } 2432 super.setLayoutParams(params); 2433 } 2434 2435 @Override 2436 public boolean performLongClick() { 2437 if (inEditingMode()) { 2438 return mTextEntry.performLongClick(); 2439 } else { 2440 return super.performLongClick(); 2441 } 2442 } 2443 2444 private void drawCoreAndCursorRing(Canvas canvas, int color, 2445 boolean drawFocus) { 2446 if (mDrawHistory) { 2447 canvas.scale(mActualScale, mActualScale); 2448 canvas.drawPicture(mHistoryPicture); 2449 return; 2450 } 2451 2452 boolean animateZoom = mZoomScale != 0; 2453 boolean animateScroll = !mScroller.isFinished() 2454 || mVelocityTracker != null; 2455 if (animateZoom) { 2456 float zoomScale; 2457 int interval = (int) (SystemClock.uptimeMillis() - mZoomStart); 2458 if (interval < ZOOM_ANIMATION_LENGTH) { 2459 float ratio = (float) interval / ZOOM_ANIMATION_LENGTH; 2460 zoomScale = 1.0f / (mInvInitialZoomScale 2461 + (mInvFinalZoomScale - mInvInitialZoomScale) * ratio); 2462 invalidate(); 2463 } else { 2464 zoomScale = mZoomScale; 2465 // set mZoomScale to be 0 as we have done animation 2466 mZoomScale = 0; 2467 } 2468 float scale = (mActualScale - zoomScale) * mInvActualScale; 2469 float tx = scale * (mZoomCenterX + mScrollX); 2470 float ty = scale * (mZoomCenterY + mScrollY); 2471 2472 // this block pins the translate to "legal" bounds. This makes the 2473 // animation a bit non-obvious, but it means we won't pop when the 2474 // "real" zoom takes effect 2475 if (true) { 2476 // canvas.translate(mScrollX, mScrollY); 2477 tx -= mScrollX; 2478 ty -= mScrollY; 2479 tx = -pinLoc(-Math.round(tx), getViewWidth(), Math 2480 .round(mContentWidth * zoomScale)); 2481 ty = -pinLoc(-Math.round(ty), getViewHeight(), Math 2482 .round(mContentHeight * zoomScale)); 2483 tx += mScrollX; 2484 ty += mScrollY; 2485 } 2486 canvas.translate(tx, ty); 2487 canvas.scale(zoomScale, zoomScale); 2488 } else { 2489 canvas.scale(mActualScale, mActualScale); 2490 } 2491 2492 mWebViewCore.drawContentPicture(canvas, color, animateZoom, 2493 animateScroll); 2494 2495 if (mNativeClass == 0) return; 2496 if (mShiftIsPressed) { 2497 if (mTouchSelection) { 2498 nativeDrawSelectionRegion(canvas); 2499 } else { 2500 nativeDrawSelection(canvas, mSelectX, mSelectY, 2501 mExtendSelection); 2502 } 2503 } else if (drawFocus) { 2504 if (mTouchMode == TOUCH_SHORTPRESS_START_MODE) { 2505 mTouchMode = TOUCH_SHORTPRESS_MODE; 2506 HitTestResult hitTest = getHitTestResult(); 2507 if (hitTest != null && 2508 hitTest.mType != HitTestResult.UNKNOWN_TYPE) { 2509 mPrivateHandler.sendMessageDelayed(mPrivateHandler 2510 .obtainMessage(SWITCH_TO_LONGPRESS), 2511 LONG_PRESS_TIMEOUT); 2512 } 2513 } 2514 nativeDrawCursorRing(canvas); 2515 } 2516 // When the FindDialog is up, only draw the matches if we are not in 2517 // the process of scrolling them into view. 2518 if (mFindIsUp && !animateScroll) { 2519 nativeDrawMatches(canvas); 2520 } 2521 } 2522 2523 private float scrollZoomGridScale(float invScale) { 2524 float griddedInvScale = (int) (invScale * SCROLL_ZOOM_GRID) 2525 / (float) SCROLL_ZOOM_GRID; 2526 return 1.0f / griddedInvScale; 2527 } 2528 2529 private float scrollZoomX(float scale) { 2530 int width = getViewWidth(); 2531 float maxScrollZoomX = mContentWidth * scale - width; 2532 int maxX = mContentWidth - width; 2533 return -(maxScrollZoomX > 0 ? mZoomScrollX * maxScrollZoomX / maxX 2534 : maxScrollZoomX / 2); 2535 } 2536 2537 private float scrollZoomY(float scale) { 2538 int height = getViewHeight(); 2539 float maxScrollZoomY = mContentHeight * scale - height; 2540 int maxY = mContentHeight - height; 2541 return -(maxScrollZoomY > 0 ? mZoomScrollY * maxScrollZoomY / maxY 2542 : maxScrollZoomY / 2); 2543 } 2544 2545 private void drawMagnifyFrame(Canvas canvas, Rect frame, Paint paint) { 2546 final float ADORNMENT_LEN = 16.0f; 2547 float width = frame.width(); 2548 float height = frame.height(); 2549 Path path = new Path(); 2550 path.moveTo(-ADORNMENT_LEN, -ADORNMENT_LEN); 2551 path.lineTo(0, 0); 2552 path.lineTo(width, 0); 2553 path.lineTo(width + ADORNMENT_LEN, -ADORNMENT_LEN); 2554 path.moveTo(-ADORNMENT_LEN, height + ADORNMENT_LEN); 2555 path.lineTo(0, height); 2556 path.lineTo(width, height); 2557 path.lineTo(width + ADORNMENT_LEN, height + ADORNMENT_LEN); 2558 path.moveTo(0, 0); 2559 path.lineTo(0, height); 2560 path.moveTo(width, 0); 2561 path.lineTo(width, height); 2562 path.offset(frame.left, frame.top); 2563 canvas.drawPath(path, paint); 2564 } 2565 2566 // Returns frame surrounding magified portion of screen while 2567 // scroll-zoom is enabled. The frame is also used to center the 2568 // zoom-in zoom-out points at the start and end of the animation. 2569 private Rect scrollZoomFrame(int width, int height, float halfScale) { 2570 Rect scrollFrame = new Rect(); 2571 scrollFrame.set(mZoomScrollX, mZoomScrollY, 2572 mZoomScrollX + width, mZoomScrollY + height); 2573 if (mContentWidth * mZoomScrollLimit < width) { 2574 float scale = zoomFrameScaleX(width, halfScale, 1.0f); 2575 float offsetX = (width * scale - width) * 0.5f; 2576 scrollFrame.left -= offsetX; 2577 scrollFrame.right += offsetX; 2578 } 2579 if (mContentHeight * mZoomScrollLimit < height) { 2580 float scale = zoomFrameScaleY(height, halfScale, 1.0f); 2581 float offsetY = (height * scale - height) * 0.5f; 2582 scrollFrame.top -= offsetY; 2583 scrollFrame.bottom += offsetY; 2584 } 2585 return scrollFrame; 2586 } 2587 2588 private float zoomFrameScaleX(int width, float halfScale, float noScale) { 2589 // mContentWidth > width > mContentWidth * mZoomScrollLimit 2590 if (mContentWidth <= width) { 2591 return halfScale; 2592 } 2593 float part = (width - mContentWidth * mZoomScrollLimit) 2594 / (width * (1 - mZoomScrollLimit)); 2595 return halfScale * part + noScale * (1.0f - part); 2596 } 2597 2598 private float zoomFrameScaleY(int height, float halfScale, float noScale) { 2599 if (mContentHeight <= height) { 2600 return halfScale; 2601 } 2602 float part = (height - mContentHeight * mZoomScrollLimit) 2603 / (height * (1 - mZoomScrollLimit)); 2604 return halfScale * part + noScale * (1.0f - part); 2605 } 2606 2607 private float scrollZoomMagScale(float invScale) { 2608 return (invScale * 2 + mInvActualScale) / 3; 2609 } 2610 2611 private void scrollZoomDraw(Canvas canvas) { 2612 float invScale = mZoomScrollInvLimit; 2613 int elapsed = 0; 2614 if (mTouchMode != SCROLL_ZOOM_OUT) { 2615 elapsed = (int) Math.min(System.currentTimeMillis() 2616 - mZoomScrollStart, SCROLL_ZOOM_DURATION); 2617 float transitionScale = (mZoomScrollInvLimit - mInvActualScale) 2618 * elapsed / SCROLL_ZOOM_DURATION; 2619 if (mTouchMode == SCROLL_ZOOM_ANIMATION_OUT) { 2620 invScale = mInvActualScale + transitionScale; 2621 } else { /* if (mTouchMode == SCROLL_ZOOM_ANIMATION_IN) */ 2622 invScale = mZoomScrollInvLimit - transitionScale; 2623 } 2624 } 2625 float scale = scrollZoomGridScale(invScale); 2626 invScale = 1.0f / scale; 2627 int width = getViewWidth(); 2628 int height = getViewHeight(); 2629 float halfScale = scrollZoomMagScale(invScale); 2630 Rect scrollFrame = scrollZoomFrame(width, height, halfScale); 2631 if (elapsed == SCROLL_ZOOM_DURATION) { 2632 if (mTouchMode == SCROLL_ZOOM_ANIMATION_IN) { 2633 setHorizontalScrollBarEnabled(true); 2634 setVerticalScrollBarEnabled(true); 2635 updateTextEntry(); 2636 scrollTo((int) (scrollFrame.centerX() * mActualScale) 2637 - (width >> 1), (int) (scrollFrame.centerY() 2638 * mActualScale) - (height >> 1)); 2639 mTouchMode = TOUCH_DONE_MODE; 2640 } else { 2641 mTouchMode = SCROLL_ZOOM_OUT; 2642 } 2643 } 2644 float newX = scrollZoomX(scale); 2645 float newY = scrollZoomY(scale); 2646 if (LOGV_ENABLED) { 2647 Log.v(LOGTAG, "scrollZoomDraw scale=" + scale + " + (" + newX 2648 + ", " + newY + ") mZoomScroll=(" + mZoomScrollX + ", " 2649 + mZoomScrollY + ")" + " invScale=" + invScale + " scale=" 2650 + scale); 2651 } 2652 canvas.translate(newX, newY); 2653 canvas.scale(scale, scale); 2654 boolean animating = mTouchMode != SCROLL_ZOOM_OUT; 2655 if (mDrawHistory) { 2656 int sc = canvas.save(Canvas.CLIP_SAVE_FLAG); 2657 Rect clip = new Rect(0, 0, mHistoryPicture.getWidth(), 2658 mHistoryPicture.getHeight()); 2659 canvas.clipRect(clip, Region.Op.DIFFERENCE); 2660 canvas.drawColor(mBackgroundColor); 2661 canvas.restoreToCount(sc); 2662 canvas.drawPicture(mHistoryPicture); 2663 } else { 2664 mWebViewCore.drawContentPicture(canvas, mBackgroundColor, 2665 animating, true); 2666 } 2667 if (mTouchMode == TOUCH_DONE_MODE) { 2668 return; 2669 } 2670 Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG); 2671 paint.setStyle(Paint.Style.STROKE); 2672 paint.setStrokeWidth(30.0f); 2673 paint.setARGB(0x50, 0, 0, 0); 2674 int maxX = mContentWidth - width; 2675 int maxY = mContentHeight - height; 2676 if (true) { // experiment: draw hint to place finger off magnify area 2677 drawMagnifyFrame(canvas, scrollFrame, paint); 2678 } else { 2679 canvas.drawRect(scrollFrame, paint); 2680 } 2681 int sc = canvas.save(); 2682 canvas.clipRect(scrollFrame); 2683 float halfX = (float) mZoomScrollX / maxX; 2684 if (mContentWidth * mZoomScrollLimit < width) { 2685 halfX = zoomFrameScaleX(width, 0.5f, halfX); 2686 } 2687 float halfY = (float) mZoomScrollY / maxY; 2688 if (mContentHeight * mZoomScrollLimit < height) { 2689 halfY = zoomFrameScaleY(height, 0.5f, halfY); 2690 } 2691 canvas.scale(halfScale, halfScale, mZoomScrollX + width * halfX 2692 , mZoomScrollY + height * halfY); 2693 if (LOGV_ENABLED) { 2694 Log.v(LOGTAG, "scrollZoomDraw halfScale=" + halfScale + " w/h=(" 2695 + width + ", " + height + ") half=(" + halfX + ", " 2696 + halfY + ")"); 2697 } 2698 if (mDrawHistory) { 2699 canvas.drawPicture(mHistoryPicture); 2700 } else { 2701 mWebViewCore.drawContentPicture(canvas, mBackgroundColor, 2702 animating, false); 2703 } 2704 canvas.restoreToCount(sc); 2705 if (mTouchMode != SCROLL_ZOOM_OUT) { 2706 invalidate(); 2707 } 2708 } 2709 2710 private void zoomScrollTap(float x, float y) { 2711 float scale = scrollZoomGridScale(mZoomScrollInvLimit); 2712 float left = scrollZoomX(scale); 2713 float top = scrollZoomY(scale); 2714 int width = getViewWidth(); 2715 int height = getViewHeight(); 2716 x -= width * scale / 2; 2717 y -= height * scale / 2; 2718 mZoomScrollX = Math.min(mContentWidth - width 2719 , Math.max(0, (int) ((x - left) / scale))); 2720 mZoomScrollY = Math.min(mContentHeight - height 2721 , Math.max(0, (int) ((y - top) / scale))); 2722 if (LOGV_ENABLED) { 2723 Log.v(LOGTAG, "zoomScrollTap scale=" + scale + " + (" + left 2724 + ", " + top + ") mZoomScroll=(" + mZoomScrollX + ", " 2725 + mZoomScrollY + ")" + " x=" + x + " y=" + y); 2726 } 2727 } 2728 2729 private boolean canZoomScrollOut() { 2730 if (mContentWidth == 0 || mContentHeight == 0) { 2731 return false; 2732 } 2733 int width = getViewWidth(); 2734 int height = getViewHeight(); 2735 float x = (float) width / (float) mContentWidth; 2736 float y = (float) height / (float) mContentHeight; 2737 mZoomScrollLimit = Math.max(DEFAULT_MIN_ZOOM_SCALE, Math.min(x, y)); 2738 mZoomScrollInvLimit = 1.0f / mZoomScrollLimit; 2739 if (LOGV_ENABLED) { 2740 Log.v(LOGTAG, "canZoomScrollOut" 2741 + " mInvActualScale=" + mInvActualScale 2742 + " mZoomScrollLimit=" + mZoomScrollLimit 2743 + " mZoomScrollInvLimit=" + mZoomScrollInvLimit 2744 + " mContentWidth=" + mContentWidth 2745 + " mContentHeight=" + mContentHeight 2746 ); 2747 } 2748 // don't zoom out unless magnify area is at least half as wide 2749 // or tall as content 2750 float limit = mZoomScrollLimit * 2; 2751 return mContentWidth >= width * limit 2752 || mContentHeight >= height * limit; 2753 } 2754 2755 private void startZoomScrollOut() { 2756 setHorizontalScrollBarEnabled(false); 2757 setVerticalScrollBarEnabled(false); 2758 if (getSettings().getBuiltInZoomControls()) { 2759 if (mZoomButtonsController.isVisible()) { 2760 mZoomButtonsController.setVisible(false); 2761 } 2762 } else { 2763 if (mZoomControlRunnable != null) { 2764 mPrivateHandler.removeCallbacks(mZoomControlRunnable); 2765 } 2766 if (mZoomControls != null) { 2767 mZoomControls.hide(); 2768 } 2769 } 2770 int width = getViewWidth(); 2771 int height = getViewHeight(); 2772 int halfW = width >> 1; 2773 mLastTouchX = halfW; 2774 int halfH = height >> 1; 2775 mLastTouchY = halfH; 2776 mScroller.abortAnimation(); 2777 mZoomScrollStart = System.currentTimeMillis(); 2778 Rect zoomFrame = scrollZoomFrame(width, height 2779 , scrollZoomMagScale(mZoomScrollInvLimit)); 2780 mZoomScrollX = Math.max(0, (int) ((mScrollX + halfW) * mInvActualScale) 2781 - (zoomFrame.width() >> 1)); 2782 mZoomScrollY = Math.max(0, (int) ((mScrollY + halfH) * mInvActualScale) 2783 - (zoomFrame.height() >> 1)); 2784 scrollTo(0, 0); // triggers inval, starts animation 2785 clearTextEntry(); 2786 if (LOGV_ENABLED) { 2787 Log.v(LOGTAG, "startZoomScrollOut mZoomScroll=(" 2788 + mZoomScrollX + ", " + mZoomScrollY +")"); 2789 } 2790 } 2791 2792 private void zoomScrollOut() { 2793 if (canZoomScrollOut() == false) { 2794 mTouchMode = TOUCH_DONE_MODE; 2795 return; 2796 } 2797 startZoomScrollOut(); 2798 mTouchMode = SCROLL_ZOOM_ANIMATION_OUT; 2799 invalidate(); 2800 } 2801 2802 private void moveZoomScrollWindow(float x, float y) { 2803 if (Math.abs(x - mLastZoomScrollRawX) < 1.5f 2804 && Math.abs(y - mLastZoomScrollRawY) < 1.5f) { 2805 return; 2806 } 2807 mLastZoomScrollRawX = x; 2808 mLastZoomScrollRawY = y; 2809 int oldX = mZoomScrollX; 2810 int oldY = mZoomScrollY; 2811 int width = getViewWidth(); 2812 int height = getViewHeight(); 2813 int maxZoomX = mContentWidth - width; 2814 if (maxZoomX > 0) { 2815 int maxScreenX = width - (int) Math.ceil(width 2816 * mZoomScrollLimit) - SCROLL_ZOOM_FINGER_BUFFER; 2817 if (LOGV_ENABLED) { 2818 Log.v(LOGTAG, "moveZoomScrollWindow-X" 2819 + " maxScreenX=" + maxScreenX + " width=" + width 2820 + " mZoomScrollLimit=" + mZoomScrollLimit + " x=" + x); 2821 } 2822 x += maxScreenX * mLastScrollX / maxZoomX - mLastTouchX; 2823 x *= Math.max(maxZoomX / maxScreenX, mZoomScrollInvLimit); 2824 mZoomScrollX = Math.max(0, Math.min(maxZoomX, (int) x)); 2825 } 2826 int maxZoomY = mContentHeight - height; 2827 if (maxZoomY > 0) { 2828 int maxScreenY = height - (int) Math.ceil(height 2829 * mZoomScrollLimit) - SCROLL_ZOOM_FINGER_BUFFER; 2830 if (LOGV_ENABLED) { 2831 Log.v(LOGTAG, "moveZoomScrollWindow-Y" 2832 + " maxScreenY=" + maxScreenY + " height=" + height 2833 + " mZoomScrollLimit=" + mZoomScrollLimit + " y=" + y); 2834 } 2835 y += maxScreenY * mLastScrollY / maxZoomY - mLastTouchY; 2836 y *= Math.max(maxZoomY / maxScreenY, mZoomScrollInvLimit); 2837 mZoomScrollY = Math.max(0, Math.min(maxZoomY, (int) y)); 2838 } 2839 if (oldX != mZoomScrollX || oldY != mZoomScrollY) { 2840 invalidate(); 2841 } 2842 if (LOGV_ENABLED) { 2843 Log.v(LOGTAG, "moveZoomScrollWindow" 2844 + " scrollTo=(" + mZoomScrollX + ", " + mZoomScrollY + ")" 2845 + " mLastTouch=(" + mLastTouchX + ", " + mLastTouchY + ")" 2846 + " maxZoom=(" + maxZoomX + ", " + maxZoomY + ")" 2847 + " last=("+mLastScrollX+", "+mLastScrollY+")" 2848 + " x=" + x + " y=" + y); 2849 } 2850 } 2851 2852 private void setZoomScrollIn() { 2853 mZoomScrollStart = System.currentTimeMillis(); 2854 } 2855 2856 private float mZoomScrollLimit; 2857 private float mZoomScrollInvLimit; 2858 private int mLastScrollX; 2859 private int mLastScrollY; 2860 private long mZoomScrollStart; 2861 private int mZoomScrollX; 2862 private int mZoomScrollY; 2863 private float mLastZoomScrollRawX = -1000.0f; 2864 private float mLastZoomScrollRawY = -1000.0f; 2865 // The zoomed scale varies from 1.0 to DEFAULT_MIN_ZOOM_SCALE == 0.25. 2866 // The zoom animation duration SCROLL_ZOOM_DURATION == 0.5. 2867 // Two pressures compete for gridding; a high frame rate (e.g. 20 fps) 2868 // and minimizing font cache allocations (fewer frames is better). 2869 // A SCROLL_ZOOM_GRID of 6 permits about 20 zoom levels over 0.5 seconds: 2870 // the inverse of: 1.0, 1.16, 1.33, 1.5, 1.67, 1.84, 2.0, etc. to 4.0 2871 private static final int SCROLL_ZOOM_GRID = 6; 2872 private static final int SCROLL_ZOOM_DURATION = 500; 2873 // Make it easier to get to the bottom of a document by reserving a 32 2874 // pixel buffer, for when the starting drag is a bit below the bottom of 2875 // the magnify frame. 2876 private static final int SCROLL_ZOOM_FINGER_BUFFER = 32; 2877 2878 // draw history 2879 private boolean mDrawHistory = false; 2880 private Picture mHistoryPicture = null; 2881 private int mHistoryWidth = 0; 2882 private int mHistoryHeight = 0; 2883 2884 // Only check the flag, can be called from WebCore thread 2885 boolean drawHistory() { 2886 return mDrawHistory; 2887 } 2888 2889 // Should only be called in UI thread 2890 void switchOutDrawHistory() { 2891 if (null == mWebViewCore) return; // CallbackProxy may trigger this 2892 if (mDrawHistory && mWebViewCore.pictureReady()) { 2893 mDrawHistory = false; 2894 invalidate(); 2895 int oldScrollX = mScrollX; 2896 int oldScrollY = mScrollY; 2897 mScrollX = pinLocX(mScrollX); 2898 mScrollY = pinLocY(mScrollY); 2899 if (oldScrollX != mScrollX || oldScrollY != mScrollY) { 2900 mUserScroll = false; 2901 mWebViewCore.sendMessage(EventHub.SYNC_SCROLL, oldScrollX, 2902 oldScrollY); 2903 } 2904 sendOurVisibleRect(); 2905 } 2906 } 2907 2908 WebViewCore.CursorData cursorData() { 2909 WebViewCore.CursorData result = new WebViewCore.CursorData(); 2910 result.mMoveGeneration = nativeMoveGeneration(); 2911 result.mFrame = nativeCursorFramePointer(); 2912 result.mNode = nativeCursorNodePointer(); 2913 Rect bounds = nativeCursorNodeBounds(); 2914 result.mX = bounds.centerX(); 2915 result.mY = bounds.centerY(); 2916 return result; 2917 } 2918 2919 /** 2920 * Delete text from start to end in the focused textfield. If there is no 2921 * focus, or if start == end, silently fail. If start and end are out of 2922 * order, swap them. 2923 * @param start Beginning of selection to delete. 2924 * @param end End of selection to delete. 2925 */ 2926 /* package */ void deleteSelection(int start, int end) { 2927 mTextGeneration++; 2928 mWebViewCore.sendMessage(EventHub.DELETE_SELECTION, start, end, 2929 cursorData()); 2930 } 2931 2932 /** 2933 * Set the selection to (start, end) in the focused textfield. If start and 2934 * end are out of order, swap them. 2935 * @param start Beginning of selection. 2936 * @param end End of selection. 2937 */ 2938 /* package */ void setSelection(int start, int end) { 2939 mWebViewCore.sendMessage(EventHub.SET_SELECTION, start, end, 2940 cursorData()); 2941 } 2942 2943 // Called by JNI when a touch event puts a textfield into focus. 2944 private void displaySoftKeyboard() { 2945 InputMethodManager imm = (InputMethodManager) 2946 getContext().getSystemService(Context.INPUT_METHOD_SERVICE); 2947 imm.showSoftInput(mTextEntry, 0); 2948 mTextEntry.enableScrollOnScreen(true); 2949 // Now we need to fake a touch event to place the cursor where the 2950 // user touched. 2951 AbsoluteLayout.LayoutParams lp = (AbsoluteLayout.LayoutParams) 2952 mTextEntry.getLayoutParams(); 2953 if (lp != null) { 2954 // Take the last touch and adjust for the location of the 2955 // TextDialog. 2956 float x = mLastTouchX + (float) (mScrollX - lp.x); 2957 float y = mLastTouchY + (float) (mScrollY - lp.y); 2958 mTextEntry.fakeTouchEvent(x, y); 2959 } 2960 } 2961 2962 private void updateTextEntry() { 2963 // If we do not have focus, do nothing until we gain focus. 2964 if (!hasFocus() && (null == mTextEntry || !mTextEntry.hasFocus()) 2965 || (mTouchMode >= FIRST_SCROLL_ZOOM 2966 && mTouchMode <= LAST_SCROLL_ZOOM)) { 2967 mNeedsUpdateTextEntry = true; 2968 return; 2969 } 2970 boolean alreadyThere = inEditingMode(); 2971 // inEditingMode can only return true if mTextEntry is non-null, 2972 // so we can safely call remove() if (alreadyThere) 2973 if (0 == mNativeClass || (!nativeFocusIsTextInput() 2974 && !nativeCursorIsTextInput())) { 2975 if (alreadyThere) { 2976 mTextEntry.remove(); 2977 } 2978 return; 2979 } 2980 // At this point, we know we have found an input field, so go ahead 2981 // and create the TextDialog if necessary. 2982 if (mTextEntry == null) { 2983 mTextEntry = new TextDialog(mContext, WebView.this); 2984 // Initialize our generation number. 2985 mTextGeneration = 0; 2986 } 2987 mTextEntry.setTextSize(contentToView(nativeFocusTextSize())); 2988 Rect visibleRect = sendOurVisibleRect(); 2989 // Note that sendOurVisibleRect calls viewToContent, so the coordinates 2990 // should be in content coordinates. 2991 Rect bounds = nativeFocusNodeBounds(); 2992 if (!Rect.intersects(bounds, visibleRect)) { 2993 // Node is not on screen, so do not bother. 2994 return; 2995 } 2996 String text = nativeFocusText(); 2997 int nodePointer = nativeFocusNodePointer(); 2998 if (alreadyThere && mTextEntry.isSameTextField(nodePointer)) { 2999 // It is possible that we have the same textfield, but it has moved, 3000 // i.e. In the case of opening/closing the screen. 3001 // In that case, we need to set the dimensions, but not the other 3002 // aspects. 3003 // We also need to restore the selection, which gets wrecked by 3004 // calling setTextEntryRect. 3005 Spannable spannable = (Spannable) mTextEntry.getText(); 3006 int start = Selection.getSelectionStart(spannable); 3007 int end = Selection.getSelectionEnd(spannable); 3008 // If the text has been changed by webkit, update it. However, if 3009 // there has been more UI text input, ignore it. We will receive 3010 // another update when that text is recognized. 3011 if (text != null && !text.equals(spannable.toString()) 3012 && nativeTextGeneration() == mTextGeneration) { 3013 mTextEntry.setTextAndKeepSelection(text); 3014 } else { 3015 Selection.setSelection(spannable, start, end); 3016 } 3017 } else { 3018 Rect vBox = contentToView(bounds); 3019 mTextEntry.setRect(vBox.left, vBox.top, vBox.width(), vBox.height()); 3020 mTextEntry.setGravity(nativeFocusIsRtlText() ? Gravity.RIGHT : 3021 Gravity.NO_GRAVITY); 3022 // this needs to be called before update adapter thread starts to 3023 // ensure the mTextEntry has the same node pointer 3024 mTextEntry.setNodePointer(nodePointer); 3025 int maxLength = -1; 3026 boolean isTextField = nativeFocusIsTextField(); 3027 if (isTextField) { 3028 maxLength = nativeFocusMaxLength(); 3029 String name = nativeFocusName(); 3030 if (mWebViewCore.getSettings().getSaveFormData() 3031 && name != null) { 3032 HashMap data = new HashMap(); 3033 data.put("text", text); 3034 Message update = mPrivateHandler.obtainMessage( 3035 UPDATE_TEXT_ENTRY_ADAPTER, nodePointer, 0, 3036 data); 3037 UpdateTextEntryAdapter updater = new UpdateTextEntryAdapter( 3038 name, getUrl(), update); 3039 Thread t = new Thread(updater); 3040 t.start(); 3041 } 3042 } 3043 mTextEntry.setMaxLength(maxLength); 3044 AutoCompleteAdapter adapter = null; 3045 mTextEntry.setAdapterCustom(adapter); 3046 mTextEntry.setSingleLine(isTextField); 3047 mTextEntry.setInPassword(nativeFocusIsPassword()); 3048 if (null == text) { 3049 mTextEntry.setText("", 0, 0); 3050 } else { 3051 // Change to true to enable the old style behavior, where 3052 // entering a textfield/textarea always set the selection to the 3053 // whole field. This was desirable for the case where the user 3054 // intends to scroll past the field using the trackball. 3055 // However, it causes a problem when replying to emails - the 3056 // user expects the cursor to be at the beginning of the 3057 // textarea. Testing out a new behavior, where textfields set 3058 // selection at the end, and textareas at the beginning. 3059 if (false) { 3060 mTextEntry.setText(text, 0, text.length()); 3061 } else if (isTextField) { 3062 int length = text.length(); 3063 mTextEntry.setText(text, length, length); 3064 } else { 3065 mTextEntry.setText(text, 0, 0); 3066 } 3067 } 3068 mTextEntry.requestFocus(); 3069 } 3070 } 3071 3072 private class UpdateTextEntryAdapter implements Runnable { 3073 private String mName; 3074 private String mUrl; 3075 private Message mUpdateMessage; 3076 3077 public UpdateTextEntryAdapter(String name, String url, Message msg) { 3078 mName = name; 3079 mUrl = url; 3080 mUpdateMessage = msg; 3081 } 3082 3083 public void run() { 3084 ArrayList<String> pastEntries = mDatabase.getFormData(mUrl, mName); 3085 if (pastEntries.size() > 0) { 3086 AutoCompleteAdapter adapter = new 3087 AutoCompleteAdapter(mContext, pastEntries); 3088 ((HashMap) mUpdateMessage.obj).put("adapter", adapter); 3089 mUpdateMessage.sendToTarget(); 3090 } 3091 } 3092 } 3093 3094 // This is used to determine long press with the enter key, or 3095 // a center key. Does not affect long press with the trackball/touch. 3096 private boolean mGotEnterDown = false; 3097 3098 @Override 3099 public boolean onKeyDown(int keyCode, KeyEvent event) { 3100 if (LOGV_ENABLED) { 3101 Log.v(LOGTAG, "keyDown at " + System.currentTimeMillis() 3102 + ", " + event); 3103 } 3104 3105 if (mNativeClass == 0) { 3106 return false; 3107 } 3108 3109 // do this hack up front, so it always works, regardless of touch-mode 3110 if (AUTO_REDRAW_HACK && (keyCode == KeyEvent.KEYCODE_CALL)) { 3111 mAutoRedraw = !mAutoRedraw; 3112 if (mAutoRedraw) { 3113 invalidate(); 3114 } 3115 return true; 3116 } 3117 3118 // Bubble up the key event if 3119 // 1. it is a system key; or 3120 // 2. the host application wants to handle it; or 3121 // 3. webview is in scroll-zoom state; 3122 if (event.isSystem() 3123 || mCallbackProxy.uiOverrideKeyEvent(event) 3124 || (mTouchMode >= FIRST_SCROLL_ZOOM && mTouchMode <= LAST_SCROLL_ZOOM)) { 3125 return false; 3126 } 3127 3128 if (mShiftIsPressed == false && nativeFocusNodeWantsKeyEvents() == false 3129 && (keyCode == KeyEvent.KEYCODE_SHIFT_LEFT 3130 || keyCode == KeyEvent.KEYCODE_SHIFT_RIGHT)) { 3131 mExtendSelection = false; 3132 mShiftIsPressed = true; 3133 if (nativeHasCursorNode()) { 3134 Rect rect = nativeCursorNodeBounds(); 3135 mSelectX = contentToView(rect.left); 3136 mSelectY = contentToView(rect.top); 3137 } else { 3138 mSelectX = mScrollX + (int) mLastTouchX; 3139 mSelectY = mScrollY + (int) mLastTouchY; 3140 } 3141 int contentX = viewToContent((int) mLastTouchX + mScrollX); 3142 int contentY = viewToContent((int) mLastTouchY + mScrollY); 3143 nativeClearFocus(contentX, contentY); 3144 } 3145 3146 if (keyCode >= KeyEvent.KEYCODE_DPAD_UP 3147 && keyCode <= KeyEvent.KEYCODE_DPAD_RIGHT) { 3148 // always handle the navigation keys in the UI thread 3149 switchOutDrawHistory(); 3150 if (navHandledKey(keyCode, 1, false, event.getEventTime())) { 3151 playSoundEffect(keyCodeToSoundsEffect(keyCode)); 3152 return true; 3153 } 3154 // Bubble up the key event as WebView doesn't handle it 3155 return false; 3156 } 3157 3158 if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER 3159 || keyCode == KeyEvent.KEYCODE_ENTER) { 3160 switchOutDrawHistory(); 3161 if (event.getRepeatCount() == 0) { 3162 mGotEnterDown = true; 3163 mPrivateHandler.sendMessageDelayed(mPrivateHandler 3164 .obtainMessage(LONG_PRESS_ENTER), LONG_PRESS_TIMEOUT); 3165 // Already checked mNativeClass, so we do not need to check it 3166 // again. 3167 nativeRecordButtons(hasFocus() && hasWindowFocus(), true, true); 3168 return true; 3169 } 3170 // Bubble up the key event as WebView doesn't handle it 3171 return false; 3172 } 3173 3174 if (keyCode != KeyEvent.KEYCODE_SHIFT_LEFT 3175 && keyCode != KeyEvent.KEYCODE_SHIFT_RIGHT) { 3176 // turn off copy select if a shift-key combo is pressed 3177 mExtendSelection = mShiftIsPressed = false; 3178 if (mTouchMode == TOUCH_SELECT_MODE) { 3179 mTouchMode = TOUCH_INIT_MODE; 3180 } 3181 } 3182 3183 if (getSettings().getNavDump()) { 3184 switch (keyCode) { 3185 case KeyEvent.KEYCODE_4: 3186 // "/data/data/com.android.browser/displayTree.txt" 3187 nativeDumpDisplayTree(getUrl()); 3188 break; 3189 case KeyEvent.KEYCODE_5: 3190 case KeyEvent.KEYCODE_6: 3191 // 5: dump the dom tree to the file 3192 // "/data/data/com.android.browser/domTree.txt" 3193 // 6: dump the dom tree to the adb log 3194 mWebViewCore.sendMessage(EventHub.DUMP_DOMTREE, 3195 (keyCode == KeyEvent.KEYCODE_5) ? 1 : 0, 0); 3196 break; 3197 case KeyEvent.KEYCODE_7: 3198 case KeyEvent.KEYCODE_8: 3199 // 7: dump the render tree to the file 3200 // "/data/data/com.android.browser/renderTree.txt" 3201 // 8: dump the render tree to the adb log 3202 mWebViewCore.sendMessage(EventHub.DUMP_RENDERTREE, 3203 (keyCode == KeyEvent.KEYCODE_7) ? 1 : 0, 0); 3204 break; 3205 case KeyEvent.KEYCODE_9: 3206 nativeInstrumentReport(); 3207 return true; 3208 } 3209 } 3210 3211 // TODO: should we pass all the keys to DOM or check the meta tag 3212 if (nativeFocusNodeWantsKeyEvents() || true) { 3213 // pass the key to DOM 3214 mWebViewCore.sendMessage(EventHub.KEY_DOWN, event); 3215 // return true as DOM handles the key 3216 return true; 3217 } 3218 3219 // Bubble up the key event as WebView doesn't handle it 3220 return false; 3221 } 3222 3223 @Override 3224 public boolean onKeyUp(int keyCode, KeyEvent event) { 3225 if (LOGV_ENABLED) { 3226 Log.v(LOGTAG, "keyUp at " + System.currentTimeMillis() 3227 + ", " + event); 3228 } 3229 3230 if (mNativeClass == 0) { 3231 return false; 3232 } 3233 3234 // special CALL handling when focus node's href is "tel:XXX" 3235 if (keyCode == KeyEvent.KEYCODE_CALL && nativeHasCursorNode()) { 3236 String text = nativeCursorText(); 3237 if (!nativeCursorIsTextInput() && text != null 3238 && text.startsWith(SCHEME_TEL)) { 3239 Intent intent = new Intent(Intent.ACTION_DIAL, Uri.parse(text)); 3240 getContext().startActivity(intent); 3241 return true; 3242 } 3243 } 3244 3245 // Bubble up the key event if 3246 // 1. it is a system key; or 3247 // 2. the host application wants to handle it; 3248 if (event.isSystem() || mCallbackProxy.uiOverrideKeyEvent(event)) { 3249 return false; 3250 } 3251 3252 // special handling in scroll_zoom state 3253 if (mTouchMode >= FIRST_SCROLL_ZOOM && mTouchMode <= LAST_SCROLL_ZOOM) { 3254 if (KeyEvent.KEYCODE_DPAD_CENTER == keyCode 3255 && mTouchMode != SCROLL_ZOOM_ANIMATION_IN) { 3256 setZoomScrollIn(); 3257 mTouchMode = SCROLL_ZOOM_ANIMATION_IN; 3258 invalidate(); 3259 return true; 3260 } 3261 return false; 3262 } 3263 3264 if (keyCode == KeyEvent.KEYCODE_SHIFT_LEFT 3265 || keyCode == KeyEvent.KEYCODE_SHIFT_RIGHT) { 3266 if (commitCopy()) { 3267 return true; 3268 } 3269 } 3270 3271 if (keyCode >= KeyEvent.KEYCODE_DPAD_UP 3272 && keyCode <= KeyEvent.KEYCODE_DPAD_RIGHT) { 3273 // always handle the navigation keys in the UI thread 3274 // Bubble up the key event as WebView doesn't handle it 3275 return false; 3276 } 3277 3278 if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER 3279 || keyCode == KeyEvent.KEYCODE_ENTER) { 3280 // remove the long press message first 3281 mPrivateHandler.removeMessages(LONG_PRESS_ENTER); 3282 mGotEnterDown = false; 3283 3284 if (KeyEvent.KEYCODE_DPAD_CENTER == keyCode) { 3285 if (mShiftIsPressed) { 3286 return false; 3287 } 3288 if (getSettings().supportZoom()) { 3289 if (mTouchMode == TOUCH_DOUBLECLICK_MODE) { 3290 zoomScrollOut(); 3291 } else { 3292 if (LOGV_ENABLED) { 3293 Log.v(LOGTAG, "TOUCH_DOUBLECLICK_MODE"); 3294 } 3295 mPrivateHandler.sendMessageDelayed(mPrivateHandler 3296 .obtainMessage(SWITCH_TO_CLICK), TAP_TIMEOUT); 3297 mTouchMode = TOUCH_DOUBLECLICK_MODE; 3298 } 3299 return true; 3300 } 3301 } 3302 3303 Rect visibleRect = sendOurVisibleRect(); 3304 // Note that sendOurVisibleRect calls viewToContent, so the 3305 // coordinates should be in content coordinates. 3306 if (nativeCursorIntersects(visibleRect)) { 3307 nativeSetFollowedLink(true); 3308 mWebViewCore.sendMessage(EventHub.SET_MOVE_MOUSE, 3309 EventHub.BLOCK_FOCUS_CHANGE_UNTIL_KEY_UP, 0, 3310 cursorData()); 3311 playSoundEffect(SoundEffectConstants.CLICK); 3312 return true; 3313 } else if (nativeHasCursorNode()) { 3314 return true; 3315 } 3316 // Bubble up the key event as WebView doesn't handle it 3317 return false; 3318 } 3319 3320 // TODO: should we pass all the keys to DOM or check the meta tag 3321 if (nativeFocusNodeWantsKeyEvents() || true) { 3322 // pass the key to DOM 3323 mWebViewCore.sendMessage(EventHub.KEY_UP, event); 3324 // return true as DOM handles the key 3325 return true; 3326 } 3327 3328 // Bubble up the key event as WebView doesn't handle it 3329 return false; 3330 } 3331 3332 /** 3333 * @hide 3334 */ 3335 public void emulateShiftHeld() { 3336 mExtendSelection = false; 3337 mShiftIsPressed = true; 3338 int contentX = viewToContent((int) mLastTouchX + mScrollX); 3339 int contentY = viewToContent((int) mLastTouchY + mScrollY); 3340 nativeClearFocus(contentX, contentY); 3341 } 3342 3343 private boolean commitCopy() { 3344 boolean copiedSomething = false; 3345 if (mExtendSelection) { 3346 // copy region so core operates on copy without touching orig. 3347 Region selection = new Region(nativeGetSelection()); 3348 if (selection.isEmpty() == false) { 3349 Toast.makeText(mContext 3350 , com.android.internal.R.string.text_copied 3351 , Toast.LENGTH_SHORT).show(); 3352 mWebViewCore.sendMessage(EventHub.GET_SELECTION, selection); 3353 copiedSomething = true; 3354 } 3355 mExtendSelection = false; 3356 } 3357 mShiftIsPressed = false; 3358 if (mTouchMode == TOUCH_SELECT_MODE) { 3359 mTouchMode = TOUCH_INIT_MODE; 3360 } 3361 return copiedSomething; 3362 } 3363 3364 // Set this as a hierarchy change listener so we can know when this view 3365 // is removed and still have access to our parent. 3366 @Override 3367 protected void onAttachedToWindow() { 3368 super.onAttachedToWindow(); 3369 ViewParent parent = getParent(); 3370 if (parent instanceof ViewGroup) { 3371 ViewGroup p = (ViewGroup) parent; 3372 p.setOnHierarchyChangeListener(this); 3373 } 3374 } 3375 3376 @Override 3377 protected void onDetachedFromWindow() { 3378 super.onDetachedFromWindow(); 3379 ViewParent parent = getParent(); 3380 if (parent instanceof ViewGroup) { 3381 ViewGroup p = (ViewGroup) parent; 3382 p.setOnHierarchyChangeListener(null); 3383 } 3384 3385 // Clean up the zoom controller 3386 mZoomButtonsController.setVisible(false); 3387 } 3388 3389 // Implementation for OnHierarchyChangeListener 3390 public void onChildViewAdded(View parent, View child) {} 3391 3392 public void onChildViewRemoved(View p, View child) { 3393 if (child == this) { 3394 if (inEditingMode()) { 3395 clearTextEntry(); 3396 mNeedsUpdateTextEntry = true; 3397 } 3398 } 3399 } 3400 3401 /** 3402 * @deprecated WebView should not have implemented 3403 * ViewTreeObserver.OnGlobalFocusChangeListener. This method 3404 * does nothing now. 3405 */ 3406 @Deprecated 3407 public void onGlobalFocusChanged(View oldFocus, View newFocus) { 3408 } 3409 3410 // To avoid drawing the cursor ring, and remove the TextView when our window 3411 // loses focus. 3412 @Override 3413 public void onWindowFocusChanged(boolean hasWindowFocus) { 3414 if (hasWindowFocus) { 3415 if (hasFocus()) { 3416 // If our window regained focus, and we have focus, then begin 3417 // drawing the cursor ring, and restore the TextView if 3418 // necessary. 3419 mDrawCursorRing = true; 3420 if (mNeedsUpdateTextEntry) { 3421 updateTextEntry(); 3422 } 3423 if (mNativeClass != 0) { 3424 nativeRecordButtons(true, false, true); 3425 } 3426 setFocusControllerActive(true); 3427 } else { 3428 // If our window gained focus, but we do not have it, do not 3429 // draw the cursor ring. 3430 mDrawCursorRing = false; 3431 // We do not call nativeRecordButtons here because we assume 3432 // that when we lost focus, or window focus, it got called with 3433 // false for the first parameter 3434 } 3435 } else { 3436 if (getSettings().getBuiltInZoomControls() && !mZoomButtonsController.isVisible()) { 3437 /* 3438 * The zoom controls come in their own window, so our window 3439 * loses focus. Our policy is to not draw the cursor ring if 3440 * our window is not focused, but this is an exception since 3441 * the user can still navigate the web page with the zoom 3442 * controls showing. 3443 */ 3444 // If our window has lost focus, stop drawing the cursor ring 3445 mDrawCursorRing = false; 3446 } 3447 mGotKeyDown = false; 3448 mShiftIsPressed = false; 3449 if (mNativeClass != 0) { 3450 nativeRecordButtons(false, false, true); 3451 } 3452 setFocusControllerActive(false); 3453 } 3454 invalidate(); 3455 super.onWindowFocusChanged(hasWindowFocus); 3456 } 3457 3458 /* 3459 * Pass a message to WebCore Thread, determining whether the WebCore::Page's 3460 * FocusController is "active" so that it will draw the blinking cursor. 3461 */ 3462 private void setFocusControllerActive(boolean active) { 3463 if (mWebViewCore != null) { 3464 mWebViewCore.sendMessage(EventHub.SET_ACTIVE, active ? 1 : 0, 0); 3465 } 3466 } 3467 3468 @Override 3469 protected void onFocusChanged(boolean focused, int direction, 3470 Rect previouslyFocusedRect) { 3471 if (LOGV_ENABLED) { 3472 Log.v(LOGTAG, "MT focusChanged " + focused + ", " + direction); 3473 } 3474 if (focused) { 3475 // When we regain focus, if we have window focus, resume drawing 3476 // the cursor ring, and add the TextView if necessary. 3477 if (hasWindowFocus()) { 3478 mDrawCursorRing = true; 3479 if (mNeedsUpdateTextEntry) { 3480 updateTextEntry(); 3481 mNeedsUpdateTextEntry = false; 3482 } 3483 if (mNativeClass != 0) { 3484 nativeRecordButtons(true, false, true); 3485 } 3486 // FIXME: This is unnecessary if we are gaining focus from the 3487 // TextDialog. How can we tell if it was the last thing in 3488 // focus? 3489 setFocusControllerActive(true); 3490 //} else { 3491 // The WebView has gained focus while we do not have 3492 // windowfocus. When our window lost focus, we should have 3493 // called nativeRecordButtons(false...) 3494 } 3495 } else { 3496 // When we lost focus, unless focus went to the TextView (which is 3497 // true if we are in editing mode), stop drawing the cursor ring. 3498 if (!inEditingMode()) { 3499 mDrawCursorRing = false; 3500 if (mNativeClass != 0) { 3501 nativeRecordButtons(false, false, true); 3502 } 3503 setFocusControllerActive(false); 3504 } 3505 mGotKeyDown = false; 3506 } 3507 3508 super.onFocusChanged(focused, direction, previouslyFocusedRect); 3509 } 3510 3511 @Override 3512 protected void onSizeChanged(int w, int h, int ow, int oh) { 3513 super.onSizeChanged(w, h, ow, oh); 3514 // Center zooming to the center of the screen. 3515 mZoomCenterX = getViewWidth() * .5f; 3516 mZoomCenterY = getViewHeight() * .5f; 3517 3518 // update mMinZoomScale if the minimum zoom scale is not fixed 3519 if (!mMinZoomScaleFixed) { 3520 mMinZoomScale = (float) getViewWidth() 3521 / Math.max(ZOOM_OUT_WIDTH, mContentWidth); 3522 } 3523 3524 // we always force, in case our height changed, in which case we still 3525 // want to send the notification over to webkit 3526 setNewZoomScale(mActualScale, true); 3527 } 3528 3529 @Override 3530 protected void onScrollChanged(int l, int t, int oldl, int oldt) { 3531 super.onScrollChanged(l, t, oldl, oldt); 3532 sendOurVisibleRect(); 3533 } 3534 3535 3536 @Override 3537 public boolean dispatchKeyEvent(KeyEvent event) { 3538 boolean dispatch = true; 3539 3540 if (!inEditingMode()) { 3541 if (event.getAction() == KeyEvent.ACTION_DOWN) { 3542 mGotKeyDown = true; 3543 } else { 3544 if (!mGotKeyDown) { 3545 /* 3546 * We got a key up for which we were not the recipient of 3547 * the original key down. Don't give it to the view. 3548 */ 3549 dispatch = false; 3550 } 3551 mGotKeyDown = false; 3552 } 3553 } 3554 3555 if (dispatch) { 3556 return super.dispatchKeyEvent(event); 3557 } else { 3558 // We didn't dispatch, so let something else handle the key 3559 return false; 3560 } 3561 } 3562 3563 // Here are the snap align logic: 3564 // 1. If it starts nearly horizontally or vertically, snap align; 3565 // 2. If there is a dramitic direction change, let it go; 3566 // 3. If there is a same direction back and forth, lock it. 3567 3568 // adjustable parameters 3569 private int mMinLockSnapReverseDistance; 3570 private static final float MAX_SLOPE_FOR_DIAG = 1.5f; 3571 private static final int MIN_BREAK_SNAP_CROSS_DISTANCE = 80; 3572 3573 @Override 3574 public boolean onTouchEvent(MotionEvent ev) { 3575 if (mNativeClass == 0 || !isClickable() || !isLongClickable()) { 3576 return false; 3577 } 3578 3579 if (LOGV_ENABLED) { 3580 Log.v(LOGTAG, ev + " at " + ev.getEventTime() + " mTouchMode=" 3581 + mTouchMode); 3582 } 3583 3584 int action = ev.getAction(); 3585 float x = ev.getX(); 3586 float y = ev.getY(); 3587 long eventTime = ev.getEventTime(); 3588 3589 // Due to the touch screen edge effect, a touch closer to the edge 3590 // always snapped to the edge. As getViewWidth() can be different from 3591 // getWidth() due to the scrollbar, adjusting the point to match 3592 // getViewWidth(). Same applied to the height. 3593 if (x > getViewWidth() - 1) { 3594 x = getViewWidth() - 1; 3595 } 3596 if (y > getViewHeight() - 1) { 3597 y = getViewHeight() - 1; 3598 } 3599 3600 // pass the touch events from UI thread to WebCore thread 3601 if (mForwardTouchEvents && mTouchMode != SCROLL_ZOOM_OUT 3602 && mTouchMode != SCROLL_ZOOM_ANIMATION_IN 3603 && mTouchMode != SCROLL_ZOOM_ANIMATION_OUT 3604 && (action != MotionEvent.ACTION_MOVE || 3605 eventTime - mLastSentTouchTime > TOUCH_SENT_INTERVAL)) { 3606 WebViewCore.TouchEventData ted = new WebViewCore.TouchEventData(); 3607 ted.mAction = action; 3608 ted.mX = viewToContent((int) x + mScrollX); 3609 ted.mY = viewToContent((int) y + mScrollY); 3610 mWebViewCore.sendMessage(EventHub.TOUCH_EVENT, ted); 3611 mLastSentTouchTime = eventTime; 3612 } 3613 3614 int deltaX = (int) (mLastTouchX - x); 3615 int deltaY = (int) (mLastTouchY - y); 3616 3617 switch (action) { 3618 case MotionEvent.ACTION_DOWN: { 3619 if (mTouchMode == SCROLL_ZOOM_ANIMATION_IN 3620 || mTouchMode == SCROLL_ZOOM_ANIMATION_OUT) { 3621 // no interaction while animation is in progress 3622 break; 3623 } else if (mTouchMode == SCROLL_ZOOM_OUT) { 3624 mLastScrollX = mZoomScrollX; 3625 mLastScrollY = mZoomScrollY; 3626 // If two taps are close, ignore the first tap 3627 } else if (!mScroller.isFinished()) { 3628 mScroller.abortAnimation(); 3629 mTouchMode = TOUCH_DRAG_START_MODE; 3630 mPrivateHandler.removeMessages(RESUME_WEBCORE_UPDATE); 3631 } else if (mShiftIsPressed) { 3632 mSelectX = mScrollX + (int) x; 3633 mSelectY = mScrollY + (int) y; 3634 mTouchMode = TOUCH_SELECT_MODE; 3635 if (LOGV_ENABLED) { 3636 Log.v(LOGTAG, "select=" + mSelectX + "," + mSelectY); 3637 } 3638 nativeMoveSelection(viewToContent(mSelectX) 3639 , viewToContent(mSelectY), false); 3640 mTouchSelection = mExtendSelection = true; 3641 } else { 3642 mTouchMode = TOUCH_INIT_MODE; 3643 mPreventDrag = mForwardTouchEvents; 3644 if (mLogEvent && eventTime - mLastTouchUpTime < 1000) { 3645 EventLog.writeEvent(EVENT_LOG_DOUBLE_TAP_DURATION, 3646 (eventTime - mLastTouchUpTime), eventTime); 3647 } 3648 } 3649 // Trigger the link 3650 if (mTouchMode == TOUCH_INIT_MODE) { 3651 mPrivateHandler.sendMessageDelayed(mPrivateHandler 3652 .obtainMessage(SWITCH_TO_SHORTPRESS), TAP_TIMEOUT); 3653 } 3654 // Remember where the motion event started 3655 mLastTouchX = x; 3656 mLastTouchY = y; 3657 mLastTouchTime = eventTime; 3658 mVelocityTracker = VelocityTracker.obtain(); 3659 mSnapScrollMode = SNAP_NONE; 3660 break; 3661 } 3662 case MotionEvent.ACTION_MOVE: { 3663 if (mTouchMode == TOUCH_DONE_MODE 3664 || mTouchMode == SCROLL_ZOOM_ANIMATION_IN 3665 || mTouchMode == SCROLL_ZOOM_ANIMATION_OUT) { 3666 // no dragging during scroll zoom animation 3667 break; 3668 } 3669 if (mTouchMode == SCROLL_ZOOM_OUT) { 3670 // while fully zoomed out, move the virtual window 3671 moveZoomScrollWindow(x, y); 3672 break; 3673 } 3674 mVelocityTracker.addMovement(ev); 3675 3676 if (mTouchMode != TOUCH_DRAG_MODE) { 3677 if (mTouchMode == TOUCH_SELECT_MODE) { 3678 mSelectX = mScrollX + (int) x; 3679 mSelectY = mScrollY + (int) y; 3680 if (LOGV_ENABLED) { 3681 Log.v(LOGTAG, "xtend=" + mSelectX + "," + mSelectY); 3682 } 3683 nativeMoveSelection(viewToContent(mSelectX) 3684 , viewToContent(mSelectY), true); 3685 invalidate(); 3686 break; 3687 } 3688 if (mPreventDrag || (deltaX * deltaX + deltaY * deltaY) 3689 < mTouchSlopSquare) { 3690 break; 3691 } 3692 3693 if (mTouchMode == TOUCH_SHORTPRESS_MODE 3694 || mTouchMode == TOUCH_SHORTPRESS_START_MODE) { 3695 mPrivateHandler.removeMessages(SWITCH_TO_LONGPRESS); 3696 } else if (mTouchMode == TOUCH_INIT_MODE) { 3697 mPrivateHandler.removeMessages(SWITCH_TO_SHORTPRESS); 3698 } 3699 3700 // if it starts nearly horizontal or vertical, enforce it 3701 int ax = Math.abs(deltaX); 3702 int ay = Math.abs(deltaY); 3703 if (ax > MAX_SLOPE_FOR_DIAG * ay) { 3704 mSnapScrollMode = SNAP_X; 3705 mSnapPositive = deltaX > 0; 3706 } else if (ay > MAX_SLOPE_FOR_DIAG * ax) { 3707 mSnapScrollMode = SNAP_Y; 3708 mSnapPositive = deltaY > 0; 3709 } 3710 3711 mTouchMode = TOUCH_DRAG_MODE; 3712 WebViewCore.pauseUpdate(mWebViewCore); 3713 int contentX = viewToContent((int) x + mScrollX); 3714 int contentY = viewToContent((int) y + mScrollY); 3715 nativeClearFocus(contentX, contentY); 3716 // remove the zoom anchor if there is any 3717 if (mZoomScale != 0) { 3718 mWebViewCore 3719 .sendMessage(EventHub.SET_SNAP_ANCHOR, 0, 0); 3720 } 3721 WebSettings settings = getSettings(); 3722 if (settings.supportZoom() 3723 && settings.getBuiltInZoomControls() 3724 && !mZoomButtonsController.isVisible() 3725 && (canZoomScrollOut() || 3726 mMinZoomScale < mMaxZoomScale)) { 3727 mZoomButtonsController.setVisible(true); 3728 } 3729 } 3730 3731 // do pan 3732 int newScrollX = pinLocX(mScrollX + deltaX); 3733 deltaX = newScrollX - mScrollX; 3734 int newScrollY = pinLocY(mScrollY + deltaY); 3735 deltaY = newScrollY - mScrollY; 3736 boolean done = false; 3737 if (deltaX == 0 && deltaY == 0) { 3738 done = true; 3739 } else { 3740 if (mSnapScrollMode == SNAP_X || mSnapScrollMode == SNAP_Y) { 3741 int ax = Math.abs(deltaX); 3742 int ay = Math.abs(deltaY); 3743 if (mSnapScrollMode == SNAP_X) { 3744 // radical change means getting out of snap mode 3745 if (ay > MAX_SLOPE_FOR_DIAG * ax 3746 && ay > MIN_BREAK_SNAP_CROSS_DISTANCE) { 3747 mSnapScrollMode = SNAP_NONE; 3748 } 3749 // reverse direction means lock in the snap mode 3750 if ((ax > MAX_SLOPE_FOR_DIAG * ay) && 3751 ((mSnapPositive && 3752 deltaX < -mMinLockSnapReverseDistance) 3753 || (!mSnapPositive && 3754 deltaX > mMinLockSnapReverseDistance))) { 3755 mSnapScrollMode = SNAP_X_LOCK; 3756 } 3757 } else { 3758 // radical change means getting out of snap mode 3759 if ((ax > MAX_SLOPE_FOR_DIAG * ay) 3760 && ax > MIN_BREAK_SNAP_CROSS_DISTANCE) { 3761 mSnapScrollMode = SNAP_NONE; 3762 } 3763 // reverse direction means lock in the snap mode 3764 if ((ay > MAX_SLOPE_FOR_DIAG * ax) && 3765 ((mSnapPositive && 3766 deltaY < -mMinLockSnapReverseDistance) 3767 || (!mSnapPositive && 3768 deltaY > mMinLockSnapReverseDistance))) { 3769 mSnapScrollMode = SNAP_Y_LOCK; 3770 } 3771 } 3772 } 3773 3774 if (mSnapScrollMode == SNAP_X 3775 || mSnapScrollMode == SNAP_X_LOCK) { 3776 scrollBy(deltaX, 0); 3777 mLastTouchX = x; 3778 } else if (mSnapScrollMode == SNAP_Y 3779 || mSnapScrollMode == SNAP_Y_LOCK) { 3780 scrollBy(0, deltaY); 3781 mLastTouchY = y; 3782 } else { 3783 scrollBy(deltaX, deltaY); 3784 mLastTouchX = x; 3785 mLastTouchY = y; 3786 } 3787 mLastTouchTime = eventTime; 3788 mUserScroll = true; 3789 } 3790 3791 if (!getSettings().getBuiltInZoomControls()) { 3792 boolean showPlusMinus = mMinZoomScale < mMaxZoomScale; 3793 boolean showMagnify = canZoomScrollOut(); 3794 if (mZoomControls != null && (showPlusMinus || showMagnify)) { 3795 if (mZoomControls.getVisibility() == View.VISIBLE) { 3796 mPrivateHandler.removeCallbacks(mZoomControlRunnable); 3797 } else { 3798 mZoomControls.show(showPlusMinus, showMagnify); 3799 } 3800 mPrivateHandler.postDelayed(mZoomControlRunnable, 3801 ZOOM_CONTROLS_TIMEOUT); 3802 } 3803 } 3804 3805 if (done) { 3806 // return false to indicate that we can't pan out of the 3807 // view space 3808 return false; 3809 } 3810 break; 3811 } 3812 case MotionEvent.ACTION_UP: { 3813 mLastTouchUpTime = eventTime; 3814 switch (mTouchMode) { 3815 case TOUCH_INIT_MODE: // tap 3816 case TOUCH_SHORTPRESS_START_MODE: 3817 case TOUCH_SHORTPRESS_MODE: 3818 mPrivateHandler.removeMessages(SWITCH_TO_SHORTPRESS); 3819 mPrivateHandler.removeMessages(SWITCH_TO_LONGPRESS); 3820 mTouchMode = TOUCH_DONE_MODE; 3821 doShortPress(); 3822 break; 3823 case TOUCH_SELECT_MODE: 3824 commitCopy(); 3825 mTouchSelection = false; 3826 break; 3827 case SCROLL_ZOOM_ANIMATION_IN: 3828 case SCROLL_ZOOM_ANIMATION_OUT: 3829 // no action during scroll animation 3830 break; 3831 case SCROLL_ZOOM_OUT: 3832 if (LOGV_ENABLED) { 3833 Log.v(LOGTAG, "ACTION_UP SCROLL_ZOOM_OUT" 3834 + " eventTime - mLastTouchTime=" 3835 + (eventTime - mLastTouchTime)); 3836 } 3837 // for now, always zoom back when the drag completes 3838 if (true || eventTime - mLastTouchTime < TAP_TIMEOUT) { 3839 // but if we tap, zoom in where we tap 3840 if (eventTime - mLastTouchTime < TAP_TIMEOUT) { 3841 zoomScrollTap(x, y); 3842 } 3843 // start zooming in back to the original view 3844 setZoomScrollIn(); 3845 mTouchMode = SCROLL_ZOOM_ANIMATION_IN; 3846 invalidate(); 3847 } 3848 break; 3849 case TOUCH_DRAG_MODE: 3850 // if the user waits a while w/o moving before the 3851 // up, we don't want to do a fling 3852 if (eventTime - mLastTouchTime <= MIN_FLING_TIME) { 3853 mVelocityTracker.addMovement(ev); 3854 doFling(); 3855 break; 3856 } 3857 WebViewCore.resumeUpdate(mWebViewCore); 3858 break; 3859 case TOUCH_DRAG_START_MODE: 3860 case TOUCH_DONE_MODE: 3861 // do nothing 3862 break; 3863 } 3864 // we also use mVelocityTracker == null to tell us that we are 3865 // not "moving around", so we can take the slower/prettier 3866 // mode in the drawing code 3867 if (mVelocityTracker != null) { 3868 mVelocityTracker.recycle(); 3869 mVelocityTracker = null; 3870 } 3871 break; 3872 } 3873 case MotionEvent.ACTION_CANCEL: { 3874 // we also use mVelocityTracker == null to tell us that we are 3875 // not "moving around", so we can take the slower/prettier 3876 // mode in the drawing code 3877 if (mVelocityTracker != null) { 3878 mVelocityTracker.recycle(); 3879 mVelocityTracker = null; 3880 } 3881 if (mTouchMode == SCROLL_ZOOM_OUT || 3882 mTouchMode == SCROLL_ZOOM_ANIMATION_IN) { 3883 scrollTo(mZoomScrollX, mZoomScrollY); 3884 } else if (mTouchMode == TOUCH_DRAG_MODE) { 3885 WebViewCore.resumeUpdate(mWebViewCore); 3886 } 3887 mPrivateHandler.removeMessages(SWITCH_TO_SHORTPRESS); 3888 mPrivateHandler.removeMessages(SWITCH_TO_LONGPRESS); 3889 mTouchMode = TOUCH_DONE_MODE; 3890 int contentX = viewToContent((int) mLastTouchX + mScrollX); 3891 int contentY = viewToContent((int) mLastTouchY + mScrollY); 3892 nativeClearFocus(contentX, contentY); 3893 break; 3894 } 3895 } 3896 return true; 3897 } 3898 3899 private long mTrackballFirstTime = 0; 3900 private long mTrackballLastTime = 0; 3901 private float mTrackballRemainsX = 0.0f; 3902 private float mTrackballRemainsY = 0.0f; 3903 private int mTrackballXMove = 0; 3904 private int mTrackballYMove = 0; 3905 private boolean mExtendSelection = false; 3906 private boolean mTouchSelection = false; 3907 private static final int TRACKBALL_KEY_TIMEOUT = 1000; 3908 private static final int TRACKBALL_TIMEOUT = 200; 3909 private static final int TRACKBALL_WAIT = 100; 3910 private static final int TRACKBALL_SCALE = 400; 3911 private static final int TRACKBALL_SCROLL_COUNT = 5; 3912 private static final int TRACKBALL_MOVE_COUNT = 10; 3913 private static final int TRACKBALL_MULTIPLIER = 3; 3914 private static final int SELECT_CURSOR_OFFSET = 16; 3915 private int mSelectX = 0; 3916 private int mSelectY = 0; 3917 private boolean mShiftIsPressed = false; 3918 private boolean mTrackballDown = false; 3919 private long mTrackballUpTime = 0; 3920 private long mLastFocusTime = 0; 3921 private Rect mLastFocusBounds; 3922 3923 // Set by default; BrowserActivity clears to interpret trackball data 3924 // directly for movement. Currently, the framework only passes 3925 // arrow key events, not trackball events, from one child to the next 3926 private boolean mMapTrackballToArrowKeys = true; 3927 3928 public void setMapTrackballToArrowKeys(boolean setMap) { 3929 mMapTrackballToArrowKeys = setMap; 3930 } 3931 3932 void resetTrackballTime() { 3933 mTrackballLastTime = 0; 3934 } 3935 3936 @Override 3937 public boolean onTrackballEvent(MotionEvent ev) { 3938 long time = ev.getEventTime(); 3939 if ((ev.getMetaState() & KeyEvent.META_ALT_ON) != 0) { 3940 if (ev.getY() > 0) pageDown(true); 3941 if (ev.getY() < 0) pageUp(true); 3942 return true; 3943 } 3944 if (ev.getAction() == MotionEvent.ACTION_DOWN) { 3945 mPrivateHandler.removeMessages(SWITCH_TO_CLICK); 3946 mTrackballDown = true; 3947 if (mNativeClass != 0) { 3948 nativeRecordButtons(hasFocus() && hasWindowFocus(), true, true); 3949 } 3950 if (time - mLastFocusTime <= TRACKBALL_TIMEOUT 3951 && !mLastFocusBounds.equals(nativeGetCursorRingBounds())) { 3952 nativeSelectBestAt(mLastFocusBounds); 3953 } 3954 if (LOGV_ENABLED) { 3955 Log.v(LOGTAG, "onTrackballEvent down ev=" + ev 3956 + " time=" + time 3957 + " mLastFocusTime=" + mLastFocusTime); 3958 } 3959 if (isInTouchMode()) requestFocusFromTouch(); 3960 return false; // let common code in onKeyDown at it 3961 } 3962 if (ev.getAction() == MotionEvent.ACTION_UP) { 3963 // LONG_PRESS_ENTER is set in common onKeyDown 3964 mPrivateHandler.removeMessages(LONG_PRESS_ENTER); 3965 mTrackballDown = false; 3966 mTrackballUpTime = time; 3967 if (mShiftIsPressed) { 3968 if (mExtendSelection) { 3969 commitCopy(); 3970 } else { 3971 mExtendSelection = true; 3972 } 3973 } 3974 if (LOGV_ENABLED) { 3975 Log.v(LOGTAG, "onTrackballEvent up ev=" + ev 3976 + " time=" + time 3977 ); 3978 } 3979 return false; // let common code in onKeyUp at it 3980 } 3981 if (mMapTrackballToArrowKeys && mShiftIsPressed == false) { 3982 if (LOGV_ENABLED) Log.v(LOGTAG, "onTrackballEvent gmail quit"); 3983 return false; 3984 } 3985 // no move if we're still waiting on SWITCH_TO_CLICK timeout 3986 if (mTouchMode == TOUCH_DOUBLECLICK_MODE) { 3987 if (LOGV_ENABLED) Log.v(LOGTAG, "onTrackballEvent 2 click quit"); 3988 return true; 3989 } 3990 if (mTrackballDown) { 3991 if (LOGV_ENABLED) Log.v(LOGTAG, "onTrackballEvent down quit"); 3992 return true; // discard move if trackball is down 3993 } 3994 if (time - mTrackballUpTime < TRACKBALL_TIMEOUT) { 3995 if (LOGV_ENABLED) Log.v(LOGTAG, "onTrackballEvent up timeout quit"); 3996 return true; 3997 } 3998 // TODO: alternatively we can do panning as touch does 3999 switchOutDrawHistory(); 4000 if (time - mTrackballLastTime > TRACKBALL_TIMEOUT) { 4001 if (LOGV_ENABLED) { 4002 Log.v(LOGTAG, "onTrackballEvent time=" 4003 + time + " last=" + mTrackballLastTime); 4004 } 4005 mTrackballFirstTime = time; 4006 mTrackballXMove = mTrackballYMove = 0; 4007 } 4008 mTrackballLastTime = time; 4009 if (LOGV_ENABLED) { 4010 Log.v(LOGTAG, "onTrackballEvent ev=" + ev + " time=" + time); 4011 } 4012 mTrackballRemainsX += ev.getX(); 4013 mTrackballRemainsY += ev.getY(); 4014 doTrackball(time); 4015 return true; 4016 } 4017 4018 void moveSelection(float xRate, float yRate) { 4019 if (mNativeClass == 0) 4020 return; 4021 int width = getViewWidth(); 4022 int height = getViewHeight(); 4023 mSelectX += scaleTrackballX(xRate, width); 4024 mSelectY += scaleTrackballY(yRate, height); 4025 int maxX = width + mScrollX; 4026 int maxY = height + mScrollY; 4027 mSelectX = Math.min(maxX, Math.max(mScrollX - SELECT_CURSOR_OFFSET 4028 , mSelectX)); 4029 mSelectY = Math.min(maxY, Math.max(mScrollY - SELECT_CURSOR_OFFSET 4030 , mSelectY)); 4031 if (LOGV_ENABLED) { 4032 Log.v(LOGTAG, "moveSelection" 4033 + " mSelectX=" + mSelectX 4034 + " mSelectY=" + mSelectY 4035 + " mScrollX=" + mScrollX 4036 + " mScrollY=" + mScrollY 4037 + " xRate=" + xRate 4038 + " yRate=" + yRate 4039 ); 4040 } 4041 nativeMoveSelection(viewToContent(mSelectX) 4042 , viewToContent(mSelectY), mExtendSelection); 4043 int scrollX = mSelectX < mScrollX ? -SELECT_CURSOR_OFFSET 4044 : mSelectX > maxX - SELECT_CURSOR_OFFSET ? SELECT_CURSOR_OFFSET 4045 : 0; 4046 int scrollY = mSelectY < mScrollY ? -SELECT_CURSOR_OFFSET 4047 : mSelectY > maxY - SELECT_CURSOR_OFFSET ? SELECT_CURSOR_OFFSET 4048 : 0; 4049 pinScrollBy(scrollX, scrollY, true, 0); 4050 Rect select = new Rect(mSelectX, mSelectY, mSelectX + 1, mSelectY + 1); 4051 requestRectangleOnScreen(select); 4052 invalidate(); 4053 } 4054 4055 private int scaleTrackballX(float xRate, int width) { 4056 int xMove = (int) (xRate / TRACKBALL_SCALE * width); 4057 int nextXMove = xMove; 4058 if (xMove > 0) { 4059 if (xMove > mTrackballXMove) { 4060 xMove -= mTrackballXMove; 4061 } 4062 } else if (xMove < mTrackballXMove) { 4063 xMove -= mTrackballXMove; 4064 } 4065 mTrackballXMove = nextXMove; 4066 return xMove; 4067 } 4068 4069 private int scaleTrackballY(float yRate, int height) { 4070 int yMove = (int) (yRate / TRACKBALL_SCALE * height); 4071 int nextYMove = yMove; 4072 if (yMove > 0) { 4073 if (yMove > mTrackballYMove) { 4074 yMove -= mTrackballYMove; 4075 } 4076 } else if (yMove < mTrackballYMove) { 4077 yMove -= mTrackballYMove; 4078 } 4079 mTrackballYMove = nextYMove; 4080 return yMove; 4081 } 4082 4083 private int keyCodeToSoundsEffect(int keyCode) { 4084 switch(keyCode) { 4085 case KeyEvent.KEYCODE_DPAD_UP: 4086 return SoundEffectConstants.NAVIGATION_UP; 4087 case KeyEvent.KEYCODE_DPAD_RIGHT: 4088 return SoundEffectConstants.NAVIGATION_RIGHT; 4089 case KeyEvent.KEYCODE_DPAD_DOWN: 4090 return SoundEffectConstants.NAVIGATION_DOWN; 4091 case KeyEvent.KEYCODE_DPAD_LEFT: 4092 return SoundEffectConstants.NAVIGATION_LEFT; 4093 } 4094 throw new IllegalArgumentException("keyCode must be one of " + 4095 "{KEYCODE_DPAD_UP, KEYCODE_DPAD_RIGHT, KEYCODE_DPAD_DOWN, " + 4096 "KEYCODE_DPAD_LEFT}."); 4097 } 4098 4099 private void doTrackball(long time) { 4100 int elapsed = (int) (mTrackballLastTime - mTrackballFirstTime); 4101 if (elapsed == 0) { 4102 elapsed = TRACKBALL_TIMEOUT; 4103 } 4104 float xRate = mTrackballRemainsX * 1000 / elapsed; 4105 float yRate = mTrackballRemainsY * 1000 / elapsed; 4106 if (mShiftIsPressed) { 4107 moveSelection(xRate, yRate); 4108 mTrackballRemainsX = mTrackballRemainsY = 0; 4109 return; 4110 } 4111 float ax = Math.abs(xRate); 4112 float ay = Math.abs(yRate); 4113 float maxA = Math.max(ax, ay); 4114 if (LOGV_ENABLED) { 4115 Log.v(LOGTAG, "doTrackball elapsed=" + elapsed 4116 + " xRate=" + xRate 4117 + " yRate=" + yRate 4118 + " mTrackballRemainsX=" + mTrackballRemainsX 4119 + " mTrackballRemainsY=" + mTrackballRemainsY); 4120 } 4121 int width = mContentWidth - getViewWidth(); 4122 int height = mContentHeight - getViewHeight(); 4123 if (width < 0) width = 0; 4124 if (height < 0) height = 0; 4125 if (mTouchMode == SCROLL_ZOOM_OUT) { 4126 int oldX = mZoomScrollX; 4127 int oldY = mZoomScrollY; 4128 int maxWH = Math.max(width, height); 4129 mZoomScrollX += scaleTrackballX(xRate, maxWH); 4130 mZoomScrollY += scaleTrackballY(yRate, maxWH); 4131 if (LOGV_ENABLED) { 4132 Log.v(LOGTAG, "doTrackball SCROLL_ZOOM_OUT" 4133 + " mZoomScrollX=" + mZoomScrollX 4134 + " mZoomScrollY=" + mZoomScrollY); 4135 } 4136 mZoomScrollX = Math.min(width, Math.max(0, mZoomScrollX)); 4137 mZoomScrollY = Math.min(height, Math.max(0, mZoomScrollY)); 4138 if (oldX != mZoomScrollX || oldY != mZoomScrollY) { 4139 invalidate(); 4140 } 4141 mTrackballRemainsX = mTrackballRemainsY = 0; 4142 return; 4143 } 4144 ax = Math.abs(mTrackballRemainsX * TRACKBALL_MULTIPLIER); 4145 ay = Math.abs(mTrackballRemainsY * TRACKBALL_MULTIPLIER); 4146 maxA = Math.max(ax, ay); 4147 int count = Math.max(0, (int) maxA); 4148 int oldScrollX = mScrollX; 4149 int oldScrollY = mScrollY; 4150 if (count > 0) { 4151 int selectKeyCode = ax < ay ? mTrackballRemainsY < 0 ? 4152 KeyEvent.KEYCODE_DPAD_UP : KeyEvent.KEYCODE_DPAD_DOWN : 4153 mTrackballRemainsX < 0 ? KeyEvent.KEYCODE_DPAD_LEFT : 4154 KeyEvent.KEYCODE_DPAD_RIGHT; 4155 count = Math.min(count, TRACKBALL_MOVE_COUNT); 4156 if (LOGV_ENABLED) { 4157 Log.v(LOGTAG, "doTrackball keyCode=" + selectKeyCode 4158 + " count=" + count 4159 + " mTrackballRemainsX=" + mTrackballRemainsX 4160 + " mTrackballRemainsY=" + mTrackballRemainsY); 4161 } 4162 if (navHandledKey(selectKeyCode, count, false, time)) { 4163 playSoundEffect(keyCodeToSoundsEffect(selectKeyCode)); 4164 } 4165 mTrackballRemainsX = mTrackballRemainsY = 0; 4166 } 4167 if (count >= TRACKBALL_SCROLL_COUNT) { 4168 int xMove = scaleTrackballX(xRate, width); 4169 int yMove = scaleTrackballY(yRate, height); 4170 if (LOGV_ENABLED) { 4171 Log.v(LOGTAG, "doTrackball pinScrollBy" 4172 + " count=" + count 4173 + " xMove=" + xMove + " yMove=" + yMove 4174 + " mScrollX-oldScrollX=" + (mScrollX-oldScrollX) 4175 + " mScrollY-oldScrollY=" + (mScrollY-oldScrollY) 4176 ); 4177 } 4178 if (Math.abs(mScrollX - oldScrollX) > Math.abs(xMove)) { 4179 xMove = 0; 4180 } 4181 if (Math.abs(mScrollY - oldScrollY) > Math.abs(yMove)) { 4182 yMove = 0; 4183 } 4184 if (xMove != 0 || yMove != 0) { 4185 pinScrollBy(xMove, yMove, true, 0); 4186 } 4187 mUserScroll = true; 4188 } 4189 mWebViewCore.sendMessage(EventHub.UNBLOCK_FOCUS); 4190 } 4191 4192 public void flingScroll(int vx, int vy) { 4193 int maxX = Math.max(computeHorizontalScrollRange() - getViewWidth(), 0); 4194 int maxY = Math.max(computeVerticalScrollRange() - getViewHeight(), 0); 4195 4196 mScroller.fling(mScrollX, mScrollY, vx, vy, 0, maxX, 0, maxY); 4197 invalidate(); 4198 } 4199 4200 private void doFling() { 4201 if (mVelocityTracker == null) { 4202 return; 4203 } 4204 int maxX = Math.max(computeHorizontalScrollRange() - getViewWidth(), 0); 4205 int maxY = Math.max(computeVerticalScrollRange() - getViewHeight(), 0); 4206 4207 mVelocityTracker.computeCurrentVelocity(1000); 4208 int vx = (int) mVelocityTracker.getXVelocity(); 4209 int vy = (int) mVelocityTracker.getYVelocity(); 4210 4211 if (mSnapScrollMode != SNAP_NONE) { 4212 if (mSnapScrollMode == SNAP_X || mSnapScrollMode == SNAP_X_LOCK) { 4213 vy = 0; 4214 } else { 4215 vx = 0; 4216 } 4217 } 4218 4219 if (true /* EMG release: make our fling more like Maps' */) { 4220 // maps cuts their velocity in half 4221 vx = vx * 3 / 4; 4222 vy = vy * 3 / 4; 4223 } 4224 4225 mScroller.fling(mScrollX, mScrollY, -vx, -vy, 0, maxX, 0, maxY); 4226 // TODO: duration is calculated based on velocity, if the range is 4227 // small, the animation will stop before duration is up. We may 4228 // want to calculate how long the animation is going to run to precisely 4229 // resume the webcore update. 4230 final int time = mScroller.getDuration(); 4231 mPrivateHandler.sendEmptyMessageDelayed(RESUME_WEBCORE_UPDATE, time); 4232 invalidate(); 4233 } 4234 4235 private boolean zoomWithPreview(float scale) { 4236 float oldScale = mActualScale; 4237 4238 // snap to 100% if it is close 4239 if (scale > 0.95f && scale < 1.05f) { 4240 scale = 1.0f; 4241 } 4242 4243 setNewZoomScale(scale, false); 4244 4245 if (oldScale != mActualScale) { 4246 // use mZoomPickerScale to see zoom preview first 4247 mZoomStart = SystemClock.uptimeMillis(); 4248 mInvInitialZoomScale = 1.0f / oldScale; 4249 mInvFinalZoomScale = 1.0f / mActualScale; 4250 mZoomScale = mActualScale; 4251 invalidate(); 4252 return true; 4253 } else { 4254 return false; 4255 } 4256 } 4257 4258 /** 4259 * Returns a view containing zoom controls i.e. +/- buttons. The caller is 4260 * in charge of installing this view to the view hierarchy. This view will 4261 * become visible when the user starts scrolling via touch and fade away if 4262 * the user does not interact with it. 4263 * <p/> 4264 * API version 3 introduces a built-in zoom mechanism that is shown 4265 * automatically by the MapView. This is the preferred approach for 4266 * showing the zoom UI. 4267 * 4268 * @deprecated The built-in zoom mechanism is preferred, see 4269 * {@link WebSettings#setBuiltInZoomControls(boolean)}. 4270 */ 4271 @Deprecated 4272 public View getZoomControls() { 4273 if (!getSettings().supportZoom()) { 4274 Log.w(LOGTAG, "This WebView doesn't support zoom."); 4275 return null; 4276 } 4277 if (mZoomControls == null) { 4278 mZoomControls = createZoomControls(); 4279 4280 /* 4281 * need to be set to VISIBLE first so that getMeasuredHeight() in 4282 * {@link #onSizeChanged()} can return the measured value for proper 4283 * layout. 4284 */ 4285 mZoomControls.setVisibility(View.VISIBLE); 4286 mZoomControlRunnable = new Runnable() { 4287 public void run() { 4288 4289 /* Don't dismiss the controls if the user has 4290 * focus on them. Wait and check again later. 4291 */ 4292 if (!mZoomControls.hasFocus()) { 4293 mZoomControls.hide(); 4294 } else { 4295 mPrivateHandler.removeCallbacks(mZoomControlRunnable); 4296 mPrivateHandler.postDelayed(mZoomControlRunnable, 4297 ZOOM_CONTROLS_TIMEOUT); 4298 } 4299 } 4300 }; 4301 } 4302 return mZoomControls; 4303 } 4304 4305 private ExtendedZoomControls createZoomControls() { 4306 ExtendedZoomControls zoomControls = new ExtendedZoomControls(mContext 4307 , null); 4308 zoomControls.setOnZoomInClickListener(new OnClickListener() { 4309 public void onClick(View v) { 4310 // reset time out 4311 mPrivateHandler.removeCallbacks(mZoomControlRunnable); 4312 mPrivateHandler.postDelayed(mZoomControlRunnable, 4313 ZOOM_CONTROLS_TIMEOUT); 4314 zoomIn(); 4315 } 4316 }); 4317 zoomControls.setOnZoomOutClickListener(new OnClickListener() { 4318 public void onClick(View v) { 4319 // reset time out 4320 mPrivateHandler.removeCallbacks(mZoomControlRunnable); 4321 mPrivateHandler.postDelayed(mZoomControlRunnable, 4322 ZOOM_CONTROLS_TIMEOUT); 4323 zoomOut(); 4324 } 4325 }); 4326 zoomControls.setOnZoomMagnifyClickListener(new OnClickListener() { 4327 public void onClick(View v) { 4328 mPrivateHandler.removeCallbacks(mZoomControlRunnable); 4329 mPrivateHandler.postDelayed(mZoomControlRunnable, 4330 ZOOM_CONTROLS_TIMEOUT); 4331 zoomScrollOut(); 4332 } 4333 }); 4334 return zoomControls; 4335 } 4336 4337 /** 4338 * Gets the {@link ZoomButtonsController} which can be used to add 4339 * additional buttons to the zoom controls window. 4340 * 4341 * @return The instance of {@link ZoomButtonsController} used by this class, 4342 * or null if it is unavailable. 4343 * @hide 4344 */ 4345 public ZoomButtonsController getZoomButtonsController() { 4346 return mZoomButtonsController; 4347 } 4348 4349 /** 4350 * Perform zoom in in the webview 4351 * @return TRUE if zoom in succeeds. FALSE if no zoom changes. 4352 */ 4353 public boolean zoomIn() { 4354 // TODO: alternatively we can disallow this during draw history mode 4355 switchOutDrawHistory(); 4356 return zoomWithPreview(mActualScale * 1.25f); 4357 } 4358 4359 /** 4360 * Perform zoom out in the webview 4361 * @return TRUE if zoom out succeeds. FALSE if no zoom changes. 4362 */ 4363 public boolean zoomOut() { 4364 // TODO: alternatively we can disallow this during draw history mode 4365 switchOutDrawHistory(); 4366 return zoomWithPreview(mActualScale * 0.8f); 4367 } 4368 4369 private void updateSelection() { 4370 if (mNativeClass == 0) { 4371 return; 4372 } 4373 // mLastTouchX and mLastTouchY are the point in the current viewport 4374 int contentX = viewToContent((int) mLastTouchX + mScrollX); 4375 int contentY = viewToContent((int) mLastTouchY + mScrollY); 4376 Rect rect = new Rect(contentX - mNavSlop, contentY - mNavSlop, 4377 contentX + mNavSlop, contentY + mNavSlop); 4378 nativeSelectBestAt(rect); 4379 } 4380 4381 /*package*/ void shortPressOnTextField() { 4382 if (inEditingMode()) { 4383 View v = mTextEntry; 4384 int x = viewToContent((v.getLeft() + v.getRight()) >> 1); 4385 int y = viewToContent((v.getTop() + v.getBottom()) >> 1); 4386 nativeMotionUp(x, y, mNavSlop); 4387 } 4388 } 4389 4390 private void doShortPress() { 4391 if (mNativeClass == 0) { 4392 return; 4393 } 4394 switchOutDrawHistory(); 4395 // mLastTouchX and mLastTouchY are the point in the current viewport 4396 int contentX = viewToContent((int) mLastTouchX + mScrollX); 4397 int contentY = viewToContent((int) mLastTouchY + mScrollY); 4398 if (nativeMotionUp(contentX, contentY, mNavSlop)) { 4399 if (mLogEvent) { 4400 Checkin.updateStats(mContext.getContentResolver(), 4401 Checkin.Stats.Tag.BROWSER_SNAP_CENTER, 1, 0.0); 4402 } 4403 } 4404 if (nativeHasCursorNode() && !nativeCursorIsTextInput()) { 4405 playSoundEffect(SoundEffectConstants.CLICK); 4406 } 4407 } 4408 4409 // Called by JNI to handle a touch on a node representing an email address, 4410 // address, or phone number 4411 private void overrideLoading(String url) { 4412 mCallbackProxy.uiOverrideUrlLoading(url); 4413 } 4414 4415 @Override 4416 public boolean requestFocus(int direction, Rect previouslyFocusedRect) { 4417 boolean result = false; 4418 if (inEditingMode()) { 4419 result = mTextEntry.requestFocus(direction, previouslyFocusedRect); 4420 } else { 4421 result = super.requestFocus(direction, previouslyFocusedRect); 4422 if (mWebViewCore.getSettings().getNeedInitialFocus()) { 4423 // For cases such as GMail, where we gain focus from a direction, 4424 // we want to move to the first available link. 4425 // FIXME: If there are no visible links, we may not want to 4426 int fakeKeyDirection = 0; 4427 switch(direction) { 4428 case View.FOCUS_UP: 4429 fakeKeyDirection = KeyEvent.KEYCODE_DPAD_UP; 4430 break; 4431 case View.FOCUS_DOWN: 4432 fakeKeyDirection = KeyEvent.KEYCODE_DPAD_DOWN; 4433 break; 4434 case View.FOCUS_LEFT: 4435 fakeKeyDirection = KeyEvent.KEYCODE_DPAD_LEFT; 4436 break; 4437 case View.FOCUS_RIGHT: 4438 fakeKeyDirection = KeyEvent.KEYCODE_DPAD_RIGHT; 4439 break; 4440 default: 4441 return result; 4442 } 4443 if (mNativeClass != 0 && !nativeHasCursorNode()) { 4444 navHandledKey(fakeKeyDirection, 1, true, 0); 4445 } 4446 } 4447 } 4448 return result; 4449 } 4450 4451 @Override 4452 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 4453 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 4454 4455 int heightMode = MeasureSpec.getMode(heightMeasureSpec); 4456 int heightSize = MeasureSpec.getSize(heightMeasureSpec); 4457 int widthMode = MeasureSpec.getMode(widthMeasureSpec); 4458 int widthSize = MeasureSpec.getSize(widthMeasureSpec); 4459 4460 int measuredHeight = heightSize; 4461 int measuredWidth = widthSize; 4462 4463 // Grab the content size from WebViewCore. 4464 int contentHeight = mContentHeight; 4465 int contentWidth = mContentWidth; 4466 4467// Log.d(LOGTAG, "------- measure " + heightMode); 4468 4469 if (heightMode != MeasureSpec.EXACTLY) { 4470 mHeightCanMeasure = true; 4471 measuredHeight = contentHeight; 4472 if (heightMode == MeasureSpec.AT_MOST) { 4473 // If we are larger than the AT_MOST height, then our height can 4474 // no longer be measured and we should scroll internally. 4475 if (measuredHeight > heightSize) { 4476 measuredHeight = heightSize; 4477 mHeightCanMeasure = false; 4478 } 4479 } 4480 } else { 4481 mHeightCanMeasure = false; 4482 } 4483 if (mNativeClass != 0) { 4484 nativeSetHeightCanMeasure(mHeightCanMeasure); 4485 } 4486 // For the width, always use the given size unless unspecified. 4487 if (widthMode == MeasureSpec.UNSPECIFIED) { 4488 mWidthCanMeasure = true; 4489 measuredWidth = contentWidth; 4490 } else { 4491 mWidthCanMeasure = false; 4492 } 4493 4494 synchronized (this) { 4495 setMeasuredDimension(measuredWidth, measuredHeight); 4496 } 4497 } 4498 4499 @Override 4500 public boolean requestChildRectangleOnScreen(View child, 4501 Rect rect, 4502 boolean immediate) { 4503 rect.offset(child.getLeft() - child.getScrollX(), 4504 child.getTop() - child.getScrollY()); 4505 4506 int height = getHeight() - getHorizontalScrollbarHeight(); 4507 int screenTop = mScrollY; 4508 int screenBottom = screenTop + height; 4509 4510 int scrollYDelta = 0; 4511 4512 if (rect.bottom > screenBottom) { 4513 int oneThirdOfScreenHeight = height / 3; 4514 if (rect.height() > 2 * oneThirdOfScreenHeight) { 4515 // If the rectangle is too tall to fit in the bottom two thirds 4516 // of the screen, place it at the top. 4517 scrollYDelta = rect.top - screenTop; 4518 } else { 4519 // If the rectangle will still fit on screen, we want its 4520 // top to be in the top third of the screen. 4521 scrollYDelta = rect.top - (screenTop + oneThirdOfScreenHeight); 4522 } 4523 } else if (rect.top < screenTop) { 4524 scrollYDelta = rect.top - screenTop; 4525 } 4526 4527 int width = getWidth() - getVerticalScrollbarWidth(); 4528 int screenLeft = mScrollX; 4529 int screenRight = screenLeft + width; 4530 4531 int scrollXDelta = 0; 4532 4533 if (rect.right > screenRight && rect.left > screenLeft) { 4534 if (rect.width() > width) { 4535 scrollXDelta += (rect.left - screenLeft); 4536 } else { 4537 scrollXDelta += (rect.right - screenRight); 4538 } 4539 } else if (rect.left < screenLeft) { 4540 scrollXDelta -= (screenLeft - rect.left); 4541 } 4542 4543 if ((scrollYDelta | scrollXDelta) != 0) { 4544 return pinScrollBy(scrollXDelta, scrollYDelta, !immediate, 0); 4545 } 4546 4547 return false; 4548 } 4549 4550 /* package */ void replaceTextfieldText(int oldStart, int oldEnd, 4551 String replace, int newStart, int newEnd) { 4552 HashMap arg = new HashMap(); 4553 arg.put("focusData", cursorData()); 4554 arg.put("replace", replace); 4555 arg.put("start", Integer.valueOf(newStart)); 4556 arg.put("end", Integer.valueOf(newEnd)); 4557 mTextGeneration++; 4558 mWebViewCore.sendMessage(EventHub.REPLACE_TEXT, oldStart, oldEnd, arg); 4559 } 4560 4561 /* package */ void passToJavaScript(String currentText, KeyEvent event) { 4562 HashMap arg = new HashMap(); 4563 arg.put("focusData", cursorData()); 4564 arg.put("event", event); 4565 arg.put("currentText", currentText); 4566 // Increase our text generation number, and pass it to webcore thread 4567 mTextGeneration++; 4568 mWebViewCore.sendMessage(EventHub.PASS_TO_JS, mTextGeneration, 0, arg); 4569 // WebKit's document state is not saved until about to leave the page. 4570 // To make sure the host application, like Browser, has the up to date 4571 // document state when it goes to background, we force to save the 4572 // document state. 4573 mWebViewCore.removeMessages(EventHub.SAVE_DOCUMENT_STATE); 4574 mWebViewCore.sendMessageDelayed(EventHub.SAVE_DOCUMENT_STATE, 4575 cursorData(), 1000); 4576 } 4577 4578 /* package */ WebViewCore getWebViewCore() { 4579 return mWebViewCore; 4580 } 4581 4582 //------------------------------------------------------------------------- 4583 // Methods can be called from a separate thread, like WebViewCore 4584 // If it needs to call the View system, it has to send message. 4585 //------------------------------------------------------------------------- 4586 4587 /** 4588 * General handler to receive message coming from webkit thread 4589 */ 4590 class PrivateHandler extends Handler { 4591 @Override 4592 public void handleMessage(Message msg) { 4593 if (LOGV_ENABLED) { 4594 Log.v(LOGTAG, msg.what < REMEMBER_PASSWORD || msg.what 4595 > INVAL_RECT_MSG_ID ? Integer.toString(msg.what) 4596 : HandlerDebugString[msg.what - REMEMBER_PASSWORD]); 4597 } 4598 switch (msg.what) { 4599 case REMEMBER_PASSWORD: { 4600 mDatabase.setUsernamePassword( 4601 msg.getData().getString("host"), 4602 msg.getData().getString("username"), 4603 msg.getData().getString("password")); 4604 ((Message) msg.obj).sendToTarget(); 4605 break; 4606 } 4607 case NEVER_REMEMBER_PASSWORD: { 4608 mDatabase.setUsernamePassword( 4609 msg.getData().getString("host"), null, null); 4610 ((Message) msg.obj).sendToTarget(); 4611 break; 4612 } 4613 case SWITCH_TO_SHORTPRESS: { 4614 if (mTouchMode == TOUCH_INIT_MODE) { 4615 mTouchMode = TOUCH_SHORTPRESS_START_MODE; 4616 updateSelection(); 4617 } 4618 break; 4619 } 4620 case SWITCH_TO_LONGPRESS: { 4621 mTouchMode = TOUCH_DONE_MODE; 4622 performLongClick(); 4623 updateTextEntry(); 4624 break; 4625 } 4626 case SWITCH_TO_CLICK: 4627 mTouchMode = TOUCH_DONE_MODE; 4628 Rect visibleRect = sendOurVisibleRect(); 4629 // Note that sendOurVisibleRect calls viewToContent, so the 4630 // coordinates should be in content coordinates. 4631 if (!nativeCursorIntersects(visibleRect)) { 4632 break; 4633 } 4634 nativeSetFollowedLink(true); 4635 mWebViewCore.sendMessage(EventHub.SET_MOVE_MOUSE, 4636 cursorData()); 4637 playSoundEffect(SoundEffectConstants.CLICK); 4638 if (!mCallbackProxy.uiOverrideUrlLoading(nativeCursorText())) { 4639 mWebViewCore.sendMessage(EventHub.CLICK); 4640 } 4641 break; 4642 case SCROLL_BY_MSG_ID: 4643 setContentScrollBy(msg.arg1, msg.arg2, (Boolean) msg.obj); 4644 break; 4645 case SYNC_SCROLL_TO_MSG_ID: 4646 if (mUserScroll) { 4647 // if user has scrolled explicitly, don't sync the 4648 // scroll position any more 4649 mUserScroll = false; 4650 break; 4651 } 4652 // fall through 4653 case SCROLL_TO_MSG_ID: 4654 if (setContentScrollTo(msg.arg1, msg.arg2)) { 4655 // if we can't scroll to the exact position due to pin, 4656 // send a message to WebCore to re-scroll when we get a 4657 // new picture 4658 mUserScroll = false; 4659 mWebViewCore.sendMessage(EventHub.SYNC_SCROLL, 4660 msg.arg1, msg.arg2); 4661 } 4662 break; 4663 case SPAWN_SCROLL_TO_MSG_ID: 4664 spawnContentScrollTo(msg.arg1, msg.arg2); 4665 break; 4666 case NEW_PICTURE_MSG_ID: 4667 // called for new content 4668 final WebViewCore.DrawData draw = 4669 (WebViewCore.DrawData) msg.obj; 4670 final Point viewSize = draw.mViewPoint; 4671 if (mZoomScale > 0) { 4672 // use the same logic in sendViewSizeZoom() to make sure 4673 // the mZoomScale has matched the viewSize so that we 4674 // can clear mZoomScale 4675 if (Math.round(getViewWidth() / mZoomScale) == viewSize.x) { 4676 mZoomScale = 0; 4677 mWebViewCore.sendMessage(EventHub.SET_SNAP_ANCHOR, 4678 0, 0); 4679 } 4680 } 4681 if (!mMinZoomScaleFixed) { 4682 mMinZoomScale = (float) getViewWidth() 4683 / Math.max(ZOOM_OUT_WIDTH, draw.mWidthHeight.x); 4684 } 4685 // We update the layout (i.e. request a layout from the 4686 // view system) if the last view size that we sent to 4687 // WebCore matches the view size of the picture we just 4688 // received in the fixed dimension. 4689 final boolean updateLayout = viewSize.x == mLastWidthSent 4690 && viewSize.y == mLastHeightSent; 4691 recordNewContentSize(draw.mWidthHeight.x, 4692 draw.mWidthHeight.y, updateLayout); 4693 if (LOGV_ENABLED) { 4694 Rect b = draw.mInvalRegion.getBounds(); 4695 Log.v(LOGTAG, "NEW_PICTURE_MSG_ID {" + 4696 b.left+","+b.top+","+b.right+","+b.bottom+"}"); 4697 } 4698 invalidate(contentToView(draw.mInvalRegion.getBounds())); 4699 if (mPictureListener != null) { 4700 mPictureListener.onNewPicture(WebView.this, capturePicture()); 4701 } 4702 break; 4703 case WEBCORE_INITIALIZED_MSG_ID: 4704 // nativeCreate sets mNativeClass to a non-zero value 4705 nativeCreate(msg.arg1); 4706 break; 4707 case UPDATE_TEXTFIELD_TEXT_MSG_ID: 4708 // Make sure that the textfield is currently focused 4709 // and representing the same node as the pointer. 4710 if (inEditingMode() && 4711 mTextEntry.isSameTextField(msg.arg1)) { 4712 if (msg.getData().getBoolean("password")) { 4713 Spannable text = (Spannable) mTextEntry.getText(); 4714 int start = Selection.getSelectionStart(text); 4715 int end = Selection.getSelectionEnd(text); 4716 mTextEntry.setInPassword(true); 4717 // Restore the selection, which may have been 4718 // ruined by setInPassword. 4719 Spannable pword = (Spannable) mTextEntry.getText(); 4720 Selection.setSelection(pword, start, end); 4721 // If the text entry has created more events, ignore 4722 // this one. 4723 } else if (msg.arg2 == mTextGeneration) { 4724 mTextEntry.setTextAndKeepSelection( 4725 (String) msg.obj); 4726 } 4727 } 4728 break; 4729 case DID_FIRST_LAYOUT_MSG_ID: 4730 if (mNativeClass == 0) { 4731 break; 4732 } 4733// Do not reset the focus or clear the text; the user may have already 4734// navigated or entered text at this point. The focus should have gotten 4735// reset, if need be, when the focus cache was built. Similarly, the text 4736// view should already be torn down and rebuilt if needed. 4737// nativeResetFocus(); 4738// clearTextEntry(); 4739 HashMap scaleLimit = (HashMap) msg.obj; 4740 int minScale = (Integer) scaleLimit.get("minScale"); 4741 if (minScale == 0) { 4742 mMinZoomScale = DEFAULT_MIN_ZOOM_SCALE; 4743 mMinZoomScaleFixed = false; 4744 } else { 4745 mMinZoomScale = (float) (minScale / 100.0); 4746 mMinZoomScaleFixed = true; 4747 } 4748 int maxScale = (Integer) scaleLimit.get("maxScale"); 4749 if (maxScale == 0) { 4750 mMaxZoomScale = DEFAULT_MAX_ZOOM_SCALE; 4751 } else { 4752 mMaxZoomScale = (float) (maxScale / 100.0); 4753 } 4754 // If history Picture is drawn, don't update zoomWidth 4755 if (mDrawHistory) { 4756 break; 4757 } 4758 int width = getViewWidth(); 4759 if (width == 0) { 4760 break; 4761 } 4762 int initialScale = msg.arg1; 4763 int viewportWidth = msg.arg2; 4764 // by default starting a new page with 100% zoom scale. 4765 float scale = 1.0f; 4766 if (mInitialScale > 0) { 4767 scale = mInitialScale / 100.0f; 4768 } else { 4769 if (initialScale < 0) break; 4770 if (mWebViewCore.getSettings().getUseWideViewPort()) { 4771 // force viewSizeChanged by setting mLastWidthSent 4772 // to 0 4773 mLastWidthSent = 0; 4774 } 4775 if (initialScale == 0) { 4776 // if viewportWidth is defined and it is smaller 4777 // than the view width, zoom in to fill the view 4778 if (viewportWidth > 0 && viewportWidth < width) { 4779 scale = (float) width / viewportWidth; 4780 } 4781 } else { 4782 scale = initialScale / 100.0f; 4783 } 4784 } 4785 setNewZoomScale(scale, false); 4786 break; 4787 case MARK_NODE_INVALID_ID: 4788 nativeMarkNodeInvalid(msg.arg1); 4789 break; 4790 case UPDATE_TEXT_ENTRY_MSG_ID: 4791 // this is sent after finishing resize in WebViewCore. Make 4792 // sure the text edit box is still on the screen. 4793 if (inEditingMode() && nativeCursorIsTextInput()) { 4794 mTextEntry.bringIntoView(); 4795 } 4796 updateTextEntry(); 4797 break; 4798 case RECOMPUTE_FOCUS_MSG_ID: 4799 if (mNativeClass != 0) { 4800 nativeRecomputeFocus(); 4801 } 4802 break; 4803 case INVAL_RECT_MSG_ID: { 4804 Rect r = (Rect)msg.obj; 4805 if (r == null) { 4806 invalidate(); 4807 } else { 4808 // we need to scale r from content into view coords, 4809 // which viewInvalidate() does for us 4810 viewInvalidate(r.left, r.top, r.right, r.bottom); 4811 } 4812 break; 4813 } 4814 case UPDATE_TEXT_ENTRY_ADAPTER: 4815 HashMap data = (HashMap) msg.obj; 4816 if (mTextEntry.isSameTextField(msg.arg1)) { 4817 AutoCompleteAdapter adapter = 4818 (AutoCompleteAdapter) data.get("adapter"); 4819 mTextEntry.setAdapterCustom(adapter); 4820 } 4821 break; 4822 case UPDATE_CLIPBOARD: 4823 String str = (String) msg.obj; 4824 if (LOGV_ENABLED) { 4825 Log.v(LOGTAG, "UPDATE_CLIPBOARD " + str); 4826 } 4827 try { 4828 IClipboard clip = IClipboard.Stub.asInterface( 4829 ServiceManager.getService("clipboard")); 4830 clip.setClipboardText(str); 4831 } catch (android.os.RemoteException e) { 4832 Log.e(LOGTAG, "Clipboard failed", e); 4833 } 4834 break; 4835 case RESUME_WEBCORE_UPDATE: 4836 WebViewCore.resumeUpdate(mWebViewCore); 4837 break; 4838 4839 case LONG_PRESS_ENTER: 4840 // as this is shared by keydown and trackballdown, reset all 4841 // the states 4842 mGotEnterDown = false; 4843 mTrackballDown = false; 4844 // LONG_PRESS_ENTER is sent as a delayed message. If we 4845 // switch to windows overview, the WebView will be 4846 // temporarily removed from the view system. In that case, 4847 // do nothing. 4848 if (getParent() != null) { 4849 performLongClick(); 4850 } 4851 break; 4852 4853 case WEBCORE_NEED_TOUCH_EVENTS: 4854 mForwardTouchEvents = (msg.arg1 != 0); 4855 break; 4856 4857 case PREVENT_TOUCH_ID: 4858 if (msg.arg1 == MotionEvent.ACTION_DOWN) { 4859 mPreventDrag = msg.arg2 == 1; 4860 if (mPreventDrag) { 4861 mTouchMode = TOUCH_DONE_MODE; 4862 } 4863 } 4864 break; 4865 4866 default: 4867 super.handleMessage(msg); 4868 break; 4869 } 4870 } 4871 } 4872 4873 // Class used to use a dropdown for a <select> element 4874 private class InvokeListBox implements Runnable { 4875 // Whether the listbox allows multiple selection. 4876 private boolean mMultiple; 4877 // Passed in to a list with multiple selection to tell 4878 // which items are selected. 4879 private int[] mSelectedArray; 4880 // Passed in to a list with single selection to tell 4881 // where the initial selection is. 4882 private int mSelection; 4883 4884 private Container[] mContainers; 4885 4886 // Need these to provide stable ids to my ArrayAdapter, 4887 // which normally does not have stable ids. (Bug 1250098) 4888 private class Container extends Object { 4889 String mString; 4890 boolean mEnabled; 4891 int mId; 4892 4893 public String toString() { 4894 return mString; 4895 } 4896 } 4897 4898 /** 4899 * Subclass ArrayAdapter so we can disable OptionGroupLabels, 4900 * and allow filtering. 4901 */ 4902 private class MyArrayListAdapter extends ArrayAdapter<Container> { 4903 public MyArrayListAdapter(Context context, Container[] objects, boolean multiple) { 4904 super(context, 4905 multiple ? com.android.internal.R.layout.select_dialog_multichoice : 4906 com.android.internal.R.layout.select_dialog_singlechoice, 4907 objects); 4908 } 4909 4910 @Override 4911 public boolean hasStableIds() { 4912 // AdapterView's onChanged method uses this to determine whether 4913 // to restore the old state. Return false so that the old (out 4914 // of date) state does not replace the new, valid state. 4915 return false; 4916 } 4917 4918 private Container item(int position) { 4919 if (position < 0 || position >= getCount()) { 4920 return null; 4921 } 4922 return (Container) getItem(position); 4923 } 4924 4925 @Override 4926 public long getItemId(int position) { 4927 Container item = item(position); 4928 if (item == null) { 4929 return -1; 4930 } 4931 return item.mId; 4932 } 4933 4934 @Override 4935 public boolean areAllItemsEnabled() { 4936 return false; 4937 } 4938 4939 @Override 4940 public boolean isEnabled(int position) { 4941 Container item = item(position); 4942 if (item == null) { 4943 return false; 4944 } 4945 return item.mEnabled; 4946 } 4947 } 4948 4949 private InvokeListBox(String[] array, 4950 boolean[] enabled, int[] selected) { 4951 mMultiple = true; 4952 mSelectedArray = selected; 4953 4954 int length = array.length; 4955 mContainers = new Container[length]; 4956 for (int i = 0; i < length; i++) { 4957 mContainers[i] = new Container(); 4958 mContainers[i].mString = array[i]; 4959 mContainers[i].mEnabled = enabled[i]; 4960 mContainers[i].mId = i; 4961 } 4962 } 4963 4964 private InvokeListBox(String[] array, boolean[] enabled, int 4965 selection) { 4966 mSelection = selection; 4967 mMultiple = false; 4968 4969 int length = array.length; 4970 mContainers = new Container[length]; 4971 for (int i = 0; i < length; i++) { 4972 mContainers[i] = new Container(); 4973 mContainers[i].mString = array[i]; 4974 mContainers[i].mEnabled = enabled[i]; 4975 mContainers[i].mId = i; 4976 } 4977 } 4978 4979 /* 4980 * Whenever the data set changes due to filtering, this class ensures 4981 * that the checked item remains checked. 4982 */ 4983 private class SingleDataSetObserver extends DataSetObserver { 4984 private long mCheckedId; 4985 private ListView mListView; 4986 private Adapter mAdapter; 4987 4988 /* 4989 * Create a new observer. 4990 * @param id The ID of the item to keep checked. 4991 * @param l ListView for getting and clearing the checked states 4992 * @param a Adapter for getting the IDs 4993 */ 4994 public SingleDataSetObserver(long id, ListView l, Adapter a) { 4995 mCheckedId = id; 4996 mListView = l; 4997 mAdapter = a; 4998 } 4999 5000 public void onChanged() { 5001 // The filter may have changed which item is checked. Find the 5002 // item that the ListView thinks is checked. 5003 int position = mListView.getCheckedItemPosition(); 5004 long id = mAdapter.getItemId(position); 5005 if (mCheckedId != id) { 5006 // Clear the ListView's idea of the checked item, since 5007 // it is incorrect 5008 mListView.clearChoices(); 5009 // Search for mCheckedId. If it is in the filtered list, 5010 // mark it as checked 5011 int count = mAdapter.getCount(); 5012 for (int i = 0; i < count; i++) { 5013 if (mAdapter.getItemId(i) == mCheckedId) { 5014 mListView.setItemChecked(i, true); 5015 break; 5016 } 5017 } 5018 } 5019 } 5020 5021 public void onInvalidate() {} 5022 } 5023 5024 public void run() { 5025 final ListView listView = (ListView) LayoutInflater.from(mContext) 5026 .inflate(com.android.internal.R.layout.select_dialog, null); 5027 final MyArrayListAdapter adapter = new 5028 MyArrayListAdapter(mContext, mContainers, mMultiple); 5029 AlertDialog.Builder b = new AlertDialog.Builder(mContext) 5030 .setView(listView).setCancelable(true) 5031 .setInverseBackgroundForced(true); 5032 5033 if (mMultiple) { 5034 b.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() { 5035 public void onClick(DialogInterface dialog, int which) { 5036 mWebViewCore.sendMessage( 5037 EventHub.LISTBOX_CHOICES, 5038 adapter.getCount(), 0, 5039 listView.getCheckedItemPositions()); 5040 }}); 5041 b.setNegativeButton(android.R.string.cancel, 5042 new DialogInterface.OnClickListener() { 5043 public void onClick(DialogInterface dialog, int which) { 5044 mWebViewCore.sendMessage( 5045 EventHub.SINGLE_LISTBOX_CHOICE, -2, 0); 5046 }}); 5047 } 5048 final AlertDialog dialog = b.create(); 5049 listView.setAdapter(adapter); 5050 listView.setFocusableInTouchMode(true); 5051 // There is a bug (1250103) where the checks in a ListView with 5052 // multiple items selected are associated with the positions, not 5053 // the ids, so the items do not properly retain their checks when 5054 // filtered. Do not allow filtering on multiple lists until 5055 // that bug is fixed. 5056 5057 listView.setTextFilterEnabled(!mMultiple); 5058 if (mMultiple) { 5059 listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE); 5060 int length = mSelectedArray.length; 5061 for (int i = 0; i < length; i++) { 5062 listView.setItemChecked(mSelectedArray[i], true); 5063 } 5064 } else { 5065 listView.setOnItemClickListener(new OnItemClickListener() { 5066 public void onItemClick(AdapterView parent, View v, 5067 int position, long id) { 5068 mWebViewCore.sendMessage( 5069 EventHub.SINGLE_LISTBOX_CHOICE, (int)id, 0); 5070 dialog.dismiss(); 5071 } 5072 }); 5073 if (mSelection != -1) { 5074 listView.setSelection(mSelection); 5075 listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE); 5076 listView.setItemChecked(mSelection, true); 5077 DataSetObserver observer = new SingleDataSetObserver( 5078 adapter.getItemId(mSelection), listView, adapter); 5079 adapter.registerDataSetObserver(observer); 5080 } 5081 } 5082 dialog.setOnCancelListener(new DialogInterface.OnCancelListener() { 5083 public void onCancel(DialogInterface dialog) { 5084 mWebViewCore.sendMessage( 5085 EventHub.SINGLE_LISTBOX_CHOICE, -2, 0); 5086 } 5087 }); 5088 dialog.show(); 5089 } 5090 } 5091 5092 /* 5093 * Request a dropdown menu for a listbox with multiple selection. 5094 * 5095 * @param array Labels for the listbox. 5096 * @param enabledArray Which positions are enabled. 5097 * @param selectedArray Which positions are initally selected. 5098 */ 5099 void requestListBox(String[] array, boolean[]enabledArray, int[] 5100 selectedArray) { 5101 mPrivateHandler.post( 5102 new InvokeListBox(array, enabledArray, selectedArray)); 5103 } 5104 5105 /* 5106 * Request a dropdown menu for a listbox with single selection or a single 5107 * <select> element. 5108 * 5109 * @param array Labels for the listbox. 5110 * @param enabledArray Which positions are enabled. 5111 * @param selection Which position is initally selected. 5112 */ 5113 void requestListBox(String[] array, boolean[]enabledArray, int selection) { 5114 mPrivateHandler.post( 5115 new InvokeListBox(array, enabledArray, selection)); 5116 } 5117 5118 // called by JNI 5119 private void sendMoveMouse(int frame, int node, int x, int y) { 5120 mWebViewCore.sendMessage(EventHub.SET_MOVE_MOUSE, 5121 new WebViewCore.CursorData(frame, node, x, y)); 5122 } 5123 5124 // called by JNI 5125 private void sendMoveMouseIfLatest() { 5126 mWebViewCore.sendMessage(EventHub.SET_MOVE_MOUSE_IF_LATEST, cursorData()); 5127 } 5128 5129 // called by JNI 5130 private void sendMotionUp(int touchGeneration, 5131 int frame, int node, int x, int y, int size) { 5132 WebViewCore.TouchUpData touchUpData = new WebViewCore.TouchUpData(); 5133 touchUpData.mMoveGeneration = touchGeneration; 5134 touchUpData.mSize = size; 5135 touchUpData.mFrame = frame; 5136 touchUpData.mNode = node; 5137 touchUpData.mX = x; 5138 touchUpData.mY = y; 5139 mWebViewCore.sendMessage(EventHub.TOUCH_UP, touchUpData); 5140 } 5141 5142 5143 private int getScaledMaxXScroll() { 5144 int width; 5145 if (mHeightCanMeasure == false) { 5146 width = getViewWidth() / 4; 5147 } else { 5148 Rect visRect = new Rect(); 5149 calcOurVisibleRect(visRect); 5150 width = visRect.width() / 2; 5151 } 5152 // FIXME the divisor should be retrieved from somewhere 5153 return viewToContent(width); 5154 } 5155 5156 private int getScaledMaxYScroll() { 5157 int height; 5158 if (mHeightCanMeasure == false) { 5159 height = getViewHeight() / 4; 5160 } else { 5161 Rect visRect = new Rect(); 5162 calcOurVisibleRect(visRect); 5163 height = visRect.height() / 2; 5164 } 5165 // FIXME the divisor should be retrieved from somewhere 5166 // the closest thing today is hard-coded into ScrollView.java 5167 // (from ScrollView.java, line 363) int maxJump = height/2; 5168 return viewToContent(height); 5169 } 5170 5171 /** 5172 * Called by JNI to invalidate view 5173 */ 5174 private void viewInvalidate() { 5175 invalidate(); 5176 } 5177 5178 // return true if the key was handled 5179 private boolean navHandledKey(int keyCode, int count, boolean noScroll 5180 , long time) { 5181 if (mNativeClass == 0) { 5182 return false; 5183 } 5184 mLastFocusTime = time; 5185 mLastFocusBounds = nativeGetCursorRingBounds(); 5186 boolean keyHandled = nativeMoveFocus(keyCode, count, noScroll) == false; 5187 if (LOGV_ENABLED) { 5188 Log.v(LOGTAG, "navHandledKey mLastFocusBounds=" + mLastFocusBounds 5189 + " mLastFocusTime=" + mLastFocusTime 5190 + " handled=" + keyHandled); 5191 } 5192 if (keyHandled == false || mHeightCanMeasure == false) { 5193 return keyHandled; 5194 } 5195 Rect contentFocus = nativeGetCursorRingBounds(); 5196 if (contentFocus.isEmpty()) return keyHandled; 5197 Rect viewFocus = contentToView(contentFocus); 5198 Rect visRect = new Rect(); 5199 calcOurVisibleRect(visRect); 5200 Rect outset = new Rect(visRect); 5201 int maxXScroll = visRect.width() / 2; 5202 int maxYScroll = visRect.height() / 2; 5203 outset.inset(-maxXScroll, -maxYScroll); 5204 if (Rect.intersects(outset, viewFocus) == false) { 5205 return keyHandled; 5206 } 5207 // FIXME: Necessary because ScrollView/ListView do not scroll left/right 5208 int maxH = Math.min(viewFocus.right - visRect.right, maxXScroll); 5209 if (maxH > 0) { 5210 pinScrollBy(maxH, 0, true, 0); 5211 } else { 5212 maxH = Math.max(viewFocus.left - visRect.left, -maxXScroll); 5213 if (maxH < 0) { 5214 pinScrollBy(maxH, 0, true, 0); 5215 } 5216 } 5217 if (mLastFocusBounds.isEmpty()) return keyHandled; 5218 if (mLastFocusBounds.equals(contentFocus)) return keyHandled; 5219 if (LOGV_ENABLED) { 5220 Log.v(LOGTAG, "navHandledKey contentFocus=" + contentFocus); 5221 } 5222 requestRectangleOnScreen(viewFocus); 5223 mUserScroll = true; 5224 return keyHandled; 5225 } 5226 5227 /** 5228 * Set the background color. It's white by default. Pass 5229 * zero to make the view transparent. 5230 * @param color the ARGB color described by Color.java 5231 */ 5232 public void setBackgroundColor(int color) { 5233 mBackgroundColor = color; 5234 mWebViewCore.sendMessage(EventHub.SET_BACKGROUND_COLOR, color); 5235 } 5236 5237 public void debugDump() { 5238 nativeDebugDump(); 5239 mWebViewCore.sendMessage(EventHub.DUMP_NAVTREE); 5240 } 5241 5242 /** 5243 * Update our cache with updatedText. 5244 * @param updatedText The new text to put in our cache. 5245 */ 5246 /* package */ void updateCachedTextfield(String updatedText) { 5247 // Also place our generation number so that when we look at the cache 5248 // we recognize that it is up to date. 5249 nativeUpdateCachedTextfield(updatedText, mTextGeneration); 5250 } 5251 5252 private native void nativeClearFocus(int x, int y); 5253 private native void nativeCreate(int ptr); 5254 private native int nativeCursorFramePointer(); 5255 private native Rect nativeCursorNodeBounds(); 5256 /* package */ native int nativeCursorNodePointer(); 5257 /* package */ native boolean nativeCursorMatchesFocus(); 5258 private native boolean nativeCursorIntersects(Rect visibleRect); 5259 private native boolean nativeCursorIsAnchor(); 5260 private native boolean nativeCursorIsTextInput(); 5261 private native String nativeCursorText(); 5262 private native void nativeDebugDump(); 5263 private native void nativeDestroy(); 5264 private native void nativeDrawCursorRing(Canvas content); 5265 private native void nativeDrawMatches(Canvas canvas); 5266 private native void nativeDrawSelection(Canvas content 5267 , int x, int y, boolean extendSelection); 5268 private native void nativeDrawSelectionRegion(Canvas content); 5269 private native void nativeDumpDisplayTree(String urlOrNull); 5270 private native int nativeFindAll(String findLower, String findUpper); 5271 private native void nativeFindNext(boolean forward); 5272 private native boolean nativeFocusIsPassword(); 5273 private native boolean nativeFocusIsRtlText(); 5274 private native boolean nativeFocusIsTextField(); 5275 private native boolean nativeFocusIsTextInput(); 5276 private native int nativeFocusMaxLength(); 5277 private native String nativeFocusName(); 5278 private native Rect nativeFocusNodeBounds(); 5279 /* package */ native int nativeFocusNodePointer(); 5280 private native String nativeFocusText(); 5281 private native int nativeFocusTextSize(); 5282 /** 5283 * Returns true if the native focus nodes says it wants to handle key events 5284 * (ala plugins). This can only be called if mNativeClass is non-zero! 5285 */ 5286 private native boolean nativeFocusNodeWantsKeyEvents(); 5287 private native Rect nativeGetCursorRingBounds(); 5288 private native Region nativeGetSelection(); 5289 private native boolean nativeHasCursorNode(); 5290 private native boolean nativeHasFocusNode(); 5291 private native String nativeImageURI(int x, int y); 5292 private native void nativeInstrumentReport(); 5293 private native void nativeMarkNodeInvalid(int node); 5294 // return true if the page has been scrolled 5295 private native boolean nativeMotionUp(int x, int y, int slop); 5296 // returns false if it handled the key 5297 private native boolean nativeMoveFocus(int keyCode, int count, 5298 boolean noScroll); 5299 private native int nativeMoveGeneration(); 5300 private native void nativeMoveSelection(int x, int y, 5301 boolean extendSelection); 5302 private native void nativeRecomputeFocus(); 5303 // Like many other of our native methods, you must make sure that 5304 // mNativeClass is not null before calling this method. 5305 private native void nativeRecordButtons(boolean focused, 5306 boolean pressed, boolean invalidate); 5307 private native void nativeSelectBestAt(Rect rect); 5308 private native void nativeSetFindIsDown(); 5309 private native void nativeSetFollowedLink(boolean followed); 5310 private native void nativeSetHeightCanMeasure(boolean measure); 5311 private native int nativeTextGeneration(); 5312 // Never call this version except by updateCachedTextfield(String) - 5313 // we always want to pass in our generation number. 5314 private native void nativeUpdateCachedTextfield(String updatedText, 5315 int generation); 5316 5317} 5318