WebTextView.java revision f9a6c91f75a4f08543b045435fd795f475e7e879
1/* 2 * Copyright (C) 2007 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.content.Context; 20import android.graphics.Color; 21import android.graphics.Paint; 22import android.graphics.Rect; 23import android.graphics.drawable.ColorDrawable; 24import android.os.Bundle; 25import android.os.Handler; 26import android.os.Message; 27import android.os.ResultReceiver; 28import android.text.BoringLayout.Metrics; 29import android.text.DynamicLayout; 30import android.text.Editable; 31import android.text.InputFilter; 32import android.text.InputType; 33import android.text.Layout; 34import android.text.Selection; 35import android.text.Spannable; 36import android.text.TextPaint; 37import android.text.TextUtils; 38import android.text.method.MovementMethod; 39import android.text.method.Touch; 40import android.util.Log; 41import android.util.TypedValue; 42import android.view.Gravity; 43import android.view.KeyCharacterMap; 44import android.view.KeyEvent; 45import android.view.MotionEvent; 46import android.view.View; 47import android.view.ViewConfiguration; 48import android.view.ViewGroup; 49import android.view.inputmethod.EditorInfo; 50import android.view.inputmethod.InputConnection; 51import android.view.inputmethod.InputMethodManager; 52import android.widget.AbsoluteLayout.LayoutParams; 53import android.widget.AdapterView; 54import android.widget.ArrayAdapter; 55import android.widget.AutoCompleteTextView; 56import android.widget.TextView; 57 58import junit.framework.Assert; 59 60import java.net.MalformedURLException; 61import java.net.URL; 62import java.util.ArrayList; 63 64/** 65 * WebTextView is a specialized version of EditText used by WebView 66 * to overlay html textfields (and textareas) to use our standard 67 * text editing. 68 */ 69/* package */ class WebTextView extends AutoCompleteTextView 70 implements AdapterView.OnItemClickListener { 71 72 static final String LOGTAG = "webtextview"; 73 74 private WebView mWebView; 75 private boolean mSingle; 76 private int mWidthSpec; 77 private int mHeightSpec; 78 private int mNodePointer; 79 // FIXME: This is a hack for blocking unmatched key ups, in particular 80 // on the enter key. The method for blocking unmatched key ups prevents 81 // the shift key from working properly. 82 private boolean mGotEnterDown; 83 private int mMaxLength; 84 // Keep track of the text before the change so we know whether we actually 85 // need to send down the DOM events. 86 private String mPreChange; 87 // Variables for keeping track of the touch down, to send to the WebView 88 // when a drag starts 89 private float mDragStartX; 90 private float mDragStartY; 91 private long mDragStartTime; 92 private boolean mDragSent; 93 // True if the most recent drag event has caused either the TextView to 94 // scroll or the web page to scroll. Gets reset after a touch down. 95 private boolean mScrolled; 96 // Whether or not a selection change was generated from webkit. If it was, 97 // we do not need to pass the selection back to webkit. 98 private boolean mFromWebKit; 99 // Whether or not a selection change was generated from the WebTextView 100 // gaining focus. If it is, we do not want to pass it to webkit. This 101 // selection comes from the MovementMethod, but we behave differently. If 102 // WebTextView gained focus from a touch, webkit will determine the 103 // selection. 104 private boolean mFromFocusChange; 105 // Whether or not a selection change was generated from setInputType. We 106 // do not want to pass this change to webkit. 107 private boolean mFromSetInputType; 108 private boolean mGotTouchDown; 109 // Keep track of whether a long press has happened. Only meaningful after 110 // an ACTION_DOWN MotionEvent 111 private boolean mHasPerformedLongClick; 112 private boolean mInSetTextAndKeepSelection; 113 // Array to store the final character added in onTextChanged, so that its 114 // KeyEvents may be determined. 115 private char[] mCharacter = new char[1]; 116 // This is used to reset the length filter when on a textfield 117 // with no max length. 118 // FIXME: This can be replaced with TextView.NO_FILTERS if that 119 // is made public/protected. 120 private static final InputFilter[] NO_FILTERS = new InputFilter[0]; 121 // For keeping track of the fact that the delete key was pressed, so 122 // we can simply pass a delete key instead of calling deleteSelection. 123 private boolean mGotDelete; 124 private int mDelSelStart; 125 private int mDelSelEnd; 126 127 // Keep in sync with native constant in 128 // external/webkit/WebKit/android/WebCoreSupport/autofill/WebAutoFill.cpp 129 /* package */ static final int FORM_NOT_AUTOFILLABLE = -1; 130 131 private boolean mAutoFillable; // Is this textview part of an autofillable form? 132 private int mQueryId; 133 private boolean mAutoFillProfileIsSet; 134 // Used to determine whether onFocusChanged was called as a result of 135 // calling remove(). 136 private boolean mInsideRemove; 137 private class MyResultReceiver extends ResultReceiver { 138 @Override 139 protected void onReceiveResult(int resultCode, Bundle resultData) { 140 if (resultCode == InputMethodManager.RESULT_SHOWN 141 && mWebView != null) { 142 mWebView.revealSelection(); 143 } 144 } 145 146 /** 147 * @param handler 148 */ 149 public MyResultReceiver(Handler handler) { 150 super(handler); 151 } 152 } 153 private MyResultReceiver mReceiver; 154 155 // Types used with setType. Keep in sync with CachedInput.h 156 private static final int NORMAL_TEXT_FIELD = 0; 157 private static final int TEXT_AREA = 1; 158 private static final int PASSWORD = 2; 159 private static final int SEARCH = 3; 160 private static final int EMAIL = 4; 161 private static final int NUMBER = 5; 162 private static final int TELEPHONE = 6; 163 private static final int URL = 7; 164 165 private static final int AUTOFILL_FORM = 100; 166 private Handler mHandler; 167 168 /** 169 * Create a new WebTextView. 170 * @param context The Context for this WebTextView. 171 * @param webView The WebView that created this. 172 */ 173 /* package */ WebTextView(Context context, WebView webView, int autoFillQueryId) { 174 super(context, null, com.android.internal.R.attr.webTextViewStyle); 175 mWebView = webView; 176 mMaxLength = -1; 177 setAutoFillable(autoFillQueryId); 178 // Turn on subpixel text, and turn off kerning, so it better matches 179 // the text in webkit. 180 TextPaint paint = getPaint(); 181 int flags = paint.getFlags() & ~Paint.DEV_KERN_TEXT_FLAG 182 | Paint.SUBPIXEL_TEXT_FLAG | Paint.DITHER_FLAG; 183 paint.setFlags(flags); 184 185 // Set the text color to black, regardless of the theme. This ensures 186 // that other applications that use embedded WebViews will properly 187 // display the text in password textfields. 188 setTextColor(DebugFlags.DRAW_WEBTEXTVIEW ? Color.RED : Color.BLACK); 189 setBackgroundDrawable(DebugFlags.DRAW_WEBTEXTVIEW ? null : new ColorDrawable(Color.WHITE)); 190 191 // This helps to align the text better with the text in the web page. 192 setIncludeFontPadding(false); 193 194 mHandler = new Handler() { 195 @Override 196 public void handleMessage(Message msg) { 197 switch (msg.what) { 198 case AUTOFILL_FORM: 199 mWebView.autoFillForm(mQueryId); 200 break; 201 } 202 } 203 }; 204 mReceiver = new MyResultReceiver(mHandler); 205 } 206 207 public void setAutoFillable(int queryId) { 208 mAutoFillable = mWebView.getSettings().getAutoFillEnabled() 209 && (queryId != FORM_NOT_AUTOFILLABLE); 210 mQueryId = queryId; 211 } 212 213 @Override 214 public boolean dispatchKeyEvent(KeyEvent event) { 215 if (event.isSystem()) { 216 return super.dispatchKeyEvent(event); 217 } 218 // Treat ACTION_DOWN and ACTION MULTIPLE the same 219 boolean down = event.getAction() != KeyEvent.ACTION_UP; 220 int keyCode = event.getKeyCode(); 221 222 boolean isArrowKey = false; 223 switch(keyCode) { 224 case KeyEvent.KEYCODE_DPAD_LEFT: 225 case KeyEvent.KEYCODE_DPAD_RIGHT: 226 case KeyEvent.KEYCODE_DPAD_UP: 227 case KeyEvent.KEYCODE_DPAD_DOWN: 228 isArrowKey = true; 229 break; 230 } 231 232 if (KeyEvent.KEYCODE_TAB == keyCode) { 233 if (down) { 234 onEditorAction(EditorInfo.IME_ACTION_NEXT); 235 } 236 return true; 237 } 238 Spannable text = (Spannable) getText(); 239 int oldStart = Selection.getSelectionStart(text); 240 int oldEnd = Selection.getSelectionEnd(text); 241 // Normally the delete key's dom events are sent via onTextChanged. 242 // However, if the cursor is at the beginning of the field, which 243 // includes the case where it has zero length, then the text is not 244 // changed, so send the events immediately. 245 if (KeyEvent.KEYCODE_DEL == keyCode) { 246 if (oldStart == 0 && oldEnd == 0) { 247 sendDomEvent(event); 248 return true; 249 } 250 if (down) { 251 mGotDelete = true; 252 mDelSelStart = oldStart; 253 mDelSelEnd = oldEnd; 254 } 255 } 256 257 if (mSingle && (KeyEvent.KEYCODE_ENTER == keyCode 258 || KeyEvent.KEYCODE_NUMPAD_ENTER == keyCode)) { 259 if (isPopupShowing()) { 260 return super.dispatchKeyEvent(event); 261 } 262 if (!down) { 263 // Hide the keyboard, since the user has just submitted this 264 // form. The submission happens thanks to the two calls 265 // to sendDomEvent. 266 InputMethodManager.getInstance(mContext) 267 .hideSoftInputFromWindow(getWindowToken(), 0); 268 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, keyCode)); 269 sendDomEvent(event); 270 } 271 return super.dispatchKeyEvent(event); 272 } else if (KeyEvent.KEYCODE_DPAD_CENTER == keyCode) { 273 // Note that this handles center key and trackball. 274 if (isPopupShowing()) { 275 return super.dispatchKeyEvent(event); 276 } 277 // Center key should be passed to a potential onClick 278 if (!down) { 279 mWebView.centerKeyPressOnTextField(); 280 } 281 // Pass to super to handle longpress. 282 return super.dispatchKeyEvent(event); 283 } 284 285 // Ensure there is a layout so arrow keys are handled properly. 286 if (getLayout() == null) { 287 measure(mWidthSpec, mHeightSpec); 288 } 289 290 int oldLength = text.length(); 291 boolean maxedOut = mMaxLength != -1 && oldLength == mMaxLength; 292 // If we are at max length, and there is a selection rather than a 293 // cursor, we need to store the text to compare later, since the key 294 // may have changed the string. 295 String oldText; 296 if (maxedOut && oldEnd != oldStart) { 297 oldText = text.toString(); 298 } else { 299 oldText = ""; 300 } 301 if (super.dispatchKeyEvent(event)) { 302 // If the WebTextView handled the key it was either an alphanumeric 303 // key, a delete, or a movement within the text. All of those are 304 // ok to pass to javascript. 305 306 // UNLESS there is a max length determined by the html. In that 307 // case, if the string was already at the max length, an 308 // alphanumeric key will be erased by the LengthFilter, 309 // so do not pass down to javascript, and instead 310 // return true. If it is an arrow key or a delete key, we can go 311 // ahead and pass it down. 312 if (KeyEvent.KEYCODE_ENTER == keyCode 313 || KeyEvent.KEYCODE_NUMPAD_ENTER == keyCode) { 314 // For multi-line text boxes, newlines will 315 // trigger onTextChanged for key down (which will send both 316 // key up and key down) but not key up. 317 mGotEnterDown = true; 318 } 319 if (maxedOut && !isArrowKey && keyCode != KeyEvent.KEYCODE_DEL) { 320 if (oldEnd == oldStart) { 321 // Return true so the key gets dropped. 322 return true; 323 } else if (!oldText.equals(getText().toString())) { 324 // FIXME: This makes the text work properly, but it 325 // does not pass down the key event, so it may not 326 // work for a textfield that has the type of 327 // behavior of GoogleSuggest. That said, it is 328 // unlikely that a site would combine the two in 329 // one textfield. 330 Spannable span = (Spannable) getText(); 331 int newStart = Selection.getSelectionStart(span); 332 int newEnd = Selection.getSelectionEnd(span); 333 mWebView.replaceTextfieldText(0, oldLength, span.toString(), 334 newStart, newEnd); 335 return true; 336 } 337 } 338 /* FIXME: 339 * In theory, we would like to send the events for the arrow keys. 340 * However, the TextView can arbitrarily change the selection (i.e. 341 * long press followed by using the trackball). Therefore, we keep 342 * in sync with the TextView via onSelectionChanged. If we also 343 * send the DOM event, we lose the correct selection. 344 if (isArrowKey) { 345 // Arrow key does not change the text, but we still want to send 346 // the DOM events. 347 sendDomEvent(event); 348 } 349 */ 350 return true; 351 } 352 // Ignore the key up event for newlines. This prevents 353 // multiple newlines in the native textarea. 354 if (mGotEnterDown && !down) { 355 return true; 356 } 357 // if it is a navigation key, pass it to WebView 358 if (isArrowKey) { 359 // WebView check the trackballtime in onKeyDown to avoid calling 360 // native from both trackball and key handling. As this is called 361 // from WebTextView, we always want WebView to check with native. 362 // Reset trackballtime to ensure it. 363 mWebView.resetTrackballTime(); 364 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 365 .onKeyUp(keyCode, event); 366 } 367 return false; 368 } 369 370 void ensureLayout() { 371 if (getLayout() == null) { 372 // Ensure we have a Layout 373 measure(mWidthSpec, mHeightSpec); 374 LayoutParams params = (LayoutParams) getLayoutParams(); 375 if (params != null) { 376 layout(params.x, params.y, params.x + params.width, 377 params.y + params.height); 378 } 379 } 380 } 381 382 /* package */ ResultReceiver getResultReceiver() { return mReceiver; } 383 384 /** 385 * Determine whether this WebTextView currently represents the node 386 * represented by ptr. 387 * @param ptr Pointer to a node to compare to. 388 * @return boolean Whether this WebTextView already represents the node 389 * pointed to by ptr. 390 */ 391 /* package */ boolean isSameTextField(int ptr) { 392 return ptr == mNodePointer; 393 } 394 395 /** 396 * Ensure that the underlying text field/area is lined up with the WebTextView. 397 */ 398 private void lineUpScroll() { 399 Layout layout = getLayout(); 400 if (mWebView != null && layout != null) { 401 if (mSingle) { 402 // textfields only need to be lined up horizontally. 403 float maxScrollX = layout.getLineRight(0) - getWidth(); 404 if (DebugFlags.WEB_TEXT_VIEW) { 405 Log.v(LOGTAG, "onTouchEvent x=" + mScrollX + " y=" 406 + mScrollY + " maxX=" + maxScrollX); 407 } 408 mWebView.scrollFocusedTextInputX(maxScrollX > 0 ? 409 mScrollX / maxScrollX : 0); 410 } else { 411 // textareas only need to be lined up vertically. 412 mWebView.scrollFocusedTextInputY(mScrollY); 413 } 414 } 415 } 416 417 @Override 418 protected void makeNewLayout(int w, int hintWidth, Metrics boring, 419 Metrics hintBoring, int ellipsisWidth, boolean bringIntoView) { 420 // Necessary to get a Layout to work with, and to do the other work that 421 // makeNewLayout does. 422 super.makeNewLayout(w, hintWidth, boring, hintBoring, ellipsisWidth, 423 bringIntoView); 424 lineUpScroll(); 425 } 426 427 /** 428 * Custom layout which figures out its line spacing. If -1 is passed in for 429 * the height, it will use the ascent and descent from the paint to 430 * determine the line spacing. Otherwise it will use the spacing provided. 431 */ 432 private static class WebTextViewLayout extends DynamicLayout { 433 private float mLineHeight; 434 private float mDifference; 435 public WebTextViewLayout(CharSequence base, CharSequence display, 436 TextPaint paint, 437 int width, Alignment align, 438 float spacingMult, float spacingAdd, 439 boolean includepad, 440 TextUtils.TruncateAt ellipsize, int ellipsizedWidth, 441 float lineHeight) { 442 super(base, display, paint, width, align, spacingMult, spacingAdd, 443 includepad, ellipsize, ellipsizedWidth); 444 float paintLineHeight = paint.descent() - paint.ascent(); 445 if (lineHeight == -1f) { 446 mLineHeight = paintLineHeight; 447 mDifference = 0f; 448 } else { 449 mLineHeight = lineHeight; 450 // Through trial and error, I found this calculation to improve 451 // the accuracy of line placement. 452 mDifference = (lineHeight - paintLineHeight) / 2; 453 } 454 } 455 456 @Override 457 public int getLineTop(int line) { 458 return Math.round(mLineHeight * line - mDifference); 459 } 460 } 461 462 @Override public InputConnection onCreateInputConnection( 463 EditorInfo outAttrs) { 464 InputConnection connection = super.onCreateInputConnection(outAttrs); 465 if (mWebView != null) { 466 // Use the name of the textfield + the url. Use backslash as an 467 // arbitrary separator. 468 outAttrs.fieldName = mWebView.nativeFocusCandidateName() + "\\" 469 + mWebView.getUrl(); 470 } 471 return connection; 472 } 473 474 @Override 475 public void onEditorAction(int actionCode) { 476 switch (actionCode) { 477 case EditorInfo.IME_ACTION_NEXT: 478 if (mWebView.nativeMoveCursorToNextTextInput()) { 479 // Preemptively rebuild the WebTextView, so that the action will 480 // be set properly. 481 mWebView.rebuildWebTextView(); 482 setDefaultSelection(); 483 mWebView.invalidate(); 484 } 485 break; 486 case EditorInfo.IME_ACTION_DONE: 487 super.onEditorAction(actionCode); 488 break; 489 case EditorInfo.IME_ACTION_GO: 490 case EditorInfo.IME_ACTION_SEARCH: 491 // Send an enter and hide the soft keyboard 492 InputMethodManager.getInstance(mContext) 493 .hideSoftInputFromWindow(getWindowToken(), 0); 494 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 495 KeyEvent.KEYCODE_ENTER)); 496 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 497 KeyEvent.KEYCODE_ENTER)); 498 499 default: 500 break; 501 } 502 } 503 504 @Override 505 protected void onFocusChanged(boolean focused, int direction, 506 Rect previouslyFocusedRect) { 507 mFromFocusChange = true; 508 super.onFocusChanged(focused, direction, previouslyFocusedRect); 509 if (focused) { 510 mWebView.setActive(true); 511 } else if (!mInsideRemove) { 512 mWebView.setActive(false); 513 } 514 mFromFocusChange = false; 515 } 516 517 // AdapterView.OnItemClickListener implementation 518 519 @Override 520 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 521 if (id == 0 && position == 0) { 522 // Blank out the text box while we wait for WebCore to fill the form. 523 replaceText(""); 524 WebSettings settings = mWebView.getSettings(); 525 if (mAutoFillProfileIsSet) { 526 // Call a webview method to tell WebCore to autofill the form. 527 mWebView.autoFillForm(mQueryId); 528 } else { 529 // There is no autofill profile setup yet and the user has 530 // elected to try and set one up. Call through to the 531 // embedder to action that. 532 mWebView.getWebChromeClient().setupAutoFill( 533 mHandler.obtainMessage(AUTOFILL_FORM)); 534 } 535 } 536 } 537 538 @Override 539 protected void onScrollChanged(int l, int t, int oldl, int oldt) { 540 super.onScrollChanged(l, t, oldl, oldt); 541 lineUpScroll(); 542 } 543 544 @Override 545 protected void onSelectionChanged(int selStart, int selEnd) { 546 if (!mFromWebKit && !mFromFocusChange && !mFromSetInputType 547 && mWebView != null && !mInSetTextAndKeepSelection) { 548 if (DebugFlags.WEB_TEXT_VIEW) { 549 Log.v(LOGTAG, "onSelectionChanged selStart=" + selStart 550 + " selEnd=" + selEnd); 551 } 552 mWebView.setSelection(selStart, selEnd); 553 lineUpScroll(); 554 } 555 } 556 557 @Override 558 protected void onTextChanged(CharSequence s,int start,int before,int count){ 559 super.onTextChanged(s, start, before, count); 560 String postChange = s.toString(); 561 // Prevent calls to setText from invoking onTextChanged (since this will 562 // mean we are on a different textfield). Also prevent the change when 563 // going from a textfield with a string of text to one with a smaller 564 // limit on text length from registering the onTextChanged event. 565 if (mPreChange == null || mPreChange.equals(postChange) || 566 (mMaxLength > -1 && mPreChange.length() > mMaxLength && 567 mPreChange.substring(0, mMaxLength).equals(postChange))) { 568 return; 569 } 570 if (0 == count) { 571 if (before > 0) { 572 // For this and all changes to the text, update our cache 573 updateCachedTextfield(); 574 if (mGotDelete) { 575 mGotDelete = false; 576 int oldEnd = start + before; 577 if (mDelSelEnd == oldEnd 578 && (mDelSelStart == start 579 || (mDelSelStart == oldEnd && before == 1))) { 580 // If the selection is set up properly before the 581 // delete, send the DOM events. 582 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 583 KeyEvent.KEYCODE_DEL)); 584 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 585 KeyEvent.KEYCODE_DEL)); 586 return; 587 } 588 } 589 // This was simply a delete or a cut, so just delete the 590 // selection. 591 mWebView.deleteSelection(start, start + before); 592 } 593 mGotDelete = false; 594 // before should never be negative, so whether it was a cut 595 // (handled above), or before is 0, in which case nothing has 596 // changed, we should return. 597 return; 598 } 599 // Ensure that this flag gets cleared, since with autocorrect on, a 600 // delete key press may have a more complex result than deleting one 601 // character or the existing selection, so it will not get cleared 602 // above. 603 mGotDelete = false; 604 // Prefer sending javascript events, so when adding one character, 605 // don't replace the unchanged text. 606 if (count > 1 && before == count - 1) { 607 String replaceButOne = mPreChange.subSequence(start, 608 start + before).toString(); 609 String replacedString = s.subSequence(start, 610 start + before).toString(); 611 if (replaceButOne.equals(replacedString)) { 612 // we're just adding one character 613 start += before; 614 before = 0; 615 count = 1; 616 } 617 } 618 mPreChange = postChange; 619 // Find the last character being replaced. If it can be represented by 620 // events, we will pass them to native so we can see javascript events. 621 // Otherwise, replace the text being changed in the textfield. 622 KeyEvent[] events = null; 623 if (count == 1) { 624 TextUtils.getChars(s, start + count - 1, start + count, mCharacter, 0); 625 KeyCharacterMap kmap = KeyCharacterMap.load(KeyCharacterMap.VIRTUAL_KEYBOARD); 626 events = kmap.getEvents(mCharacter); 627 } 628 boolean useKeyEvents = (events != null); 629 if (useKeyEvents) { 630 // This corrects the selection which may have been affected by the 631 // trackball or auto-correct. 632 if (DebugFlags.WEB_TEXT_VIEW) { 633 Log.v(LOGTAG, "onTextChanged start=" + start 634 + " start + before=" + (start + before)); 635 } 636 if (!mInSetTextAndKeepSelection) { 637 mWebView.setSelection(start, start + before); 638 } 639 int length = events.length; 640 for (int i = 0; i < length; i++) { 641 // We never send modifier keys to native code so don't send them 642 // here either. 643 if (!KeyEvent.isModifierKey(events[i].getKeyCode())) { 644 sendDomEvent(events[i]); 645 } 646 } 647 } else { 648 String replace = s.subSequence(start, 649 start + count).toString(); 650 mWebView.replaceTextfieldText(start, start + before, replace, 651 start + count, 652 start + count); 653 } 654 updateCachedTextfield(); 655 } 656 657 @Override 658 public boolean onTouchEvent(MotionEvent event) { 659 switch (event.getAction()) { 660 case MotionEvent.ACTION_DOWN: 661 super.onTouchEvent(event); 662 // This event may be the start of a drag, so store it to pass to the 663 // WebView if it is. 664 mDragStartX = event.getX(); 665 mDragStartY = event.getY(); 666 mDragStartTime = event.getEventTime(); 667 mDragSent = false; 668 mScrolled = false; 669 mGotTouchDown = true; 670 mHasPerformedLongClick = false; 671 break; 672 case MotionEvent.ACTION_MOVE: 673 if (mHasPerformedLongClick) { 674 mGotTouchDown = false; 675 return false; 676 } 677 int slop = ViewConfiguration.get(mContext).getScaledTouchSlop(); 678 Spannable buffer = getText(); 679 int initialScrollX = Touch.getInitialScrollX(this, buffer); 680 int initialScrollY = Touch.getInitialScrollY(this, buffer); 681 super.onTouchEvent(event); 682 int dx = Math.abs(mScrollX - initialScrollX); 683 int dy = Math.abs(mScrollY - initialScrollY); 684 // Use a smaller slop when checking to see if we've moved far enough 685 // to scroll the text, because experimentally, slop has shown to be 686 // to big for the case of a small textfield. 687 int smallerSlop = slop/2; 688 if (dx > smallerSlop || dy > smallerSlop) { 689 // Scrolling is handled in onScrollChanged. 690 mScrolled = true; 691 cancelLongPress(); 692 return true; 693 } 694 if (Math.abs((int) event.getX() - mDragStartX) < slop 695 && Math.abs((int) event.getY() - mDragStartY) < slop) { 696 // If the user has not scrolled further than slop, we should not 697 // send the drag. Instead, do nothing, and when the user lifts 698 // their finger, we will change the selection. 699 return true; 700 } 701 if (mWebView != null) { 702 // Only want to set the initial state once. 703 if (!mDragSent) { 704 mWebView.initiateTextFieldDrag(mDragStartX, mDragStartY, 705 mDragStartTime); 706 mDragSent = true; 707 } 708 boolean scrolled = mWebView.textFieldDrag(event); 709 if (scrolled) { 710 mScrolled = true; 711 cancelLongPress(); 712 return true; 713 } 714 } 715 return false; 716 case MotionEvent.ACTION_UP: 717 case MotionEvent.ACTION_CANCEL: 718 super.onTouchEvent(event); 719 if (mHasPerformedLongClick) { 720 mGotTouchDown = false; 721 return false; 722 } 723 if (!mScrolled) { 724 // If the page scrolled, or the TextView scrolled, we do not 725 // want to change the selection 726 cancelLongPress(); 727 if (mGotTouchDown && mWebView != null) { 728 mWebView.touchUpOnTextField(event); 729 } 730 } 731 // Necessary for the WebView to reset its state 732 if (mWebView != null && mDragSent) { 733 mWebView.onTouchEvent(event); 734 } 735 mGotTouchDown = false; 736 break; 737 default: 738 break; 739 } 740 return true; 741 } 742 743 @Override 744 public boolean onTrackballEvent(MotionEvent event) { 745 if (isPopupShowing()) { 746 return super.onTrackballEvent(event); 747 } 748 if (event.getAction() != MotionEvent.ACTION_MOVE) { 749 return false; 750 } 751 Spannable text = getText(); 752 MovementMethod move = getMovementMethod(); 753 if (move != null && getLayout() != null && 754 move.onTrackballEvent(this, text, event)) { 755 // Selection is changed in onSelectionChanged 756 return true; 757 } 758 return false; 759 } 760 761 @Override 762 public boolean performLongClick() { 763 mHasPerformedLongClick = true; 764 return super.performLongClick(); 765 } 766 767 /** 768 * Remove this WebTextView from its host WebView, and return 769 * focus to the host. 770 */ 771 /* package */ void remove() { 772 // hide the soft keyboard when the edit text is out of focus 773 InputMethodManager imm = InputMethodManager.getInstance(mContext); 774 if (imm.isActive(this)) { 775 imm.hideSoftInputFromWindow(getWindowToken(), 0); 776 } 777 mInsideRemove = true; 778 boolean isFocused = hasFocus(); 779 mWebView.removeView(this); 780 if (isFocused) { 781 mWebView.requestFocus(); 782 } 783 mInsideRemove = false; 784 mHandler.removeCallbacksAndMessages(null); 785 } 786 787 @Override 788 public boolean requestRectangleOnScreen(Rect rectangle, boolean immediate) { 789 // Do nothing, since webkit will put the textfield on screen. 790 return true; 791 } 792 793 /** 794 * Send the DOM events for the specified event. 795 * @param event KeyEvent to be translated into a DOM event. 796 */ 797 private void sendDomEvent(KeyEvent event) { 798 mWebView.passToJavaScript(getText().toString(), event); 799 } 800 801 /** 802 * Always use this instead of setAdapter, as this has features specific to 803 * the WebTextView. 804 */ 805 public void setAdapterCustom(AutoCompleteAdapter adapter) { 806 if (adapter != null) { 807 setInputType(getInputType() 808 | InputType.TYPE_TEXT_FLAG_AUTO_COMPLETE); 809 adapter.setTextView(this); 810 if (mAutoFillable) { 811 setOnItemClickListener(this); 812 } else { 813 setOnItemClickListener(null); 814 } 815 showDropDown(); 816 } else { 817 dismissDropDown(); 818 } 819 super.setAdapter(adapter); 820 } 821 822 /** 823 * This is a special version of ArrayAdapter which changes its text size 824 * to match the text size of its host TextView. 825 */ 826 public static class AutoCompleteAdapter extends ArrayAdapter<String> { 827 private TextView mTextView; 828 829 public AutoCompleteAdapter(Context context, ArrayList<String> entries) { 830 super(context, com.android.internal.R.layout 831 .web_text_view_dropdown, entries); 832 } 833 834 /** 835 * {@inheritDoc} 836 */ 837 @Override 838 public View getView(int position, View convertView, ViewGroup parent) { 839 TextView tv = 840 (TextView) super.getView(position, convertView, parent); 841 if (tv != null && mTextView != null) { 842 tv.setTextSize(TypedValue.COMPLEX_UNIT_PX, mTextView.getTextSize()); 843 } 844 return tv; 845 } 846 847 /** 848 * Set the TextView so we can match its text size. 849 */ 850 private void setTextView(TextView tv) { 851 mTextView = tv; 852 } 853 } 854 855 /** 856 * Sets the selection when the user clicks on a textfield or textarea with 857 * the trackball or center key, or starts typing into it without clicking on 858 * it. 859 */ 860 /* package */ void setDefaultSelection() { 861 Spannable text = (Spannable) getText(); 862 int selection = mSingle ? text.length() : 0; 863 if (Selection.getSelectionStart(text) == selection 864 && Selection.getSelectionEnd(text) == selection) { 865 // The selection of the UI copy is set correctly, but the 866 // WebTextView still needs to inform the webkit thread to set the 867 // selection. Normally that is done in onSelectionChanged, but 868 // onSelectionChanged will not be called because the UI copy is not 869 // changing. (This can happen when the WebTextView takes focus. 870 // That onSelectionChanged was blocked because the selection set 871 // when focusing is not necessarily the desirable selection for 872 // WebTextView.) 873 if (mWebView != null) { 874 mWebView.setSelection(selection, selection); 875 } 876 } else { 877 Selection.setSelection(text, selection, selection); 878 } 879 if (mWebView != null) mWebView.incrementTextGeneration(); 880 } 881 882 @Override 883 public void setInputType(int type) { 884 mFromSetInputType = true; 885 super.setInputType(type); 886 mFromSetInputType = false; 887 } 888 889 private void setMaxLength(int maxLength) { 890 mMaxLength = maxLength; 891 if (-1 == maxLength) { 892 setFilters(NO_FILTERS); 893 } else { 894 setFilters(new InputFilter[] { 895 new InputFilter.LengthFilter(maxLength) }); 896 } 897 } 898 899 /** 900 * Set the pointer for this node so it can be determined which node this 901 * WebTextView represents. 902 * @param ptr Integer representing the pointer to the node which this 903 * WebTextView represents. 904 */ 905 /* package */ void setNodePointer(int ptr) { 906 if (ptr != mNodePointer) { 907 mNodePointer = ptr; 908 setAdapterCustom(null); 909 } 910 } 911 912 /** 913 * Determine the position and size of WebTextView, and add it to the 914 * WebView's view heirarchy. All parameters are presumed to be in 915 * view coordinates. Also requests Focus and sets the cursor to not 916 * request to be in view. 917 * @param x x-position of the textfield. 918 * @param y y-position of the textfield. 919 * @param width width of the textfield. 920 * @param height height of the textfield. 921 */ 922 /* package */ void setRect(int x, int y, int width, int height) { 923 LayoutParams lp = (LayoutParams) getLayoutParams(); 924 boolean needsUpdate = false; 925 if (null == lp) { 926 lp = new LayoutParams(width, height, x, y); 927 } else { 928 if ((lp.x != x) || (lp.y != y) || (lp.width != width) 929 || (lp.height != height)) { 930 needsUpdate = true; 931 lp.x = x; 932 lp.y = y; 933 lp.width = width; 934 lp.height = height; 935 } 936 } 937 if (getParent() == null) { 938 // Insert the view so that it's drawn first (at index 0) 939 mWebView.addView(this, 0, lp); 940 } else if (needsUpdate) { 941 setLayoutParams(lp); 942 } 943 // Set up a measure spec so a layout can always be recreated. 944 mWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY); 945 mHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY); 946 } 947 948 /** 949 * Set the selection, and disable our onSelectionChanged action. 950 */ 951 /* package */ void setSelectionFromWebKit(int start, int end) { 952 if (start < 0 || end < 0) return; 953 Spannable text = (Spannable) getText(); 954 int length = text.length(); 955 if (start > length || end > length) return; 956 mFromWebKit = true; 957 Selection.setSelection(text, start, end); 958 mFromWebKit = false; 959 } 960 961 /** 962 * Update the text size according to the size of the focus candidate's text 963 * size in mWebView. Should only be called from mWebView. 964 */ 965 /* package */ void updateTextSize() { 966 Assert.assertNotNull("updateTextSize should only be called from " 967 + "mWebView, so mWebView should never be null!", mWebView); 968 // Note that this is approximately WebView.contentToViewDimension, 969 // without being rounded. 970 float size = mWebView.nativeFocusCandidateTextSize() 971 * mWebView.getScale(); 972 setTextSize(TypedValue.COMPLEX_UNIT_PX, size); 973 } 974 975 /** 976 * Set the text to the new string, but use the old selection, making sure 977 * to keep it within the new string. 978 * @param text The new text to place in the textfield. 979 */ 980 /* package */ void setTextAndKeepSelection(String text) { 981 Editable edit = getText(); 982 mPreChange = text; 983 if (edit.toString().equals(text)) { 984 return; 985 } 986 int selStart = Selection.getSelectionStart(edit); 987 int selEnd = Selection.getSelectionEnd(edit); 988 mInSetTextAndKeepSelection = true; 989 edit.replace(0, edit.length(), text); 990 int newLength = edit.length(); 991 if (selStart > newLength) selStart = newLength; 992 if (selEnd > newLength) selEnd = newLength; 993 Selection.setSelection(edit, selStart, selEnd); 994 mInSetTextAndKeepSelection = false; 995 InputMethodManager imm = InputMethodManager.peekInstance(); 996 if (imm != null && imm.isActive(this)) { 997 // Since the text has changed, do not allow the IME to replace the 998 // existing text as though it were a completion. 999 imm.restartInput(this); 1000 } 1001 updateCachedTextfield(); 1002 } 1003 1004 /** 1005 * Called by WebView.rebuildWebTextView(). Based on the type of the <input> 1006 * element, set up the WebTextView, its InputType, and IME Options properly. 1007 * @param type int corresponding to enum "Type" defined in CachedInput.h. 1008 * Does not correspond to HTMLInputElement::InputType so this 1009 * is unaffected if that changes, and also because that has no 1010 * type corresponding to textarea (which is its own tag). 1011 */ 1012 /* package */ void setType(int type) { 1013 if (mWebView == null) return; 1014 boolean single = true; 1015 int maxLength = -1; 1016 int inputType = InputType.TYPE_CLASS_TEXT 1017 | InputType.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT; 1018 int imeOptions = EditorInfo.IME_FLAG_NO_EXTRACT_UI 1019 | EditorInfo.IME_FLAG_NO_FULLSCREEN; 1020 if (!mWebView.nativeFocusCandidateIsSpellcheck()) { 1021 inputType |= InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS; 1022 } 1023 if (TEXT_AREA != type 1024 && mWebView.nativeFocusCandidateHasNextTextfield()) { 1025 imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT; 1026 } 1027 switch (type) { 1028 case NORMAL_TEXT_FIELD: 1029 imeOptions |= EditorInfo.IME_ACTION_GO; 1030 break; 1031 case TEXT_AREA: 1032 single = false; 1033 inputType |= InputType.TYPE_TEXT_FLAG_MULTI_LINE 1034 | InputType.TYPE_TEXT_FLAG_CAP_SENTENCES 1035 | InputType.TYPE_TEXT_FLAG_AUTO_CORRECT; 1036 imeOptions |= EditorInfo.IME_ACTION_NONE; 1037 break; 1038 case PASSWORD: 1039 inputType |= EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 1040 imeOptions |= EditorInfo.IME_ACTION_GO; 1041 break; 1042 case SEARCH: 1043 imeOptions |= EditorInfo.IME_ACTION_SEARCH; 1044 break; 1045 case EMAIL: 1046 // inputType needs to be overwritten because of the different text variation. 1047 inputType = InputType.TYPE_CLASS_TEXT 1048 | InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS; 1049 imeOptions |= EditorInfo.IME_ACTION_GO; 1050 break; 1051 case NUMBER: 1052 // inputType needs to be overwritten because of the different class. 1053 inputType = InputType.TYPE_CLASS_NUMBER | InputType.TYPE_NUMBER_VARIATION_NORMAL 1054 | InputType.TYPE_NUMBER_FLAG_SIGNED | InputType.TYPE_NUMBER_FLAG_DECIMAL; 1055 // Number and telephone do not have both a Tab key and an 1056 // action, so set the action to NEXT 1057 imeOptions |= EditorInfo.IME_ACTION_NEXT; 1058 break; 1059 case TELEPHONE: 1060 // inputType needs to be overwritten because of the different class. 1061 inputType = InputType.TYPE_CLASS_PHONE; 1062 imeOptions |= EditorInfo.IME_ACTION_NEXT; 1063 break; 1064 case URL: 1065 // TYPE_TEXT_VARIATION_URI prevents Tab key from showing, so 1066 // exclude it for now. 1067 imeOptions |= EditorInfo.IME_ACTION_GO; 1068 break; 1069 default: 1070 imeOptions |= EditorInfo.IME_ACTION_GO; 1071 break; 1072 } 1073 setHint(null); 1074 setThreshold(1); 1075 boolean autoComplete = false; 1076 if (single) { 1077 mWebView.requestLabel(mWebView.nativeFocusCandidateFramePointer(), 1078 mNodePointer); 1079 maxLength = mWebView.nativeFocusCandidateMaxLength(); 1080 autoComplete = mWebView.nativeFocusCandidateIsAutoComplete(); 1081 if (type != PASSWORD && (mAutoFillable || autoComplete)) { 1082 String name = mWebView.nativeFocusCandidateName(); 1083 if (name != null && name.length() > 0) { 1084 mWebView.requestFormData(name, mNodePointer, mAutoFillable, 1085 autoComplete); 1086 } 1087 } 1088 } 1089 mSingle = single; 1090 setMaxLength(maxLength); 1091 setHorizontallyScrolling(single); 1092 setInputType(inputType); 1093 clearComposingText(); 1094 setImeOptions(imeOptions); 1095 setVisibility(VISIBLE); 1096 if (!autoComplete) { 1097 setAdapterCustom(null); 1098 } 1099 } 1100 1101 /** 1102 * Update the cache to reflect the current text. 1103 */ 1104 /* package */ void updateCachedTextfield() { 1105 mWebView.updateCachedTextfield(getText().toString()); 1106 } 1107 1108 /* package */ void setAutoFillProfileIsSet(boolean autoFillProfileIsSet) { 1109 mAutoFillProfileIsSet = autoFillProfileIsSet; 1110 } 1111 1112 static String urlForAutoCompleteData(String urlString) { 1113 // Remove any fragment or query string. 1114 URL url = null; 1115 try { 1116 url = new URL(urlString); 1117 } catch (MalformedURLException e) { 1118 Log.e(LOGTAG, "Unable to parse URL "+url); 1119 } 1120 1121 return url != null ? url.getProtocol() + "://" + url.getHost() + url.getPath() : null; 1122 } 1123 1124 public void setGravityForRtl(boolean rtl) { 1125 int gravity = rtl ? Gravity.RIGHT : Gravity.LEFT; 1126 gravity |= mSingle ? Gravity.CENTER_VERTICAL : Gravity.TOP; 1127 setGravity(gravity); 1128 } 1129 1130} 1131