WebTextView.java revision e3e7a88b4d83d46be5a6c766dc4340cd1687d693
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 com.android.internal.widget.EditableInputConnection; 20 21import android.content.Context; 22import android.graphics.Canvas; 23import android.graphics.Color; 24import android.graphics.ColorFilter; 25import android.graphics.Paint; 26import android.graphics.PixelFormat; 27import android.graphics.Rect; 28import android.graphics.drawable.ColorDrawable; 29import android.os.Bundle; 30import android.os.Handler; 31import android.os.Message; 32import android.os.ResultReceiver; 33import android.text.BoringLayout.Metrics; 34import android.text.DynamicLayout; 35import android.text.Editable; 36import android.text.InputFilter; 37import android.text.InputType; 38import android.text.Layout; 39import android.text.Selection; 40import android.text.Spannable; 41import android.text.TextPaint; 42import android.text.TextUtils; 43import android.text.method.MovementMethod; 44import android.text.method.Touch; 45import android.util.Log; 46import android.util.TypedValue; 47import android.view.Gravity; 48import android.view.KeyCharacterMap; 49import android.view.KeyEvent; 50import android.view.MotionEvent; 51import android.view.View; 52import android.view.ViewConfiguration; 53import android.view.ViewGroup; 54import android.view.inputmethod.EditorInfo; 55import android.view.inputmethod.InputConnection; 56import android.view.inputmethod.InputMethodManager; 57import android.widget.AbsoluteLayout.LayoutParams; 58import android.widget.AdapterView; 59import android.widget.ArrayAdapter; 60import android.widget.AutoCompleteTextView; 61import android.widget.TextView; 62 63import java.util.ArrayList; 64 65import junit.framework.Assert; 66 67/** 68 * WebTextView is a specialized version of EditText used by WebView 69 * to overlay html textfields (and textareas) to use our standard 70 * text editing. 71 */ 72/* package */ class WebTextView extends AutoCompleteTextView 73 implements AdapterView.OnItemClickListener { 74 75 static final String LOGTAG = "webtextview"; 76 77 private WebView mWebView; 78 private boolean mSingle; 79 private int mWidthSpec; 80 private int mHeightSpec; 81 private int mNodePointer; 82 // FIXME: This is a hack for blocking unmatched key ups, in particular 83 // on the enter key. The method for blocking unmatched key ups prevents 84 // the shift key from working properly. 85 private boolean mGotEnterDown; 86 private int mMaxLength; 87 // Keep track of the text before the change so we know whether we actually 88 // need to send down the DOM events. 89 private String mPreChange; 90 // Variables for keeping track of the touch down, to send to the WebView 91 // when a drag starts 92 private float mDragStartX; 93 private float mDragStartY; 94 private long mDragStartTime; 95 private boolean mDragSent; 96 // True if the most recent drag event has caused either the TextView to 97 // scroll or the web page to scroll. Gets reset after a touch down. 98 private boolean mScrolled; 99 // Whether or not a selection change was generated from webkit. If it was, 100 // we do not need to pass the selection back to webkit. 101 private boolean mFromWebKit; 102 // Whether or not a selection change was generated from the WebTextView 103 // gaining focus. If it is, we do not want to pass it to webkit. This 104 // selection comes from the MovementMethod, but we behave differently. If 105 // WebTextView gained focus from a touch, webkit will determine the 106 // selection. 107 private boolean mFromFocusChange; 108 // Whether or not a selection change was generated from setInputType. We 109 // do not want to pass this change to webkit. 110 private boolean mFromSetInputType; 111 private boolean mGotTouchDown; 112 // Keep track of whether a long press has happened. Only meaningful after 113 // an ACTION_DOWN MotionEvent 114 private boolean mHasPerformedLongClick; 115 private boolean mInSetTextAndKeepSelection; 116 // Array to store the final character added in onTextChanged, so that its 117 // KeyEvents may be determined. 118 private char[] mCharacter = new char[1]; 119 // This is used to reset the length filter when on a textfield 120 // with no max length. 121 // FIXME: This can be replaced with TextView.NO_FILTERS if that 122 // is made public/protected. 123 private static final InputFilter[] NO_FILTERS = new InputFilter[0]; 124 // For keeping track of the fact that the delete key was pressed, so 125 // we can simply pass a delete key instead of calling deleteSelection. 126 private boolean mGotDelete; 127 private int mDelSelStart; 128 private int mDelSelEnd; 129 130 // Keep in sync with native constant in 131 // external/webkit/WebKit/android/WebCoreSupport/autofill/WebAutoFill.cpp 132 /* package */ static final int FORM_NOT_AUTOFILLABLE = -1; 133 134 private boolean mAutoFillable; // Is this textview part of an autofillable form? 135 private int mQueryId; 136 private boolean mAutoFillProfileIsSet; 137 // Used to determine whether onFocusChanged was called as a result of 138 // calling remove(). 139 private boolean mInsideRemove; 140 private class MyResultReceiver extends ResultReceiver { 141 @Override 142 protected void onReceiveResult(int resultCode, Bundle resultData) { 143 if (resultCode == InputMethodManager.RESULT_SHOWN 144 && mWebView != null) { 145 mWebView.revealSelection(); 146 } 147 } 148 149 /** 150 * @param handler 151 */ 152 public MyResultReceiver(Handler handler) { 153 super(handler); 154 } 155 } 156 private MyResultReceiver mReceiver; 157 158 // Types used with setType. Keep in sync with CachedInput.h 159 private static final int NORMAL_TEXT_FIELD = 0; 160 private static final int TEXT_AREA = 1; 161 private static final int PASSWORD = 2; 162 private static final int SEARCH = 3; 163 private static final int EMAIL = 4; 164 private static final int NUMBER = 5; 165 private static final int TELEPHONE = 6; 166 private static final int URL = 7; 167 168 private static final int AUTOFILL_FORM = 100; 169 private Handler mHandler; 170 171 /** 172 * Create a new WebTextView. 173 * @param context The Context for this WebTextView. 174 * @param webView The WebView that created this. 175 */ 176 /* package */ WebTextView(Context context, WebView webView, int autoFillQueryId) { 177 super(context, null, com.android.internal.R.attr.webTextViewStyle); 178 mWebView = webView; 179 mMaxLength = -1; 180 setAutoFillable(autoFillQueryId); 181 // Turn on subpixel text, and turn off kerning, so it better matches 182 // the text in webkit. 183 TextPaint paint = getPaint(); 184 int flags = paint.getFlags() & ~Paint.DEV_KERN_TEXT_FLAG 185 | Paint.SUBPIXEL_TEXT_FLAG | Paint.DITHER_FLAG; 186 paint.setFlags(flags); 187 188 // Set the text color to black, regardless of the theme. This ensures 189 // that other applications that use embedded WebViews will properly 190 // display the text in password textfields. 191 setTextColor(DebugFlags.DRAW_WEBTEXTVIEW ? Color.RED : Color.BLACK); 192 setBackgroundDrawable(DebugFlags.DRAW_WEBTEXTVIEW ? null : new ColorDrawable(Color.WHITE)); 193 194 // This helps to align the text better with the text in the web page. 195 setIncludeFontPadding(false); 196 197 mHandler = new Handler() { 198 @Override 199 public void handleMessage(Message msg) { 200 switch (msg.what) { 201 case AUTOFILL_FORM: 202 mWebView.autoFillForm(mQueryId); 203 break; 204 } 205 } 206 }; 207 mReceiver = new MyResultReceiver(mHandler); 208 } 209 210 public void setAutoFillable(int queryId) { 211 mAutoFillable = mWebView.getSettings().getAutoFillEnabled() 212 && (queryId != FORM_NOT_AUTOFILLABLE); 213 mQueryId = queryId; 214 } 215 216 @Override 217 public boolean dispatchKeyEvent(KeyEvent event) { 218 if (event.isSystem()) { 219 return super.dispatchKeyEvent(event); 220 } 221 // Treat ACTION_DOWN and ACTION MULTIPLE the same 222 boolean down = event.getAction() != KeyEvent.ACTION_UP; 223 int keyCode = event.getKeyCode(); 224 225 boolean isArrowKey = false; 226 switch(keyCode) { 227 case KeyEvent.KEYCODE_DPAD_LEFT: 228 case KeyEvent.KEYCODE_DPAD_RIGHT: 229 case KeyEvent.KEYCODE_DPAD_UP: 230 case KeyEvent.KEYCODE_DPAD_DOWN: 231 isArrowKey = true; 232 break; 233 } 234 235 if (KeyEvent.KEYCODE_TAB == keyCode) { 236 if (down) { 237 onEditorAction(EditorInfo.IME_ACTION_NEXT); 238 } 239 return true; 240 } 241 Spannable text = (Spannable) getText(); 242 int oldStart = Selection.getSelectionStart(text); 243 int oldEnd = Selection.getSelectionEnd(text); 244 // Normally the delete key's dom events are sent via onTextChanged. 245 // However, if the cursor is at the beginning of the field, which 246 // includes the case where it has zero length, then the text is not 247 // changed, so send the events immediately. 248 if (KeyEvent.KEYCODE_DEL == keyCode) { 249 if (oldStart == 0 && oldEnd == 0) { 250 sendDomEvent(event); 251 return true; 252 } 253 if (down) { 254 mGotDelete = true; 255 mDelSelStart = oldStart; 256 mDelSelEnd = oldEnd; 257 } 258 } 259 260 if (mSingle && (KeyEvent.KEYCODE_ENTER == keyCode 261 || KeyEvent.KEYCODE_NUMPAD_ENTER == keyCode)) { 262 if (isPopupShowing()) { 263 return super.dispatchKeyEvent(event); 264 } 265 if (!down) { 266 // Hide the keyboard, since the user has just submitted this 267 // form. The submission happens thanks to the two calls 268 // to sendDomEvent. 269 InputMethodManager.getInstance(mContext) 270 .hideSoftInputFromWindow(getWindowToken(), 0); 271 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, keyCode)); 272 sendDomEvent(event); 273 } 274 return super.dispatchKeyEvent(event); 275 } else if (KeyEvent.KEYCODE_DPAD_CENTER == keyCode) { 276 // Note that this handles center key and trackball. 277 if (isPopupShowing()) { 278 return super.dispatchKeyEvent(event); 279 } 280 // Center key should be passed to a potential onClick 281 if (!down) { 282 mWebView.centerKeyPressOnTextField(); 283 } 284 // Pass to super to handle longpress. 285 return super.dispatchKeyEvent(event); 286 } 287 288 // Ensure there is a layout so arrow keys are handled properly. 289 if (getLayout() == null) { 290 measure(mWidthSpec, mHeightSpec); 291 } 292 293 int oldLength = text.length(); 294 boolean maxedOut = mMaxLength != -1 && oldLength == mMaxLength; 295 // If we are at max length, and there is a selection rather than a 296 // cursor, we need to store the text to compare later, since the key 297 // may have changed the string. 298 String oldText; 299 if (maxedOut && oldEnd != oldStart) { 300 oldText = text.toString(); 301 } else { 302 oldText = ""; 303 } 304 if (super.dispatchKeyEvent(event)) { 305 // If the WebTextView handled the key it was either an alphanumeric 306 // key, a delete, or a movement within the text. All of those are 307 // ok to pass to javascript. 308 309 // UNLESS there is a max length determined by the html. In that 310 // case, if the string was already at the max length, an 311 // alphanumeric key will be erased by the LengthFilter, 312 // so do not pass down to javascript, and instead 313 // return true. If it is an arrow key or a delete key, we can go 314 // ahead and pass it down. 315 if (KeyEvent.KEYCODE_ENTER == keyCode 316 || KeyEvent.KEYCODE_NUMPAD_ENTER == keyCode) { 317 // For multi-line text boxes, newlines will 318 // trigger onTextChanged for key down (which will send both 319 // key up and key down) but not key up. 320 mGotEnterDown = true; 321 } 322 if (maxedOut && !isArrowKey && keyCode != KeyEvent.KEYCODE_DEL) { 323 if (oldEnd == oldStart) { 324 // Return true so the key gets dropped. 325 return true; 326 } else if (!oldText.equals(getText().toString())) { 327 // FIXME: This makes the text work properly, but it 328 // does not pass down the key event, so it may not 329 // work for a textfield that has the type of 330 // behavior of GoogleSuggest. That said, it is 331 // unlikely that a site would combine the two in 332 // one textfield. 333 Spannable span = (Spannable) getText(); 334 int newStart = Selection.getSelectionStart(span); 335 int newEnd = Selection.getSelectionEnd(span); 336 mWebView.replaceTextfieldText(0, oldLength, span.toString(), 337 newStart, newEnd); 338 return true; 339 } 340 } 341 /* FIXME: 342 * In theory, we would like to send the events for the arrow keys. 343 * However, the TextView can arbitrarily change the selection (i.e. 344 * long press followed by using the trackball). Therefore, we keep 345 * in sync with the TextView via onSelectionChanged. If we also 346 * send the DOM event, we lose the correct selection. 347 if (isArrowKey) { 348 // Arrow key does not change the text, but we still want to send 349 // the DOM events. 350 sendDomEvent(event); 351 } 352 */ 353 return true; 354 } 355 // Ignore the key up event for newlines. This prevents 356 // multiple newlines in the native textarea. 357 if (mGotEnterDown && !down) { 358 return true; 359 } 360 // if it is a navigation key, pass it to WebView 361 if (isArrowKey) { 362 // WebView check the trackballtime in onKeyDown to avoid calling 363 // native from both trackball and key handling. As this is called 364 // from WebTextView, we always want WebView to check with native. 365 // Reset trackballtime to ensure it. 366 mWebView.resetTrackballTime(); 367 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 368 .onKeyUp(keyCode, event); 369 } 370 return false; 371 } 372 373 void ensureLayout() { 374 if (getLayout() == null) { 375 // Ensure we have a Layout 376 measure(mWidthSpec, mHeightSpec); 377 LayoutParams params = (LayoutParams) getLayoutParams(); 378 if (params != null) { 379 layout(params.x, params.y, params.x + params.width, 380 params.y + params.height); 381 } 382 } 383 } 384 385 /* package */ ResultReceiver getResultReceiver() { return mReceiver; } 386 387 /** 388 * Determine whether this WebTextView currently represents the node 389 * represented by ptr. 390 * @param ptr Pointer to a node to compare to. 391 * @return boolean Whether this WebTextView already represents the node 392 * pointed to by ptr. 393 */ 394 /* package */ boolean isSameTextField(int ptr) { 395 return ptr == mNodePointer; 396 } 397 398 /** 399 * Ensure that the underlying text field/area is lined up with the WebTextView. 400 */ 401 private void lineUpScroll() { 402 Layout layout = getLayout(); 403 if (mWebView != null && layout != null) { 404 if (mSingle) { 405 // textfields only need to be lined up horizontally. 406 float maxScrollX = layout.getLineRight(0) - getWidth(); 407 if (DebugFlags.WEB_TEXT_VIEW) { 408 Log.v(LOGTAG, "onTouchEvent x=" + mScrollX + " y=" 409 + mScrollY + " maxX=" + maxScrollX); 410 } 411 mWebView.scrollFocusedTextInputX(maxScrollX > 0 ? 412 mScrollX / maxScrollX : 0); 413 } else { 414 // textareas only need to be lined up vertically. 415 mWebView.scrollFocusedTextInputY(mScrollY); 416 } 417 } 418 } 419 420 @Override 421 protected void makeNewLayout(int w, int hintWidth, Metrics boring, 422 Metrics hintBoring, int ellipsisWidth, boolean bringIntoView) { 423 // Necessary to get a Layout to work with, and to do the other work that 424 // makeNewLayout does. 425 super.makeNewLayout(w, hintWidth, boring, hintBoring, ellipsisWidth, 426 bringIntoView); 427 lineUpScroll(); 428 } 429 430 /** 431 * Custom layout which figures out its line spacing. If -1 is passed in for 432 * the height, it will use the ascent and descent from the paint to 433 * determine the line spacing. Otherwise it will use the spacing provided. 434 */ 435 private static class WebTextViewLayout extends DynamicLayout { 436 private float mLineHeight; 437 private float mDifference; 438 public WebTextViewLayout(CharSequence base, CharSequence display, 439 TextPaint paint, 440 int width, Alignment align, 441 float spacingMult, float spacingAdd, 442 boolean includepad, 443 TextUtils.TruncateAt ellipsize, int ellipsizedWidth, 444 float lineHeight) { 445 super(base, display, paint, width, align, spacingMult, spacingAdd, 446 includepad, ellipsize, ellipsizedWidth); 447 float paintLineHeight = paint.descent() - paint.ascent(); 448 if (lineHeight == -1f) { 449 mLineHeight = paintLineHeight; 450 mDifference = 0f; 451 } else { 452 mLineHeight = lineHeight; 453 // Through trial and error, I found this calculation to improve 454 // the accuracy of line placement. 455 mDifference = (lineHeight - paintLineHeight) / 2; 456 } 457 } 458 459 @Override 460 public int getLineTop(int line) { 461 return Math.round(mLineHeight * line - mDifference); 462 } 463 } 464 465 @Override public InputConnection onCreateInputConnection( 466 EditorInfo outAttrs) { 467 InputConnection connection = super.onCreateInputConnection(outAttrs); 468 if (mWebView != null) { 469 // Use the name of the textfield + the url. Use backslash as an 470 // arbitrary separator. 471 outAttrs.fieldName = mWebView.nativeFocusCandidateName() + "\\" 472 + mWebView.getUrl(); 473 } 474 return connection; 475 } 476 477 @Override 478 public void onEditorAction(int actionCode) { 479 switch (actionCode) { 480 case EditorInfo.IME_ACTION_NEXT: 481 if (mWebView.nativeMoveCursorToNextTextInput()) { 482 // Preemptively rebuild the WebTextView, so that the action will 483 // be set properly. 484 mWebView.rebuildWebTextView(); 485 setDefaultSelection(); 486 mWebView.invalidate(); 487 } 488 break; 489 case EditorInfo.IME_ACTION_DONE: 490 super.onEditorAction(actionCode); 491 break; 492 case EditorInfo.IME_ACTION_GO: 493 case EditorInfo.IME_ACTION_SEARCH: 494 // Send an enter and hide the soft keyboard 495 InputMethodManager.getInstance(mContext) 496 .hideSoftInputFromWindow(getWindowToken(), 0); 497 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 498 KeyEvent.KEYCODE_ENTER)); 499 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 500 KeyEvent.KEYCODE_ENTER)); 501 502 default: 503 break; 504 } 505 } 506 507 @Override 508 protected void onFocusChanged(boolean focused, int direction, 509 Rect previouslyFocusedRect) { 510 mFromFocusChange = true; 511 super.onFocusChanged(focused, direction, previouslyFocusedRect); 512 if (focused) { 513 mWebView.setActive(true); 514 } else if (!mInsideRemove) { 515 mWebView.setActive(false); 516 } 517 mFromFocusChange = false; 518 } 519 520 // AdapterView.OnItemClickListener implementation 521 522 @Override 523 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 524 if (id == 0 && position == 0) { 525 // Blank out the text box while we wait for WebCore to fill the form. 526 replaceText(""); 527 WebSettings settings = mWebView.getSettings(); 528 if (mAutoFillProfileIsSet) { 529 // Call a webview method to tell WebCore to autofill the form. 530 mWebView.autoFillForm(mQueryId); 531 } else { 532 // There is no autofill profile setup yet and the user has 533 // elected to try and set one up. Call through to the 534 // embedder to action that. 535 mWebView.getWebChromeClient().setupAutoFill( 536 mHandler.obtainMessage(AUTOFILL_FORM)); 537 } 538 } 539 } 540 541 @Override 542 protected void onScrollChanged(int l, int t, int oldl, int oldt) { 543 super.onScrollChanged(l, t, oldl, oldt); 544 lineUpScroll(); 545 } 546 547 @Override 548 protected void onSelectionChanged(int selStart, int selEnd) { 549 if (!mFromWebKit && !mFromFocusChange && !mFromSetInputType 550 && mWebView != null && !mInSetTextAndKeepSelection) { 551 if (DebugFlags.WEB_TEXT_VIEW) { 552 Log.v(LOGTAG, "onSelectionChanged selStart=" + selStart 553 + " selEnd=" + selEnd); 554 } 555 mWebView.setSelection(selStart, selEnd); 556 lineUpScroll(); 557 } 558 } 559 560 @Override 561 protected void onTextChanged(CharSequence s,int start,int before,int count){ 562 super.onTextChanged(s, start, before, count); 563 String postChange = s.toString(); 564 // Prevent calls to setText from invoking onTextChanged (since this will 565 // mean we are on a different textfield). Also prevent the change when 566 // going from a textfield with a string of text to one with a smaller 567 // limit on text length from registering the onTextChanged event. 568 if (mPreChange == null || mPreChange.equals(postChange) || 569 (mMaxLength > -1 && mPreChange.length() > mMaxLength && 570 mPreChange.substring(0, mMaxLength).equals(postChange))) { 571 return; 572 } 573 mPreChange = postChange; 574 if (0 == count) { 575 if (before > 0) { 576 // For this and all changes to the text, update our cache 577 updateCachedTextfield(); 578 if (mGotDelete) { 579 mGotDelete = false; 580 int oldEnd = start + before; 581 if (mDelSelEnd == oldEnd 582 && (mDelSelStart == start 583 || (mDelSelStart == oldEnd && before == 1))) { 584 // If the selection is set up properly before the 585 // delete, send the DOM events. 586 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 587 KeyEvent.KEYCODE_DEL)); 588 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 589 KeyEvent.KEYCODE_DEL)); 590 return; 591 } 592 } 593 // This was simply a delete or a cut, so just delete the 594 // selection. 595 mWebView.deleteSelection(start, start + before); 596 } 597 mGotDelete = false; 598 // before should never be negative, so whether it was a cut 599 // (handled above), or before is 0, in which case nothing has 600 // changed, we should return. 601 return; 602 } 603 // Ensure that this flag gets cleared, since with autocorrect on, a 604 // delete key press may have a more complex result than deleting one 605 // character or the existing selection, so it will not get cleared 606 // above. 607 mGotDelete = false; 608 // Find the last character being replaced. If it can be represented by 609 // events, we will pass them to native (after replacing the beginning 610 // of the changed text), so we can see javascript events. 611 // Otherwise, replace the text being changed (including the last 612 // character) in the textfield. 613 TextUtils.getChars(s, start + count - 1, start + count, mCharacter, 0); 614 KeyCharacterMap kmap = KeyCharacterMap.load(KeyCharacterMap.VIRTUAL_KEYBOARD); 615 KeyEvent[] events = kmap.getEvents(mCharacter); 616 boolean cannotUseKeyEvents = null == events; 617 int charactersFromKeyEvents = cannotUseKeyEvents ? 0 : 1; 618 if (count > 1 || cannotUseKeyEvents) { 619 String replace = s.subSequence(start, 620 start + count - charactersFromKeyEvents).toString(); 621 mWebView.replaceTextfieldText(start, start + before, replace, 622 start + count - charactersFromKeyEvents, 623 start + count - charactersFromKeyEvents); 624 } else { 625 // This corrects the selection which may have been affected by the 626 // trackball or auto-correct. 627 if (DebugFlags.WEB_TEXT_VIEW) { 628 Log.v(LOGTAG, "onTextChanged start=" + start 629 + " start + before=" + (start + before)); 630 } 631 if (!mInSetTextAndKeepSelection) { 632 mWebView.setSelection(start, start + before); 633 } 634 } 635 if (!cannotUseKeyEvents) { 636 int length = events.length; 637 for (int i = 0; i < length; i++) { 638 // We never send modifier keys to native code so don't send them 639 // here either. 640 if (!KeyEvent.isModifierKey(events[i].getKeyCode())) { 641 sendDomEvent(events[i]); 642 } 643 } 644 } 645 updateCachedTextfield(); 646 } 647 648 @Override 649 public boolean onTouchEvent(MotionEvent event) { 650 switch (event.getAction()) { 651 case MotionEvent.ACTION_DOWN: 652 super.onTouchEvent(event); 653 // This event may be the start of a drag, so store it to pass to the 654 // WebView if it is. 655 mDragStartX = event.getX(); 656 mDragStartY = event.getY(); 657 mDragStartTime = event.getEventTime(); 658 mDragSent = false; 659 mScrolled = false; 660 mGotTouchDown = true; 661 mHasPerformedLongClick = false; 662 break; 663 case MotionEvent.ACTION_MOVE: 664 if (mHasPerformedLongClick) { 665 mGotTouchDown = false; 666 return false; 667 } 668 int slop = ViewConfiguration.get(mContext).getScaledTouchSlop(); 669 Spannable buffer = getText(); 670 int initialScrollX = Touch.getInitialScrollX(this, buffer); 671 int initialScrollY = Touch.getInitialScrollY(this, buffer); 672 super.onTouchEvent(event); 673 int dx = Math.abs(mScrollX - initialScrollX); 674 int dy = Math.abs(mScrollY - initialScrollY); 675 // Use a smaller slop when checking to see if we've moved far enough 676 // to scroll the text, because experimentally, slop has shown to be 677 // to big for the case of a small textfield. 678 int smallerSlop = slop/2; 679 if (dx > smallerSlop || dy > smallerSlop) { 680 // Scrolling is handled in onScrollChanged. 681 mScrolled = true; 682 cancelLongPress(); 683 return true; 684 } 685 if (Math.abs((int) event.getX() - mDragStartX) < slop 686 && Math.abs((int) event.getY() - mDragStartY) < slop) { 687 // If the user has not scrolled further than slop, we should not 688 // send the drag. Instead, do nothing, and when the user lifts 689 // their finger, we will change the selection. 690 return true; 691 } 692 if (mWebView != null) { 693 // Only want to set the initial state once. 694 if (!mDragSent) { 695 mWebView.initiateTextFieldDrag(mDragStartX, mDragStartY, 696 mDragStartTime); 697 mDragSent = true; 698 } 699 boolean scrolled = mWebView.textFieldDrag(event); 700 if (scrolled) { 701 mScrolled = true; 702 cancelLongPress(); 703 return true; 704 } 705 } 706 return false; 707 case MotionEvent.ACTION_UP: 708 case MotionEvent.ACTION_CANCEL: 709 super.onTouchEvent(event); 710 if (mHasPerformedLongClick) { 711 mGotTouchDown = false; 712 return false; 713 } 714 if (!mScrolled) { 715 // If the page scrolled, or the TextView scrolled, we do not 716 // want to change the selection 717 cancelLongPress(); 718 if (mGotTouchDown && mWebView != null) { 719 mWebView.touchUpOnTextField(event); 720 } 721 } 722 // Necessary for the WebView to reset its state 723 if (mWebView != null && mDragSent) { 724 mWebView.onTouchEvent(event); 725 } 726 mGotTouchDown = false; 727 break; 728 default: 729 break; 730 } 731 return true; 732 } 733 734 @Override 735 public boolean onTrackballEvent(MotionEvent event) { 736 if (isPopupShowing()) { 737 return super.onTrackballEvent(event); 738 } 739 if (event.getAction() != MotionEvent.ACTION_MOVE) { 740 return false; 741 } 742 Spannable text = getText(); 743 MovementMethod move = getMovementMethod(); 744 if (move != null && getLayout() != null && 745 move.onTrackballEvent(this, text, event)) { 746 // Selection is changed in onSelectionChanged 747 return true; 748 } 749 return false; 750 } 751 752 @Override 753 public boolean performLongClick() { 754 mHasPerformedLongClick = true; 755 return super.performLongClick(); 756 } 757 758 /** 759 * Remove this WebTextView from its host WebView, and return 760 * focus to the host. 761 */ 762 /* package */ void remove() { 763 // hide the soft keyboard when the edit text is out of focus 764 InputMethodManager imm = InputMethodManager.getInstance(mContext); 765 if (imm.isActive(this)) { 766 imm.hideSoftInputFromWindow(getWindowToken(), 0); 767 } 768 mInsideRemove = true; 769 mWebView.removeView(this); 770 mWebView.requestFocus(); 771 mInsideRemove = false; 772 } 773 774 @Override 775 public boolean requestRectangleOnScreen(Rect rectangle, boolean immediate) { 776 // Do nothing, since webkit will put the textfield on screen. 777 return true; 778 } 779 780 /** 781 * Send the DOM events for the specified event. 782 * @param event KeyEvent to be translated into a DOM event. 783 */ 784 private void sendDomEvent(KeyEvent event) { 785 mWebView.passToJavaScript(getText().toString(), event); 786 } 787 788 /** 789 * Always use this instead of setAdapter, as this has features specific to 790 * the WebTextView. 791 */ 792 public void setAdapterCustom(AutoCompleteAdapter adapter) { 793 if (adapter != null) { 794 setInputType(getInputType() 795 | InputType.TYPE_TEXT_FLAG_AUTO_COMPLETE); 796 adapter.setTextView(this); 797 if (mAutoFillable) { 798 setOnItemClickListener(this); 799 } else { 800 setOnItemClickListener(null); 801 } 802 showDropDown(); 803 } else { 804 dismissDropDown(); 805 } 806 super.setAdapter(adapter); 807 } 808 809 /** 810 * This is a special version of ArrayAdapter which changes its text size 811 * to match the text size of its host TextView. 812 */ 813 public static class AutoCompleteAdapter extends ArrayAdapter<String> { 814 private TextView mTextView; 815 816 public AutoCompleteAdapter(Context context, ArrayList<String> entries) { 817 super(context, com.android.internal.R.layout 818 .web_text_view_dropdown, entries); 819 } 820 821 /** 822 * {@inheritDoc} 823 */ 824 @Override 825 public View getView(int position, View convertView, ViewGroup parent) { 826 TextView tv = 827 (TextView) super.getView(position, convertView, parent); 828 if (tv != null && mTextView != null) { 829 tv.setTextSize(mTextView.getTextSize()); 830 } 831 return tv; 832 } 833 834 /** 835 * Set the TextView so we can match its text size. 836 */ 837 private void setTextView(TextView tv) { 838 mTextView = tv; 839 } 840 } 841 842 /** 843 * Sets the selection when the user clicks on a textfield or textarea with 844 * the trackball or center key, or starts typing into it without clicking on 845 * it. 846 */ 847 /* package */ void setDefaultSelection() { 848 Spannable text = (Spannable) getText(); 849 int selection = mSingle ? text.length() : 0; 850 if (Selection.getSelectionStart(text) == selection 851 && Selection.getSelectionEnd(text) == selection) { 852 // The selection of the UI copy is set correctly, but the 853 // WebTextView still needs to inform the webkit thread to set the 854 // selection. Normally that is done in onSelectionChanged, but 855 // onSelectionChanged will not be called because the UI copy is not 856 // changing. (This can happen when the WebTextView takes focus. 857 // That onSelectionChanged was blocked because the selection set 858 // when focusing is not necessarily the desirable selection for 859 // WebTextView.) 860 if (mWebView != null) { 861 mWebView.setSelection(selection, selection); 862 } 863 } else { 864 Selection.setSelection(text, selection, selection); 865 } 866 if (mWebView != null) mWebView.incrementTextGeneration(); 867 } 868 869 @Override 870 public void setInputType(int type) { 871 mFromSetInputType = true; 872 super.setInputType(type); 873 mFromSetInputType = false; 874 } 875 876 private void setMaxLength(int maxLength) { 877 mMaxLength = maxLength; 878 if (-1 == maxLength) { 879 setFilters(NO_FILTERS); 880 } else { 881 setFilters(new InputFilter[] { 882 new InputFilter.LengthFilter(maxLength) }); 883 } 884 } 885 886 /** 887 * Set the pointer for this node so it can be determined which node this 888 * WebTextView represents. 889 * @param ptr Integer representing the pointer to the node which this 890 * WebTextView represents. 891 */ 892 /* package */ void setNodePointer(int ptr) { 893 mNodePointer = ptr; 894 } 895 896 /** 897 * Determine the position and size of WebTextView, and add it to the 898 * WebView's view heirarchy. All parameters are presumed to be in 899 * view coordinates. Also requests Focus and sets the cursor to not 900 * request to be in view. 901 * @param x x-position of the textfield. 902 * @param y y-position of the textfield. 903 * @param width width of the textfield. 904 * @param height height of the textfield. 905 */ 906 /* package */ void setRect(int x, int y, int width, int height) { 907 LayoutParams lp = (LayoutParams) getLayoutParams(); 908 if (null == lp) { 909 lp = new LayoutParams(width, height, x, y); 910 } else { 911 lp.x = x; 912 lp.y = y; 913 lp.width = width; 914 lp.height = height; 915 } 916 if (getParent() == null) { 917 // Insert the view so that it's drawn first (at index 0) 918 mWebView.addView(this, 0, lp); 919 } else { 920 setLayoutParams(lp); 921 } 922 // Set up a measure spec so a layout can always be recreated. 923 mWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY); 924 mHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY); 925 } 926 927 /** 928 * Set the selection, and disable our onSelectionChanged action. 929 */ 930 /* package */ void setSelectionFromWebKit(int start, int end) { 931 if (start < 0 || end < 0) return; 932 Spannable text = (Spannable) getText(); 933 int length = text.length(); 934 if (start > length || end > length) return; 935 mFromWebKit = true; 936 Selection.setSelection(text, start, end); 937 mFromWebKit = false; 938 } 939 940 /** 941 * Update the text size according to the size of the focus candidate's text 942 * size in mWebView. Should only be called from mWebView. 943 */ 944 /* package */ void updateTextSize() { 945 Assert.assertNotNull("updateTextSize should only be called from " 946 + "mWebView, so mWebView should never be null!", mWebView); 947 // Note that this is approximately WebView.contentToViewDimension, 948 // without being rounded. 949 float size = mWebView.nativeFocusCandidateTextSize() 950 * mWebView.getScale(); 951 setTextSize(TypedValue.COMPLEX_UNIT_PX, size); 952 } 953 954 /** 955 * Set the text to the new string, but use the old selection, making sure 956 * to keep it within the new string. 957 * @param text The new text to place in the textfield. 958 */ 959 /* package */ void setTextAndKeepSelection(String text) { 960 mPreChange = text.toString(); 961 Editable edit = getText(); 962 int selStart = Selection.getSelectionStart(edit); 963 int selEnd = Selection.getSelectionEnd(edit); 964 mInSetTextAndKeepSelection = true; 965 edit.replace(0, edit.length(), text); 966 int newLength = edit.length(); 967 if (selStart > newLength) selStart = newLength; 968 if (selEnd > newLength) selEnd = newLength; 969 Selection.setSelection(edit, selStart, selEnd); 970 mInSetTextAndKeepSelection = false; 971 InputMethodManager imm = InputMethodManager.peekInstance(); 972 if (imm != null && imm.isActive(this)) { 973 // Since the text has changed, do not allow the IME to replace the 974 // existing text as though it were a completion. 975 imm.restartInput(this); 976 } 977 updateCachedTextfield(); 978 } 979 980 /** 981 * Called by WebView.rebuildWebTextView(). Based on the type of the <input> 982 * element, set up the WebTextView, its InputType, and IME Options properly. 983 * @param type int corresponding to enum "Type" defined in CachedInput.h. 984 * Does not correspond to HTMLInputElement::InputType so this 985 * is unaffected if that changes, and also because that has no 986 * type corresponding to textarea (which is its own tag). 987 */ 988 /* package */ void setType(int type) { 989 if (mWebView == null) return; 990 boolean single = true; 991 int maxLength = -1; 992 int inputType = InputType.TYPE_CLASS_TEXT 993 | InputType.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT; 994 int imeOptions = EditorInfo.IME_FLAG_NO_EXTRACT_UI 995 | EditorInfo.IME_FLAG_NO_FULLSCREEN; 996 if (TEXT_AREA != type 997 && mWebView.nativeFocusCandidateHasNextTextfield()) { 998 imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT; 999 } 1000 switch (type) { 1001 case NORMAL_TEXT_FIELD: 1002 imeOptions |= EditorInfo.IME_ACTION_GO; 1003 break; 1004 case TEXT_AREA: 1005 single = false; 1006 inputType |= InputType.TYPE_TEXT_FLAG_MULTI_LINE 1007 | InputType.TYPE_TEXT_FLAG_CAP_SENTENCES 1008 | InputType.TYPE_TEXT_FLAG_AUTO_CORRECT; 1009 imeOptions |= EditorInfo.IME_ACTION_NONE; 1010 break; 1011 case PASSWORD: 1012 inputType |= EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 1013 imeOptions |= EditorInfo.IME_ACTION_GO; 1014 break; 1015 case SEARCH: 1016 imeOptions |= EditorInfo.IME_ACTION_SEARCH; 1017 break; 1018 case EMAIL: 1019 // inputType needs to be overwritten because of the different text variation. 1020 inputType = InputType.TYPE_CLASS_TEXT 1021 | InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS; 1022 imeOptions |= EditorInfo.IME_ACTION_GO; 1023 break; 1024 case NUMBER: 1025 // inputType needs to be overwritten because of the different class. 1026 inputType = InputType.TYPE_CLASS_NUMBER | InputType.TYPE_NUMBER_VARIATION_NORMAL; 1027 // Number and telephone do not have both a Tab key and an 1028 // action, so set the action to NEXT 1029 imeOptions |= EditorInfo.IME_ACTION_NEXT; 1030 break; 1031 case TELEPHONE: 1032 // inputType needs to be overwritten because of the different class. 1033 inputType = InputType.TYPE_CLASS_PHONE; 1034 imeOptions |= EditorInfo.IME_ACTION_NEXT; 1035 break; 1036 case URL: 1037 // TYPE_TEXT_VARIATION_URI prevents Tab key from showing, so 1038 // exclude it for now. 1039 imeOptions |= EditorInfo.IME_ACTION_GO; 1040 break; 1041 default: 1042 imeOptions |= EditorInfo.IME_ACTION_GO; 1043 break; 1044 } 1045 setHint(null); 1046 if (single) { 1047 mWebView.requestLabel(mWebView.nativeFocusCandidateFramePointer(), 1048 mNodePointer); 1049 maxLength = mWebView.nativeFocusCandidateMaxLength(); 1050 boolean autoComplete = mWebView.nativeFocusCandidateIsAutoComplete(); 1051 if (type != PASSWORD && (mAutoFillable || autoComplete)) { 1052 String name = mWebView.nativeFocusCandidateName(); 1053 if (name != null && name.length() > 0) { 1054 mWebView.requestFormData(name, mNodePointer, mAutoFillable, 1055 autoComplete); 1056 } 1057 } 1058 } 1059 mSingle = single; 1060 setMaxLength(maxLength); 1061 setHorizontallyScrolling(single); 1062 setInputType(inputType); 1063 setImeOptions(imeOptions); 1064 setVisibility(VISIBLE); 1065 AutoCompleteAdapter adapter = null; 1066 setAdapterCustom(adapter); 1067 } 1068 1069 /** 1070 * Update the cache to reflect the current text. 1071 */ 1072 /* package */ void updateCachedTextfield() { 1073 mWebView.updateCachedTextfield(getText().toString()); 1074 } 1075 1076 /* package */ void setAutoFillProfileIsSet(boolean autoFillProfileIsSet) { 1077 mAutoFillProfileIsSet = autoFillProfileIsSet; 1078 } 1079} 1080