WebTextView.java revision 0f5ad842fb3fbc0df2a4c8028940810782cedacc
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.Canvas; 21import android.graphics.Color; 22import android.graphics.ColorFilter; 23import android.graphics.Paint; 24import android.graphics.PixelFormat; 25import android.graphics.Rect; 26import android.graphics.drawable.Drawable; 27import android.text.Editable; 28import android.text.InputFilter; 29import android.text.Selection; 30import android.text.Spannable; 31import android.text.TextPaint; 32import android.text.TextUtils; 33import android.text.method.MovementMethod; 34import android.text.method.Touch; 35import android.util.Log; 36import android.view.Gravity; 37import android.view.KeyCharacterMap; 38import android.view.KeyEvent; 39import android.view.MotionEvent; 40import android.view.View; 41import android.view.ViewGroup; 42import android.view.inputmethod.EditorInfo; 43import android.view.inputmethod.InputMethodManager; 44import android.view.inputmethod.InputConnection; 45import android.widget.AbsoluteLayout.LayoutParams; 46import android.widget.ArrayAdapter; 47import android.widget.AutoCompleteTextView; 48import android.widget.TextView; 49 50import java.util.ArrayList; 51 52/** 53 * WebTextView is a specialized version of EditText used by WebView 54 * to overlay html textfields (and textareas) to use our standard 55 * text editing. 56 */ 57/* package */ class WebTextView extends AutoCompleteTextView { 58 59 static final String LOGTAG = "webtextview"; 60 61 private WebView mWebView; 62 private boolean mSingle; 63 private int mWidthSpec; 64 private int mHeightSpec; 65 private int mNodePointer; 66 // FIXME: This is a hack for blocking unmatched key ups, in particular 67 // on the enter key. The method for blocking unmatched key ups prevents 68 // the shift key from working properly. 69 private boolean mGotEnterDown; 70 private int mMaxLength; 71 // Keep track of the text before the change so we know whether we actually 72 // need to send down the DOM events. 73 private String mPreChange; 74 private Drawable mBackground; 75 // Variables for keeping track of the touch down, to send to the WebView 76 // when a drag starts 77 private float mDragStartX; 78 private float mDragStartY; 79 private long mDragStartTime; 80 private boolean mDragSent; 81 // Array to store the final character added in onTextChanged, so that its 82 // KeyEvents may be determined. 83 private char[] mCharacter = new char[1]; 84 // This is used to reset the length filter when on a textfield 85 // with no max length. 86 // FIXME: This can be replaced with TextView.NO_FILTERS if that 87 // is made public/protected. 88 private static final InputFilter[] NO_FILTERS = new InputFilter[0]; 89 90 /** 91 * Create a new WebTextView. 92 * @param context The Context for this WebTextView. 93 * @param webView The WebView that created this. 94 */ 95 /* package */ WebTextView(Context context, WebView webView) { 96 super(context); 97 mWebView = webView; 98 mMaxLength = -1; 99 setImeOptions(EditorInfo.IME_ACTION_NONE); 100 } 101 102 @Override 103 public boolean dispatchKeyEvent(KeyEvent event) { 104 if (event.isSystem()) { 105 return super.dispatchKeyEvent(event); 106 } 107 // Treat ACTION_DOWN and ACTION MULTIPLE the same 108 boolean down = event.getAction() != KeyEvent.ACTION_UP; 109 int keyCode = event.getKeyCode(); 110 111 boolean isArrowKey = false; 112 switch(keyCode) { 113 case KeyEvent.KEYCODE_DPAD_LEFT: 114 case KeyEvent.KEYCODE_DPAD_RIGHT: 115 case KeyEvent.KEYCODE_DPAD_UP: 116 case KeyEvent.KEYCODE_DPAD_DOWN: 117 if (!mWebView.nativeCursorMatchesFocus()) { 118 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 119 .onKeyUp(keyCode, event); 120 121 } 122 isArrowKey = true; 123 break; 124 } 125 126 if (!isArrowKey && mWebView.nativeFocusNodePointer() != mNodePointer) { 127 mWebView.nativeClearCursor(); 128 // Do not call remove() here, which hides the soft keyboard. If 129 // the soft keyboard is being displayed, the user will still want 130 // it there. 131 mWebView.removeView(this); 132 mWebView.requestFocus(); 133 return mWebView.dispatchKeyEvent(event); 134 } 135 136 Spannable text = (Spannable) getText(); 137 int oldLength = text.length(); 138 // Normally the delete key's dom events are sent via onTextChanged. 139 // However, if the length is zero, the text did not change, so we 140 // go ahead and pass the key down immediately. 141 if (KeyEvent.KEYCODE_DEL == keyCode && 0 == oldLength) { 142 sendDomEvent(event); 143 return true; 144 } 145 146 if ((mSingle && KeyEvent.KEYCODE_ENTER == keyCode)) { 147 if (isPopupShowing()) { 148 return super.dispatchKeyEvent(event); 149 } 150 if (!down) { 151 // Hide the keyboard, since the user has just submitted this 152 // form. The submission happens thanks to the two calls 153 // to sendDomEvent. 154 InputMethodManager.getInstance(mContext) 155 .hideSoftInputFromWindow(getWindowToken(), 0); 156 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, keyCode)); 157 sendDomEvent(event); 158 } 159 return super.dispatchKeyEvent(event); 160 } else if (KeyEvent.KEYCODE_DPAD_CENTER == keyCode) { 161 // Note that this handles center key and trackball. 162 if (isPopupShowing()) { 163 return super.dispatchKeyEvent(event); 164 } 165 if (!mWebView.nativeCursorMatchesFocus()) { 166 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 167 .onKeyUp(keyCode, event); 168 } 169 // Center key should be passed to a potential onClick 170 if (!down) { 171 mWebView.shortPressOnTextField(); 172 } 173 // Pass to super to handle longpress. 174 return super.dispatchKeyEvent(event); 175 } 176 177 // Ensure there is a layout so arrow keys are handled properly. 178 if (getLayout() == null) { 179 measure(mWidthSpec, mHeightSpec); 180 } 181 int oldStart = Selection.getSelectionStart(text); 182 int oldEnd = Selection.getSelectionEnd(text); 183 184 boolean maxedOut = mMaxLength != -1 && oldLength == mMaxLength; 185 // If we are at max length, and there is a selection rather than a 186 // cursor, we need to store the text to compare later, since the key 187 // may have changed the string. 188 String oldText; 189 if (maxedOut && oldEnd != oldStart) { 190 oldText = text.toString(); 191 } else { 192 oldText = ""; 193 } 194 if (super.dispatchKeyEvent(event)) { 195 // If the WebTextView handled the key it was either an alphanumeric 196 // key, a delete, or a movement within the text. All of those are 197 // ok to pass to javascript. 198 199 // UNLESS there is a max length determined by the html. In that 200 // case, if the string was already at the max length, an 201 // alphanumeric key will be erased by the LengthFilter, 202 // so do not pass down to javascript, and instead 203 // return true. If it is an arrow key or a delete key, we can go 204 // ahead and pass it down. 205 if (KeyEvent.KEYCODE_ENTER == keyCode) { 206 // For multi-line text boxes, newlines will 207 // trigger onTextChanged for key down (which will send both 208 // key up and key down) but not key up. 209 mGotEnterDown = true; 210 } 211 if (maxedOut && !isArrowKey && keyCode != KeyEvent.KEYCODE_DEL) { 212 if (oldEnd == oldStart) { 213 // Return true so the key gets dropped. 214 return true; 215 } else if (!oldText.equals(getText().toString())) { 216 // FIXME: This makes the text work properly, but it 217 // does not pass down the key event, so it may not 218 // work for a textfield that has the type of 219 // behavior of GoogleSuggest. That said, it is 220 // unlikely that a site would combine the two in 221 // one textfield. 222 Spannable span = (Spannable) getText(); 223 int newStart = Selection.getSelectionStart(span); 224 int newEnd = Selection.getSelectionEnd(span); 225 mWebView.replaceTextfieldText(0, oldLength, span.toString(), 226 newStart, newEnd); 227 return true; 228 } 229 } 230 /* FIXME: 231 * In theory, we would like to send the events for the arrow keys. 232 * However, the TextView can arbitrarily change the selection (i.e. 233 * long press followed by using the trackball). Therefore, we keep 234 * in sync with the TextView via onSelectionChanged. If we also 235 * send the DOM event, we lose the correct selection. 236 if (isArrowKey) { 237 // Arrow key does not change the text, but we still want to send 238 // the DOM events. 239 sendDomEvent(event); 240 } 241 */ 242 return true; 243 } 244 // Ignore the key up event for newlines. This prevents 245 // multiple newlines in the native textarea. 246 if (mGotEnterDown && !down) { 247 return true; 248 } 249 // if it is a navigation key, pass it to WebView 250 if (isArrowKey) { 251 // WebView check the trackballtime in onKeyDown to avoid calling 252 // native from both trackball and key handling. As this is called 253 // from WebTextView, we always want WebView to check with native. 254 // Reset trackballtime to ensure it. 255 mWebView.resetTrackballTime(); 256 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 257 .onKeyUp(keyCode, event); 258 } 259 return false; 260 } 261 262 /** 263 * Create a fake touch up event at (x,y) with respect to this WebTextView. 264 * This is used by WebView to act as though a touch event which happened 265 * before we placed the WebTextView actually hit it, so that it can place 266 * the cursor accordingly. 267 */ 268 /* package */ void fakeTouchEvent(float x, float y) { 269 // We need to ensure that there is a Layout, since the Layout is used 270 // in determining where to place the cursor. 271 if (getLayout() == null) { 272 measure(mWidthSpec, mHeightSpec); 273 } 274 // Create a fake touch up, which is used to place the cursor. 275 MotionEvent ev = MotionEvent.obtain(0, 0, MotionEvent.ACTION_UP, 276 x, y, 0); 277 onTouchEvent(ev); 278 ev.recycle(); 279 } 280 281 /** 282 * Determine whether this WebTextView currently represents the node 283 * represented by ptr. 284 * @param ptr Pointer to a node to compare to. 285 * @return boolean Whether this WebTextView already represents the node 286 * pointed to by ptr. 287 */ 288 /* package */ boolean isSameTextField(int ptr) { 289 return ptr == mNodePointer; 290 } 291 292 @Override public InputConnection onCreateInputConnection( 293 EditorInfo outAttrs) { 294 InputConnection connection = super.onCreateInputConnection(outAttrs); 295 if (mWebView != null) { 296 // Use the name of the textfield + the url. Use backslash as an 297 // arbitrary separator. 298 outAttrs.fieldName = mWebView.nativeFocusCandidateName() + "\\" 299 + mWebView.getUrl(); 300 } 301 return connection; 302 } 303 304 @Override 305 protected void onSelectionChanged(int selStart, int selEnd) { 306 if (mWebView != null) { 307 if (DebugFlags.WEB_TEXT_VIEW) { 308 Log.v(LOGTAG, "onSelectionChanged selStart=" + selStart 309 + " selEnd=" + selEnd); 310 } 311 mWebView.setSelection(selStart, selEnd); 312 } 313 } 314 315 @Override 316 protected void onTextChanged(CharSequence s,int start,int before,int count){ 317 super.onTextChanged(s, start, before, count); 318 String postChange = s.toString(); 319 // Prevent calls to setText from invoking onTextChanged (since this will 320 // mean we are on a different textfield). Also prevent the change when 321 // going from a textfield with a string of text to one with a smaller 322 // limit on text length from registering the onTextChanged event. 323 if (mPreChange == null || mPreChange.equals(postChange) || 324 (mMaxLength > -1 && mPreChange.length() > mMaxLength && 325 mPreChange.substring(0, mMaxLength).equals(postChange))) { 326 return; 327 } 328 mPreChange = postChange; 329 // This was simply a delete or a cut, so just delete the selection. 330 if (before > 0 && 0 == count) { 331 mWebView.deleteSelection(start, start + before); 332 // For this and all changes to the text, update our cache 333 updateCachedTextfield(); 334 return; 335 } 336 // Find the last character being replaced. If it can be represented by 337 // events, we will pass them to native (after replacing the beginning 338 // of the changed text), so we can see javascript events. 339 // Otherwise, replace the text being changed (including the last 340 // character) in the textfield. 341 TextUtils.getChars(s, start + count - 1, start + count, mCharacter, 0); 342 KeyCharacterMap kmap = 343 KeyCharacterMap.load(KeyCharacterMap.BUILT_IN_KEYBOARD); 344 KeyEvent[] events = kmap.getEvents(mCharacter); 345 boolean cannotUseKeyEvents = null == events; 346 int charactersFromKeyEvents = cannotUseKeyEvents ? 0 : 1; 347 if (count > 1 || cannotUseKeyEvents) { 348 String replace = s.subSequence(start, 349 start + count - charactersFromKeyEvents).toString(); 350 mWebView.replaceTextfieldText(start, start + before, replace, 351 start + count - charactersFromKeyEvents, 352 start + count - charactersFromKeyEvents); 353 } else { 354 // This corrects the selection which may have been affected by the 355 // trackball or auto-correct. 356 if (DebugFlags.WEB_TEXT_VIEW) { 357 Log.v(LOGTAG, "onTextChanged start=" + start 358 + " start + before=" + (start + before)); 359 } 360 mWebView.setSelection(start, start + before); 361 } 362 if (!cannotUseKeyEvents) { 363 int length = events.length; 364 for (int i = 0; i < length; i++) { 365 // We never send modifier keys to native code so don't send them 366 // here either. 367 if (!KeyEvent.isModifierKey(events[i].getKeyCode())) { 368 sendDomEvent(events[i]); 369 } 370 } 371 } 372 updateCachedTextfield(); 373 } 374 375 @Override 376 public boolean onTouchEvent(MotionEvent event) { 377 int initialScrollX = -1; 378 int initialScrollY = -1; 379 int selectionStart = -1; 380 int selectionEnd = -1; 381 int action = event.getAction(); 382 if (action == MotionEvent.ACTION_MOVE) { 383 Spannable buffer = getText(); 384 initialScrollX = Touch.getInitialScrollX(this, buffer); 385 initialScrollY = Touch.getInitialScrollY(this, buffer); 386 selectionStart = Selection.getSelectionStart(buffer); 387 selectionEnd = Selection.getSelectionEnd(buffer); 388 } 389 super.onTouchEvent(event); 390 switch (action) { 391 case MotionEvent.ACTION_DOWN: 392 // This event may be the start of a drag, so store it to pass to the 393 // WebView if it is. 394 mDragStartX = event.getX(); 395 mDragStartY = event.getY(); 396 mDragStartTime = event.getEventTime(); 397 mDragSent = false; 398 break; 399 case MotionEvent.ACTION_MOVE: 400 if (mScrollX != initialScrollX 401 || mScrollY != initialScrollY) { 402 // TextView scrolled, so return true. 403 // FIXME: Need to make the webkit text scroll to reflect this 404 return true; 405 } 406 if (Selection.getSelectionStart(getText()) != selectionStart 407 || Selection.getSelectionEnd(getText()) != selectionEnd) { 408 // Selection changed, so return true 409 return true; 410 } 411 if (mWebView != null) { 412 // Only want to set the initial state once. 413 if (!mDragSent) { 414 mWebView.initiateTextFieldDrag(mDragStartX, mDragStartY, 415 mDragStartTime); 416 mDragSent = true; 417 } 418 return mWebView.textFieldDrag(event); 419 } 420 return false; 421 case MotionEvent.ACTION_UP: 422 case MotionEvent.ACTION_CANCEL: 423 // Necessary for the WebView to reset its state 424 if (mWebView != null && mDragSent) { 425 mWebView.onTouchEvent(event); 426 } 427 break; 428 default: 429 break; 430 } 431 return true; 432 } 433 434 @Override 435 public boolean onTrackballEvent(MotionEvent event) { 436 if (isPopupShowing()) { 437 return super.onTrackballEvent(event); 438 } 439 if (event.getAction() != MotionEvent.ACTION_MOVE) { 440 return false; 441 } 442 // If the Cursor is not on the text input, webview should handle the 443 // trackball 444 if (!mWebView.nativeCursorMatchesFocus()) { 445 return mWebView.onTrackballEvent(event); 446 } 447 Spannable text = (Spannable) getText(); 448 MovementMethod move = getMovementMethod(); 449 if (move != null && getLayout() != null && 450 move.onTrackballEvent(this, text, event)) { 451 // Selection is changed in onSelectionChanged 452 return true; 453 } 454 return false; 455 } 456 457 /** 458 * Remove this WebTextView from its host WebView, and return 459 * focus to the host. 460 */ 461 /* package */ void remove() { 462 // hide the soft keyboard when the edit text is out of focus 463 InputMethodManager.getInstance(mContext).hideSoftInputFromWindow( 464 getWindowToken(), 0); 465 mWebView.removeView(this); 466 mWebView.requestFocus(); 467 } 468 469 /* package */ void bringIntoView() { 470 if (getLayout() != null) { 471 bringPointIntoView(Selection.getSelectionEnd(getText())); 472 } 473 } 474 475 /** 476 * Send the DOM events for the specified event. 477 * @param event KeyEvent to be translated into a DOM event. 478 */ 479 private void sendDomEvent(KeyEvent event) { 480 mWebView.passToJavaScript(getText().toString(), event); 481 } 482 483 /** 484 * Always use this instead of setAdapter, as this has features specific to 485 * the WebTextView. 486 */ 487 public void setAdapterCustom(AutoCompleteAdapter adapter) { 488 if (adapter != null) { 489 setInputType(EditorInfo.TYPE_TEXT_FLAG_AUTO_COMPLETE); 490 adapter.setTextView(this); 491 } 492 super.setAdapter(adapter); 493 } 494 495 /** 496 * This is a special version of ArrayAdapter which changes its text size 497 * to match the text size of its host TextView. 498 */ 499 public static class AutoCompleteAdapter extends ArrayAdapter<String> { 500 private TextView mTextView; 501 502 public AutoCompleteAdapter(Context context, ArrayList<String> entries) { 503 super(context, com.android.internal.R.layout 504 .search_dropdown_item_1line, entries); 505 } 506 507 /** 508 * {@inheritDoc} 509 */ 510 public View getView(int position, View convertView, ViewGroup parent) { 511 TextView tv = 512 (TextView) super.getView(position, convertView, parent); 513 if (tv != null && mTextView != null) { 514 tv.setTextSize(mTextView.getTextSize()); 515 } 516 return tv; 517 } 518 519 /** 520 * Set the TextView so we can match its text size. 521 */ 522 private void setTextView(TextView tv) { 523 mTextView = tv; 524 } 525 } 526 527 /** 528 * Determine whether to use the system-wide password disguising method, 529 * or to use none. 530 * @param inPassword True if the textfield is a password field. 531 */ 532 /* package */ void setInPassword(boolean inPassword) { 533 if (inPassword) { 534 setInputType(EditorInfo.TYPE_CLASS_TEXT | EditorInfo. 535 TYPE_TEXT_VARIATION_PASSWORD); 536 createBackground(); 537 } 538 // For password fields, draw the WebTextView. For others, just show 539 // webkit's drawing. 540 setWillNotDraw(!inPassword); 541 setBackgroundDrawable(inPassword ? mBackground : null); 542 // For non-password fields, avoid the invals from TextView's blinking 543 // cursor 544 setCursorVisible(inPassword); 545 } 546 547 /** 548 * Private class used for the background of a password textfield. 549 */ 550 private static class OutlineDrawable extends Drawable { 551 public void draw(Canvas canvas) { 552 Rect bounds = getBounds(); 553 Paint paint = new Paint(); 554 paint.setAntiAlias(true); 555 // Draw the background. 556 paint.setColor(Color.WHITE); 557 canvas.drawRect(bounds, paint); 558 // Draw the outline. 559 paint.setStyle(Paint.Style.STROKE); 560 paint.setColor(Color.BLACK); 561 canvas.drawRect(bounds, paint); 562 } 563 // Always want it to be opaque. 564 public int getOpacity() { 565 return PixelFormat.OPAQUE; 566 } 567 // These are needed because they are abstract in Drawable. 568 public void setAlpha(int alpha) { } 569 public void setColorFilter(ColorFilter cf) { } 570 } 571 572 /** 573 * Create a background for the WebTextView and set up the paint for drawing 574 * the text. This way, we can see the password transformation of the 575 * system, which (optionally) shows the actual text before changing to dots. 576 * The background is necessary to hide the webkit-drawn text beneath. 577 */ 578 private void createBackground() { 579 if (mBackground != null) { 580 return; 581 } 582 mBackground = new OutlineDrawable(); 583 584 setGravity(Gravity.CENTER_VERTICAL); 585 // Turn on subpixel text, and turn off kerning, so it better matches 586 // the text in webkit. 587 TextPaint paint = getPaint(); 588 int flags = paint.getFlags() | Paint.SUBPIXEL_TEXT_FLAG | 589 Paint.ANTI_ALIAS_FLAG & ~Paint.DEV_KERN_TEXT_FLAG; 590 paint.setFlags(flags); 591 // Set the text color to black, regardless of the theme. This ensures 592 // that other applications that use embedded WebViews will properly 593 // display the text in password textfields. 594 setTextColor(Color.BLACK); 595 } 596 597 /* package */ void setMaxLength(int maxLength) { 598 mMaxLength = maxLength; 599 if (-1 == maxLength) { 600 setFilters(NO_FILTERS); 601 } else { 602 setFilters(new InputFilter[] { 603 new InputFilter.LengthFilter(maxLength) }); 604 } 605 } 606 607 /** 608 * Set the pointer for this node so it can be determined which node this 609 * WebTextView represents. 610 * @param ptr Integer representing the pointer to the node which this 611 * WebTextView represents. 612 */ 613 /* package */ void setNodePointer(int ptr) { 614 mNodePointer = ptr; 615 } 616 617 /** 618 * Determine the position and size of WebTextView, and add it to the 619 * WebView's view heirarchy. All parameters are presumed to be in 620 * view coordinates. Also requests Focus and sets the cursor to not 621 * request to be in view. 622 * @param x x-position of the textfield. 623 * @param y y-position of the textfield. 624 * @param width width of the textfield. 625 * @param height height of the textfield. 626 */ 627 /* package */ void setRect(int x, int y, int width, int height) { 628 LayoutParams lp = (LayoutParams) getLayoutParams(); 629 if (null == lp) { 630 lp = new LayoutParams(width, height, x, y); 631 } else { 632 lp.x = x; 633 lp.y = y; 634 lp.width = width; 635 lp.height = height; 636 } 637 if (getParent() == null) { 638 mWebView.addView(this, lp); 639 } else { 640 setLayoutParams(lp); 641 } 642 // Set up a measure spec so a layout can always be recreated. 643 mWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY); 644 mHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY); 645 requestFocus(); 646 } 647 648 /** 649 * Set whether this is a single-line textfield or a multi-line textarea. 650 * Textfields scroll horizontally, and do not handle the enter key. 651 * Textareas behave oppositely. 652 * Do NOT call this after calling setInPassword(true). This will result in 653 * removing the password input type. 654 */ 655 public void setSingleLine(boolean single) { 656 int inputType = EditorInfo.TYPE_CLASS_TEXT 657 | EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT; 658 if (!single) { 659 inputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE 660 | EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES 661 | EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT; 662 } 663 mSingle = single; 664 setHorizontallyScrolling(single); 665 setInputType(inputType); 666 } 667 668 /** 669 * Set the text for this WebTextView, and set the selection to (start, end) 670 * @param text Text to go into this WebTextView. 671 * @param start Beginning of the selection. 672 * @param end End of the selection. 673 */ 674 /* package */ void setText(CharSequence text, int start, int end) { 675 mPreChange = text.toString(); 676 setText(text); 677 Spannable span = (Spannable) getText(); 678 int length = span.length(); 679 if (end > length) { 680 end = length; 681 } 682 if (start < 0) { 683 start = 0; 684 } else if (start > length) { 685 start = length; 686 } 687 if (DebugFlags.WEB_TEXT_VIEW) { 688 Log.v(LOGTAG, "setText start=" + start 689 + " end=" + end); 690 } 691 Selection.setSelection(span, start, end); 692 } 693 694 /** 695 * Set the text to the new string, but use the old selection, making sure 696 * to keep it within the new string. 697 * @param text The new text to place in the textfield. 698 */ 699 /* package */ void setTextAndKeepSelection(String text) { 700 mPreChange = text.toString(); 701 Editable edit = (Editable) getText(); 702 edit.replace(0, edit.length(), text); 703 updateCachedTextfield(); 704 } 705 706 /** 707 * Update the cache to reflect the current text. 708 */ 709 /* package */ void updateCachedTextfield() { 710 mWebView.updateCachedTextfield(getText().toString()); 711 } 712} 713