WebTextView.java revision ef92e7a606167130d4ae52c1e23f32c3f0af291e
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 // True if the most recent drag event has caused either the TextView to 82 // scroll or the web page to scroll. Gets reset after a touch down. 83 private boolean mScrolled; 84 // Gets set to true when the the IME jumps to the next textfield. When this 85 // happens, the next time the user hits a key it is okay for the focus 86 // pointer to not match the WebTextView's node pointer 87 private boolean mOkayForFocusNotToMatch; 88 // Whether or not a selection change was generated from webkit. If it was, 89 // we do not need to pass the selection back to webkit. 90 private boolean mFromWebKit; 91 private boolean mGotTouchDown; 92 // Array to store the final character added in onTextChanged, so that its 93 // KeyEvents may be determined. 94 private char[] mCharacter = new char[1]; 95 // This is used to reset the length filter when on a textfield 96 // with no max length. 97 // FIXME: This can be replaced with TextView.NO_FILTERS if that 98 // is made public/protected. 99 private static final InputFilter[] NO_FILTERS = new InputFilter[0]; 100 101 /** 102 * Create a new WebTextView. 103 * @param context The Context for this WebTextView. 104 * @param webView The WebView that created this. 105 */ 106 /* package */ WebTextView(Context context, WebView webView) { 107 super(context); 108 mWebView = webView; 109 mMaxLength = -1; 110 } 111 112 @Override 113 public boolean dispatchKeyEvent(KeyEvent event) { 114 if (event.isSystem()) { 115 return super.dispatchKeyEvent(event); 116 } 117 // Treat ACTION_DOWN and ACTION MULTIPLE the same 118 boolean down = event.getAction() != KeyEvent.ACTION_UP; 119 int keyCode = event.getKeyCode(); 120 121 boolean isArrowKey = false; 122 switch(keyCode) { 123 case KeyEvent.KEYCODE_DPAD_LEFT: 124 case KeyEvent.KEYCODE_DPAD_RIGHT: 125 case KeyEvent.KEYCODE_DPAD_UP: 126 case KeyEvent.KEYCODE_DPAD_DOWN: 127 if (!mWebView.nativeCursorMatchesFocus()) { 128 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 129 .onKeyUp(keyCode, event); 130 131 } 132 isArrowKey = true; 133 break; 134 } 135 if (!isArrowKey && !mOkayForFocusNotToMatch 136 && mWebView.nativeFocusNodePointer() != mNodePointer) { 137 mWebView.nativeClearCursor(); 138 // Do not call remove() here, which hides the soft keyboard. If 139 // the soft keyboard is being displayed, the user will still want 140 // it there. 141 mWebView.removeView(this); 142 mWebView.requestFocus(); 143 return mWebView.dispatchKeyEvent(event); 144 } 145 // After a jump to next textfield and the first key press, the cursor 146 // and focus will once again match, so reset this value. 147 mOkayForFocusNotToMatch = false; 148 149 Spannable text = (Spannable) getText(); 150 int oldLength = text.length(); 151 // Normally the delete key's dom events are sent via onTextChanged. 152 // However, if the length is zero, the text did not change, so we 153 // go ahead and pass the key down immediately. 154 if (KeyEvent.KEYCODE_DEL == keyCode && 0 == oldLength) { 155 sendDomEvent(event); 156 return true; 157 } 158 159 if ((mSingle && KeyEvent.KEYCODE_ENTER == keyCode)) { 160 if (isPopupShowing()) { 161 return super.dispatchKeyEvent(event); 162 } 163 if (!down) { 164 // Hide the keyboard, since the user has just submitted this 165 // form. The submission happens thanks to the two calls 166 // to sendDomEvent. 167 InputMethodManager.getInstance(mContext) 168 .hideSoftInputFromWindow(getWindowToken(), 0); 169 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, keyCode)); 170 sendDomEvent(event); 171 } 172 return super.dispatchKeyEvent(event); 173 } else if (KeyEvent.KEYCODE_DPAD_CENTER == keyCode) { 174 // Note that this handles center key and trackball. 175 if (isPopupShowing()) { 176 return super.dispatchKeyEvent(event); 177 } 178 if (!mWebView.nativeCursorMatchesFocus()) { 179 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 180 .onKeyUp(keyCode, event); 181 } 182 // Center key should be passed to a potential onClick 183 if (!down) { 184 mWebView.shortPressOnTextField(); 185 } 186 // Pass to super to handle longpress. 187 return super.dispatchKeyEvent(event); 188 } 189 190 // Ensure there is a layout so arrow keys are handled properly. 191 if (getLayout() == null) { 192 measure(mWidthSpec, mHeightSpec); 193 } 194 int oldStart = Selection.getSelectionStart(text); 195 int oldEnd = Selection.getSelectionEnd(text); 196 197 boolean maxedOut = mMaxLength != -1 && oldLength == mMaxLength; 198 // If we are at max length, and there is a selection rather than a 199 // cursor, we need to store the text to compare later, since the key 200 // may have changed the string. 201 String oldText; 202 if (maxedOut && oldEnd != oldStart) { 203 oldText = text.toString(); 204 } else { 205 oldText = ""; 206 } 207 if (super.dispatchKeyEvent(event)) { 208 // If the WebTextView handled the key it was either an alphanumeric 209 // key, a delete, or a movement within the text. All of those are 210 // ok to pass to javascript. 211 212 // UNLESS there is a max length determined by the html. In that 213 // case, if the string was already at the max length, an 214 // alphanumeric key will be erased by the LengthFilter, 215 // so do not pass down to javascript, and instead 216 // return true. If it is an arrow key or a delete key, we can go 217 // ahead and pass it down. 218 if (KeyEvent.KEYCODE_ENTER == keyCode) { 219 // For multi-line text boxes, newlines will 220 // trigger onTextChanged for key down (which will send both 221 // key up and key down) but not key up. 222 mGotEnterDown = true; 223 } 224 if (maxedOut && !isArrowKey && keyCode != KeyEvent.KEYCODE_DEL) { 225 if (oldEnd == oldStart) { 226 // Return true so the key gets dropped. 227 return true; 228 } else if (!oldText.equals(getText().toString())) { 229 // FIXME: This makes the text work properly, but it 230 // does not pass down the key event, so it may not 231 // work for a textfield that has the type of 232 // behavior of GoogleSuggest. That said, it is 233 // unlikely that a site would combine the two in 234 // one textfield. 235 Spannable span = (Spannable) getText(); 236 int newStart = Selection.getSelectionStart(span); 237 int newEnd = Selection.getSelectionEnd(span); 238 mWebView.replaceTextfieldText(0, oldLength, span.toString(), 239 newStart, newEnd); 240 return true; 241 } 242 } 243 /* FIXME: 244 * In theory, we would like to send the events for the arrow keys. 245 * However, the TextView can arbitrarily change the selection (i.e. 246 * long press followed by using the trackball). Therefore, we keep 247 * in sync with the TextView via onSelectionChanged. If we also 248 * send the DOM event, we lose the correct selection. 249 if (isArrowKey) { 250 // Arrow key does not change the text, but we still want to send 251 // the DOM events. 252 sendDomEvent(event); 253 } 254 */ 255 return true; 256 } 257 // Ignore the key up event for newlines. This prevents 258 // multiple newlines in the native textarea. 259 if (mGotEnterDown && !down) { 260 return true; 261 } 262 // if it is a navigation key, pass it to WebView 263 if (isArrowKey) { 264 // WebView check the trackballtime in onKeyDown to avoid calling 265 // native from both trackball and key handling. As this is called 266 // from WebTextView, we always want WebView to check with native. 267 // Reset trackballtime to ensure it. 268 mWebView.resetTrackballTime(); 269 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 270 .onKeyUp(keyCode, event); 271 } 272 return false; 273 } 274 275 /** 276 * Create a fake touch up event at (x,y) with respect to this WebTextView. 277 * This is used by WebView to act as though a touch event which happened 278 * before we placed the WebTextView actually hit it, so that it can place 279 * the cursor accordingly. 280 */ 281 /* package */ void fakeTouchEvent(float x, float y) { 282 // We need to ensure that there is a Layout, since the Layout is used 283 // in determining where to place the cursor. 284 if (getLayout() == null) { 285 measure(mWidthSpec, mHeightSpec); 286 } 287 // Create a fake touch up, which is used to place the cursor. 288 MotionEvent ev = MotionEvent.obtain(0, 0, MotionEvent.ACTION_UP, 289 x, y, 0); 290 onTouchEvent(ev); 291 ev.recycle(); 292 } 293 294 /** 295 * Determine whether this WebTextView currently represents the node 296 * represented by ptr. 297 * @param ptr Pointer to a node to compare to. 298 * @return boolean Whether this WebTextView already represents the node 299 * pointed to by ptr. 300 */ 301 /* package */ boolean isSameTextField(int ptr) { 302 return ptr == mNodePointer; 303 } 304 305 @Override public InputConnection onCreateInputConnection( 306 EditorInfo outAttrs) { 307 InputConnection connection = super.onCreateInputConnection(outAttrs); 308 if (mWebView != null) { 309 // Use the name of the textfield + the url. Use backslash as an 310 // arbitrary separator. 311 outAttrs.fieldName = mWebView.nativeFocusCandidateName() + "\\" 312 + mWebView.getUrl(); 313 } 314 return connection; 315 } 316 317 @Override 318 public void onEditorAction(int actionCode) { 319 switch (actionCode) { 320 case EditorInfo.IME_ACTION_NEXT: 321 mWebView.nativeMoveCursorToNextTextInput(); 322 // Preemptively rebuild the WebTextView, so that the action will 323 // be set properly. 324 mWebView.rebuildWebTextView(); 325 // Since the cursor will no longer be in the same place as the 326 // focus, set the focus controller back to inactive 327 mWebView.setFocusControllerInactive(); 328 mOkayForFocusNotToMatch = true; 329 break; 330 case EditorInfo.IME_ACTION_DONE: 331 super.onEditorAction(actionCode); 332 break; 333 case EditorInfo.IME_ACTION_GO: 334 // Send an enter and hide the soft keyboard 335 InputMethodManager.getInstance(mContext) 336 .hideSoftInputFromWindow(getWindowToken(), 0); 337 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 338 KeyEvent.KEYCODE_ENTER)); 339 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 340 KeyEvent.KEYCODE_ENTER)); 341 342 default: 343 break; 344 } 345 } 346 347 @Override 348 protected void onSelectionChanged(int selStart, int selEnd) { 349 if (!mFromWebKit && mWebView != null) { 350 if (DebugFlags.WEB_TEXT_VIEW) { 351 Log.v(LOGTAG, "onSelectionChanged selStart=" + selStart 352 + " selEnd=" + selEnd); 353 } 354 mWebView.setSelection(selStart, selEnd); 355 } 356 } 357 358 @Override 359 protected void onTextChanged(CharSequence s,int start,int before,int count){ 360 super.onTextChanged(s, start, before, count); 361 String postChange = s.toString(); 362 // Prevent calls to setText from invoking onTextChanged (since this will 363 // mean we are on a different textfield). Also prevent the change when 364 // going from a textfield with a string of text to one with a smaller 365 // limit on text length from registering the onTextChanged event. 366 if (mPreChange == null || mPreChange.equals(postChange) || 367 (mMaxLength > -1 && mPreChange.length() > mMaxLength && 368 mPreChange.substring(0, mMaxLength).equals(postChange))) { 369 return; 370 } 371 mPreChange = postChange; 372 // This was simply a delete or a cut, so just delete the selection. 373 if (before > 0 && 0 == count) { 374 mWebView.deleteSelection(start, start + before); 375 // For this and all changes to the text, update our cache 376 updateCachedTextfield(); 377 return; 378 } 379 // Find the last character being replaced. If it can be represented by 380 // events, we will pass them to native (after replacing the beginning 381 // of the changed text), so we can see javascript events. 382 // Otherwise, replace the text being changed (including the last 383 // character) in the textfield. 384 TextUtils.getChars(s, start + count - 1, start + count, mCharacter, 0); 385 KeyCharacterMap kmap = 386 KeyCharacterMap.load(KeyCharacterMap.BUILT_IN_KEYBOARD); 387 KeyEvent[] events = kmap.getEvents(mCharacter); 388 boolean cannotUseKeyEvents = null == events; 389 int charactersFromKeyEvents = cannotUseKeyEvents ? 0 : 1; 390 if (count > 1 || cannotUseKeyEvents) { 391 String replace = s.subSequence(start, 392 start + count - charactersFromKeyEvents).toString(); 393 mWebView.replaceTextfieldText(start, start + before, replace, 394 start + count - charactersFromKeyEvents, 395 start + count - charactersFromKeyEvents); 396 } else { 397 // This corrects the selection which may have been affected by the 398 // trackball or auto-correct. 399 if (DebugFlags.WEB_TEXT_VIEW) { 400 Log.v(LOGTAG, "onTextChanged start=" + start 401 + " start + before=" + (start + before)); 402 } 403 mWebView.setSelection(start, start + before); 404 } 405 if (!cannotUseKeyEvents) { 406 int length = events.length; 407 for (int i = 0; i < length; i++) { 408 // We never send modifier keys to native code so don't send them 409 // here either. 410 if (!KeyEvent.isModifierKey(events[i].getKeyCode())) { 411 sendDomEvent(events[i]); 412 } 413 } 414 } 415 updateCachedTextfield(); 416 } 417 418 @Override 419 public boolean onTouchEvent(MotionEvent event) { 420 switch (event.getAction()) { 421 case MotionEvent.ACTION_DOWN: 422 super.onTouchEvent(event); 423 // This event may be the start of a drag, so store it to pass to the 424 // WebView if it is. 425 mDragStartX = event.getX(); 426 mDragStartY = event.getY(); 427 mDragStartTime = event.getEventTime(); 428 mDragSent = false; 429 mScrolled = false; 430 mGotTouchDown = true; 431 break; 432 case MotionEvent.ACTION_MOVE: 433 Spannable buffer = getText(); 434 int initialScrollX = Touch.getInitialScrollX(this, buffer); 435 int initialScrollY = Touch.getInitialScrollY(this, buffer); 436 super.onTouchEvent(event); 437 if (mScrollX != initialScrollX 438 || mScrollY != initialScrollY) { 439 if (mWebView != null) { 440 mWebView.scrollFocusedTextInput(mScrollX, mScrollY); 441 } 442 mScrolled = true; 443 return true; 444 } 445 if (mWebView != null) { 446 // Only want to set the initial state once. 447 if (!mDragSent) { 448 mWebView.initiateTextFieldDrag(mDragStartX, mDragStartY, 449 mDragStartTime); 450 mDragSent = true; 451 } 452 boolean scrolled = mWebView.textFieldDrag(event); 453 if (scrolled) { 454 mScrolled = true; 455 cancelLongPress(); 456 return true; 457 } 458 } 459 return false; 460 case MotionEvent.ACTION_UP: 461 case MotionEvent.ACTION_CANCEL: 462 if (!mScrolled) { 463 // If the page scrolled, or the TextView scrolled, we do not 464 // want to change the selection 465 cancelLongPress(); 466 if (mGotTouchDown && mWebView != null) { 467 mWebView.touchUpOnTextField(event); 468 } 469 } 470 // Necessary for the WebView to reset its state 471 if (mWebView != null && mDragSent) { 472 mWebView.onTouchEvent(event); 473 } 474 mGotTouchDown = false; 475 break; 476 default: 477 break; 478 } 479 return true; 480 } 481 482 @Override 483 public boolean onTrackballEvent(MotionEvent event) { 484 if (isPopupShowing()) { 485 return super.onTrackballEvent(event); 486 } 487 if (event.getAction() != MotionEvent.ACTION_MOVE) { 488 return false; 489 } 490 // If the Cursor is not on the text input, webview should handle the 491 // trackball 492 if (!mWebView.nativeCursorMatchesFocus()) { 493 return mWebView.onTrackballEvent(event); 494 } 495 Spannable text = (Spannable) getText(); 496 MovementMethod move = getMovementMethod(); 497 if (move != null && getLayout() != null && 498 move.onTrackballEvent(this, text, event)) { 499 // Selection is changed in onSelectionChanged 500 return true; 501 } 502 return false; 503 } 504 505 /** 506 * Remove this WebTextView from its host WebView, and return 507 * focus to the host. 508 */ 509 /* package */ void remove() { 510 // hide the soft keyboard when the edit text is out of focus 511 InputMethodManager.getInstance(mContext).hideSoftInputFromWindow( 512 getWindowToken(), 0); 513 mWebView.removeView(this); 514 mWebView.requestFocus(); 515 } 516 517 /* package */ void bringIntoView() { 518 if (getLayout() != null) { 519 bringPointIntoView(Selection.getSelectionEnd(getText())); 520 } 521 } 522 523 /** 524 * Send the DOM events for the specified event. 525 * @param event KeyEvent to be translated into a DOM event. 526 */ 527 private void sendDomEvent(KeyEvent event) { 528 mWebView.passToJavaScript(getText().toString(), event); 529 } 530 531 /** 532 * Always use this instead of setAdapter, as this has features specific to 533 * the WebTextView. 534 */ 535 public void setAdapterCustom(AutoCompleteAdapter adapter) { 536 if (adapter != null) { 537 setInputType(EditorInfo.TYPE_TEXT_FLAG_AUTO_COMPLETE); 538 adapter.setTextView(this); 539 } 540 super.setAdapter(adapter); 541 } 542 543 /** 544 * This is a special version of ArrayAdapter which changes its text size 545 * to match the text size of its host TextView. 546 */ 547 public static class AutoCompleteAdapter extends ArrayAdapter<String> { 548 private TextView mTextView; 549 550 public AutoCompleteAdapter(Context context, ArrayList<String> entries) { 551 super(context, com.android.internal.R.layout 552 .search_dropdown_item_1line, entries); 553 } 554 555 /** 556 * {@inheritDoc} 557 */ 558 public View getView(int position, View convertView, ViewGroup parent) { 559 TextView tv = 560 (TextView) super.getView(position, convertView, parent); 561 if (tv != null && mTextView != null) { 562 tv.setTextSize(mTextView.getTextSize()); 563 } 564 return tv; 565 } 566 567 /** 568 * Set the TextView so we can match its text size. 569 */ 570 private void setTextView(TextView tv) { 571 mTextView = tv; 572 } 573 } 574 575 /** 576 * Determine whether to use the system-wide password disguising method, 577 * or to use none. 578 * @param inPassword True if the textfield is a password field. 579 */ 580 /* package */ void setInPassword(boolean inPassword) { 581 if (inPassword) { 582 setInputType(EditorInfo.TYPE_CLASS_TEXT | EditorInfo. 583 TYPE_TEXT_VARIATION_PASSWORD); 584 createBackground(); 585 } 586 // For password fields, draw the WebTextView. For others, just show 587 // webkit's drawing. 588 setWillNotDraw(!inPassword); 589 setBackgroundDrawable(inPassword ? mBackground : null); 590 // For non-password fields, avoid the invals from TextView's blinking 591 // cursor 592 setCursorVisible(inPassword); 593 } 594 595 /** 596 * Private class used for the background of a password textfield. 597 */ 598 private static class OutlineDrawable extends Drawable { 599 public void draw(Canvas canvas) { 600 Rect bounds = getBounds(); 601 Paint paint = new Paint(); 602 paint.setAntiAlias(true); 603 // Draw the background. 604 paint.setColor(Color.WHITE); 605 canvas.drawRect(bounds, paint); 606 // Draw the outline. 607 paint.setStyle(Paint.Style.STROKE); 608 paint.setColor(Color.BLACK); 609 canvas.drawRect(bounds, paint); 610 } 611 // Always want it to be opaque. 612 public int getOpacity() { 613 return PixelFormat.OPAQUE; 614 } 615 // These are needed because they are abstract in Drawable. 616 public void setAlpha(int alpha) { } 617 public void setColorFilter(ColorFilter cf) { } 618 } 619 620 /** 621 * Create a background for the WebTextView and set up the paint for drawing 622 * the text. This way, we can see the password transformation of the 623 * system, which (optionally) shows the actual text before changing to dots. 624 * The background is necessary to hide the webkit-drawn text beneath. 625 */ 626 private void createBackground() { 627 if (mBackground != null) { 628 return; 629 } 630 mBackground = new OutlineDrawable(); 631 632 setGravity(Gravity.CENTER_VERTICAL); 633 // Turn on subpixel text, and turn off kerning, so it better matches 634 // the text in webkit. 635 TextPaint paint = getPaint(); 636 int flags = paint.getFlags() | Paint.SUBPIXEL_TEXT_FLAG | 637 Paint.ANTI_ALIAS_FLAG & ~Paint.DEV_KERN_TEXT_FLAG; 638 paint.setFlags(flags); 639 // Set the text color to black, regardless of the theme. This ensures 640 // that other applications that use embedded WebViews will properly 641 // display the text in password textfields. 642 setTextColor(Color.BLACK); 643 } 644 645 /* package */ void setMaxLength(int maxLength) { 646 mMaxLength = maxLength; 647 if (-1 == maxLength) { 648 setFilters(NO_FILTERS); 649 } else { 650 setFilters(new InputFilter[] { 651 new InputFilter.LengthFilter(maxLength) }); 652 } 653 } 654 655 /** 656 * Set the pointer for this node so it can be determined which node this 657 * WebTextView represents. 658 * @param ptr Integer representing the pointer to the node which this 659 * WebTextView represents. 660 */ 661 /* package */ void setNodePointer(int ptr) { 662 mNodePointer = ptr; 663 } 664 665 /** 666 * Determine the position and size of WebTextView, and add it to the 667 * WebView's view heirarchy. All parameters are presumed to be in 668 * view coordinates. Also requests Focus and sets the cursor to not 669 * request to be in view. 670 * @param x x-position of the textfield. 671 * @param y y-position of the textfield. 672 * @param width width of the textfield. 673 * @param height height of the textfield. 674 */ 675 /* package */ void setRect(int x, int y, int width, int height) { 676 LayoutParams lp = (LayoutParams) getLayoutParams(); 677 if (null == lp) { 678 lp = new LayoutParams(width, height, x, y); 679 } else { 680 lp.x = x; 681 lp.y = y; 682 lp.width = width; 683 lp.height = height; 684 } 685 if (getParent() == null) { 686 mWebView.addView(this, lp); 687 } else { 688 setLayoutParams(lp); 689 } 690 // Set up a measure spec so a layout can always be recreated. 691 mWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY); 692 mHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY); 693 requestFocus(); 694 } 695 696 /** 697 * Set the selection, and disable our onSelectionChanged action. 698 */ 699 /* package */ void setSelectionFromWebKit(int start, int end) { 700 if (start < 0 || end < 0) return; 701 Spannable text = (Spannable) getText(); 702 int length = text.length(); 703 if (start > length || end > length) return; 704 mFromWebKit = true; 705 Selection.setSelection(text, start, end); 706 mFromWebKit = false; 707 } 708 709 /** 710 * Set whether this is a single-line textfield or a multi-line textarea. 711 * Textfields scroll horizontally, and do not handle the enter key. 712 * Textareas behave oppositely. 713 * Do NOT call this after calling setInPassword(true). This will result in 714 * removing the password input type. 715 */ 716 public void setSingleLine(boolean single) { 717 int inputType = EditorInfo.TYPE_CLASS_TEXT 718 | EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT; 719 if (single) { 720 int action = mWebView.nativeTextFieldAction(); 721 switch (action) { 722 // Keep in sync with CachedRoot::ImeAction 723 case 0: // NEXT 724 setImeOptions(EditorInfo.IME_ACTION_NEXT); 725 break; 726 case 1: // GO 727 setImeOptions(EditorInfo.IME_ACTION_GO); 728 break; 729 case -1: // FAILURE 730 case 2: // DONE 731 setImeOptions(EditorInfo.IME_ACTION_DONE); 732 break; 733 } 734 } else { 735 inputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE 736 | EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES 737 | EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT; 738 setImeOptions(EditorInfo.IME_ACTION_NONE); 739 } 740 mSingle = single; 741 setHorizontallyScrolling(single); 742 setInputType(inputType); 743 } 744 745 /** 746 * Set the text for this WebTextView, and set the selection to (start, end) 747 * @param text Text to go into this WebTextView. 748 * @param start Beginning of the selection. 749 * @param end End of the selection. 750 */ 751 /* package */ void setText(CharSequence text, int start, int end) { 752 mPreChange = text.toString(); 753 setText(text); 754 Spannable span = (Spannable) getText(); 755 int length = span.length(); 756 if (end > length) { 757 end = length; 758 } 759 if (start < 0) { 760 start = 0; 761 } else if (start > length) { 762 start = length; 763 } 764 if (DebugFlags.WEB_TEXT_VIEW) { 765 Log.v(LOGTAG, "setText start=" + start 766 + " end=" + end); 767 } 768 Selection.setSelection(span, start, end); 769 } 770 771 /** 772 * Set the text to the new string, but use the old selection, making sure 773 * to keep it within the new string. 774 * @param text The new text to place in the textfield. 775 */ 776 /* package */ void setTextAndKeepSelection(String text) { 777 mPreChange = text.toString(); 778 Editable edit = (Editable) getText(); 779 edit.replace(0, edit.length(), text); 780 updateCachedTextfield(); 781 } 782 783 /** 784 * Update the cache to reflect the current text. 785 */ 786 /* package */ void updateCachedTextfield() { 787 mWebView.updateCachedTextfield(getText().toString()); 788 } 789} 790