WebTextView.java revision eaa18dec91b6dd0ce3191a9ab65cdc95ef68b935
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.Drawable; 29import android.text.Editable; 30import android.text.InputFilter; 31import android.text.Selection; 32import android.text.Spannable; 33import android.text.TextPaint; 34import android.text.TextUtils; 35import android.text.method.MovementMethod; 36import android.text.method.Touch; 37import android.util.Log; 38import android.view.Gravity; 39import android.view.KeyCharacterMap; 40import android.view.KeyEvent; 41import android.view.MotionEvent; 42import android.view.View; 43import android.view.ViewConfiguration; 44import android.view.ViewGroup; 45import android.view.inputmethod.EditorInfo; 46import android.view.inputmethod.InputMethodManager; 47import android.view.inputmethod.InputConnection; 48import android.widget.AbsoluteLayout.LayoutParams; 49import android.widget.ArrayAdapter; 50import android.widget.AutoCompleteTextView; 51import android.widget.TextView; 52 53import java.util.ArrayList; 54 55/** 56 * WebTextView is a specialized version of EditText used by WebView 57 * to overlay html textfields (and textareas) to use our standard 58 * text editing. 59 */ 60/* package */ class WebTextView extends AutoCompleteTextView { 61 62 static final String LOGTAG = "webtextview"; 63 64 private WebView mWebView; 65 private boolean mSingle; 66 private int mWidthSpec; 67 private int mHeightSpec; 68 private int mNodePointer; 69 // FIXME: This is a hack for blocking unmatched key ups, in particular 70 // on the enter key. The method for blocking unmatched key ups prevents 71 // the shift key from working properly. 72 private boolean mGotEnterDown; 73 private int mMaxLength; 74 // Keep track of the text before the change so we know whether we actually 75 // need to send down the DOM events. 76 private String mPreChange; 77 private Drawable mBackground; 78 // Variables for keeping track of the touch down, to send to the WebView 79 // when a drag starts 80 private float mDragStartX; 81 private float mDragStartY; 82 private long mDragStartTime; 83 private boolean mDragSent; 84 // True if the most recent drag event has caused either the TextView to 85 // scroll or the web page to scroll. Gets reset after a touch down. 86 private boolean mScrolled; 87 // Gets set to true when the the IME jumps to the next textfield. When this 88 // happens, the next time the user hits a key it is okay for the focus 89 // pointer to not match the WebTextView's node pointer 90 private boolean mOkayForFocusNotToMatch; 91 // Whether or not a selection change was generated from webkit. If it was, 92 // we do not need to pass the selection back to webkit. 93 private boolean mFromWebKit; 94 private boolean mGotTouchDown; 95 // Array to store the final character added in onTextChanged, so that its 96 // KeyEvents may be determined. 97 private char[] mCharacter = new char[1]; 98 // This is used to reset the length filter when on a textfield 99 // with no max length. 100 // FIXME: This can be replaced with TextView.NO_FILTERS if that 101 // is made public/protected. 102 private static final InputFilter[] NO_FILTERS = new InputFilter[0]; 103 104 /** 105 * Create a new WebTextView. 106 * @param context The Context for this WebTextView. 107 * @param webView The WebView that created this. 108 */ 109 /* package */ WebTextView(Context context, WebView webView) { 110 super(context); 111 mWebView = webView; 112 mMaxLength = -1; 113 } 114 115 @Override 116 public boolean dispatchKeyEvent(KeyEvent event) { 117 if (event.isSystem()) { 118 return super.dispatchKeyEvent(event); 119 } 120 // Treat ACTION_DOWN and ACTION MULTIPLE the same 121 boolean down = event.getAction() != KeyEvent.ACTION_UP; 122 int keyCode = event.getKeyCode(); 123 124 boolean isArrowKey = false; 125 switch(keyCode) { 126 case KeyEvent.KEYCODE_DPAD_LEFT: 127 case KeyEvent.KEYCODE_DPAD_RIGHT: 128 case KeyEvent.KEYCODE_DPAD_UP: 129 case KeyEvent.KEYCODE_DPAD_DOWN: 130 if (!mWebView.nativeCursorMatchesFocus()) { 131 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 132 .onKeyUp(keyCode, event); 133 134 } 135 isArrowKey = true; 136 break; 137 } 138 if (!isArrowKey && !mOkayForFocusNotToMatch 139 && mWebView.nativeFocusNodePointer() != mNodePointer) { 140 mWebView.nativeClearCursor(); 141 // Do not call remove() here, which hides the soft keyboard. If 142 // the soft keyboard is being displayed, the user will still want 143 // it there. 144 mWebView.removeView(this); 145 mWebView.requestFocus(); 146 return mWebView.dispatchKeyEvent(event); 147 } 148 // After a jump to next textfield and the first key press, the cursor 149 // and focus will once again match, so reset this value. 150 mOkayForFocusNotToMatch = false; 151 152 Spannable text = (Spannable) getText(); 153 int oldLength = text.length(); 154 // Normally the delete key's dom events are sent via onTextChanged. 155 // However, if the length is zero, the text did not change, so we 156 // go ahead and pass the key down immediately. 157 if (KeyEvent.KEYCODE_DEL == keyCode && 0 == oldLength) { 158 sendDomEvent(event); 159 return true; 160 } 161 162 if ((mSingle && KeyEvent.KEYCODE_ENTER == keyCode)) { 163 if (isPopupShowing()) { 164 return super.dispatchKeyEvent(event); 165 } 166 if (!down) { 167 // Hide the keyboard, since the user has just submitted this 168 // form. The submission happens thanks to the two calls 169 // to sendDomEvent. 170 InputMethodManager.getInstance(mContext) 171 .hideSoftInputFromWindow(getWindowToken(), 0); 172 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, keyCode)); 173 sendDomEvent(event); 174 } 175 return super.dispatchKeyEvent(event); 176 } else if (KeyEvent.KEYCODE_DPAD_CENTER == keyCode) { 177 // Note that this handles center key and trackball. 178 if (isPopupShowing()) { 179 return super.dispatchKeyEvent(event); 180 } 181 if (!mWebView.nativeCursorMatchesFocus()) { 182 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 183 .onKeyUp(keyCode, event); 184 } 185 // Center key should be passed to a potential onClick 186 if (!down) { 187 mWebView.shortPressOnTextField(); 188 } 189 // Pass to super to handle longpress. 190 return super.dispatchKeyEvent(event); 191 } 192 193 // Ensure there is a layout so arrow keys are handled properly. 194 if (getLayout() == null) { 195 measure(mWidthSpec, mHeightSpec); 196 } 197 int oldStart = Selection.getSelectionStart(text); 198 int oldEnd = Selection.getSelectionEnd(text); 199 200 boolean maxedOut = mMaxLength != -1 && oldLength == mMaxLength; 201 // If we are at max length, and there is a selection rather than a 202 // cursor, we need to store the text to compare later, since the key 203 // may have changed the string. 204 String oldText; 205 if (maxedOut && oldEnd != oldStart) { 206 oldText = text.toString(); 207 } else { 208 oldText = ""; 209 } 210 if (super.dispatchKeyEvent(event)) { 211 // If the WebTextView handled the key it was either an alphanumeric 212 // key, a delete, or a movement within the text. All of those are 213 // ok to pass to javascript. 214 215 // UNLESS there is a max length determined by the html. In that 216 // case, if the string was already at the max length, an 217 // alphanumeric key will be erased by the LengthFilter, 218 // so do not pass down to javascript, and instead 219 // return true. If it is an arrow key or a delete key, we can go 220 // ahead and pass it down. 221 if (KeyEvent.KEYCODE_ENTER == keyCode) { 222 // For multi-line text boxes, newlines will 223 // trigger onTextChanged for key down (which will send both 224 // key up and key down) but not key up. 225 mGotEnterDown = true; 226 } 227 if (maxedOut && !isArrowKey && keyCode != KeyEvent.KEYCODE_DEL) { 228 if (oldEnd == oldStart) { 229 // Return true so the key gets dropped. 230 return true; 231 } else if (!oldText.equals(getText().toString())) { 232 // FIXME: This makes the text work properly, but it 233 // does not pass down the key event, so it may not 234 // work for a textfield that has the type of 235 // behavior of GoogleSuggest. That said, it is 236 // unlikely that a site would combine the two in 237 // one textfield. 238 Spannable span = (Spannable) getText(); 239 int newStart = Selection.getSelectionStart(span); 240 int newEnd = Selection.getSelectionEnd(span); 241 mWebView.replaceTextfieldText(0, oldLength, span.toString(), 242 newStart, newEnd); 243 return true; 244 } 245 } 246 /* FIXME: 247 * In theory, we would like to send the events for the arrow keys. 248 * However, the TextView can arbitrarily change the selection (i.e. 249 * long press followed by using the trackball). Therefore, we keep 250 * in sync with the TextView via onSelectionChanged. If we also 251 * send the DOM event, we lose the correct selection. 252 if (isArrowKey) { 253 // Arrow key does not change the text, but we still want to send 254 // the DOM events. 255 sendDomEvent(event); 256 } 257 */ 258 return true; 259 } 260 // Ignore the key up event for newlines. This prevents 261 // multiple newlines in the native textarea. 262 if (mGotEnterDown && !down) { 263 return true; 264 } 265 // if it is a navigation key, pass it to WebView 266 if (isArrowKey) { 267 // WebView check the trackballtime in onKeyDown to avoid calling 268 // native from both trackball and key handling. As this is called 269 // from WebTextView, we always want WebView to check with native. 270 // Reset trackballtime to ensure it. 271 mWebView.resetTrackballTime(); 272 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 273 .onKeyUp(keyCode, event); 274 } 275 return false; 276 } 277 278 /** 279 * Determine whether this WebTextView currently represents the node 280 * represented by ptr. 281 * @param ptr Pointer to a node to compare to. 282 * @return boolean Whether this WebTextView already represents the node 283 * pointed to by ptr. 284 */ 285 /* package */ boolean isSameTextField(int ptr) { 286 return ptr == mNodePointer; 287 } 288 289 @Override public InputConnection onCreateInputConnection( 290 EditorInfo outAttrs) { 291 InputConnection connection = super.onCreateInputConnection(outAttrs); 292 if (mWebView != null) { 293 // Use the name of the textfield + the url. Use backslash as an 294 // arbitrary separator. 295 outAttrs.fieldName = mWebView.nativeFocusCandidateName() + "\\" 296 + mWebView.getUrl(); 297 } 298 return connection; 299 } 300 301 @Override 302 public void onEditorAction(int actionCode) { 303 switch (actionCode) { 304 case EditorInfo.IME_ACTION_NEXT: 305 mWebView.nativeMoveCursorToNextTextInput(); 306 // Preemptively rebuild the WebTextView, so that the action will 307 // be set properly. 308 mWebView.rebuildWebTextView(); 309 // Since the cursor will no longer be in the same place as the 310 // focus, set the focus controller back to inactive 311 mWebView.setFocusControllerInactive(); 312 mWebView.invalidate(); 313 mOkayForFocusNotToMatch = true; 314 break; 315 case EditorInfo.IME_ACTION_DONE: 316 super.onEditorAction(actionCode); 317 break; 318 case EditorInfo.IME_ACTION_GO: 319 // Send an enter and hide the soft keyboard 320 InputMethodManager.getInstance(mContext) 321 .hideSoftInputFromWindow(getWindowToken(), 0); 322 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 323 KeyEvent.KEYCODE_ENTER)); 324 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 325 KeyEvent.KEYCODE_ENTER)); 326 327 default: 328 break; 329 } 330 } 331 332 @Override 333 protected void onSelectionChanged(int selStart, int selEnd) { 334 // This code is copied from TextView.onDraw(). That code does not get 335 // executed, however, because the WebTextView does not draw, allowing 336 // webkit's drawing to show through. 337 InputMethodManager imm = InputMethodManager.peekInstance(); 338 if (imm != null && imm.isActive(this)) { 339 Spannable sp = (Spannable) getText(); 340 int candStart = EditableInputConnection.getComposingSpanStart(sp); 341 int candEnd = EditableInputConnection.getComposingSpanEnd(sp); 342 imm.updateSelection(this, selStart, selEnd, candStart, candEnd); 343 } 344 if (!mFromWebKit && mWebView != null) { 345 if (DebugFlags.WEB_TEXT_VIEW) { 346 Log.v(LOGTAG, "onSelectionChanged selStart=" + selStart 347 + " selEnd=" + selEnd); 348 } 349 mWebView.setSelection(selStart, selEnd); 350 } 351 } 352 353 @Override 354 protected void onTextChanged(CharSequence s,int start,int before,int count){ 355 super.onTextChanged(s, start, before, count); 356 String postChange = s.toString(); 357 // Prevent calls to setText from invoking onTextChanged (since this will 358 // mean we are on a different textfield). Also prevent the change when 359 // going from a textfield with a string of text to one with a smaller 360 // limit on text length from registering the onTextChanged event. 361 if (mPreChange == null || mPreChange.equals(postChange) || 362 (mMaxLength > -1 && mPreChange.length() > mMaxLength && 363 mPreChange.substring(0, mMaxLength).equals(postChange))) { 364 return; 365 } 366 mPreChange = postChange; 367 // This was simply a delete or a cut, so just delete the selection. 368 if (before > 0 && 0 == count) { 369 mWebView.deleteSelection(start, start + before); 370 // For this and all changes to the text, update our cache 371 updateCachedTextfield(); 372 return; 373 } 374 // Find the last character being replaced. If it can be represented by 375 // events, we will pass them to native (after replacing the beginning 376 // of the changed text), so we can see javascript events. 377 // Otherwise, replace the text being changed (including the last 378 // character) in the textfield. 379 TextUtils.getChars(s, start + count - 1, start + count, mCharacter, 0); 380 KeyCharacterMap kmap = 381 KeyCharacterMap.load(KeyCharacterMap.BUILT_IN_KEYBOARD); 382 KeyEvent[] events = kmap.getEvents(mCharacter); 383 boolean cannotUseKeyEvents = null == events; 384 int charactersFromKeyEvents = cannotUseKeyEvents ? 0 : 1; 385 if (count > 1 || cannotUseKeyEvents) { 386 String replace = s.subSequence(start, 387 start + count - charactersFromKeyEvents).toString(); 388 mWebView.replaceTextfieldText(start, start + before, replace, 389 start + count - charactersFromKeyEvents, 390 start + count - charactersFromKeyEvents); 391 } else { 392 // This corrects the selection which may have been affected by the 393 // trackball or auto-correct. 394 if (DebugFlags.WEB_TEXT_VIEW) { 395 Log.v(LOGTAG, "onTextChanged start=" + start 396 + " start + before=" + (start + before)); 397 } 398 mWebView.setSelection(start, start + before); 399 } 400 if (!cannotUseKeyEvents) { 401 int length = events.length; 402 for (int i = 0; i < length; i++) { 403 // We never send modifier keys to native code so don't send them 404 // here either. 405 if (!KeyEvent.isModifierKey(events[i].getKeyCode())) { 406 sendDomEvent(events[i]); 407 } 408 } 409 } 410 updateCachedTextfield(); 411 } 412 413 @Override 414 public boolean onTouchEvent(MotionEvent event) { 415 switch (event.getAction()) { 416 case MotionEvent.ACTION_DOWN: 417 super.onTouchEvent(event); 418 // This event may be the start of a drag, so store it to pass to the 419 // WebView if it is. 420 mDragStartX = event.getX(); 421 mDragStartY = event.getY(); 422 mDragStartTime = event.getEventTime(); 423 mDragSent = false; 424 mScrolled = false; 425 mGotTouchDown = true; 426 break; 427 case MotionEvent.ACTION_MOVE: 428 int slop = ViewConfiguration.get(mContext).getScaledTouchSlop(); 429 Spannable buffer = getText(); 430 int initialScrollX = Touch.getInitialScrollX(this, buffer); 431 int initialScrollY = Touch.getInitialScrollY(this, buffer); 432 super.onTouchEvent(event); 433 int dx = Math.abs(mScrollX - initialScrollX); 434 int dy = Math.abs(mScrollY - initialScrollY); 435 // Use a smaller slop when checking to see if we've moved far enough 436 // to scroll the text, because experimentally, slop has shown to be 437 // to big for the case of a small textfield. 438 int smallerSlop = slop/2; 439 if (dx > smallerSlop || dy > smallerSlop) { 440 if (mWebView != null) { 441 float maxScrollX = (float) Touch.getMaxScrollX(this, 442 getLayout(), mScrollY); 443 if (DebugFlags.WEB_TEXT_VIEW) { 444 Log.v(LOGTAG, "onTouchEvent x=" + mScrollX + " y=" 445 + mScrollY + " maxX=" + maxScrollX); 446 } 447 mWebView.scrollFocusedTextInput(maxScrollX > 0 ? 448 mScrollX / maxScrollX : 0, mScrollY); 449 } 450 mScrolled = true; 451 return true; 452 } 453 if (Math.abs((int) event.getX() - mDragStartX) < slop 454 && Math.abs((int) event.getY() - mDragStartY) < slop) { 455 // If the user has not scrolled further than slop, we should not 456 // send the drag. Instead, do nothing, and when the user lifts 457 // their finger, we will change the selection. 458 return true; 459 } 460 if (mWebView != null) { 461 // Only want to set the initial state once. 462 if (!mDragSent) { 463 mWebView.initiateTextFieldDrag(mDragStartX, mDragStartY, 464 mDragStartTime); 465 mDragSent = true; 466 } 467 boolean scrolled = mWebView.textFieldDrag(event); 468 if (scrolled) { 469 mScrolled = true; 470 cancelLongPress(); 471 return true; 472 } 473 } 474 return false; 475 case MotionEvent.ACTION_UP: 476 case MotionEvent.ACTION_CANCEL: 477 if (!mScrolled) { 478 // If the page scrolled, or the TextView scrolled, we do not 479 // want to change the selection 480 cancelLongPress(); 481 if (mGotTouchDown && mWebView != null) { 482 mWebView.touchUpOnTextField(event); 483 } 484 } 485 // Necessary for the WebView to reset its state 486 if (mWebView != null && mDragSent) { 487 mWebView.onTouchEvent(event); 488 } 489 mGotTouchDown = false; 490 break; 491 default: 492 break; 493 } 494 return true; 495 } 496 497 @Override 498 public boolean onTrackballEvent(MotionEvent event) { 499 if (isPopupShowing()) { 500 return super.onTrackballEvent(event); 501 } 502 if (event.getAction() != MotionEvent.ACTION_MOVE) { 503 return false; 504 } 505 // If the Cursor is not on the text input, webview should handle the 506 // trackball 507 if (!mWebView.nativeCursorMatchesFocus()) { 508 return mWebView.onTrackballEvent(event); 509 } 510 Spannable text = (Spannable) getText(); 511 MovementMethod move = getMovementMethod(); 512 if (move != null && getLayout() != null && 513 move.onTrackballEvent(this, text, event)) { 514 // Selection is changed in onSelectionChanged 515 return true; 516 } 517 return false; 518 } 519 520 /** 521 * Remove this WebTextView from its host WebView, and return 522 * focus to the host. 523 */ 524 /* package */ void remove() { 525 // hide the soft keyboard when the edit text is out of focus 526 InputMethodManager.getInstance(mContext).hideSoftInputFromWindow( 527 getWindowToken(), 0); 528 mWebView.removeView(this); 529 mWebView.requestFocus(); 530 } 531 532 /* package */ void bringIntoView() { 533 if (getLayout() != null) { 534 bringPointIntoView(Selection.getSelectionEnd(getText())); 535 } 536 } 537 538 /** 539 * Send the DOM events for the specified event. 540 * @param event KeyEvent to be translated into a DOM event. 541 */ 542 private void sendDomEvent(KeyEvent event) { 543 mWebView.passToJavaScript(getText().toString(), event); 544 } 545 546 /** 547 * Always use this instead of setAdapter, as this has features specific to 548 * the WebTextView. 549 */ 550 public void setAdapterCustom(AutoCompleteAdapter adapter) { 551 if (adapter != null) { 552 setInputType(EditorInfo.TYPE_TEXT_FLAG_AUTO_COMPLETE); 553 adapter.setTextView(this); 554 } 555 super.setAdapter(adapter); 556 } 557 558 /** 559 * This is a special version of ArrayAdapter which changes its text size 560 * to match the text size of its host TextView. 561 */ 562 public static class AutoCompleteAdapter extends ArrayAdapter<String> { 563 private TextView mTextView; 564 565 public AutoCompleteAdapter(Context context, ArrayList<String> entries) { 566 super(context, com.android.internal.R.layout 567 .search_dropdown_item_1line, entries); 568 } 569 570 /** 571 * {@inheritDoc} 572 */ 573 public View getView(int position, View convertView, ViewGroup parent) { 574 TextView tv = 575 (TextView) super.getView(position, convertView, parent); 576 if (tv != null && mTextView != null) { 577 tv.setTextSize(mTextView.getTextSize()); 578 } 579 return tv; 580 } 581 582 /** 583 * Set the TextView so we can match its text size. 584 */ 585 private void setTextView(TextView tv) { 586 mTextView = tv; 587 } 588 } 589 590 /** 591 * Determine whether to use the system-wide password disguising method, 592 * or to use none. 593 * @param inPassword True if the textfield is a password field. 594 */ 595 /* package */ void setInPassword(boolean inPassword) { 596 if (inPassword) { 597 setInputType(EditorInfo.TYPE_CLASS_TEXT | EditorInfo. 598 TYPE_TEXT_VARIATION_PASSWORD); 599 createBackground(); 600 } 601 // For password fields, draw the WebTextView. For others, just show 602 // webkit's drawing. 603 setWillNotDraw(!inPassword); 604 setBackgroundDrawable(inPassword ? mBackground : null); 605 // For non-password fields, avoid the invals from TextView's blinking 606 // cursor 607 setCursorVisible(inPassword); 608 } 609 610 /** 611 * Private class used for the background of a password textfield. 612 */ 613 private static class OutlineDrawable extends Drawable { 614 public void draw(Canvas canvas) { 615 Rect bounds = getBounds(); 616 Paint paint = new Paint(); 617 paint.setAntiAlias(true); 618 // Draw the background. 619 paint.setColor(Color.WHITE); 620 canvas.drawRect(bounds, paint); 621 // Draw the outline. 622 paint.setStyle(Paint.Style.STROKE); 623 paint.setColor(Color.BLACK); 624 canvas.drawRect(bounds, paint); 625 } 626 // Always want it to be opaque. 627 public int getOpacity() { 628 return PixelFormat.OPAQUE; 629 } 630 // These are needed because they are abstract in Drawable. 631 public void setAlpha(int alpha) { } 632 public void setColorFilter(ColorFilter cf) { } 633 } 634 635 /** 636 * Create a background for the WebTextView and set up the paint for drawing 637 * the text. This way, we can see the password transformation of the 638 * system, which (optionally) shows the actual text before changing to dots. 639 * The background is necessary to hide the webkit-drawn text beneath. 640 */ 641 private void createBackground() { 642 if (mBackground != null) { 643 return; 644 } 645 mBackground = new OutlineDrawable(); 646 647 setGravity(Gravity.CENTER_VERTICAL); 648 // Turn on subpixel text, and turn off kerning, so it better matches 649 // the text in webkit. 650 TextPaint paint = getPaint(); 651 int flags = paint.getFlags() | Paint.SUBPIXEL_TEXT_FLAG | 652 Paint.ANTI_ALIAS_FLAG & ~Paint.DEV_KERN_TEXT_FLAG; 653 paint.setFlags(flags); 654 // Set the text color to black, regardless of the theme. This ensures 655 // that other applications that use embedded WebViews will properly 656 // display the text in password textfields. 657 setTextColor(Color.BLACK); 658 } 659 660 /* package */ void setMaxLength(int maxLength) { 661 mMaxLength = maxLength; 662 if (-1 == maxLength) { 663 setFilters(NO_FILTERS); 664 } else { 665 setFilters(new InputFilter[] { 666 new InputFilter.LengthFilter(maxLength) }); 667 } 668 } 669 670 /** 671 * Set the pointer for this node so it can be determined which node this 672 * WebTextView represents. 673 * @param ptr Integer representing the pointer to the node which this 674 * WebTextView represents. 675 */ 676 /* package */ void setNodePointer(int ptr) { 677 mNodePointer = ptr; 678 } 679 680 /** 681 * Determine the position and size of WebTextView, and add it to the 682 * WebView's view heirarchy. All parameters are presumed to be in 683 * view coordinates. Also requests Focus and sets the cursor to not 684 * request to be in view. 685 * @param x x-position of the textfield. 686 * @param y y-position of the textfield. 687 * @param width width of the textfield. 688 * @param height height of the textfield. 689 */ 690 /* package */ void setRect(int x, int y, int width, int height) { 691 LayoutParams lp = (LayoutParams) getLayoutParams(); 692 if (null == lp) { 693 lp = new LayoutParams(width, height, x, y); 694 } else { 695 lp.x = x; 696 lp.y = y; 697 lp.width = width; 698 lp.height = height; 699 } 700 if (getParent() == null) { 701 mWebView.addView(this, lp); 702 } else { 703 setLayoutParams(lp); 704 } 705 // Set up a measure spec so a layout can always be recreated. 706 mWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY); 707 mHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY); 708 requestFocus(); 709 } 710 711 /** 712 * Set the selection, and disable our onSelectionChanged action. 713 */ 714 /* package */ void setSelectionFromWebKit(int start, int end) { 715 if (start < 0 || end < 0) return; 716 Spannable text = (Spannable) getText(); 717 int length = text.length(); 718 if (start > length || end > length) return; 719 mFromWebKit = true; 720 Selection.setSelection(text, start, end); 721 mFromWebKit = false; 722 } 723 724 /** 725 * Set whether this is a single-line textfield or a multi-line textarea. 726 * Textfields scroll horizontally, and do not handle the enter key. 727 * Textareas behave oppositely. 728 * Do NOT call this after calling setInPassword(true). This will result in 729 * removing the password input type. 730 */ 731 public void setSingleLine(boolean single) { 732 int inputType = EditorInfo.TYPE_CLASS_TEXT 733 | EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT; 734 if (single) { 735 int action = mWebView.nativeTextFieldAction(); 736 switch (action) { 737 // Keep in sync with CachedRoot::ImeAction 738 case 0: // NEXT 739 setImeOptions(EditorInfo.IME_ACTION_NEXT); 740 break; 741 case 1: // GO 742 setImeOptions(EditorInfo.IME_ACTION_GO); 743 break; 744 case -1: // FAILURE 745 case 2: // DONE 746 setImeOptions(EditorInfo.IME_ACTION_DONE); 747 break; 748 } 749 } else { 750 inputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE 751 | EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES 752 | EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT; 753 setImeOptions(EditorInfo.IME_ACTION_NONE); 754 } 755 mSingle = single; 756 setHorizontallyScrolling(single); 757 setInputType(inputType); 758 } 759 760 /** 761 * Set the text for this WebTextView, and set the selection to (start, end) 762 * @param text Text to go into this WebTextView. 763 * @param start Beginning of the selection. 764 * @param end End of the selection. 765 */ 766 /* package */ void setText(CharSequence text, int start, int end) { 767 mPreChange = text.toString(); 768 setText(text); 769 Spannable span = (Spannable) getText(); 770 int length = span.length(); 771 if (end > length) { 772 end = length; 773 } 774 if (start < 0) { 775 start = 0; 776 } else if (start > length) { 777 start = length; 778 } 779 if (DebugFlags.WEB_TEXT_VIEW) { 780 Log.v(LOGTAG, "setText start=" + start 781 + " end=" + end); 782 } 783 Selection.setSelection(span, start, end); 784 } 785 786 /** 787 * Set the text to the new string, but use the old selection, making sure 788 * to keep it within the new string. 789 * @param text The new text to place in the textfield. 790 */ 791 /* package */ void setTextAndKeepSelection(String text) { 792 mPreChange = text.toString(); 793 Editable edit = (Editable) getText(); 794 edit.replace(0, edit.length(), text); 795 updateCachedTextfield(); 796 } 797 798 /** 799 * Update the cache to reflect the current text. 800 */ 801 /* package */ void updateCachedTextfield() { 802 mWebView.updateCachedTextfield(getText().toString()); 803 } 804 805 @Override 806 public boolean requestRectangleOnScreen(Rect rectangle) { 807 // don't scroll while in zoom animation. When it is done, we will adjust 808 // the WebTextView if it is in editing mode. 809 if (!mWebView.inAnimateZoom()) { 810 return super.requestRectangleOnScreen(rectangle); 811 } 812 return false; 813 } 814} 815