WebTextView.java revision 0c5924e9dd1befadae8c73505d3acc9813bf8224
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 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 private boolean mInSetTextAndKeepSelection; 96 // Array to store the final character added in onTextChanged, so that its 97 // KeyEvents may be determined. 98 private char[] mCharacter = new char[1]; 99 // This is used to reset the length filter when on a textfield 100 // with no max length. 101 // FIXME: This can be replaced with TextView.NO_FILTERS if that 102 // is made public/protected. 103 private static final InputFilter[] NO_FILTERS = new InputFilter[0]; 104 105 /** 106 * Create a new WebTextView. 107 * @param context The Context for this WebTextView. 108 * @param webView The WebView that created this. 109 */ 110 /* package */ WebTextView(Context context, WebView webView) { 111 super(context); 112 mWebView = webView; 113 mMaxLength = -1; 114 } 115 116 @Override 117 public boolean dispatchKeyEvent(KeyEvent event) { 118 if (event.isSystem()) { 119 return super.dispatchKeyEvent(event); 120 } 121 // Treat ACTION_DOWN and ACTION MULTIPLE the same 122 boolean down = event.getAction() != KeyEvent.ACTION_UP; 123 int keyCode = event.getKeyCode(); 124 125 boolean isArrowKey = false; 126 switch(keyCode) { 127 case KeyEvent.KEYCODE_DPAD_LEFT: 128 case KeyEvent.KEYCODE_DPAD_RIGHT: 129 case KeyEvent.KEYCODE_DPAD_UP: 130 case KeyEvent.KEYCODE_DPAD_DOWN: 131 if (!mWebView.nativeCursorMatchesFocus()) { 132 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 133 .onKeyUp(keyCode, event); 134 135 } 136 isArrowKey = true; 137 break; 138 } 139 if (!isArrowKey && !mOkayForFocusNotToMatch 140 && mWebView.nativeFocusNodePointer() != mNodePointer) { 141 mWebView.nativeClearCursor(); 142 // Do not call remove() here, which hides the soft keyboard. If 143 // the soft keyboard is being displayed, the user will still want 144 // it there. 145 mWebView.removeView(this); 146 mWebView.requestFocus(); 147 return mWebView.dispatchKeyEvent(event); 148 } 149 // After a jump to next textfield and the first key press, the cursor 150 // and focus will once again match, so reset this value. 151 mOkayForFocusNotToMatch = false; 152 153 Spannable text = (Spannable) getText(); 154 int oldLength = text.length(); 155 // Normally the delete key's dom events are sent via onTextChanged. 156 // However, if the length is zero, the text did not change, so we 157 // go ahead and pass the key down immediately. 158 if (KeyEvent.KEYCODE_DEL == keyCode && 0 == oldLength) { 159 sendDomEvent(event); 160 return true; 161 } 162 163 if ((mSingle && KeyEvent.KEYCODE_ENTER == keyCode)) { 164 if (isPopupShowing()) { 165 return super.dispatchKeyEvent(event); 166 } 167 if (!down) { 168 // Hide the keyboard, since the user has just submitted this 169 // form. The submission happens thanks to the two calls 170 // to sendDomEvent. 171 InputMethodManager.getInstance(mContext) 172 .hideSoftInputFromWindow(getWindowToken(), 0); 173 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, keyCode)); 174 sendDomEvent(event); 175 } 176 return super.dispatchKeyEvent(event); 177 } else if (KeyEvent.KEYCODE_DPAD_CENTER == keyCode) { 178 // Note that this handles center key and trackball. 179 if (isPopupShowing()) { 180 return super.dispatchKeyEvent(event); 181 } 182 if (!mWebView.nativeCursorMatchesFocus()) { 183 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 184 .onKeyUp(keyCode, event); 185 } 186 // Center key should be passed to a potential onClick 187 if (!down) { 188 mWebView.shortPressOnTextField(); 189 } 190 // Pass to super to handle longpress. 191 return super.dispatchKeyEvent(event); 192 } 193 194 // Ensure there is a layout so arrow keys are handled properly. 195 if (getLayout() == null) { 196 measure(mWidthSpec, mHeightSpec); 197 } 198 int oldStart = Selection.getSelectionStart(text); 199 int oldEnd = Selection.getSelectionEnd(text); 200 201 boolean maxedOut = mMaxLength != -1 && oldLength == mMaxLength; 202 // If we are at max length, and there is a selection rather than a 203 // cursor, we need to store the text to compare later, since the key 204 // may have changed the string. 205 String oldText; 206 if (maxedOut && oldEnd != oldStart) { 207 oldText = text.toString(); 208 } else { 209 oldText = ""; 210 } 211 if (super.dispatchKeyEvent(event)) { 212 // If the WebTextView handled the key it was either an alphanumeric 213 // key, a delete, or a movement within the text. All of those are 214 // ok to pass to javascript. 215 216 // UNLESS there is a max length determined by the html. In that 217 // case, if the string was already at the max length, an 218 // alphanumeric key will be erased by the LengthFilter, 219 // so do not pass down to javascript, and instead 220 // return true. If it is an arrow key or a delete key, we can go 221 // ahead and pass it down. 222 if (KeyEvent.KEYCODE_ENTER == keyCode) { 223 // For multi-line text boxes, newlines will 224 // trigger onTextChanged for key down (which will send both 225 // key up and key down) but not key up. 226 mGotEnterDown = true; 227 } 228 if (maxedOut && !isArrowKey && keyCode != KeyEvent.KEYCODE_DEL) { 229 if (oldEnd == oldStart) { 230 // Return true so the key gets dropped. 231 return true; 232 } else if (!oldText.equals(getText().toString())) { 233 // FIXME: This makes the text work properly, but it 234 // does not pass down the key event, so it may not 235 // work for a textfield that has the type of 236 // behavior of GoogleSuggest. That said, it is 237 // unlikely that a site would combine the two in 238 // one textfield. 239 Spannable span = (Spannable) getText(); 240 int newStart = Selection.getSelectionStart(span); 241 int newEnd = Selection.getSelectionEnd(span); 242 mWebView.replaceTextfieldText(0, oldLength, span.toString(), 243 newStart, newEnd); 244 return true; 245 } 246 } 247 /* FIXME: 248 * In theory, we would like to send the events for the arrow keys. 249 * However, the TextView can arbitrarily change the selection (i.e. 250 * long press followed by using the trackball). Therefore, we keep 251 * in sync with the TextView via onSelectionChanged. If we also 252 * send the DOM event, we lose the correct selection. 253 if (isArrowKey) { 254 // Arrow key does not change the text, but we still want to send 255 // the DOM events. 256 sendDomEvent(event); 257 } 258 */ 259 return true; 260 } 261 // Ignore the key up event for newlines. This prevents 262 // multiple newlines in the native textarea. 263 if (mGotEnterDown && !down) { 264 return true; 265 } 266 // if it is a navigation key, pass it to WebView 267 if (isArrowKey) { 268 // WebView check the trackballtime in onKeyDown to avoid calling 269 // native from both trackball and key handling. As this is called 270 // from WebTextView, we always want WebView to check with native. 271 // Reset trackballtime to ensure it. 272 mWebView.resetTrackballTime(); 273 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 274 .onKeyUp(keyCode, event); 275 } 276 return false; 277 } 278 279 /** 280 * Determine whether this WebTextView currently represents the node 281 * represented by ptr. 282 * @param ptr Pointer to a node to compare to. 283 * @return boolean Whether this WebTextView already represents the node 284 * pointed to by ptr. 285 */ 286 /* package */ boolean isSameTextField(int ptr) { 287 return ptr == mNodePointer; 288 } 289 290 @Override public InputConnection onCreateInputConnection( 291 EditorInfo outAttrs) { 292 InputConnection connection = super.onCreateInputConnection(outAttrs); 293 if (mWebView != null) { 294 // Use the name of the textfield + the url. Use backslash as an 295 // arbitrary separator. 296 outAttrs.fieldName = mWebView.nativeFocusCandidateName() + "\\" 297 + mWebView.getUrl(); 298 } 299 return connection; 300 } 301 302 @Override 303 public void onEditorAction(int actionCode) { 304 switch (actionCode) { 305 case EditorInfo.IME_ACTION_NEXT: 306 mWebView.nativeMoveCursorToNextTextInput(); 307 // Preemptively rebuild the WebTextView, so that the action will 308 // be set properly. 309 mWebView.rebuildWebTextView(); 310 // Since the cursor will no longer be in the same place as the 311 // focus, set the focus controller back to inactive 312 mWebView.setFocusControllerInactive(); 313 mWebView.invalidate(); 314 mOkayForFocusNotToMatch = true; 315 break; 316 case EditorInfo.IME_ACTION_DONE: 317 super.onEditorAction(actionCode); 318 break; 319 case EditorInfo.IME_ACTION_GO: 320 // Send an enter and hide the soft keyboard 321 InputMethodManager.getInstance(mContext) 322 .hideSoftInputFromWindow(getWindowToken(), 0); 323 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 324 KeyEvent.KEYCODE_ENTER)); 325 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 326 KeyEvent.KEYCODE_ENTER)); 327 328 default: 329 break; 330 } 331 } 332 333 @Override 334 protected void onSelectionChanged(int selStart, int selEnd) { 335 // This code is copied from TextView.onDraw(). That code does not get 336 // executed, however, because the WebTextView does not draw, allowing 337 // webkit's drawing to show through. 338 InputMethodManager imm = InputMethodManager.peekInstance(); 339 if (imm != null && imm.isActive(this)) { 340 Spannable sp = (Spannable) getText(); 341 int candStart = EditableInputConnection.getComposingSpanStart(sp); 342 int candEnd = EditableInputConnection.getComposingSpanEnd(sp); 343 imm.updateSelection(this, selStart, selEnd, candStart, candEnd); 344 } 345 if (!mFromWebKit && mWebView != null) { 346 if (DebugFlags.WEB_TEXT_VIEW) { 347 Log.v(LOGTAG, "onSelectionChanged selStart=" + selStart 348 + " selEnd=" + selEnd); 349 } 350 mWebView.setSelection(selStart, selEnd); 351 } 352 } 353 354 @Override 355 protected void onTextChanged(CharSequence s,int start,int before,int count){ 356 super.onTextChanged(s, start, before, count); 357 String postChange = s.toString(); 358 // Prevent calls to setText from invoking onTextChanged (since this will 359 // mean we are on a different textfield). Also prevent the change when 360 // going from a textfield with a string of text to one with a smaller 361 // limit on text length from registering the onTextChanged event. 362 if (mPreChange == null || mPreChange.equals(postChange) || 363 (mMaxLength > -1 && mPreChange.length() > mMaxLength && 364 mPreChange.substring(0, mMaxLength).equals(postChange))) { 365 return; 366 } 367 mPreChange = postChange; 368 // This was simply a delete or a cut, so just delete the selection. 369 if (before > 0 && 0 == count) { 370 mWebView.deleteSelection(start, start + before); 371 // For this and all changes to the text, update our cache 372 updateCachedTextfield(); 373 return; 374 } 375 // Find the last character being replaced. If it can be represented by 376 // events, we will pass them to native (after replacing the beginning 377 // of the changed text), so we can see javascript events. 378 // Otherwise, replace the text being changed (including the last 379 // character) in the textfield. 380 TextUtils.getChars(s, start + count - 1, start + count, mCharacter, 0); 381 KeyCharacterMap kmap = 382 KeyCharacterMap.load(KeyCharacterMap.BUILT_IN_KEYBOARD); 383 KeyEvent[] events = kmap.getEvents(mCharacter); 384 boolean cannotUseKeyEvents = null == events; 385 int charactersFromKeyEvents = cannotUseKeyEvents ? 0 : 1; 386 if (count > 1 || cannotUseKeyEvents) { 387 String replace = s.subSequence(start, 388 start + count - charactersFromKeyEvents).toString(); 389 mWebView.replaceTextfieldText(start, start + before, replace, 390 start + count - charactersFromKeyEvents, 391 start + count - charactersFromKeyEvents); 392 } else { 393 // This corrects the selection which may have been affected by the 394 // trackball or auto-correct. 395 if (DebugFlags.WEB_TEXT_VIEW) { 396 Log.v(LOGTAG, "onTextChanged start=" + start 397 + " start + before=" + (start + before)); 398 } 399 if (!mInSetTextAndKeepSelection) { 400 mWebView.setSelection(start, start + before); 401 } 402 } 403 if (!cannotUseKeyEvents) { 404 int length = events.length; 405 for (int i = 0; i < length; i++) { 406 // We never send modifier keys to native code so don't send them 407 // here either. 408 if (!KeyEvent.isModifierKey(events[i].getKeyCode())) { 409 sendDomEvent(events[i]); 410 } 411 } 412 } 413 updateCachedTextfield(); 414 } 415 416 @Override 417 public boolean onTouchEvent(MotionEvent event) { 418 switch (event.getAction()) { 419 case MotionEvent.ACTION_DOWN: 420 super.onTouchEvent(event); 421 // This event may be the start of a drag, so store it to pass to the 422 // WebView if it is. 423 mDragStartX = event.getX(); 424 mDragStartY = event.getY(); 425 mDragStartTime = event.getEventTime(); 426 mDragSent = false; 427 mScrolled = false; 428 mGotTouchDown = true; 429 break; 430 case MotionEvent.ACTION_MOVE: 431 int slop = ViewConfiguration.get(mContext).getScaledTouchSlop(); 432 Spannable buffer = getText(); 433 int initialScrollX = Touch.getInitialScrollX(this, buffer); 434 int initialScrollY = Touch.getInitialScrollY(this, buffer); 435 super.onTouchEvent(event); 436 int dx = Math.abs(mScrollX - initialScrollX); 437 int dy = Math.abs(mScrollY - initialScrollY); 438 // Use a smaller slop when checking to see if we've moved far enough 439 // to scroll the text, because experimentally, slop has shown to be 440 // to big for the case of a small textfield. 441 int smallerSlop = slop/2; 442 if (dx > smallerSlop || dy > smallerSlop) { 443 if (mWebView != null) { 444 float maxScrollX = (float) Touch.getMaxScrollX(this, 445 getLayout(), mScrollY); 446 if (DebugFlags.WEB_TEXT_VIEW) { 447 Log.v(LOGTAG, "onTouchEvent x=" + mScrollX + " y=" 448 + mScrollY + " maxX=" + maxScrollX); 449 } 450 mWebView.scrollFocusedTextInput(maxScrollX > 0 ? 451 mScrollX / maxScrollX : 0, mScrollY); 452 } 453 mScrolled = true; 454 return true; 455 } 456 if (Math.abs((int) event.getX() - mDragStartX) < slop 457 && Math.abs((int) event.getY() - mDragStartY) < slop) { 458 // If the user has not scrolled further than slop, we should not 459 // send the drag. Instead, do nothing, and when the user lifts 460 // their finger, we will change the selection. 461 return true; 462 } 463 if (mWebView != null) { 464 // Only want to set the initial state once. 465 if (!mDragSent) { 466 mWebView.initiateTextFieldDrag(mDragStartX, mDragStartY, 467 mDragStartTime); 468 mDragSent = true; 469 } 470 boolean scrolled = mWebView.textFieldDrag(event); 471 if (scrolled) { 472 mScrolled = true; 473 cancelLongPress(); 474 return true; 475 } 476 } 477 return false; 478 case MotionEvent.ACTION_UP: 479 case MotionEvent.ACTION_CANCEL: 480 if (!mScrolled) { 481 // If the page scrolled, or the TextView scrolled, we do not 482 // want to change the selection 483 cancelLongPress(); 484 if (mGotTouchDown && mWebView != null) { 485 mWebView.touchUpOnTextField(event); 486 } 487 } 488 // Necessary for the WebView to reset its state 489 if (mWebView != null && mDragSent) { 490 mWebView.onTouchEvent(event); 491 } 492 mGotTouchDown = false; 493 break; 494 default: 495 break; 496 } 497 return true; 498 } 499 500 @Override 501 public boolean onTrackballEvent(MotionEvent event) { 502 if (isPopupShowing()) { 503 return super.onTrackballEvent(event); 504 } 505 if (event.getAction() != MotionEvent.ACTION_MOVE) { 506 return false; 507 } 508 // If the Cursor is not on the text input, webview should handle the 509 // trackball 510 if (!mWebView.nativeCursorMatchesFocus()) { 511 return mWebView.onTrackballEvent(event); 512 } 513 Spannable text = (Spannable) getText(); 514 MovementMethod move = getMovementMethod(); 515 if (move != null && getLayout() != null && 516 move.onTrackballEvent(this, text, event)) { 517 // Selection is changed in onSelectionChanged 518 return true; 519 } 520 return false; 521 } 522 523 /** 524 * Remove this WebTextView from its host WebView, and return 525 * focus to the host. 526 */ 527 /* package */ void remove() { 528 // hide the soft keyboard when the edit text is out of focus 529 InputMethodManager.getInstance(mContext).hideSoftInputFromWindow( 530 getWindowToken(), 0); 531 mWebView.removeView(this); 532 mWebView.requestFocus(); 533 } 534 535 /* package */ void bringIntoView() { 536 if (getLayout() != null) { 537 bringPointIntoView(Selection.getSelectionEnd(getText())); 538 } 539 } 540 541 /** 542 * Send the DOM events for the specified event. 543 * @param event KeyEvent to be translated into a DOM event. 544 */ 545 private void sendDomEvent(KeyEvent event) { 546 mWebView.passToJavaScript(getText().toString(), event); 547 } 548 549 /** 550 * Always use this instead of setAdapter, as this has features specific to 551 * the WebTextView. 552 */ 553 public void setAdapterCustom(AutoCompleteAdapter adapter) { 554 if (adapter != null) { 555 setInputType(EditorInfo.TYPE_TEXT_FLAG_AUTO_COMPLETE); 556 adapter.setTextView(this); 557 } 558 super.setAdapter(adapter); 559 } 560 561 /** 562 * This is a special version of ArrayAdapter which changes its text size 563 * to match the text size of its host TextView. 564 */ 565 public static class AutoCompleteAdapter extends ArrayAdapter<String> { 566 private TextView mTextView; 567 568 public AutoCompleteAdapter(Context context, ArrayList<String> entries) { 569 super(context, com.android.internal.R.layout 570 .search_dropdown_item_1line, entries); 571 } 572 573 /** 574 * {@inheritDoc} 575 */ 576 public View getView(int position, View convertView, ViewGroup parent) { 577 TextView tv = 578 (TextView) super.getView(position, convertView, parent); 579 if (tv != null && mTextView != null) { 580 tv.setTextSize(mTextView.getTextSize()); 581 } 582 return tv; 583 } 584 585 /** 586 * Set the TextView so we can match its text size. 587 */ 588 private void setTextView(TextView tv) { 589 mTextView = tv; 590 } 591 } 592 593 /** 594 * Determine whether to use the system-wide password disguising method, 595 * or to use none. 596 * @param inPassword True if the textfield is a password field. 597 */ 598 /* package */ void setInPassword(boolean inPassword) { 599 if (inPassword) { 600 setInputType(EditorInfo.TYPE_CLASS_TEXT | EditorInfo. 601 TYPE_TEXT_VARIATION_PASSWORD); 602 createBackground(); 603 } 604 // For password fields, draw the WebTextView. For others, just show 605 // webkit's drawing. 606 setWillNotDraw(!inPassword); 607 setBackgroundDrawable(inPassword ? mBackground : null); 608 // For non-password fields, avoid the invals from TextView's blinking 609 // cursor 610 setCursorVisible(inPassword); 611 } 612 613 /** 614 * Private class used for the background of a password textfield. 615 */ 616 private static class OutlineDrawable extends Drawable { 617 public void draw(Canvas canvas) { 618 Rect bounds = getBounds(); 619 Paint paint = new Paint(); 620 paint.setAntiAlias(true); 621 // Draw the background. 622 paint.setColor(Color.WHITE); 623 canvas.drawRect(bounds, paint); 624 // Draw the outline. 625 paint.setStyle(Paint.Style.STROKE); 626 paint.setColor(Color.BLACK); 627 canvas.drawRect(bounds, paint); 628 } 629 // Always want it to be opaque. 630 public int getOpacity() { 631 return PixelFormat.OPAQUE; 632 } 633 // These are needed because they are abstract in Drawable. 634 public void setAlpha(int alpha) { } 635 public void setColorFilter(ColorFilter cf) { } 636 } 637 638 /** 639 * Create a background for the WebTextView and set up the paint for drawing 640 * the text. This way, we can see the password transformation of the 641 * system, which (optionally) shows the actual text before changing to dots. 642 * The background is necessary to hide the webkit-drawn text beneath. 643 */ 644 private void createBackground() { 645 if (mBackground != null) { 646 return; 647 } 648 mBackground = new OutlineDrawable(); 649 650 setGravity(Gravity.CENTER_VERTICAL); 651 // Turn on subpixel text, and turn off kerning, so it better matches 652 // the text in webkit. 653 TextPaint paint = getPaint(); 654 int flags = paint.getFlags() | Paint.SUBPIXEL_TEXT_FLAG | 655 Paint.ANTI_ALIAS_FLAG & ~Paint.DEV_KERN_TEXT_FLAG; 656 paint.setFlags(flags); 657 // Set the text color to black, regardless of the theme. This ensures 658 // that other applications that use embedded WebViews will properly 659 // display the text in password textfields. 660 setTextColor(Color.BLACK); 661 } 662 663 /* package */ void setMaxLength(int maxLength) { 664 mMaxLength = maxLength; 665 if (-1 == maxLength) { 666 setFilters(NO_FILTERS); 667 } else { 668 setFilters(new InputFilter[] { 669 new InputFilter.LengthFilter(maxLength) }); 670 } 671 } 672 673 /** 674 * Set the pointer for this node so it can be determined which node this 675 * WebTextView represents. 676 * @param ptr Integer representing the pointer to the node which this 677 * WebTextView represents. 678 */ 679 /* package */ void setNodePointer(int ptr) { 680 mNodePointer = ptr; 681 } 682 683 /** 684 * Determine the position and size of WebTextView, and add it to the 685 * WebView's view heirarchy. All parameters are presumed to be in 686 * view coordinates. Also requests Focus and sets the cursor to not 687 * request to be in view. 688 * @param x x-position of the textfield. 689 * @param y y-position of the textfield. 690 * @param width width of the textfield. 691 * @param height height of the textfield. 692 */ 693 /* package */ void setRect(int x, int y, int width, int height) { 694 LayoutParams lp = (LayoutParams) getLayoutParams(); 695 if (null == lp) { 696 lp = new LayoutParams(width, height, x, y); 697 } else { 698 lp.x = x; 699 lp.y = y; 700 lp.width = width; 701 lp.height = height; 702 } 703 if (getParent() == null) { 704 mWebView.addView(this, lp); 705 } else { 706 setLayoutParams(lp); 707 } 708 // Set up a measure spec so a layout can always be recreated. 709 mWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY); 710 mHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY); 711 requestFocus(); 712 } 713 714 /** 715 * Set the selection, and disable our onSelectionChanged action. 716 */ 717 /* package */ void setSelectionFromWebKit(int start, int end) { 718 if (start < 0 || end < 0) return; 719 Spannable text = (Spannable) getText(); 720 int length = text.length(); 721 if (start > length || end > length) return; 722 mFromWebKit = true; 723 Selection.setSelection(text, start, end); 724 mFromWebKit = false; 725 } 726 727 /** 728 * Set whether this is a single-line textfield or a multi-line textarea. 729 * Textfields scroll horizontally, and do not handle the enter key. 730 * Textareas behave oppositely. 731 * Do NOT call this after calling setInPassword(true). This will result in 732 * removing the password input type. 733 */ 734 public void setSingleLine(boolean single) { 735 int inputType = EditorInfo.TYPE_CLASS_TEXT 736 | EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT; 737 if (single) { 738 int action = mWebView.nativeTextFieldAction(); 739 switch (action) { 740 // Keep in sync with CachedRoot::ImeAction 741 case 0: // NEXT 742 setImeOptions(EditorInfo.IME_ACTION_NEXT); 743 break; 744 case 1: // GO 745 setImeOptions(EditorInfo.IME_ACTION_GO); 746 break; 747 case -1: // FAILURE 748 case 2: // DONE 749 setImeOptions(EditorInfo.IME_ACTION_DONE); 750 break; 751 } 752 } else { 753 inputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE 754 | EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES 755 | EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT; 756 setImeOptions(EditorInfo.IME_ACTION_NONE); 757 } 758 mSingle = single; 759 setHorizontallyScrolling(single); 760 setInputType(inputType); 761 } 762 763 /** 764 * Set the text for this WebTextView, and set the selection to (start, end) 765 * @param text Text to go into this WebTextView. 766 * @param start Beginning of the selection. 767 * @param end End of the selection. 768 */ 769 /* package */ void setText(CharSequence text, int start, int end) { 770 mPreChange = text.toString(); 771 setText(text); 772 Spannable span = (Spannable) getText(); 773 int length = span.length(); 774 if (end > length) { 775 end = length; 776 } 777 if (start < 0) { 778 start = 0; 779 } else if (start > length) { 780 start = length; 781 } 782 if (DebugFlags.WEB_TEXT_VIEW) { 783 Log.v(LOGTAG, "setText start=" + start 784 + " end=" + end); 785 } 786 Selection.setSelection(span, start, end); 787 } 788 789 /** 790 * Set the text to the new string, but use the old selection, making sure 791 * to keep it within the new string. 792 * @param text The new text to place in the textfield. 793 */ 794 /* package */ void setTextAndKeepSelection(String text) { 795 mPreChange = text.toString(); 796 Editable edit = (Editable) getText(); 797 mInSetTextAndKeepSelection = true; 798 edit.replace(0, edit.length(), text); 799 mInSetTextAndKeepSelection = false; 800 updateCachedTextfield(); 801 } 802 803 /** 804 * Update the cache to reflect the current text. 805 */ 806 /* package */ void updateCachedTextfield() { 807 mWebView.updateCachedTextfield(getText().toString()); 808 } 809 810 @Override 811 public boolean requestRectangleOnScreen(Rect rectangle) { 812 // don't scroll while in zoom animation. When it is done, we will adjust 813 // the WebTextView if it is in editing mode. 814 if (!mWebView.inAnimateZoom()) { 815 return super.requestRectangleOnScreen(rectangle); 816 } 817 return false; 818 } 819} 820