WebTextView.java revision 1d96ca06d83ef87544a7053ab6c19b3b8233ae4b
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 boolean mResendKeyDown; 92 // Whether or not a selection change was generated from webkit. If it was, 93 // we do not need to pass the selection back to webkit. 94 private boolean mFromWebKit; 95 private boolean mGotTouchDown; 96 private boolean mInSetTextAndKeepSelection; 97 // Array to store the final character added in onTextChanged, so that its 98 // KeyEvents may be determined. 99 private char[] mCharacter = new char[1]; 100 // This is used to reset the length filter when on a textfield 101 // with no max length. 102 // FIXME: This can be replaced with TextView.NO_FILTERS if that 103 // is made public/protected. 104 private static final InputFilter[] NO_FILTERS = new InputFilter[0]; 105 106 /** 107 * Create a new WebTextView. 108 * @param context The Context for this WebTextView. 109 * @param webView The WebView that created this. 110 */ 111 /* package */ WebTextView(Context context, WebView webView) { 112 super(context); 113 mWebView = webView; 114 mMaxLength = -1; 115 } 116 117 @Override 118 public boolean dispatchKeyEvent(KeyEvent event) { 119 if (event.isSystem()) { 120 return super.dispatchKeyEvent(event); 121 } 122 // Treat ACTION_DOWN and ACTION MULTIPLE the same 123 boolean down = event.getAction() != KeyEvent.ACTION_UP; 124 int keyCode = event.getKeyCode(); 125 126 boolean isArrowKey = false; 127 switch(keyCode) { 128 case KeyEvent.KEYCODE_DPAD_LEFT: 129 case KeyEvent.KEYCODE_DPAD_RIGHT: 130 case KeyEvent.KEYCODE_DPAD_UP: 131 case KeyEvent.KEYCODE_DPAD_DOWN: 132 if (!mWebView.nativeCursorMatchesFocus()) { 133 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 134 .onKeyUp(keyCode, event); 135 136 } 137 isArrowKey = true; 138 break; 139 } 140 if (!isArrowKey && !mOkayForFocusNotToMatch && !mResendKeyDown 141 && mWebView.nativeFocusNodePointer() != mNodePointer) { 142 if (mWebView.nativeFocusNodePointer() != 0) { 143 mWebView.nativeClearCursor(); 144 } 145 // Do not call remove() here, which hides the soft keyboard. If 146 // the soft keyboard is being displayed, the user will still want 147 // it there. 148 mWebView.removeView(this); 149 mWebView.requestFocus(); 150 return mWebView.dispatchKeyEvent(event); 151 } 152 // After a jump to next textfield and the first key press, the cursor 153 // and focus will once again match, so reset this value. 154 mOkayForFocusNotToMatch = false; 155 mResendKeyDown = false; 156 Spannable text = (Spannable) getText(); 157 int oldLength = text.length(); 158 // Normally the delete key's dom events are sent via onTextChanged. 159 // However, if the length is zero, the text did not change, so we 160 // go ahead and pass the key down immediately. 161 if (KeyEvent.KEYCODE_DEL == keyCode && 0 == oldLength) { 162 sendDomEvent(event); 163 return true; 164 } 165 166 if ((mSingle && KeyEvent.KEYCODE_ENTER == keyCode)) { 167 if (isPopupShowing()) { 168 return super.dispatchKeyEvent(event); 169 } 170 if (!down) { 171 // Hide the keyboard, since the user has just submitted this 172 // form. The submission happens thanks to the two calls 173 // to sendDomEvent. 174 InputMethodManager.getInstance(mContext) 175 .hideSoftInputFromWindow(getWindowToken(), 0); 176 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, keyCode)); 177 sendDomEvent(event); 178 } 179 return super.dispatchKeyEvent(event); 180 } else if (KeyEvent.KEYCODE_DPAD_CENTER == keyCode) { 181 // Note that this handles center key and trackball. 182 if (isPopupShowing()) { 183 return super.dispatchKeyEvent(event); 184 } 185 if (!mWebView.nativeCursorMatchesFocus()) { 186 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 187 .onKeyUp(keyCode, event); 188 } 189 // Center key should be passed to a potential onClick 190 if (!down) { 191 mWebView.centerKeyPressOnTextField(); 192 } 193 // Pass to super to handle longpress. 194 return super.dispatchKeyEvent(event); 195 } 196 197 // Ensure there is a layout so arrow keys are handled properly. 198 if (getLayout() == null) { 199 measure(mWidthSpec, mHeightSpec); 200 } 201 int oldStart = Selection.getSelectionStart(text); 202 int oldEnd = Selection.getSelectionEnd(text); 203 204 boolean maxedOut = mMaxLength != -1 && oldLength == mMaxLength; 205 // If we are at max length, and there is a selection rather than a 206 // cursor, we need to store the text to compare later, since the key 207 // may have changed the string. 208 String oldText; 209 if (maxedOut && oldEnd != oldStart) { 210 oldText = text.toString(); 211 } else { 212 oldText = ""; 213 } 214 if (super.dispatchKeyEvent(event)) { 215 // If the WebTextView handled the key it was either an alphanumeric 216 // key, a delete, or a movement within the text. All of those are 217 // ok to pass to javascript. 218 219 // UNLESS there is a max length determined by the html. In that 220 // case, if the string was already at the max length, an 221 // alphanumeric key will be erased by the LengthFilter, 222 // so do not pass down to javascript, and instead 223 // return true. If it is an arrow key or a delete key, we can go 224 // ahead and pass it down. 225 if (KeyEvent.KEYCODE_ENTER == keyCode) { 226 // For multi-line text boxes, newlines will 227 // trigger onTextChanged for key down (which will send both 228 // key up and key down) but not key up. 229 mGotEnterDown = true; 230 } 231 if (maxedOut && !isArrowKey && keyCode != KeyEvent.KEYCODE_DEL) { 232 if (oldEnd == oldStart) { 233 // Return true so the key gets dropped. 234 return true; 235 } else if (!oldText.equals(getText().toString())) { 236 // FIXME: This makes the text work properly, but it 237 // does not pass down the key event, so it may not 238 // work for a textfield that has the type of 239 // behavior of GoogleSuggest. That said, it is 240 // unlikely that a site would combine the two in 241 // one textfield. 242 Spannable span = (Spannable) getText(); 243 int newStart = Selection.getSelectionStart(span); 244 int newEnd = Selection.getSelectionEnd(span); 245 mWebView.replaceTextfieldText(0, oldLength, span.toString(), 246 newStart, newEnd); 247 return true; 248 } 249 } 250 /* FIXME: 251 * In theory, we would like to send the events for the arrow keys. 252 * However, the TextView can arbitrarily change the selection (i.e. 253 * long press followed by using the trackball). Therefore, we keep 254 * in sync with the TextView via onSelectionChanged. If we also 255 * send the DOM event, we lose the correct selection. 256 if (isArrowKey) { 257 // Arrow key does not change the text, but we still want to send 258 // the DOM events. 259 sendDomEvent(event); 260 } 261 */ 262 return true; 263 } 264 // Ignore the key up event for newlines. This prevents 265 // multiple newlines in the native textarea. 266 if (mGotEnterDown && !down) { 267 return true; 268 } 269 // if it is a navigation key, pass it to WebView 270 if (isArrowKey) { 271 // WebView check the trackballtime in onKeyDown to avoid calling 272 // native from both trackball and key handling. As this is called 273 // from WebTextView, we always want WebView to check with native. 274 // Reset trackballtime to ensure it. 275 mWebView.resetTrackballTime(); 276 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 277 .onKeyUp(keyCode, event); 278 } 279 return false; 280 } 281 282 /** 283 * Determine whether this WebTextView currently represents the node 284 * represented by ptr. 285 * @param ptr Pointer to a node to compare to. 286 * @return boolean Whether this WebTextView already represents the node 287 * pointed to by ptr. 288 */ 289 /* package */ boolean isSameTextField(int ptr) { 290 return ptr == mNodePointer; 291 } 292 293 @Override public InputConnection onCreateInputConnection( 294 EditorInfo outAttrs) { 295 InputConnection connection = super.onCreateInputConnection(outAttrs); 296 if (mWebView != null) { 297 // Use the name of the textfield + the url. Use backslash as an 298 // arbitrary separator. 299 outAttrs.fieldName = mWebView.nativeFocusCandidateName() + "\\" 300 + mWebView.getUrl(); 301 } 302 return connection; 303 } 304 305 @Override 306 public void onEditorAction(int actionCode) { 307 switch (actionCode) { 308 case EditorInfo.IME_ACTION_NEXT: 309 mWebView.nativeMoveCursorToNextTextInput(); 310 // Preemptively rebuild the WebTextView, so that the action will 311 // be set properly. 312 mWebView.rebuildWebTextView(); 313 // Since the cursor will no longer be in the same place as the 314 // focus, set the focus controller back to inactive 315 mWebView.setFocusControllerInactive(); 316 mWebView.invalidate(); 317 mOkayForFocusNotToMatch = true; 318 break; 319 case EditorInfo.IME_ACTION_DONE: 320 super.onEditorAction(actionCode); 321 break; 322 case EditorInfo.IME_ACTION_GO: 323 // Send an enter and hide the soft keyboard 324 InputMethodManager.getInstance(mContext) 325 .hideSoftInputFromWindow(getWindowToken(), 0); 326 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 327 KeyEvent.KEYCODE_ENTER)); 328 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 329 KeyEvent.KEYCODE_ENTER)); 330 331 default: 332 break; 333 } 334 } 335 336 @Override 337 protected void onSelectionChanged(int selStart, int selEnd) { 338 // This code is copied from TextView.onDraw(). That code does not get 339 // executed, however, because the WebTextView does not draw, allowing 340 // webkit's drawing to show through. 341 InputMethodManager imm = InputMethodManager.peekInstance(); 342 if (imm != null && imm.isActive(this)) { 343 Spannable sp = (Spannable) getText(); 344 int candStart = EditableInputConnection.getComposingSpanStart(sp); 345 int candEnd = EditableInputConnection.getComposingSpanEnd(sp); 346 imm.updateSelection(this, selStart, selEnd, candStart, candEnd); 347 } 348 if (!mFromWebKit && mWebView != null) { 349 if (DebugFlags.WEB_TEXT_VIEW) { 350 Log.v(LOGTAG, "onSelectionChanged selStart=" + selStart 351 + " selEnd=" + selEnd); 352 } 353 mWebView.setSelection(selStart, selEnd); 354 } 355 } 356 357 @Override 358 protected void onTextChanged(CharSequence s,int start,int before,int count){ 359 super.onTextChanged(s, start, before, count); 360 String postChange = s.toString(); 361 // Prevent calls to setText from invoking onTextChanged (since this will 362 // mean we are on a different textfield). Also prevent the change when 363 // going from a textfield with a string of text to one with a smaller 364 // limit on text length from registering the onTextChanged event. 365 if (mPreChange == null || mPreChange.equals(postChange) || 366 (mMaxLength > -1 && mPreChange.length() > mMaxLength && 367 mPreChange.substring(0, mMaxLength).equals(postChange))) { 368 return; 369 } 370 mPreChange = postChange; 371 // This was simply a delete or a cut, so just delete the selection. 372 if (before > 0 && 0 == count) { 373 mWebView.deleteSelection(start, start + before); 374 // For this and all changes to the text, update our cache 375 updateCachedTextfield(); 376 return; 377 } 378 // Find the last character being replaced. If it can be represented by 379 // events, we will pass them to native (after replacing the beginning 380 // of the changed text), so we can see javascript events. 381 // Otherwise, replace the text being changed (including the last 382 // character) in the textfield. 383 TextUtils.getChars(s, start + count - 1, start + count, mCharacter, 0); 384 KeyCharacterMap kmap = 385 KeyCharacterMap.load(KeyCharacterMap.BUILT_IN_KEYBOARD); 386 KeyEvent[] events = kmap.getEvents(mCharacter); 387 boolean cannotUseKeyEvents = null == events; 388 int charactersFromKeyEvents = cannotUseKeyEvents ? 0 : 1; 389 if (count > 1 || cannotUseKeyEvents) { 390 String replace = s.subSequence(start, 391 start + count - charactersFromKeyEvents).toString(); 392 mWebView.replaceTextfieldText(start, start + before, replace, 393 start + count - charactersFromKeyEvents, 394 start + count - charactersFromKeyEvents); 395 } else { 396 // This corrects the selection which may have been affected by the 397 // trackball or auto-correct. 398 if (DebugFlags.WEB_TEXT_VIEW) { 399 Log.v(LOGTAG, "onTextChanged start=" + start 400 + " start + before=" + (start + before)); 401 } 402 if (!mInSetTextAndKeepSelection) { 403 mWebView.setSelection(start, start + before); 404 } 405 } 406 if (!cannotUseKeyEvents) { 407 int length = events.length; 408 for (int i = 0; i < length; i++) { 409 // We never send modifier keys to native code so don't send them 410 // here either. 411 if (!KeyEvent.isModifierKey(events[i].getKeyCode())) { 412 sendDomEvent(events[i]); 413 } 414 } 415 } 416 updateCachedTextfield(); 417 } 418 419 @Override 420 public boolean onTouchEvent(MotionEvent event) { 421 switch (event.getAction()) { 422 case MotionEvent.ACTION_DOWN: 423 super.onTouchEvent(event); 424 // This event may be the start of a drag, so store it to pass to the 425 // WebView if it is. 426 mDragStartX = event.getX(); 427 mDragStartY = event.getY(); 428 mDragStartTime = event.getEventTime(); 429 mDragSent = false; 430 mScrolled = false; 431 mGotTouchDown = true; 432 break; 433 case MotionEvent.ACTION_MOVE: 434 int slop = ViewConfiguration.get(mContext).getScaledTouchSlop(); 435 Spannable buffer = getText(); 436 int initialScrollX = Touch.getInitialScrollX(this, buffer); 437 int initialScrollY = Touch.getInitialScrollY(this, buffer); 438 super.onTouchEvent(event); 439 int dx = Math.abs(mScrollX - initialScrollX); 440 int dy = Math.abs(mScrollY - initialScrollY); 441 // Use a smaller slop when checking to see if we've moved far enough 442 // to scroll the text, because experimentally, slop has shown to be 443 // to big for the case of a small textfield. 444 int smallerSlop = slop/2; 445 if (dx > smallerSlop || dy > smallerSlop) { 446 if (mWebView != null) { 447 float maxScrollX = (float) Touch.getMaxScrollX(this, 448 getLayout(), mScrollY); 449 if (DebugFlags.WEB_TEXT_VIEW) { 450 Log.v(LOGTAG, "onTouchEvent x=" + mScrollX + " y=" 451 + mScrollY + " maxX=" + maxScrollX); 452 } 453 mWebView.scrollFocusedTextInput(maxScrollX > 0 ? 454 mScrollX / maxScrollX : 0, mScrollY); 455 } 456 mScrolled = true; 457 return true; 458 } 459 if (Math.abs((int) event.getX() - mDragStartX) < slop 460 && Math.abs((int) event.getY() - mDragStartY) < slop) { 461 // If the user has not scrolled further than slop, we should not 462 // send the drag. Instead, do nothing, and when the user lifts 463 // their finger, we will change the selection. 464 return true; 465 } 466 if (mWebView != null) { 467 // Only want to set the initial state once. 468 if (!mDragSent) { 469 mWebView.initiateTextFieldDrag(mDragStartX, mDragStartY, 470 mDragStartTime); 471 mDragSent = true; 472 } 473 boolean scrolled = mWebView.textFieldDrag(event); 474 if (scrolled) { 475 mScrolled = true; 476 cancelLongPress(); 477 return true; 478 } 479 } 480 return false; 481 case MotionEvent.ACTION_UP: 482 case MotionEvent.ACTION_CANCEL: 483 if (!mScrolled) { 484 // If the page scrolled, or the TextView scrolled, we do not 485 // want to change the selection 486 cancelLongPress(); 487 if (mGotTouchDown && mWebView != null) { 488 mWebView.touchUpOnTextField(event); 489 } 490 } 491 // Necessary for the WebView to reset its state 492 if (mWebView != null && mDragSent) { 493 mWebView.onTouchEvent(event); 494 } 495 mGotTouchDown = false; 496 break; 497 default: 498 break; 499 } 500 return true; 501 } 502 503 @Override 504 public boolean onTrackballEvent(MotionEvent event) { 505 if (isPopupShowing()) { 506 return super.onTrackballEvent(event); 507 } 508 if (event.getAction() != MotionEvent.ACTION_MOVE) { 509 return false; 510 } 511 // If the Cursor is not on the text input, webview should handle the 512 // trackball 513 if (!mWebView.nativeCursorMatchesFocus()) { 514 return mWebView.onTrackballEvent(event); 515 } 516 Spannable text = (Spannable) getText(); 517 MovementMethod move = getMovementMethod(); 518 if (move != null && getLayout() != null && 519 move.onTrackballEvent(this, text, event)) { 520 // Selection is changed in onSelectionChanged 521 return true; 522 } 523 return false; 524 } 525 526 /** 527 * Remove this WebTextView from its host WebView, and return 528 * focus to the host. 529 */ 530 /* package */ void remove() { 531 // hide the soft keyboard when the edit text is out of focus 532 InputMethodManager.getInstance(mContext).hideSoftInputFromWindow( 533 getWindowToken(), 0); 534 mWebView.removeView(this); 535 mWebView.requestFocus(); 536 } 537 538 /* package */ void bringIntoView() { 539 if (getLayout() != null) { 540 bringPointIntoView(Selection.getSelectionEnd(getText())); 541 } 542 } 543 544 /** 545 * Send the DOM events for the specified event. 546 * @param event KeyEvent to be translated into a DOM event. 547 */ 548 private void sendDomEvent(KeyEvent event) { 549 mWebView.passToJavaScript(getText().toString(), event); 550 } 551 552 /** 553 * Always use this instead of setAdapter, as this has features specific to 554 * the WebTextView. 555 */ 556 public void setAdapterCustom(AutoCompleteAdapter adapter) { 557 if (adapter != null) { 558 setInputType(EditorInfo.TYPE_TEXT_FLAG_AUTO_COMPLETE); 559 adapter.setTextView(this); 560 } 561 super.setAdapter(adapter); 562 } 563 564 /** 565 * This is a special version of ArrayAdapter which changes its text size 566 * to match the text size of its host TextView. 567 */ 568 public static class AutoCompleteAdapter extends ArrayAdapter<String> { 569 private TextView mTextView; 570 571 public AutoCompleteAdapter(Context context, ArrayList<String> entries) { 572 super(context, com.android.internal.R.layout 573 .search_dropdown_item_1line, entries); 574 } 575 576 /** 577 * {@inheritDoc} 578 */ 579 public View getView(int position, View convertView, ViewGroup parent) { 580 TextView tv = 581 (TextView) super.getView(position, convertView, parent); 582 if (tv != null && mTextView != null) { 583 tv.setTextSize(mTextView.getTextSize()); 584 } 585 return tv; 586 } 587 588 /** 589 * Set the TextView so we can match its text size. 590 */ 591 private void setTextView(TextView tv) { 592 mTextView = tv; 593 } 594 } 595 596 /** 597 * Determine whether to use the system-wide password disguising method, 598 * or to use none. 599 * @param inPassword True if the textfield is a password field. 600 */ 601 /* package */ void setInPassword(boolean inPassword) { 602 if (inPassword) { 603 setInputType(EditorInfo.TYPE_CLASS_TEXT | EditorInfo. 604 TYPE_TEXT_VARIATION_PASSWORD); 605 createBackground(); 606 } 607 // For password fields, draw the WebTextView. For others, just show 608 // webkit's drawing. 609 setWillNotDraw(!inPassword); 610 setBackgroundDrawable(inPassword ? mBackground : null); 611 // For non-password fields, avoid the invals from TextView's blinking 612 // cursor 613 setCursorVisible(inPassword); 614 } 615 616 /** 617 * Private class used for the background of a password textfield. 618 */ 619 private static class OutlineDrawable extends Drawable { 620 public void draw(Canvas canvas) { 621 Rect bounds = getBounds(); 622 Paint paint = new Paint(); 623 paint.setAntiAlias(true); 624 // Draw the background. 625 paint.setColor(Color.WHITE); 626 canvas.drawRect(bounds, paint); 627 // Draw the outline. 628 paint.setStyle(Paint.Style.STROKE); 629 paint.setColor(Color.BLACK); 630 canvas.drawRect(bounds, paint); 631 } 632 // Always want it to be opaque. 633 public int getOpacity() { 634 return PixelFormat.OPAQUE; 635 } 636 // These are needed because they are abstract in Drawable. 637 public void setAlpha(int alpha) { } 638 public void setColorFilter(ColorFilter cf) { } 639 } 640 641 /** 642 * Create a background for the WebTextView and set up the paint for drawing 643 * the text. This way, we can see the password transformation of the 644 * system, which (optionally) shows the actual text before changing to dots. 645 * The background is necessary to hide the webkit-drawn text beneath. 646 */ 647 private void createBackground() { 648 if (mBackground != null) { 649 return; 650 } 651 mBackground = new OutlineDrawable(); 652 653 setGravity(Gravity.CENTER_VERTICAL); 654 // Turn on subpixel text, and turn off kerning, so it better matches 655 // the text in webkit. 656 TextPaint paint = getPaint(); 657 int flags = paint.getFlags() | Paint.SUBPIXEL_TEXT_FLAG | 658 Paint.ANTI_ALIAS_FLAG & ~Paint.DEV_KERN_TEXT_FLAG; 659 paint.setFlags(flags); 660 // Set the text color to black, regardless of the theme. This ensures 661 // that other applications that use embedded WebViews will properly 662 // display the text in password textfields. 663 setTextColor(Color.BLACK); 664 } 665 666 /* package */ void setMaxLength(int maxLength) { 667 mMaxLength = maxLength; 668 if (-1 == maxLength) { 669 setFilters(NO_FILTERS); 670 } else { 671 setFilters(new InputFilter[] { 672 new InputFilter.LengthFilter(maxLength) }); 673 } 674 } 675 676 /** 677 * Set the pointer for this node so it can be determined which node this 678 * WebTextView represents. 679 * @param ptr Integer representing the pointer to the node which this 680 * WebTextView represents. 681 */ 682 /* package */ void setNodePointer(int ptr) { 683 mNodePointer = ptr; 684 } 685 686 /** 687 * Determine the position and size of WebTextView, and add it to the 688 * WebView's view heirarchy. All parameters are presumed to be in 689 * view coordinates. Also requests Focus and sets the cursor to not 690 * request to be in view. 691 * @param x x-position of the textfield. 692 * @param y y-position of the textfield. 693 * @param width width of the textfield. 694 * @param height height of the textfield. 695 */ 696 /* package */ void setRect(int x, int y, int width, int height) { 697 LayoutParams lp = (LayoutParams) getLayoutParams(); 698 if (null == lp) { 699 lp = new LayoutParams(width, height, x, y); 700 } else { 701 lp.x = x; 702 lp.y = y; 703 lp.width = width; 704 lp.height = height; 705 } 706 if (getParent() == null) { 707 mWebView.addView(this, lp); 708 } else { 709 setLayoutParams(lp); 710 } 711 // Set up a measure spec so a layout can always be recreated. 712 mWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY); 713 mHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY); 714 requestFocus(); 715 } 716 717 /** 718 * Set the selection, and disable our onSelectionChanged action. 719 */ 720 /* package */ void setSelectionFromWebKit(int start, int end) { 721 if (start < 0 || end < 0) return; 722 Spannable text = (Spannable) getText(); 723 int length = text.length(); 724 if (start > length || end > length) return; 725 mFromWebKit = true; 726 Selection.setSelection(text, start, end); 727 mFromWebKit = false; 728 } 729 730 /** 731 * Set whether this is a single-line textfield or a multi-line textarea. 732 * Textfields scroll horizontally, and do not handle the enter key. 733 * Textareas behave oppositely. 734 * Do NOT call this after calling setInPassword(true). This will result in 735 * removing the password input type. 736 */ 737 public void setSingleLine(boolean single) { 738 int inputType = EditorInfo.TYPE_CLASS_TEXT 739 | EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT; 740 if (single) { 741 int action = mWebView.nativeTextFieldAction(); 742 switch (action) { 743 // Keep in sync with CachedRoot::ImeAction 744 case 0: // NEXT 745 setImeOptions(EditorInfo.IME_ACTION_NEXT); 746 break; 747 case 1: // GO 748 setImeOptions(EditorInfo.IME_ACTION_GO); 749 break; 750 case -1: // FAILURE 751 case 2: // DONE 752 setImeOptions(EditorInfo.IME_ACTION_DONE); 753 break; 754 } 755 } else { 756 inputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE 757 | EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES 758 | EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT; 759 setImeOptions(EditorInfo.IME_ACTION_NONE); 760 } 761 mSingle = single; 762 setHorizontallyScrolling(single); 763 setInputType(inputType); 764 } 765 766 /** 767 * Set the text for this WebTextView, and set the selection to (start, end) 768 * @param text Text to go into this WebTextView. 769 * @param start Beginning of the selection. 770 * @param end End of the selection. 771 */ 772 /* package */ void setText(CharSequence text, int start, int end) { 773 mPreChange = text.toString(); 774 setText(text); 775 Spannable span = (Spannable) getText(); 776 int length = span.length(); 777 if (end > length) { 778 end = length; 779 } 780 if (start < 0) { 781 start = 0; 782 } else if (start > length) { 783 start = length; 784 } 785 if (DebugFlags.WEB_TEXT_VIEW) { 786 Log.v(LOGTAG, "setText start=" + start 787 + " end=" + end); 788 } 789 Selection.setSelection(span, start, end); 790 } 791 792 /** 793 * Set the text to the new string, but use the old selection, making sure 794 * to keep it within the new string. 795 * @param text The new text to place in the textfield. 796 */ 797 /* package */ void setTextAndKeepSelection(String text) { 798 mPreChange = text.toString(); 799 Editable edit = (Editable) getText(); 800 mInSetTextAndKeepSelection = true; 801 edit.replace(0, edit.length(), text); 802 mInSetTextAndKeepSelection = false; 803 updateCachedTextfield(); 804 } 805 806 /** 807 * Update the cache to reflect the current text. 808 */ 809 /* package */ void updateCachedTextfield() { 810 mWebView.updateCachedTextfield(getText().toString()); 811 } 812 813 @Override 814 public boolean requestRectangleOnScreen(Rect rectangle) { 815 // don't scroll while in zoom animation. When it is done, we will adjust 816 // the WebTextView if it is in editing mode. 817 if (!mWebView.inAnimateZoom()) { 818 return super.requestRectangleOnScreen(rectangle); 819 } 820 return false; 821 } 822} 823