WebTextView.java revision aa7b9d78262b1df07a98bcf725958d418ff12ede
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 any time the WebTextView has focus, but the navigation 88 // cache does not yet know that the focus has been changed. This happens 89 // if the user presses "Next", if the user moves the cursor to a textfield 90 // and starts typing or clicks the trackball/center key, and when the user 91 // touches a textfield. 92 boolean mOkayForFocusNotToMatch; 93 // Whether or not a selection change was generated from webkit. If it was, 94 // we do not need to pass the selection back to webkit. 95 private boolean mFromWebKit; 96 // Whether or not a selection change was generated from the WebTextView 97 // gaining focus. If it is, we do not want to pass it to webkit. This 98 // selection comes from the MovementMethod, but we behave differently. If 99 // WebTextView gained focus from a touch, webkit will determine the 100 // selection. 101 private boolean mFromFocusChange; 102 // Whether or not a selection change was generated from setInputType. We 103 // do not want to pass this change to webkit. 104 private boolean mFromSetInputType; 105 private boolean mGotTouchDown; 106 // Keep track of whether a long press has happened. Only meaningful after 107 // an ACTION_DOWN MotionEvent 108 private boolean mHasPerformedLongClick; 109 private boolean mInSetTextAndKeepSelection; 110 // Array to store the final character added in onTextChanged, so that its 111 // KeyEvents may be determined. 112 private char[] mCharacter = new char[1]; 113 // This is used to reset the length filter when on a textfield 114 // with no max length. 115 // FIXME: This can be replaced with TextView.NO_FILTERS if that 116 // is made public/protected. 117 private static final InputFilter[] NO_FILTERS = new InputFilter[0]; 118 119 /** 120 * Create a new WebTextView. 121 * @param context The Context for this WebTextView. 122 * @param webView The WebView that created this. 123 */ 124 /* package */ WebTextView(Context context, WebView webView) { 125 super(context); 126 mWebView = webView; 127 mMaxLength = -1; 128 } 129 130 @Override 131 public boolean dispatchKeyEvent(KeyEvent event) { 132 if (event.isSystem()) { 133 return super.dispatchKeyEvent(event); 134 } 135 // Treat ACTION_DOWN and ACTION MULTIPLE the same 136 boolean down = event.getAction() != KeyEvent.ACTION_UP; 137 int keyCode = event.getKeyCode(); 138 139 boolean isArrowKey = false; 140 switch(keyCode) { 141 case KeyEvent.KEYCODE_DPAD_LEFT: 142 case KeyEvent.KEYCODE_DPAD_RIGHT: 143 case KeyEvent.KEYCODE_DPAD_UP: 144 case KeyEvent.KEYCODE_DPAD_DOWN: 145 if (!mWebView.nativeCursorMatchesFocus()) { 146 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 147 .onKeyUp(keyCode, event); 148 149 } 150 isArrowKey = true; 151 break; 152 } 153 154 if (down) { 155 if (mOkayForFocusNotToMatch) { 156 if (mWebView.nativeFocusNodePointer() == mNodePointer) { 157 mOkayForFocusNotToMatch = false; 158 } 159 } else if (mWebView.nativeFocusNodePointer() != mNodePointer 160 && !isArrowKey) { 161 mWebView.nativeClearCursor(); 162 // Do not call remove() here, which hides the soft keyboard. If 163 // the soft keyboard is being displayed, the user will still want 164 // it there. 165 mWebView.removeView(this); 166 mWebView.requestFocus(); 167 return mWebView.dispatchKeyEvent(event); 168 } 169 } 170 Spannable text = (Spannable) getText(); 171 int oldLength = text.length(); 172 // Normally the delete key's dom events are sent via onTextChanged. 173 // However, if the length is zero, the text did not change, so we 174 // go ahead and pass the key down immediately. 175 if (KeyEvent.KEYCODE_DEL == keyCode && 0 == oldLength) { 176 sendDomEvent(event); 177 return true; 178 } 179 180 if ((mSingle && KeyEvent.KEYCODE_ENTER == keyCode)) { 181 if (isPopupShowing()) { 182 return super.dispatchKeyEvent(event); 183 } 184 if (!down) { 185 // Hide the keyboard, since the user has just submitted this 186 // form. The submission happens thanks to the two calls 187 // to sendDomEvent. 188 InputMethodManager.getInstance(mContext) 189 .hideSoftInputFromWindow(getWindowToken(), 0); 190 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, keyCode)); 191 sendDomEvent(event); 192 } 193 return super.dispatchKeyEvent(event); 194 } else if (KeyEvent.KEYCODE_DPAD_CENTER == keyCode) { 195 // Note that this handles center key and trackball. 196 if (isPopupShowing()) { 197 return super.dispatchKeyEvent(event); 198 } 199 if (!mWebView.nativeCursorMatchesFocus()) { 200 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 201 .onKeyUp(keyCode, event); 202 } 203 // Center key should be passed to a potential onClick 204 if (!down) { 205 mWebView.centerKeyPressOnTextField(); 206 } 207 // Pass to super to handle longpress. 208 return super.dispatchKeyEvent(event); 209 } 210 211 // Ensure there is a layout so arrow keys are handled properly. 212 if (getLayout() == null) { 213 measure(mWidthSpec, mHeightSpec); 214 } 215 int oldStart = Selection.getSelectionStart(text); 216 int oldEnd = Selection.getSelectionEnd(text); 217 218 boolean maxedOut = mMaxLength != -1 && oldLength == mMaxLength; 219 // If we are at max length, and there is a selection rather than a 220 // cursor, we need to store the text to compare later, since the key 221 // may have changed the string. 222 String oldText; 223 if (maxedOut && oldEnd != oldStart) { 224 oldText = text.toString(); 225 } else { 226 oldText = ""; 227 } 228 if (super.dispatchKeyEvent(event)) { 229 // If the WebTextView handled the key it was either an alphanumeric 230 // key, a delete, or a movement within the text. All of those are 231 // ok to pass to javascript. 232 233 // UNLESS there is a max length determined by the html. In that 234 // case, if the string was already at the max length, an 235 // alphanumeric key will be erased by the LengthFilter, 236 // so do not pass down to javascript, and instead 237 // return true. If it is an arrow key or a delete key, we can go 238 // ahead and pass it down. 239 if (KeyEvent.KEYCODE_ENTER == keyCode) { 240 // For multi-line text boxes, newlines will 241 // trigger onTextChanged for key down (which will send both 242 // key up and key down) but not key up. 243 mGotEnterDown = true; 244 } 245 if (maxedOut && !isArrowKey && keyCode != KeyEvent.KEYCODE_DEL) { 246 if (oldEnd == oldStart) { 247 // Return true so the key gets dropped. 248 return true; 249 } else if (!oldText.equals(getText().toString())) { 250 // FIXME: This makes the text work properly, but it 251 // does not pass down the key event, so it may not 252 // work for a textfield that has the type of 253 // behavior of GoogleSuggest. That said, it is 254 // unlikely that a site would combine the two in 255 // one textfield. 256 Spannable span = (Spannable) getText(); 257 int newStart = Selection.getSelectionStart(span); 258 int newEnd = Selection.getSelectionEnd(span); 259 mWebView.replaceTextfieldText(0, oldLength, span.toString(), 260 newStart, newEnd); 261 return true; 262 } 263 } 264 /* FIXME: 265 * In theory, we would like to send the events for the arrow keys. 266 * However, the TextView can arbitrarily change the selection (i.e. 267 * long press followed by using the trackball). Therefore, we keep 268 * in sync with the TextView via onSelectionChanged. If we also 269 * send the DOM event, we lose the correct selection. 270 if (isArrowKey) { 271 // Arrow key does not change the text, but we still want to send 272 // the DOM events. 273 sendDomEvent(event); 274 } 275 */ 276 return true; 277 } 278 // Ignore the key up event for newlines. This prevents 279 // multiple newlines in the native textarea. 280 if (mGotEnterDown && !down) { 281 return true; 282 } 283 // if it is a navigation key, pass it to WebView 284 if (isArrowKey) { 285 // WebView check the trackballtime in onKeyDown to avoid calling 286 // native from both trackball and key handling. As this is called 287 // from WebTextView, we always want WebView to check with native. 288 // Reset trackballtime to ensure it. 289 mWebView.resetTrackballTime(); 290 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 291 .onKeyUp(keyCode, event); 292 } 293 return false; 294 } 295 296 /** 297 * Determine whether this WebTextView currently represents the node 298 * represented by ptr. 299 * @param ptr Pointer to a node to compare to. 300 * @return boolean Whether this WebTextView already represents the node 301 * pointed to by ptr. 302 */ 303 /* package */ boolean isSameTextField(int ptr) { 304 return ptr == mNodePointer; 305 } 306 307 @Override public InputConnection onCreateInputConnection( 308 EditorInfo outAttrs) { 309 InputConnection connection = super.onCreateInputConnection(outAttrs); 310 if (mWebView != null) { 311 // Use the name of the textfield + the url. Use backslash as an 312 // arbitrary separator. 313 outAttrs.fieldName = mWebView.nativeFocusCandidateName() + "\\" 314 + mWebView.getUrl(); 315 } 316 return connection; 317 } 318 319 @Override 320 public void onEditorAction(int actionCode) { 321 switch (actionCode) { 322 case EditorInfo.IME_ACTION_NEXT: 323 // Since the cursor will no longer be in the same place as the 324 // focus, set the focus controller back to inactive 325 mWebView.setFocusControllerInactive(); 326 mWebView.nativeMoveCursorToNextTextInput(); 327 mOkayForFocusNotToMatch = true; 328 // Pass the click to set the focus to the textfield which will now 329 // have the cursor. 330 mWebView.centerKeyPressOnTextField(); 331 // Preemptively rebuild the WebTextView, so that the action will 332 // be set properly. 333 mWebView.rebuildWebTextView(); 334 setDefaultSelection(); 335 mWebView.invalidate(); 336 break; 337 case EditorInfo.IME_ACTION_DONE: 338 super.onEditorAction(actionCode); 339 break; 340 case EditorInfo.IME_ACTION_GO: 341 case EditorInfo.IME_ACTION_SEARCH: 342 // Send an enter and hide the soft keyboard 343 InputMethodManager.getInstance(mContext) 344 .hideSoftInputFromWindow(getWindowToken(), 0); 345 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 346 KeyEvent.KEYCODE_ENTER)); 347 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 348 KeyEvent.KEYCODE_ENTER)); 349 350 default: 351 break; 352 } 353 } 354 355 @Override 356 protected void onFocusChanged(boolean focused, int direction, 357 Rect previouslyFocusedRect) { 358 mFromFocusChange = true; 359 super.onFocusChanged(focused, direction, previouslyFocusedRect); 360 mFromFocusChange = false; 361 } 362 363 @Override 364 protected void onSelectionChanged(int selStart, int selEnd) { 365 // This code is copied from TextView.onDraw(). That code does not get 366 // executed, however, because the WebTextView does not draw, allowing 367 // webkit's drawing to show through. 368 InputMethodManager imm = InputMethodManager.peekInstance(); 369 if (imm != null && imm.isActive(this)) { 370 Spannable sp = (Spannable) getText(); 371 int candStart = EditableInputConnection.getComposingSpanStart(sp); 372 int candEnd = EditableInputConnection.getComposingSpanEnd(sp); 373 imm.updateSelection(this, selStart, selEnd, candStart, candEnd); 374 } 375 if (!mFromWebKit && !mFromFocusChange && !mFromSetInputType 376 && mWebView != null) { 377 if (DebugFlags.WEB_TEXT_VIEW) { 378 Log.v(LOGTAG, "onSelectionChanged selStart=" + selStart 379 + " selEnd=" + selEnd); 380 } 381 mWebView.setSelection(selStart, selEnd); 382 } 383 } 384 385 @Override 386 protected void onTextChanged(CharSequence s,int start,int before,int count){ 387 super.onTextChanged(s, start, before, count); 388 String postChange = s.toString(); 389 // Prevent calls to setText from invoking onTextChanged (since this will 390 // mean we are on a different textfield). Also prevent the change when 391 // going from a textfield with a string of text to one with a smaller 392 // limit on text length from registering the onTextChanged event. 393 if (mPreChange == null || mPreChange.equals(postChange) || 394 (mMaxLength > -1 && mPreChange.length() > mMaxLength && 395 mPreChange.substring(0, mMaxLength).equals(postChange))) { 396 return; 397 } 398 mPreChange = postChange; 399 // This was simply a delete or a cut, so just delete the selection. 400 if (before > 0 && 0 == count) { 401 mWebView.deleteSelection(start, start + before); 402 // For this and all changes to the text, update our cache 403 updateCachedTextfield(); 404 return; 405 } 406 // Find the last character being replaced. If it can be represented by 407 // events, we will pass them to native (after replacing the beginning 408 // of the changed text), so we can see javascript events. 409 // Otherwise, replace the text being changed (including the last 410 // character) in the textfield. 411 TextUtils.getChars(s, start + count - 1, start + count, mCharacter, 0); 412 KeyCharacterMap kmap = 413 KeyCharacterMap.load(KeyCharacterMap.BUILT_IN_KEYBOARD); 414 KeyEvent[] events = kmap.getEvents(mCharacter); 415 boolean cannotUseKeyEvents = null == events; 416 int charactersFromKeyEvents = cannotUseKeyEvents ? 0 : 1; 417 if (count > 1 || cannotUseKeyEvents) { 418 String replace = s.subSequence(start, 419 start + count - charactersFromKeyEvents).toString(); 420 mWebView.replaceTextfieldText(start, start + before, replace, 421 start + count - charactersFromKeyEvents, 422 start + count - charactersFromKeyEvents); 423 } else { 424 // This corrects the selection which may have been affected by the 425 // trackball or auto-correct. 426 if (DebugFlags.WEB_TEXT_VIEW) { 427 Log.v(LOGTAG, "onTextChanged start=" + start 428 + " start + before=" + (start + before)); 429 } 430 if (!mInSetTextAndKeepSelection) { 431 mWebView.setSelection(start, start + before); 432 } 433 } 434 if (!cannotUseKeyEvents) { 435 int length = events.length; 436 for (int i = 0; i < length; i++) { 437 // We never send modifier keys to native code so don't send them 438 // here either. 439 if (!KeyEvent.isModifierKey(events[i].getKeyCode())) { 440 sendDomEvent(events[i]); 441 } 442 } 443 } 444 updateCachedTextfield(); 445 } 446 447 @Override 448 public boolean onTouchEvent(MotionEvent event) { 449 switch (event.getAction()) { 450 case MotionEvent.ACTION_DOWN: 451 super.onTouchEvent(event); 452 // This event may be the start of a drag, so store it to pass to the 453 // WebView if it is. 454 mDragStartX = event.getX(); 455 mDragStartY = event.getY(); 456 mDragStartTime = event.getEventTime(); 457 mDragSent = false; 458 mScrolled = false; 459 mGotTouchDown = true; 460 mHasPerformedLongClick = false; 461 break; 462 case MotionEvent.ACTION_MOVE: 463 if (mHasPerformedLongClick) { 464 mGotTouchDown = false; 465 return false; 466 } 467 int slop = ViewConfiguration.get(mContext).getScaledTouchSlop(); 468 Spannable buffer = getText(); 469 int initialScrollX = Touch.getInitialScrollX(this, buffer); 470 int initialScrollY = Touch.getInitialScrollY(this, buffer); 471 super.onTouchEvent(event); 472 int dx = Math.abs(mScrollX - initialScrollX); 473 int dy = Math.abs(mScrollY - initialScrollY); 474 // Use a smaller slop when checking to see if we've moved far enough 475 // to scroll the text, because experimentally, slop has shown to be 476 // to big for the case of a small textfield. 477 int smallerSlop = slop/2; 478 if (dx > smallerSlop || dy > smallerSlop) { 479 if (mWebView != null) { 480 float maxScrollX = (float) Touch.getMaxScrollX(this, 481 getLayout(), mScrollY); 482 if (DebugFlags.WEB_TEXT_VIEW) { 483 Log.v(LOGTAG, "onTouchEvent x=" + mScrollX + " y=" 484 + mScrollY + " maxX=" + maxScrollX); 485 } 486 mWebView.scrollFocusedTextInput(maxScrollX > 0 ? 487 mScrollX / maxScrollX : 0, mScrollY); 488 } 489 mScrolled = true; 490 cancelLongPress(); 491 return true; 492 } 493 if (Math.abs((int) event.getX() - mDragStartX) < slop 494 && Math.abs((int) event.getY() - mDragStartY) < slop) { 495 // If the user has not scrolled further than slop, we should not 496 // send the drag. Instead, do nothing, and when the user lifts 497 // their finger, we will change the selection. 498 return true; 499 } 500 if (mWebView != null) { 501 // Only want to set the initial state once. 502 if (!mDragSent) { 503 mWebView.initiateTextFieldDrag(mDragStartX, mDragStartY, 504 mDragStartTime); 505 mDragSent = true; 506 } 507 boolean scrolled = mWebView.textFieldDrag(event); 508 if (scrolled) { 509 mScrolled = true; 510 cancelLongPress(); 511 return true; 512 } 513 } 514 return false; 515 case MotionEvent.ACTION_UP: 516 case MotionEvent.ACTION_CANCEL: 517 if (mHasPerformedLongClick) { 518 mGotTouchDown = false; 519 return false; 520 } 521 if (!mScrolled) { 522 // If the page scrolled, or the TextView scrolled, we do not 523 // want to change the selection 524 cancelLongPress(); 525 if (mGotTouchDown && mWebView != null) { 526 mWebView.touchUpOnTextField(event); 527 } 528 } 529 // Necessary for the WebView to reset its state 530 if (mWebView != null && mDragSent) { 531 mWebView.onTouchEvent(event); 532 } 533 mGotTouchDown = false; 534 break; 535 default: 536 break; 537 } 538 return true; 539 } 540 541 @Override 542 public boolean onTrackballEvent(MotionEvent event) { 543 if (isPopupShowing()) { 544 return super.onTrackballEvent(event); 545 } 546 if (event.getAction() != MotionEvent.ACTION_MOVE) { 547 return false; 548 } 549 // If the Cursor is not on the text input, webview should handle the 550 // trackball 551 if (!mWebView.nativeCursorMatchesFocus()) { 552 return mWebView.onTrackballEvent(event); 553 } 554 Spannable text = (Spannable) getText(); 555 MovementMethod move = getMovementMethod(); 556 if (move != null && getLayout() != null && 557 move.onTrackballEvent(this, text, event)) { 558 // Selection is changed in onSelectionChanged 559 return true; 560 } 561 return false; 562 } 563 564 @Override 565 public boolean performLongClick() { 566 mHasPerformedLongClick = true; 567 return super.performLongClick(); 568 } 569 570 /** 571 * Remove this WebTextView from its host WebView, and return 572 * focus to the host. 573 */ 574 /* package */ void remove() { 575 // hide the soft keyboard when the edit text is out of focus 576 InputMethodManager.getInstance(mContext).hideSoftInputFromWindow( 577 getWindowToken(), 0); 578 mWebView.removeView(this); 579 mWebView.requestFocus(); 580 } 581 582 /* package */ void bringIntoView() { 583 if (getLayout() != null) { 584 bringPointIntoView(Selection.getSelectionEnd(getText())); 585 } 586 } 587 588 /** 589 * Send the DOM events for the specified event. 590 * @param event KeyEvent to be translated into a DOM event. 591 */ 592 private void sendDomEvent(KeyEvent event) { 593 mWebView.passToJavaScript(getText().toString(), event); 594 } 595 596 /** 597 * Always use this instead of setAdapter, as this has features specific to 598 * the WebTextView. 599 */ 600 public void setAdapterCustom(AutoCompleteAdapter adapter) { 601 if (adapter != null) { 602 setInputType(getInputType() 603 | EditorInfo.TYPE_TEXT_FLAG_AUTO_COMPLETE); 604 adapter.setTextView(this); 605 } 606 super.setAdapter(adapter); 607 } 608 609 /** 610 * This is a special version of ArrayAdapter which changes its text size 611 * to match the text size of its host TextView. 612 */ 613 public static class AutoCompleteAdapter extends ArrayAdapter<String> { 614 private TextView mTextView; 615 616 public AutoCompleteAdapter(Context context, ArrayList<String> entries) { 617 super(context, com.android.internal.R.layout 618 .search_dropdown_item_1line, entries); 619 } 620 621 /** 622 * {@inheritDoc} 623 */ 624 public View getView(int position, View convertView, ViewGroup parent) { 625 TextView tv = 626 (TextView) super.getView(position, convertView, parent); 627 if (tv != null && mTextView != null) { 628 tv.setTextSize(mTextView.getTextSize()); 629 } 630 return tv; 631 } 632 633 /** 634 * Set the TextView so we can match its text size. 635 */ 636 private void setTextView(TextView tv) { 637 mTextView = tv; 638 } 639 } 640 641 /** 642 * Sets the selection when the user clicks on a textfield or textarea with 643 * the trackball or center key, or starts typing into it without clicking on 644 * it. 645 */ 646 /* package */ void setDefaultSelection() { 647 Spannable text = (Spannable) getText(); 648 int selection = mSingle ? text.length() : 0; 649 if (Selection.getSelectionStart(text) == selection 650 && Selection.getSelectionEnd(text) == selection) { 651 // The selection of the UI copy is set correctly, but the 652 // WebTextView still needs to inform the webkit thread to set the 653 // selection. Normally that is done in onSelectionChanged, but 654 // onSelectionChanged will not be called because the UI copy is not 655 // changing. (This can happen when the WebTextView takes focus. 656 // That onSelectionChanged was blocked because the selection set 657 // when focusing is not necessarily the desirable selection for 658 // WebTextView.) 659 if (mWebView != null) { 660 mWebView.setSelection(selection, selection); 661 } 662 } else { 663 Selection.setSelection(text, selection, selection); 664 } 665 } 666 667 /** 668 * Determine whether to use the system-wide password disguising method, 669 * or to use none. 670 * @param inPassword True if the textfield is a password field. 671 */ 672 /* package */ void setInPassword(boolean inPassword) { 673 if (inPassword) { 674 setInputType(EditorInfo.TYPE_CLASS_TEXT | EditorInfo. 675 TYPE_TEXT_VARIATION_PASSWORD); 676 createBackground(); 677 } 678 // For password fields, draw the WebTextView. For others, just show 679 // webkit's drawing. 680 setWillNotDraw(!inPassword); 681 setBackgroundDrawable(inPassword ? mBackground : null); 682 // For non-password fields, avoid the invals from TextView's blinking 683 // cursor 684 setCursorVisible(inPassword); 685 } 686 687 /** 688 * Private class used for the background of a password textfield. 689 */ 690 private static class OutlineDrawable extends Drawable { 691 public void draw(Canvas canvas) { 692 Rect bounds = getBounds(); 693 Paint paint = new Paint(); 694 paint.setAntiAlias(true); 695 // Draw the background. 696 paint.setColor(Color.WHITE); 697 canvas.drawRect(bounds, paint); 698 // Draw the outline. 699 paint.setStyle(Paint.Style.STROKE); 700 paint.setColor(Color.BLACK); 701 canvas.drawRect(bounds, paint); 702 } 703 // Always want it to be opaque. 704 public int getOpacity() { 705 return PixelFormat.OPAQUE; 706 } 707 // These are needed because they are abstract in Drawable. 708 public void setAlpha(int alpha) { } 709 public void setColorFilter(ColorFilter cf) { } 710 } 711 712 /** 713 * Create a background for the WebTextView and set up the paint for drawing 714 * the text. This way, we can see the password transformation of the 715 * system, which (optionally) shows the actual text before changing to dots. 716 * The background is necessary to hide the webkit-drawn text beneath. 717 */ 718 private void createBackground() { 719 if (mBackground != null) { 720 return; 721 } 722 mBackground = new OutlineDrawable(); 723 724 setGravity(Gravity.CENTER_VERTICAL); 725 // Turn on subpixel text, and turn off kerning, so it better matches 726 // the text in webkit. 727 TextPaint paint = getPaint(); 728 int flags = paint.getFlags() | Paint.SUBPIXEL_TEXT_FLAG | 729 Paint.ANTI_ALIAS_FLAG & ~Paint.DEV_KERN_TEXT_FLAG; 730 paint.setFlags(flags); 731 // Set the text color to black, regardless of the theme. This ensures 732 // that other applications that use embedded WebViews will properly 733 // display the text in password textfields. 734 setTextColor(Color.BLACK); 735 } 736 737 @Override 738 public void setInputType(int type) { 739 mFromSetInputType = true; 740 super.setInputType(type); 741 mFromSetInputType = false; 742 } 743 744 private void setMaxLength(int maxLength) { 745 mMaxLength = maxLength; 746 if (-1 == maxLength) { 747 setFilters(NO_FILTERS); 748 } else { 749 setFilters(new InputFilter[] { 750 new InputFilter.LengthFilter(maxLength) }); 751 } 752 } 753 754 /** 755 * Set the pointer for this node so it can be determined which node this 756 * WebTextView represents. 757 * @param ptr Integer representing the pointer to the node which this 758 * WebTextView represents. 759 */ 760 /* package */ void setNodePointer(int ptr) { 761 mNodePointer = ptr; 762 } 763 764 /** 765 * Determine the position and size of WebTextView, and add it to the 766 * WebView's view heirarchy. All parameters are presumed to be in 767 * view coordinates. Also requests Focus and sets the cursor to not 768 * request to be in view. 769 * @param x x-position of the textfield. 770 * @param y y-position of the textfield. 771 * @param width width of the textfield. 772 * @param height height of the textfield. 773 */ 774 /* package */ void setRect(int x, int y, int width, int height) { 775 LayoutParams lp = (LayoutParams) getLayoutParams(); 776 if (null == lp) { 777 lp = new LayoutParams(width, height, x, y); 778 } else { 779 lp.x = x; 780 lp.y = y; 781 lp.width = width; 782 lp.height = height; 783 } 784 if (getParent() == null) { 785 mWebView.addView(this, lp); 786 } else { 787 setLayoutParams(lp); 788 } 789 // Set up a measure spec so a layout can always be recreated. 790 mWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY); 791 mHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY); 792 requestFocus(); 793 } 794 795 /** 796 * Set the selection, and disable our onSelectionChanged action. 797 */ 798 /* package */ void setSelectionFromWebKit(int start, int end) { 799 if (start < 0 || end < 0) return; 800 Spannable text = (Spannable) getText(); 801 int length = text.length(); 802 if (start > length || end > length) return; 803 mFromWebKit = true; 804 Selection.setSelection(text, start, end); 805 mFromWebKit = false; 806 } 807 808 /** 809 * Set the text to the new string, but use the old selection, making sure 810 * to keep it within the new string. 811 * @param text The new text to place in the textfield. 812 */ 813 /* package */ void setTextAndKeepSelection(String text) { 814 mPreChange = text.toString(); 815 Editable edit = (Editable) getText(); 816 mInSetTextAndKeepSelection = true; 817 edit.replace(0, edit.length(), text); 818 mInSetTextAndKeepSelection = false; 819 updateCachedTextfield(); 820 } 821 822 /** 823 * Called by WebView.rebuildWebTextView(). Based on the type of the <input> 824 * element, set up the WebTextView, its InputType, and IME Options properly. 825 * @param type int corresponding to enum "type" defined in WebView.cpp. 826 * Does not correspond to HTMLInputElement::InputType so this 827 * is unaffected if that changes, and also because that has no 828 * type corresponding to textarea (which is its own tag). 829 */ 830 /* package */ void setType(int type) { 831 if (mWebView == null) return; 832 boolean single = true; 833 boolean inPassword = false; 834 int maxLength = -1; 835 int inputType = EditorInfo.TYPE_CLASS_TEXT 836 | EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT; 837 switch (type) { 838 case 1: // TEXT_AREA 839 single = false; 840 inputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE 841 | EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES 842 | EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT; 843 setImeOptions(EditorInfo.IME_ACTION_NONE); 844 break; 845 case 2: // PASSWORD 846 inPassword = true; 847 break; 848 case 3: // SEARCH 849 setImeOptions(EditorInfo.IME_ACTION_SEARCH); 850 break; 851 case 4: // EMAIL 852 // TYPE_TEXT_VARIATION_WEB_EDIT_TEXT prevents EMAIL_ADDRESS 853 // from working, so exclude it for now. 854 inputType = EditorInfo.TYPE_CLASS_TEXT 855 | EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS; 856 break; 857 case 5: // NUMBER 858 inputType = EditorInfo.TYPE_CLASS_NUMBER; 859 break; 860 case 6: // TELEPHONE 861 inputType = EditorInfo.TYPE_CLASS_PHONE; 862 break; 863 case 7: // URL 864 // TYPE_TEXT_VARIATION_WEB_EDIT_TEXT prevents URI 865 // from working, so exclude it for now. 866 inputType = EditorInfo.TYPE_CLASS_TEXT 867 | EditorInfo.TYPE_TEXT_VARIATION_URI; 868 break; 869 default: 870 break; 871 } 872 if (single) { 873 maxLength = mWebView.nativeFocusCandidateMaxLength(); 874 if (type != 2 /* PASSWORD */) { 875 String name = mWebView.nativeFocusCandidateName(); 876 if (name != null && name.length() > 0) { 877 mWebView.requestFormData(name, mNodePointer); 878 } 879 } 880 if (type != 3 /* SEARCH */) { 881 int action = mWebView.nativeTextFieldAction(); 882 switch (action) { 883 // Keep in sync with CachedRoot::ImeAction 884 case 0: // NEXT 885 setImeOptions(EditorInfo.IME_ACTION_NEXT); 886 break; 887 case 1: // GO 888 setImeOptions(EditorInfo.IME_ACTION_GO); 889 break; 890 case -1: // FAILURE 891 case 2: // DONE 892 setImeOptions(EditorInfo.IME_ACTION_DONE); 893 break; 894 } 895 } 896 } 897 mSingle = single; 898 setMaxLength(maxLength); 899 setHorizontallyScrolling(single); 900 setInputType(inputType); 901 setInPassword(inPassword); 902 AutoCompleteAdapter adapter = null; 903 setAdapterCustom(adapter); 904 } 905 906 /** 907 * Update the cache to reflect the current text. 908 */ 909 /* package */ void updateCachedTextfield() { 910 mWebView.updateCachedTextfield(getText().toString()); 911 } 912 913 @Override 914 public boolean requestRectangleOnScreen(Rect rectangle) { 915 // don't scroll while in zoom animation. When it is done, we will adjust 916 // the WebTextView if it is in editing mode. 917 if (!mWebView.inAnimateZoom()) { 918 return super.requestRectangleOnScreen(rectangle); 919 } 920 return false; 921 } 922} 923