WebTextView.java revision eb51f3e340d3ddc935367c302167d4b4b706e904
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.Layout; 32import android.text.Selection; 33import android.text.Spannable; 34import android.text.TextPaint; 35import android.text.TextUtils; 36import android.text.method.MovementMethod; 37import android.text.method.Touch; 38import android.util.Log; 39import android.view.Gravity; 40import android.view.KeyCharacterMap; 41import android.view.KeyEvent; 42import android.view.MotionEvent; 43import android.view.View; 44import android.view.ViewConfiguration; 45import android.view.ViewGroup; 46import android.view.inputmethod.EditorInfo; 47import android.view.inputmethod.InputMethodManager; 48import android.view.inputmethod.InputConnection; 49import android.widget.AbsoluteLayout.LayoutParams; 50import android.widget.ArrayAdapter; 51import android.widget.AutoCompleteTextView; 52import android.widget.TextView; 53 54import java.util.ArrayList; 55 56/** 57 * WebTextView is a specialized version of EditText used by WebView 58 * to overlay html textfields (and textareas) to use our standard 59 * text editing. 60 */ 61/* package */ class WebTextView extends AutoCompleteTextView { 62 63 static final String LOGTAG = "webtextview"; 64 65 private WebView mWebView; 66 private boolean mSingle; 67 private int mWidthSpec; 68 private int mHeightSpec; 69 private int mNodePointer; 70 // FIXME: This is a hack for blocking unmatched key ups, in particular 71 // on the enter key. The method for blocking unmatched key ups prevents 72 // the shift key from working properly. 73 private boolean mGotEnterDown; 74 private int mMaxLength; 75 // Keep track of the text before the change so we know whether we actually 76 // need to send down the DOM events. 77 private String mPreChange; 78 private Drawable mBackground; 79 // Variables for keeping track of the touch down, to send to the WebView 80 // when a drag starts 81 private float mDragStartX; 82 private float mDragStartY; 83 private long mDragStartTime; 84 private boolean mDragSent; 85 // True if the most recent drag event has caused either the TextView to 86 // scroll or the web page to scroll. Gets reset after a touch down. 87 private boolean mScrolled; 88 // Whether or not a selection change was generated from webkit. If it was, 89 // we do not need to pass the selection back to webkit. 90 private boolean mFromWebKit; 91 // Whether or not a selection change was generated from the WebTextView 92 // gaining focus. If it is, we do not want to pass it to webkit. This 93 // selection comes from the MovementMethod, but we behave differently. If 94 // WebTextView gained focus from a touch, webkit will determine the 95 // selection. 96 private boolean mFromFocusChange; 97 // Whether or not a selection change was generated from setInputType. We 98 // do not want to pass this change to webkit. 99 private boolean mFromSetInputType; 100 private boolean mGotTouchDown; 101 // Keep track of whether a long press has happened. Only meaningful after 102 // an ACTION_DOWN MotionEvent 103 private boolean mHasPerformedLongClick; 104 private boolean mInSetTextAndKeepSelection; 105 // Array to store the final character added in onTextChanged, so that its 106 // KeyEvents may be determined. 107 private char[] mCharacter = new char[1]; 108 // This is used to reset the length filter when on a textfield 109 // with no max length. 110 // FIXME: This can be replaced with TextView.NO_FILTERS if that 111 // is made public/protected. 112 private static final InputFilter[] NO_FILTERS = new InputFilter[0]; 113 114 /** 115 * Create a new WebTextView. 116 * @param context The Context for this WebTextView. 117 * @param webView The WebView that created this. 118 */ 119 /* package */ WebTextView(Context context, WebView webView) { 120 super(context, null, com.android.internal.R.attr.webTextViewStyle); 121 mWebView = webView; 122 mMaxLength = -1; 123 } 124 125 @Override 126 public boolean dispatchKeyEvent(KeyEvent event) { 127 if (event.isSystem()) { 128 return super.dispatchKeyEvent(event); 129 } 130 // Treat ACTION_DOWN and ACTION MULTIPLE the same 131 boolean down = event.getAction() != KeyEvent.ACTION_UP; 132 int keyCode = event.getKeyCode(); 133 134 boolean isArrowKey = false; 135 switch(keyCode) { 136 case KeyEvent.KEYCODE_DPAD_LEFT: 137 case KeyEvent.KEYCODE_DPAD_RIGHT: 138 case KeyEvent.KEYCODE_DPAD_UP: 139 case KeyEvent.KEYCODE_DPAD_DOWN: 140 if (!mWebView.nativeCursorMatchesFocus()) { 141 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 142 .onKeyUp(keyCode, event); 143 144 } 145 isArrowKey = true; 146 break; 147 } 148 149 if (KeyEvent.KEYCODE_TAB == keyCode) { 150 if (down) { 151 onEditorAction(EditorInfo.IME_ACTION_NEXT); 152 } 153 return true; 154 } 155 Spannable text = (Spannable) getText(); 156 int oldLength = text.length(); 157 // Normally the delete key's dom events are sent via onTextChanged. 158 // However, if the length is zero, the text did not change, so we 159 // go ahead and pass the key down immediately. 160 if (KeyEvent.KEYCODE_DEL == keyCode && 0 == oldLength) { 161 sendDomEvent(event); 162 return true; 163 } 164 165 if ((mSingle && KeyEvent.KEYCODE_ENTER == keyCode)) { 166 if (isPopupShowing()) { 167 return super.dispatchKeyEvent(event); 168 } 169 if (!down) { 170 // Hide the keyboard, since the user has just submitted this 171 // form. The submission happens thanks to the two calls 172 // to sendDomEvent. 173 InputMethodManager.getInstance(mContext) 174 .hideSoftInputFromWindow(getWindowToken(), 0); 175 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, keyCode)); 176 sendDomEvent(event); 177 } 178 return super.dispatchKeyEvent(event); 179 } else if (KeyEvent.KEYCODE_DPAD_CENTER == keyCode) { 180 // Note that this handles center key and trackball. 181 if (isPopupShowing()) { 182 return super.dispatchKeyEvent(event); 183 } 184 if (!mWebView.nativeCursorMatchesFocus()) { 185 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 186 .onKeyUp(keyCode, event); 187 } 188 // Center key should be passed to a potential onClick 189 if (!down) { 190 mWebView.centerKeyPressOnTextField(); 191 } 192 // Pass to super to handle longpress. 193 return super.dispatchKeyEvent(event); 194 } 195 196 // Ensure there is a layout so arrow keys are handled properly. 197 if (getLayout() == null) { 198 measure(mWidthSpec, mHeightSpec); 199 } 200 int oldStart = Selection.getSelectionStart(text); 201 int oldEnd = Selection.getSelectionEnd(text); 202 203 boolean maxedOut = mMaxLength != -1 && oldLength == mMaxLength; 204 // If we are at max length, and there is a selection rather than a 205 // cursor, we need to store the text to compare later, since the key 206 // may have changed the string. 207 String oldText; 208 if (maxedOut && oldEnd != oldStart) { 209 oldText = text.toString(); 210 } else { 211 oldText = ""; 212 } 213 if (super.dispatchKeyEvent(event)) { 214 // If the WebTextView handled the key it was either an alphanumeric 215 // key, a delete, or a movement within the text. All of those are 216 // ok to pass to javascript. 217 218 // UNLESS there is a max length determined by the html. In that 219 // case, if the string was already at the max length, an 220 // alphanumeric key will be erased by the LengthFilter, 221 // so do not pass down to javascript, and instead 222 // return true. If it is an arrow key or a delete key, we can go 223 // ahead and pass it down. 224 if (KeyEvent.KEYCODE_ENTER == keyCode) { 225 // For multi-line text boxes, newlines will 226 // trigger onTextChanged for key down (which will send both 227 // key up and key down) but not key up. 228 mGotEnterDown = true; 229 } 230 if (maxedOut && !isArrowKey && keyCode != KeyEvent.KEYCODE_DEL) { 231 if (oldEnd == oldStart) { 232 // Return true so the key gets dropped. 233 return true; 234 } else if (!oldText.equals(getText().toString())) { 235 // FIXME: This makes the text work properly, but it 236 // does not pass down the key event, so it may not 237 // work for a textfield that has the type of 238 // behavior of GoogleSuggest. That said, it is 239 // unlikely that a site would combine the two in 240 // one textfield. 241 Spannable span = (Spannable) getText(); 242 int newStart = Selection.getSelectionStart(span); 243 int newEnd = Selection.getSelectionEnd(span); 244 mWebView.replaceTextfieldText(0, oldLength, span.toString(), 245 newStart, newEnd); 246 return true; 247 } 248 } 249 /* FIXME: 250 * In theory, we would like to send the events for the arrow keys. 251 * However, the TextView can arbitrarily change the selection (i.e. 252 * long press followed by using the trackball). Therefore, we keep 253 * in sync with the TextView via onSelectionChanged. If we also 254 * send the DOM event, we lose the correct selection. 255 if (isArrowKey) { 256 // Arrow key does not change the text, but we still want to send 257 // the DOM events. 258 sendDomEvent(event); 259 } 260 */ 261 return true; 262 } 263 // Ignore the key up event for newlines. This prevents 264 // multiple newlines in the native textarea. 265 if (mGotEnterDown && !down) { 266 return true; 267 } 268 // if it is a navigation key, pass it to WebView 269 if (isArrowKey) { 270 // WebView check the trackballtime in onKeyDown to avoid calling 271 // native from both trackball and key handling. As this is called 272 // from WebTextView, we always want WebView to check with native. 273 // Reset trackballtime to ensure it. 274 mWebView.resetTrackballTime(); 275 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 276 .onKeyUp(keyCode, event); 277 } 278 return false; 279 } 280 281 /** 282 * Determine whether this WebTextView currently represents the node 283 * represented by ptr. 284 * @param ptr Pointer to a node to compare to. 285 * @return boolean Whether this WebTextView already represents the node 286 * pointed to by ptr. 287 */ 288 /* package */ boolean isSameTextField(int ptr) { 289 return ptr == mNodePointer; 290 } 291 292 @Override public InputConnection onCreateInputConnection( 293 EditorInfo outAttrs) { 294 InputConnection connection = super.onCreateInputConnection(outAttrs); 295 if (mWebView != null) { 296 // Use the name of the textfield + the url. Use backslash as an 297 // arbitrary separator. 298 outAttrs.fieldName = mWebView.nativeFocusCandidateName() + "\\" 299 + mWebView.getUrl(); 300 } 301 return connection; 302 } 303 304 /** 305 * In general, TextView makes a call to InputMethodManager.updateSelection 306 * in onDraw. However, in the general case of WebTextView, we do not draw. 307 * This method is called by WebView.onDraw to take care of the part that 308 * needs to be called. 309 */ 310 /* package */ void onDrawSubstitute() { 311 if (!willNotDraw()) { 312 // If the WebTextView is set to draw, such as in the case of a 313 // password, onDraw calls updateSelection(), so this code path is 314 // unnecessary. 315 return; 316 } 317 // This code is copied from TextView.onDraw(). That code does not get 318 // executed, however, because the WebTextView does not draw, allowing 319 // webkit's drawing to show through. 320 InputMethodManager imm = InputMethodManager.peekInstance(); 321 if (imm != null && imm.isActive(this)) { 322 Spannable sp = (Spannable) getText(); 323 int selStart = Selection.getSelectionStart(sp); 324 int selEnd = Selection.getSelectionEnd(sp); 325 int candStart = EditableInputConnection.getComposingSpanStart(sp); 326 int candEnd = EditableInputConnection.getComposingSpanEnd(sp); 327 imm.updateSelection(this, selStart, selEnd, candStart, candEnd); 328 } 329 } 330 331 @Override 332 protected void onDraw(Canvas canvas) { 333 // onDraw should only be called for password fields. If WebTextView is 334 // still drawing, but is no longer corresponding to a password field, 335 // remove it. 336 if (mWebView == null || !mWebView.nativeFocusCandidateIsPassword() 337 || !isSameTextField(mWebView.nativeFocusCandidatePointer())) { 338 // Although calling remove() would seem to make more sense here, 339 // changing it to not be a password field will make it not draw. 340 // Other code will make sure that it is removed completely, but this 341 // way the user will not see it. 342 setInPassword(false); 343 } else { 344 super.onDraw(canvas); 345 } 346 } 347 348 @Override 349 public void onEditorAction(int actionCode) { 350 switch (actionCode) { 351 case EditorInfo.IME_ACTION_NEXT: 352 if (mWebView.nativeMoveCursorToNextTextInput()) { 353 // Since the cursor will no longer be in the same place as the 354 // focus, set the focus controller back to inactive 355 mWebView.setFocusControllerInactive(); 356 // Preemptively rebuild the WebTextView, so that the action will 357 // be set properly. 358 mWebView.rebuildWebTextView(); 359 setDefaultSelection(); 360 mWebView.invalidate(); 361 } 362 break; 363 case EditorInfo.IME_ACTION_DONE: 364 super.onEditorAction(actionCode); 365 break; 366 case EditorInfo.IME_ACTION_GO: 367 case EditorInfo.IME_ACTION_SEARCH: 368 // Send an enter and hide the soft keyboard 369 InputMethodManager.getInstance(mContext) 370 .hideSoftInputFromWindow(getWindowToken(), 0); 371 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 372 KeyEvent.KEYCODE_ENTER)); 373 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 374 KeyEvent.KEYCODE_ENTER)); 375 376 default: 377 break; 378 } 379 } 380 381 @Override 382 protected void onFocusChanged(boolean focused, int direction, 383 Rect previouslyFocusedRect) { 384 mFromFocusChange = true; 385 super.onFocusChanged(focused, direction, previouslyFocusedRect); 386 mFromFocusChange = false; 387 } 388 389 @Override 390 protected void onSelectionChanged(int selStart, int selEnd) { 391 if (!mFromWebKit && !mFromFocusChange && !mFromSetInputType 392 && mWebView != null && !mInSetTextAndKeepSelection) { 393 if (DebugFlags.WEB_TEXT_VIEW) { 394 Log.v(LOGTAG, "onSelectionChanged selStart=" + selStart 395 + " selEnd=" + selEnd); 396 } 397 mWebView.setSelection(selStart, selEnd); 398 } 399 } 400 401 @Override 402 protected void onTextChanged(CharSequence s,int start,int before,int count){ 403 super.onTextChanged(s, start, before, count); 404 String postChange = s.toString(); 405 // Prevent calls to setText from invoking onTextChanged (since this will 406 // mean we are on a different textfield). Also prevent the change when 407 // going from a textfield with a string of text to one with a smaller 408 // limit on text length from registering the onTextChanged event. 409 if (mPreChange == null || mPreChange.equals(postChange) || 410 (mMaxLength > -1 && mPreChange.length() > mMaxLength && 411 mPreChange.substring(0, mMaxLength).equals(postChange))) { 412 return; 413 } 414 mPreChange = postChange; 415 if (0 == count) { 416 if (before > 0) { 417 // This was simply a delete or a cut, so just delete the 418 // selection. 419 mWebView.deleteSelection(start, start + before); 420 // For this and all changes to the text, update our cache 421 updateCachedTextfield(); 422 } 423 // before should never be negative, so whether it was a cut 424 // (handled above), or before is 0, in which case nothing has 425 // changed, we should return. 426 return; 427 } 428 // Find the last character being replaced. If it can be represented by 429 // events, we will pass them to native (after replacing the beginning 430 // of the changed text), so we can see javascript events. 431 // Otherwise, replace the text being changed (including the last 432 // character) in the textfield. 433 TextUtils.getChars(s, start + count - 1, start + count, mCharacter, 0); 434 KeyCharacterMap kmap = 435 KeyCharacterMap.load(KeyCharacterMap.BUILT_IN_KEYBOARD); 436 KeyEvent[] events = kmap.getEvents(mCharacter); 437 boolean cannotUseKeyEvents = null == events; 438 int charactersFromKeyEvents = cannotUseKeyEvents ? 0 : 1; 439 if (count > 1 || cannotUseKeyEvents) { 440 String replace = s.subSequence(start, 441 start + count - charactersFromKeyEvents).toString(); 442 mWebView.replaceTextfieldText(start, start + before, replace, 443 start + count - charactersFromKeyEvents, 444 start + count - charactersFromKeyEvents); 445 } else { 446 // This corrects the selection which may have been affected by the 447 // trackball or auto-correct. 448 if (DebugFlags.WEB_TEXT_VIEW) { 449 Log.v(LOGTAG, "onTextChanged start=" + start 450 + " start + before=" + (start + before)); 451 } 452 if (!mInSetTextAndKeepSelection) { 453 mWebView.setSelection(start, start + before); 454 } 455 } 456 if (!cannotUseKeyEvents) { 457 int length = events.length; 458 for (int i = 0; i < length; i++) { 459 // We never send modifier keys to native code so don't send them 460 // here either. 461 if (!KeyEvent.isModifierKey(events[i].getKeyCode())) { 462 sendDomEvent(events[i]); 463 } 464 } 465 } 466 updateCachedTextfield(); 467 } 468 469 @Override 470 public boolean onTouchEvent(MotionEvent event) { 471 switch (event.getAction()) { 472 case MotionEvent.ACTION_DOWN: 473 super.onTouchEvent(event); 474 // This event may be the start of a drag, so store it to pass to the 475 // WebView if it is. 476 mDragStartX = event.getX(); 477 mDragStartY = event.getY(); 478 mDragStartTime = event.getEventTime(); 479 mDragSent = false; 480 mScrolled = false; 481 mGotTouchDown = true; 482 mHasPerformedLongClick = false; 483 break; 484 case MotionEvent.ACTION_MOVE: 485 if (mHasPerformedLongClick) { 486 mGotTouchDown = false; 487 return false; 488 } 489 int slop = ViewConfiguration.get(mContext).getScaledTouchSlop(); 490 Spannable buffer = getText(); 491 int initialScrollX = Touch.getInitialScrollX(this, buffer); 492 int initialScrollY = Touch.getInitialScrollY(this, buffer); 493 super.onTouchEvent(event); 494 int dx = Math.abs(mScrollX - initialScrollX); 495 int dy = Math.abs(mScrollY - initialScrollY); 496 // Use a smaller slop when checking to see if we've moved far enough 497 // to scroll the text, because experimentally, slop has shown to be 498 // to big for the case of a small textfield. 499 int smallerSlop = slop/2; 500 if (dx > smallerSlop || dy > smallerSlop) { 501 Layout layout = getLayout(); 502 if (mWebView != null && layout != null) { 503 float maxScrollX = (float) Touch.getMaxScrollX(this, layout, 504 mScrollY); 505 if (DebugFlags.WEB_TEXT_VIEW) { 506 Log.v(LOGTAG, "onTouchEvent x=" + mScrollX + " y=" 507 + mScrollY + " maxX=" + maxScrollX); 508 } 509 mWebView.scrollFocusedTextInput(maxScrollX > 0 ? 510 mScrollX / maxScrollX : 0, mScrollY); 511 } 512 mScrolled = true; 513 cancelLongPress(); 514 return true; 515 } 516 if (Math.abs((int) event.getX() - mDragStartX) < slop 517 && Math.abs((int) event.getY() - mDragStartY) < slop) { 518 // If the user has not scrolled further than slop, we should not 519 // send the drag. Instead, do nothing, and when the user lifts 520 // their finger, we will change the selection. 521 return true; 522 } 523 if (mWebView != null) { 524 // Only want to set the initial state once. 525 if (!mDragSent) { 526 mWebView.initiateTextFieldDrag(mDragStartX, mDragStartY, 527 mDragStartTime); 528 mDragSent = true; 529 } 530 boolean scrolled = mWebView.textFieldDrag(event); 531 if (scrolled) { 532 mScrolled = true; 533 cancelLongPress(); 534 return true; 535 } 536 } 537 return false; 538 case MotionEvent.ACTION_UP: 539 case MotionEvent.ACTION_CANCEL: 540 if (mHasPerformedLongClick) { 541 mGotTouchDown = false; 542 return false; 543 } 544 if (!mScrolled) { 545 // If the page scrolled, or the TextView scrolled, we do not 546 // want to change the selection 547 cancelLongPress(); 548 if (mGotTouchDown && mWebView != null) { 549 mWebView.touchUpOnTextField(event); 550 } 551 } 552 // Necessary for the WebView to reset its state 553 if (mWebView != null && mDragSent) { 554 mWebView.onTouchEvent(event); 555 } 556 mGotTouchDown = false; 557 break; 558 default: 559 break; 560 } 561 return true; 562 } 563 564 @Override 565 public boolean onTrackballEvent(MotionEvent event) { 566 if (isPopupShowing()) { 567 return super.onTrackballEvent(event); 568 } 569 if (event.getAction() != MotionEvent.ACTION_MOVE) { 570 return false; 571 } 572 // If the Cursor is not on the text input, webview should handle the 573 // trackball 574 if (!mWebView.nativeCursorMatchesFocus()) { 575 return mWebView.onTrackballEvent(event); 576 } 577 Spannable text = (Spannable) getText(); 578 MovementMethod move = getMovementMethod(); 579 if (move != null && getLayout() != null && 580 move.onTrackballEvent(this, text, event)) { 581 // Selection is changed in onSelectionChanged 582 return true; 583 } 584 return false; 585 } 586 587 @Override 588 public boolean performLongClick() { 589 mHasPerformedLongClick = true; 590 return super.performLongClick(); 591 } 592 593 /** 594 * Remove this WebTextView from its host WebView, and return 595 * focus to the host. 596 */ 597 /* package */ void remove() { 598 // hide the soft keyboard when the edit text is out of focus 599 InputMethodManager.getInstance(mContext).hideSoftInputFromWindow( 600 getWindowToken(), 0); 601 mWebView.removeView(this); 602 mWebView.requestFocus(); 603 } 604 605 /* package */ void bringIntoView() { 606 if (getLayout() != null) { 607 bringPointIntoView(Selection.getSelectionEnd(getText())); 608 } 609 } 610 611 /** 612 * Send the DOM events for the specified event. 613 * @param event KeyEvent to be translated into a DOM event. 614 */ 615 private void sendDomEvent(KeyEvent event) { 616 mWebView.passToJavaScript(getText().toString(), event); 617 } 618 619 /** 620 * Always use this instead of setAdapter, as this has features specific to 621 * the WebTextView. 622 */ 623 public void setAdapterCustom(AutoCompleteAdapter adapter) { 624 if (adapter != null) { 625 setInputType(getInputType() 626 | EditorInfo.TYPE_TEXT_FLAG_AUTO_COMPLETE); 627 adapter.setTextView(this); 628 } 629 super.setAdapter(adapter); 630 } 631 632 /** 633 * This is a special version of ArrayAdapter which changes its text size 634 * to match the text size of its host TextView. 635 */ 636 public static class AutoCompleteAdapter extends ArrayAdapter<String> { 637 private TextView mTextView; 638 639 public AutoCompleteAdapter(Context context, ArrayList<String> entries) { 640 super(context, com.android.internal.R.layout 641 .search_dropdown_item_1line, entries); 642 } 643 644 /** 645 * {@inheritDoc} 646 */ 647 public View getView(int position, View convertView, ViewGroup parent) { 648 TextView tv = 649 (TextView) super.getView(position, convertView, parent); 650 if (tv != null && mTextView != null) { 651 tv.setTextSize(mTextView.getTextSize()); 652 } 653 return tv; 654 } 655 656 /** 657 * Set the TextView so we can match its text size. 658 */ 659 private void setTextView(TextView tv) { 660 mTextView = tv; 661 } 662 } 663 664 /** 665 * Sets the selection when the user clicks on a textfield or textarea with 666 * the trackball or center key, or starts typing into it without clicking on 667 * it. 668 */ 669 /* package */ void setDefaultSelection() { 670 Spannable text = (Spannable) getText(); 671 int selection = mSingle ? text.length() : 0; 672 if (Selection.getSelectionStart(text) == selection 673 && Selection.getSelectionEnd(text) == selection) { 674 // The selection of the UI copy is set correctly, but the 675 // WebTextView still needs to inform the webkit thread to set the 676 // selection. Normally that is done in onSelectionChanged, but 677 // onSelectionChanged will not be called because the UI copy is not 678 // changing. (This can happen when the WebTextView takes focus. 679 // That onSelectionChanged was blocked because the selection set 680 // when focusing is not necessarily the desirable selection for 681 // WebTextView.) 682 if (mWebView != null) { 683 mWebView.setSelection(selection, selection); 684 } 685 } else { 686 Selection.setSelection(text, selection, selection); 687 } 688 if (mWebView != null) mWebView.incrementTextGeneration(); 689 } 690 691 /** 692 * Determine whether to use the system-wide password disguising method, 693 * or to use none. 694 * @param inPassword True if the textfield is a password field. 695 */ 696 /* package */ void setInPassword(boolean inPassword) { 697 if (inPassword) { 698 setInputType(EditorInfo.TYPE_CLASS_TEXT | EditorInfo. 699 TYPE_TEXT_VARIATION_PASSWORD); 700 createBackground(); 701 } 702 // For password fields, draw the WebTextView. For others, just show 703 // webkit's drawing. 704 setWillNotDraw(!inPassword); 705 setBackgroundDrawable(inPassword ? mBackground : null); 706 // For non-password fields, avoid the invals from TextView's blinking 707 // cursor 708 setCursorVisible(inPassword); 709 } 710 711 /** 712 * Private class used for the background of a password textfield. 713 */ 714 private static class OutlineDrawable extends Drawable { 715 public void draw(Canvas canvas) { 716 Rect bounds = getBounds(); 717 Paint paint = new Paint(); 718 paint.setAntiAlias(true); 719 // Draw the background. 720 paint.setColor(Color.WHITE); 721 canvas.drawRect(bounds, paint); 722 // Draw the outline. 723 paint.setStyle(Paint.Style.STROKE); 724 paint.setColor(Color.BLACK); 725 canvas.drawRect(bounds, paint); 726 } 727 // Always want it to be opaque. 728 public int getOpacity() { 729 return PixelFormat.OPAQUE; 730 } 731 // These are needed because they are abstract in Drawable. 732 public void setAlpha(int alpha) { } 733 public void setColorFilter(ColorFilter cf) { } 734 } 735 736 /** 737 * Create a background for the WebTextView and set up the paint for drawing 738 * the text. This way, we can see the password transformation of the 739 * system, which (optionally) shows the actual text before changing to dots. 740 * The background is necessary to hide the webkit-drawn text beneath. 741 */ 742 private void createBackground() { 743 if (mBackground != null) { 744 return; 745 } 746 mBackground = new OutlineDrawable(); 747 748 setGravity(Gravity.CENTER_VERTICAL); 749 // Turn on subpixel text, and turn off kerning, so it better matches 750 // the text in webkit. 751 TextPaint paint = getPaint(); 752 int flags = paint.getFlags() | Paint.SUBPIXEL_TEXT_FLAG | 753 Paint.ANTI_ALIAS_FLAG & ~Paint.DEV_KERN_TEXT_FLAG; 754 paint.setFlags(flags); 755 // Set the text color to black, regardless of the theme. This ensures 756 // that other applications that use embedded WebViews will properly 757 // display the text in password textfields. 758 setTextColor(Color.BLACK); 759 } 760 761 @Override 762 public void setInputType(int type) { 763 mFromSetInputType = true; 764 super.setInputType(type); 765 mFromSetInputType = false; 766 } 767 768 private void setMaxLength(int maxLength) { 769 mMaxLength = maxLength; 770 if (-1 == maxLength) { 771 setFilters(NO_FILTERS); 772 } else { 773 setFilters(new InputFilter[] { 774 new InputFilter.LengthFilter(maxLength) }); 775 } 776 } 777 778 /** 779 * Set the pointer for this node so it can be determined which node this 780 * WebTextView represents. 781 * @param ptr Integer representing the pointer to the node which this 782 * WebTextView represents. 783 */ 784 /* package */ void setNodePointer(int ptr) { 785 mNodePointer = ptr; 786 } 787 788 /** 789 * Determine the position and size of WebTextView, and add it to the 790 * WebView's view heirarchy. All parameters are presumed to be in 791 * view coordinates. Also requests Focus and sets the cursor to not 792 * request to be in view. 793 * @param x x-position of the textfield. 794 * @param y y-position of the textfield. 795 * @param width width of the textfield. 796 * @param height height of the textfield. 797 */ 798 /* package */ void setRect(int x, int y, int width, int height) { 799 LayoutParams lp = (LayoutParams) getLayoutParams(); 800 if (null == lp) { 801 lp = new LayoutParams(width, height, x, y); 802 } else { 803 lp.x = x; 804 lp.y = y; 805 lp.width = width; 806 lp.height = height; 807 } 808 if (getParent() == null) { 809 mWebView.addView(this, lp); 810 } else { 811 setLayoutParams(lp); 812 } 813 // Set up a measure spec so a layout can always be recreated. 814 mWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY); 815 mHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY); 816 } 817 818 /** 819 * Set the selection, and disable our onSelectionChanged action. 820 */ 821 /* package */ void setSelectionFromWebKit(int start, int end) { 822 if (start < 0 || end < 0) return; 823 Spannable text = (Spannable) getText(); 824 int length = text.length(); 825 if (start > length || end > length) return; 826 mFromWebKit = true; 827 Selection.setSelection(text, start, end); 828 mFromWebKit = false; 829 } 830 831 /** 832 * Set the text to the new string, but use the old selection, making sure 833 * to keep it within the new string. 834 * @param text The new text to place in the textfield. 835 */ 836 /* package */ void setTextAndKeepSelection(String text) { 837 mPreChange = text.toString(); 838 Editable edit = (Editable) getText(); 839 int selStart = Selection.getSelectionStart(edit); 840 int selEnd = Selection.getSelectionEnd(edit); 841 mInSetTextAndKeepSelection = true; 842 edit.replace(0, edit.length(), text); 843 int newLength = edit.length(); 844 if (selStart > newLength) selStart = newLength; 845 if (selEnd > newLength) selEnd = newLength; 846 Selection.setSelection(edit, selStart, selEnd); 847 mInSetTextAndKeepSelection = false; 848 updateCachedTextfield(); 849 } 850 851 /** 852 * Called by WebView.rebuildWebTextView(). Based on the type of the <input> 853 * element, set up the WebTextView, its InputType, and IME Options properly. 854 * @param type int corresponding to enum "type" defined in WebView.cpp. 855 * Does not correspond to HTMLInputElement::InputType so this 856 * is unaffected if that changes, and also because that has no 857 * type corresponding to textarea (which is its own tag). 858 */ 859 /* package */ void setType(int type) { 860 if (mWebView == null) return; 861 boolean single = true; 862 boolean inPassword = false; 863 int maxLength = -1; 864 int inputType = EditorInfo.TYPE_CLASS_TEXT; 865 if (mWebView.nativeFocusCandidateHasNextTextfield()) { 866 inputType |= EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT; 867 } 868 int imeOptions = EditorInfo.IME_FLAG_NO_EXTRACT_UI 869 | EditorInfo.IME_FLAG_NO_FULLSCREEN; 870 switch (type) { 871 case 0: // NORMAL_TEXT_FIELD 872 imeOptions |= EditorInfo.IME_ACTION_GO; 873 break; 874 case 1: // TEXT_AREA 875 single = false; 876 inputType = EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE 877 | EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES 878 | EditorInfo.TYPE_CLASS_TEXT 879 | EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT; 880 imeOptions |= EditorInfo.IME_ACTION_NONE; 881 break; 882 case 2: // PASSWORD 883 inPassword = true; 884 imeOptions |= EditorInfo.IME_ACTION_GO; 885 break; 886 case 3: // SEARCH 887 imeOptions |= EditorInfo.IME_ACTION_SEARCH; 888 break; 889 case 4: // EMAIL 890 // TYPE_TEXT_VARIATION_WEB_EDIT_TEXT prevents EMAIL_ADDRESS 891 // from working, so exclude it for now. 892 imeOptions |= EditorInfo.IME_ACTION_GO; 893 break; 894 case 5: // NUMBER 895 inputType |= EditorInfo.TYPE_CLASS_NUMBER; 896 // Number and telephone do not have both a Tab key and an 897 // action, so set the action to NEXT 898 imeOptions |= EditorInfo.IME_ACTION_NEXT; 899 break; 900 case 6: // TELEPHONE 901 inputType |= EditorInfo.TYPE_CLASS_PHONE; 902 imeOptions |= EditorInfo.IME_ACTION_NEXT; 903 break; 904 case 7: // URL 905 // TYPE_TEXT_VARIATION_URI prevents Tab key from showing, so 906 // exclude it for now. 907 imeOptions |= EditorInfo.IME_ACTION_GO; 908 break; 909 default: 910 imeOptions |= EditorInfo.IME_ACTION_GO; 911 break; 912 } 913 setHint(null); 914 if (single) { 915 mWebView.requestLabel(mWebView.nativeFocusCandidateFramePointer(), 916 mNodePointer); 917 maxLength = mWebView.nativeFocusCandidateMaxLength(); 918 if (type != 2 /* PASSWORD */) { 919 String name = mWebView.nativeFocusCandidateName(); 920 if (name != null && name.length() > 0) { 921 mWebView.requestFormData(name, mNodePointer); 922 } 923 } 924 } 925 mSingle = single; 926 setMaxLength(maxLength); 927 setHorizontallyScrolling(single); 928 setInputType(inputType); 929 setImeOptions(imeOptions); 930 setInPassword(inPassword); 931 AutoCompleteAdapter adapter = null; 932 setAdapterCustom(adapter); 933 } 934 935 /** 936 * Update the cache to reflect the current text. 937 */ 938 /* package */ void updateCachedTextfield() { 939 mWebView.updateCachedTextfield(getText().toString()); 940 } 941 942 @Override 943 public boolean requestRectangleOnScreen(Rect rectangle) { 944 // don't scroll while in zoom animation. When it is done, we will adjust 945 // the WebTextView if it is in editing mode. 946 if (!mWebView.inAnimateZoom()) { 947 return super.requestRectangleOnScreen(rectangle); 948 } 949 return false; 950 } 951} 952