WebTextView.java revision 44d2c69ad30878521c6eff66a83893099b3d12ee
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 /** 293 * Ensure that the underlying textfield is lined up with the WebTextView. 294 */ 295 private void lineUpScroll() { 296 Layout layout = getLayout(); 297 if (mWebView != null && layout != null) { 298 float maxScrollX = Touch.getMaxScrollX(this, layout, mScrollY); 299 if (DebugFlags.WEB_TEXT_VIEW) { 300 Log.v(LOGTAG, "onTouchEvent x=" + mScrollX + " y=" 301 + mScrollY + " maxX=" + maxScrollX); 302 } 303 mWebView.scrollFocusedTextInput(maxScrollX > 0 ? 304 mScrollX / maxScrollX : 0, mScrollY); 305 } 306 } 307 308 @Override public InputConnection onCreateInputConnection( 309 EditorInfo outAttrs) { 310 InputConnection connection = super.onCreateInputConnection(outAttrs); 311 if (mWebView != null) { 312 // Use the name of the textfield + the url. Use backslash as an 313 // arbitrary separator. 314 outAttrs.fieldName = mWebView.nativeFocusCandidateName() + "\\" 315 + mWebView.getUrl(); 316 } 317 return connection; 318 } 319 320 @Override 321 protected void onDraw(Canvas canvas) { 322 // onDraw should only be called for password fields. If WebTextView is 323 // still drawing, but is no longer corresponding to a password field, 324 // remove it. 325 if (mWebView == null || !mWebView.nativeFocusCandidateIsPassword() 326 || !isSameTextField(mWebView.nativeFocusCandidatePointer())) { 327 // Although calling remove() would seem to make more sense here, 328 // changing it to not be a password field will make it not draw. 329 // Other code will make sure that it is removed completely, but this 330 // way the user will not see it. 331 setInPassword(false); 332 } else { 333 super.onDraw(canvas); 334 } 335 } 336 337 @Override 338 public void onEditorAction(int actionCode) { 339 switch (actionCode) { 340 case EditorInfo.IME_ACTION_NEXT: 341 if (mWebView.nativeMoveCursorToNextTextInput()) { 342 // Since the cursor will no longer be in the same place as the 343 // focus, set the focus controller back to inactive 344 mWebView.setFocusControllerInactive(); 345 // Preemptively rebuild the WebTextView, so that the action will 346 // be set properly. 347 mWebView.rebuildWebTextView(); 348 setDefaultSelection(); 349 mWebView.invalidate(); 350 } 351 break; 352 case EditorInfo.IME_ACTION_DONE: 353 super.onEditorAction(actionCode); 354 break; 355 case EditorInfo.IME_ACTION_GO: 356 case EditorInfo.IME_ACTION_SEARCH: 357 // Send an enter and hide the soft keyboard 358 InputMethodManager.getInstance(mContext) 359 .hideSoftInputFromWindow(getWindowToken(), 0); 360 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 361 KeyEvent.KEYCODE_ENTER)); 362 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 363 KeyEvent.KEYCODE_ENTER)); 364 365 default: 366 break; 367 } 368 } 369 370 @Override 371 protected void onFocusChanged(boolean focused, int direction, 372 Rect previouslyFocusedRect) { 373 mFromFocusChange = true; 374 super.onFocusChanged(focused, direction, previouslyFocusedRect); 375 mFromFocusChange = false; 376 } 377 378 @Override 379 protected void onScrollChanged(int l, int t, int oldl, int oldt) { 380 super.onScrollChanged(l, t, oldl, oldt); 381 lineUpScroll(); 382 } 383 384 @Override 385 protected void onSelectionChanged(int selStart, int selEnd) { 386 if (mInSetTextAndKeepSelection) return; 387 // This code is copied from TextView.onDraw(). That code does not get 388 // executed, however, because the WebTextView does not draw, allowing 389 // webkit's drawing to show through. 390 InputMethodManager imm = InputMethodManager.peekInstance(); 391 if (imm != null && imm.isActive(this)) { 392 Spannable sp = (Spannable) getText(); 393 int candStart = EditableInputConnection.getComposingSpanStart(sp); 394 int candEnd = EditableInputConnection.getComposingSpanEnd(sp); 395 imm.updateSelection(this, selStart, selEnd, candStart, candEnd); 396 } 397 if (!mFromWebKit && !mFromFocusChange && !mFromSetInputType 398 && mWebView != null) { 399 if (DebugFlags.WEB_TEXT_VIEW) { 400 Log.v(LOGTAG, "onSelectionChanged selStart=" + selStart 401 + " selEnd=" + selEnd); 402 } 403 mWebView.setSelection(selStart, selEnd); 404 lineUpScroll(); 405 } 406 } 407 408 @Override 409 protected void onTextChanged(CharSequence s,int start,int before,int count){ 410 super.onTextChanged(s, start, before, count); 411 String postChange = s.toString(); 412 // Prevent calls to setText from invoking onTextChanged (since this will 413 // mean we are on a different textfield). Also prevent the change when 414 // going from a textfield with a string of text to one with a smaller 415 // limit on text length from registering the onTextChanged event. 416 if (mPreChange == null || mPreChange.equals(postChange) || 417 (mMaxLength > -1 && mPreChange.length() > mMaxLength && 418 mPreChange.substring(0, mMaxLength).equals(postChange))) { 419 return; 420 } 421 mPreChange = postChange; 422 if (0 == count) { 423 if (before > 0) { 424 // This was simply a delete or a cut, so just delete the 425 // selection. 426 mWebView.deleteSelection(start, start + before); 427 // For this and all changes to the text, update our cache 428 updateCachedTextfield(); 429 } 430 // before should never be negative, so whether it was a cut 431 // (handled above), or before is 0, in which case nothing has 432 // changed, we should return. 433 return; 434 } 435 // Find the last character being replaced. If it can be represented by 436 // events, we will pass them to native (after replacing the beginning 437 // of the changed text), so we can see javascript events. 438 // Otherwise, replace the text being changed (including the last 439 // character) in the textfield. 440 TextUtils.getChars(s, start + count - 1, start + count, mCharacter, 0); 441 KeyCharacterMap kmap = 442 KeyCharacterMap.load(KeyCharacterMap.BUILT_IN_KEYBOARD); 443 KeyEvent[] events = kmap.getEvents(mCharacter); 444 boolean cannotUseKeyEvents = null == events; 445 int charactersFromKeyEvents = cannotUseKeyEvents ? 0 : 1; 446 if (count > 1 || cannotUseKeyEvents) { 447 String replace = s.subSequence(start, 448 start + count - charactersFromKeyEvents).toString(); 449 mWebView.replaceTextfieldText(start, start + before, replace, 450 start + count - charactersFromKeyEvents, 451 start + count - charactersFromKeyEvents); 452 } else { 453 // This corrects the selection which may have been affected by the 454 // trackball or auto-correct. 455 if (DebugFlags.WEB_TEXT_VIEW) { 456 Log.v(LOGTAG, "onTextChanged start=" + start 457 + " start + before=" + (start + before)); 458 } 459 if (!mInSetTextAndKeepSelection) { 460 mWebView.setSelection(start, start + before); 461 } 462 } 463 if (!cannotUseKeyEvents) { 464 int length = events.length; 465 for (int i = 0; i < length; i++) { 466 // We never send modifier keys to native code so don't send them 467 // here either. 468 if (!KeyEvent.isModifierKey(events[i].getKeyCode())) { 469 sendDomEvent(events[i]); 470 } 471 } 472 } 473 updateCachedTextfield(); 474 } 475 476 @Override 477 public boolean onTouchEvent(MotionEvent event) { 478 switch (event.getAction()) { 479 case MotionEvent.ACTION_DOWN: 480 super.onTouchEvent(event); 481 // This event may be the start of a drag, so store it to pass to the 482 // WebView if it is. 483 mDragStartX = event.getX(); 484 mDragStartY = event.getY(); 485 mDragStartTime = event.getEventTime(); 486 mDragSent = false; 487 mScrolled = false; 488 mGotTouchDown = true; 489 mHasPerformedLongClick = false; 490 break; 491 case MotionEvent.ACTION_MOVE: 492 if (mHasPerformedLongClick) { 493 mGotTouchDown = false; 494 return false; 495 } 496 int slop = ViewConfiguration.get(mContext).getScaledTouchSlop(); 497 Spannable buffer = getText(); 498 int initialScrollX = Touch.getInitialScrollX(this, buffer); 499 int initialScrollY = Touch.getInitialScrollY(this, buffer); 500 super.onTouchEvent(event); 501 int dx = Math.abs(mScrollX - initialScrollX); 502 int dy = Math.abs(mScrollY - initialScrollY); 503 // Use a smaller slop when checking to see if we've moved far enough 504 // to scroll the text, because experimentally, slop has shown to be 505 // to big for the case of a small textfield. 506 int smallerSlop = slop/2; 507 if (dx > smallerSlop || dy > smallerSlop) { 508 // Scrolling is handled in onScrollChanged. 509 mScrolled = true; 510 cancelLongPress(); 511 return true; 512 } 513 if (Math.abs((int) event.getX() - mDragStartX) < slop 514 && Math.abs((int) event.getY() - mDragStartY) < slop) { 515 // If the user has not scrolled further than slop, we should not 516 // send the drag. Instead, do nothing, and when the user lifts 517 // their finger, we will change the selection. 518 return true; 519 } 520 if (mWebView != null) { 521 // Only want to set the initial state once. 522 if (!mDragSent) { 523 mWebView.initiateTextFieldDrag(mDragStartX, mDragStartY, 524 mDragStartTime); 525 mDragSent = true; 526 } 527 boolean scrolled = mWebView.textFieldDrag(event); 528 if (scrolled) { 529 mScrolled = true; 530 cancelLongPress(); 531 return true; 532 } 533 } 534 return false; 535 case MotionEvent.ACTION_UP: 536 case MotionEvent.ACTION_CANCEL: 537 super.onTouchEvent(event); 538 if (mHasPerformedLongClick) { 539 mGotTouchDown = false; 540 return false; 541 } 542 if (!mScrolled) { 543 // If the page scrolled, or the TextView scrolled, we do not 544 // want to change the selection 545 cancelLongPress(); 546 if (mGotTouchDown && mWebView != null) { 547 mWebView.touchUpOnTextField(event); 548 } 549 } 550 // Necessary for the WebView to reset its state 551 if (mWebView != null && mDragSent) { 552 mWebView.onTouchEvent(event); 553 } 554 mGotTouchDown = false; 555 break; 556 default: 557 break; 558 } 559 return true; 560 } 561 562 @Override 563 public boolean onTrackballEvent(MotionEvent event) { 564 if (isPopupShowing()) { 565 return super.onTrackballEvent(event); 566 } 567 if (event.getAction() != MotionEvent.ACTION_MOVE) { 568 return false; 569 } 570 // If the Cursor is not on the text input, webview should handle the 571 // trackball 572 if (!mWebView.nativeCursorMatchesFocus()) { 573 return mWebView.onTrackballEvent(event); 574 } 575 Spannable text = (Spannable) getText(); 576 MovementMethod move = getMovementMethod(); 577 if (move != null && getLayout() != null && 578 move.onTrackballEvent(this, text, event)) { 579 // Selection is changed in onSelectionChanged 580 return true; 581 } 582 return false; 583 } 584 585 @Override 586 public boolean performLongClick() { 587 mHasPerformedLongClick = true; 588 return super.performLongClick(); 589 } 590 591 /** 592 * Remove this WebTextView from its host WebView, and return 593 * focus to the host. 594 */ 595 /* package */ void remove() { 596 // hide the soft keyboard when the edit text is out of focus 597 InputMethodManager.getInstance(mContext).hideSoftInputFromWindow( 598 getWindowToken(), 0); 599 mWebView.removeView(this); 600 mWebView.requestFocus(); 601 } 602 603 /* package */ void bringIntoView() { 604 if (getLayout() != null) { 605 bringPointIntoView(Selection.getSelectionEnd(getText())); 606 } 607 } 608 609 /** 610 * Send the DOM events for the specified event. 611 * @param event KeyEvent to be translated into a DOM event. 612 */ 613 private void sendDomEvent(KeyEvent event) { 614 mWebView.passToJavaScript(getText().toString(), event); 615 } 616 617 /** 618 * Always use this instead of setAdapter, as this has features specific to 619 * the WebTextView. 620 */ 621 public void setAdapterCustom(AutoCompleteAdapter adapter) { 622 if (adapter != null) { 623 setInputType(getInputType() 624 | EditorInfo.TYPE_TEXT_FLAG_AUTO_COMPLETE); 625 adapter.setTextView(this); 626 } 627 super.setAdapter(adapter); 628 } 629 630 /** 631 * This is a special version of ArrayAdapter which changes its text size 632 * to match the text size of its host TextView. 633 */ 634 public static class AutoCompleteAdapter extends ArrayAdapter<String> { 635 private TextView mTextView; 636 637 public AutoCompleteAdapter(Context context, ArrayList<String> entries) { 638 super(context, com.android.internal.R.layout 639 .search_dropdown_item_1line, entries); 640 } 641 642 /** 643 * {@inheritDoc} 644 */ 645 public View getView(int position, View convertView, ViewGroup parent) { 646 TextView tv = 647 (TextView) super.getView(position, convertView, parent); 648 if (tv != null && mTextView != null) { 649 tv.setTextSize(mTextView.getTextSize()); 650 } 651 return tv; 652 } 653 654 /** 655 * Set the TextView so we can match its text size. 656 */ 657 private void setTextView(TextView tv) { 658 mTextView = tv; 659 } 660 } 661 662 /** 663 * Sets the selection when the user clicks on a textfield or textarea with 664 * the trackball or center key, or starts typing into it without clicking on 665 * it. 666 */ 667 /* package */ void setDefaultSelection() { 668 Spannable text = (Spannable) getText(); 669 int selection = mSingle ? text.length() : 0; 670 if (Selection.getSelectionStart(text) == selection 671 && Selection.getSelectionEnd(text) == selection) { 672 // The selection of the UI copy is set correctly, but the 673 // WebTextView still needs to inform the webkit thread to set the 674 // selection. Normally that is done in onSelectionChanged, but 675 // onSelectionChanged will not be called because the UI copy is not 676 // changing. (This can happen when the WebTextView takes focus. 677 // That onSelectionChanged was blocked because the selection set 678 // when focusing is not necessarily the desirable selection for 679 // WebTextView.) 680 if (mWebView != null) { 681 mWebView.setSelection(selection, selection); 682 } 683 } else { 684 Selection.setSelection(text, selection, selection); 685 } 686 } 687 688 /** 689 * Determine whether to use the system-wide password disguising method, 690 * or to use none. 691 * @param inPassword True if the textfield is a password field. 692 */ 693 /* package */ void setInPassword(boolean inPassword) { 694 if (inPassword) { 695 setInputType(EditorInfo.TYPE_CLASS_TEXT | EditorInfo. 696 TYPE_TEXT_VARIATION_PASSWORD); 697 createBackground(); 698 } 699 // For password fields, draw the WebTextView. For others, just show 700 // webkit's drawing. 701 setWillNotDraw(!inPassword); 702 setBackgroundDrawable(inPassword ? mBackground : null); 703 } 704 705 /** 706 * Private class used for the background of a password textfield. 707 */ 708 private static class OutlineDrawable extends Drawable { 709 public void draw(Canvas canvas) { 710 Rect bounds = getBounds(); 711 Paint paint = new Paint(); 712 paint.setAntiAlias(true); 713 // Draw the background. 714 paint.setColor(Color.WHITE); 715 canvas.drawRect(bounds, paint); 716 // Draw the outline. 717 paint.setStyle(Paint.Style.STROKE); 718 paint.setColor(Color.BLACK); 719 canvas.drawRect(bounds, paint); 720 } 721 // Always want it to be opaque. 722 public int getOpacity() { 723 return PixelFormat.OPAQUE; 724 } 725 // These are needed because they are abstract in Drawable. 726 public void setAlpha(int alpha) { } 727 public void setColorFilter(ColorFilter cf) { } 728 } 729 730 /** 731 * Create a background for the WebTextView and set up the paint for drawing 732 * the text. This way, we can see the password transformation of the 733 * system, which (optionally) shows the actual text before changing to dots. 734 * The background is necessary to hide the webkit-drawn text beneath. 735 */ 736 private void createBackground() { 737 if (mBackground != null) { 738 return; 739 } 740 mBackground = new OutlineDrawable(); 741 742 setGravity(Gravity.CENTER_VERTICAL); 743 // Turn on subpixel text, and turn off kerning, so it better matches 744 // the text in webkit. 745 TextPaint paint = getPaint(); 746 int flags = paint.getFlags() | Paint.SUBPIXEL_TEXT_FLAG | 747 Paint.ANTI_ALIAS_FLAG & ~Paint.DEV_KERN_TEXT_FLAG; 748 paint.setFlags(flags); 749 // Set the text color to black, regardless of the theme. This ensures 750 // that other applications that use embedded WebViews will properly 751 // display the text in password textfields. 752 setTextColor(Color.BLACK); 753 } 754 755 @Override 756 public void setInputType(int type) { 757 mFromSetInputType = true; 758 super.setInputType(type); 759 mFromSetInputType = false; 760 } 761 762 private void setMaxLength(int maxLength) { 763 mMaxLength = maxLength; 764 if (-1 == maxLength) { 765 setFilters(NO_FILTERS); 766 } else { 767 setFilters(new InputFilter[] { 768 new InputFilter.LengthFilter(maxLength) }); 769 } 770 } 771 772 /** 773 * Set the pointer for this node so it can be determined which node this 774 * WebTextView represents. 775 * @param ptr Integer representing the pointer to the node which this 776 * WebTextView represents. 777 */ 778 /* package */ void setNodePointer(int ptr) { 779 mNodePointer = ptr; 780 } 781 782 /** 783 * Determine the position and size of WebTextView, and add it to the 784 * WebView's view heirarchy. All parameters are presumed to be in 785 * view coordinates. Also requests Focus and sets the cursor to not 786 * request to be in view. 787 * @param x x-position of the textfield. 788 * @param y y-position of the textfield. 789 * @param width width of the textfield. 790 * @param height height of the textfield. 791 */ 792 /* package */ void setRect(int x, int y, int width, int height) { 793 LayoutParams lp = (LayoutParams) getLayoutParams(); 794 if (null == lp) { 795 lp = new LayoutParams(width, height, x, y); 796 } else { 797 lp.x = x; 798 lp.y = y; 799 lp.width = width; 800 lp.height = height; 801 } 802 if (getParent() == null) { 803 mWebView.addView(this, lp); 804 } else { 805 setLayoutParams(lp); 806 } 807 // Set up a measure spec so a layout can always be recreated. 808 mWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY); 809 mHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY); 810 } 811 812 /** 813 * Set the selection, and disable our onSelectionChanged action. 814 */ 815 /* package */ void setSelectionFromWebKit(int start, int end) { 816 if (start < 0 || end < 0) return; 817 Spannable text = (Spannable) getText(); 818 int length = text.length(); 819 if (start > length || end > length) return; 820 mFromWebKit = true; 821 Selection.setSelection(text, start, end); 822 mFromWebKit = false; 823 } 824 825 /** 826 * Set the text to the new string, but use the old selection, making sure 827 * to keep it within the new string. 828 * @param text The new text to place in the textfield. 829 */ 830 /* package */ void setTextAndKeepSelection(String text) { 831 mPreChange = text.toString(); 832 Editable edit = (Editable) getText(); 833 int selStart = Selection.getSelectionStart(edit); 834 int selEnd = Selection.getSelectionEnd(edit); 835 mInSetTextAndKeepSelection = true; 836 edit.replace(0, edit.length(), text); 837 int newLength = edit.length(); 838 if (selStart > newLength) selStart = newLength; 839 if (selEnd > newLength) selEnd = newLength; 840 Selection.setSelection(edit, selStart, selEnd); 841 mInSetTextAndKeepSelection = false; 842 updateCachedTextfield(); 843 } 844 845 /** 846 * Called by WebView.rebuildWebTextView(). Based on the type of the <input> 847 * element, set up the WebTextView, its InputType, and IME Options properly. 848 * @param type int corresponding to enum "type" defined in WebView.cpp. 849 * Does not correspond to HTMLInputElement::InputType so this 850 * is unaffected if that changes, and also because that has no 851 * type corresponding to textarea (which is its own tag). 852 */ 853 /* package */ void setType(int type) { 854 if (mWebView == null) return; 855 boolean single = true; 856 boolean inPassword = false; 857 int maxLength = -1; 858 int inputType = EditorInfo.TYPE_CLASS_TEXT; 859 if (mWebView.nativeFocusCandidateHasNextTextfield()) { 860 inputType |= EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT; 861 } 862 int imeOptions = EditorInfo.IME_FLAG_NO_EXTRACT_UI 863 | EditorInfo.IME_FLAG_NO_FULLSCREEN; 864 switch (type) { 865 case 0: // NORMAL_TEXT_FIELD 866 imeOptions |= EditorInfo.IME_ACTION_GO; 867 break; 868 case 1: // TEXT_AREA 869 single = false; 870 inputType = EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE 871 | EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES 872 | EditorInfo.TYPE_CLASS_TEXT 873 | EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT; 874 imeOptions |= EditorInfo.IME_ACTION_NONE; 875 break; 876 case 2: // PASSWORD 877 inPassword = true; 878 imeOptions |= EditorInfo.IME_ACTION_GO; 879 break; 880 case 3: // SEARCH 881 imeOptions |= EditorInfo.IME_ACTION_SEARCH; 882 break; 883 case 4: // EMAIL 884 // TYPE_TEXT_VARIATION_WEB_EDIT_TEXT prevents EMAIL_ADDRESS 885 // from working, so exclude it for now. 886 imeOptions |= EditorInfo.IME_ACTION_GO; 887 break; 888 case 5: // NUMBER 889 inputType |= EditorInfo.TYPE_CLASS_NUMBER; 890 // Number and telephone do not have both a Tab key and an 891 // action, so set the action to NEXT 892 imeOptions |= EditorInfo.IME_ACTION_NEXT; 893 break; 894 case 6: // TELEPHONE 895 inputType |= EditorInfo.TYPE_CLASS_PHONE; 896 imeOptions |= EditorInfo.IME_ACTION_NEXT; 897 break; 898 case 7: // URL 899 // TYPE_TEXT_VARIATION_URI prevents Tab key from showing, so 900 // exclude it for now. 901 imeOptions |= EditorInfo.IME_ACTION_GO; 902 break; 903 default: 904 imeOptions |= EditorInfo.IME_ACTION_GO; 905 break; 906 } 907 setHint(null); 908 if (single) { 909 mWebView.requestLabel(mWebView.nativeFocusCandidateFramePointer(), 910 mNodePointer); 911 maxLength = mWebView.nativeFocusCandidateMaxLength(); 912 if (type != 2 /* PASSWORD */) { 913 String name = mWebView.nativeFocusCandidateName(); 914 if (name != null && name.length() > 0) { 915 mWebView.requestFormData(name, mNodePointer); 916 } 917 } 918 } 919 mSingle = single; 920 setMaxLength(maxLength); 921 setHorizontallyScrolling(single); 922 setInputType(inputType); 923 setImeOptions(imeOptions); 924 setInPassword(inPassword); 925 AutoCompleteAdapter adapter = null; 926 setAdapterCustom(adapter); 927 } 928 929 /** 930 * Update the cache to reflect the current text. 931 */ 932 /* package */ void updateCachedTextfield() { 933 mWebView.updateCachedTextfield(getText().toString()); 934 } 935 936 @Override 937 public boolean requestRectangleOnScreen(Rect rectangle) { 938 // don't scroll while in zoom animation. When it is done, we will adjust 939 // the WebTextView if it is in editing mode. 940 if (!mWebView.inAnimateZoom()) { 941 return super.requestRectangleOnScreen(rectangle); 942 } 943 return false; 944 } 945} 946