WebTextView.java revision e26efa321c66716d58f3e338022caed8852af07e
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 // Whether or not a selection change was generated from webkit. If it was, 88 // we do not need to pass the selection back to webkit. 89 private boolean mFromWebKit; 90 // Whether or not a selection change was generated from the WebTextView 91 // gaining focus. If it is, we do not want to pass it to webkit. This 92 // selection comes from the MovementMethod, but we behave differently. If 93 // WebTextView gained focus from a touch, webkit will determine the 94 // selection. 95 private boolean mFromFocusChange; 96 // Whether or not a selection change was generated from setInputType. We 97 // do not want to pass this change to webkit. 98 private boolean mFromSetInputType; 99 private boolean mGotTouchDown; 100 // Keep track of whether a long press has happened. Only meaningful after 101 // an ACTION_DOWN MotionEvent 102 private boolean mHasPerformedLongClick; 103 private boolean mInSetTextAndKeepSelection; 104 // Array to store the final character added in onTextChanged, so that its 105 // KeyEvents may be determined. 106 private char[] mCharacter = new char[1]; 107 // This is used to reset the length filter when on a textfield 108 // with no max length. 109 // FIXME: This can be replaced with TextView.NO_FILTERS if that 110 // is made public/protected. 111 private static final InputFilter[] NO_FILTERS = new InputFilter[0]; 112 113 /** 114 * Create a new WebTextView. 115 * @param context The Context for this WebTextView. 116 * @param webView The WebView that created this. 117 */ 118 /* package */ WebTextView(Context context, WebView webView) { 119 super(context); 120 mWebView = webView; 121 mMaxLength = -1; 122 } 123 124 @Override 125 public boolean dispatchKeyEvent(KeyEvent event) { 126 if (event.isSystem()) { 127 return super.dispatchKeyEvent(event); 128 } 129 // Treat ACTION_DOWN and ACTION MULTIPLE the same 130 boolean down = event.getAction() != KeyEvent.ACTION_UP; 131 int keyCode = event.getKeyCode(); 132 133 boolean isArrowKey = false; 134 switch(keyCode) { 135 case KeyEvent.KEYCODE_DPAD_LEFT: 136 case KeyEvent.KEYCODE_DPAD_RIGHT: 137 case KeyEvent.KEYCODE_DPAD_UP: 138 case KeyEvent.KEYCODE_DPAD_DOWN: 139 if (!mWebView.nativeCursorMatchesFocus()) { 140 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 141 .onKeyUp(keyCode, event); 142 143 } 144 isArrowKey = true; 145 break; 146 } 147 148 Spannable text = (Spannable) getText(); 149 int oldLength = text.length(); 150 // Normally the delete key's dom events are sent via onTextChanged. 151 // However, if the length is zero, the text did not change, so we 152 // go ahead and pass the key down immediately. 153 if (KeyEvent.KEYCODE_DEL == keyCode && 0 == oldLength) { 154 sendDomEvent(event); 155 return true; 156 } 157 158 if ((mSingle && KeyEvent.KEYCODE_ENTER == keyCode)) { 159 if (isPopupShowing()) { 160 return super.dispatchKeyEvent(event); 161 } 162 if (!down) { 163 // Hide the keyboard, since the user has just submitted this 164 // form. The submission happens thanks to the two calls 165 // to sendDomEvent. 166 InputMethodManager.getInstance(mContext) 167 .hideSoftInputFromWindow(getWindowToken(), 0); 168 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, keyCode)); 169 sendDomEvent(event); 170 } 171 return super.dispatchKeyEvent(event); 172 } else if (KeyEvent.KEYCODE_DPAD_CENTER == keyCode) { 173 // Note that this handles center key and trackball. 174 if (isPopupShowing()) { 175 return super.dispatchKeyEvent(event); 176 } 177 if (!mWebView.nativeCursorMatchesFocus()) { 178 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 179 .onKeyUp(keyCode, event); 180 } 181 // Center key should be passed to a potential onClick 182 if (!down) { 183 mWebView.centerKeyPressOnTextField(); 184 } 185 // Pass to super to handle longpress. 186 return super.dispatchKeyEvent(event); 187 } 188 189 // Ensure there is a layout so arrow keys are handled properly. 190 if (getLayout() == null) { 191 measure(mWidthSpec, mHeightSpec); 192 } 193 int oldStart = Selection.getSelectionStart(text); 194 int oldEnd = Selection.getSelectionEnd(text); 195 196 boolean maxedOut = mMaxLength != -1 && oldLength == mMaxLength; 197 // If we are at max length, and there is a selection rather than a 198 // cursor, we need to store the text to compare later, since the key 199 // may have changed the string. 200 String oldText; 201 if (maxedOut && oldEnd != oldStart) { 202 oldText = text.toString(); 203 } else { 204 oldText = ""; 205 } 206 if (super.dispatchKeyEvent(event)) { 207 // If the WebTextView handled the key it was either an alphanumeric 208 // key, a delete, or a movement within the text. All of those are 209 // ok to pass to javascript. 210 211 // UNLESS there is a max length determined by the html. In that 212 // case, if the string was already at the max length, an 213 // alphanumeric key will be erased by the LengthFilter, 214 // so do not pass down to javascript, and instead 215 // return true. If it is an arrow key or a delete key, we can go 216 // ahead and pass it down. 217 if (KeyEvent.KEYCODE_ENTER == keyCode) { 218 // For multi-line text boxes, newlines will 219 // trigger onTextChanged for key down (which will send both 220 // key up and key down) but not key up. 221 mGotEnterDown = true; 222 } 223 if (maxedOut && !isArrowKey && keyCode != KeyEvent.KEYCODE_DEL) { 224 if (oldEnd == oldStart) { 225 // Return true so the key gets dropped. 226 return true; 227 } else if (!oldText.equals(getText().toString())) { 228 // FIXME: This makes the text work properly, but it 229 // does not pass down the key event, so it may not 230 // work for a textfield that has the type of 231 // behavior of GoogleSuggest. That said, it is 232 // unlikely that a site would combine the two in 233 // one textfield. 234 Spannable span = (Spannable) getText(); 235 int newStart = Selection.getSelectionStart(span); 236 int newEnd = Selection.getSelectionEnd(span); 237 mWebView.replaceTextfieldText(0, oldLength, span.toString(), 238 newStart, newEnd); 239 return true; 240 } 241 } 242 /* FIXME: 243 * In theory, we would like to send the events for the arrow keys. 244 * However, the TextView can arbitrarily change the selection (i.e. 245 * long press followed by using the trackball). Therefore, we keep 246 * in sync with the TextView via onSelectionChanged. If we also 247 * send the DOM event, we lose the correct selection. 248 if (isArrowKey) { 249 // Arrow key does not change the text, but we still want to send 250 // the DOM events. 251 sendDomEvent(event); 252 } 253 */ 254 return true; 255 } 256 // Ignore the key up event for newlines. This prevents 257 // multiple newlines in the native textarea. 258 if (mGotEnterDown && !down) { 259 return true; 260 } 261 // if it is a navigation key, pass it to WebView 262 if (isArrowKey) { 263 // WebView check the trackballtime in onKeyDown to avoid calling 264 // native from both trackball and key handling. As this is called 265 // from WebTextView, we always want WebView to check with native. 266 // Reset trackballtime to ensure it. 267 mWebView.resetTrackballTime(); 268 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 269 .onKeyUp(keyCode, event); 270 } 271 return false; 272 } 273 274 /** 275 * Determine whether this WebTextView currently represents the node 276 * represented by ptr. 277 * @param ptr Pointer to a node to compare to. 278 * @return boolean Whether this WebTextView already represents the node 279 * pointed to by ptr. 280 */ 281 /* package */ boolean isSameTextField(int ptr) { 282 return ptr == mNodePointer; 283 } 284 285 @Override public InputConnection onCreateInputConnection( 286 EditorInfo outAttrs) { 287 InputConnection connection = super.onCreateInputConnection(outAttrs); 288 if (mWebView != null) { 289 // Use the name of the textfield + the url. Use backslash as an 290 // arbitrary separator. 291 outAttrs.fieldName = mWebView.nativeFocusCandidateName() + "\\" 292 + mWebView.getUrl(); 293 } 294 return connection; 295 } 296 297 @Override 298 public void onEditorAction(int actionCode) { 299 switch (actionCode) { 300 case EditorInfo.IME_ACTION_NEXT: 301 // Since the cursor will no longer be in the same place as the 302 // focus, set the focus controller back to inactive 303 mWebView.setFocusControllerInactive(); 304 mWebView.nativeMoveCursorToNextTextInput(); 305 // Preemptively rebuild the WebTextView, so that the action will 306 // be set properly. 307 mWebView.rebuildWebTextView(); 308 setDefaultSelection(); 309 mWebView.invalidate(); 310 break; 311 case EditorInfo.IME_ACTION_DONE: 312 super.onEditorAction(actionCode); 313 break; 314 case EditorInfo.IME_ACTION_GO: 315 case EditorInfo.IME_ACTION_SEARCH: 316 // Send an enter and hide the soft keyboard 317 InputMethodManager.getInstance(mContext) 318 .hideSoftInputFromWindow(getWindowToken(), 0); 319 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 320 KeyEvent.KEYCODE_ENTER)); 321 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 322 KeyEvent.KEYCODE_ENTER)); 323 324 default: 325 break; 326 } 327 } 328 329 @Override 330 protected void onFocusChanged(boolean focused, int direction, 331 Rect previouslyFocusedRect) { 332 mFromFocusChange = true; 333 super.onFocusChanged(focused, direction, previouslyFocusedRect); 334 mFromFocusChange = false; 335 } 336 337 @Override 338 protected void onSelectionChanged(int selStart, int selEnd) { 339 // This code is copied from TextView.onDraw(). That code does not get 340 // executed, however, because the WebTextView does not draw, allowing 341 // webkit's drawing to show through. 342 InputMethodManager imm = InputMethodManager.peekInstance(); 343 if (imm != null && imm.isActive(this)) { 344 Spannable sp = (Spannable) getText(); 345 int candStart = EditableInputConnection.getComposingSpanStart(sp); 346 int candEnd = EditableInputConnection.getComposingSpanEnd(sp); 347 imm.updateSelection(this, selStart, selEnd, candStart, candEnd); 348 } 349 if (!mFromWebKit && !mFromFocusChange && !mFromSetInputType 350 && mWebView != null) { 351 if (DebugFlags.WEB_TEXT_VIEW) { 352 Log.v(LOGTAG, "onSelectionChanged selStart=" + selStart 353 + " selEnd=" + selEnd); 354 } 355 mWebView.setSelection(selStart, selEnd); 356 } 357 } 358 359 @Override 360 protected void onTextChanged(CharSequence s,int start,int before,int count){ 361 super.onTextChanged(s, start, before, count); 362 String postChange = s.toString(); 363 // Prevent calls to setText from invoking onTextChanged (since this will 364 // mean we are on a different textfield). Also prevent the change when 365 // going from a textfield with a string of text to one with a smaller 366 // limit on text length from registering the onTextChanged event. 367 if (mPreChange == null || mPreChange.equals(postChange) || 368 (mMaxLength > -1 && mPreChange.length() > mMaxLength && 369 mPreChange.substring(0, mMaxLength).equals(postChange))) { 370 return; 371 } 372 mPreChange = postChange; 373 // This was simply a delete or a cut, so just delete the selection. 374 if (before > 0 && 0 == count) { 375 mWebView.deleteSelection(start, start + before); 376 // For this and all changes to the text, update our cache 377 updateCachedTextfield(); 378 return; 379 } 380 // Find the last character being replaced. If it can be represented by 381 // events, we will pass them to native (after replacing the beginning 382 // of the changed text), so we can see javascript events. 383 // Otherwise, replace the text being changed (including the last 384 // character) in the textfield. 385 TextUtils.getChars(s, start + count - 1, start + count, mCharacter, 0); 386 KeyCharacterMap kmap = 387 KeyCharacterMap.load(KeyCharacterMap.BUILT_IN_KEYBOARD); 388 KeyEvent[] events = kmap.getEvents(mCharacter); 389 boolean cannotUseKeyEvents = null == events; 390 int charactersFromKeyEvents = cannotUseKeyEvents ? 0 : 1; 391 if (count > 1 || cannotUseKeyEvents) { 392 String replace = s.subSequence(start, 393 start + count - charactersFromKeyEvents).toString(); 394 mWebView.replaceTextfieldText(start, start + before, replace, 395 start + count - charactersFromKeyEvents, 396 start + count - charactersFromKeyEvents); 397 } else { 398 // This corrects the selection which may have been affected by the 399 // trackball or auto-correct. 400 if (DebugFlags.WEB_TEXT_VIEW) { 401 Log.v(LOGTAG, "onTextChanged start=" + start 402 + " start + before=" + (start + before)); 403 } 404 if (!mInSetTextAndKeepSelection) { 405 mWebView.setSelection(start, start + before); 406 } 407 } 408 if (!cannotUseKeyEvents) { 409 int length = events.length; 410 for (int i = 0; i < length; i++) { 411 // We never send modifier keys to native code so don't send them 412 // here either. 413 if (!KeyEvent.isModifierKey(events[i].getKeyCode())) { 414 sendDomEvent(events[i]); 415 } 416 } 417 } 418 updateCachedTextfield(); 419 } 420 421 @Override 422 public boolean onTouchEvent(MotionEvent event) { 423 switch (event.getAction()) { 424 case MotionEvent.ACTION_DOWN: 425 super.onTouchEvent(event); 426 // This event may be the start of a drag, so store it to pass to the 427 // WebView if it is. 428 mDragStartX = event.getX(); 429 mDragStartY = event.getY(); 430 mDragStartTime = event.getEventTime(); 431 mDragSent = false; 432 mScrolled = false; 433 mGotTouchDown = true; 434 mHasPerformedLongClick = false; 435 break; 436 case MotionEvent.ACTION_MOVE: 437 if (mHasPerformedLongClick) { 438 mGotTouchDown = false; 439 return false; 440 } 441 int slop = ViewConfiguration.get(mContext).getScaledTouchSlop(); 442 Spannable buffer = getText(); 443 int initialScrollX = Touch.getInitialScrollX(this, buffer); 444 int initialScrollY = Touch.getInitialScrollY(this, buffer); 445 super.onTouchEvent(event); 446 int dx = Math.abs(mScrollX - initialScrollX); 447 int dy = Math.abs(mScrollY - initialScrollY); 448 // Use a smaller slop when checking to see if we've moved far enough 449 // to scroll the text, because experimentally, slop has shown to be 450 // to big for the case of a small textfield. 451 int smallerSlop = slop/2; 452 if (dx > smallerSlop || dy > smallerSlop) { 453 if (mWebView != null) { 454 float maxScrollX = (float) Touch.getMaxScrollX(this, 455 getLayout(), mScrollY); 456 if (DebugFlags.WEB_TEXT_VIEW) { 457 Log.v(LOGTAG, "onTouchEvent x=" + mScrollX + " y=" 458 + mScrollY + " maxX=" + maxScrollX); 459 } 460 mWebView.scrollFocusedTextInput(maxScrollX > 0 ? 461 mScrollX / maxScrollX : 0, mScrollY); 462 } 463 mScrolled = true; 464 cancelLongPress(); 465 return true; 466 } 467 if (Math.abs((int) event.getX() - mDragStartX) < slop 468 && Math.abs((int) event.getY() - mDragStartY) < slop) { 469 // If the user has not scrolled further than slop, we should not 470 // send the drag. Instead, do nothing, and when the user lifts 471 // their finger, we will change the selection. 472 return true; 473 } 474 if (mWebView != null) { 475 // Only want to set the initial state once. 476 if (!mDragSent) { 477 mWebView.initiateTextFieldDrag(mDragStartX, mDragStartY, 478 mDragStartTime); 479 mDragSent = true; 480 } 481 boolean scrolled = mWebView.textFieldDrag(event); 482 if (scrolled) { 483 mScrolled = true; 484 cancelLongPress(); 485 return true; 486 } 487 } 488 return false; 489 case MotionEvent.ACTION_UP: 490 case MotionEvent.ACTION_CANCEL: 491 if (mHasPerformedLongClick) { 492 mGotTouchDown = false; 493 return false; 494 } 495 if (!mScrolled) { 496 // If the page scrolled, or the TextView scrolled, we do not 497 // want to change the selection 498 cancelLongPress(); 499 if (mGotTouchDown && mWebView != null) { 500 mWebView.touchUpOnTextField(event); 501 } 502 } 503 // Necessary for the WebView to reset its state 504 if (mWebView != null && mDragSent) { 505 mWebView.onTouchEvent(event); 506 } 507 mGotTouchDown = false; 508 break; 509 default: 510 break; 511 } 512 return true; 513 } 514 515 @Override 516 public boolean onTrackballEvent(MotionEvent event) { 517 if (isPopupShowing()) { 518 return super.onTrackballEvent(event); 519 } 520 if (event.getAction() != MotionEvent.ACTION_MOVE) { 521 return false; 522 } 523 // If the Cursor is not on the text input, webview should handle the 524 // trackball 525 if (!mWebView.nativeCursorMatchesFocus()) { 526 return mWebView.onTrackballEvent(event); 527 } 528 Spannable text = (Spannable) getText(); 529 MovementMethod move = getMovementMethod(); 530 if (move != null && getLayout() != null && 531 move.onTrackballEvent(this, text, event)) { 532 // Selection is changed in onSelectionChanged 533 return true; 534 } 535 return false; 536 } 537 538 @Override 539 public boolean performLongClick() { 540 mHasPerformedLongClick = true; 541 return super.performLongClick(); 542 } 543 544 /** 545 * Remove this WebTextView from its host WebView, and return 546 * focus to the host. 547 */ 548 /* package */ void remove() { 549 // hide the soft keyboard when the edit text is out of focus 550 InputMethodManager.getInstance(mContext).hideSoftInputFromWindow( 551 getWindowToken(), 0); 552 mWebView.removeView(this); 553 mWebView.requestFocus(); 554 } 555 556 /* package */ void bringIntoView() { 557 if (getLayout() != null) { 558 bringPointIntoView(Selection.getSelectionEnd(getText())); 559 } 560 } 561 562 /** 563 * Send the DOM events for the specified event. 564 * @param event KeyEvent to be translated into a DOM event. 565 */ 566 private void sendDomEvent(KeyEvent event) { 567 mWebView.passToJavaScript(getText().toString(), event); 568 } 569 570 /** 571 * Always use this instead of setAdapter, as this has features specific to 572 * the WebTextView. 573 */ 574 public void setAdapterCustom(AutoCompleteAdapter adapter) { 575 if (adapter != null) { 576 setInputType(getInputType() 577 | EditorInfo.TYPE_TEXT_FLAG_AUTO_COMPLETE); 578 adapter.setTextView(this); 579 } 580 super.setAdapter(adapter); 581 } 582 583 /** 584 * This is a special version of ArrayAdapter which changes its text size 585 * to match the text size of its host TextView. 586 */ 587 public static class AutoCompleteAdapter extends ArrayAdapter<String> { 588 private TextView mTextView; 589 590 public AutoCompleteAdapter(Context context, ArrayList<String> entries) { 591 super(context, com.android.internal.R.layout 592 .search_dropdown_item_1line, entries); 593 } 594 595 /** 596 * {@inheritDoc} 597 */ 598 public View getView(int position, View convertView, ViewGroup parent) { 599 TextView tv = 600 (TextView) super.getView(position, convertView, parent); 601 if (tv != null && mTextView != null) { 602 tv.setTextSize(mTextView.getTextSize()); 603 } 604 return tv; 605 } 606 607 /** 608 * Set the TextView so we can match its text size. 609 */ 610 private void setTextView(TextView tv) { 611 mTextView = tv; 612 } 613 } 614 615 /** 616 * Sets the selection when the user clicks on a textfield or textarea with 617 * the trackball or center key, or starts typing into it without clicking on 618 * it. 619 */ 620 /* package */ void setDefaultSelection() { 621 Spannable text = (Spannable) getText(); 622 int selection = mSingle ? text.length() : 0; 623 if (Selection.getSelectionStart(text) == selection 624 && Selection.getSelectionEnd(text) == selection) { 625 // The selection of the UI copy is set correctly, but the 626 // WebTextView still needs to inform the webkit thread to set the 627 // selection. Normally that is done in onSelectionChanged, but 628 // onSelectionChanged will not be called because the UI copy is not 629 // changing. (This can happen when the WebTextView takes focus. 630 // That onSelectionChanged was blocked because the selection set 631 // when focusing is not necessarily the desirable selection for 632 // WebTextView.) 633 if (mWebView != null) { 634 mWebView.setSelection(selection, selection); 635 } 636 } else { 637 Selection.setSelection(text, selection, selection); 638 } 639 } 640 641 /** 642 * Determine whether to use the system-wide password disguising method, 643 * or to use none. 644 * @param inPassword True if the textfield is a password field. 645 */ 646 /* package */ void setInPassword(boolean inPassword) { 647 if (inPassword) { 648 setInputType(EditorInfo.TYPE_CLASS_TEXT | EditorInfo. 649 TYPE_TEXT_VARIATION_PASSWORD); 650 createBackground(); 651 } 652 // For password fields, draw the WebTextView. For others, just show 653 // webkit's drawing. 654 setWillNotDraw(!inPassword); 655 setBackgroundDrawable(inPassword ? mBackground : null); 656 // For non-password fields, avoid the invals from TextView's blinking 657 // cursor 658 setCursorVisible(inPassword); 659 } 660 661 /** 662 * Private class used for the background of a password textfield. 663 */ 664 private static class OutlineDrawable extends Drawable { 665 public void draw(Canvas canvas) { 666 Rect bounds = getBounds(); 667 Paint paint = new Paint(); 668 paint.setAntiAlias(true); 669 // Draw the background. 670 paint.setColor(Color.WHITE); 671 canvas.drawRect(bounds, paint); 672 // Draw the outline. 673 paint.setStyle(Paint.Style.STROKE); 674 paint.setColor(Color.BLACK); 675 canvas.drawRect(bounds, paint); 676 } 677 // Always want it to be opaque. 678 public int getOpacity() { 679 return PixelFormat.OPAQUE; 680 } 681 // These are needed because they are abstract in Drawable. 682 public void setAlpha(int alpha) { } 683 public void setColorFilter(ColorFilter cf) { } 684 } 685 686 /** 687 * Create a background for the WebTextView and set up the paint for drawing 688 * the text. This way, we can see the password transformation of the 689 * system, which (optionally) shows the actual text before changing to dots. 690 * The background is necessary to hide the webkit-drawn text beneath. 691 */ 692 private void createBackground() { 693 if (mBackground != null) { 694 return; 695 } 696 mBackground = new OutlineDrawable(); 697 698 setGravity(Gravity.CENTER_VERTICAL); 699 // Turn on subpixel text, and turn off kerning, so it better matches 700 // the text in webkit. 701 TextPaint paint = getPaint(); 702 int flags = paint.getFlags() | Paint.SUBPIXEL_TEXT_FLAG | 703 Paint.ANTI_ALIAS_FLAG & ~Paint.DEV_KERN_TEXT_FLAG; 704 paint.setFlags(flags); 705 // Set the text color to black, regardless of the theme. This ensures 706 // that other applications that use embedded WebViews will properly 707 // display the text in password textfields. 708 setTextColor(Color.BLACK); 709 } 710 711 @Override 712 public void setInputType(int type) { 713 mFromSetInputType = true; 714 super.setInputType(type); 715 mFromSetInputType = false; 716 } 717 718 private void setMaxLength(int maxLength) { 719 mMaxLength = maxLength; 720 if (-1 == maxLength) { 721 setFilters(NO_FILTERS); 722 } else { 723 setFilters(new InputFilter[] { 724 new InputFilter.LengthFilter(maxLength) }); 725 } 726 } 727 728 /** 729 * Set the pointer for this node so it can be determined which node this 730 * WebTextView represents. 731 * @param ptr Integer representing the pointer to the node which this 732 * WebTextView represents. 733 */ 734 /* package */ void setNodePointer(int ptr) { 735 mNodePointer = ptr; 736 } 737 738 /** 739 * Determine the position and size of WebTextView, and add it to the 740 * WebView's view heirarchy. All parameters are presumed to be in 741 * view coordinates. Also requests Focus and sets the cursor to not 742 * request to be in view. 743 * @param x x-position of the textfield. 744 * @param y y-position of the textfield. 745 * @param width width of the textfield. 746 * @param height height of the textfield. 747 */ 748 /* package */ void setRect(int x, int y, int width, int height) { 749 LayoutParams lp = (LayoutParams) getLayoutParams(); 750 if (null == lp) { 751 lp = new LayoutParams(width, height, x, y); 752 } else { 753 lp.x = x; 754 lp.y = y; 755 lp.width = width; 756 lp.height = height; 757 } 758 if (getParent() == null) { 759 mWebView.addView(this, lp); 760 } else { 761 setLayoutParams(lp); 762 } 763 // Set up a measure spec so a layout can always be recreated. 764 mWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY); 765 mHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY); 766 } 767 768 /** 769 * Set the selection, and disable our onSelectionChanged action. 770 */ 771 /* package */ void setSelectionFromWebKit(int start, int end) { 772 if (start < 0 || end < 0) return; 773 Spannable text = (Spannable) getText(); 774 int length = text.length(); 775 if (start > length || end > length) return; 776 mFromWebKit = true; 777 Selection.setSelection(text, start, end); 778 mFromWebKit = false; 779 } 780 781 /** 782 * Set the text to the new string, but use the old selection, making sure 783 * to keep it within the new string. 784 * @param text The new text to place in the textfield. 785 */ 786 /* package */ void setTextAndKeepSelection(String text) { 787 mPreChange = text.toString(); 788 Editable edit = (Editable) getText(); 789 mInSetTextAndKeepSelection = true; 790 edit.replace(0, edit.length(), text); 791 mInSetTextAndKeepSelection = false; 792 updateCachedTextfield(); 793 } 794 795 /** 796 * Called by WebView.rebuildWebTextView(). Based on the type of the <input> 797 * element, set up the WebTextView, its InputType, and IME Options properly. 798 * @param type int corresponding to enum "type" defined in WebView.cpp. 799 * Does not correspond to HTMLInputElement::InputType so this 800 * is unaffected if that changes, and also because that has no 801 * type corresponding to textarea (which is its own tag). 802 */ 803 /* package */ void setType(int type) { 804 if (mWebView == null) return; 805 boolean single = true; 806 boolean inPassword = false; 807 int maxLength = -1; 808 int inputType = EditorInfo.TYPE_CLASS_TEXT 809 | EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT; 810 switch (type) { 811 case 1: // TEXT_AREA 812 single = false; 813 inputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE 814 | EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES 815 | EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT; 816 setImeOptions(EditorInfo.IME_ACTION_NONE); 817 break; 818 case 2: // PASSWORD 819 inPassword = true; 820 break; 821 case 3: // SEARCH 822 setImeOptions(EditorInfo.IME_ACTION_SEARCH); 823 break; 824 case 4: // EMAIL 825 // TYPE_TEXT_VARIATION_WEB_EDIT_TEXT prevents EMAIL_ADDRESS 826 // from working, so exclude it for now. 827 inputType = EditorInfo.TYPE_CLASS_TEXT 828 | EditorInfo.TYPE_TEXT_VARIATION_EMAIL_ADDRESS; 829 break; 830 case 5: // NUMBER 831 inputType = EditorInfo.TYPE_CLASS_NUMBER; 832 break; 833 case 6: // TELEPHONE 834 inputType = EditorInfo.TYPE_CLASS_PHONE; 835 break; 836 case 7: // URL 837 // TYPE_TEXT_VARIATION_WEB_EDIT_TEXT prevents URI 838 // from working, so exclude it for now. 839 inputType = EditorInfo.TYPE_CLASS_TEXT 840 | EditorInfo.TYPE_TEXT_VARIATION_URI; 841 break; 842 default: 843 break; 844 } 845 if (single) { 846 maxLength = mWebView.nativeFocusCandidateMaxLength(); 847 if (type != 2 /* PASSWORD */) { 848 String name = mWebView.nativeFocusCandidateName(); 849 if (name != null && name.length() > 0) { 850 mWebView.requestFormData(name, mNodePointer); 851 } 852 } 853 if (type != 3 /* SEARCH */) { 854 int action = mWebView.nativeTextFieldAction(); 855 switch (action) { 856 // Keep in sync with CachedRoot::ImeAction 857 case 0: // NEXT 858 setImeOptions(EditorInfo.IME_ACTION_NEXT); 859 break; 860 case 1: // GO 861 setImeOptions(EditorInfo.IME_ACTION_GO); 862 break; 863 case -1: // FAILURE 864 case 2: // DONE 865 setImeOptions(EditorInfo.IME_ACTION_DONE); 866 break; 867 } 868 } 869 } 870 mSingle = single; 871 setMaxLength(maxLength); 872 setHorizontallyScrolling(single); 873 setInputType(inputType); 874 setInPassword(inPassword); 875 AutoCompleteAdapter adapter = null; 876 setAdapterCustom(adapter); 877 } 878 879 /** 880 * Update the cache to reflect the current text. 881 */ 882 /* package */ void updateCachedTextfield() { 883 mWebView.updateCachedTextfield(getText().toString()); 884 } 885 886 @Override 887 public boolean requestRectangleOnScreen(Rect rectangle) { 888 // don't scroll while in zoom animation. When it is done, we will adjust 889 // the WebTextView if it is in editing mode. 890 if (!mWebView.inAnimateZoom()) { 891 return super.requestRectangleOnScreen(rectangle); 892 } 893 return false; 894 } 895} 896