WebTextView.java revision bb107bd6f7981cd2b2e31a0afc6f6bf2a6d5118f
1/* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.webkit; 18 19import com.android.internal.widget.EditableInputConnection; 20 21import android.content.Context; 22import android.graphics.Canvas; 23import android.graphics.Color; 24import android.graphics.ColorFilter; 25import android.graphics.Paint; 26import android.graphics.PixelFormat; 27import android.graphics.Rect; 28import android.graphics.drawable.Drawable; 29import android.text.Editable; 30import android.text.InputFilter; 31import android.text.Selection; 32import android.text.Spannable; 33import android.text.TextPaint; 34import android.text.TextUtils; 35import android.text.method.MovementMethod; 36import android.text.method.Touch; 37import android.util.Log; 38import android.view.Gravity; 39import android.view.KeyCharacterMap; 40import android.view.KeyEvent; 41import android.view.MotionEvent; 42import android.view.View; 43import android.view.ViewConfiguration; 44import android.view.ViewGroup; 45import android.view.inputmethod.EditorInfo; 46import android.view.inputmethod.InputMethodManager; 47import android.view.inputmethod.InputConnection; 48import android.widget.AbsoluteLayout.LayoutParams; 49import android.widget.ArrayAdapter; 50import android.widget.AutoCompleteTextView; 51import android.widget.TextView; 52 53import java.util.ArrayList; 54 55/** 56 * WebTextView is a specialized version of EditText used by WebView 57 * to overlay html textfields (and textareas) to use our standard 58 * text editing. 59 */ 60/* package */ class WebTextView extends AutoCompleteTextView { 61 62 static final String LOGTAG = "webtextview"; 63 64 private WebView mWebView; 65 private boolean mSingle; 66 private int mWidthSpec; 67 private int mHeightSpec; 68 private int mNodePointer; 69 // FIXME: This is a hack for blocking unmatched key ups, in particular 70 // on the enter key. The method for blocking unmatched key ups prevents 71 // the shift key from working properly. 72 private boolean mGotEnterDown; 73 private int mMaxLength; 74 // Keep track of the text before the change so we know whether we actually 75 // need to send down the DOM events. 76 private String mPreChange; 77 private Drawable mBackground; 78 // Variables for keeping track of the touch down, to send to the WebView 79 // when a drag starts 80 private float mDragStartX; 81 private float mDragStartY; 82 private long mDragStartTime; 83 private boolean mDragSent; 84 // True if the most recent drag event has caused either the TextView to 85 // scroll or the web page to scroll. Gets reset after a touch down. 86 private boolean mScrolled; 87 // Gets set to true any time the WebTextView has focus, but the navigation 88 // cache does not yet know that the focus has been changed. This happens 89 // if the user presses "Next", if the user moves the cursor to a textfield 90 // and starts typing or clicks the trackball/center key, and when the user 91 // touches a textfield. 92 boolean mOkayForFocusNotToMatch; 93 // Whether or not a selection change was generated from webkit. If it was, 94 // we do not need to pass the selection back to webkit. 95 private boolean mFromWebKit; 96 // Whether or not a selection change was generated from the WebTextView 97 // gaining focus. If it is, we do not want to pass it to webkit. This 98 // selection comes from the MovementMethod, but we behave differently. If 99 // WebTextView gained focus from a touch, webkit will determine the 100 // selection. 101 private boolean mFromFocusChange; 102 // Whether or not a selection change was generated from setInputType. We 103 // do not want to pass this change to webkit. 104 private boolean mFromSetInputType; 105 private boolean mGotTouchDown; 106 private boolean mInSetTextAndKeepSelection; 107 // Array to store the final character added in onTextChanged, so that its 108 // KeyEvents may be determined. 109 private char[] mCharacter = new char[1]; 110 // This is used to reset the length filter when on a textfield 111 // with no max length. 112 // FIXME: This can be replaced with TextView.NO_FILTERS if that 113 // is made public/protected. 114 private static final InputFilter[] NO_FILTERS = new InputFilter[0]; 115 116 /** 117 * Create a new WebTextView. 118 * @param context The Context for this WebTextView. 119 * @param webView The WebView that created this. 120 */ 121 /* package */ WebTextView(Context context, WebView webView) { 122 super(context); 123 mWebView = webView; 124 mMaxLength = -1; 125 } 126 127 @Override 128 public boolean dispatchKeyEvent(KeyEvent event) { 129 if (event.isSystem()) { 130 return super.dispatchKeyEvent(event); 131 } 132 // Treat ACTION_DOWN and ACTION MULTIPLE the same 133 boolean down = event.getAction() != KeyEvent.ACTION_UP; 134 int keyCode = event.getKeyCode(); 135 136 boolean isArrowKey = false; 137 switch(keyCode) { 138 case KeyEvent.KEYCODE_DPAD_LEFT: 139 case KeyEvent.KEYCODE_DPAD_RIGHT: 140 case KeyEvent.KEYCODE_DPAD_UP: 141 case KeyEvent.KEYCODE_DPAD_DOWN: 142 if (!mWebView.nativeCursorMatchesFocus()) { 143 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 144 .onKeyUp(keyCode, event); 145 146 } 147 isArrowKey = true; 148 break; 149 } 150 151 if (down) { 152 if (mOkayForFocusNotToMatch) { 153 if (mWebView.nativeFocusNodePointer() == mNodePointer) { 154 mOkayForFocusNotToMatch = false; 155 } 156 } else if (mWebView.nativeFocusNodePointer() != mNodePointer 157 && !isArrowKey) { 158 mWebView.nativeClearCursor(); 159 // Do not call remove() here, which hides the soft keyboard. If 160 // the soft keyboard is being displayed, the user will still want 161 // it there. 162 mWebView.removeView(this); 163 mWebView.requestFocus(); 164 return mWebView.dispatchKeyEvent(event); 165 } 166 } 167 Spannable text = (Spannable) getText(); 168 int oldLength = text.length(); 169 // Normally the delete key's dom events are sent via onTextChanged. 170 // However, if the length is zero, the text did not change, so we 171 // go ahead and pass the key down immediately. 172 if (KeyEvent.KEYCODE_DEL == keyCode && 0 == oldLength) { 173 sendDomEvent(event); 174 return true; 175 } 176 177 if ((mSingle && KeyEvent.KEYCODE_ENTER == keyCode)) { 178 if (isPopupShowing()) { 179 return super.dispatchKeyEvent(event); 180 } 181 if (!down) { 182 // Hide the keyboard, since the user has just submitted this 183 // form. The submission happens thanks to the two calls 184 // to sendDomEvent. 185 InputMethodManager.getInstance(mContext) 186 .hideSoftInputFromWindow(getWindowToken(), 0); 187 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, keyCode)); 188 sendDomEvent(event); 189 } 190 return super.dispatchKeyEvent(event); 191 } else if (KeyEvent.KEYCODE_DPAD_CENTER == keyCode) { 192 // Note that this handles center key and trackball. 193 if (isPopupShowing()) { 194 return super.dispatchKeyEvent(event); 195 } 196 if (!mWebView.nativeCursorMatchesFocus()) { 197 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 198 .onKeyUp(keyCode, event); 199 } 200 // Center key should be passed to a potential onClick 201 if (!down) { 202 mWebView.centerKeyPressOnTextField(); 203 } 204 // Pass to super to handle longpress. 205 return super.dispatchKeyEvent(event); 206 } 207 208 // Ensure there is a layout so arrow keys are handled properly. 209 if (getLayout() == null) { 210 measure(mWidthSpec, mHeightSpec); 211 } 212 int oldStart = Selection.getSelectionStart(text); 213 int oldEnd = Selection.getSelectionEnd(text); 214 215 boolean maxedOut = mMaxLength != -1 && oldLength == mMaxLength; 216 // If we are at max length, and there is a selection rather than a 217 // cursor, we need to store the text to compare later, since the key 218 // may have changed the string. 219 String oldText; 220 if (maxedOut && oldEnd != oldStart) { 221 oldText = text.toString(); 222 } else { 223 oldText = ""; 224 } 225 if (super.dispatchKeyEvent(event)) { 226 // If the WebTextView handled the key it was either an alphanumeric 227 // key, a delete, or a movement within the text. All of those are 228 // ok to pass to javascript. 229 230 // UNLESS there is a max length determined by the html. In that 231 // case, if the string was already at the max length, an 232 // alphanumeric key will be erased by the LengthFilter, 233 // so do not pass down to javascript, and instead 234 // return true. If it is an arrow key or a delete key, we can go 235 // ahead and pass it down. 236 if (KeyEvent.KEYCODE_ENTER == keyCode) { 237 // For multi-line text boxes, newlines will 238 // trigger onTextChanged for key down (which will send both 239 // key up and key down) but not key up. 240 mGotEnterDown = true; 241 } 242 if (maxedOut && !isArrowKey && keyCode != KeyEvent.KEYCODE_DEL) { 243 if (oldEnd == oldStart) { 244 // Return true so the key gets dropped. 245 return true; 246 } else if (!oldText.equals(getText().toString())) { 247 // FIXME: This makes the text work properly, but it 248 // does not pass down the key event, so it may not 249 // work for a textfield that has the type of 250 // behavior of GoogleSuggest. That said, it is 251 // unlikely that a site would combine the two in 252 // one textfield. 253 Spannable span = (Spannable) getText(); 254 int newStart = Selection.getSelectionStart(span); 255 int newEnd = Selection.getSelectionEnd(span); 256 mWebView.replaceTextfieldText(0, oldLength, span.toString(), 257 newStart, newEnd); 258 return true; 259 } 260 } 261 /* FIXME: 262 * In theory, we would like to send the events for the arrow keys. 263 * However, the TextView can arbitrarily change the selection (i.e. 264 * long press followed by using the trackball). Therefore, we keep 265 * in sync with the TextView via onSelectionChanged. If we also 266 * send the DOM event, we lose the correct selection. 267 if (isArrowKey) { 268 // Arrow key does not change the text, but we still want to send 269 // the DOM events. 270 sendDomEvent(event); 271 } 272 */ 273 return true; 274 } 275 // Ignore the key up event for newlines. This prevents 276 // multiple newlines in the native textarea. 277 if (mGotEnterDown && !down) { 278 return true; 279 } 280 // if it is a navigation key, pass it to WebView 281 if (isArrowKey) { 282 // WebView check the trackballtime in onKeyDown to avoid calling 283 // native from both trackball and key handling. As this is called 284 // from WebTextView, we always want WebView to check with native. 285 // Reset trackballtime to ensure it. 286 mWebView.resetTrackballTime(); 287 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 288 .onKeyUp(keyCode, event); 289 } 290 return false; 291 } 292 293 /** 294 * Determine whether this WebTextView currently represents the node 295 * represented by ptr. 296 * @param ptr Pointer to a node to compare to. 297 * @return boolean Whether this WebTextView already represents the node 298 * pointed to by ptr. 299 */ 300 /* package */ boolean isSameTextField(int ptr) { 301 return ptr == mNodePointer; 302 } 303 304 @Override public InputConnection onCreateInputConnection( 305 EditorInfo outAttrs) { 306 InputConnection connection = super.onCreateInputConnection(outAttrs); 307 if (mWebView != null) { 308 // Use the name of the textfield + the url. Use backslash as an 309 // arbitrary separator. 310 outAttrs.fieldName = mWebView.nativeFocusCandidateName() + "\\" 311 + mWebView.getUrl(); 312 } 313 return connection; 314 } 315 316 @Override 317 public void onEditorAction(int actionCode) { 318 switch (actionCode) { 319 case EditorInfo.IME_ACTION_NEXT: 320 // Since the cursor will no longer be in the same place as the 321 // focus, set the focus controller back to inactive 322 mWebView.setFocusControllerInactive(); 323 mWebView.nativeMoveCursorToNextTextInput(); 324 mOkayForFocusNotToMatch = true; 325 // Pass the click to set the focus to the textfield which will now 326 // have the cursor. 327 mWebView.centerKeyPressOnTextField(); 328 // Preemptively rebuild the WebTextView, so that the action will 329 // be set properly. 330 mWebView.rebuildWebTextView(); 331 setDefaultSelection(); 332 mWebView.invalidate(); 333 break; 334 case EditorInfo.IME_ACTION_DONE: 335 super.onEditorAction(actionCode); 336 break; 337 case EditorInfo.IME_ACTION_GO: 338 // Send an enter and hide the soft keyboard 339 InputMethodManager.getInstance(mContext) 340 .hideSoftInputFromWindow(getWindowToken(), 0); 341 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 342 KeyEvent.KEYCODE_ENTER)); 343 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 344 KeyEvent.KEYCODE_ENTER)); 345 346 default: 347 break; 348 } 349 } 350 351 @Override 352 protected void onFocusChanged(boolean focused, int direction, 353 Rect previouslyFocusedRect) { 354 mFromFocusChange = true; 355 super.onFocusChanged(focused, direction, previouslyFocusedRect); 356 mFromFocusChange = false; 357 } 358 359 @Override 360 protected void onSelectionChanged(int selStart, int selEnd) { 361 // This code is copied from TextView.onDraw(). That code does not get 362 // executed, however, because the WebTextView does not draw, allowing 363 // webkit's drawing to show through. 364 InputMethodManager imm = InputMethodManager.peekInstance(); 365 if (imm != null && imm.isActive(this)) { 366 Spannable sp = (Spannable) getText(); 367 int candStart = EditableInputConnection.getComposingSpanStart(sp); 368 int candEnd = EditableInputConnection.getComposingSpanEnd(sp); 369 imm.updateSelection(this, selStart, selEnd, candStart, candEnd); 370 } 371 if (!mFromWebKit && !mFromFocusChange && !mFromSetInputType 372 && mWebView != null) { 373 if (DebugFlags.WEB_TEXT_VIEW) { 374 Log.v(LOGTAG, "onSelectionChanged selStart=" + selStart 375 + " selEnd=" + selEnd); 376 } 377 mWebView.setSelection(selStart, selEnd); 378 } 379 } 380 381 @Override 382 protected void onTextChanged(CharSequence s,int start,int before,int count){ 383 super.onTextChanged(s, start, before, count); 384 String postChange = s.toString(); 385 // Prevent calls to setText from invoking onTextChanged (since this will 386 // mean we are on a different textfield). Also prevent the change when 387 // going from a textfield with a string of text to one with a smaller 388 // limit on text length from registering the onTextChanged event. 389 if (mPreChange == null || mPreChange.equals(postChange) || 390 (mMaxLength > -1 && mPreChange.length() > mMaxLength && 391 mPreChange.substring(0, mMaxLength).equals(postChange))) { 392 return; 393 } 394 mPreChange = postChange; 395 // This was simply a delete or a cut, so just delete the selection. 396 if (before > 0 && 0 == count) { 397 mWebView.deleteSelection(start, start + before); 398 // For this and all changes to the text, update our cache 399 updateCachedTextfield(); 400 return; 401 } 402 // Find the last character being replaced. If it can be represented by 403 // events, we will pass them to native (after replacing the beginning 404 // of the changed text), so we can see javascript events. 405 // Otherwise, replace the text being changed (including the last 406 // character) in the textfield. 407 TextUtils.getChars(s, start + count - 1, start + count, mCharacter, 0); 408 KeyCharacterMap kmap = 409 KeyCharacterMap.load(KeyCharacterMap.BUILT_IN_KEYBOARD); 410 KeyEvent[] events = kmap.getEvents(mCharacter); 411 boolean cannotUseKeyEvents = null == events; 412 int charactersFromKeyEvents = cannotUseKeyEvents ? 0 : 1; 413 if (count > 1 || cannotUseKeyEvents) { 414 String replace = s.subSequence(start, 415 start + count - charactersFromKeyEvents).toString(); 416 mWebView.replaceTextfieldText(start, start + before, replace, 417 start + count - charactersFromKeyEvents, 418 start + count - charactersFromKeyEvents); 419 } else { 420 // This corrects the selection which may have been affected by the 421 // trackball or auto-correct. 422 if (DebugFlags.WEB_TEXT_VIEW) { 423 Log.v(LOGTAG, "onTextChanged start=" + start 424 + " start + before=" + (start + before)); 425 } 426 if (!mInSetTextAndKeepSelection) { 427 mWebView.setSelection(start, start + before); 428 } 429 } 430 if (!cannotUseKeyEvents) { 431 int length = events.length; 432 for (int i = 0; i < length; i++) { 433 // We never send modifier keys to native code so don't send them 434 // here either. 435 if (!KeyEvent.isModifierKey(events[i].getKeyCode())) { 436 sendDomEvent(events[i]); 437 } 438 } 439 } 440 updateCachedTextfield(); 441 } 442 443 @Override 444 public boolean onTouchEvent(MotionEvent event) { 445 switch (event.getAction()) { 446 case MotionEvent.ACTION_DOWN: 447 super.onTouchEvent(event); 448 // This event may be the start of a drag, so store it to pass to the 449 // WebView if it is. 450 mDragStartX = event.getX(); 451 mDragStartY = event.getY(); 452 mDragStartTime = event.getEventTime(); 453 mDragSent = false; 454 mScrolled = false; 455 mGotTouchDown = true; 456 break; 457 case MotionEvent.ACTION_MOVE: 458 int slop = ViewConfiguration.get(mContext).getScaledTouchSlop(); 459 Spannable buffer = getText(); 460 int initialScrollX = Touch.getInitialScrollX(this, buffer); 461 int initialScrollY = Touch.getInitialScrollY(this, buffer); 462 super.onTouchEvent(event); 463 int dx = Math.abs(mScrollX - initialScrollX); 464 int dy = Math.abs(mScrollY - initialScrollY); 465 // Use a smaller slop when checking to see if we've moved far enough 466 // to scroll the text, because experimentally, slop has shown to be 467 // to big for the case of a small textfield. 468 int smallerSlop = slop/2; 469 if (dx > smallerSlop || dy > smallerSlop) { 470 if (mWebView != null) { 471 float maxScrollX = (float) Touch.getMaxScrollX(this, 472 getLayout(), mScrollY); 473 if (DebugFlags.WEB_TEXT_VIEW) { 474 Log.v(LOGTAG, "onTouchEvent x=" + mScrollX + " y=" 475 + mScrollY + " maxX=" + maxScrollX); 476 } 477 mWebView.scrollFocusedTextInput(maxScrollX > 0 ? 478 mScrollX / maxScrollX : 0, mScrollY); 479 } 480 mScrolled = true; 481 return true; 482 } 483 if (Math.abs((int) event.getX() - mDragStartX) < slop 484 && Math.abs((int) event.getY() - mDragStartY) < slop) { 485 // If the user has not scrolled further than slop, we should not 486 // send the drag. Instead, do nothing, and when the user lifts 487 // their finger, we will change the selection. 488 return true; 489 } 490 if (mWebView != null) { 491 // Only want to set the initial state once. 492 if (!mDragSent) { 493 mWebView.initiateTextFieldDrag(mDragStartX, mDragStartY, 494 mDragStartTime); 495 mDragSent = true; 496 } 497 boolean scrolled = mWebView.textFieldDrag(event); 498 if (scrolled) { 499 mScrolled = true; 500 cancelLongPress(); 501 return true; 502 } 503 } 504 return false; 505 case MotionEvent.ACTION_UP: 506 case MotionEvent.ACTION_CANCEL: 507 if (!mScrolled) { 508 // If the page scrolled, or the TextView scrolled, we do not 509 // want to change the selection 510 cancelLongPress(); 511 if (mGotTouchDown && mWebView != null) { 512 mWebView.touchUpOnTextField(event); 513 } 514 } 515 // Necessary for the WebView to reset its state 516 if (mWebView != null && mDragSent) { 517 mWebView.onTouchEvent(event); 518 } 519 mGotTouchDown = false; 520 break; 521 default: 522 break; 523 } 524 return true; 525 } 526 527 @Override 528 public boolean onTrackballEvent(MotionEvent event) { 529 if (isPopupShowing()) { 530 return super.onTrackballEvent(event); 531 } 532 if (event.getAction() != MotionEvent.ACTION_MOVE) { 533 return false; 534 } 535 // If the Cursor is not on the text input, webview should handle the 536 // trackball 537 if (!mWebView.nativeCursorMatchesFocus()) { 538 return mWebView.onTrackballEvent(event); 539 } 540 Spannable text = (Spannable) getText(); 541 MovementMethod move = getMovementMethod(); 542 if (move != null && getLayout() != null && 543 move.onTrackballEvent(this, text, event)) { 544 // Selection is changed in onSelectionChanged 545 return true; 546 } 547 return false; 548 } 549 550 /** 551 * Remove this WebTextView from its host WebView, and return 552 * focus to the host. 553 */ 554 /* package */ void remove() { 555 // hide the soft keyboard when the edit text is out of focus 556 InputMethodManager.getInstance(mContext).hideSoftInputFromWindow( 557 getWindowToken(), 0); 558 mWebView.removeView(this); 559 mWebView.requestFocus(); 560 } 561 562 /* package */ void bringIntoView() { 563 if (getLayout() != null) { 564 bringPointIntoView(Selection.getSelectionEnd(getText())); 565 } 566 } 567 568 /** 569 * Send the DOM events for the specified event. 570 * @param event KeyEvent to be translated into a DOM event. 571 */ 572 private void sendDomEvent(KeyEvent event) { 573 mWebView.passToJavaScript(getText().toString(), event); 574 } 575 576 /** 577 * Always use this instead of setAdapter, as this has features specific to 578 * the WebTextView. 579 */ 580 public void setAdapterCustom(AutoCompleteAdapter adapter) { 581 if (adapter != null) { 582 setInputType(EditorInfo.TYPE_TEXT_FLAG_AUTO_COMPLETE); 583 adapter.setTextView(this); 584 } 585 super.setAdapter(adapter); 586 } 587 588 /** 589 * This is a special version of ArrayAdapter which changes its text size 590 * to match the text size of its host TextView. 591 */ 592 public static class AutoCompleteAdapter extends ArrayAdapter<String> { 593 private TextView mTextView; 594 595 public AutoCompleteAdapter(Context context, ArrayList<String> entries) { 596 super(context, com.android.internal.R.layout 597 .search_dropdown_item_1line, entries); 598 } 599 600 /** 601 * {@inheritDoc} 602 */ 603 public View getView(int position, View convertView, ViewGroup parent) { 604 TextView tv = 605 (TextView) super.getView(position, convertView, parent); 606 if (tv != null && mTextView != null) { 607 tv.setTextSize(mTextView.getTextSize()); 608 } 609 return tv; 610 } 611 612 /** 613 * Set the TextView so we can match its text size. 614 */ 615 private void setTextView(TextView tv) { 616 mTextView = tv; 617 } 618 } 619 620 /** 621 * Sets the selection when the user clicks on a textfield or textarea with 622 * the trackball or center key, or starts typing into it without clicking on 623 * it. 624 */ 625 /* package */ void setDefaultSelection() { 626 Spannable text = (Spannable) getText(); 627 int selection = mSingle ? text.length() : 0; 628 Selection. setSelection(text, selection, selection); 629 } 630 631 /** 632 * Determine whether to use the system-wide password disguising method, 633 * or to use none. 634 * @param inPassword True if the textfield is a password field. 635 */ 636 /* package */ void setInPassword(boolean inPassword) { 637 if (inPassword) { 638 setInputType(EditorInfo.TYPE_CLASS_TEXT | EditorInfo. 639 TYPE_TEXT_VARIATION_PASSWORD); 640 createBackground(); 641 } 642 // For password fields, draw the WebTextView. For others, just show 643 // webkit's drawing. 644 setWillNotDraw(!inPassword); 645 setBackgroundDrawable(inPassword ? mBackground : null); 646 // For non-password fields, avoid the invals from TextView's blinking 647 // cursor 648 setCursorVisible(inPassword); 649 } 650 651 /** 652 * Private class used for the background of a password textfield. 653 */ 654 private static class OutlineDrawable extends Drawable { 655 public void draw(Canvas canvas) { 656 Rect bounds = getBounds(); 657 Paint paint = new Paint(); 658 paint.setAntiAlias(true); 659 // Draw the background. 660 paint.setColor(Color.WHITE); 661 canvas.drawRect(bounds, paint); 662 // Draw the outline. 663 paint.setStyle(Paint.Style.STROKE); 664 paint.setColor(Color.BLACK); 665 canvas.drawRect(bounds, paint); 666 } 667 // Always want it to be opaque. 668 public int getOpacity() { 669 return PixelFormat.OPAQUE; 670 } 671 // These are needed because they are abstract in Drawable. 672 public void setAlpha(int alpha) { } 673 public void setColorFilter(ColorFilter cf) { } 674 } 675 676 /** 677 * Create a background for the WebTextView and set up the paint for drawing 678 * the text. This way, we can see the password transformation of the 679 * system, which (optionally) shows the actual text before changing to dots. 680 * The background is necessary to hide the webkit-drawn text beneath. 681 */ 682 private void createBackground() { 683 if (mBackground != null) { 684 return; 685 } 686 mBackground = new OutlineDrawable(); 687 688 setGravity(Gravity.CENTER_VERTICAL); 689 // Turn on subpixel text, and turn off kerning, so it better matches 690 // the text in webkit. 691 TextPaint paint = getPaint(); 692 int flags = paint.getFlags() | Paint.SUBPIXEL_TEXT_FLAG | 693 Paint.ANTI_ALIAS_FLAG & ~Paint.DEV_KERN_TEXT_FLAG; 694 paint.setFlags(flags); 695 // Set the text color to black, regardless of the theme. This ensures 696 // that other applications that use embedded WebViews will properly 697 // display the text in password textfields. 698 setTextColor(Color.BLACK); 699 } 700 701 @Override 702 public void setInputType(int type) { 703 mFromSetInputType = true; 704 super.setInputType(type); 705 mFromSetInputType = false; 706 } 707 708 /* package */ void setMaxLength(int maxLength) { 709 mMaxLength = maxLength; 710 if (-1 == maxLength) { 711 setFilters(NO_FILTERS); 712 } else { 713 setFilters(new InputFilter[] { 714 new InputFilter.LengthFilter(maxLength) }); 715 } 716 } 717 718 /** 719 * Set the pointer for this node so it can be determined which node this 720 * WebTextView represents. 721 * @param ptr Integer representing the pointer to the node which this 722 * WebTextView represents. 723 */ 724 /* package */ void setNodePointer(int ptr) { 725 mNodePointer = ptr; 726 } 727 728 /** 729 * Determine the position and size of WebTextView, and add it to the 730 * WebView's view heirarchy. All parameters are presumed to be in 731 * view coordinates. Also requests Focus and sets the cursor to not 732 * request to be in view. 733 * @param x x-position of the textfield. 734 * @param y y-position of the textfield. 735 * @param width width of the textfield. 736 * @param height height of the textfield. 737 */ 738 /* package */ void setRect(int x, int y, int width, int height) { 739 LayoutParams lp = (LayoutParams) getLayoutParams(); 740 if (null == lp) { 741 lp = new LayoutParams(width, height, x, y); 742 } else { 743 lp.x = x; 744 lp.y = y; 745 lp.width = width; 746 lp.height = height; 747 } 748 if (getParent() == null) { 749 mWebView.addView(this, lp); 750 } else { 751 setLayoutParams(lp); 752 } 753 // Set up a measure spec so a layout can always be recreated. 754 mWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY); 755 mHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY); 756 requestFocus(); 757 } 758 759 /** 760 * Set the selection, and disable our onSelectionChanged action. 761 */ 762 /* package */ void setSelectionFromWebKit(int start, int end) { 763 if (start < 0 || end < 0) return; 764 Spannable text = (Spannable) getText(); 765 int length = text.length(); 766 if (start > length || end > length) return; 767 mFromWebKit = true; 768 Selection.setSelection(text, start, end); 769 mFromWebKit = false; 770 } 771 772 /** 773 * Set whether this is a single-line textfield or a multi-line textarea. 774 * Textfields scroll horizontally, and do not handle the enter key. 775 * Textareas behave oppositely. 776 * Do NOT call this after calling setInPassword(true). This will result in 777 * removing the password input type. 778 */ 779 public void setSingleLine(boolean single) { 780 int inputType = EditorInfo.TYPE_CLASS_TEXT 781 | EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT; 782 if (single) { 783 int action = mWebView.nativeTextFieldAction(); 784 switch (action) { 785 // Keep in sync with CachedRoot::ImeAction 786 case 0: // NEXT 787 setImeOptions(EditorInfo.IME_ACTION_NEXT); 788 break; 789 case 1: // GO 790 setImeOptions(EditorInfo.IME_ACTION_GO); 791 break; 792 case -1: // FAILURE 793 case 2: // DONE 794 setImeOptions(EditorInfo.IME_ACTION_DONE); 795 break; 796 } 797 } else { 798 inputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE 799 | EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES 800 | EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT; 801 setImeOptions(EditorInfo.IME_ACTION_NONE); 802 } 803 mSingle = single; 804 setHorizontallyScrolling(single); 805 setInputType(inputType); 806 } 807 808 /** 809 * Set the text to the new string, but use the old selection, making sure 810 * to keep it within the new string. 811 * @param text The new text to place in the textfield. 812 */ 813 /* package */ void setTextAndKeepSelection(String text) { 814 mPreChange = text.toString(); 815 Editable edit = (Editable) getText(); 816 mInSetTextAndKeepSelection = true; 817 edit.replace(0, edit.length(), text); 818 mInSetTextAndKeepSelection = false; 819 updateCachedTextfield(); 820 } 821 822 /** 823 * Update the cache to reflect the current text. 824 */ 825 /* package */ void updateCachedTextfield() { 826 mWebView.updateCachedTextfield(getText().toString()); 827 } 828 829 @Override 830 public boolean requestRectangleOnScreen(Rect rectangle) { 831 // don't scroll while in zoom animation. When it is done, we will adjust 832 // the WebTextView if it is in editing mode. 833 if (!mWebView.inAnimateZoom()) { 834 return super.requestRectangleOnScreen(rectangle); 835 } 836 return false; 837 } 838} 839