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 17 package android.webkit; 18 19 import com.android.internal.widget.EditableInputConnection; 20 21 import android.content.Context; 22 import android.graphics.Canvas; 23 import android.graphics.Color; 24 import android.graphics.ColorFilter; 25 import android.graphics.Paint; 26 import android.graphics.PixelFormat; 27 import android.graphics.Rect; 28 import android.graphics.drawable.Drawable; 29 import android.text.Editable; 30 import android.text.InputFilter; 31 import android.text.Layout; 32 import android.text.Selection; 33 import android.text.Spannable; 34 import android.text.TextPaint; 35 import android.text.TextUtils; 36 import android.text.method.MovementMethod; 37 import android.text.method.Touch; 38 import android.util.Log; 39 import android.view.Gravity; 40 import android.view.KeyCharacterMap; 41 import android.view.KeyEvent; 42 import android.view.MotionEvent; 43 import android.view.View; 44 import android.view.ViewConfiguration; 45 import android.view.ViewGroup; 46 import android.view.inputmethod.EditorInfo; 47 import android.view.inputmethod.InputMethodManager; 48 import android.view.inputmethod.InputConnection; 49 import android.widget.AbsoluteLayout.LayoutParams; 50 import android.widget.ArrayAdapter; 51 import android.widget.AutoCompleteTextView; 52 import android.widget.TextView; 53 54 import 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 public void onDrawSubstitute() { 338 updateCursorControllerPositions(); 339 } 340 341 @Override 342 public void onEditorAction(int actionCode) { 343 switch (actionCode) { 344 case EditorInfo.IME_ACTION_NEXT: 345 if (mWebView.nativeMoveCursorToNextTextInput()) { 346 // Since the cursor will no longer be in the same place as the 347 // focus, set the focus controller back to inactive 348 mWebView.setFocusControllerInactive(); 349 // Preemptively rebuild the WebTextView, so that the action will 350 // be set properly. 351 mWebView.rebuildWebTextView(); 352 setDefaultSelection(); 353 mWebView.invalidate(); 354 } 355 break; 356 case EditorInfo.IME_ACTION_DONE: 357 super.onEditorAction(actionCode); 358 break; 359 case EditorInfo.IME_ACTION_GO: 360 case EditorInfo.IME_ACTION_SEARCH: 361 // Send an enter and hide the soft keyboard 362 InputMethodManager.getInstance(mContext) 363 .hideSoftInputFromWindow(getWindowToken(), 0); 364 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 365 KeyEvent.KEYCODE_ENTER)); 366 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 367 KeyEvent.KEYCODE_ENTER)); 368 369 default: 370 break; 371 } 372 } 373 374 @Override 375 protected void onFocusChanged(boolean focused, int direction, 376 Rect previouslyFocusedRect) { 377 mFromFocusChange = true; 378 super.onFocusChanged(focused, direction, previouslyFocusedRect); 379 mFromFocusChange = false; 380 } 381 382 @Override 383 protected void onScrollChanged(int l, int t, int oldl, int oldt) { 384 super.onScrollChanged(l, t, oldl, oldt); 385 lineUpScroll(); 386 } 387 388 @Override 389 protected void onSelectionChanged(int selStart, int selEnd) { 390 if (mInSetTextAndKeepSelection) return; 391 // This code is copied from TextView.onDraw(). That code does not get 392 // executed, however, because the WebTextView does not draw, allowing 393 // webkit's drawing to show through. 394 InputMethodManager imm = InputMethodManager.peekInstance(); 395 if (imm != null && imm.isActive(this)) { 396 Spannable sp = (Spannable) getText(); 397 int candStart = EditableInputConnection.getComposingSpanStart(sp); 398 int candEnd = EditableInputConnection.getComposingSpanEnd(sp); 399 imm.updateSelection(this, selStart, selEnd, candStart, candEnd); 400 } 401 if (!mFromWebKit && !mFromFocusChange && !mFromSetInputType 402 && mWebView != null) { 403 if (DebugFlags.WEB_TEXT_VIEW) { 404 Log.v(LOGTAG, "onSelectionChanged selStart=" + selStart 405 + " selEnd=" + selEnd); 406 } 407 mWebView.setSelection(selStart, selEnd); 408 lineUpScroll(); 409 } 410 } 411 412 @Override 413 protected void onTextChanged(CharSequence s,int start,int before,int count){ 414 super.onTextChanged(s, start, before, count); 415 String postChange = s.toString(); 416 // Prevent calls to setText from invoking onTextChanged (since this will 417 // mean we are on a different textfield). Also prevent the change when 418 // going from a textfield with a string of text to one with a smaller 419 // limit on text length from registering the onTextChanged event. 420 if (mPreChange == null || mPreChange.equals(postChange) || 421 (mMaxLength > -1 && mPreChange.length() > mMaxLength && 422 mPreChange.substring(0, mMaxLength).equals(postChange))) { 423 return; 424 } 425 mPreChange = postChange; 426 if (0 == count) { 427 if (before > 0) { 428 // This was simply a delete or a cut, so just delete the 429 // selection. 430 mWebView.deleteSelection(start, start + before); 431 // For this and all changes to the text, update our cache 432 updateCachedTextfield(); 433 } 434 // before should never be negative, so whether it was a cut 435 // (handled above), or before is 0, in which case nothing has 436 // changed, we should return. 437 return; 438 } 439 // Find the last character being replaced. If it can be represented by 440 // events, we will pass them to native (after replacing the beginning 441 // of the changed text), so we can see javascript events. 442 // Otherwise, replace the text being changed (including the last 443 // character) in the textfield. 444 TextUtils.getChars(s, start + count - 1, start + count, mCharacter, 0); 445 KeyCharacterMap kmap = 446 KeyCharacterMap.load(KeyCharacterMap.BUILT_IN_KEYBOARD); 447 KeyEvent[] events = kmap.getEvents(mCharacter); 448 boolean cannotUseKeyEvents = null == events; 449 int charactersFromKeyEvents = cannotUseKeyEvents ? 0 : 1; 450 if (count > 1 || cannotUseKeyEvents) { 451 String replace = s.subSequence(start, 452 start + count - charactersFromKeyEvents).toString(); 453 mWebView.replaceTextfieldText(start, start + before, replace, 454 start + count - charactersFromKeyEvents, 455 start + count - charactersFromKeyEvents); 456 } else { 457 // This corrects the selection which may have been affected by the 458 // trackball or auto-correct. 459 if (DebugFlags.WEB_TEXT_VIEW) { 460 Log.v(LOGTAG, "onTextChanged start=" + start 461 + " start + before=" + (start + before)); 462 } 463 if (!mInSetTextAndKeepSelection) { 464 mWebView.setSelection(start, start + before); 465 } 466 } 467 if (!cannotUseKeyEvents) { 468 int length = events.length; 469 for (int i = 0; i < length; i++) { 470 // We never send modifier keys to native code so don't send them 471 // here either. 472 if (!KeyEvent.isModifierKey(events[i].getKeyCode())) { 473 sendDomEvent(events[i]); 474 } 475 } 476 } 477 updateCachedTextfield(); 478 } 479 480 @Override 481 public boolean onTouchEvent(MotionEvent event) { 482 switch (event.getAction()) { 483 case MotionEvent.ACTION_DOWN: 484 super.onTouchEvent(event); 485 // This event may be the start of a drag, so store it to pass to the 486 // WebView if it is. 487 mDragStartX = event.getX(); 488 mDragStartY = event.getY(); 489 mDragStartTime = event.getEventTime(); 490 mDragSent = false; 491 mScrolled = false; 492 mGotTouchDown = true; 493 mHasPerformedLongClick = false; 494 break; 495 case MotionEvent.ACTION_MOVE: 496 if (mHasPerformedLongClick) { 497 mGotTouchDown = false; 498 return false; 499 } 500 int slop = ViewConfiguration.get(mContext).getScaledTouchSlop(); 501 Spannable buffer = getText(); 502 int initialScrollX = Touch.getInitialScrollX(this, buffer); 503 int initialScrollY = Touch.getInitialScrollY(this, buffer); 504 super.onTouchEvent(event); 505 int dx = Math.abs(mScrollX - initialScrollX); 506 int dy = Math.abs(mScrollY - initialScrollY); 507 // Use a smaller slop when checking to see if we've moved far enough 508 // to scroll the text, because experimentally, slop has shown to be 509 // to big for the case of a small textfield. 510 int smallerSlop = slop/2; 511 if (dx > smallerSlop || dy > smallerSlop) { 512 // Scrolling is handled in onScrollChanged. 513 mScrolled = true; 514 cancelLongPress(); 515 return true; 516 } 517 if (Math.abs((int) event.getX() - mDragStartX) < slop 518 && Math.abs((int) event.getY() - mDragStartY) < slop) { 519 // If the user has not scrolled further than slop, we should not 520 // send the drag. Instead, do nothing, and when the user lifts 521 // their finger, we will change the selection. 522 return true; 523 } 524 if (mWebView != null) { 525 // Only want to set the initial state once. 526 if (!mDragSent) { 527 mWebView.initiateTextFieldDrag(mDragStartX, mDragStartY, 528 mDragStartTime); 529 mDragSent = true; 530 } 531 boolean scrolled = mWebView.textFieldDrag(event); 532 if (scrolled) { 533 mScrolled = true; 534 cancelLongPress(); 535 return true; 536 } 537 } 538 return false; 539 case MotionEvent.ACTION_UP: 540 case MotionEvent.ACTION_CANCEL: 541 super.onTouchEvent(event); 542 if (mHasPerformedLongClick) { 543 mGotTouchDown = false; 544 return false; 545 } 546 if (!mScrolled) { 547 // If the page scrolled, or the TextView scrolled, we do not 548 // want to change the selection 549 cancelLongPress(); 550 if (mGotTouchDown && mWebView != null) { 551 mWebView.touchUpOnTextField(event); 552 } 553 } 554 // Necessary for the WebView to reset its state 555 if (mWebView != null && mDragSent) { 556 mWebView.onTouchEvent(event); 557 } 558 mGotTouchDown = false; 559 break; 560 default: 561 break; 562 } 563 return true; 564 } 565 566 @Override 567 public boolean onTrackballEvent(MotionEvent event) { 568 if (isPopupShowing()) { 569 return super.onTrackballEvent(event); 570 } 571 if (event.getAction() != MotionEvent.ACTION_MOVE) { 572 return false; 573 } 574 // If the Cursor is not on the text input, webview should handle the 575 // trackball 576 if (!mWebView.nativeCursorMatchesFocus()) { 577 return mWebView.onTrackballEvent(event); 578 } 579 Spannable text = (Spannable) getText(); 580 MovementMethod move = getMovementMethod(); 581 if (move != null && getLayout() != null && 582 move.onTrackballEvent(this, text, event)) { 583 // Selection is changed in onSelectionChanged 584 return true; 585 } 586 return false; 587 } 588 589 @Override 590 public boolean performLongClick() { 591 mHasPerformedLongClick = true; 592 return super.performLongClick(); 593 } 594 595 /** 596 * Remove this WebTextView from its host WebView, and return 597 * focus to the host. 598 */ 599 /* package */ void remove() { 600 // hide the soft keyboard when the edit text is out of focus 601 InputMethodManager.getInstance(mContext).hideSoftInputFromWindow( 602 getWindowToken(), 0); 603 mWebView.removeView(this); 604 mWebView.requestFocus(); 605 } 606 607 /* package */ void bringIntoView() { 608 if (getLayout() != null) { 609 bringPointIntoView(Selection.getSelectionEnd(getText())); 610 } 611 } 612 613 /** 614 * Send the DOM events for the specified event. 615 * @param event KeyEvent to be translated into a DOM event. 616 */ 617 private void sendDomEvent(KeyEvent event) { 618 mWebView.passToJavaScript(getText().toString(), event); 619 } 620 621 /** 622 * Always use this instead of setAdapter, as this has features specific to 623 * the WebTextView. 624 */ 625 public void setAdapterCustom(AutoCompleteAdapter adapter) { 626 if (adapter != null) { 627 setInputType(getInputType() 628 | EditorInfo.TYPE_TEXT_FLAG_AUTO_COMPLETE); 629 adapter.setTextView(this); 630 } 631 super.setAdapter(adapter); 632 } 633 634 /** 635 * This is a special version of ArrayAdapter which changes its text size 636 * to match the text size of its host TextView. 637 */ 638 public static class AutoCompleteAdapter extends ArrayAdapter<String> { 639 private TextView mTextView; 640 641 public AutoCompleteAdapter(Context context, ArrayList<String> entries) { 642 super(context, com.android.internal.R.layout 643 .search_dropdown_item_1line, entries); 644 } 645 646 /** 647 * {@inheritDoc} 648 */ 649 public View getView(int position, View convertView, ViewGroup parent) { 650 TextView tv = 651 (TextView) super.getView(position, convertView, parent); 652 if (tv != null && mTextView != null) { 653 tv.setTextSize(mTextView.getTextSize()); 654 } 655 return tv; 656 } 657 658 /** 659 * Set the TextView so we can match its text size. 660 */ 661 private void setTextView(TextView tv) { 662 mTextView = tv; 663 } 664 } 665 666 /** 667 * Sets the selection when the user clicks on a textfield or textarea with 668 * the trackball or center key, or starts typing into it without clicking on 669 * it. 670 */ 671 /* package */ void setDefaultSelection() { 672 Spannable text = (Spannable) getText(); 673 int selection = mSingle ? text.length() : 0; 674 if (Selection.getSelectionStart(text) == selection 675 && Selection.getSelectionEnd(text) == selection) { 676 // The selection of the UI copy is set correctly, but the 677 // WebTextView still needs to inform the webkit thread to set the 678 // selection. Normally that is done in onSelectionChanged, but 679 // onSelectionChanged will not be called because the UI copy is not 680 // changing. (This can happen when the WebTextView takes focus. 681 // That onSelectionChanged was blocked because the selection set 682 // when focusing is not necessarily the desirable selection for 683 // WebTextView.) 684 if (mWebView != null) { 685 mWebView.setSelection(selection, selection); 686 } 687 } else { 688 Selection.setSelection(text, selection, selection); 689 } 690 } 691 692 /** 693 * Determine whether to use the system-wide password disguising method, 694 * or to use none. 695 * @param inPassword True if the textfield is a password field. 696 */ 697 /* package */ void setInPassword(boolean inPassword) { 698 if (inPassword) { 699 setInputType(EditorInfo.TYPE_CLASS_TEXT | EditorInfo. 700 TYPE_TEXT_VARIATION_PASSWORD); 701 createBackground(); 702 } 703 // For password fields, draw the WebTextView. For others, just show 704 // webkit's drawing. 705 setWillNotDraw(!inPassword); 706 setBackgroundDrawable(inPassword ? mBackground : null); 707 } 708 709 /** 710 * Private class used for the background of a password textfield. 711 */ 712 private static class OutlineDrawable extends Drawable { 713 public void draw(Canvas canvas) { 714 Rect bounds = getBounds(); 715 Paint paint = new Paint(); 716 paint.setAntiAlias(true); 717 // Draw the background. 718 paint.setColor(Color.WHITE); 719 canvas.drawRect(bounds, paint); 720 // Draw the outline. 721 paint.setStyle(Paint.Style.STROKE); 722 paint.setColor(Color.BLACK); 723 canvas.drawRect(bounds, paint); 724 } 725 // Always want it to be opaque. 726 public int getOpacity() { 727 return PixelFormat.OPAQUE; 728 } 729 // These are needed because they are abstract in Drawable. 730 public void setAlpha(int alpha) { } 731 public void setColorFilter(ColorFilter cf) { } 732 } 733 734 /** 735 * Create a background for the WebTextView and set up the paint for drawing 736 * the text. This way, we can see the password transformation of the 737 * system, which (optionally) shows the actual text before changing to dots. 738 * The background is necessary to hide the webkit-drawn text beneath. 739 */ 740 private void createBackground() { 741 if (mBackground != null) { 742 return; 743 } 744 mBackground = new OutlineDrawable(); 745 746 setGravity(Gravity.CENTER_VERTICAL); 747 // Turn on subpixel text, and turn off kerning, so it better matches 748 // the text in webkit. 749 TextPaint paint = getPaint(); 750 int flags = paint.getFlags() | Paint.SUBPIXEL_TEXT_FLAG | 751 Paint.ANTI_ALIAS_FLAG & ~Paint.DEV_KERN_TEXT_FLAG; 752 paint.setFlags(flags); 753 // Set the text color to black, regardless of the theme. This ensures 754 // that other applications that use embedded WebViews will properly 755 // display the text in password textfields. 756 setTextColor(Color.BLACK); 757 } 758 759 @Override 760 public void setInputType(int type) { 761 mFromSetInputType = true; 762 super.setInputType(type); 763 mFromSetInputType = false; 764 } 765 766 private void setMaxLength(int maxLength) { 767 mMaxLength = maxLength; 768 if (-1 == maxLength) { 769 setFilters(NO_FILTERS); 770 } else { 771 setFilters(new InputFilter[] { 772 new InputFilter.LengthFilter(maxLength) }); 773 } 774 } 775 776 /** 777 * Set the pointer for this node so it can be determined which node this 778 * WebTextView represents. 779 * @param ptr Integer representing the pointer to the node which this 780 * WebTextView represents. 781 */ 782 /* package */ void setNodePointer(int ptr) { 783 mNodePointer = ptr; 784 } 785 786 /** 787 * Determine the position and size of WebTextView, and add it to the 788 * WebView's view heirarchy. All parameters are presumed to be in 789 * view coordinates. Also requests Focus and sets the cursor to not 790 * request to be in view. 791 * @param x x-position of the textfield. 792 * @param y y-position of the textfield. 793 * @param width width of the textfield. 794 * @param height height of the textfield. 795 */ 796 /* package */ void setRect(int x, int y, int width, int height) { 797 LayoutParams lp = (LayoutParams) getLayoutParams(); 798 if (null == lp) { 799 lp = new LayoutParams(width, height, x, y); 800 } else { 801 lp.x = x; 802 lp.y = y; 803 lp.width = width; 804 lp.height = height; 805 } 806 if (getParent() == null) { 807 mWebView.addView(this, lp); 808 } else { 809 setLayoutParams(lp); 810 } 811 // Set up a measure spec so a layout can always be recreated. 812 mWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY); 813 mHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY); 814 } 815 816 /** 817 * Set the selection, and disable our onSelectionChanged action. 818 */ 819 /* package */ void setSelectionFromWebKit(int start, int end) { 820 if (start < 0 || end < 0) return; 821 Spannable text = (Spannable) getText(); 822 int length = text.length(); 823 if (start > length || end > length) return; 824 mFromWebKit = true; 825 Selection.setSelection(text, start, end); 826 mFromWebKit = false; 827 } 828 829 /** 830 * Set the text to the new string, but use the old selection, making sure 831 * to keep it within the new string. 832 * @param text The new text to place in the textfield. 833 */ 834 /* package */ void setTextAndKeepSelection(String text) { 835 mPreChange = text.toString(); 836 Editable edit = (Editable) getText(); 837 int selStart = Selection.getSelectionStart(edit); 838 int selEnd = Selection.getSelectionEnd(edit); 839 mInSetTextAndKeepSelection = true; 840 edit.replace(0, edit.length(), text); 841 int newLength = edit.length(); 842 if (selStart > newLength) selStart = newLength; 843 if (selEnd > newLength) selEnd = newLength; 844 Selection.setSelection(edit, selStart, selEnd); 845 mInSetTextAndKeepSelection = false; 846 updateCachedTextfield(); 847 } 848 849 /** 850 * Called by WebView.rebuildWebTextView(). Based on the type of the <input> 851 * element, set up the WebTextView, its InputType, and IME Options properly. 852 * @param type int corresponding to enum "type" defined in WebView.cpp. 853 * Does not correspond to HTMLInputElement::InputType so this 854 * is unaffected if that changes, and also because that has no 855 * type corresponding to textarea (which is its own tag). 856 */ 857 /* package */ void setType(int type) { 858 if (mWebView == null) return; 859 boolean single = true; 860 boolean inPassword = false; 861 int maxLength = -1; 862 int inputType = EditorInfo.TYPE_CLASS_TEXT; 863 if (mWebView.nativeFocusCandidateHasNextTextfield()) { 864 inputType |= EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT; 865 } 866 int imeOptions = EditorInfo.IME_FLAG_NO_EXTRACT_UI 867 | EditorInfo.IME_FLAG_NO_FULLSCREEN; 868 switch (type) { 869 case 0: // NORMAL_TEXT_FIELD 870 imeOptions |= EditorInfo.IME_ACTION_GO; 871 break; 872 case 1: // TEXT_AREA 873 single = false; 874 inputType = EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE 875 | EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES 876 | EditorInfo.TYPE_CLASS_TEXT 877 | EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT; 878 imeOptions |= EditorInfo.IME_ACTION_NONE; 879 break; 880 case 2: // PASSWORD 881 inPassword = true; 882 imeOptions |= EditorInfo.IME_ACTION_GO; 883 break; 884 case 3: // SEARCH 885 imeOptions |= EditorInfo.IME_ACTION_SEARCH; 886 break; 887 case 4: // EMAIL 888 // TYPE_TEXT_VARIATION_WEB_EDIT_TEXT prevents EMAIL_ADDRESS 889 // from working, so exclude it for now. 890 imeOptions |= EditorInfo.IME_ACTION_GO; 891 break; 892 case 5: // NUMBER 893 inputType |= EditorInfo.TYPE_CLASS_NUMBER; 894 // Number and telephone do not have both a Tab key and an 895 // action, so set the action to NEXT 896 imeOptions |= EditorInfo.IME_ACTION_NEXT; 897 break; 898 case 6: // TELEPHONE 899 inputType |= EditorInfo.TYPE_CLASS_PHONE; 900 imeOptions |= EditorInfo.IME_ACTION_NEXT; 901 break; 902 case 7: // URL 903 // TYPE_TEXT_VARIATION_URI prevents Tab key from showing, so 904 // exclude it for now. 905 imeOptions |= EditorInfo.IME_ACTION_GO; 906 break; 907 default: 908 imeOptions |= EditorInfo.IME_ACTION_GO; 909 break; 910 } 911 setHint(null); 912 if (single) { 913 mWebView.requestLabel(mWebView.nativeFocusCandidateFramePointer(), 914 mNodePointer); 915 maxLength = mWebView.nativeFocusCandidateMaxLength(); 916 if (type != 2 /* PASSWORD */) { 917 String name = mWebView.nativeFocusCandidateName(); 918 if (name != null && name.length() > 0) { 919 mWebView.requestFormData(name, mNodePointer); 920 } 921 } 922 } 923 mSingle = single; 924 setMaxLength(maxLength); 925 setHorizontallyScrolling(single); 926 setInputType(inputType); 927 setImeOptions(imeOptions); 928 setInPassword(inPassword); 929 AutoCompleteAdapter adapter = null; 930 setAdapterCustom(adapter); 931 } 932 933 /** 934 * Update the cache to reflect the current text. 935 */ 936 /* package */ void updateCachedTextfield() { 937 mWebView.updateCachedTextfield(getText().toString()); 938 } 939 940 @Override 941 public boolean requestRectangleOnScreen(Rect rectangle) { 942 // don't scroll while in zoom animation. When it is done, we will adjust 943 // the WebTextView if it is in editing mode. 944 if (!mWebView.inAnimateZoom()) { 945 return super.requestRectangleOnScreen(rectangle); 946 } 947 return false; 948 } 949 } 950