WebTextView.java revision 2c0a80931538a9959007fb6a7c44d8d23731f6b2
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.os.Bundle; 30import android.os.Handler; 31import android.os.Message; 32import android.os.ResultReceiver; 33import android.text.BoringLayout.Metrics; 34import android.text.DynamicLayout; 35import android.text.Editable; 36import android.text.InputFilter; 37import android.text.Layout; 38import android.text.Selection; 39import android.text.Spannable; 40import android.text.TextPaint; 41import android.text.TextUtils; 42import android.text.method.MovementMethod; 43import android.text.method.Touch; 44import android.util.Log; 45import android.util.TypedValue; 46import android.view.Gravity; 47import android.view.KeyCharacterMap; 48import android.view.KeyEvent; 49import android.view.MotionEvent; 50import android.view.View; 51import android.view.ViewConfiguration; 52import android.view.ViewGroup; 53import android.view.inputmethod.EditorInfo; 54import android.view.inputmethod.InputConnection; 55import android.view.inputmethod.InputMethodManager; 56import android.widget.AbsoluteLayout.LayoutParams; 57import android.widget.AdapterView; 58import android.widget.ArrayAdapter; 59import android.widget.AutoCompleteTextView; 60import android.widget.TextView; 61 62import java.util.ArrayList; 63 64import junit.framework.Assert; 65 66/** 67 * WebTextView is a specialized version of EditText used by WebView 68 * to overlay html textfields (and textareas) to use our standard 69 * text editing. 70 */ 71/* package */ class WebTextView extends AutoCompleteTextView 72 implements AdapterView.OnItemClickListener { 73 74 static final String LOGTAG = "webtextview"; 75 76 private WebView mWebView; 77 private boolean mSingle; 78 private int mWidthSpec; 79 private int mHeightSpec; 80 private int mNodePointer; 81 // FIXME: This is a hack for blocking unmatched key ups, in particular 82 // on the enter key. The method for blocking unmatched key ups prevents 83 // the shift key from working properly. 84 private boolean mGotEnterDown; 85 private int mMaxLength; 86 // Keep track of the text before the change so we know whether we actually 87 // need to send down the DOM events. 88 private String mPreChange; 89 private Drawable mBackground; 90 // Variables for keeping track of the touch down, to send to the WebView 91 // when a drag starts 92 private float mDragStartX; 93 private float mDragStartY; 94 private long mDragStartTime; 95 private boolean mDragSent; 96 // True if the most recent drag event has caused either the TextView to 97 // scroll or the web page to scroll. Gets reset after a touch down. 98 private boolean mScrolled; 99 // Whether or not a selection change was generated from webkit. If it was, 100 // we do not need to pass the selection back to webkit. 101 private boolean mFromWebKit; 102 // Whether or not a selection change was generated from the WebTextView 103 // gaining focus. If it is, we do not want to pass it to webkit. This 104 // selection comes from the MovementMethod, but we behave differently. If 105 // WebTextView gained focus from a touch, webkit will determine the 106 // selection. 107 private boolean mFromFocusChange; 108 // Whether or not a selection change was generated from setInputType. We 109 // do not want to pass this change to webkit. 110 private boolean mFromSetInputType; 111 private boolean mGotTouchDown; 112 // Keep track of whether a long press has happened. Only meaningful after 113 // an ACTION_DOWN MotionEvent 114 private boolean mHasPerformedLongClick; 115 private boolean mInSetTextAndKeepSelection; 116 // Array to store the final character added in onTextChanged, so that its 117 // KeyEvents may be determined. 118 private char[] mCharacter = new char[1]; 119 // This is used to reset the length filter when on a textfield 120 // with no max length. 121 // FIXME: This can be replaced with TextView.NO_FILTERS if that 122 // is made public/protected. 123 private static final InputFilter[] NO_FILTERS = new InputFilter[0]; 124 // For keeping track of the fact that the delete key was pressed, so 125 // we can simply pass a delete key instead of calling deleteSelection. 126 private boolean mGotDelete; 127 private int mDelSelStart; 128 private int mDelSelEnd; 129 130 // Keep in sync with native constant in 131 // external/webkit/WebKit/android/WebCoreSupport/autofill/WebAutoFill.cpp 132 /* package */ static final int FORM_NOT_AUTOFILLABLE = -1; 133 134 private boolean mAutoFillable; // Is this textview part of an autofillable form? 135 private int mQueryId; 136 private boolean mAutoFillProfileIsSet; 137 // Used to determine whether onFocusChanged was called as a result of 138 // calling remove(). 139 private boolean mInsideRemove; 140 private class MyResultReceiver extends ResultReceiver { 141 @Override 142 protected void onReceiveResult(int resultCode, Bundle resultData) { 143 if (resultCode == InputMethodManager.RESULT_SHOWN 144 && mWebView != null) { 145 mWebView.revealSelection(); 146 } 147 } 148 149 /** 150 * @param handler 151 */ 152 public MyResultReceiver(Handler handler) { 153 super(handler); 154 } 155 } 156 private MyResultReceiver mReceiver; 157 158 // Types used with setType. Keep in sync with CachedInput.h 159 private static final int NORMAL_TEXT_FIELD = 0; 160 private static final int TEXT_AREA = 1; 161 private static final int PASSWORD = 2; 162 private static final int SEARCH = 3; 163 private static final int EMAIL = 4; 164 private static final int NUMBER = 5; 165 private static final int TELEPHONE = 6; 166 private static final int URL = 7; 167 168 private static final int AUTOFILL_FORM = 100; 169 private Handler mHandler; 170 171 /** 172 * Create a new WebTextView. 173 * @param context The Context for this WebTextView. 174 * @param webView The WebView that created this. 175 */ 176 /* package */ WebTextView(Context context, WebView webView, int autoFillQueryId) { 177 super(context, null, com.android.internal.R.attr.webTextViewStyle); 178 mWebView = webView; 179 mMaxLength = -1; 180 setAutoFillable(autoFillQueryId); 181 // Turn on subpixel text, and turn off kerning, so it better matches 182 // the text in webkit. 183 TextPaint paint = getPaint(); 184 int flags = paint.getFlags() & ~Paint.DEV_KERN_TEXT_FLAG 185 | Paint.SUBPIXEL_TEXT_FLAG | Paint.DITHER_FLAG; 186 paint.setFlags(flags); 187 188 // Set the text color to black, regardless of the theme. This ensures 189 // that other applications that use embedded WebViews will properly 190 // display the text in password textfields. 191 setTextColor(DebugFlags.DRAW_WEBTEXTVIEW ? Color.RED : Color.BLACK); 192 // This helps to align the text better with the text in the web page. 193 setIncludeFontPadding(false); 194 195 mHandler = new Handler() { 196 @Override 197 public void handleMessage(Message msg) { 198 switch (msg.what) { 199 case AUTOFILL_FORM: 200 mWebView.autoFillForm(mQueryId); 201 break; 202 } 203 } 204 }; 205 mReceiver = new MyResultReceiver(mHandler); 206 } 207 208 public void setAutoFillable(int queryId) { 209 mAutoFillable = mWebView.getSettings().getAutoFillEnabled() 210 && (queryId != FORM_NOT_AUTOFILLABLE); 211 mQueryId = queryId; 212 } 213 214 @Override 215 public boolean dispatchKeyEvent(KeyEvent event) { 216 if (event.isSystem()) { 217 return super.dispatchKeyEvent(event); 218 } 219 // Treat ACTION_DOWN and ACTION MULTIPLE the same 220 boolean down = event.getAction() != KeyEvent.ACTION_UP; 221 int keyCode = event.getKeyCode(); 222 223 boolean isArrowKey = false; 224 switch(keyCode) { 225 case KeyEvent.KEYCODE_DPAD_LEFT: 226 case KeyEvent.KEYCODE_DPAD_RIGHT: 227 case KeyEvent.KEYCODE_DPAD_UP: 228 case KeyEvent.KEYCODE_DPAD_DOWN: 229 isArrowKey = true; 230 break; 231 } 232 233 if (KeyEvent.KEYCODE_TAB == keyCode) { 234 if (down) { 235 onEditorAction(EditorInfo.IME_ACTION_NEXT); 236 } 237 return true; 238 } 239 Spannable text = (Spannable) getText(); 240 int oldStart = Selection.getSelectionStart(text); 241 int oldEnd = Selection.getSelectionEnd(text); 242 // Normally the delete key's dom events are sent via onTextChanged. 243 // However, if the cursor is at the beginning of the field, which 244 // includes the case where it has zero length, then the text is not 245 // changed, so send the events immediately. 246 if (KeyEvent.KEYCODE_DEL == keyCode) { 247 if (oldStart == 0 && oldEnd == 0) { 248 sendDomEvent(event); 249 return true; 250 } 251 if (down) { 252 mGotDelete = true; 253 mDelSelStart = oldStart; 254 mDelSelEnd = oldEnd; 255 } 256 } 257 258 if (mSingle && (KeyEvent.KEYCODE_ENTER == keyCode 259 || KeyEvent.KEYCODE_NUMPAD_ENTER == keyCode)) { 260 if (isPopupShowing()) { 261 return super.dispatchKeyEvent(event); 262 } 263 if (!down) { 264 // Hide the keyboard, since the user has just submitted this 265 // form. The submission happens thanks to the two calls 266 // to sendDomEvent. 267 InputMethodManager.getInstance(mContext) 268 .hideSoftInputFromWindow(getWindowToken(), 0); 269 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, keyCode)); 270 sendDomEvent(event); 271 } 272 return super.dispatchKeyEvent(event); 273 } else if (KeyEvent.KEYCODE_DPAD_CENTER == keyCode) { 274 // Note that this handles center key and trackball. 275 if (isPopupShowing()) { 276 return super.dispatchKeyEvent(event); 277 } 278 // Center key should be passed to a potential onClick 279 if (!down) { 280 mWebView.centerKeyPressOnTextField(); 281 } 282 // Pass to super to handle longpress. 283 return super.dispatchKeyEvent(event); 284 } 285 286 // Ensure there is a layout so arrow keys are handled properly. 287 if (getLayout() == null) { 288 measure(mWidthSpec, mHeightSpec); 289 } 290 291 int oldLength = text.length(); 292 boolean maxedOut = mMaxLength != -1 && oldLength == mMaxLength; 293 // If we are at max length, and there is a selection rather than a 294 // cursor, we need to store the text to compare later, since the key 295 // may have changed the string. 296 String oldText; 297 if (maxedOut && oldEnd != oldStart) { 298 oldText = text.toString(); 299 } else { 300 oldText = ""; 301 } 302 if (super.dispatchKeyEvent(event)) { 303 // If the WebTextView handled the key it was either an alphanumeric 304 // key, a delete, or a movement within the text. All of those are 305 // ok to pass to javascript. 306 307 // UNLESS there is a max length determined by the html. In that 308 // case, if the string was already at the max length, an 309 // alphanumeric key will be erased by the LengthFilter, 310 // so do not pass down to javascript, and instead 311 // return true. If it is an arrow key or a delete key, we can go 312 // ahead and pass it down. 313 if (KeyEvent.KEYCODE_ENTER == keyCode 314 || KeyEvent.KEYCODE_NUMPAD_ENTER == keyCode) { 315 // For multi-line text boxes, newlines will 316 // trigger onTextChanged for key down (which will send both 317 // key up and key down) but not key up. 318 mGotEnterDown = true; 319 } 320 if (maxedOut && !isArrowKey && keyCode != KeyEvent.KEYCODE_DEL) { 321 if (oldEnd == oldStart) { 322 // Return true so the key gets dropped. 323 return true; 324 } else if (!oldText.equals(getText().toString())) { 325 // FIXME: This makes the text work properly, but it 326 // does not pass down the key event, so it may not 327 // work for a textfield that has the type of 328 // behavior of GoogleSuggest. That said, it is 329 // unlikely that a site would combine the two in 330 // one textfield. 331 Spannable span = (Spannable) getText(); 332 int newStart = Selection.getSelectionStart(span); 333 int newEnd = Selection.getSelectionEnd(span); 334 mWebView.replaceTextfieldText(0, oldLength, span.toString(), 335 newStart, newEnd); 336 return true; 337 } 338 } 339 /* FIXME: 340 * In theory, we would like to send the events for the arrow keys. 341 * However, the TextView can arbitrarily change the selection (i.e. 342 * long press followed by using the trackball). Therefore, we keep 343 * in sync with the TextView via onSelectionChanged. If we also 344 * send the DOM event, we lose the correct selection. 345 if (isArrowKey) { 346 // Arrow key does not change the text, but we still want to send 347 // the DOM events. 348 sendDomEvent(event); 349 } 350 */ 351 return true; 352 } 353 // Ignore the key up event for newlines. This prevents 354 // multiple newlines in the native textarea. 355 if (mGotEnterDown && !down) { 356 return true; 357 } 358 // if it is a navigation key, pass it to WebView 359 if (isArrowKey) { 360 // WebView check the trackballtime in onKeyDown to avoid calling 361 // native from both trackball and key handling. As this is called 362 // from WebTextView, we always want WebView to check with native. 363 // Reset trackballtime to ensure it. 364 mWebView.resetTrackballTime(); 365 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 366 .onKeyUp(keyCode, event); 367 } 368 return false; 369 } 370 371 void ensureLayout() { 372 if (getLayout() == null) { 373 // Ensure we have a Layout 374 measure(mWidthSpec, mHeightSpec); 375 LayoutParams params = (LayoutParams) getLayoutParams(); 376 if (params != null) { 377 layout(params.x, params.y, params.x + params.width, 378 params.y + params.height); 379 } 380 } 381 } 382 383 /* package */ ResultReceiver getResultReceiver() { return mReceiver; } 384 385 /** 386 * Determine whether this WebTextView currently represents the node 387 * represented by ptr. 388 * @param ptr Pointer to a node to compare to. 389 * @return boolean Whether this WebTextView already represents the node 390 * pointed to by ptr. 391 */ 392 /* package */ boolean isSameTextField(int ptr) { 393 return ptr == mNodePointer; 394 } 395 396 /** 397 * Ensure that the underlying text field/area is lined up with the WebTextView. 398 */ 399 private void lineUpScroll() { 400 Layout layout = getLayout(); 401 if (mWebView != null && layout != null) { 402 if (mSingle) { 403 // textfields only need to be lined up horizontally. 404 float maxScrollX = layout.getLineRight(0) - getWidth(); 405 if (DebugFlags.WEB_TEXT_VIEW) { 406 Log.v(LOGTAG, "onTouchEvent x=" + mScrollX + " y=" 407 + mScrollY + " maxX=" + maxScrollX); 408 } 409 mWebView.scrollFocusedTextInputX(maxScrollX > 0 ? 410 mScrollX / maxScrollX : 0); 411 } else { 412 // textareas only need to be lined up vertically. 413 mWebView.scrollFocusedTextInputY(mScrollY); 414 } 415 } 416 } 417 418 @Override 419 protected void makeNewLayout(int w, int hintWidth, Metrics boring, 420 Metrics hintBoring, int ellipsisWidth, boolean bringIntoView) { 421 // Necessary to get a Layout to work with, and to do the other work that 422 // makeNewLayout does. 423 super.makeNewLayout(w, hintWidth, boring, hintBoring, ellipsisWidth, 424 bringIntoView); 425 426 // For fields that do not draw, create a layout which is altered so that 427 // the text lines up. 428 if (DebugFlags.DRAW_WEBTEXTVIEW || willNotDraw()) { 429 float lineHeight = -1; 430 if (mWebView != null) { 431 float height = mWebView.nativeFocusCandidateLineHeight(); 432 if (height != -1) { 433 lineHeight = height * mWebView.getScale(); 434 } 435 } 436 CharSequence text = getText(); 437 // Copy from the existing Layout. 438 mLayout = new WebTextViewLayout(text, text, getPaint(), mLayout.getWidth(), 439 mLayout.getAlignment(), mLayout.getSpacingMultiplier(), 440 mLayout.getSpacingAdd(), false, null, ellipsisWidth, 441 lineHeight); 442 } 443 lineUpScroll(); 444 } 445 446 /** 447 * Custom layout which figures out its line spacing. If -1 is passed in for 448 * the height, it will use the ascent and descent from the paint to 449 * determine the line spacing. Otherwise it will use the spacing provided. 450 */ 451 private static class WebTextViewLayout extends DynamicLayout { 452 private float mLineHeight; 453 private float mDifference; 454 public WebTextViewLayout(CharSequence base, CharSequence display, 455 TextPaint paint, 456 int width, Alignment align, 457 float spacingMult, float spacingAdd, 458 boolean includepad, 459 TextUtils.TruncateAt ellipsize, int ellipsizedWidth, 460 float lineHeight) { 461 super(base, display, paint, width, align, spacingMult, spacingAdd, 462 includepad, ellipsize, ellipsizedWidth); 463 float paintLineHeight = paint.descent() - paint.ascent(); 464 if (lineHeight == -1f) { 465 mLineHeight = paintLineHeight; 466 mDifference = 0f; 467 } else { 468 mLineHeight = lineHeight; 469 // Through trial and error, I found this calculation to improve 470 // the accuracy of line placement. 471 mDifference = (lineHeight - paintLineHeight) / 2; 472 } 473 } 474 475 @Override 476 public int getLineTop(int line) { 477 return Math.round(mLineHeight * line - mDifference); 478 } 479 } 480 481 @Override public InputConnection onCreateInputConnection( 482 EditorInfo outAttrs) { 483 InputConnection connection = super.onCreateInputConnection(outAttrs); 484 if (mWebView != null) { 485 // Use the name of the textfield + the url. Use backslash as an 486 // arbitrary separator. 487 outAttrs.fieldName = mWebView.nativeFocusCandidateName() + "\\" 488 + mWebView.getUrl(); 489 } 490 return connection; 491 } 492 493 /** 494 * In general, TextView makes a call to InputMethodManager.updateSelection 495 * in onDraw. However, in the general case of WebTextView, we do not draw. 496 * This method is called by WebView.onDraw to take care of the part that 497 * needs to be called. 498 */ 499 /* package */ void onDrawSubstitute() { 500 if (!willNotDraw()) { 501 // If the WebTextView is set to draw, such as in the case of a 502 // password, onDraw calls updateSelection(), so this code path is 503 // unnecessary. 504 return; 505 } 506 // This code is copied from TextView.onDraw(). That code does not get 507 // executed, however, because the WebTextView does not draw, allowing 508 // webkit's drawing to show through. 509 InputMethodManager imm = InputMethodManager.peekInstance(); 510 if (imm != null && imm.isActive(this)) { 511 Spannable sp = (Spannable) getText(); 512 int selStart = Selection.getSelectionStart(sp); 513 int selEnd = Selection.getSelectionEnd(sp); 514 int candStart = EditableInputConnection.getComposingSpanStart(sp); 515 int candEnd = EditableInputConnection.getComposingSpanEnd(sp); 516 imm.updateSelection(this, selStart, selEnd, candStart, candEnd); 517 } 518 } 519 520 @Override 521 protected void onDraw(Canvas canvas) { 522 // onDraw should only be called for password fields. If WebTextView is 523 // still drawing, but is no longer corresponding to a password field, 524 // remove it. 525 if (!DebugFlags.DRAW_WEBTEXTVIEW && (mWebView == null 526 || !mWebView.nativeFocusCandidateIsPassword() 527 || !isSameTextField(mWebView.nativeFocusCandidatePointer()))) { 528 // Although calling remove() would seem to make more sense here, 529 // changing it to not be a password field will make it not draw. 530 // Other code will make sure that it is removed completely, but this 531 // way the user will not see it. 532 setInPassword(false); 533 } else { 534 super.onDraw(canvas); 535 } 536 } 537 538 @Override 539 public void onEditorAction(int actionCode) { 540 switch (actionCode) { 541 case EditorInfo.IME_ACTION_NEXT: 542 if (mWebView.nativeMoveCursorToNextTextInput()) { 543 // Preemptively rebuild the WebTextView, so that the action will 544 // be set properly. 545 mWebView.rebuildWebTextView(); 546 setDefaultSelection(); 547 mWebView.invalidate(); 548 } 549 break; 550 case EditorInfo.IME_ACTION_DONE: 551 super.onEditorAction(actionCode); 552 break; 553 case EditorInfo.IME_ACTION_GO: 554 case EditorInfo.IME_ACTION_SEARCH: 555 // Send an enter and hide the soft keyboard 556 InputMethodManager.getInstance(mContext) 557 .hideSoftInputFromWindow(getWindowToken(), 0); 558 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 559 KeyEvent.KEYCODE_ENTER)); 560 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 561 KeyEvent.KEYCODE_ENTER)); 562 563 default: 564 break; 565 } 566 } 567 568 @Override 569 protected void onFocusChanged(boolean focused, int direction, 570 Rect previouslyFocusedRect) { 571 mFromFocusChange = true; 572 super.onFocusChanged(focused, direction, previouslyFocusedRect); 573 if (focused) { 574 mWebView.setActive(true); 575 } else if (!mInsideRemove) { 576 mWebView.setActive(false); 577 } 578 mFromFocusChange = false; 579 } 580 581 // AdapterView.OnItemClickListener implementation 582 583 @Override 584 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 585 if (id == 0 && position == 0) { 586 // Blank out the text box while we wait for WebCore to fill the form. 587 replaceText(""); 588 WebSettings settings = mWebView.getSettings(); 589 if (mAutoFillProfileIsSet) { 590 // Call a webview method to tell WebCore to autofill the form. 591 mWebView.autoFillForm(mQueryId); 592 } else { 593 // There is no autofill profile setup yet and the user has 594 // elected to try and set one up. Call through to the 595 // embedder to action that. 596 mWebView.getWebChromeClient().setupAutoFill( 597 mHandler.obtainMessage(AUTOFILL_FORM)); 598 } 599 } 600 } 601 602 @Override 603 protected void onScrollChanged(int l, int t, int oldl, int oldt) { 604 super.onScrollChanged(l, t, oldl, oldt); 605 lineUpScroll(); 606 } 607 608 @Override 609 protected void onSelectionChanged(int selStart, int selEnd) { 610 if (!mFromWebKit && !mFromFocusChange && !mFromSetInputType 611 && mWebView != null && !mInSetTextAndKeepSelection) { 612 if (DebugFlags.WEB_TEXT_VIEW) { 613 Log.v(LOGTAG, "onSelectionChanged selStart=" + selStart 614 + " selEnd=" + selEnd); 615 } 616 mWebView.setSelection(selStart, selEnd); 617 lineUpScroll(); 618 } 619 } 620 621 @Override 622 protected void onTextChanged(CharSequence s,int start,int before,int count){ 623 super.onTextChanged(s, start, before, count); 624 String postChange = s.toString(); 625 // Prevent calls to setText from invoking onTextChanged (since this will 626 // mean we are on a different textfield). Also prevent the change when 627 // going from a textfield with a string of text to one with a smaller 628 // limit on text length from registering the onTextChanged event. 629 if (mPreChange == null || mPreChange.equals(postChange) || 630 (mMaxLength > -1 && mPreChange.length() > mMaxLength && 631 mPreChange.substring(0, mMaxLength).equals(postChange))) { 632 return; 633 } 634 mPreChange = postChange; 635 if (0 == count) { 636 if (before > 0) { 637 // For this and all changes to the text, update our cache 638 updateCachedTextfield(); 639 if (mGotDelete) { 640 mGotDelete = false; 641 int oldEnd = start + before; 642 if (mDelSelEnd == oldEnd 643 && (mDelSelStart == start 644 || (mDelSelStart == oldEnd && before == 1))) { 645 // If the selection is set up properly before the 646 // delete, send the DOM events. 647 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 648 KeyEvent.KEYCODE_DEL)); 649 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 650 KeyEvent.KEYCODE_DEL)); 651 return; 652 } 653 } 654 // This was simply a delete or a cut, so just delete the 655 // selection. 656 mWebView.deleteSelection(start, start + before); 657 } 658 mGotDelete = false; 659 // before should never be negative, so whether it was a cut 660 // (handled above), or before is 0, in which case nothing has 661 // changed, we should return. 662 return; 663 } 664 // Ensure that this flag gets cleared, since with autocorrect on, a 665 // delete key press may have a more complex result than deleting one 666 // character or the existing selection, so it will not get cleared 667 // above. 668 mGotDelete = false; 669 // Find the last character being replaced. If it can be represented by 670 // events, we will pass them to native (after replacing the beginning 671 // of the changed text), so we can see javascript events. 672 // Otherwise, replace the text being changed (including the last 673 // character) in the textfield. 674 TextUtils.getChars(s, start + count - 1, start + count, mCharacter, 0); 675 KeyCharacterMap kmap = KeyCharacterMap.load(KeyCharacterMap.VIRTUAL_KEYBOARD); 676 KeyEvent[] events = kmap.getEvents(mCharacter); 677 boolean cannotUseKeyEvents = null == events; 678 int charactersFromKeyEvents = cannotUseKeyEvents ? 0 : 1; 679 if (count > 1 || cannotUseKeyEvents) { 680 String replace = s.subSequence(start, 681 start + count - charactersFromKeyEvents).toString(); 682 mWebView.replaceTextfieldText(start, start + before, replace, 683 start + count - charactersFromKeyEvents, 684 start + count - charactersFromKeyEvents); 685 } else { 686 // This corrects the selection which may have been affected by the 687 // trackball or auto-correct. 688 if (DebugFlags.WEB_TEXT_VIEW) { 689 Log.v(LOGTAG, "onTextChanged start=" + start 690 + " start + before=" + (start + before)); 691 } 692 if (!mInSetTextAndKeepSelection) { 693 mWebView.setSelection(start, start + before); 694 } 695 } 696 if (!cannotUseKeyEvents) { 697 int length = events.length; 698 for (int i = 0; i < length; i++) { 699 // We never send modifier keys to native code so don't send them 700 // here either. 701 if (!KeyEvent.isModifierKey(events[i].getKeyCode())) { 702 sendDomEvent(events[i]); 703 } 704 } 705 } 706 updateCachedTextfield(); 707 } 708 709 @Override 710 public boolean onTouchEvent(MotionEvent event) { 711 switch (event.getAction()) { 712 case MotionEvent.ACTION_DOWN: 713 super.onTouchEvent(event); 714 // This event may be the start of a drag, so store it to pass to the 715 // WebView if it is. 716 mDragStartX = event.getX(); 717 mDragStartY = event.getY(); 718 mDragStartTime = event.getEventTime(); 719 mDragSent = false; 720 mScrolled = false; 721 mGotTouchDown = true; 722 mHasPerformedLongClick = false; 723 break; 724 case MotionEvent.ACTION_MOVE: 725 if (mHasPerformedLongClick) { 726 mGotTouchDown = false; 727 return false; 728 } 729 int slop = ViewConfiguration.get(mContext).getScaledTouchSlop(); 730 Spannable buffer = getText(); 731 int initialScrollX = Touch.getInitialScrollX(this, buffer); 732 int initialScrollY = Touch.getInitialScrollY(this, buffer); 733 super.onTouchEvent(event); 734 int dx = Math.abs(mScrollX - initialScrollX); 735 int dy = Math.abs(mScrollY - initialScrollY); 736 // Use a smaller slop when checking to see if we've moved far enough 737 // to scroll the text, because experimentally, slop has shown to be 738 // to big for the case of a small textfield. 739 int smallerSlop = slop/2; 740 if (dx > smallerSlop || dy > smallerSlop) { 741 // Scrolling is handled in onScrollChanged. 742 mScrolled = true; 743 cancelLongPress(); 744 return true; 745 } 746 if (Math.abs((int) event.getX() - mDragStartX) < slop 747 && Math.abs((int) event.getY() - mDragStartY) < slop) { 748 // If the user has not scrolled further than slop, we should not 749 // send the drag. Instead, do nothing, and when the user lifts 750 // their finger, we will change the selection. 751 return true; 752 } 753 if (mWebView != null) { 754 // Only want to set the initial state once. 755 if (!mDragSent) { 756 mWebView.initiateTextFieldDrag(mDragStartX, mDragStartY, 757 mDragStartTime); 758 mDragSent = true; 759 } 760 boolean scrolled = mWebView.textFieldDrag(event); 761 if (scrolled) { 762 mScrolled = true; 763 cancelLongPress(); 764 return true; 765 } 766 } 767 return false; 768 case MotionEvent.ACTION_UP: 769 case MotionEvent.ACTION_CANCEL: 770 super.onTouchEvent(event); 771 if (mHasPerformedLongClick) { 772 mGotTouchDown = false; 773 return false; 774 } 775 if (!mScrolled) { 776 // If the page scrolled, or the TextView scrolled, we do not 777 // want to change the selection 778 cancelLongPress(); 779 if (mGotTouchDown && mWebView != null) { 780 mWebView.touchUpOnTextField(event); 781 } 782 } 783 // Necessary for the WebView to reset its state 784 if (mWebView != null && mDragSent) { 785 mWebView.onTouchEvent(event); 786 } 787 mGotTouchDown = false; 788 break; 789 default: 790 break; 791 } 792 return true; 793 } 794 795 @Override 796 public boolean onTrackballEvent(MotionEvent event) { 797 if (isPopupShowing()) { 798 return super.onTrackballEvent(event); 799 } 800 if (event.getAction() != MotionEvent.ACTION_MOVE) { 801 return false; 802 } 803 Spannable text = getText(); 804 MovementMethod move = getMovementMethod(); 805 if (move != null && getLayout() != null && 806 move.onTrackballEvent(this, text, event)) { 807 // Selection is changed in onSelectionChanged 808 return true; 809 } 810 return false; 811 } 812 813 @Override 814 public boolean performLongClick() { 815 mHasPerformedLongClick = true; 816 return super.performLongClick(); 817 } 818 819 /** 820 * Remove this WebTextView from its host WebView, and return 821 * focus to the host. 822 */ 823 /* package */ void remove() { 824 // hide the soft keyboard when the edit text is out of focus 825 InputMethodManager imm = InputMethodManager.getInstance(mContext); 826 if (imm.isActive(this)) { 827 imm.hideSoftInputFromWindow(getWindowToken(), 0); 828 } 829 mInsideRemove = true; 830 mWebView.removeView(this); 831 mWebView.requestFocus(); 832 mInsideRemove = false; 833 } 834 835 @Override 836 public boolean requestRectangleOnScreen(Rect rectangle, boolean immediate) { 837 // Do nothing, since webkit will put the textfield on screen. 838 return true; 839 } 840 841 /** 842 * Send the DOM events for the specified event. 843 * @param event KeyEvent to be translated into a DOM event. 844 */ 845 private void sendDomEvent(KeyEvent event) { 846 mWebView.passToJavaScript(getText().toString(), event); 847 } 848 849 /** 850 * Always use this instead of setAdapter, as this has features specific to 851 * the WebTextView. 852 */ 853 public void setAdapterCustom(AutoCompleteAdapter adapter) { 854 if (adapter != null) { 855 setInputType(getInputType() 856 | EditorInfo.TYPE_TEXT_FLAG_AUTO_COMPLETE); 857 adapter.setTextView(this); 858 if (mAutoFillable) { 859 setOnItemClickListener(this); 860 } else { 861 setOnItemClickListener(null); 862 } 863 showDropDown(); 864 } else { 865 dismissDropDown(); 866 } 867 super.setAdapter(adapter); 868 } 869 870 /** 871 * This is a special version of ArrayAdapter which changes its text size 872 * to match the text size of its host TextView. 873 */ 874 public static class AutoCompleteAdapter extends ArrayAdapter<String> { 875 private TextView mTextView; 876 877 public AutoCompleteAdapter(Context context, ArrayList<String> entries) { 878 super(context, com.android.internal.R.layout 879 .web_text_view_dropdown, entries); 880 } 881 882 /** 883 * {@inheritDoc} 884 */ 885 @Override 886 public View getView(int position, View convertView, ViewGroup parent) { 887 TextView tv = 888 (TextView) super.getView(position, convertView, parent); 889 if (tv != null && mTextView != null) { 890 tv.setTextSize(mTextView.getTextSize()); 891 } 892 return tv; 893 } 894 895 /** 896 * Set the TextView so we can match its text size. 897 */ 898 private void setTextView(TextView tv) { 899 mTextView = tv; 900 } 901 } 902 903 /** 904 * Sets the selection when the user clicks on a textfield or textarea with 905 * the trackball or center key, or starts typing into it without clicking on 906 * it. 907 */ 908 /* package */ void setDefaultSelection() { 909 Spannable text = (Spannable) getText(); 910 int selection = mSingle ? text.length() : 0; 911 if (Selection.getSelectionStart(text) == selection 912 && Selection.getSelectionEnd(text) == selection) { 913 // The selection of the UI copy is set correctly, but the 914 // WebTextView still needs to inform the webkit thread to set the 915 // selection. Normally that is done in onSelectionChanged, but 916 // onSelectionChanged will not be called because the UI copy is not 917 // changing. (This can happen when the WebTextView takes focus. 918 // That onSelectionChanged was blocked because the selection set 919 // when focusing is not necessarily the desirable selection for 920 // WebTextView.) 921 if (mWebView != null) { 922 mWebView.setSelection(selection, selection); 923 } 924 } else { 925 Selection.setSelection(text, selection, selection); 926 } 927 if (mWebView != null) mWebView.incrementTextGeneration(); 928 } 929 930 /** 931 * Determine whether to use the system-wide password disguising method, 932 * or to use none. 933 * @param inPassword True if the textfield is a password field. 934 */ 935 /* package */ void setInPassword(boolean inPassword) { 936 if (inPassword) { 937 setInputType(EditorInfo.TYPE_CLASS_TEXT | EditorInfo. 938 TYPE_TEXT_VARIATION_WEB_PASSWORD); 939 createBackground(); 940 } 941 // For password fields, draw the WebTextView. For others, just show 942 // webkit's drawing. 943 if (!DebugFlags.DRAW_WEBTEXTVIEW) { 944 setWillNotDraw(!inPassword); 945 } 946 setBackgroundDrawable(inPassword ? mBackground : null); 947 } 948 949 /** 950 * Private class used for the background of a password textfield. 951 */ 952 private static class OutlineDrawable extends Drawable { 953 private Paint mBackgroundPaint; 954 private Paint mOutlinePaint; 955 private float[] mLines; 956 public OutlineDrawable() { 957 mBackgroundPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 958 mBackgroundPaint.setColor(Color.WHITE); 959 960 mOutlinePaint = new Paint(Paint.ANTI_ALIAS_FLAG); 961 mOutlinePaint.setColor(Color.BLACK); 962 mOutlinePaint.setStyle(Paint.Style.STROKE); 963 964 mLines = new float[16]; 965 } 966 @Override 967 public void setBounds(int left, int top, int right, int bottom) { 968 super.setBounds(left, top, right, bottom); 969 bottom--; 970 right -= 2; 971 // Top line 972 mLines[0] = left; 973 mLines[1] = top + 1; 974 mLines[2] = right; 975 mLines[3] = top + 1; 976 // Right line 977 mLines[4] = right; 978 mLines[5] = top; 979 mLines[6] = right; 980 mLines[7] = bottom; 981 // Bottom line 982 mLines[8] = left; 983 mLines[9] = bottom; 984 mLines[10] = right; 985 mLines[11] = bottom; 986 // Left line 987 mLines[12] = left + 1; 988 mLines[13] = top; 989 mLines[14] = left + 1; 990 mLines[15] = bottom; 991 } 992 @Override 993 public void draw(Canvas canvas) { 994 // Draw the background. 995 canvas.drawRect(getBounds(), mBackgroundPaint); 996 // Draw the outline. 997 canvas.drawLines(mLines, mOutlinePaint); 998 } 999 // Always want it to be opaque. 1000 @Override 1001 public int getOpacity() { 1002 return PixelFormat.OPAQUE; 1003 } 1004 // These are needed because they are abstract in Drawable. 1005 @Override 1006 public void setAlpha(int alpha) { } 1007 @Override 1008 public void setColorFilter(ColorFilter cf) { } 1009 } 1010 1011 /** 1012 * Create a background for the WebTextView and set up the paint for drawing 1013 * the text. This way, we can see the password transformation of the 1014 * system, which (optionally) shows the actual text before changing to dots. 1015 * The background is necessary to hide the webkit-drawn text beneath. 1016 */ 1017 private void createBackground() { 1018 if (mBackground != null) { 1019 return; 1020 } 1021 mBackground = new OutlineDrawable(); 1022 1023 setGravity(Gravity.CENTER_VERTICAL); 1024 } 1025 1026 @Override 1027 public void setInputType(int type) { 1028 mFromSetInputType = true; 1029 super.setInputType(type); 1030 mFromSetInputType = false; 1031 } 1032 1033 private void setMaxLength(int maxLength) { 1034 mMaxLength = maxLength; 1035 if (-1 == maxLength) { 1036 setFilters(NO_FILTERS); 1037 } else { 1038 setFilters(new InputFilter[] { 1039 new InputFilter.LengthFilter(maxLength) }); 1040 } 1041 } 1042 1043 /** 1044 * Set the pointer for this node so it can be determined which node this 1045 * WebTextView represents. 1046 * @param ptr Integer representing the pointer to the node which this 1047 * WebTextView represents. 1048 */ 1049 /* package */ void setNodePointer(int ptr) { 1050 mNodePointer = ptr; 1051 } 1052 1053 /** 1054 * Determine the position and size of WebTextView, and add it to the 1055 * WebView's view heirarchy. All parameters are presumed to be in 1056 * view coordinates. Also requests Focus and sets the cursor to not 1057 * request to be in view. 1058 * @param x x-position of the textfield. 1059 * @param y y-position of the textfield. 1060 * @param width width of the textfield. 1061 * @param height height of the textfield. 1062 */ 1063 /* package */ void setRect(int x, int y, int width, int height) { 1064 LayoutParams lp = (LayoutParams) getLayoutParams(); 1065 if (null == lp) { 1066 lp = new LayoutParams(width, height, x, y); 1067 } else { 1068 lp.x = x; 1069 lp.y = y; 1070 lp.width = width; 1071 lp.height = height; 1072 } 1073 if (getParent() == null) { 1074 mWebView.addView(this, lp); 1075 } else { 1076 setLayoutParams(lp); 1077 } 1078 // Set up a measure spec so a layout can always be recreated. 1079 mWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY); 1080 mHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY); 1081 } 1082 1083 /** 1084 * Set the selection, and disable our onSelectionChanged action. 1085 */ 1086 /* package */ void setSelectionFromWebKit(int start, int end) { 1087 if (start < 0 || end < 0) return; 1088 Spannable text = (Spannable) getText(); 1089 int length = text.length(); 1090 if (start > length || end > length) return; 1091 mFromWebKit = true; 1092 Selection.setSelection(text, start, end); 1093 mFromWebKit = false; 1094 } 1095 1096 /** 1097 * Update the text size according to the size of the focus candidate's text 1098 * size in mWebView. Should only be called from mWebView. 1099 */ 1100 /* package */ void updateTextSize() { 1101 Assert.assertNotNull("updateTextSize should only be called from " 1102 + "mWebView, so mWebView should never be null!", mWebView); 1103 // Note that this is approximately WebView.contentToViewDimension, 1104 // without being rounded. 1105 float size = mWebView.nativeFocusCandidateTextSize() 1106 * mWebView.getScale(); 1107 setTextSize(TypedValue.COMPLEX_UNIT_PX, size); 1108 } 1109 1110 /** 1111 * Set the text to the new string, but use the old selection, making sure 1112 * to keep it within the new string. 1113 * @param text The new text to place in the textfield. 1114 */ 1115 /* package */ void setTextAndKeepSelection(String text) { 1116 mPreChange = text.toString(); 1117 Editable edit = getText(); 1118 int selStart = Selection.getSelectionStart(edit); 1119 int selEnd = Selection.getSelectionEnd(edit); 1120 mInSetTextAndKeepSelection = true; 1121 edit.replace(0, edit.length(), text); 1122 int newLength = edit.length(); 1123 if (selStart > newLength) selStart = newLength; 1124 if (selEnd > newLength) selEnd = newLength; 1125 Selection.setSelection(edit, selStart, selEnd); 1126 mInSetTextAndKeepSelection = false; 1127 InputMethodManager imm = InputMethodManager.peekInstance(); 1128 if (imm != null && imm.isActive(this)) { 1129 // Since the text has changed, do not allow the IME to replace the 1130 // existing text as though it were a completion. 1131 imm.restartInput(this); 1132 } 1133 updateCachedTextfield(); 1134 } 1135 1136 /** 1137 * Called by WebView.rebuildWebTextView(). Based on the type of the <input> 1138 * element, set up the WebTextView, its InputType, and IME Options properly. 1139 * @param type int corresponding to enum "Type" defined in CachedInput.h. 1140 * Does not correspond to HTMLInputElement::InputType so this 1141 * is unaffected if that changes, and also because that has no 1142 * type corresponding to textarea (which is its own tag). 1143 */ 1144 /* package */ void setType(int type) { 1145 if (mWebView == null) return; 1146 boolean single = true; 1147 boolean inPassword = false; 1148 int maxLength = -1; 1149 int inputType = EditorInfo.TYPE_CLASS_TEXT 1150 | EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT; 1151 int imeOptions = EditorInfo.IME_FLAG_NO_EXTRACT_UI 1152 | EditorInfo.IME_FLAG_NO_FULLSCREEN; 1153 if (TEXT_AREA != type 1154 && mWebView.nativeFocusCandidateHasNextTextfield()) { 1155 imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT; 1156 } 1157 switch (type) { 1158 case NORMAL_TEXT_FIELD: 1159 imeOptions |= EditorInfo.IME_ACTION_GO; 1160 break; 1161 case TEXT_AREA: 1162 single = false; 1163 inputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE 1164 | EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES 1165 | EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT; 1166 imeOptions |= EditorInfo.IME_ACTION_NONE; 1167 break; 1168 case PASSWORD: 1169 inPassword = true; 1170 imeOptions |= EditorInfo.IME_ACTION_GO; 1171 break; 1172 case SEARCH: 1173 imeOptions |= EditorInfo.IME_ACTION_SEARCH; 1174 break; 1175 case EMAIL: 1176 inputType |= EditorInfo.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS; 1177 imeOptions |= EditorInfo.IME_ACTION_GO; 1178 break; 1179 case NUMBER: 1180 inputType |= EditorInfo.TYPE_CLASS_NUMBER; 1181 // Number and telephone do not have both a Tab key and an 1182 // action, so set the action to NEXT 1183 imeOptions |= EditorInfo.IME_ACTION_NEXT; 1184 break; 1185 case TELEPHONE: 1186 inputType |= EditorInfo.TYPE_CLASS_PHONE; 1187 imeOptions |= EditorInfo.IME_ACTION_NEXT; 1188 break; 1189 case URL: 1190 // TYPE_TEXT_VARIATION_URI prevents Tab key from showing, so 1191 // exclude it for now. 1192 imeOptions |= EditorInfo.IME_ACTION_GO; 1193 break; 1194 default: 1195 imeOptions |= EditorInfo.IME_ACTION_GO; 1196 break; 1197 } 1198 setHint(null); 1199 if (single) { 1200 mWebView.requestLabel(mWebView.nativeFocusCandidateFramePointer(), 1201 mNodePointer); 1202 maxLength = mWebView.nativeFocusCandidateMaxLength(); 1203 boolean autoComplete = mWebView.nativeFocusCandidateIsAutoComplete(); 1204 if (type != PASSWORD && (mAutoFillable || autoComplete)) { 1205 String name = mWebView.nativeFocusCandidateName(); 1206 if (name != null && name.length() > 0) { 1207 mWebView.requestFormData(name, mNodePointer, mAutoFillable, 1208 autoComplete); 1209 } 1210 } 1211 } 1212 mSingle = single; 1213 setMaxLength(maxLength); 1214 setHorizontallyScrolling(single); 1215 setInputType(inputType); 1216 setImeOptions(imeOptions); 1217 setInPassword(inPassword); 1218 AutoCompleteAdapter adapter = null; 1219 setAdapterCustom(adapter); 1220 } 1221 1222 /** 1223 * Update the cache to reflect the current text. 1224 */ 1225 /* package */ void updateCachedTextfield() { 1226 mWebView.updateCachedTextfield(getText().toString()); 1227 } 1228 1229 /* package */ void setAutoFillProfileIsSet(boolean autoFillProfileIsSet) { 1230 mAutoFillProfileIsSet = autoFillProfileIsSet; 1231 } 1232} 1233