WebTextView.java revision 03e0119c93f7a9a9e54cc74dde2a2fd07ae0a944
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.Handler; 30import android.os.Message; 31import android.text.BoringLayout.Metrics; 32import android.text.DynamicLayout; 33import android.text.Editable; 34import android.text.InputFilter; 35import android.text.Layout; 36import android.text.Layout.Alignment; 37import android.text.Selection; 38import android.text.Spannable; 39import android.text.TextPaint; 40import android.text.TextUtils; 41import android.text.method.MovementMethod; 42import android.text.method.Touch; 43import android.util.Log; 44import android.util.TypedValue; 45import android.view.Gravity; 46import android.view.KeyCharacterMap; 47import android.view.KeyEvent; 48import android.view.MotionEvent; 49import android.view.View; 50import android.view.ViewConfiguration; 51import android.view.ViewGroup; 52import android.view.inputmethod.EditorInfo; 53import android.view.inputmethod.InputMethodManager; 54import android.view.inputmethod.InputConnection; 55import android.widget.AbsoluteLayout.LayoutParams; 56import android.widget.AdapterView; 57import android.widget.ArrayAdapter; 58import android.widget.AutoCompleteTextView; 59import android.widget.TextView; 60 61import java.util.ArrayList; 62 63import junit.framework.Assert; 64 65/** 66 * WebTextView is a specialized version of EditText used by WebView 67 * to overlay html textfields (and textareas) to use our standard 68 * text editing. 69 */ 70/* package */ class WebTextView extends AutoCompleteTextView 71 implements AdapterView.OnItemClickListener { 72 73 static final String LOGTAG = "webtextview"; 74 75 private WebView mWebView; 76 private boolean mSingle; 77 private int mWidthSpec; 78 private int mHeightSpec; 79 private int mNodePointer; 80 // FIXME: This is a hack for blocking unmatched key ups, in particular 81 // on the enter key. The method for blocking unmatched key ups prevents 82 // the shift key from working properly. 83 private boolean mGotEnterDown; 84 private int mMaxLength; 85 // Keep track of the text before the change so we know whether we actually 86 // need to send down the DOM events. 87 private String mPreChange; 88 private Drawable mBackground; 89 // Variables for keeping track of the touch down, to send to the WebView 90 // when a drag starts 91 private float mDragStartX; 92 private float mDragStartY; 93 private long mDragStartTime; 94 private boolean mDragSent; 95 // True if the most recent drag event has caused either the TextView to 96 // scroll or the web page to scroll. Gets reset after a touch down. 97 private boolean mScrolled; 98 // Whether or not a selection change was generated from webkit. If it was, 99 // we do not need to pass the selection back to webkit. 100 private boolean mFromWebKit; 101 // Whether or not a selection change was generated from the WebTextView 102 // gaining focus. If it is, we do not want to pass it to webkit. This 103 // selection comes from the MovementMethod, but we behave differently. If 104 // WebTextView gained focus from a touch, webkit will determine the 105 // selection. 106 private boolean mFromFocusChange; 107 // Whether or not a selection change was generated from setInputType. We 108 // do not want to pass this change to webkit. 109 private boolean mFromSetInputType; 110 private boolean mGotTouchDown; 111 // Keep track of whether a long press has happened. Only meaningful after 112 // an ACTION_DOWN MotionEvent 113 private boolean mHasPerformedLongClick; 114 private boolean mInSetTextAndKeepSelection; 115 // Array to store the final character added in onTextChanged, so that its 116 // KeyEvents may be determined. 117 private char[] mCharacter = new char[1]; 118 // This is used to reset the length filter when on a textfield 119 // with no max length. 120 // FIXME: This can be replaced with TextView.NO_FILTERS if that 121 // is made public/protected. 122 private static final InputFilter[] NO_FILTERS = new InputFilter[0]; 123 // For keeping track of the fact that the delete key was pressed, so 124 // we can simply pass a delete key instead of calling deleteSelection. 125 private boolean mGotDelete; 126 private int mDelSelStart; 127 private int mDelSelEnd; 128 129 // Keep in sync with native constant in 130 // external/webkit/WebKit/android/WebCoreSupport/autofill/WebAutoFill.cpp 131 /* package */ static final int FORM_NOT_AUTOFILLABLE = -1; 132 133 private boolean mAutoFillable; // Is this textview part of an autofillable form? 134 private int mQueryId; 135 private boolean mAutoFillProfileIsSet; 136 // Used to determine whether onFocusChanged was called as a result of 137 // calling remove(). 138 private boolean mInsideRemove; 139 140 // Types used with setType. Keep in sync with CachedInput.h 141 private static final int NORMAL_TEXT_FIELD = 0; 142 private static final int TEXT_AREA = 1; 143 private static final int PASSWORD = 2; 144 private static final int SEARCH = 3; 145 private static final int EMAIL = 4; 146 private static final int NUMBER = 5; 147 private static final int TELEPHONE = 6; 148 private static final int URL = 7; 149 150 private static final int AUTOFILL_FORM = 100; 151 private Handler mHandler; 152 153 /** 154 * Create a new WebTextView. 155 * @param context The Context for this WebTextView. 156 * @param webView The WebView that created this. 157 */ 158 /* package */ WebTextView(Context context, WebView webView, int autoFillQueryId) { 159 super(context, null, com.android.internal.R.attr.webTextViewStyle); 160 mWebView = webView; 161 mMaxLength = -1; 162 setAutoFillable(autoFillQueryId); 163 // Turn on subpixel text, and turn off kerning, so it better matches 164 // the text in webkit. 165 TextPaint paint = getPaint(); 166 int flags = paint.getFlags() & ~Paint.DEV_KERN_TEXT_FLAG 167 | Paint.SUBPIXEL_TEXT_FLAG | Paint.DITHER_FLAG; 168 paint.setFlags(flags); 169 170 // Set the text color to black, regardless of the theme. This ensures 171 // that other applications that use embedded WebViews will properly 172 // display the text in password textfields. 173 setTextColor(DebugFlags.DRAW_WEBTEXTVIEW ? Color.RED : Color.BLACK); 174 // This helps to align the text better with the text in the web page. 175 setIncludeFontPadding(false); 176 177 mHandler = new Handler() { 178 @Override 179 public void handleMessage(Message msg) { 180 switch (msg.what) { 181 case AUTOFILL_FORM: 182 mWebView.autoFillForm(mQueryId); 183 break; 184 } 185 } 186 }; 187 188 } 189 190 public void setAutoFillable(int queryId) { 191 mAutoFillable = mWebView.getSettings().getAutoFillEnabled() 192 && (queryId != FORM_NOT_AUTOFILLABLE); 193 mQueryId = queryId; 194 } 195 196 @Override 197 public boolean dispatchKeyEvent(KeyEvent event) { 198 if (event.isSystem()) { 199 return super.dispatchKeyEvent(event); 200 } 201 // Treat ACTION_DOWN and ACTION MULTIPLE the same 202 boolean down = event.getAction() != KeyEvent.ACTION_UP; 203 int keyCode = event.getKeyCode(); 204 205 boolean isArrowKey = false; 206 switch(keyCode) { 207 case KeyEvent.KEYCODE_DPAD_LEFT: 208 case KeyEvent.KEYCODE_DPAD_RIGHT: 209 case KeyEvent.KEYCODE_DPAD_UP: 210 case KeyEvent.KEYCODE_DPAD_DOWN: 211 isArrowKey = true; 212 break; 213 } 214 215 if (KeyEvent.KEYCODE_TAB == keyCode) { 216 if (down) { 217 onEditorAction(EditorInfo.IME_ACTION_NEXT); 218 } 219 return true; 220 } 221 Spannable text = (Spannable) getText(); 222 int oldStart = Selection.getSelectionStart(text); 223 int oldEnd = Selection.getSelectionEnd(text); 224 // Normally the delete key's dom events are sent via onTextChanged. 225 // However, if the cursor is at the beginning of the field, which 226 // includes the case where it has zero length, then the text is not 227 // changed, so send the events immediately. 228 if (KeyEvent.KEYCODE_DEL == keyCode) { 229 if (oldStart == 0 && oldEnd == 0) { 230 sendDomEvent(event); 231 return true; 232 } 233 if (down) { 234 mGotDelete = true; 235 mDelSelStart = oldStart; 236 mDelSelEnd = oldEnd; 237 } 238 } 239 240 if (mSingle && (KeyEvent.KEYCODE_ENTER == keyCode 241 || KeyEvent.KEYCODE_NUMPAD_ENTER == keyCode)) { 242 if (isPopupShowing()) { 243 return super.dispatchKeyEvent(event); 244 } 245 if (!down) { 246 // Hide the keyboard, since the user has just submitted this 247 // form. The submission happens thanks to the two calls 248 // to sendDomEvent. 249 InputMethodManager.getInstance(mContext) 250 .hideSoftInputFromWindow(getWindowToken(), 0); 251 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, keyCode)); 252 sendDomEvent(event); 253 } 254 return super.dispatchKeyEvent(event); 255 } else if (KeyEvent.KEYCODE_DPAD_CENTER == keyCode) { 256 // Note that this handles center key and trackball. 257 if (isPopupShowing()) { 258 return super.dispatchKeyEvent(event); 259 } 260 // Center key should be passed to a potential onClick 261 if (!down) { 262 mWebView.centerKeyPressOnTextField(); 263 } 264 // Pass to super to handle longpress. 265 return super.dispatchKeyEvent(event); 266 } 267 268 // Ensure there is a layout so arrow keys are handled properly. 269 if (getLayout() == null) { 270 measure(mWidthSpec, mHeightSpec); 271 } 272 273 int oldLength = text.length(); 274 boolean maxedOut = mMaxLength != -1 && oldLength == mMaxLength; 275 // If we are at max length, and there is a selection rather than a 276 // cursor, we need to store the text to compare later, since the key 277 // may have changed the string. 278 String oldText; 279 if (maxedOut && oldEnd != oldStart) { 280 oldText = text.toString(); 281 } else { 282 oldText = ""; 283 } 284 if (super.dispatchKeyEvent(event)) { 285 // If the WebTextView handled the key it was either an alphanumeric 286 // key, a delete, or a movement within the text. All of those are 287 // ok to pass to javascript. 288 289 // UNLESS there is a max length determined by the html. In that 290 // case, if the string was already at the max length, an 291 // alphanumeric key will be erased by the LengthFilter, 292 // so do not pass down to javascript, and instead 293 // return true. If it is an arrow key or a delete key, we can go 294 // ahead and pass it down. 295 if (KeyEvent.KEYCODE_ENTER == keyCode 296 || KeyEvent.KEYCODE_NUMPAD_ENTER == keyCode) { 297 // For multi-line text boxes, newlines will 298 // trigger onTextChanged for key down (which will send both 299 // key up and key down) but not key up. 300 mGotEnterDown = true; 301 } 302 if (maxedOut && !isArrowKey && keyCode != KeyEvent.KEYCODE_DEL) { 303 if (oldEnd == oldStart) { 304 // Return true so the key gets dropped. 305 return true; 306 } else if (!oldText.equals(getText().toString())) { 307 // FIXME: This makes the text work properly, but it 308 // does not pass down the key event, so it may not 309 // work for a textfield that has the type of 310 // behavior of GoogleSuggest. That said, it is 311 // unlikely that a site would combine the two in 312 // one textfield. 313 Spannable span = (Spannable) getText(); 314 int newStart = Selection.getSelectionStart(span); 315 int newEnd = Selection.getSelectionEnd(span); 316 mWebView.replaceTextfieldText(0, oldLength, span.toString(), 317 newStart, newEnd); 318 return true; 319 } 320 } 321 /* FIXME: 322 * In theory, we would like to send the events for the arrow keys. 323 * However, the TextView can arbitrarily change the selection (i.e. 324 * long press followed by using the trackball). Therefore, we keep 325 * in sync with the TextView via onSelectionChanged. If we also 326 * send the DOM event, we lose the correct selection. 327 if (isArrowKey) { 328 // Arrow key does not change the text, but we still want to send 329 // the DOM events. 330 sendDomEvent(event); 331 } 332 */ 333 return true; 334 } 335 // Ignore the key up event for newlines. This prevents 336 // multiple newlines in the native textarea. 337 if (mGotEnterDown && !down) { 338 return true; 339 } 340 // if it is a navigation key, pass it to WebView 341 if (isArrowKey) { 342 // WebView check the trackballtime in onKeyDown to avoid calling 343 // native from both trackball and key handling. As this is called 344 // from WebTextView, we always want WebView to check with native. 345 // Reset trackballtime to ensure it. 346 mWebView.resetTrackballTime(); 347 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 348 .onKeyUp(keyCode, event); 349 } 350 return false; 351 } 352 353 void ensureLayout() { 354 if (getLayout() == null) { 355 // Ensure we have a Layout 356 measure(mWidthSpec, mHeightSpec); 357 LayoutParams params = (LayoutParams) getLayoutParams(); 358 if (params != null) { 359 layout(params.x, params.y, params.x + params.width, 360 params.y + params.height); 361 } 362 } 363 } 364 365 /** 366 * Determine whether this WebTextView currently represents the node 367 * represented by ptr. 368 * @param ptr Pointer to a node to compare to. 369 * @return boolean Whether this WebTextView already represents the node 370 * pointed to by ptr. 371 */ 372 /* package */ boolean isSameTextField(int ptr) { 373 return ptr == mNodePointer; 374 } 375 376 /** 377 * Ensure that the underlying text field/area is lined up with the WebTextView. 378 */ 379 private void lineUpScroll() { 380 Layout layout = getLayout(); 381 if (mWebView != null && layout != null) { 382 if (mSingle) { 383 // textfields only need to be lined up horizontally. 384 float maxScrollX = layout.getLineRight(0) - getWidth(); 385 if (DebugFlags.WEB_TEXT_VIEW) { 386 Log.v(LOGTAG, "onTouchEvent x=" + mScrollX + " y=" 387 + mScrollY + " maxX=" + maxScrollX); 388 } 389 mWebView.scrollFocusedTextInputX(maxScrollX > 0 ? 390 mScrollX / maxScrollX : 0); 391 } else { 392 // textareas only need to be lined up vertically. 393 mWebView.scrollFocusedTextInputY(mScrollY); 394 } 395 } 396 } 397 398 @Override 399 protected void makeNewLayout(int w, int hintWidth, Metrics boring, 400 Metrics hintBoring, int ellipsisWidth, boolean bringIntoView) { 401 // Necessary to get a Layout to work with, and to do the other work that 402 // makeNewLayout does. 403 super.makeNewLayout(w, hintWidth, boring, hintBoring, ellipsisWidth, 404 bringIntoView); 405 406 // For fields that do not draw, create a layout which is altered so that 407 // the text lines up. 408 if (DebugFlags.DRAW_WEBTEXTVIEW || willNotDraw()) { 409 float lineHeight = -1; 410 if (mWebView != null) { 411 float height = mWebView.nativeFocusCandidateLineHeight(); 412 if (height != -1) { 413 lineHeight = height * mWebView.getScale(); 414 } 415 } 416 CharSequence text = getText(); 417 // Copy from the existing Layout. 418 mLayout = new WebTextViewLayout(text, text, getPaint(), w, 419 mLayout.getAlignment(), mLayout.getSpacingMultiplier(), 420 mLayout.getSpacingAdd(), false, null, ellipsisWidth, 421 lineHeight); 422 } 423 lineUpScroll(); 424 } 425 426 /** 427 * Custom layout which figures out its line spacing. If -1 is passed in for 428 * the height, it will use the ascent and descent from the paint to 429 * determine the line spacing. Otherwise it will use the spacing provided. 430 */ 431 private static class WebTextViewLayout extends DynamicLayout { 432 private float mLineHeight; 433 private float mDifference; 434 public WebTextViewLayout(CharSequence base, CharSequence display, 435 TextPaint paint, 436 int width, Alignment align, 437 float spacingMult, float spacingAdd, 438 boolean includepad, 439 TextUtils.TruncateAt ellipsize, int ellipsizedWidth, 440 float lineHeight) { 441 super(base, display, paint, width, align, spacingMult, spacingAdd, 442 includepad, ellipsize, ellipsizedWidth); 443 float paintLineHeight = paint.descent() - paint.ascent(); 444 if (lineHeight == -1f) { 445 mLineHeight = paintLineHeight; 446 mDifference = 0f; 447 } else { 448 mLineHeight = lineHeight; 449 // Through trial and error, I found this calculation to improve 450 // the accuracy of line placement. 451 mDifference = (lineHeight - paintLineHeight) / 2; 452 } 453 } 454 455 @Override 456 public int getLineTop(int line) { 457 return Math.round(mLineHeight * line - mDifference); 458 } 459 } 460 461 @Override public InputConnection onCreateInputConnection( 462 EditorInfo outAttrs) { 463 InputConnection connection = super.onCreateInputConnection(outAttrs); 464 if (mWebView != null) { 465 // Use the name of the textfield + the url. Use backslash as an 466 // arbitrary separator. 467 outAttrs.fieldName = mWebView.nativeFocusCandidateName() + "\\" 468 + mWebView.getUrl(); 469 } 470 return connection; 471 } 472 473 /** 474 * In general, TextView makes a call to InputMethodManager.updateSelection 475 * in onDraw. However, in the general case of WebTextView, we do not draw. 476 * This method is called by WebView.onDraw to take care of the part that 477 * needs to be called. 478 */ 479 /* package */ void onDrawSubstitute() { 480 if (!willNotDraw()) { 481 // If the WebTextView is set to draw, such as in the case of a 482 // password, onDraw calls updateSelection(), so this code path is 483 // unnecessary. 484 return; 485 } 486 // This code is copied from TextView.onDraw(). That code does not get 487 // executed, however, because the WebTextView does not draw, allowing 488 // webkit's drawing to show through. 489 InputMethodManager imm = InputMethodManager.peekInstance(); 490 if (imm != null && imm.isActive(this)) { 491 Spannable sp = (Spannable) getText(); 492 int selStart = Selection.getSelectionStart(sp); 493 int selEnd = Selection.getSelectionEnd(sp); 494 int candStart = EditableInputConnection.getComposingSpanStart(sp); 495 int candEnd = EditableInputConnection.getComposingSpanEnd(sp); 496 imm.updateSelection(this, selStart, selEnd, candStart, candEnd); 497 } 498 updateCursorControllerPositions(); 499 } 500 501 @Override 502 protected void onDraw(Canvas canvas) { 503 // onDraw should only be called for password fields. If WebTextView is 504 // still drawing, but is no longer corresponding to a password field, 505 // remove it. 506 if (!DebugFlags.DRAW_WEBTEXTVIEW && (mWebView == null 507 || !mWebView.nativeFocusCandidateIsPassword() 508 || !isSameTextField(mWebView.nativeFocusCandidatePointer()))) { 509 // Although calling remove() would seem to make more sense here, 510 // changing it to not be a password field will make it not draw. 511 // Other code will make sure that it is removed completely, but this 512 // way the user will not see it. 513 setInPassword(false); 514 } else { 515 super.onDraw(canvas); 516 } 517 } 518 519 @Override 520 public void onEditorAction(int actionCode) { 521 switch (actionCode) { 522 case EditorInfo.IME_ACTION_NEXT: 523 if (mWebView.nativeMoveCursorToNextTextInput()) { 524 // Preemptively rebuild the WebTextView, so that the action will 525 // be set properly. 526 mWebView.rebuildWebTextView(); 527 setDefaultSelection(); 528 mWebView.invalidate(); 529 } 530 break; 531 case EditorInfo.IME_ACTION_DONE: 532 super.onEditorAction(actionCode); 533 break; 534 case EditorInfo.IME_ACTION_GO: 535 case EditorInfo.IME_ACTION_SEARCH: 536 // Send an enter and hide the soft keyboard 537 InputMethodManager.getInstance(mContext) 538 .hideSoftInputFromWindow(getWindowToken(), 0); 539 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 540 KeyEvent.KEYCODE_ENTER)); 541 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 542 KeyEvent.KEYCODE_ENTER)); 543 544 default: 545 break; 546 } 547 } 548 549 @Override 550 protected void onFocusChanged(boolean focused, int direction, 551 Rect previouslyFocusedRect) { 552 mFromFocusChange = true; 553 super.onFocusChanged(focused, direction, previouslyFocusedRect); 554 if (focused) { 555 mWebView.setActive(true); 556 } else if (!mInsideRemove) { 557 mWebView.setActive(false); 558 } 559 mFromFocusChange = false; 560 } 561 562 // AdapterView.OnItemClickListener implementation 563 564 @Override 565 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 566 if (id == 0 && position == 0) { 567 // Blank out the text box while we wait for WebCore to fill the form. 568 replaceText(""); 569 WebSettings settings = mWebView.getSettings(); 570 if (mAutoFillProfileIsSet) { 571 // Call a webview method to tell WebCore to autofill the form. 572 mWebView.autoFillForm(mQueryId); 573 } else { 574 // There is no autofill profile setup yet and the user has 575 // elected to try and set one up. Call through to the 576 // embedder to action that. 577 mWebView.getWebChromeClient().setupAutoFill( 578 mHandler.obtainMessage(AUTOFILL_FORM)); 579 } 580 } 581 } 582 583 @Override 584 protected void onScrollChanged(int l, int t, int oldl, int oldt) { 585 super.onScrollChanged(l, t, oldl, oldt); 586 lineUpScroll(); 587 } 588 589 @Override 590 protected void onSelectionChanged(int selStart, int selEnd) { 591 if (!mFromWebKit && !mFromFocusChange && !mFromSetInputType 592 && mWebView != null && !mInSetTextAndKeepSelection) { 593 if (DebugFlags.WEB_TEXT_VIEW) { 594 Log.v(LOGTAG, "onSelectionChanged selStart=" + selStart 595 + " selEnd=" + selEnd); 596 } 597 mWebView.setSelection(selStart, selEnd); 598 lineUpScroll(); 599 } 600 } 601 602 @Override 603 protected void onTextChanged(CharSequence s,int start,int before,int count){ 604 super.onTextChanged(s, start, before, count); 605 String postChange = s.toString(); 606 // Prevent calls to setText from invoking onTextChanged (since this will 607 // mean we are on a different textfield). Also prevent the change when 608 // going from a textfield with a string of text to one with a smaller 609 // limit on text length from registering the onTextChanged event. 610 if (mPreChange == null || mPreChange.equals(postChange) || 611 (mMaxLength > -1 && mPreChange.length() > mMaxLength && 612 mPreChange.substring(0, mMaxLength).equals(postChange))) { 613 return; 614 } 615 mPreChange = postChange; 616 if (0 == count) { 617 if (before > 0) { 618 // For this and all changes to the text, update our cache 619 updateCachedTextfield(); 620 if (mGotDelete) { 621 mGotDelete = false; 622 int oldEnd = start + before; 623 if (mDelSelEnd == oldEnd 624 && (mDelSelStart == start 625 || (mDelSelStart == oldEnd && before == 1))) { 626 // If the selection is set up properly before the 627 // delete, send the DOM events. 628 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 629 KeyEvent.KEYCODE_DEL)); 630 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 631 KeyEvent.KEYCODE_DEL)); 632 return; 633 } 634 } 635 // This was simply a delete or a cut, so just delete the 636 // selection. 637 mWebView.deleteSelection(start, start + before); 638 } 639 mGotDelete = false; 640 // before should never be negative, so whether it was a cut 641 // (handled above), or before is 0, in which case nothing has 642 // changed, we should return. 643 return; 644 } 645 // Ensure that this flag gets cleared, since with autocorrect on, a 646 // delete key press may have a more complex result than deleting one 647 // character or the existing selection, so it will not get cleared 648 // above. 649 mGotDelete = false; 650 // Find the last character being replaced. If it can be represented by 651 // events, we will pass them to native (after replacing the beginning 652 // of the changed text), so we can see javascript events. 653 // Otherwise, replace the text being changed (including the last 654 // character) in the textfield. 655 TextUtils.getChars(s, start + count - 1, start + count, mCharacter, 0); 656 KeyCharacterMap kmap = KeyCharacterMap.load(KeyCharacterMap.VIRTUAL_KEYBOARD); 657 KeyEvent[] events = kmap.getEvents(mCharacter); 658 boolean cannotUseKeyEvents = null == events; 659 int charactersFromKeyEvents = cannotUseKeyEvents ? 0 : 1; 660 if (count > 1 || cannotUseKeyEvents) { 661 String replace = s.subSequence(start, 662 start + count - charactersFromKeyEvents).toString(); 663 mWebView.replaceTextfieldText(start, start + before, replace, 664 start + count - charactersFromKeyEvents, 665 start + count - charactersFromKeyEvents); 666 } else { 667 // This corrects the selection which may have been affected by the 668 // trackball or auto-correct. 669 if (DebugFlags.WEB_TEXT_VIEW) { 670 Log.v(LOGTAG, "onTextChanged start=" + start 671 + " start + before=" + (start + before)); 672 } 673 if (!mInSetTextAndKeepSelection) { 674 mWebView.setSelection(start, start + before); 675 } 676 } 677 if (!cannotUseKeyEvents) { 678 int length = events.length; 679 for (int i = 0; i < length; i++) { 680 // We never send modifier keys to native code so don't send them 681 // here either. 682 if (!KeyEvent.isModifierKey(events[i].getKeyCode())) { 683 sendDomEvent(events[i]); 684 } 685 } 686 } 687 updateCachedTextfield(); 688 } 689 690 @Override 691 public boolean onTouchEvent(MotionEvent event) { 692 switch (event.getAction()) { 693 case MotionEvent.ACTION_DOWN: 694 super.onTouchEvent(event); 695 // This event may be the start of a drag, so store it to pass to the 696 // WebView if it is. 697 mDragStartX = event.getX(); 698 mDragStartY = event.getY(); 699 mDragStartTime = event.getEventTime(); 700 mDragSent = false; 701 mScrolled = false; 702 mGotTouchDown = true; 703 mHasPerformedLongClick = false; 704 break; 705 case MotionEvent.ACTION_MOVE: 706 if (mHasPerformedLongClick) { 707 mGotTouchDown = false; 708 return false; 709 } 710 int slop = ViewConfiguration.get(mContext).getScaledTouchSlop(); 711 Spannable buffer = getText(); 712 int initialScrollX = Touch.getInitialScrollX(this, buffer); 713 int initialScrollY = Touch.getInitialScrollY(this, buffer); 714 super.onTouchEvent(event); 715 int dx = Math.abs(mScrollX - initialScrollX); 716 int dy = Math.abs(mScrollY - initialScrollY); 717 // Use a smaller slop when checking to see if we've moved far enough 718 // to scroll the text, because experimentally, slop has shown to be 719 // to big for the case of a small textfield. 720 int smallerSlop = slop/2; 721 if (dx > smallerSlop || dy > smallerSlop) { 722 // Scrolling is handled in onScrollChanged. 723 mScrolled = true; 724 cancelLongPress(); 725 return true; 726 } 727 if (Math.abs((int) event.getX() - mDragStartX) < slop 728 && Math.abs((int) event.getY() - mDragStartY) < slop) { 729 // If the user has not scrolled further than slop, we should not 730 // send the drag. Instead, do nothing, and when the user lifts 731 // their finger, we will change the selection. 732 return true; 733 } 734 if (mWebView != null) { 735 // Only want to set the initial state once. 736 if (!mDragSent) { 737 mWebView.initiateTextFieldDrag(mDragStartX, mDragStartY, 738 mDragStartTime); 739 mDragSent = true; 740 } 741 boolean scrolled = mWebView.textFieldDrag(event); 742 if (scrolled) { 743 mScrolled = true; 744 cancelLongPress(); 745 return true; 746 } 747 } 748 return false; 749 case MotionEvent.ACTION_UP: 750 case MotionEvent.ACTION_CANCEL: 751 super.onTouchEvent(event); 752 if (mHasPerformedLongClick) { 753 mGotTouchDown = false; 754 return false; 755 } 756 if (!mScrolled) { 757 // If the page scrolled, or the TextView scrolled, we do not 758 // want to change the selection 759 cancelLongPress(); 760 if (mGotTouchDown && mWebView != null) { 761 mWebView.touchUpOnTextField(event); 762 } 763 } 764 // Necessary for the WebView to reset its state 765 if (mWebView != null && mDragSent) { 766 mWebView.onTouchEvent(event); 767 } 768 mGotTouchDown = false; 769 break; 770 default: 771 break; 772 } 773 return true; 774 } 775 776 @Override 777 public boolean onTrackballEvent(MotionEvent event) { 778 if (isPopupShowing()) { 779 return super.onTrackballEvent(event); 780 } 781 if (event.getAction() != MotionEvent.ACTION_MOVE) { 782 return false; 783 } 784 Spannable text = getText(); 785 MovementMethod move = getMovementMethod(); 786 if (move != null && getLayout() != null && 787 move.onTrackballEvent(this, text, event)) { 788 // Selection is changed in onSelectionChanged 789 return true; 790 } 791 return false; 792 } 793 794 @Override 795 public boolean performLongClick() { 796 mHasPerformedLongClick = true; 797 return super.performLongClick(); 798 } 799 800 /** 801 * Remove this WebTextView from its host WebView, and return 802 * focus to the host. 803 */ 804 /* package */ void remove() { 805 // hide the soft keyboard when the edit text is out of focus 806 InputMethodManager imm = InputMethodManager.getInstance(mContext); 807 if (imm.isActive(this)) { 808 imm.hideSoftInputFromWindow(getWindowToken(), 0); 809 } 810 mInsideRemove = true; 811 mWebView.removeView(this); 812 mWebView.requestFocus(); 813 mInsideRemove = false; 814 } 815 816 @Override 817 public boolean requestRectangleOnScreen(Rect rectangle, boolean immediate) { 818 // Do nothing, since webkit will put the textfield on screen. 819 return true; 820 } 821 822 /** 823 * Send the DOM events for the specified event. 824 * @param event KeyEvent to be translated into a DOM event. 825 */ 826 private void sendDomEvent(KeyEvent event) { 827 mWebView.passToJavaScript(getText().toString(), event); 828 } 829 830 /** 831 * Always use this instead of setAdapter, as this has features specific to 832 * the WebTextView. 833 */ 834 public void setAdapterCustom(AutoCompleteAdapter adapter) { 835 if (adapter != null) { 836 setInputType(getInputType() 837 | EditorInfo.TYPE_TEXT_FLAG_AUTO_COMPLETE); 838 adapter.setTextView(this); 839 if (mAutoFillable) { 840 setOnItemClickListener(this); 841 } else { 842 setOnItemClickListener(null); 843 } 844 showDropDown(); 845 } else { 846 dismissDropDown(); 847 } 848 super.setAdapter(adapter); 849 } 850 851 /** 852 * This is a special version of ArrayAdapter which changes its text size 853 * to match the text size of its host TextView. 854 */ 855 public static class AutoCompleteAdapter extends ArrayAdapter<String> { 856 private TextView mTextView; 857 858 public AutoCompleteAdapter(Context context, ArrayList<String> entries) { 859 super(context, com.android.internal.R.layout 860 .web_text_view_dropdown, entries); 861 } 862 863 /** 864 * {@inheritDoc} 865 */ 866 @Override 867 public View getView(int position, View convertView, ViewGroup parent) { 868 TextView tv = 869 (TextView) super.getView(position, convertView, parent); 870 if (tv != null && mTextView != null) { 871 tv.setTextSize(mTextView.getTextSize()); 872 } 873 return tv; 874 } 875 876 /** 877 * Set the TextView so we can match its text size. 878 */ 879 private void setTextView(TextView tv) { 880 mTextView = tv; 881 } 882 } 883 884 /** 885 * Sets the selection when the user clicks on a textfield or textarea with 886 * the trackball or center key, or starts typing into it without clicking on 887 * it. 888 */ 889 /* package */ void setDefaultSelection() { 890 Spannable text = (Spannable) getText(); 891 int selection = mSingle ? text.length() : 0; 892 if (Selection.getSelectionStart(text) == selection 893 && Selection.getSelectionEnd(text) == selection) { 894 // The selection of the UI copy is set correctly, but the 895 // WebTextView still needs to inform the webkit thread to set the 896 // selection. Normally that is done in onSelectionChanged, but 897 // onSelectionChanged will not be called because the UI copy is not 898 // changing. (This can happen when the WebTextView takes focus. 899 // That onSelectionChanged was blocked because the selection set 900 // when focusing is not necessarily the desirable selection for 901 // WebTextView.) 902 if (mWebView != null) { 903 mWebView.setSelection(selection, selection); 904 } 905 } else { 906 Selection.setSelection(text, selection, selection); 907 } 908 if (mWebView != null) mWebView.incrementTextGeneration(); 909 } 910 911 /** 912 * Determine whether to use the system-wide password disguising method, 913 * or to use none. 914 * @param inPassword True if the textfield is a password field. 915 */ 916 /* package */ void setInPassword(boolean inPassword) { 917 if (inPassword) { 918 setInputType(EditorInfo.TYPE_CLASS_TEXT | EditorInfo. 919 TYPE_TEXT_VARIATION_WEB_PASSWORD); 920 createBackground(); 921 } 922 // For password fields, draw the WebTextView. For others, just show 923 // webkit's drawing. 924 if (!DebugFlags.DRAW_WEBTEXTVIEW) { 925 setWillNotDraw(!inPassword); 926 } 927 setBackgroundDrawable(inPassword ? mBackground : null); 928 } 929 930 /** 931 * Private class used for the background of a password textfield. 932 */ 933 private static class OutlineDrawable extends Drawable { 934 private Paint mBackgroundPaint; 935 private Paint mOutlinePaint; 936 private float[] mLines; 937 public OutlineDrawable() { 938 mBackgroundPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 939 mBackgroundPaint.setColor(Color.WHITE); 940 941 mOutlinePaint = new Paint(Paint.ANTI_ALIAS_FLAG); 942 mOutlinePaint.setColor(Color.BLACK); 943 mOutlinePaint.setStyle(Paint.Style.STROKE); 944 945 mLines = new float[16]; 946 } 947 @Override 948 public void setBounds(int left, int top, int right, int bottom) { 949 super.setBounds(left, top, right, bottom); 950 // Top line 951 mLines[0] = left; 952 mLines[1] = top + 1; 953 mLines[2] = right; 954 mLines[3] = top + 1; 955 // Right line 956 mLines[4] = right; 957 mLines[5] = top; 958 mLines[6] = right; 959 mLines[7] = bottom; 960 // Bottom line 961 mLines[8] = left; 962 mLines[9] = bottom; 963 mLines[10] = right; 964 mLines[11] = bottom; 965 // Left line 966 mLines[12] = left + 1; 967 mLines[13] = top; 968 mLines[14] = left + 1; 969 mLines[15] = bottom; 970 } 971 @Override 972 public void draw(Canvas canvas) { 973 // Draw the background. 974 canvas.drawRect(getBounds(), mBackgroundPaint); 975 // Draw the outline. 976 canvas.drawLines(mLines, mOutlinePaint); 977 } 978 // Always want it to be opaque. 979 @Override 980 public int getOpacity() { 981 return PixelFormat.OPAQUE; 982 } 983 // These are needed because they are abstract in Drawable. 984 @Override 985 public void setAlpha(int alpha) { } 986 @Override 987 public void setColorFilter(ColorFilter cf) { } 988 } 989 990 /** 991 * Create a background for the WebTextView and set up the paint for drawing 992 * the text. This way, we can see the password transformation of the 993 * system, which (optionally) shows the actual text before changing to dots. 994 * The background is necessary to hide the webkit-drawn text beneath. 995 */ 996 private void createBackground() { 997 if (mBackground != null) { 998 return; 999 } 1000 mBackground = new OutlineDrawable(); 1001 1002 setGravity(Gravity.CENTER_VERTICAL); 1003 } 1004 1005 @Override 1006 public void setInputType(int type) { 1007 mFromSetInputType = true; 1008 super.setInputType(type); 1009 mFromSetInputType = false; 1010 } 1011 1012 private void setMaxLength(int maxLength) { 1013 mMaxLength = maxLength; 1014 if (-1 == maxLength) { 1015 setFilters(NO_FILTERS); 1016 } else { 1017 setFilters(new InputFilter[] { 1018 new InputFilter.LengthFilter(maxLength) }); 1019 } 1020 } 1021 1022 /** 1023 * Set the pointer for this node so it can be determined which node this 1024 * WebTextView represents. 1025 * @param ptr Integer representing the pointer to the node which this 1026 * WebTextView represents. 1027 */ 1028 /* package */ void setNodePointer(int ptr) { 1029 mNodePointer = ptr; 1030 } 1031 1032 /** 1033 * Determine the position and size of WebTextView, and add it to the 1034 * WebView's view heirarchy. All parameters are presumed to be in 1035 * view coordinates. Also requests Focus and sets the cursor to not 1036 * request to be in view. 1037 * @param x x-position of the textfield. 1038 * @param y y-position of the textfield. 1039 * @param width width of the textfield. 1040 * @param height height of the textfield. 1041 */ 1042 /* package */ void setRect(int x, int y, int width, int height) { 1043 LayoutParams lp = (LayoutParams) getLayoutParams(); 1044 if (null == lp) { 1045 lp = new LayoutParams(width, height, x, y); 1046 } else { 1047 lp.x = x; 1048 lp.y = y; 1049 lp.width = width; 1050 lp.height = height; 1051 } 1052 if (getParent() == null) { 1053 mWebView.addView(this, lp); 1054 } else { 1055 setLayoutParams(lp); 1056 } 1057 // Set up a measure spec so a layout can always be recreated. 1058 mWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY); 1059 mHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY); 1060 } 1061 1062 /** 1063 * Set the selection, and disable our onSelectionChanged action. 1064 */ 1065 /* package */ void setSelectionFromWebKit(int start, int end) { 1066 if (start < 0 || end < 0) return; 1067 Spannable text = (Spannable) getText(); 1068 int length = text.length(); 1069 if (start > length || end > length) return; 1070 mFromWebKit = true; 1071 Selection.setSelection(text, start, end); 1072 mFromWebKit = false; 1073 } 1074 1075 /** 1076 * Update the text size according to the size of the focus candidate's text 1077 * size in mWebView. Should only be called from mWebView. 1078 */ 1079 /* package */ void updateTextSize() { 1080 Assert.assertNotNull("updateTextSize should only be called from " 1081 + "mWebView, so mWebView should never be null!", mWebView); 1082 // Note that this is approximately WebView.contentToViewDimension, 1083 // without being rounded. 1084 float size = mWebView.nativeFocusCandidateTextSize() 1085 * mWebView.getScale(); 1086 setTextSize(TypedValue.COMPLEX_UNIT_PX, size); 1087 } 1088 1089 /** 1090 * Set the text to the new string, but use the old selection, making sure 1091 * to keep it within the new string. 1092 * @param text The new text to place in the textfield. 1093 */ 1094 /* package */ void setTextAndKeepSelection(String text) { 1095 mPreChange = text.toString(); 1096 Editable edit = getText(); 1097 int selStart = Selection.getSelectionStart(edit); 1098 int selEnd = Selection.getSelectionEnd(edit); 1099 mInSetTextAndKeepSelection = true; 1100 edit.replace(0, edit.length(), text); 1101 int newLength = edit.length(); 1102 if (selStart > newLength) selStart = newLength; 1103 if (selEnd > newLength) selEnd = newLength; 1104 Selection.setSelection(edit, selStart, selEnd); 1105 mInSetTextAndKeepSelection = false; 1106 InputMethodManager imm = InputMethodManager.peekInstance(); 1107 if (imm != null && imm.isActive(this)) { 1108 // Since the text has changed, do not allow the IME to replace the 1109 // existing text as though it were a completion. 1110 imm.restartInput(this); 1111 } 1112 updateCachedTextfield(); 1113 } 1114 1115 /** 1116 * Called by WebView.rebuildWebTextView(). Based on the type of the <input> 1117 * element, set up the WebTextView, its InputType, and IME Options properly. 1118 * @param type int corresponding to enum "Type" defined in CachedInput.h. 1119 * Does not correspond to HTMLInputElement::InputType so this 1120 * is unaffected if that changes, and also because that has no 1121 * type corresponding to textarea (which is its own tag). 1122 */ 1123 /* package */ void setType(int type) { 1124 if (mWebView == null) return; 1125 boolean single = true; 1126 boolean inPassword = false; 1127 int maxLength = -1; 1128 int inputType = EditorInfo.TYPE_CLASS_TEXT 1129 | EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT; 1130 int imeOptions = EditorInfo.IME_FLAG_NO_EXTRACT_UI 1131 | EditorInfo.IME_FLAG_NO_FULLSCREEN; 1132 if (TEXT_AREA != type 1133 && mWebView.nativeFocusCandidateHasNextTextfield()) { 1134 imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT; 1135 } 1136 switch (type) { 1137 case NORMAL_TEXT_FIELD: 1138 imeOptions |= EditorInfo.IME_ACTION_GO; 1139 break; 1140 case TEXT_AREA: 1141 single = false; 1142 inputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE 1143 | EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES 1144 | EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT; 1145 imeOptions |= EditorInfo.IME_ACTION_NONE; 1146 break; 1147 case PASSWORD: 1148 inPassword = true; 1149 imeOptions |= EditorInfo.IME_ACTION_GO; 1150 break; 1151 case SEARCH: 1152 imeOptions |= EditorInfo.IME_ACTION_SEARCH; 1153 break; 1154 case EMAIL: 1155 inputType = EditorInfo.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS; 1156 imeOptions |= EditorInfo.IME_ACTION_GO; 1157 break; 1158 case NUMBER: 1159 inputType |= EditorInfo.TYPE_CLASS_NUMBER; 1160 // Number and telephone do not have both a Tab key and an 1161 // action, so set the action to NEXT 1162 imeOptions |= EditorInfo.IME_ACTION_NEXT; 1163 break; 1164 case TELEPHONE: 1165 inputType |= EditorInfo.TYPE_CLASS_PHONE; 1166 imeOptions |= EditorInfo.IME_ACTION_NEXT; 1167 break; 1168 case URL: 1169 // TYPE_TEXT_VARIATION_URI prevents Tab key from showing, so 1170 // exclude it for now. 1171 imeOptions |= EditorInfo.IME_ACTION_GO; 1172 break; 1173 default: 1174 imeOptions |= EditorInfo.IME_ACTION_GO; 1175 break; 1176 } 1177 setHint(null); 1178 if (single) { 1179 mWebView.requestLabel(mWebView.nativeFocusCandidateFramePointer(), 1180 mNodePointer); 1181 maxLength = mWebView.nativeFocusCandidateMaxLength(); 1182 boolean autoComplete = mWebView.nativeFocusCandidateIsAutoComplete(); 1183 if (type != PASSWORD && (mAutoFillable || autoComplete)) { 1184 String name = mWebView.nativeFocusCandidateName(); 1185 if (name != null && name.length() > 0) { 1186 mWebView.requestFormData(name, mNodePointer, mAutoFillable, 1187 autoComplete); 1188 } 1189 } 1190 } 1191 mSingle = single; 1192 setMaxLength(maxLength); 1193 setHorizontallyScrolling(single); 1194 setInputType(inputType); 1195 setImeOptions(imeOptions); 1196 setInPassword(inPassword); 1197 AutoCompleteAdapter adapter = null; 1198 setAdapterCustom(adapter); 1199 } 1200 1201 /** 1202 * Update the cache to reflect the current text. 1203 */ 1204 /* package */ void updateCachedTextfield() { 1205 mWebView.updateCachedTextfield(getText().toString()); 1206 } 1207 1208 /* package */ void setAutoFillProfileIsSet(boolean autoFillProfileIsSet) { 1209 mAutoFillProfileIsSet = autoFillProfileIsSet; 1210 } 1211} 1212