WebTextView.java revision d69b701284c14a382565f4d0d194143a09dd5418
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.InputMethodManager; 55import android.view.inputmethod.InputConnection; 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 updateCursorControllerPositions(); 519 } 520 521 @Override 522 protected void onDraw(Canvas canvas) { 523 // onDraw should only be called for password fields. If WebTextView is 524 // still drawing, but is no longer corresponding to a password field, 525 // remove it. 526 if (!DebugFlags.DRAW_WEBTEXTVIEW && (mWebView == null 527 || !mWebView.nativeFocusCandidateIsPassword() 528 || !isSameTextField(mWebView.nativeFocusCandidatePointer()))) { 529 // Although calling remove() would seem to make more sense here, 530 // changing it to not be a password field will make it not draw. 531 // Other code will make sure that it is removed completely, but this 532 // way the user will not see it. 533 setInPassword(false); 534 } else { 535 super.onDraw(canvas); 536 } 537 } 538 539 @Override 540 public void onEditorAction(int actionCode) { 541 switch (actionCode) { 542 case EditorInfo.IME_ACTION_NEXT: 543 if (mWebView.nativeMoveCursorToNextTextInput()) { 544 // Preemptively rebuild the WebTextView, so that the action will 545 // be set properly. 546 mWebView.rebuildWebTextView(); 547 setDefaultSelection(); 548 mWebView.invalidate(); 549 } 550 break; 551 case EditorInfo.IME_ACTION_DONE: 552 super.onEditorAction(actionCode); 553 break; 554 case EditorInfo.IME_ACTION_GO: 555 case EditorInfo.IME_ACTION_SEARCH: 556 // Send an enter and hide the soft keyboard 557 InputMethodManager.getInstance(mContext) 558 .hideSoftInputFromWindow(getWindowToken(), 0); 559 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 560 KeyEvent.KEYCODE_ENTER)); 561 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 562 KeyEvent.KEYCODE_ENTER)); 563 564 default: 565 break; 566 } 567 } 568 569 @Override 570 protected void onFocusChanged(boolean focused, int direction, 571 Rect previouslyFocusedRect) { 572 mFromFocusChange = true; 573 super.onFocusChanged(focused, direction, previouslyFocusedRect); 574 if (focused) { 575 mWebView.setActive(true); 576 } else if (!mInsideRemove) { 577 mWebView.setActive(false); 578 } 579 mFromFocusChange = false; 580 } 581 582 // AdapterView.OnItemClickListener implementation 583 584 @Override 585 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 586 if (id == 0 && position == 0) { 587 // Blank out the text box while we wait for WebCore to fill the form. 588 replaceText(""); 589 WebSettings settings = mWebView.getSettings(); 590 if (mAutoFillProfileIsSet) { 591 // Call a webview method to tell WebCore to autofill the form. 592 mWebView.autoFillForm(mQueryId); 593 } else { 594 // There is no autofill profile setup yet and the user has 595 // elected to try and set one up. Call through to the 596 // embedder to action that. 597 mWebView.getWebChromeClient().setupAutoFill( 598 mHandler.obtainMessage(AUTOFILL_FORM)); 599 } 600 } 601 } 602 603 @Override 604 protected void onScrollChanged(int l, int t, int oldl, int oldt) { 605 super.onScrollChanged(l, t, oldl, oldt); 606 lineUpScroll(); 607 } 608 609 @Override 610 protected void onSelectionChanged(int selStart, int selEnd) { 611 if (!mFromWebKit && !mFromFocusChange && !mFromSetInputType 612 && mWebView != null && !mInSetTextAndKeepSelection) { 613 if (DebugFlags.WEB_TEXT_VIEW) { 614 Log.v(LOGTAG, "onSelectionChanged selStart=" + selStart 615 + " selEnd=" + selEnd); 616 } 617 mWebView.setSelection(selStart, selEnd); 618 lineUpScroll(); 619 } 620 } 621 622 @Override 623 protected void onTextChanged(CharSequence s,int start,int before,int count){ 624 super.onTextChanged(s, start, before, count); 625 String postChange = s.toString(); 626 // Prevent calls to setText from invoking onTextChanged (since this will 627 // mean we are on a different textfield). Also prevent the change when 628 // going from a textfield with a string of text to one with a smaller 629 // limit on text length from registering the onTextChanged event. 630 if (mPreChange == null || mPreChange.equals(postChange) || 631 (mMaxLength > -1 && mPreChange.length() > mMaxLength && 632 mPreChange.substring(0, mMaxLength).equals(postChange))) { 633 return; 634 } 635 mPreChange = postChange; 636 if (0 == count) { 637 if (before > 0) { 638 // For this and all changes to the text, update our cache 639 updateCachedTextfield(); 640 if (mGotDelete) { 641 mGotDelete = false; 642 int oldEnd = start + before; 643 if (mDelSelEnd == oldEnd 644 && (mDelSelStart == start 645 || (mDelSelStart == oldEnd && before == 1))) { 646 // If the selection is set up properly before the 647 // delete, send the DOM events. 648 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 649 KeyEvent.KEYCODE_DEL)); 650 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 651 KeyEvent.KEYCODE_DEL)); 652 return; 653 } 654 } 655 // This was simply a delete or a cut, so just delete the 656 // selection. 657 mWebView.deleteSelection(start, start + before); 658 } 659 mGotDelete = false; 660 // before should never be negative, so whether it was a cut 661 // (handled above), or before is 0, in which case nothing has 662 // changed, we should return. 663 return; 664 } 665 // Ensure that this flag gets cleared, since with autocorrect on, a 666 // delete key press may have a more complex result than deleting one 667 // character or the existing selection, so it will not get cleared 668 // above. 669 mGotDelete = false; 670 // Find the last character being replaced. If it can be represented by 671 // events, we will pass them to native (after replacing the beginning 672 // of the changed text), so we can see javascript events. 673 // Otherwise, replace the text being changed (including the last 674 // character) in the textfield. 675 TextUtils.getChars(s, start + count - 1, start + count, mCharacter, 0); 676 KeyCharacterMap kmap = KeyCharacterMap.load(KeyCharacterMap.VIRTUAL_KEYBOARD); 677 KeyEvent[] events = kmap.getEvents(mCharacter); 678 boolean cannotUseKeyEvents = null == events; 679 int charactersFromKeyEvents = cannotUseKeyEvents ? 0 : 1; 680 if (count > 1 || cannotUseKeyEvents) { 681 String replace = s.subSequence(start, 682 start + count - charactersFromKeyEvents).toString(); 683 mWebView.replaceTextfieldText(start, start + before, replace, 684 start + count - charactersFromKeyEvents, 685 start + count - charactersFromKeyEvents); 686 } else { 687 // This corrects the selection which may have been affected by the 688 // trackball or auto-correct. 689 if (DebugFlags.WEB_TEXT_VIEW) { 690 Log.v(LOGTAG, "onTextChanged start=" + start 691 + " start + before=" + (start + before)); 692 } 693 if (!mInSetTextAndKeepSelection) { 694 mWebView.setSelection(start, start + before); 695 } 696 } 697 if (!cannotUseKeyEvents) { 698 int length = events.length; 699 for (int i = 0; i < length; i++) { 700 // We never send modifier keys to native code so don't send them 701 // here either. 702 if (!KeyEvent.isModifierKey(events[i].getKeyCode())) { 703 sendDomEvent(events[i]); 704 } 705 } 706 } 707 updateCachedTextfield(); 708 } 709 710 @Override 711 public boolean onTouchEvent(MotionEvent event) { 712 switch (event.getAction()) { 713 case MotionEvent.ACTION_DOWN: 714 super.onTouchEvent(event); 715 // This event may be the start of a drag, so store it to pass to the 716 // WebView if it is. 717 mDragStartX = event.getX(); 718 mDragStartY = event.getY(); 719 mDragStartTime = event.getEventTime(); 720 mDragSent = false; 721 mScrolled = false; 722 mGotTouchDown = true; 723 mHasPerformedLongClick = false; 724 break; 725 case MotionEvent.ACTION_MOVE: 726 if (mHasPerformedLongClick) { 727 mGotTouchDown = false; 728 return false; 729 } 730 int slop = ViewConfiguration.get(mContext).getScaledTouchSlop(); 731 Spannable buffer = getText(); 732 int initialScrollX = Touch.getInitialScrollX(this, buffer); 733 int initialScrollY = Touch.getInitialScrollY(this, buffer); 734 super.onTouchEvent(event); 735 int dx = Math.abs(mScrollX - initialScrollX); 736 int dy = Math.abs(mScrollY - initialScrollY); 737 // Use a smaller slop when checking to see if we've moved far enough 738 // to scroll the text, because experimentally, slop has shown to be 739 // to big for the case of a small textfield. 740 int smallerSlop = slop/2; 741 if (dx > smallerSlop || dy > smallerSlop) { 742 // Scrolling is handled in onScrollChanged. 743 mScrolled = true; 744 cancelLongPress(); 745 return true; 746 } 747 if (Math.abs((int) event.getX() - mDragStartX) < slop 748 && Math.abs((int) event.getY() - mDragStartY) < slop) { 749 // If the user has not scrolled further than slop, we should not 750 // send the drag. Instead, do nothing, and when the user lifts 751 // their finger, we will change the selection. 752 return true; 753 } 754 if (mWebView != null) { 755 // Only want to set the initial state once. 756 if (!mDragSent) { 757 mWebView.initiateTextFieldDrag(mDragStartX, mDragStartY, 758 mDragStartTime); 759 mDragSent = true; 760 } 761 boolean scrolled = mWebView.textFieldDrag(event); 762 if (scrolled) { 763 mScrolled = true; 764 cancelLongPress(); 765 return true; 766 } 767 } 768 return false; 769 case MotionEvent.ACTION_UP: 770 case MotionEvent.ACTION_CANCEL: 771 super.onTouchEvent(event); 772 if (mHasPerformedLongClick) { 773 mGotTouchDown = false; 774 return false; 775 } 776 if (!mScrolled) { 777 // If the page scrolled, or the TextView scrolled, we do not 778 // want to change the selection 779 cancelLongPress(); 780 if (mGotTouchDown && mWebView != null) { 781 mWebView.touchUpOnTextField(event); 782 } 783 } 784 // Necessary for the WebView to reset its state 785 if (mWebView != null && mDragSent) { 786 mWebView.onTouchEvent(event); 787 } 788 mGotTouchDown = false; 789 break; 790 default: 791 break; 792 } 793 return true; 794 } 795 796 @Override 797 public boolean onTrackballEvent(MotionEvent event) { 798 if (isPopupShowing()) { 799 return super.onTrackballEvent(event); 800 } 801 if (event.getAction() != MotionEvent.ACTION_MOVE) { 802 return false; 803 } 804 Spannable text = getText(); 805 MovementMethod move = getMovementMethod(); 806 if (move != null && getLayout() != null && 807 move.onTrackballEvent(this, text, event)) { 808 // Selection is changed in onSelectionChanged 809 return true; 810 } 811 return false; 812 } 813 814 @Override 815 public boolean performLongClick() { 816 mHasPerformedLongClick = true; 817 return super.performLongClick(); 818 } 819 820 /** 821 * Remove this WebTextView from its host WebView, and return 822 * focus to the host. 823 */ 824 /* package */ void remove() { 825 // hide the soft keyboard when the edit text is out of focus 826 InputMethodManager imm = InputMethodManager.getInstance(mContext); 827 if (imm.isActive(this)) { 828 imm.hideSoftInputFromWindow(getWindowToken(), 0); 829 } 830 mInsideRemove = true; 831 mWebView.removeView(this); 832 mWebView.requestFocus(); 833 mInsideRemove = false; 834 } 835 836 @Override 837 public boolean requestRectangleOnScreen(Rect rectangle, boolean immediate) { 838 // Do nothing, since webkit will put the textfield on screen. 839 return true; 840 } 841 842 /** 843 * Send the DOM events for the specified event. 844 * @param event KeyEvent to be translated into a DOM event. 845 */ 846 private void sendDomEvent(KeyEvent event) { 847 mWebView.passToJavaScript(getText().toString(), event); 848 } 849 850 /** 851 * Always use this instead of setAdapter, as this has features specific to 852 * the WebTextView. 853 */ 854 public void setAdapterCustom(AutoCompleteAdapter adapter) { 855 if (adapter != null) { 856 setInputType(getInputType() 857 | EditorInfo.TYPE_TEXT_FLAG_AUTO_COMPLETE); 858 adapter.setTextView(this); 859 if (mAutoFillable) { 860 setOnItemClickListener(this); 861 } else { 862 setOnItemClickListener(null); 863 } 864 showDropDown(); 865 } else { 866 dismissDropDown(); 867 } 868 super.setAdapter(adapter); 869 } 870 871 /** 872 * This is a special version of ArrayAdapter which changes its text size 873 * to match the text size of its host TextView. 874 */ 875 public static class AutoCompleteAdapter extends ArrayAdapter<String> { 876 private TextView mTextView; 877 878 public AutoCompleteAdapter(Context context, ArrayList<String> entries) { 879 super(context, com.android.internal.R.layout 880 .web_text_view_dropdown, entries); 881 } 882 883 /** 884 * {@inheritDoc} 885 */ 886 @Override 887 public View getView(int position, View convertView, ViewGroup parent) { 888 TextView tv = 889 (TextView) super.getView(position, convertView, parent); 890 if (tv != null && mTextView != null) { 891 tv.setTextSize(mTextView.getTextSize()); 892 } 893 return tv; 894 } 895 896 /** 897 * Set the TextView so we can match its text size. 898 */ 899 private void setTextView(TextView tv) { 900 mTextView = tv; 901 } 902 } 903 904 /** 905 * Sets the selection when the user clicks on a textfield or textarea with 906 * the trackball or center key, or starts typing into it without clicking on 907 * it. 908 */ 909 /* package */ void setDefaultSelection() { 910 Spannable text = (Spannable) getText(); 911 int selection = mSingle ? text.length() : 0; 912 if (Selection.getSelectionStart(text) == selection 913 && Selection.getSelectionEnd(text) == selection) { 914 // The selection of the UI copy is set correctly, but the 915 // WebTextView still needs to inform the webkit thread to set the 916 // selection. Normally that is done in onSelectionChanged, but 917 // onSelectionChanged will not be called because the UI copy is not 918 // changing. (This can happen when the WebTextView takes focus. 919 // That onSelectionChanged was blocked because the selection set 920 // when focusing is not necessarily the desirable selection for 921 // WebTextView.) 922 if (mWebView != null) { 923 mWebView.setSelection(selection, selection); 924 } 925 } else { 926 Selection.setSelection(text, selection, selection); 927 } 928 if (mWebView != null) mWebView.incrementTextGeneration(); 929 } 930 931 /** 932 * Determine whether to use the system-wide password disguising method, 933 * or to use none. 934 * @param inPassword True if the textfield is a password field. 935 */ 936 /* package */ void setInPassword(boolean inPassword) { 937 if (inPassword) { 938 setInputType(EditorInfo.TYPE_CLASS_TEXT | EditorInfo. 939 TYPE_TEXT_VARIATION_WEB_PASSWORD); 940 createBackground(); 941 } 942 // For password fields, draw the WebTextView. For others, just show 943 // webkit's drawing. 944 if (!DebugFlags.DRAW_WEBTEXTVIEW) { 945 setWillNotDraw(!inPassword); 946 } 947 setBackgroundDrawable(inPassword ? mBackground : null); 948 } 949 950 /** 951 * Private class used for the background of a password textfield. 952 */ 953 private static class OutlineDrawable extends Drawable { 954 private Paint mBackgroundPaint; 955 private Paint mOutlinePaint; 956 private float[] mLines; 957 public OutlineDrawable() { 958 mBackgroundPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 959 mBackgroundPaint.setColor(Color.WHITE); 960 961 mOutlinePaint = new Paint(Paint.ANTI_ALIAS_FLAG); 962 mOutlinePaint.setColor(Color.BLACK); 963 mOutlinePaint.setStyle(Paint.Style.STROKE); 964 965 mLines = new float[16]; 966 } 967 @Override 968 public void setBounds(int left, int top, int right, int bottom) { 969 super.setBounds(left, top, right, bottom); 970 bottom--; 971 right -= 2; 972 // Top line 973 mLines[0] = left; 974 mLines[1] = top + 1; 975 mLines[2] = right; 976 mLines[3] = top + 1; 977 // Right line 978 mLines[4] = right; 979 mLines[5] = top; 980 mLines[6] = right; 981 mLines[7] = bottom; 982 // Bottom line 983 mLines[8] = left; 984 mLines[9] = bottom; 985 mLines[10] = right; 986 mLines[11] = bottom; 987 // Left line 988 mLines[12] = left + 1; 989 mLines[13] = top; 990 mLines[14] = left + 1; 991 mLines[15] = bottom; 992 } 993 @Override 994 public void draw(Canvas canvas) { 995 // Draw the background. 996 canvas.drawRect(getBounds(), mBackgroundPaint); 997 // Draw the outline. 998 canvas.drawLines(mLines, mOutlinePaint); 999 } 1000 // Always want it to be opaque. 1001 @Override 1002 public int getOpacity() { 1003 return PixelFormat.OPAQUE; 1004 } 1005 // These are needed because they are abstract in Drawable. 1006 @Override 1007 public void setAlpha(int alpha) { } 1008 @Override 1009 public void setColorFilter(ColorFilter cf) { } 1010 } 1011 1012 /** 1013 * Create a background for the WebTextView and set up the paint for drawing 1014 * the text. This way, we can see the password transformation of the 1015 * system, which (optionally) shows the actual text before changing to dots. 1016 * The background is necessary to hide the webkit-drawn text beneath. 1017 */ 1018 private void createBackground() { 1019 if (mBackground != null) { 1020 return; 1021 } 1022 mBackground = new OutlineDrawable(); 1023 1024 setGravity(Gravity.CENTER_VERTICAL); 1025 } 1026 1027 @Override 1028 public void setInputType(int type) { 1029 mFromSetInputType = true; 1030 super.setInputType(type); 1031 mFromSetInputType = false; 1032 } 1033 1034 private void setMaxLength(int maxLength) { 1035 mMaxLength = maxLength; 1036 if (-1 == maxLength) { 1037 setFilters(NO_FILTERS); 1038 } else { 1039 setFilters(new InputFilter[] { 1040 new InputFilter.LengthFilter(maxLength) }); 1041 } 1042 } 1043 1044 /** 1045 * Set the pointer for this node so it can be determined which node this 1046 * WebTextView represents. 1047 * @param ptr Integer representing the pointer to the node which this 1048 * WebTextView represents. 1049 */ 1050 /* package */ void setNodePointer(int ptr) { 1051 mNodePointer = ptr; 1052 } 1053 1054 /** 1055 * Determine the position and size of WebTextView, and add it to the 1056 * WebView's view heirarchy. All parameters are presumed to be in 1057 * view coordinates. Also requests Focus and sets the cursor to not 1058 * request to be in view. 1059 * @param x x-position of the textfield. 1060 * @param y y-position of the textfield. 1061 * @param width width of the textfield. 1062 * @param height height of the textfield. 1063 */ 1064 /* package */ void setRect(int x, int y, int width, int height) { 1065 LayoutParams lp = (LayoutParams) getLayoutParams(); 1066 if (null == lp) { 1067 lp = new LayoutParams(width, height, x, y); 1068 } else { 1069 lp.x = x; 1070 lp.y = y; 1071 lp.width = width; 1072 lp.height = height; 1073 } 1074 if (getParent() == null) { 1075 mWebView.addView(this, lp); 1076 } else { 1077 setLayoutParams(lp); 1078 } 1079 // Set up a measure spec so a layout can always be recreated. 1080 mWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY); 1081 mHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY); 1082 } 1083 1084 /** 1085 * Set the selection, and disable our onSelectionChanged action. 1086 */ 1087 /* package */ void setSelectionFromWebKit(int start, int end) { 1088 if (start < 0 || end < 0) return; 1089 Spannable text = (Spannable) getText(); 1090 int length = text.length(); 1091 if (start > length || end > length) return; 1092 mFromWebKit = true; 1093 Selection.setSelection(text, start, end); 1094 mFromWebKit = false; 1095 } 1096 1097 /** 1098 * Update the text size according to the size of the focus candidate's text 1099 * size in mWebView. Should only be called from mWebView. 1100 */ 1101 /* package */ void updateTextSize() { 1102 Assert.assertNotNull("updateTextSize should only be called from " 1103 + "mWebView, so mWebView should never be null!", mWebView); 1104 // Note that this is approximately WebView.contentToViewDimension, 1105 // without being rounded. 1106 float size = mWebView.nativeFocusCandidateTextSize() 1107 * mWebView.getScale(); 1108 setTextSize(TypedValue.COMPLEX_UNIT_PX, size); 1109 } 1110 1111 /** 1112 * Set the text to the new string, but use the old selection, making sure 1113 * to keep it within the new string. 1114 * @param text The new text to place in the textfield. 1115 */ 1116 /* package */ void setTextAndKeepSelection(String text) { 1117 mPreChange = text.toString(); 1118 Editable edit = getText(); 1119 int selStart = Selection.getSelectionStart(edit); 1120 int selEnd = Selection.getSelectionEnd(edit); 1121 mInSetTextAndKeepSelection = true; 1122 edit.replace(0, edit.length(), text); 1123 int newLength = edit.length(); 1124 if (selStart > newLength) selStart = newLength; 1125 if (selEnd > newLength) selEnd = newLength; 1126 Selection.setSelection(edit, selStart, selEnd); 1127 mInSetTextAndKeepSelection = false; 1128 InputMethodManager imm = InputMethodManager.peekInstance(); 1129 if (imm != null && imm.isActive(this)) { 1130 // Since the text has changed, do not allow the IME to replace the 1131 // existing text as though it were a completion. 1132 imm.restartInput(this); 1133 } 1134 updateCachedTextfield(); 1135 } 1136 1137 /** 1138 * Called by WebView.rebuildWebTextView(). Based on the type of the <input> 1139 * element, set up the WebTextView, its InputType, and IME Options properly. 1140 * @param type int corresponding to enum "Type" defined in CachedInput.h. 1141 * Does not correspond to HTMLInputElement::InputType so this 1142 * is unaffected if that changes, and also because that has no 1143 * type corresponding to textarea (which is its own tag). 1144 */ 1145 /* package */ void setType(int type) { 1146 if (mWebView == null) return; 1147 boolean single = true; 1148 boolean inPassword = false; 1149 int maxLength = -1; 1150 int inputType = EditorInfo.TYPE_CLASS_TEXT 1151 | EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT; 1152 int imeOptions = EditorInfo.IME_FLAG_NO_EXTRACT_UI 1153 | EditorInfo.IME_FLAG_NO_FULLSCREEN; 1154 if (TEXT_AREA != type 1155 && mWebView.nativeFocusCandidateHasNextTextfield()) { 1156 imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT; 1157 } 1158 switch (type) { 1159 case NORMAL_TEXT_FIELD: 1160 imeOptions |= EditorInfo.IME_ACTION_GO; 1161 break; 1162 case TEXT_AREA: 1163 single = false; 1164 inputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE 1165 | EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES 1166 | EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT; 1167 imeOptions |= EditorInfo.IME_ACTION_NONE; 1168 break; 1169 case PASSWORD: 1170 inPassword = true; 1171 imeOptions |= EditorInfo.IME_ACTION_GO; 1172 break; 1173 case SEARCH: 1174 imeOptions |= EditorInfo.IME_ACTION_SEARCH; 1175 break; 1176 case EMAIL: 1177 inputType = EditorInfo.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS; 1178 imeOptions |= EditorInfo.IME_ACTION_GO; 1179 break; 1180 case NUMBER: 1181 inputType |= EditorInfo.TYPE_CLASS_NUMBER; 1182 // Number and telephone do not have both a Tab key and an 1183 // action, so set the action to NEXT 1184 imeOptions |= EditorInfo.IME_ACTION_NEXT; 1185 break; 1186 case TELEPHONE: 1187 inputType |= EditorInfo.TYPE_CLASS_PHONE; 1188 imeOptions |= EditorInfo.IME_ACTION_NEXT; 1189 break; 1190 case URL: 1191 // TYPE_TEXT_VARIATION_URI prevents Tab key from showing, so 1192 // exclude it for now. 1193 imeOptions |= EditorInfo.IME_ACTION_GO; 1194 break; 1195 default: 1196 imeOptions |= EditorInfo.IME_ACTION_GO; 1197 break; 1198 } 1199 setHint(null); 1200 if (single) { 1201 mWebView.requestLabel(mWebView.nativeFocusCandidateFramePointer(), 1202 mNodePointer); 1203 maxLength = mWebView.nativeFocusCandidateMaxLength(); 1204 boolean autoComplete = mWebView.nativeFocusCandidateIsAutoComplete(); 1205 if (type != PASSWORD && (mAutoFillable || autoComplete)) { 1206 String name = mWebView.nativeFocusCandidateName(); 1207 if (name != null && name.length() > 0) { 1208 mWebView.requestFormData(name, mNodePointer, mAutoFillable, 1209 autoComplete); 1210 } 1211 } 1212 } 1213 mSingle = single; 1214 setMaxLength(maxLength); 1215 setHorizontallyScrolling(single); 1216 setInputType(inputType); 1217 setImeOptions(imeOptions); 1218 setInPassword(inPassword); 1219 AutoCompleteAdapter adapter = null; 1220 setAdapterCustom(adapter); 1221 } 1222 1223 /** 1224 * Update the cache to reflect the current text. 1225 */ 1226 /* package */ void updateCachedTextfield() { 1227 mWebView.updateCachedTextfield(getText().toString()); 1228 } 1229 1230 /* package */ void setAutoFillProfileIsSet(boolean autoFillProfileIsSet) { 1231 mAutoFillProfileIsSet = autoFillProfileIsSet; 1232 } 1233} 1234