WebTextView.java revision 60344deb7cc3de88b2f2da1f58d93b86e5ed2eab
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 72 static final String LOGTAG = "webtextview"; 73 74 private WebView mWebView; 75 private boolean mSingle; 76 private int mWidthSpec; 77 private int mHeightSpec; 78 private int mNodePointer; 79 // FIXME: This is a hack for blocking unmatched key ups, in particular 80 // on the enter key. The method for blocking unmatched key ups prevents 81 // the shift key from working properly. 82 private boolean mGotEnterDown; 83 private int mMaxLength; 84 // Keep track of the text before the change so we know whether we actually 85 // need to send down the DOM events. 86 private String mPreChange; 87 private Drawable mBackground; 88 // Variables for keeping track of the touch down, to send to the WebView 89 // when a drag starts 90 private float mDragStartX; 91 private float mDragStartY; 92 private long mDragStartTime; 93 private boolean mDragSent; 94 // True if the most recent drag event has caused either the TextView to 95 // scroll or the web page to scroll. Gets reset after a touch down. 96 private boolean mScrolled; 97 // Whether or not a selection change was generated from webkit. If it was, 98 // we do not need to pass the selection back to webkit. 99 private boolean mFromWebKit; 100 // Whether or not a selection change was generated from the WebTextView 101 // gaining focus. If it is, we do not want to pass it to webkit. This 102 // selection comes from the MovementMethod, but we behave differently. If 103 // WebTextView gained focus from a touch, webkit will determine the 104 // selection. 105 private boolean mFromFocusChange; 106 // Whether or not a selection change was generated from setInputType. We 107 // do not want to pass this change to webkit. 108 private boolean mFromSetInputType; 109 private boolean mGotTouchDown; 110 // Keep track of whether a long press has happened. Only meaningful after 111 // an ACTION_DOWN MotionEvent 112 private boolean mHasPerformedLongClick; 113 private boolean mInSetTextAndKeepSelection; 114 // Array to store the final character added in onTextChanged, so that its 115 // KeyEvents may be determined. 116 private char[] mCharacter = new char[1]; 117 // This is used to reset the length filter when on a textfield 118 // with no max length. 119 // FIXME: This can be replaced with TextView.NO_FILTERS if that 120 // is made public/protected. 121 private static final InputFilter[] NO_FILTERS = new InputFilter[0]; 122 // For keeping track of the fact that the delete key was pressed, so 123 // we can simply pass a delete key instead of calling deleteSelection. 124 private boolean mGotDelete; 125 private int mDelSelStart; 126 private int mDelSelEnd; 127 128 // Keep in sync with native constant in 129 // external/webkit/WebKit/android/WebCoreSupport/autofill/WebAutoFill.cpp 130 /* package */ static final int FORM_NOT_AUTOFILLABLE = -1; 131 132 private boolean mAutoFillable; // Is this textview part of an autofillable form? 133 private int mQueryId; 134 private boolean mAutoFillProfileIsSet; 135 136 // Types used with setType. Keep in sync with CachedInput.h 137 private static final int NORMAL_TEXT_FIELD = 0; 138 private static final int TEXT_AREA = 1; 139 private static final int PASSWORD = 2; 140 private static final int SEARCH = 3; 141 private static final int EMAIL = 4; 142 private static final int NUMBER = 5; 143 private static final int TELEPHONE = 6; 144 private static final int URL = 7; 145 146 private static final int AUTOFILL_FORM = 100; 147 private Handler mHandler; 148 149 /** 150 * Create a new WebTextView. 151 * @param context The Context for this WebTextView. 152 * @param webView The WebView that created this. 153 */ 154 /* package */ WebTextView(Context context, WebView webView, int autoFillQueryId) { 155 super(context, null, com.android.internal.R.attr.webTextViewStyle); 156 mWebView = webView; 157 mMaxLength = -1; 158 setAutoFillable(autoFillQueryId); 159 // Turn on subpixel text, and turn off kerning, so it better matches 160 // the text in webkit. 161 TextPaint paint = getPaint(); 162 int flags = paint.getFlags() & ~Paint.DEV_KERN_TEXT_FLAG 163 | Paint.SUBPIXEL_TEXT_FLAG | Paint.DITHER_FLAG; 164 paint.setFlags(flags); 165 166 // Set the text color to black, regardless of the theme. This ensures 167 // that other applications that use embedded WebViews will properly 168 // display the text in password textfields. 169 setTextColor(DebugFlags.DRAW_WEBTEXTVIEW ? Color.RED : Color.BLACK); 170 // This helps to align the text better with the text in the web page. 171 setIncludeFontPadding(false); 172 173 mHandler = new Handler() { 174 @Override 175 public void handleMessage(Message msg) { 176 switch (msg.what) { 177 case AUTOFILL_FORM: 178 mWebView.autoFillForm(mQueryId); 179 break; 180 } 181 } 182 }; 183 184 } 185 186 public void setAutoFillable(int queryId) { 187 mAutoFillable = mWebView.getSettings().getAutoFillEnabled() 188 && (queryId != FORM_NOT_AUTOFILLABLE); 189 mQueryId = queryId; 190 } 191 192 @Override 193 public boolean dispatchKeyEvent(KeyEvent event) { 194 if (event.isSystem()) { 195 return super.dispatchKeyEvent(event); 196 } 197 // Treat ACTION_DOWN and ACTION MULTIPLE the same 198 boolean down = event.getAction() != KeyEvent.ACTION_UP; 199 int keyCode = event.getKeyCode(); 200 201 boolean isArrowKey = false; 202 switch(keyCode) { 203 case KeyEvent.KEYCODE_DPAD_LEFT: 204 case KeyEvent.KEYCODE_DPAD_RIGHT: 205 case KeyEvent.KEYCODE_DPAD_UP: 206 case KeyEvent.KEYCODE_DPAD_DOWN: 207 if (!mWebView.nativeCursorMatchesFocus()) { 208 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 209 .onKeyUp(keyCode, event); 210 211 } 212 isArrowKey = true; 213 break; 214 } 215 216 if (KeyEvent.KEYCODE_TAB == keyCode) { 217 if (down) { 218 onEditorAction(EditorInfo.IME_ACTION_NEXT); 219 } 220 return true; 221 } 222 Spannable text = (Spannable) getText(); 223 int oldStart = Selection.getSelectionStart(text); 224 int oldEnd = Selection.getSelectionEnd(text); 225 // Normally the delete key's dom events are sent via onTextChanged. 226 // However, if the cursor is at the beginning of the field, which 227 // includes the case where it has zero length, then the text is not 228 // changed, so send the events immediately. 229 if (KeyEvent.KEYCODE_DEL == keyCode) { 230 if (oldStart == 0 && oldEnd == 0) { 231 sendDomEvent(event); 232 return true; 233 } 234 if (down) { 235 mGotDelete = true; 236 mDelSelStart = oldStart; 237 mDelSelEnd = oldEnd; 238 } 239 } 240 241 if ((mSingle && KeyEvent.KEYCODE_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 if (!mWebView.nativeCursorMatchesFocus()) { 261 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 262 .onKeyUp(keyCode, event); 263 } 264 // Center key should be passed to a potential onClick 265 if (!down) { 266 mWebView.centerKeyPressOnTextField(); 267 } 268 // Pass to super to handle longpress. 269 return super.dispatchKeyEvent(event); 270 } 271 272 // Ensure there is a layout so arrow keys are handled properly. 273 if (getLayout() == null) { 274 measure(mWidthSpec, mHeightSpec); 275 } 276 277 int oldLength = text.length(); 278 boolean maxedOut = mMaxLength != -1 && oldLength == mMaxLength; 279 // If we are at max length, and there is a selection rather than a 280 // cursor, we need to store the text to compare later, since the key 281 // may have changed the string. 282 String oldText; 283 if (maxedOut && oldEnd != oldStart) { 284 oldText = text.toString(); 285 } else { 286 oldText = ""; 287 } 288 if (super.dispatchKeyEvent(event)) { 289 // If the WebTextView handled the key it was either an alphanumeric 290 // key, a delete, or a movement within the text. All of those are 291 // ok to pass to javascript. 292 293 // UNLESS there is a max length determined by the html. In that 294 // case, if the string was already at the max length, an 295 // alphanumeric key will be erased by the LengthFilter, 296 // so do not pass down to javascript, and instead 297 // return true. If it is an arrow key or a delete key, we can go 298 // ahead and pass it down. 299 if (KeyEvent.KEYCODE_ENTER == keyCode) { 300 // For multi-line text boxes, newlines will 301 // trigger onTextChanged for key down (which will send both 302 // key up and key down) but not key up. 303 mGotEnterDown = true; 304 } 305 if (maxedOut && !isArrowKey && keyCode != KeyEvent.KEYCODE_DEL) { 306 if (oldEnd == oldStart) { 307 // Return true so the key gets dropped. 308 return true; 309 } else if (!oldText.equals(getText().toString())) { 310 // FIXME: This makes the text work properly, but it 311 // does not pass down the key event, so it may not 312 // work for a textfield that has the type of 313 // behavior of GoogleSuggest. That said, it is 314 // unlikely that a site would combine the two in 315 // one textfield. 316 Spannable span = (Spannable) getText(); 317 int newStart = Selection.getSelectionStart(span); 318 int newEnd = Selection.getSelectionEnd(span); 319 mWebView.replaceTextfieldText(0, oldLength, span.toString(), 320 newStart, newEnd); 321 return true; 322 } 323 } 324 /* FIXME: 325 * In theory, we would like to send the events for the arrow keys. 326 * However, the TextView can arbitrarily change the selection (i.e. 327 * long press followed by using the trackball). Therefore, we keep 328 * in sync with the TextView via onSelectionChanged. If we also 329 * send the DOM event, we lose the correct selection. 330 if (isArrowKey) { 331 // Arrow key does not change the text, but we still want to send 332 // the DOM events. 333 sendDomEvent(event); 334 } 335 */ 336 return true; 337 } 338 // Ignore the key up event for newlines. This prevents 339 // multiple newlines in the native textarea. 340 if (mGotEnterDown && !down) { 341 return true; 342 } 343 // if it is a navigation key, pass it to WebView 344 if (isArrowKey) { 345 // WebView check the trackballtime in onKeyDown to avoid calling 346 // native from both trackball and key handling. As this is called 347 // from WebTextView, we always want WebView to check with native. 348 // Reset trackballtime to ensure it. 349 mWebView.resetTrackballTime(); 350 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 351 .onKeyUp(keyCode, event); 352 } 353 return false; 354 } 355 356 /** 357 * Determine whether this WebTextView currently represents the node 358 * represented by ptr. 359 * @param ptr Pointer to a node to compare to. 360 * @return boolean Whether this WebTextView already represents the node 361 * pointed to by ptr. 362 */ 363 /* package */ boolean isSameTextField(int ptr) { 364 return ptr == mNodePointer; 365 } 366 367 /** 368 * Ensure that the underlying textfield is lined up with the WebTextView. 369 */ 370 private void lineUpScroll() { 371 Layout layout = getLayout(); 372 if (mWebView != null && layout != null) { 373 float maxScrollX = Touch.getMaxScrollX(this, layout, mScrollY); 374 if (DebugFlags.WEB_TEXT_VIEW) { 375 Log.v(LOGTAG, "onTouchEvent x=" + mScrollX + " y=" 376 + mScrollY + " maxX=" + maxScrollX); 377 } 378 mWebView.scrollFocusedTextInput(maxScrollX > 0 ? 379 mScrollX / maxScrollX : 0, mScrollY); 380 } 381 } 382 383 @Override 384 protected void makeNewLayout(int w, int hintWidth, Metrics boring, 385 Metrics hintBoring, int ellipsisWidth, boolean bringIntoView) { 386 // Necessary to get a Layout to work with, and to do the other work that 387 // makeNewLayout does. 388 super.makeNewLayout(w, hintWidth, boring, hintBoring, ellipsisWidth, 389 bringIntoView); 390 391 // For fields that do not draw, create a layout which is altered so that 392 // the text lines up. 393 if (DebugFlags.DRAW_WEBTEXTVIEW || willNotDraw()) { 394 float lineHeight = -1; 395 if (mWebView != null) { 396 float height = mWebView.nativeFocusCandidateLineHeight(); 397 if (height != -1) { 398 lineHeight = height * mWebView.getScale(); 399 } 400 } 401 CharSequence text = getText(); 402 // Copy from the existing Layout. 403 mLayout = new WebTextViewLayout(text, text, getPaint(), w, 404 mLayout.getAlignment(), mLayout.getSpacingMultiplier(), 405 mLayout.getSpacingAdd(), false, null, ellipsisWidth, 406 lineHeight); 407 } 408 } 409 410 /** 411 * Custom layout which figures out its line spacing. If -1 is passed in for 412 * the height, it will use the ascent and descent from the paint to 413 * determine the line spacing. Otherwise it will use the spacing provided. 414 */ 415 private static class WebTextViewLayout extends DynamicLayout { 416 private float mLineHeight; 417 private float mDifference; 418 public WebTextViewLayout(CharSequence base, CharSequence display, 419 TextPaint paint, 420 int width, Alignment align, 421 float spacingMult, float spacingAdd, 422 boolean includepad, 423 TextUtils.TruncateAt ellipsize, int ellipsizedWidth, 424 float lineHeight) { 425 super(base, display, paint, width, align, spacingMult, spacingAdd, 426 includepad, ellipsize, ellipsizedWidth); 427 float paintLineHeight = paint.descent() - paint.ascent(); 428 if (lineHeight == -1f) { 429 mLineHeight = paintLineHeight; 430 mDifference = 0f; 431 } else { 432 mLineHeight = lineHeight; 433 // Through trial and error, I found this calculation to improve 434 // the accuracy of line placement. 435 mDifference = (lineHeight - paintLineHeight) / 2; 436 } 437 } 438 439 @Override 440 public int getLineTop(int line) { 441 return Math.round(mLineHeight * line - mDifference); 442 } 443 } 444 445 @Override public InputConnection onCreateInputConnection( 446 EditorInfo outAttrs) { 447 InputConnection connection = super.onCreateInputConnection(outAttrs); 448 if (mWebView != null) { 449 // Use the name of the textfield + the url. Use backslash as an 450 // arbitrary separator. 451 outAttrs.fieldName = mWebView.nativeFocusCandidateName() + "\\" 452 + mWebView.getUrl(); 453 } 454 return connection; 455 } 456 457 /** 458 * In general, TextView makes a call to InputMethodManager.updateSelection 459 * in onDraw. However, in the general case of WebTextView, we do not draw. 460 * This method is called by WebView.onDraw to take care of the part that 461 * needs to be called. 462 */ 463 /* package */ void onDrawSubstitute() { 464 if (!willNotDraw()) { 465 // If the WebTextView is set to draw, such as in the case of a 466 // password, onDraw calls updateSelection(), so this code path is 467 // unnecessary. 468 return; 469 } 470 // This code is copied from TextView.onDraw(). That code does not get 471 // executed, however, because the WebTextView does not draw, allowing 472 // webkit's drawing to show through. 473 InputMethodManager imm = InputMethodManager.peekInstance(); 474 if (imm != null && imm.isActive(this)) { 475 Spannable sp = (Spannable) getText(); 476 int selStart = Selection.getSelectionStart(sp); 477 int selEnd = Selection.getSelectionEnd(sp); 478 int candStart = EditableInputConnection.getComposingSpanStart(sp); 479 int candEnd = EditableInputConnection.getComposingSpanEnd(sp); 480 imm.updateSelection(this, selStart, selEnd, candStart, candEnd); 481 } 482 updateCursorControllerPositions(); 483 } 484 485 @Override 486 protected void onDraw(Canvas canvas) { 487 // onDraw should only be called for password fields. If WebTextView is 488 // still drawing, but is no longer corresponding to a password field, 489 // remove it. 490 if (!DebugFlags.DRAW_WEBTEXTVIEW && (mWebView == null 491 || !mWebView.nativeFocusCandidateIsPassword() 492 || !isSameTextField(mWebView.nativeFocusCandidatePointer()))) { 493 // Although calling remove() would seem to make more sense here, 494 // changing it to not be a password field will make it not draw. 495 // Other code will make sure that it is removed completely, but this 496 // way the user will not see it. 497 setInPassword(false); 498 } else { 499 super.onDraw(canvas); 500 } 501 } 502 503 @Override 504 public void onEditorAction(int actionCode) { 505 switch (actionCode) { 506 case EditorInfo.IME_ACTION_NEXT: 507 if (mWebView.nativeMoveCursorToNextTextInput()) { 508 // Preemptively rebuild the WebTextView, so that the action will 509 // be set properly. 510 mWebView.rebuildWebTextView(); 511 setDefaultSelection(); 512 mWebView.invalidate(); 513 } 514 break; 515 case EditorInfo.IME_ACTION_DONE: 516 super.onEditorAction(actionCode); 517 break; 518 case EditorInfo.IME_ACTION_GO: 519 case EditorInfo.IME_ACTION_SEARCH: 520 // Send an enter and hide the soft keyboard 521 InputMethodManager.getInstance(mContext) 522 .hideSoftInputFromWindow(getWindowToken(), 0); 523 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 524 KeyEvent.KEYCODE_ENTER)); 525 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 526 KeyEvent.KEYCODE_ENTER)); 527 528 default: 529 break; 530 } 531 } 532 533 @Override 534 protected void onFocusChanged(boolean focused, int direction, 535 Rect previouslyFocusedRect) { 536 mFromFocusChange = true; 537 super.onFocusChanged(focused, direction, previouslyFocusedRect); 538 mFromFocusChange = false; 539 } 540 541 @Override 542 protected void onScrollChanged(int l, int t, int oldl, int oldt) { 543 super.onScrollChanged(l, t, oldl, oldt); 544 lineUpScroll(); 545 } 546 547 @Override 548 protected void onSelectionChanged(int selStart, int selEnd) { 549 if (!mFromWebKit && !mFromFocusChange && !mFromSetInputType 550 && mWebView != null && !mInSetTextAndKeepSelection) { 551 if (DebugFlags.WEB_TEXT_VIEW) { 552 Log.v(LOGTAG, "onSelectionChanged selStart=" + selStart 553 + " selEnd=" + selEnd); 554 } 555 mWebView.setSelection(selStart, selEnd); 556 lineUpScroll(); 557 } 558 } 559 560 @Override 561 protected void onTextChanged(CharSequence s,int start,int before,int count){ 562 super.onTextChanged(s, start, before, count); 563 String postChange = s.toString(); 564 // Prevent calls to setText from invoking onTextChanged (since this will 565 // mean we are on a different textfield). Also prevent the change when 566 // going from a textfield with a string of text to one with a smaller 567 // limit on text length from registering the onTextChanged event. 568 if (mPreChange == null || mPreChange.equals(postChange) || 569 (mMaxLength > -1 && mPreChange.length() > mMaxLength && 570 mPreChange.substring(0, mMaxLength).equals(postChange))) { 571 return; 572 } 573 mPreChange = postChange; 574 if (0 == count) { 575 if (before > 0) { 576 // For this and all changes to the text, update our cache 577 updateCachedTextfield(); 578 if (mGotDelete) { 579 mGotDelete = false; 580 int oldEnd = start + before; 581 if (mDelSelEnd == oldEnd 582 && (mDelSelStart == start 583 || (mDelSelStart == oldEnd && before == 1))) { 584 // If the selection is set up properly before the 585 // delete, send the DOM events. 586 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 587 KeyEvent.KEYCODE_DEL)); 588 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 589 KeyEvent.KEYCODE_DEL)); 590 return; 591 } 592 } 593 // This was simply a delete or a cut, so just delete the 594 // selection. 595 mWebView.deleteSelection(start, start + before); 596 } 597 mGotDelete = false; 598 // before should never be negative, so whether it was a cut 599 // (handled above), or before is 0, in which case nothing has 600 // changed, we should return. 601 return; 602 } 603 // Ensure that this flag gets cleared, since with autocorrect on, a 604 // delete key press may have a more complex result than deleting one 605 // character or the existing selection, so it will not get cleared 606 // above. 607 mGotDelete = false; 608 // Find the last character being replaced. If it can be represented by 609 // events, we will pass them to native (after replacing the beginning 610 // of the changed text), so we can see javascript events. 611 // Otherwise, replace the text being changed (including the last 612 // character) in the textfield. 613 TextUtils.getChars(s, start + count - 1, start + count, mCharacter, 0); 614 KeyCharacterMap kmap = KeyCharacterMap.load(KeyCharacterMap.VIRTUAL_KEYBOARD); 615 KeyEvent[] events = kmap.getEvents(mCharacter); 616 boolean cannotUseKeyEvents = null == events; 617 int charactersFromKeyEvents = cannotUseKeyEvents ? 0 : 1; 618 if (count > 1 || cannotUseKeyEvents) { 619 String replace = s.subSequence(start, 620 start + count - charactersFromKeyEvents).toString(); 621 mWebView.replaceTextfieldText(start, start + before, replace, 622 start + count - charactersFromKeyEvents, 623 start + count - charactersFromKeyEvents); 624 } else { 625 // This corrects the selection which may have been affected by the 626 // trackball or auto-correct. 627 if (DebugFlags.WEB_TEXT_VIEW) { 628 Log.v(LOGTAG, "onTextChanged start=" + start 629 + " start + before=" + (start + before)); 630 } 631 if (!mInSetTextAndKeepSelection) { 632 mWebView.setSelection(start, start + before); 633 } 634 } 635 if (!cannotUseKeyEvents) { 636 int length = events.length; 637 for (int i = 0; i < length; i++) { 638 // We never send modifier keys to native code so don't send them 639 // here either. 640 if (!KeyEvent.isModifierKey(events[i].getKeyCode())) { 641 sendDomEvent(events[i]); 642 } 643 } 644 } 645 updateCachedTextfield(); 646 } 647 648 @Override 649 public boolean onTouchEvent(MotionEvent event) { 650 switch (event.getAction()) { 651 case MotionEvent.ACTION_DOWN: 652 super.onTouchEvent(event); 653 // This event may be the start of a drag, so store it to pass to the 654 // WebView if it is. 655 mDragStartX = event.getX(); 656 mDragStartY = event.getY(); 657 mDragStartTime = event.getEventTime(); 658 mDragSent = false; 659 mScrolled = false; 660 mGotTouchDown = true; 661 mHasPerformedLongClick = false; 662 break; 663 case MotionEvent.ACTION_MOVE: 664 if (mHasPerformedLongClick) { 665 mGotTouchDown = false; 666 return false; 667 } 668 int slop = ViewConfiguration.get(mContext).getScaledTouchSlop(); 669 Spannable buffer = getText(); 670 int initialScrollX = Touch.getInitialScrollX(this, buffer); 671 int initialScrollY = Touch.getInitialScrollY(this, buffer); 672 super.onTouchEvent(event); 673 int dx = Math.abs(mScrollX - initialScrollX); 674 int dy = Math.abs(mScrollY - initialScrollY); 675 // Use a smaller slop when checking to see if we've moved far enough 676 // to scroll the text, because experimentally, slop has shown to be 677 // to big for the case of a small textfield. 678 int smallerSlop = slop/2; 679 if (dx > smallerSlop || dy > smallerSlop) { 680 // Scrolling is handled in onScrollChanged. 681 mScrolled = true; 682 cancelLongPress(); 683 return true; 684 } 685 if (Math.abs((int) event.getX() - mDragStartX) < slop 686 && Math.abs((int) event.getY() - mDragStartY) < slop) { 687 // If the user has not scrolled further than slop, we should not 688 // send the drag. Instead, do nothing, and when the user lifts 689 // their finger, we will change the selection. 690 return true; 691 } 692 if (mWebView != null) { 693 // Only want to set the initial state once. 694 if (!mDragSent) { 695 mWebView.initiateTextFieldDrag(mDragStartX, mDragStartY, 696 mDragStartTime); 697 mDragSent = true; 698 } 699 boolean scrolled = mWebView.textFieldDrag(event); 700 if (scrolled) { 701 mScrolled = true; 702 cancelLongPress(); 703 return true; 704 } 705 } 706 return false; 707 case MotionEvent.ACTION_UP: 708 case MotionEvent.ACTION_CANCEL: 709 super.onTouchEvent(event); 710 if (mHasPerformedLongClick) { 711 mGotTouchDown = false; 712 return false; 713 } 714 if (!mScrolled) { 715 // If the page scrolled, or the TextView scrolled, we do not 716 // want to change the selection 717 cancelLongPress(); 718 if (mGotTouchDown && mWebView != null) { 719 mWebView.touchUpOnTextField(event); 720 } 721 } 722 // Necessary for the WebView to reset its state 723 if (mWebView != null && mDragSent) { 724 mWebView.onTouchEvent(event); 725 } 726 mGotTouchDown = false; 727 break; 728 default: 729 break; 730 } 731 return true; 732 } 733 734 @Override 735 public boolean onTrackballEvent(MotionEvent event) { 736 if (isPopupShowing()) { 737 return super.onTrackballEvent(event); 738 } 739 if (event.getAction() != MotionEvent.ACTION_MOVE) { 740 return false; 741 } 742 // If the Cursor is not on the text input, webview should handle the 743 // trackball 744 if (!mWebView.nativeCursorMatchesFocus()) { 745 return mWebView.onTrackballEvent(event); 746 } 747 Spannable text = (Spannable) getText(); 748 MovementMethod move = getMovementMethod(); 749 if (move != null && getLayout() != null && 750 move.onTrackballEvent(this, text, event)) { 751 // Selection is changed in onSelectionChanged 752 return true; 753 } 754 return false; 755 } 756 757 @Override 758 public boolean performLongClick() { 759 mHasPerformedLongClick = true; 760 return super.performLongClick(); 761 } 762 763 /** 764 * Remove this WebTextView from its host WebView, and return 765 * focus to the host. 766 */ 767 /* package */ void remove() { 768 // hide the soft keyboard when the edit text is out of focus 769 InputMethodManager imm = InputMethodManager.getInstance(mContext); 770 if (imm.isActive(this)) { 771 imm.hideSoftInputFromWindow(getWindowToken(), 0); 772 } 773 mWebView.removeView(this); 774 mWebView.requestFocus(); 775 } 776 777 /** 778 * Move the caret/selection into view. 779 */ 780 /* package */ void bringIntoView() { 781 bringPointIntoView(Selection.getSelectionEnd(getText())); 782 } 783 784 @Override 785 public boolean bringPointIntoView(int offset) { 786 if (mWebView == null) return false; 787 if (mWebView.nativeFocusCandidateIsPassword()) { 788 return getLayout() != null && super.bringPointIntoView(offset); 789 } 790 // For non password text input, tell webkit to move the caret/selection 791 // on screen, since webkit draws them. 792 mWebView.revealSelection(); 793 return true; 794 } 795 796 /** 797 * Send the DOM events for the specified event. 798 * @param event KeyEvent to be translated into a DOM event. 799 */ 800 private void sendDomEvent(KeyEvent event) { 801 mWebView.passToJavaScript(getText().toString(), event); 802 } 803 804 /** 805 * Always use this instead of setAdapter, as this has features specific to 806 * the WebTextView. 807 */ 808 public void setAdapterCustom(AutoCompleteAdapter adapter) { 809 if (adapter != null) { 810 setInputType(getInputType() 811 | EditorInfo.TYPE_TEXT_FLAG_AUTO_COMPLETE); 812 adapter.setTextView(this); 813 } 814 super.setAdapter(adapter); 815 if (mAutoFillable) { 816 setOnItemClickListener(new AdapterView.OnItemClickListener() { 817 @Override 818 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 819 if (id == 0 && position == 0) { 820 // Blank out the text box while we wait for WebCore to fill the form. 821 replaceText(""); 822 WebSettings settings = mWebView.getSettings(); 823 if (mAutoFillProfileIsSet) { 824 // Call a webview method to tell WebCore to autofill the form. 825 mWebView.autoFillForm(mQueryId); 826 } else { 827 // There is no autofill profile setup yet and the user has 828 // elected to try and set one up. Call through to the 829 // embedder to action that. 830 mWebView.getWebChromeClient().setupAutoFill( 831 mHandler.obtainMessage(AUTOFILL_FORM)); 832 } 833 } 834 } 835 }); 836 } else { 837 setOnItemClickListener(null); 838 } 839 showDropDown(); 840 } 841 842 /** 843 * This is a special version of ArrayAdapter which changes its text size 844 * to match the text size of its host TextView. 845 */ 846 public static class AutoCompleteAdapter extends ArrayAdapter<String> { 847 private TextView mTextView; 848 849 public AutoCompleteAdapter(Context context, ArrayList<String> entries) { 850 super(context, com.android.internal.R.layout 851 .web_text_view_dropdown, entries); 852 } 853 854 /** 855 * {@inheritDoc} 856 */ 857 public View getView(int position, View convertView, ViewGroup parent) { 858 TextView tv = 859 (TextView) super.getView(position, convertView, parent); 860 if (tv != null && mTextView != null) { 861 tv.setTextSize(mTextView.getTextSize()); 862 } 863 return tv; 864 } 865 866 /** 867 * Set the TextView so we can match its text size. 868 */ 869 private void setTextView(TextView tv) { 870 mTextView = tv; 871 } 872 } 873 874 /** 875 * Sets the selection when the user clicks on a textfield or textarea with 876 * the trackball or center key, or starts typing into it without clicking on 877 * it. 878 */ 879 /* package */ void setDefaultSelection() { 880 Spannable text = (Spannable) getText(); 881 int selection = mSingle ? text.length() : 0; 882 if (Selection.getSelectionStart(text) == selection 883 && Selection.getSelectionEnd(text) == selection) { 884 // The selection of the UI copy is set correctly, but the 885 // WebTextView still needs to inform the webkit thread to set the 886 // selection. Normally that is done in onSelectionChanged, but 887 // onSelectionChanged will not be called because the UI copy is not 888 // changing. (This can happen when the WebTextView takes focus. 889 // That onSelectionChanged was blocked because the selection set 890 // when focusing is not necessarily the desirable selection for 891 // WebTextView.) 892 if (mWebView != null) { 893 mWebView.setSelection(selection, selection); 894 } 895 } else { 896 Selection.setSelection(text, selection, selection); 897 } 898 if (mWebView != null) mWebView.incrementTextGeneration(); 899 } 900 901 /** 902 * Determine whether to use the system-wide password disguising method, 903 * or to use none. 904 * @param inPassword True if the textfield is a password field. 905 */ 906 /* package */ void setInPassword(boolean inPassword) { 907 if (inPassword) { 908 setInputType(EditorInfo.TYPE_CLASS_TEXT | EditorInfo. 909 TYPE_TEXT_VARIATION_WEB_PASSWORD); 910 createBackground(); 911 } 912 // For password fields, draw the WebTextView. For others, just show 913 // webkit's drawing. 914 if (!DebugFlags.DRAW_WEBTEXTVIEW) { 915 setWillNotDraw(!inPassword); 916 } 917 setBackgroundDrawable(inPassword ? mBackground : null); 918 } 919 920 /** 921 * Private class used for the background of a password textfield. 922 */ 923 private static class OutlineDrawable extends Drawable { 924 private Paint mBackgroundPaint; 925 private Paint mOutlinePaint; 926 private float[] mLines; 927 public OutlineDrawable() { 928 mBackgroundPaint = new Paint(Paint.ANTI_ALIAS_FLAG); 929 mBackgroundPaint.setColor(Color.WHITE); 930 931 mOutlinePaint = new Paint(Paint.ANTI_ALIAS_FLAG); 932 mOutlinePaint.setColor(Color.BLACK); 933 mOutlinePaint.setStyle(Paint.Style.STROKE); 934 935 mLines = new float[16]; 936 } 937 @Override 938 public void setBounds(int left, int top, int right, int bottom) { 939 super.setBounds(left, top, right, bottom); 940 // Top line 941 mLines[0] = left; 942 mLines[1] = top + 1; 943 mLines[2] = right; 944 mLines[3] = top + 1; 945 // Right line 946 mLines[4] = right; 947 mLines[5] = top; 948 mLines[6] = right; 949 mLines[7] = bottom; 950 // Bottom line 951 mLines[8] = left; 952 mLines[9] = bottom; 953 mLines[10] = right; 954 mLines[11] = bottom; 955 // Left line 956 mLines[12] = left + 1; 957 mLines[13] = top; 958 mLines[14] = left + 1; 959 mLines[15] = bottom; 960 } 961 @Override 962 public void draw(Canvas canvas) { 963 // Draw the background. 964 canvas.drawRect(getBounds(), mBackgroundPaint); 965 // Draw the outline. 966 canvas.drawLines(mLines, mOutlinePaint); 967 } 968 // Always want it to be opaque. 969 @Override 970 public int getOpacity() { 971 return PixelFormat.OPAQUE; 972 } 973 // These are needed because they are abstract in Drawable. 974 @Override 975 public void setAlpha(int alpha) { } 976 @Override 977 public void setColorFilter(ColorFilter cf) { } 978 } 979 980 /** 981 * Create a background for the WebTextView and set up the paint for drawing 982 * the text. This way, we can see the password transformation of the 983 * system, which (optionally) shows the actual text before changing to dots. 984 * The background is necessary to hide the webkit-drawn text beneath. 985 */ 986 private void createBackground() { 987 if (mBackground != null) { 988 return; 989 } 990 mBackground = new OutlineDrawable(); 991 992 setGravity(Gravity.CENTER_VERTICAL); 993 } 994 995 @Override 996 public void setInputType(int type) { 997 mFromSetInputType = true; 998 super.setInputType(type); 999 mFromSetInputType = false; 1000 } 1001 1002 private void setMaxLength(int maxLength) { 1003 mMaxLength = maxLength; 1004 if (-1 == maxLength) { 1005 setFilters(NO_FILTERS); 1006 } else { 1007 setFilters(new InputFilter[] { 1008 new InputFilter.LengthFilter(maxLength) }); 1009 } 1010 } 1011 1012 /** 1013 * Set the pointer for this node so it can be determined which node this 1014 * WebTextView represents. 1015 * @param ptr Integer representing the pointer to the node which this 1016 * WebTextView represents. 1017 */ 1018 /* package */ void setNodePointer(int ptr) { 1019 mNodePointer = ptr; 1020 } 1021 1022 /** 1023 * Determine the position and size of WebTextView, and add it to the 1024 * WebView's view heirarchy. All parameters are presumed to be in 1025 * view coordinates. Also requests Focus and sets the cursor to not 1026 * request to be in view. 1027 * @param x x-position of the textfield. 1028 * @param y y-position of the textfield. 1029 * @param width width of the textfield. 1030 * @param height height of the textfield. 1031 */ 1032 /* package */ void setRect(int x, int y, int width, int height) { 1033 LayoutParams lp = (LayoutParams) getLayoutParams(); 1034 if (null == lp) { 1035 lp = new LayoutParams(width, height, x, y); 1036 } else { 1037 lp.x = x; 1038 lp.y = y; 1039 lp.width = width; 1040 lp.height = height; 1041 } 1042 if (getParent() == null) { 1043 mWebView.addView(this, lp); 1044 } else { 1045 setLayoutParams(lp); 1046 } 1047 // Set up a measure spec so a layout can always be recreated. 1048 mWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY); 1049 mHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY); 1050 } 1051 1052 /** 1053 * Set the selection, and disable our onSelectionChanged action. 1054 */ 1055 /* package */ void setSelectionFromWebKit(int start, int end) { 1056 if (start < 0 || end < 0) return; 1057 Spannable text = (Spannable) getText(); 1058 int length = text.length(); 1059 if (start > length || end > length) return; 1060 mFromWebKit = true; 1061 Selection.setSelection(text, start, end); 1062 mFromWebKit = false; 1063 } 1064 1065 /** 1066 * Update the text size according to the size of the focus candidate's text 1067 * size in mWebView. Should only be called from mWebView. 1068 */ 1069 /* package */ void updateTextSize() { 1070 Assert.assertNotNull("updateTextSize should only be called from " 1071 + "mWebView, so mWebView should never be null!", mWebView); 1072 // Note that this is approximately WebView.contentToViewDimension, 1073 // without being rounded. 1074 float size = mWebView.nativeFocusCandidateTextSize() 1075 * mWebView.getScale(); 1076 setTextSize(TypedValue.COMPLEX_UNIT_PX, size); 1077 } 1078 1079 /** 1080 * Set the text to the new string, but use the old selection, making sure 1081 * to keep it within the new string. 1082 * @param text The new text to place in the textfield. 1083 */ 1084 /* package */ void setTextAndKeepSelection(String text) { 1085 mPreChange = text.toString(); 1086 Editable edit = (Editable) getText(); 1087 int selStart = Selection.getSelectionStart(edit); 1088 int selEnd = Selection.getSelectionEnd(edit); 1089 mInSetTextAndKeepSelection = true; 1090 edit.replace(0, edit.length(), text); 1091 int newLength = edit.length(); 1092 if (selStart > newLength) selStart = newLength; 1093 if (selEnd > newLength) selEnd = newLength; 1094 Selection.setSelection(edit, selStart, selEnd); 1095 mInSetTextAndKeepSelection = false; 1096 updateCachedTextfield(); 1097 } 1098 1099 /** 1100 * Called by WebView.rebuildWebTextView(). Based on the type of the <input> 1101 * element, set up the WebTextView, its InputType, and IME Options properly. 1102 * @param type int corresponding to enum "Type" defined in CachedInput.h. 1103 * Does not correspond to HTMLInputElement::InputType so this 1104 * is unaffected if that changes, and also because that has no 1105 * type corresponding to textarea (which is its own tag). 1106 */ 1107 /* package */ void setType(int type) { 1108 if (mWebView == null) return; 1109 boolean single = true; 1110 boolean inPassword = false; 1111 int maxLength = -1; 1112 int inputType = EditorInfo.TYPE_CLASS_TEXT 1113 | EditorInfo.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT; 1114 int imeOptions = EditorInfo.IME_FLAG_NO_EXTRACT_UI 1115 | EditorInfo.IME_FLAG_NO_FULLSCREEN; 1116 if (TEXT_AREA != type 1117 && mWebView.nativeFocusCandidateHasNextTextfield()) { 1118 imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT; 1119 } 1120 switch (type) { 1121 case NORMAL_TEXT_FIELD: 1122 imeOptions |= EditorInfo.IME_ACTION_GO; 1123 break; 1124 case TEXT_AREA: 1125 single = false; 1126 inputType |= EditorInfo.TYPE_TEXT_FLAG_MULTI_LINE 1127 | EditorInfo.TYPE_TEXT_FLAG_CAP_SENTENCES 1128 | EditorInfo.TYPE_TEXT_FLAG_AUTO_CORRECT; 1129 imeOptions |= EditorInfo.IME_ACTION_NONE; 1130 break; 1131 case PASSWORD: 1132 inPassword = true; 1133 imeOptions |= EditorInfo.IME_ACTION_GO; 1134 break; 1135 case SEARCH: 1136 imeOptions |= EditorInfo.IME_ACTION_SEARCH; 1137 break; 1138 case EMAIL: 1139 inputType = EditorInfo.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS; 1140 imeOptions |= EditorInfo.IME_ACTION_GO; 1141 break; 1142 case NUMBER: 1143 inputType |= EditorInfo.TYPE_CLASS_NUMBER; 1144 // Number and telephone do not have both a Tab key and an 1145 // action, so set the action to NEXT 1146 imeOptions |= EditorInfo.IME_ACTION_NEXT; 1147 break; 1148 case TELEPHONE: 1149 inputType |= EditorInfo.TYPE_CLASS_PHONE; 1150 imeOptions |= EditorInfo.IME_ACTION_NEXT; 1151 break; 1152 case URL: 1153 // TYPE_TEXT_VARIATION_URI prevents Tab key from showing, so 1154 // exclude it for now. 1155 imeOptions |= EditorInfo.IME_ACTION_GO; 1156 break; 1157 default: 1158 imeOptions |= EditorInfo.IME_ACTION_GO; 1159 break; 1160 } 1161 setHint(null); 1162 if (single) { 1163 mWebView.requestLabel(mWebView.nativeFocusCandidateFramePointer(), 1164 mNodePointer); 1165 maxLength = mWebView.nativeFocusCandidateMaxLength(); 1166 if (type != PASSWORD) { 1167 String name = mWebView.nativeFocusCandidateName(); 1168 if (name != null && name.length() > 0) { 1169 mWebView.requestFormData(name, mNodePointer, mAutoFillable); 1170 } 1171 } 1172 } 1173 mSingle = single; 1174 setMaxLength(maxLength); 1175 setHorizontallyScrolling(single); 1176 setInputType(inputType); 1177 setImeOptions(imeOptions); 1178 setInPassword(inPassword); 1179 AutoCompleteAdapter adapter = null; 1180 setAdapterCustom(adapter); 1181 } 1182 1183 /** 1184 * Update the cache to reflect the current text. 1185 */ 1186 /* package */ void updateCachedTextfield() { 1187 mWebView.updateCachedTextfield(getText().toString()); 1188 } 1189 1190 /* package */ void setAutoFillProfileIsSet(boolean autoFillProfileIsSet) { 1191 mAutoFillProfileIsSet = autoFillProfileIsSet; 1192 } 1193} 1194