1 /* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.webkit; 18 19 import android.content.Context; 20 import android.graphics.Canvas; 21 import android.graphics.Color; 22 import android.graphics.ColorFilter; 23 import android.graphics.Paint; 24 import android.graphics.Paint.Style; 25 import android.graphics.PixelFormat; 26 import android.graphics.Rect; 27 import android.graphics.drawable.ColorDrawable; 28 import android.graphics.drawable.Drawable; 29 import android.os.Bundle; 30 import android.os.Handler; 31 import android.os.Message; 32 import android.os.ResultReceiver; 33 import android.text.BoringLayout.Metrics; 34 import android.text.DynamicLayout; 35 import android.text.Editable; 36 import android.text.InputFilter; 37 import android.text.InputType; 38 import android.text.Layout; 39 import android.text.Selection; 40 import android.text.Spannable; 41 import android.text.TextPaint; 42 import android.text.TextUtils; 43 import android.text.method.MovementMethod; 44 import android.text.method.Touch; 45 import android.util.Log; 46 import android.util.TypedValue; 47 import android.view.Gravity; 48 import android.view.KeyCharacterMap; 49 import android.view.KeyEvent; 50 import android.view.MotionEvent; 51 import android.view.View; 52 import android.view.ViewConfiguration; 53 import android.view.ViewGroup; 54 import android.view.inputmethod.EditorInfo; 55 import android.view.inputmethod.InputConnection; 56 import android.view.inputmethod.InputMethodManager; 57 import android.widget.AbsoluteLayout.LayoutParams; 58 import android.widget.AdapterView; 59 import android.widget.ArrayAdapter; 60 import android.widget.AutoCompleteTextView; 61 import android.widget.TextView; 62 63 import junit.framework.Assert; 64 65 import java.net.MalformedURLException; 66 import java.net.URL; 67 import java.util.ArrayList; 68 69 /** 70 * WebTextView is a specialized version of EditText used by WebView 71 * to overlay html textfields (and textareas) to use our standard 72 * text editing. 73 */ 74 /* package */ class WebTextView extends AutoCompleteTextView 75 implements AdapterView.OnItemClickListener { 76 77 static final String LOGTAG = "webtextview"; 78 79 private int mRingInset; 80 81 private WebView mWebView; 82 private boolean mSingle; 83 private int mWidthSpec; 84 private int mHeightSpec; 85 private int mNodePointer; 86 // FIXME: This is a hack for blocking unmatched key ups, in particular 87 // on the enter key. The method for blocking unmatched key ups prevents 88 // the shift key from working properly. 89 private boolean mGotEnterDown; 90 private int mMaxLength; 91 // Keep track of the text before the change so we know whether we actually 92 // need to send down the DOM events. 93 private String mPreChange; 94 // Variables for keeping track of the touch down, to send to the WebView 95 // when a drag starts 96 private float mDragStartX; 97 private float mDragStartY; 98 private long mDragStartTime; 99 private boolean mDragSent; 100 // True if the most recent drag event has caused either the TextView to 101 // scroll or the web page to scroll. Gets reset after a touch down. 102 private boolean mScrolled; 103 // Whether or not a selection change was generated from webkit. If it was, 104 // we do not need to pass the selection back to webkit. 105 private boolean mFromWebKit; 106 // Whether or not a selection change was generated from the WebTextView 107 // gaining focus. If it is, we do not want to pass it to webkit. This 108 // selection comes from the MovementMethod, but we behave differently. If 109 // WebTextView gained focus from a touch, webkit will determine the 110 // selection. 111 private boolean mFromFocusChange; 112 // Whether or not a selection change was generated from setInputType. We 113 // do not want to pass this change to webkit. 114 private boolean mFromSetInputType; 115 private boolean mGotTouchDown; 116 // Keep track of whether a long press has happened. Only meaningful after 117 // an ACTION_DOWN MotionEvent 118 private boolean mHasPerformedLongClick; 119 private boolean mInSetTextAndKeepSelection; 120 // Array to store the final character added in onTextChanged, so that its 121 // KeyEvents may be determined. 122 private char[] mCharacter = new char[1]; 123 // This is used to reset the length filter when on a textfield 124 // with no max length. 125 // FIXME: This can be replaced with TextView.NO_FILTERS if that 126 // is made public/protected. 127 private static final InputFilter[] NO_FILTERS = new InputFilter[0]; 128 // For keeping track of the fact that the delete key was pressed, so 129 // we can simply pass a delete key instead of calling deleteSelection. 130 private boolean mGotDelete; 131 private int mDelSelStart; 132 private int mDelSelEnd; 133 134 // Keep in sync with native constant in 135 // external/webkit/WebKit/android/WebCoreSupport/autofill/WebAutoFill.cpp 136 /* package */ static final int FORM_NOT_AUTOFILLABLE = -1; 137 138 private boolean mAutoFillable; // Is this textview part of an autofillable form? 139 private int mQueryId; 140 private boolean mAutoFillProfileIsSet; 141 // Used to determine whether onFocusChanged was called as a result of 142 // calling remove(). 143 private boolean mInsideRemove; 144 private class MyResultReceiver extends ResultReceiver { 145 @Override 146 protected void onReceiveResult(int resultCode, Bundle resultData) { 147 if (resultCode == InputMethodManager.RESULT_SHOWN 148 && mWebView != null) { 149 mWebView.revealSelection(); 150 } 151 } 152 153 /** 154 * @param handler 155 */ 156 public MyResultReceiver(Handler handler) { 157 super(handler); 158 } 159 } 160 private MyResultReceiver mReceiver; 161 162 // Types used with setType. Keep in sync with CachedInput.h 163 private static final int NORMAL_TEXT_FIELD = 0; 164 private static final int TEXT_AREA = 1; 165 private static final int PASSWORD = 2; 166 private static final int SEARCH = 3; 167 private static final int EMAIL = 4; 168 private static final int NUMBER = 5; 169 private static final int TELEPHONE = 6; 170 private static final int URL = 7; 171 172 private static final int AUTOFILL_FORM = 100; 173 private Handler mHandler; 174 175 /** 176 * Create a new WebTextView. 177 * @param context The Context for this WebTextView. 178 * @param webView The WebView that created this. 179 */ 180 /* package */ WebTextView(Context context, WebView webView, int autoFillQueryId) { 181 super(context, null, com.android.internal.R.attr.webTextViewStyle); 182 mWebView = webView; 183 mMaxLength = -1; 184 setAutoFillable(autoFillQueryId); 185 // Turn on subpixel text, and turn off kerning, so it better matches 186 // the text in webkit. 187 TextPaint paint = getPaint(); 188 int flags = paint.getFlags() & ~Paint.DEV_KERN_TEXT_FLAG 189 | Paint.SUBPIXEL_TEXT_FLAG | Paint.DITHER_FLAG; 190 paint.setFlags(flags); 191 192 // Set the text color to black, regardless of the theme. This ensures 193 // that other applications that use embedded WebViews will properly 194 // display the text in password textfields. 195 setTextColor(DebugFlags.DRAW_WEBTEXTVIEW ? Color.RED : Color.BLACK); 196 setBackgroundDrawable(DebugFlags.DRAW_WEBTEXTVIEW ? null : new ColorDrawable(Color.WHITE)); 197 198 // This helps to align the text better with the text in the web page. 199 setIncludeFontPadding(false); 200 201 mHandler = new Handler() { 202 @Override 203 public void handleMessage(Message msg) { 204 switch (msg.what) { 205 case AUTOFILL_FORM: 206 mWebView.autoFillForm(mQueryId); 207 break; 208 } 209 } 210 }; 211 mReceiver = new MyResultReceiver(mHandler); 212 float ringWidth = 2f * context.getResources().getDisplayMetrics().density; 213 mRingInset = (int) ringWidth; 214 setBackgroundDrawable(new BackgroundDrawable(mRingInset)); 215 setPadding(getPaddingLeft(), getPaddingTop(), getPaddingRight(), 216 getPaddingBottom()); 217 } 218 219 private static class BackgroundDrawable extends Drawable { 220 221 private Paint mPaint = new Paint(); 222 private int mBorderWidth; 223 private Rect mInsetRect = new Rect(); 224 225 public BackgroundDrawable(int width) { 226 mPaint = new Paint(); 227 mPaint.setStrokeWidth(width); 228 mBorderWidth = width; 229 } 230 231 @Override 232 public void draw(Canvas canvas) { 233 mPaint.setColor(0x6633b5e5); 234 canvas.drawRect(getBounds(), mPaint); 235 mInsetRect.left = getBounds().left + mBorderWidth; 236 mInsetRect.top = getBounds().top + mBorderWidth; 237 mInsetRect.right = getBounds().right - mBorderWidth; 238 mInsetRect.bottom = getBounds().bottom - mBorderWidth; 239 mPaint.setColor(Color.WHITE); 240 canvas.drawRect(mInsetRect, mPaint); 241 } 242 243 @Override 244 public void setAlpha(int alpha) { 245 } 246 247 @Override 248 public void setColorFilter(ColorFilter cf) { 249 } 250 251 @Override 252 public int getOpacity() { 253 return PixelFormat.TRANSLUCENT; 254 } 255 256 } 257 258 public void setAutoFillable(int queryId) { 259 mAutoFillable = mWebView.getSettings().getAutoFillEnabled() 260 && (queryId != FORM_NOT_AUTOFILLABLE); 261 mQueryId = queryId; 262 } 263 264 @Override 265 public void setPadding(int left, int top, int right, int bottom) { 266 super.setPadding(left + mRingInset, top + mRingInset, 267 right + mRingInset, bottom + mRingInset); 268 } 269 270 @Override 271 public boolean dispatchKeyEvent(KeyEvent event) { 272 if (event.isSystem()) { 273 return super.dispatchKeyEvent(event); 274 } 275 // Treat ACTION_DOWN and ACTION MULTIPLE the same 276 boolean down = event.getAction() != KeyEvent.ACTION_UP; 277 int keyCode = event.getKeyCode(); 278 279 boolean isArrowKey = false; 280 switch(keyCode) { 281 case KeyEvent.KEYCODE_DPAD_LEFT: 282 case KeyEvent.KEYCODE_DPAD_RIGHT: 283 case KeyEvent.KEYCODE_DPAD_UP: 284 case KeyEvent.KEYCODE_DPAD_DOWN: 285 isArrowKey = true; 286 break; 287 } 288 289 if (KeyEvent.KEYCODE_TAB == keyCode) { 290 if (down) { 291 onEditorAction(EditorInfo.IME_ACTION_NEXT); 292 } 293 return true; 294 } 295 Spannable text = (Spannable) getText(); 296 int oldStart = Selection.getSelectionStart(text); 297 int oldEnd = Selection.getSelectionEnd(text); 298 // Normally the delete key's dom events are sent via onTextChanged. 299 // However, if the cursor is at the beginning of the field, which 300 // includes the case where it has zero length, then the text is not 301 // changed, so send the events immediately. 302 if (KeyEvent.KEYCODE_DEL == keyCode) { 303 if (oldStart == 0 && oldEnd == 0) { 304 sendDomEvent(event); 305 return true; 306 } 307 if (down) { 308 mGotDelete = true; 309 mDelSelStart = oldStart; 310 mDelSelEnd = oldEnd; 311 } 312 } 313 314 if (mSingle && (KeyEvent.KEYCODE_ENTER == keyCode 315 || KeyEvent.KEYCODE_NUMPAD_ENTER == keyCode)) { 316 if (isPopupShowing()) { 317 return super.dispatchKeyEvent(event); 318 } 319 if (!down) { 320 // Hide the keyboard, since the user has just submitted this 321 // form. The submission happens thanks to the two calls 322 // to sendDomEvent. 323 InputMethodManager.getInstance(mContext) 324 .hideSoftInputFromWindow(getWindowToken(), 0); 325 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, keyCode)); 326 sendDomEvent(event); 327 } 328 return super.dispatchKeyEvent(event); 329 } else if (KeyEvent.KEYCODE_DPAD_CENTER == keyCode) { 330 // Note that this handles center key and trackball. 331 if (isPopupShowing()) { 332 return super.dispatchKeyEvent(event); 333 } 334 // Center key should be passed to a potential onClick 335 if (!down) { 336 mWebView.centerKeyPressOnTextField(); 337 } 338 // Pass to super to handle longpress. 339 return super.dispatchKeyEvent(event); 340 } 341 342 // Ensure there is a layout so arrow keys are handled properly. 343 if (getLayout() == null) { 344 measure(mWidthSpec, mHeightSpec); 345 } 346 347 int oldLength = text.length(); 348 boolean maxedOut = mMaxLength != -1 && oldLength == mMaxLength; 349 // If we are at max length, and there is a selection rather than a 350 // cursor, we need to store the text to compare later, since the key 351 // may have changed the string. 352 String oldText; 353 if (maxedOut && oldEnd != oldStart) { 354 oldText = text.toString(); 355 } else { 356 oldText = ""; 357 } 358 if (super.dispatchKeyEvent(event)) { 359 // If the WebTextView handled the key it was either an alphanumeric 360 // key, a delete, or a movement within the text. All of those are 361 // ok to pass to javascript. 362 363 // UNLESS there is a max length determined by the html. In that 364 // case, if the string was already at the max length, an 365 // alphanumeric key will be erased by the LengthFilter, 366 // so do not pass down to javascript, and instead 367 // return true. If it is an arrow key or a delete key, we can go 368 // ahead and pass it down. 369 if (KeyEvent.KEYCODE_ENTER == keyCode 370 || KeyEvent.KEYCODE_NUMPAD_ENTER == keyCode) { 371 // For multi-line text boxes, newlines will 372 // trigger onTextChanged for key down (which will send both 373 // key up and key down) but not key up. 374 mGotEnterDown = true; 375 } 376 if (maxedOut && !isArrowKey && keyCode != KeyEvent.KEYCODE_DEL) { 377 if (oldEnd == oldStart) { 378 // Return true so the key gets dropped. 379 return true; 380 } else if (!oldText.equals(getText().toString())) { 381 // FIXME: This makes the text work properly, but it 382 // does not pass down the key event, so it may not 383 // work for a textfield that has the type of 384 // behavior of GoogleSuggest. That said, it is 385 // unlikely that a site would combine the two in 386 // one textfield. 387 Spannable span = (Spannable) getText(); 388 int newStart = Selection.getSelectionStart(span); 389 int newEnd = Selection.getSelectionEnd(span); 390 mWebView.replaceTextfieldText(0, oldLength, span.toString(), 391 newStart, newEnd); 392 return true; 393 } 394 } 395 /* FIXME: 396 * In theory, we would like to send the events for the arrow keys. 397 * However, the TextView can arbitrarily change the selection (i.e. 398 * long press followed by using the trackball). Therefore, we keep 399 * in sync with the TextView via onSelectionChanged. If we also 400 * send the DOM event, we lose the correct selection. 401 if (isArrowKey) { 402 // Arrow key does not change the text, but we still want to send 403 // the DOM events. 404 sendDomEvent(event); 405 } 406 */ 407 return true; 408 } 409 // Ignore the key up event for newlines. This prevents 410 // multiple newlines in the native textarea. 411 if (mGotEnterDown && !down) { 412 return true; 413 } 414 // if it is a navigation key, pass it to WebView 415 if (isArrowKey) { 416 // WebView check the trackballtime in onKeyDown to avoid calling 417 // native from both trackball and key handling. As this is called 418 // from WebTextView, we always want WebView to check with native. 419 // Reset trackballtime to ensure it. 420 mWebView.resetTrackballTime(); 421 return down ? mWebView.onKeyDown(keyCode, event) : mWebView 422 .onKeyUp(keyCode, event); 423 } 424 return false; 425 } 426 427 void ensureLayout() { 428 if (getLayout() == null) { 429 // Ensure we have a Layout 430 measure(mWidthSpec, mHeightSpec); 431 LayoutParams params = (LayoutParams) getLayoutParams(); 432 if (params != null) { 433 layout(params.x, params.y, params.x + params.width, 434 params.y + params.height); 435 } 436 } 437 } 438 439 /* package */ ResultReceiver getResultReceiver() { return mReceiver; } 440 441 /** 442 * Determine whether this WebTextView currently represents the node 443 * represented by ptr. 444 * @param ptr Pointer to a node to compare to. 445 * @return boolean Whether this WebTextView already represents the node 446 * pointed to by ptr. 447 */ 448 /* package */ boolean isSameTextField(int ptr) { 449 return ptr == mNodePointer; 450 } 451 452 /** 453 * Ensure that the underlying text field/area is lined up with the WebTextView. 454 */ 455 private void lineUpScroll() { 456 Layout layout = getLayout(); 457 if (mWebView != null && layout != null) { 458 if (mSingle) { 459 // textfields only need to be lined up horizontally. 460 float maxScrollX = layout.getLineRight(0) - getWidth(); 461 if (DebugFlags.WEB_TEXT_VIEW) { 462 Log.v(LOGTAG, "onTouchEvent x=" + mScrollX + " y=" 463 + mScrollY + " maxX=" + maxScrollX); 464 } 465 mWebView.scrollFocusedTextInputX(maxScrollX > 0 ? 466 mScrollX / maxScrollX : 0); 467 } else { 468 // textareas only need to be lined up vertically. 469 mWebView.scrollFocusedTextInputY(mScrollY); 470 } 471 } 472 } 473 474 @Override 475 protected void makeNewLayout(int w, int hintWidth, Metrics boring, 476 Metrics hintBoring, int ellipsisWidth, boolean bringIntoView) { 477 // Necessary to get a Layout to work with, and to do the other work that 478 // makeNewLayout does. 479 super.makeNewLayout(w, hintWidth, boring, hintBoring, ellipsisWidth, 480 bringIntoView); 481 lineUpScroll(); 482 } 483 484 /** 485 * Custom layout which figures out its line spacing. If -1 is passed in for 486 * the height, it will use the ascent and descent from the paint to 487 * determine the line spacing. Otherwise it will use the spacing provided. 488 */ 489 private static class WebTextViewLayout extends DynamicLayout { 490 private float mLineHeight; 491 private float mDifference; 492 public WebTextViewLayout(CharSequence base, CharSequence display, 493 TextPaint paint, 494 int width, Alignment align, 495 float spacingMult, float spacingAdd, 496 boolean includepad, 497 TextUtils.TruncateAt ellipsize, int ellipsizedWidth, 498 float lineHeight) { 499 super(base, display, paint, width, align, spacingMult, spacingAdd, 500 includepad, ellipsize, ellipsizedWidth); 501 float paintLineHeight = paint.descent() - paint.ascent(); 502 if (lineHeight == -1f) { 503 mLineHeight = paintLineHeight; 504 mDifference = 0f; 505 } else { 506 mLineHeight = lineHeight; 507 // Through trial and error, I found this calculation to improve 508 // the accuracy of line placement. 509 mDifference = (lineHeight - paintLineHeight) / 2; 510 } 511 } 512 513 @Override 514 public int getLineTop(int line) { 515 return Math.round(mLineHeight * line - mDifference); 516 } 517 } 518 519 @Override public InputConnection onCreateInputConnection( 520 EditorInfo outAttrs) { 521 InputConnection connection = super.onCreateInputConnection(outAttrs); 522 if (mWebView != null) { 523 // Use the name of the textfield + the url. Use backslash as an 524 // arbitrary separator. 525 outAttrs.fieldName = mWebView.nativeFocusCandidateName() + "\\" 526 + mWebView.getUrl(); 527 } 528 return connection; 529 } 530 531 @Override 532 public void onEditorAction(int actionCode) { 533 switch (actionCode) { 534 case EditorInfo.IME_ACTION_NEXT: 535 if (mWebView.nativeMoveCursorToNextTextInput()) { 536 // Preemptively rebuild the WebTextView, so that the action will 537 // be set properly. 538 mWebView.rebuildWebTextView(); 539 setDefaultSelection(); 540 mWebView.invalidate(); 541 } 542 break; 543 case EditorInfo.IME_ACTION_DONE: 544 super.onEditorAction(actionCode); 545 break; 546 case EditorInfo.IME_ACTION_GO: 547 case EditorInfo.IME_ACTION_SEARCH: 548 // Send an enter and hide the soft keyboard 549 InputMethodManager.getInstance(mContext) 550 .hideSoftInputFromWindow(getWindowToken(), 0); 551 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 552 KeyEvent.KEYCODE_ENTER)); 553 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 554 KeyEvent.KEYCODE_ENTER)); 555 556 default: 557 break; 558 } 559 } 560 561 @Override 562 protected void onFocusChanged(boolean focused, int direction, 563 Rect previouslyFocusedRect) { 564 mFromFocusChange = true; 565 super.onFocusChanged(focused, direction, previouslyFocusedRect); 566 if (focused) { 567 mWebView.setActive(true); 568 } else if (!mInsideRemove) { 569 mWebView.setActive(false); 570 } 571 mFromFocusChange = false; 572 } 573 574 // AdapterView.OnItemClickListener implementation 575 576 @Override 577 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 578 if (id == 0 && position == 0) { 579 // Blank out the text box while we wait for WebCore to fill the form. 580 replaceText(""); 581 WebSettings settings = mWebView.getSettings(); 582 if (mAutoFillProfileIsSet) { 583 // Call a webview method to tell WebCore to autofill the form. 584 mWebView.autoFillForm(mQueryId); 585 } else { 586 // There is no autofill profile setup yet and the user has 587 // elected to try and set one up. Call through to the 588 // embedder to action that. 589 mWebView.getWebChromeClient().setupAutoFill( 590 mHandler.obtainMessage(AUTOFILL_FORM)); 591 } 592 } 593 } 594 595 @Override 596 protected void onScrollChanged(int l, int t, int oldl, int oldt) { 597 super.onScrollChanged(l, t, oldl, oldt); 598 lineUpScroll(); 599 } 600 601 @Override 602 protected void onSelectionChanged(int selStart, int selEnd) { 603 if (!mFromWebKit && !mFromFocusChange && !mFromSetInputType 604 && mWebView != null && !mInSetTextAndKeepSelection) { 605 if (DebugFlags.WEB_TEXT_VIEW) { 606 Log.v(LOGTAG, "onSelectionChanged selStart=" + selStart 607 + " selEnd=" + selEnd); 608 } 609 mWebView.setSelection(selStart, selEnd); 610 lineUpScroll(); 611 } 612 } 613 614 @Override 615 protected void onTextChanged(CharSequence s,int start,int before,int count){ 616 super.onTextChanged(s, start, before, count); 617 String postChange = s.toString(); 618 // Prevent calls to setText from invoking onTextChanged (since this will 619 // mean we are on a different textfield). Also prevent the change when 620 // going from a textfield with a string of text to one with a smaller 621 // limit on text length from registering the onTextChanged event. 622 if (mPreChange == null || mPreChange.equals(postChange) || 623 (mMaxLength > -1 && mPreChange.length() > mMaxLength && 624 mPreChange.substring(0, mMaxLength).equals(postChange))) { 625 return; 626 } 627 if (0 == count) { 628 if (before > 0) { 629 // For this and all changes to the text, update our cache 630 updateCachedTextfield(); 631 if (mGotDelete) { 632 mGotDelete = false; 633 int oldEnd = start + before; 634 if (mDelSelEnd == oldEnd 635 && (mDelSelStart == start 636 || (mDelSelStart == oldEnd && before == 1))) { 637 // If the selection is set up properly before the 638 // delete, send the DOM events. 639 sendDomEvent(new KeyEvent(KeyEvent.ACTION_DOWN, 640 KeyEvent.KEYCODE_DEL)); 641 sendDomEvent(new KeyEvent(KeyEvent.ACTION_UP, 642 KeyEvent.KEYCODE_DEL)); 643 return; 644 } 645 } 646 // This was simply a delete or a cut, so just delete the 647 // selection. 648 mWebView.deleteSelection(start, start + before); 649 } 650 mGotDelete = false; 651 // before should never be negative, so whether it was a cut 652 // (handled above), or before is 0, in which case nothing has 653 // changed, we should return. 654 return; 655 } 656 // Ensure that this flag gets cleared, since with autocorrect on, a 657 // delete key press may have a more complex result than deleting one 658 // character or the existing selection, so it will not get cleared 659 // above. 660 mGotDelete = false; 661 // Prefer sending javascript events, so when adding one character, 662 // don't replace the unchanged text. 663 if (count > 1 && before == count - 1) { 664 String replaceButOne = mPreChange.subSequence(start, 665 start + before).toString(); 666 String replacedString = s.subSequence(start, 667 start + before).toString(); 668 if (replaceButOne.equals(replacedString)) { 669 // we're just adding one character 670 start += before; 671 before = 0; 672 count = 1; 673 } 674 } 675 mPreChange = postChange; 676 // Find the last character being replaced. If it can be represented by 677 // events, we will pass them to native so we can see javascript events. 678 // Otherwise, replace the text being changed in the textfield. 679 KeyEvent[] events = null; 680 if (count == 1) { 681 TextUtils.getChars(s, start + count - 1, start + count, mCharacter, 0); 682 KeyCharacterMap kmap = KeyCharacterMap.load(KeyCharacterMap.VIRTUAL_KEYBOARD); 683 events = kmap.getEvents(mCharacter); 684 } 685 boolean useKeyEvents = (events != null); 686 if (useKeyEvents) { 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 int length = events.length; 697 for (int i = 0; i < length; i++) { 698 // We never send modifier keys to native code so don't send them 699 // here either. 700 if (!KeyEvent.isModifierKey(events[i].getKeyCode())) { 701 sendDomEvent(events[i]); 702 } 703 } 704 } else { 705 String replace = s.subSequence(start, 706 start + count).toString(); 707 mWebView.replaceTextfieldText(start, start + before, replace, 708 start + count, 709 start + count); 710 } 711 updateCachedTextfield(); 712 } 713 714 @Override 715 public boolean onTouchEvent(MotionEvent event) { 716 switch (event.getAction()) { 717 case MotionEvent.ACTION_DOWN: 718 super.onTouchEvent(event); 719 // This event may be the start of a drag, so store it to pass to the 720 // WebView if it is. 721 mDragStartX = event.getX(); 722 mDragStartY = event.getY(); 723 mDragStartTime = event.getEventTime(); 724 mDragSent = false; 725 mScrolled = false; 726 mGotTouchDown = true; 727 mHasPerformedLongClick = false; 728 break; 729 case MotionEvent.ACTION_MOVE: 730 if (mHasPerformedLongClick) { 731 mGotTouchDown = false; 732 return false; 733 } 734 int slop = ViewConfiguration.get(mContext).getScaledTouchSlop(); 735 Spannable buffer = getText(); 736 int initialScrollX = Touch.getInitialScrollX(this, buffer); 737 int initialScrollY = Touch.getInitialScrollY(this, buffer); 738 super.onTouchEvent(event); 739 int dx = Math.abs(mScrollX - initialScrollX); 740 int dy = Math.abs(mScrollY - initialScrollY); 741 // Use a smaller slop when checking to see if we've moved far enough 742 // to scroll the text, because experimentally, slop has shown to be 743 // to big for the case of a small textfield. 744 int smallerSlop = slop/2; 745 if (dx > smallerSlop || dy > smallerSlop) { 746 // Scrolling is handled in onScrollChanged. 747 mScrolled = true; 748 cancelLongPress(); 749 return true; 750 } 751 if (Math.abs((int) event.getX() - mDragStartX) < slop 752 && Math.abs((int) event.getY() - mDragStartY) < slop) { 753 // If the user has not scrolled further than slop, we should not 754 // send the drag. Instead, do nothing, and when the user lifts 755 // their finger, we will change the selection. 756 return true; 757 } 758 if (mWebView != null) { 759 // Only want to set the initial state once. 760 if (!mDragSent) { 761 mWebView.initiateTextFieldDrag(mDragStartX, mDragStartY, 762 mDragStartTime); 763 mDragSent = true; 764 } 765 boolean scrolled = mWebView.textFieldDrag(event); 766 if (scrolled) { 767 mScrolled = true; 768 cancelLongPress(); 769 return true; 770 } 771 } 772 return false; 773 case MotionEvent.ACTION_UP: 774 case MotionEvent.ACTION_CANCEL: 775 super.onTouchEvent(event); 776 if (mHasPerformedLongClick) { 777 mGotTouchDown = false; 778 return false; 779 } 780 if (!mScrolled) { 781 // If the page scrolled, or the TextView scrolled, we do not 782 // want to change the selection 783 cancelLongPress(); 784 if (mGotTouchDown && mWebView != null) { 785 mWebView.touchUpOnTextField(event); 786 } 787 } 788 // Necessary for the WebView to reset its state 789 if (mWebView != null && mDragSent) { 790 mWebView.onTouchEvent(event); 791 } 792 mGotTouchDown = false; 793 break; 794 default: 795 break; 796 } 797 return true; 798 } 799 800 @Override 801 public boolean onTrackballEvent(MotionEvent event) { 802 if (isPopupShowing()) { 803 return super.onTrackballEvent(event); 804 } 805 if (event.getAction() != MotionEvent.ACTION_MOVE) { 806 return false; 807 } 808 Spannable text = getText(); 809 MovementMethod move = getMovementMethod(); 810 if (move != null && getLayout() != null && 811 move.onTrackballEvent(this, text, event)) { 812 // Selection is changed in onSelectionChanged 813 return true; 814 } 815 return false; 816 } 817 818 @Override 819 public boolean performLongClick() { 820 mHasPerformedLongClick = true; 821 return super.performLongClick(); 822 } 823 824 /** 825 * Remove this WebTextView from its host WebView, and return 826 * focus to the host. 827 */ 828 /* package */ void remove() { 829 // hide the soft keyboard when the edit text is out of focus 830 InputMethodManager imm = InputMethodManager.getInstance(mContext); 831 if (imm.isActive(this)) { 832 imm.hideSoftInputFromWindow(getWindowToken(), 0); 833 } 834 mInsideRemove = true; 835 boolean isFocused = hasFocus(); 836 mWebView.removeView(this); 837 if (isFocused) { 838 mWebView.requestFocus(); 839 } 840 mInsideRemove = false; 841 mHandler.removeCallbacksAndMessages(null); 842 } 843 844 @Override 845 public boolean requestRectangleOnScreen(Rect rectangle, boolean immediate) { 846 // Do nothing, since webkit will put the textfield on screen. 847 return true; 848 } 849 850 /** 851 * Send the DOM events for the specified event. 852 * @param event KeyEvent to be translated into a DOM event. 853 */ 854 private void sendDomEvent(KeyEvent event) { 855 mWebView.passToJavaScript(getText().toString(), event); 856 } 857 858 /** 859 * Always use this instead of setAdapter, as this has features specific to 860 * the WebTextView. 861 */ 862 public void setAdapterCustom(AutoCompleteAdapter adapter) { 863 if (adapter != null) { 864 setInputType(getInputType() 865 | InputType.TYPE_TEXT_FLAG_AUTO_COMPLETE); 866 adapter.setTextView(this); 867 if (mAutoFillable) { 868 setOnItemClickListener(this); 869 } else { 870 setOnItemClickListener(null); 871 } 872 showDropDown(); 873 } else { 874 dismissDropDown(); 875 } 876 super.setAdapter(adapter); 877 } 878 879 /** 880 * This is a special version of ArrayAdapter which changes its text size 881 * to match the text size of its host TextView. 882 */ 883 public static class AutoCompleteAdapter extends ArrayAdapter<String> { 884 private TextView mTextView; 885 886 public AutoCompleteAdapter(Context context, ArrayList<String> entries) { 887 super(context, com.android.internal.R.layout 888 .web_text_view_dropdown, entries); 889 } 890 891 /** 892 * {@inheritDoc} 893 */ 894 @Override 895 public View getView(int position, View convertView, ViewGroup parent) { 896 TextView tv = 897 (TextView) super.getView(position, convertView, parent); 898 if (tv != null && mTextView != null) { 899 tv.setTextSize(TypedValue.COMPLEX_UNIT_PX, mTextView.getTextSize()); 900 } 901 return tv; 902 } 903 904 /** 905 * Set the TextView so we can match its text size. 906 */ 907 private void setTextView(TextView tv) { 908 mTextView = tv; 909 } 910 } 911 912 /** 913 * Sets the selection when the user clicks on a textfield or textarea with 914 * the trackball or center key, or starts typing into it without clicking on 915 * it. 916 */ 917 /* package */ void setDefaultSelection() { 918 Spannable text = (Spannable) getText(); 919 int selection = mSingle ? text.length() : 0; 920 if (Selection.getSelectionStart(text) == selection 921 && Selection.getSelectionEnd(text) == selection) { 922 // The selection of the UI copy is set correctly, but the 923 // WebTextView still needs to inform the webkit thread to set the 924 // selection. Normally that is done in onSelectionChanged, but 925 // onSelectionChanged will not be called because the UI copy is not 926 // changing. (This can happen when the WebTextView takes focus. 927 // That onSelectionChanged was blocked because the selection set 928 // when focusing is not necessarily the desirable selection for 929 // WebTextView.) 930 if (mWebView != null) { 931 mWebView.setSelection(selection, selection); 932 } 933 } else { 934 Selection.setSelection(text, selection, selection); 935 } 936 if (mWebView != null) mWebView.incrementTextGeneration(); 937 } 938 939 @Override 940 public void setInputType(int type) { 941 mFromSetInputType = true; 942 super.setInputType(type); 943 mFromSetInputType = false; 944 } 945 946 private void setMaxLength(int maxLength) { 947 mMaxLength = maxLength; 948 if (-1 == maxLength) { 949 setFilters(NO_FILTERS); 950 } else { 951 setFilters(new InputFilter[] { 952 new InputFilter.LengthFilter(maxLength) }); 953 } 954 } 955 956 /** 957 * Set the pointer for this node so it can be determined which node this 958 * WebTextView represents. 959 * @param ptr Integer representing the pointer to the node which this 960 * WebTextView represents. 961 */ 962 /* package */ void setNodePointer(int ptr) { 963 if (ptr != mNodePointer) { 964 mNodePointer = ptr; 965 setAdapterCustom(null); 966 } 967 } 968 969 /** 970 * Determine the position and size of WebTextView, and add it to the 971 * WebView's view heirarchy. All parameters are presumed to be in 972 * view coordinates. Also requests Focus and sets the cursor to not 973 * request to be in view. 974 * @param x x-position of the textfield. 975 * @param y y-position of the textfield. 976 * @param width width of the textfield. 977 * @param height height of the textfield. 978 */ 979 /* package */ void setRect(int x, int y, int width, int height) { 980 LayoutParams lp = (LayoutParams) getLayoutParams(); 981 x -= mRingInset; 982 y -= mRingInset; 983 width += 2 * mRingInset; 984 height += 2 * mRingInset; 985 boolean needsUpdate = false; 986 if (null == lp) { 987 lp = new LayoutParams(width, height, x, y); 988 } else { 989 if ((lp.x != x) || (lp.y != y) || (lp.width != width) 990 || (lp.height != height)) { 991 needsUpdate = true; 992 lp.x = x; 993 lp.y = y; 994 lp.width = width; 995 lp.height = height; 996 } 997 } 998 if (getParent() == null) { 999 // Insert the view so that it's drawn first (at index 0) 1000 mWebView.addView(this, 0, lp); 1001 } else if (needsUpdate) { 1002 setLayoutParams(lp); 1003 } 1004 // Set up a measure spec so a layout can always be recreated. 1005 mWidthSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY); 1006 mHeightSpec = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY); 1007 } 1008 1009 /** 1010 * Set the selection, and disable our onSelectionChanged action. 1011 */ 1012 /* package */ void setSelectionFromWebKit(int start, int end) { 1013 if (start < 0 || end < 0) return; 1014 Spannable text = (Spannable) getText(); 1015 int length = text.length(); 1016 if (start > length || end > length) return; 1017 mFromWebKit = true; 1018 Selection.setSelection(text, start, end); 1019 mFromWebKit = false; 1020 } 1021 1022 /** 1023 * Update the text size according to the size of the focus candidate's text 1024 * size in mWebView. Should only be called from mWebView. 1025 */ 1026 /* package */ void updateTextSize() { 1027 Assert.assertNotNull("updateTextSize should only be called from " 1028 + "mWebView, so mWebView should never be null!", mWebView); 1029 // Note that this is approximately WebView.contentToViewDimension, 1030 // without being rounded. 1031 float size = mWebView.nativeFocusCandidateTextSize() 1032 * mWebView.getScale(); 1033 setTextSize(TypedValue.COMPLEX_UNIT_PX, size); 1034 } 1035 1036 /** 1037 * Set the text to the new string, but use the old selection, making sure 1038 * to keep it within the new string. 1039 * @param text The new text to place in the textfield. 1040 */ 1041 /* package */ void setTextAndKeepSelection(String text) { 1042 Editable edit = getText(); 1043 mPreChange = text; 1044 if (edit.toString().equals(text)) { 1045 return; 1046 } 1047 int selStart = Selection.getSelectionStart(edit); 1048 int selEnd = Selection.getSelectionEnd(edit); 1049 mInSetTextAndKeepSelection = true; 1050 edit.replace(0, edit.length(), text); 1051 int newLength = edit.length(); 1052 if (selStart > newLength) selStart = newLength; 1053 if (selEnd > newLength) selEnd = newLength; 1054 Selection.setSelection(edit, selStart, selEnd); 1055 mInSetTextAndKeepSelection = false; 1056 InputMethodManager imm = InputMethodManager.peekInstance(); 1057 if (imm != null && imm.isActive(this)) { 1058 // Since the text has changed, do not allow the IME to replace the 1059 // existing text as though it were a completion. 1060 imm.restartInput(this); 1061 } 1062 updateCachedTextfield(); 1063 } 1064 1065 /** 1066 * Called by WebView.rebuildWebTextView(). Based on the type of the <input> 1067 * element, set up the WebTextView, its InputType, and IME Options properly. 1068 * @param type int corresponding to enum "Type" defined in CachedInput.h. 1069 * Does not correspond to HTMLInputElement::InputType so this 1070 * is unaffected if that changes, and also because that has no 1071 * type corresponding to textarea (which is its own tag). 1072 */ 1073 /* package */ void setType(int type) { 1074 if (mWebView == null) return; 1075 boolean single = true; 1076 int maxLength = -1; 1077 int inputType = InputType.TYPE_CLASS_TEXT 1078 | InputType.TYPE_TEXT_VARIATION_WEB_EDIT_TEXT; 1079 int imeOptions = EditorInfo.IME_FLAG_NO_EXTRACT_UI 1080 | EditorInfo.IME_FLAG_NO_FULLSCREEN; 1081 if (!mWebView.nativeFocusCandidateIsSpellcheck()) { 1082 inputType |= InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS; 1083 } 1084 if (TEXT_AREA != type 1085 && mWebView.nativeFocusCandidateHasNextTextfield()) { 1086 imeOptions |= EditorInfo.IME_FLAG_NAVIGATE_NEXT; 1087 } 1088 switch (type) { 1089 case NORMAL_TEXT_FIELD: 1090 imeOptions |= EditorInfo.IME_ACTION_GO; 1091 break; 1092 case TEXT_AREA: 1093 single = false; 1094 inputType |= InputType.TYPE_TEXT_FLAG_MULTI_LINE 1095 | InputType.TYPE_TEXT_FLAG_CAP_SENTENCES 1096 | InputType.TYPE_TEXT_FLAG_AUTO_CORRECT; 1097 imeOptions |= EditorInfo.IME_ACTION_NONE; 1098 break; 1099 case PASSWORD: 1100 inputType |= EditorInfo.TYPE_TEXT_VARIATION_WEB_PASSWORD; 1101 imeOptions |= EditorInfo.IME_ACTION_GO; 1102 break; 1103 case SEARCH: 1104 imeOptions |= EditorInfo.IME_ACTION_SEARCH; 1105 break; 1106 case EMAIL: 1107 // inputType needs to be overwritten because of the different text variation. 1108 inputType = InputType.TYPE_CLASS_TEXT 1109 | InputType.TYPE_TEXT_VARIATION_WEB_EMAIL_ADDRESS; 1110 imeOptions |= EditorInfo.IME_ACTION_GO; 1111 break; 1112 case NUMBER: 1113 // inputType needs to be overwritten because of the different class. 1114 inputType = InputType.TYPE_CLASS_NUMBER | InputType.TYPE_NUMBER_VARIATION_NORMAL 1115 | InputType.TYPE_NUMBER_FLAG_SIGNED | InputType.TYPE_NUMBER_FLAG_DECIMAL; 1116 // Number and telephone do not have both a Tab key and an 1117 // action, so set the action to NEXT 1118 imeOptions |= EditorInfo.IME_ACTION_NEXT; 1119 break; 1120 case TELEPHONE: 1121 // inputType needs to be overwritten because of the different class. 1122 inputType = InputType.TYPE_CLASS_PHONE; 1123 imeOptions |= EditorInfo.IME_ACTION_NEXT; 1124 break; 1125 case URL: 1126 // TYPE_TEXT_VARIATION_URI prevents Tab key from showing, so 1127 // exclude it for now. 1128 imeOptions |= EditorInfo.IME_ACTION_GO; 1129 break; 1130 default: 1131 imeOptions |= EditorInfo.IME_ACTION_GO; 1132 break; 1133 } 1134 setHint(null); 1135 setThreshold(1); 1136 boolean autoComplete = false; 1137 if (single) { 1138 mWebView.requestLabel(mWebView.nativeFocusCandidateFramePointer(), 1139 mNodePointer); 1140 maxLength = mWebView.nativeFocusCandidateMaxLength(); 1141 autoComplete = mWebView.nativeFocusCandidateIsAutoComplete(); 1142 if (type != PASSWORD && (mAutoFillable || autoComplete)) { 1143 String name = mWebView.nativeFocusCandidateName(); 1144 if (name != null && name.length() > 0) { 1145 mWebView.requestFormData(name, mNodePointer, mAutoFillable, 1146 autoComplete); 1147 } 1148 } 1149 } 1150 mSingle = single; 1151 setMaxLength(maxLength); 1152 setHorizontallyScrolling(single); 1153 setInputType(inputType); 1154 clearComposingText(); 1155 setImeOptions(imeOptions); 1156 setVisibility(VISIBLE); 1157 if (!autoComplete) { 1158 setAdapterCustom(null); 1159 } 1160 } 1161 1162 /** 1163 * Update the cache to reflect the current text. 1164 */ 1165 /* package */ void updateCachedTextfield() { 1166 mWebView.updateCachedTextfield(getText().toString()); 1167 } 1168 1169 /* package */ void setAutoFillProfileIsSet(boolean autoFillProfileIsSet) { 1170 mAutoFillProfileIsSet = autoFillProfileIsSet; 1171 } 1172 1173 static String urlForAutoCompleteData(String urlString) { 1174 // Remove any fragment or query string. 1175 URL url = null; 1176 try { 1177 url = new URL(urlString); 1178 } catch (MalformedURLException e) { 1179 Log.e(LOGTAG, "Unable to parse URL "+url); 1180 } 1181 1182 return url != null ? url.getProtocol() + "://" + url.getHost() + url.getPath() : null; 1183 } 1184 1185 public void setGravityForRtl(boolean rtl) { 1186 int gravity = rtl ? Gravity.RIGHT : Gravity.LEFT; 1187 gravity |= mSingle ? Gravity.CENTER_VERTICAL : Gravity.TOP; 1188 setGravity(gravity); 1189 } 1190 1191 } 1192