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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 package org.chromium.content.browser.input; |
| 6 |
| 7 import android.graphics.Matrix; |
| 8 import android.graphics.RectF; |
| 9 import android.os.Build; |
| 10 import android.text.TextUtils; |
| 11 import android.view.View; |
| 12 import android.view.inputmethod.CursorAnchorInfo; |
| 13 import android.view.inputmethod.InputConnection; |
| 14 |
| 15 import org.chromium.base.CommandLine; |
| 16 import org.chromium.base.VisibleForTesting; |
| 17 import org.chromium.content.browser.RenderCoordinates; |
| 18 import org.chromium.content.common.ContentSwitches; |
| 19 |
| 20 import java.util.Arrays; |
| 21 |
| 22 import javax.annotation.Nonnull; |
| 23 import javax.annotation.Nullable; |
| 24 |
| 25 /* |
| 26 * A state machine interface which receives Chromium internal events to determin
es when to call |
| 27 * {@link InputMethodManager#updateCursorAnchorInfo(View, CursorAnchorInfo)}. Th
is interface is |
| 28 * also used in unit tests to mock out {@link CursorAnchorInfo}, which is availa
ble only in |
| 29 * Android 5.0 (Lollipop) and later. |
| 30 */ |
| 31 final class CursorAnchorInfoController { |
| 32 /** |
| 33 * An interface to mock out {@link View#getLocationOnScreen(int[])} for test
ing. |
| 34 */ |
| 35 public interface ViewDelegate { |
| 36 void getLocationOnScreen(View view, int[] location); |
| 37 } |
| 38 |
| 39 private static final class CursorAnchorInfoWrapperImpl implements CursorAnch
orInfoWrapper { |
| 40 private static final class Builder implements CursorAnchorInfoWrapper.Bu
ilder { |
| 41 private final CursorAnchorInfo.Builder mBuilder = new CursorAnchorIn
fo.Builder(); |
| 42 |
| 43 @Override |
| 44 public CursorAnchorInfoWrapper.Builder setSelectionRange(int newStar
t, int newEnd) { |
| 45 mBuilder.setSelectionRange(newStart, newEnd); |
| 46 return this; |
| 47 } |
| 48 |
| 49 @Override |
| 50 public CursorAnchorInfoWrapper.Builder setComposingText( |
| 51 int composingTextStart, CharSequence composingText) { |
| 52 mBuilder.setComposingText(composingTextStart, composingText); |
| 53 return this; |
| 54 } |
| 55 |
| 56 @Override |
| 57 public CursorAnchorInfoWrapper.Builder setInsertionMarkerLocation( |
| 58 float horizontalPosition, float lineTop, float lineBaseline,
float lineBottom, |
| 59 int flags) { |
| 60 mBuilder.setInsertionMarkerLocation(horizontalPosition, lineTop,
lineBaseline, |
| 61 lineBottom, flags); |
| 62 return this; |
| 63 } |
| 64 |
| 65 @Override |
| 66 public CursorAnchorInfoWrapper.Builder addCharacterBounds( |
| 67 int index, float left, float top, float right, float bottom,
int flags) { |
| 68 mBuilder.addCharacterBounds(index, left, top, right, bottom, fla
gs); |
| 69 return this; |
| 70 } |
| 71 |
| 72 @Override |
| 73 public CursorAnchorInfoWrapper.Builder setMatrix(Matrix matrix) { |
| 74 mBuilder.setMatrix(matrix); |
| 75 return this; |
| 76 } |
| 77 |
| 78 @Override |
| 79 public CursorAnchorInfoWrapper build() { |
| 80 return new CursorAnchorInfoWrapperImpl(mBuilder.build()); |
| 81 } |
| 82 |
| 83 @Override |
| 84 public void reset() { |
| 85 mBuilder.reset(); |
| 86 } |
| 87 } |
| 88 |
| 89 private final CursorAnchorInfo mObj; |
| 90 public CursorAnchorInfoWrapperImpl(CursorAnchorInfo obj) { |
| 91 mObj = obj; |
| 92 } |
| 93 |
| 94 @Override |
| 95 public int getSelectionStart() { |
| 96 return mObj.getSelectionStart(); |
| 97 } |
| 98 |
| 99 @Override |
| 100 public int getSelectionEnd() { |
| 101 return mObj.getSelectionEnd(); |
| 102 } |
| 103 |
| 104 @Override |
| 105 public int getComposingTextStart() { |
| 106 return mObj.getComposingTextStart(); |
| 107 } |
| 108 |
| 109 @Override |
| 110 public CharSequence getComposingText() { |
| 111 return mObj.getComposingText(); |
| 112 } |
| 113 |
| 114 @Override |
| 115 public int getInsertionMarkerFlags() { |
| 116 return mObj.getInsertionMarkerFlags(); |
| 117 } |
| 118 |
| 119 @Override |
| 120 public float getInsertionMarkerHorizontal() { |
| 121 return mObj.getInsertionMarkerHorizontal(); |
| 122 } |
| 123 |
| 124 @Override |
| 125 public float getInsertionMarkerTop() { |
| 126 return mObj.getInsertionMarkerTop(); |
| 127 } |
| 128 |
| 129 @Override |
| 130 public float getInsertionMarkerBaseline() { |
| 131 return mObj.getInsertionMarkerBaseline(); |
| 132 } |
| 133 |
| 134 @Override |
| 135 public float getInsertionMarkerBottom() { |
| 136 return mObj.getInsertionMarkerBottom(); |
| 137 } |
| 138 |
| 139 @Override |
| 140 public RectF getCharacterBounds(int index) { |
| 141 return mObj.getCharacterBounds(index); |
| 142 } |
| 143 |
| 144 @Override |
| 145 public int getCharacterBoundsFlags(int index) { |
| 146 return mObj.getCharacterBoundsFlags(index); |
| 147 } |
| 148 |
| 149 @Override |
| 150 public Matrix getMatrix() { |
| 151 return mObj.getMatrix(); |
| 152 } |
| 153 |
| 154 @Override |
| 155 public Object unwrap() { |
| 156 return mObj; |
| 157 } |
| 158 } |
| 159 |
| 160 @Nullable |
| 161 private CharSequence mText; |
| 162 private int mSelectionStart; |
| 163 private int mSelectionEnd; |
| 164 private int mComposingTextStart; |
| 165 private int mComposingTextEnd; |
| 166 @Nullable |
| 167 private float[] mCompositionCharacterBounds; |
| 168 private boolean mHasInsertionMarker; |
| 169 private boolean mIsInsertionMarkerVisible; |
| 170 private float mInsertionMarkerHorizontal; |
| 171 private float mInsertionMarkerTop; |
| 172 private float mInsertionMarkerBottom; |
| 173 private float mScale; |
| 174 private float mTranslationX; |
| 175 private float mTranslationY; |
| 176 private boolean mIsEditable; |
| 177 private boolean mHasPendingRequest; |
| 178 private boolean mMonitorModeEnabled; |
| 179 private boolean mHasCoordinateInfo; |
| 180 |
| 181 @Nonnull |
| 182 private final CursorAnchorInfoWrapper.Builder mCursorAnchorInfoBuilder; |
| 183 @Nullable |
| 184 private volatile CursorAnchorInfoWrapper mLastCursorAnchorInfo; |
| 185 |
| 186 @Nonnull |
| 187 private final Matrix mMatrix = new Matrix(); |
| 188 @Nonnull |
| 189 private final int[] mViewOrigin = new int[2]; |
| 190 @Nonnull |
| 191 private final ViewDelegate mViewDelegate; |
| 192 |
| 193 @Nullable |
| 194 private InputMethodManagerWrapper mInputMethodManagerWrapper; |
| 195 |
| 196 private static final boolean sIsSupported = isSupportedInit(); |
| 197 |
| 198 /** |
| 199 * @return {@code true} if {@link CursorAnchorInfo} is supported on this dev
ice. |
| 200 */ |
| 201 private static boolean isSupportedInit() { |
| 202 if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) |
| 203 return false; |
| 204 if (CommandLine.getInstance() != null |
| 205 && !CommandLine.getInstance().hasSwitch(ContentSwitches.ENABLE_C
URSOR_ANCHOR_INFO)) |
| 206 return false; |
| 207 return true; |
| 208 } |
| 209 |
| 210 /** |
| 211 * @return {@code true} if {@link CursorAnchorInfo} is supported on this dev
ice. |
| 212 */ |
| 213 public static boolean isSupported() { |
| 214 return sIsSupported; |
| 215 } |
| 216 |
| 217 private CursorAnchorInfoController(InputMethodManagerWrapper inputMethodMana
gerWrapper, |
| 218 CursorAnchorInfoWrapper.Builder builder, |
| 219 ViewDelegate viewDelegate) { |
| 220 mInputMethodManagerWrapper = inputMethodManagerWrapper; |
| 221 mCursorAnchorInfoBuilder = builder; |
| 222 mViewDelegate = viewDelegate; |
| 223 } |
| 224 |
| 225 public static CursorAnchorInfoController create( |
| 226 InputMethodManagerWrapper inputMethodManagerWrapper) { |
| 227 return isSupported() ? new CursorAnchorInfoController(inputMethodManager
Wrapper, |
| 228 new CursorAnchorInfoWrapperImpl.Builder(), new ViewDelegate() { |
| 229 @Override |
| 230 public void getLocationOnScreen(View view, int[] location) { |
| 231 view.getLocationOnScreen(location); |
| 232 } |
| 233 }) : null; |
| 234 } |
| 235 |
| 236 @VisibleForTesting |
| 237 public void setInputMethodManagerWrapper(InputMethodManagerWrapper inputMeth
odManagerWrapper) { |
| 238 mInputMethodManagerWrapper = inputMethodManagerWrapper; |
| 239 } |
| 240 |
| 241 @VisibleForTesting |
| 242 public static CursorAnchorInfoController createForTest( |
| 243 InputMethodManagerWrapper inputMethodManagerWrapper, |
| 244 CursorAnchorInfoWrapper.Builder builder, |
| 245 ViewDelegate viewDelegate) { |
| 246 return new CursorAnchorInfoController(inputMethodManagerWrapper, builder
, viewDelegate); |
| 247 } |
| 248 |
| 249 /** |
| 250 * @return Current composing text (if any). {@code null} otherwise. |
| 251 */ |
| 252 @Nullable |
| 253 public CharSequence getComposingText() { |
| 254 if (mText == null) |
| 255 return null; |
| 256 if (0 <= mComposingTextStart && mComposingTextStart <= mText.length()) |
| 257 return mText.subSequence(mComposingTextStart, mComposingTextEnd); |
| 258 return ""; |
| 259 } |
| 260 |
| 261 /** |
| 262 * Updates text in the focused text area, selection range, and the composing
text range. |
| 263 * @param text Text in the focused text field. |
| 264 * @param composingTextStart Index where the text composition starts. {@code
-1} if there is |
| 265 * no selection. |
| 266 * @param composingTextEnd Index where the text composition ends. {@code -1}
if there is no |
| 267 * selection. |
| 268 * @param selectionStart Index where the text selection starts. {@code -1} i
f there is no |
| 269 * selection. |
| 270 * @param selectionEnd Index where the text selection ends. {@code -1} if th
ere is no |
| 271 * selection. |
| 272 */ |
| 273 public void updateTextAndSelection(CharSequence text, int composingTextStart
, |
| 274 int composingTextEnd, int selectionStart, int selectionEnd) { |
| 275 if (!mIsEditable) |
| 276 return; |
| 277 if (mLastCursorAnchorInfo == null && mMonitorModeEnabled) |
| 278 mHasPendingRequest = true; |
| 279 if (mLastCursorAnchorInfo != null && !mHasPendingRequest) { |
| 280 if (!TextUtils.equals(text, mText) || selectionStart != mSelectionSt
art |
| 281 || selectionEnd != mSelectionEnd || composingTextStart != mC
omposingTextStart |
| 282 || composingTextEnd != mComposingTextEnd) { |
| 283 mLastCursorAnchorInfo = null; |
| 284 if (mMonitorModeEnabled) { |
| 285 mHasPendingRequest = true; |
| 286 } |
| 287 } |
| 288 } |
| 289 mText = text; |
| 290 mSelectionStart = selectionStart; |
| 291 mSelectionEnd = selectionEnd; |
| 292 mComposingTextStart = composingTextStart; |
| 293 mComposingTextEnd = composingTextEnd; |
| 294 } |
| 295 |
| 296 /** |
| 297 * Sets positional information of composing text as an array of character bo
unds. |
| 298 * @param compositionCharacterBounds Array of character bounds in local coor
dinates. |
| 299 */ |
| 300 public void setCompositionCharacterBounds(float[] compositionCharacterBounds
) { |
| 301 if (!mIsEditable) |
| 302 return; |
| 303 if (mLastCursorAnchorInfo == null && mMonitorModeEnabled) |
| 304 mHasPendingRequest = true; |
| 305 if (mLastCursorAnchorInfo != null && !mHasPendingRequest) { |
| 306 if (!Arrays.equals(compositionCharacterBounds, mCompositionCharacter
Bounds)) { |
| 307 mLastCursorAnchorInfo = null; |
| 308 if (mMonitorModeEnabled) { |
| 309 mHasPendingRequest = true; |
| 310 } |
| 311 } |
| 312 } |
| 313 mCompositionCharacterBounds = compositionCharacterBounds; |
| 314 } |
| 315 |
| 316 /** |
| 317 * Sets coordinates system parameters and selection marker information. |
| 318 * @param hasInsertionMarker {@code true} if the insertion marker exists. |
| 319 * @param isInsertionMarkerVisible {@code true} if the insertion insertion m
arker is visible. |
| 320 * @param insertionMarkerHorizontal X coordinate of the top of the first sel
ection marker. |
| 321 * @param insertionMarkerTop Y coordinate of the top of the first selection
marker. |
| 322 * @param insertionMarkerBottom Y coordinate of the bottom of the first sele
ction marker. |
| 323 * @param view The attached view. |
| 324 */ |
| 325 public void onUpdateFrameInfo(@Nonnull RenderCoordinates renderCoordinates, |
| 326 boolean hasInsertionMarker, boolean isInsertionMarkerVisible, |
| 327 float insertionMarkerHorizontal, float insertionMarkerTop, |
| 328 float insertionMarkerBottom, @Nonnull View view) { |
| 329 if (!mIsEditable) |
| 330 return; |
| 331 |
| 332 float scale = |
| 333 renderCoordinates.getPageScaleFactor() * renderCoordinates.getDe
viceScaleFactor(); |
| 334 float translationX; |
| 335 float translationY; |
| 336 // Reuse {@param #mViewOrigin} to avoid object creation, as this method
is supposed to be |
| 337 // called at relatively high rate. |
| 338 mViewDelegate.getLocationOnScreen(view, mViewOrigin); |
| 339 translationX = -renderCoordinates.getScrollX() * scale + mViewOrigin[0]; |
| 340 translationY = -renderCoordinates.getScrollY() * scale |
| 341 + renderCoordinates.getContentOffsetYPix() + mViewOrigin[1]; |
| 342 |
| 343 if (mLastCursorAnchorInfo == null && mMonitorModeEnabled) |
| 344 mHasPendingRequest = true; |
| 345 if (mLastCursorAnchorInfo != null && !mHasPendingRequest) { |
| 346 if (!mHasCoordinateInfo |
| 347 || scale != mScale |
| 348 || translationX != mTranslationX |
| 349 || translationY != mTranslationY |
| 350 || hasInsertionMarker != mHasInsertionMarker |
| 351 || isInsertionMarkerVisible != mIsInsertionMarkerVisible |
| 352 || insertionMarkerHorizontal != mInsertionMarkerHorizontal |
| 353 || insertionMarkerTop != mInsertionMarkerTop |
| 354 || insertionMarkerBottom != mInsertionMarkerBottom) { |
| 355 mLastCursorAnchorInfo = null; |
| 356 if (mMonitorModeEnabled) { |
| 357 mHasPendingRequest = true; |
| 358 } |
| 359 } |
| 360 } |
| 361 |
| 362 mHasInsertionMarker = hasInsertionMarker; |
| 363 mIsInsertionMarkerVisible = isInsertionMarkerVisible; |
| 364 mInsertionMarkerHorizontal = insertionMarkerHorizontal; |
| 365 mInsertionMarkerTop = insertionMarkerTop; |
| 366 mInsertionMarkerBottom = insertionMarkerBottom; |
| 367 mScale = scale; |
| 368 mTranslationX = translationX; |
| 369 mTranslationY = translationY; |
| 370 mHasCoordinateInfo = true; |
| 371 if (mLastCursorAnchorInfo == null && mHasPendingRequest) |
| 372 updateCursorAnchorInfo(); |
| 373 if (mLastCursorAnchorInfo != null && mHasPendingRequest) { |
| 374 if (mInputMethodManagerWrapper != null) { |
| 375 mInputMethodManagerWrapper.updateCursorAnchorInfo(view, mLastCur
sorAnchorInfo); |
| 376 } |
| 377 mHasPendingRequest = false; |
| 378 } |
| 379 } |
| 380 |
| 381 public void focusedNodeChanged(boolean isEditable) { |
| 382 mIsEditable = isEditable; |
| 383 mHasCoordinateInfo = false; |
| 384 mText = null; |
| 385 mSelectionStart = -1; |
| 386 mSelectionEnd = -1; |
| 387 mComposingTextStart = -1; |
| 388 mComposingTextEnd = -1; |
| 389 mCompositionCharacterBounds = null; |
| 390 mHasInsertionMarker = false; |
| 391 mInsertionMarkerHorizontal = Float.NaN; |
| 392 mInsertionMarkerTop = Float.NaN; |
| 393 mInsertionMarkerBottom = Float.NaN; |
| 394 mScale = 1.0f; |
| 395 mTranslationX = 0.0f; |
| 396 mTranslationY = 0.0f; |
| 397 mLastCursorAnchorInfo = null; |
| 398 mCursorAnchorInfoBuilder.reset(); |
| 399 } |
| 400 |
| 401 public boolean onRequestCursorUpdates(int cursorUpdateMode, @Nonnull View vi
ew) { |
| 402 if (!mIsEditable) |
| 403 return false; |
| 404 final int knownRequestCursorUpdatesFlags = |
| 405 InputConnection.CURSOR_UPDATE_MONITOR | InputConnection.CURSOR_U
PDATE_IMMEDIATE; |
| 406 if ((cursorUpdateMode & ~knownRequestCursorUpdatesFlags) != 0) { |
| 407 // Does nothing when at least one unknown bit flag is set. |
| 408 return false; |
| 409 } |
| 410 boolean updateImmediate = |
| 411 (cursorUpdateMode & InputConnection.CURSOR_UPDATE_IMMEDIATE) !=
0; |
| 412 boolean updateMonitor = |
| 413 (cursorUpdateMode & InputConnection.CURSOR_UPDATE_MONITOR) != 0; |
| 414 mMonitorModeEnabled = updateMonitor; |
| 415 if (updateImmediate) { |
| 416 if (mLastCursorAnchorInfo == null && mHasCoordinateInfo) { |
| 417 updateCursorAnchorInfo(); |
| 418 } |
| 419 if (mLastCursorAnchorInfo != null) { |
| 420 if (mInputMethodManagerWrapper != null) { |
| 421 mInputMethodManagerWrapper.updateCursorAnchorInfo(view, mLas
tCursorAnchorInfo); |
| 422 } |
| 423 } else { |
| 424 mHasPendingRequest = true; |
| 425 } |
| 426 } |
| 427 return true; |
| 428 } |
| 429 |
| 430 private void updateCursorAnchorInfo() { |
| 431 synchronized (mCursorAnchorInfoBuilder) { |
| 432 CharSequence composingText = getComposingText(); |
| 433 int composingTextStart = mComposingTextStart; |
| 434 if (composingText != null) { |
| 435 mCursorAnchorInfoBuilder.setComposingText(composingTextStart, co
mposingText); |
| 436 float[] compositionCharacterBounds = mCompositionCharacterBounds
; |
| 437 if (compositionCharacterBounds != null) { |
| 438 int numCharacter = compositionCharacterBounds.length / 4; |
| 439 for (int i = 0; i < numCharacter; ++i) { |
| 440 float left = compositionCharacterBounds[i * 4]; |
| 441 float top = compositionCharacterBounds[i * 4 + 1]; |
| 442 float right = compositionCharacterBounds[i * 4 + 2]; |
| 443 float bottom = compositionCharacterBounds[i * 4 + 3]; |
| 444 int charIndex = composingTextStart + i; |
| 445 mCursorAnchorInfoBuilder.addCharacterBounds(charIndex, l
eft, top, right, |
| 446 bottom, CursorAnchorInfo.FLAG_HAS_VISIBLE_REGION
); |
| 447 } |
| 448 } |
| 449 } |
| 450 mCursorAnchorInfoBuilder.setSelectionRange(mSelectionStart, mSelecti
onEnd); |
| 451 mMatrix.setScale(mScale, mScale); |
| 452 mMatrix.postTranslate(mTranslationX, mTranslationY); |
| 453 mCursorAnchorInfoBuilder.setMatrix(mMatrix); |
| 454 if (mHasInsertionMarker) { |
| 455 mCursorAnchorInfoBuilder.setInsertionMarkerLocation( |
| 456 mInsertionMarkerHorizontal, |
| 457 mInsertionMarkerTop, |
| 458 mInsertionMarkerBottom, |
| 459 mInsertionMarkerBottom, |
| 460 mIsInsertionMarkerVisible ? CursorAnchorInfo.FLAG_HAS_VI
SIBLE_REGION : |
| 461 CursorAnchorInfo.FLAG_HAS_INVISIBLE_REGION); |
| 462 } |
| 463 mLastCursorAnchorInfo = mCursorAnchorInfoBuilder.build(); |
| 464 mCursorAnchorInfoBuilder.reset(); |
| 465 } |
| 466 } |
| 467 } |
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