/**
* This method works around the issue crbug.com/373934 where Blink does not cancel the composition
* when we send a commit with the empty text.
*
* <p>TODO(aurimas) Remove this once crbug.com/373934 is fixed.
*
* @param text Text that software keyboard requested to commit.
* @return Whether the workaround was performed.
*/
private boolean maybePerformEmptyCompositionWorkaround(CharSequence text) {
int selectionStart = Selection.getSelectionStart(mEditable);
int selectionEnd = Selection.getSelectionEnd(mEditable);
int compositionStart = getComposingSpanStart(mEditable);
int compositionEnd = getComposingSpanEnd(mEditable);
if (TextUtils.isEmpty(text)
&& (selectionStart == selectionEnd)
&& compositionStart != INVALID_COMPOSITION
&& compositionEnd != INVALID_COMPOSITION) {
beginBatchEdit();
finishComposingText();
int selection = Selection.getSelectionStart(mEditable);
deleteSurroundingText(selection - compositionStart, selection - compositionEnd);
endBatchEdit();
return true;
}
return false;
}
/** @see BaseInputConnection#sendKeyEvent(android.view.KeyEvent) */
@Override
public boolean sendKeyEvent(KeyEvent event) {
if (DEBUG) {
Log.w(
TAG,
"sendKeyEvent ["
+ event.getAction()
+ "] ["
+ event.getKeyCode()
+ "] ["
+ event.getUnicodeChar()
+ "]");
}
int action = event.getAction();
int keycode = event.getKeyCode();
int unicodeChar = event.getUnicodeChar();
// If this isn't a KeyDown event, no need to update composition state; just pass the key
// event through and return. But note that some keys, such as enter, may actually be
// handled on ACTION_UP in Blink.
if (action != KeyEvent.ACTION_DOWN) {
mImeAdapter.translateAndSendNativeEvents(event);
return true;
}
// If this is backspace/del or if the key has a character representation,
// need to update the underlying Editable (i.e. the local representation of the text
// being edited). Some IMEs like Jellybean stock IME and Samsung IME mix in delete
// KeyPress events instead of calling deleteSurroundingText.
if (keycode == KeyEvent.KEYCODE_DEL) {
deleteSurroundingTextImpl(1, 0, true);
} else if (keycode == KeyEvent.KEYCODE_FORWARD_DEL) {
deleteSurroundingTextImpl(0, 1, true);
} else if (keycode == KeyEvent.KEYCODE_ENTER) {
// Finish text composition when pressing enter, as that may submit a form field.
// TODO(aurimas): remove this workaround when crbug.com/278584 is fixed.
finishComposingText();
} else if ((unicodeChar & KeyCharacterMap.COMBINING_ACCENT) != 0) {
// Store a pending accent character and make it the current composition.
int pendingAccent = unicodeChar & KeyCharacterMap.COMBINING_ACCENT_MASK;
StringBuilder builder = new StringBuilder();
builder.appendCodePoint(pendingAccent);
setComposingText(builder.toString(), 1);
mPendingAccent = pendingAccent;
return true;
} else if (mPendingAccent != 0 && unicodeChar != 0) {
int combined = KeyEvent.getDeadChar(mPendingAccent, unicodeChar);
if (combined != 0) {
StringBuilder builder = new StringBuilder();
builder.appendCodePoint(combined);
commitText(builder.toString(), 1);
return true;
}
// Noncombinable character; commit the accent character and fall through to sending
// the key event for the character afterwards.
finishComposingText();
}
replaceSelectionWithUnicodeChar(unicodeChar);
mImeAdapter.translateAndSendNativeEvents(event);
return true;
}
private boolean deleteSurroundingTextImpl(
int beforeLength, int afterLength, boolean fromPhysicalKey) {
if (DEBUG) {
Log.w(
TAG,
"deleteSurroundingText ["
+ beforeLength
+ " "
+ afterLength
+ " "
+ fromPhysicalKey
+ "]");
}
if (mPendingAccent != 0) {
finishComposingText();
}
int originalBeforeLength = beforeLength;
int originalAfterLength = afterLength;
int selectionStart = Selection.getSelectionStart(mEditable);
int selectionEnd = Selection.getSelectionEnd(mEditable);
int availableBefore = selectionStart;
int availableAfter = mEditable.length() - selectionEnd;
beforeLength = Math.min(beforeLength, availableBefore);
afterLength = Math.min(afterLength, availableAfter);
// Adjust these values even before calling super.deleteSurroundingText() to be consistent
// with the super class.
if (isIndexBetweenUtf16SurrogatePair(mEditable, selectionStart - beforeLength)) {
beforeLength += 1;
}
if (isIndexBetweenUtf16SurrogatePair(mEditable, selectionEnd + afterLength)) {
afterLength += 1;
}
super.deleteSurroundingText(beforeLength, afterLength);
updateSelectionIfRequired();
// If this was called due to a physical key, no need to generate a key event here as
// the caller will take care of forwarding the original.
if (fromPhysicalKey) {
return true;
}
// For single-char deletion calls |ImeAdapter.sendKeyEventWithKeyCode| with the real key
// code. For multi-character deletion, executes deletion by calling
// |ImeAdapter.deleteSurroundingText| and sends synthetic key events with a dummy key code.
int keyCode = KeyEvent.KEYCODE_UNKNOWN;
if (originalBeforeLength == 1 && originalAfterLength == 0) {
keyCode = KeyEvent.KEYCODE_DEL;
} else if (originalBeforeLength == 0 && originalAfterLength == 1) {
keyCode = KeyEvent.KEYCODE_FORWARD_DEL;
}
boolean result = true;
if (keyCode == KeyEvent.KEYCODE_UNKNOWN) {
result =
mImeAdapter.sendSyntheticKeyEvent(
WebInputEventType.RawKeyDown, SystemClock.uptimeMillis(), keyCode, 0, 0);
result &= mImeAdapter.deleteSurroundingText(beforeLength, afterLength);
result &=
mImeAdapter.sendSyntheticKeyEvent(
WebInputEventType.KeyUp, SystemClock.uptimeMillis(), keyCode, 0, 0);
} else {
mImeAdapter.sendKeyEventWithKeyCode(
keyCode, KeyEvent.FLAG_SOFT_KEYBOARD | KeyEvent.FLAG_KEEP_TOUCH_MODE);
}
return result;
}