nyancrimew/LatinIME
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Fix a race condition with backspaces

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And add a test to make sure it stays not-broken.

Bug: 7946604
Change-Id: I996da3d5507d591ec25a13fb57434f39843f1df5
This commit is contained in:
Jean Chalard 2013-01-09 18:37:10 +09:00
parent 8315e8168b
commit 516b63db28
2 changed files with 26 additions and 0 deletions
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5
java/src/com/android/inputmethod/latin/LatinIME.java
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@ -1717,6 +1717,11 @@ public final class LatinIME extends InputMethodService implements KeyboardAction
// If there is a selection, remove it.
final int lengthToDelete = mLastSelectionEnd - mLastSelectionStart;
mConnection.setSelection(mLastSelectionEnd, mLastSelectionEnd);
// Reset mLastSelectionEnd to mLastSelectionStart. This is what is supposed to
// happen, and if it's wrong, the next call to onUpdateSelection will correct it,
// but we want to set it right away to avoid it being used with the wrong values
// later (typically, in a subsequent press on backspace).
mLastSelectionEnd = mLastSelectionStart;
mConnection.deleteSurroundingText(lengthToDelete, 0);
} else {
// There is no selection, just delete one character.

21
tests/src/com/android/inputmethod/latin/InputLogicTests.java
View file

@ -102,6 +102,27 @@ public class InputLogicTests extends InputTestsBase {
assertEquals("delete selection", EXPECTED_RESULT, mTextView.getText().toString());
}
public void testDeleteSelectionTwice() {
final String STRING_TO_TYPE = "some text delete me some text";
final int typedLength = STRING_TO_TYPE.length();
final int SELECTION_START = 10;
final int SELECTION_END = 19;
final String EXPECTED_RESULT = "some text some text";
type(STRING_TO_TYPE);
// There is no IMF to call onUpdateSelection for us so we must do it by hand.
// Send once to simulate the cursor actually responding to the move caused by typing.
// This is necessary because LatinIME is bookkeeping to avoid confusing a real cursor
// move with a move triggered by LatinIME inputting stuff.
mLatinIME.onUpdateSelection(0, 0, typedLength, typedLength, -1, -1);
mInputConnection.setSelection(SELECTION_START, SELECTION_END);
// And now we simulate the user actually selecting some text.
mLatinIME.onUpdateSelection(typedLength, typedLength,
SELECTION_START, SELECTION_END, -1, -1);
type(Constants.CODE_DELETE);
type(Constants.CODE_DELETE);
assertEquals("delete selection twice", EXPECTED_RESULT, mTextView.getText().toString());
}
public void testAutoCorrect() {
final String STRING_TO_TYPE = "tgis ";
final String EXPECTED_RESULT = "this ";