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LatinIME
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Do not re-resume suggestion if it's not needed. 

This is much better interface-wise. It eliminates all blinking
of the line in the practice.

Bug: 8874148
Bug: 8864306
Change-Id: I87754e44784327c2e9c8b162d598d145e20668e8
main
Jean Chalard 2013-06-25 19:26:30 +09:00
parent 8142a7b637
commit f0af452ce2
3 changed files with 133 additions and 1 deletions
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7
java/src/com/android/inputmethod/latin/LatinIME.java
View File

@ -961,7 +961,11 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
// TODO: is it still necessary to test for composingSpan related stuff?
final boolean selectionChangedOrSafeToReset = selectionChanged
|| (!mWordComposer.isComposingWord()) || noComposingSpan;
if (selectionChangedOrSafeToReset) {
final boolean hasOrHadSelection = (oldSelStart != oldSelEnd
|| newSelStart != newSelEnd);
final int moveAmount = newSelStart - oldSelStart;
if (selectionChangedOrSafeToReset && (hasOrHadSelection
|| !mWordComposer.moveCursorByAndReturnIfInsideComposingWord(moveAmount))) {
// If we are composing a word and moving the cursor, we would want to set a
// suggestion span for recorrection to work correctly. Unfortunately, that
// would involve the keyboard committing some new text, which would move the
@ -2535,6 +2539,7 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
}
}
mWordComposer.setComposingWord(typedWord, mKeyboardSwitcher.getKeyboard());
// TODO: this is in chars but the callee expects code points!
mWordComposer.setCursorPositionWithinWord(numberOfCharsInWordBeforeCursor);
mConnection.setComposingRegion(
mLastSelectionStart - numberOfCharsInWordBeforeCursor,

34
java/src/com/android/inputmethod/latin/WordComposer.java
View File

@ -192,6 +192,40 @@ public final class WordComposer {
return mCursorPositionWithinWord != mCodePointSize;
}
/**
* When the cursor is moved by the user, we need to update its position.
* If it falls inside the currently composing word, we don't reset the composition, and
* only update the cursor position.
*
* @param expectedMoveAmount How many java chars to move the cursor. Negative values move
* the cursor backward, positive values move the cursor forward.
* @return true if the cursor is still inside the composing word, false otherwise.
*/
public boolean moveCursorByAndReturnIfInsideComposingWord(final int expectedMoveAmount) {
int actualMoveAmountWithinWord = 0;
int cursorPos = mCursorPositionWithinWord;
if (expectedMoveAmount >= 0) {
// Moving the cursor forward for the expected amount or until the end of the word has
// been reached, whichever comes first.
while (actualMoveAmountWithinWord < expectedMoveAmount && cursorPos < mCodePointSize) {
actualMoveAmountWithinWord += Character.charCount(mPrimaryKeyCodes[cursorPos]);
++cursorPos;
}
} else {
// Moving the cursor backward for the expected amount or until the start of the word
// has been reached, whichever comes first.
while (actualMoveAmountWithinWord > expectedMoveAmount && cursorPos > 0) {
--cursorPos;
actualMoveAmountWithinWord -= Character.charCount(mPrimaryKeyCodes[cursorPos]);
}
}
// If the actual and expected amounts differ, we crossed the start or the end of the word
// so the result would not be inside the composing word.
if (actualMoveAmountWithinWord != expectedMoveAmount) return false;
mCursorPositionWithinWord = cursorPos;
return true;
}
public void setBatchInputPointers(final InputPointers batchPointers) {
mInputPointers.set(batchPointers);
mIsBatchMode = true;

93
tests/src/com/android/inputmethod/latin/WordComposerTests.java Normal file
View File

@ -0,0 +1,93 @@
/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.inputmethod.latin;
import android.test.AndroidTestCase;
import android.test.suitebuilder.annotation.SmallTest;
/**
* Unit tests for WordComposer.
*/
@SmallTest
public class WordComposerTests extends AndroidTestCase {
public void testMoveCursor() {
final WordComposer wc = new WordComposer();
final String STR_WITHIN_BMP = "abcdef";
wc.setComposingWord(STR_WITHIN_BMP, null);
assertEquals(wc.size(),
STR_WITHIN_BMP.codePointCount(0, STR_WITHIN_BMP.length()));
assertFalse(wc.isCursorFrontOrMiddleOfComposingWord());
wc.setCursorPositionWithinWord(2);
assertTrue(wc.isCursorFrontOrMiddleOfComposingWord());
// Move the cursor to after the 'd'
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(2));
assertTrue(wc.isCursorFrontOrMiddleOfComposingWord());
// Move the cursor to after the 'e'
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(1));
assertTrue(wc.isCursorFrontOrMiddleOfComposingWord());
assertEquals(wc.size(), 6);
// Move the cursor to after the 'f'
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(1));
assertFalse(wc.isCursorFrontOrMiddleOfComposingWord());
// Move the cursor past the end of the word
assertFalse(wc.moveCursorByAndReturnIfInsideComposingWord(1));
assertFalse(wc.moveCursorByAndReturnIfInsideComposingWord(15));
// \uD861\uDED7 is 𨛗, a character outside the BMP
final String STR_WITH_SUPPLEMENTARY_CHAR = "abcde\uD861\uDED7fgh";
wc.setComposingWord(STR_WITH_SUPPLEMENTARY_CHAR, null);
assertEquals(wc.size(), STR_WITH_SUPPLEMENTARY_CHAR.codePointCount(0,
STR_WITH_SUPPLEMENTARY_CHAR.length()));
assertFalse(wc.isCursorFrontOrMiddleOfComposingWord());
wc.setCursorPositionWithinWord(3);
assertTrue(wc.isCursorFrontOrMiddleOfComposingWord());
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(6));
assertTrue(wc.isCursorFrontOrMiddleOfComposingWord());
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(1));
assertFalse(wc.isCursorFrontOrMiddleOfComposingWord());
wc.setComposingWord(STR_WITH_SUPPLEMENTARY_CHAR, null);
wc.setCursorPositionWithinWord(3);
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(7));
wc.setComposingWord(STR_WITH_SUPPLEMENTARY_CHAR, null);
wc.setCursorPositionWithinWord(3);
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(7));
wc.setComposingWord(STR_WITH_SUPPLEMENTARY_CHAR, null);
wc.setCursorPositionWithinWord(3);
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(-3));
assertFalse(wc.moveCursorByAndReturnIfInsideComposingWord(-1));
wc.setComposingWord(STR_WITH_SUPPLEMENTARY_CHAR, null);
wc.setCursorPositionWithinWord(3);
assertFalse(wc.moveCursorByAndReturnIfInsideComposingWord(-9));
wc.setComposingWord(STR_WITH_SUPPLEMENTARY_CHAR, null);
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(-10));
wc.setComposingWord(STR_WITH_SUPPLEMENTARY_CHAR, null);
assertFalse(wc.moveCursorByAndReturnIfInsideComposingWord(-11));
wc.setComposingWord(STR_WITH_SUPPLEMENTARY_CHAR, null);
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(0));
wc.setComposingWord(STR_WITH_SUPPLEMENTARY_CHAR, null);
wc.setCursorPositionWithinWord(2);
assertTrue(wc.moveCursorByAndReturnIfInsideComposingWord(0));
}
}