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Fix an NPE related to absent InputConnection

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Bug: 5035577
Change-Id: I1a11fc475d4a0f692636000d0b0f40bc35427867
This commit is contained in:
Jean Chalard 2011-07-19 18:59:12 +09:00
parent 44861474fb
commit 40f7efc172
2 changed files with 25 additions and 8 deletions
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10
java/src/com/android/inputmethod/latin/EditingUtils.java
View file

@ -33,6 +33,7 @@ public class EditingUtils {
* Number of characters we want to look back in order to identify the previous word
*/
private static final int LOOKBACK_CHARACTER_NUM = 15;
private static final int INVALID_CURSOR_POSITION = -1;
private EditingUtils() {
// Unintentional empty constructor for singleton.
@ -63,10 +64,11 @@ public class EditingUtils {
}
private static int getCursorPosition(InputConnection connection) {
if (null == connection) return INVALID_CURSOR_POSITION;
ExtractedText extracted = connection.getExtractedText(
new ExtractedTextRequest(), 0);
if (extracted == null) {
return -1;
return INVALID_CURSOR_POSITION;
}
return extracted.startOffset + extracted.selectionStart;
}
@ -79,6 +81,7 @@ public class EditingUtils {
* represents the cursor, then "hello " will be returned.
*/
public static String getWordAtCursor(InputConnection connection, String separators) {
// getWordRangeAtCursor returns null if the connection is null
Range r = getWordRangeAtCursor(connection, separators);
return (r == null) ? null : r.mWord;
}
@ -88,6 +91,7 @@ public class EditingUtils {
* getWordAtCursor.
*/
public static void deleteWordAtCursor(InputConnection connection, String separators) {
// getWordRangeAtCursor returns null if the connection is null
Range range = getWordRangeAtCursor(connection, separators);
if (range == null) return;
@ -165,6 +169,7 @@ public class EditingUtils {
public static CharSequence getPreviousWord(InputConnection connection,
String sentenceSeperators) {
//TODO: Should fix this. This could be slow!
if (null == connection) return null;
CharSequence prev = connection.getTextBeforeCursor(LOOKBACK_CHARACTER_NUM, 0);
return getPreviousWord(prev, sentenceSeperators);
}
@ -194,6 +199,7 @@ public class EditingUtils {
}
public static CharSequence getThisWord(InputConnection connection, String sentenceSeperators) {
if (null == connection) return null;
final CharSequence prev = connection.getTextBeforeCursor(LOOKBACK_CHARACTER_NUM, 0);
return getThisWord(prev, sentenceSeperators);
}
@ -256,12 +262,14 @@ public class EditingUtils {
int selStart, int selEnd, String wordSeparators) {
if (selStart == selEnd) {
// There is just a cursor, so get the word at the cursor
// getWordRangeAtCursor returns null if the connection is null
EditingUtils.Range range = getWordRangeAtCursor(ic, wordSeparators);
if (range != null && !TextUtils.isEmpty(range.mWord)) {
return new SelectedWord(selStart - range.mCharsBefore, selEnd + range.mCharsAfter,
range.mWord);
}
} else {
if (null == ic) return null;
// Is the previous character empty or a word separator? If not, return null.
CharSequence charsBefore = ic.getTextBeforeCursor(1, 0);
if (!isWordBoundary(charsBefore, wordSeparators)) {

19
java/src/com/android/inputmethod/latin/LatinIME.java
View file

@ -1514,9 +1514,15 @@ public class LatinIME extends InputMethodServiceCompatWrapper implements Keyboar
final WordComposer wordComposer = mWordComposer;
// TODO: May need a better way of retrieving previous word
CharSequence prevWord = EditingUtils.getPreviousWord(getCurrentInputConnection(),
mSettingsValues.mWordSeparators);
SuggestedWords.Builder builder = mSuggest.getSuggestedWordBuilder(
final InputConnection ic = getCurrentInputConnection();
final CharSequence prevWord;
if (null == ic) {
prevWord = null;
} else {
prevWord = EditingUtils.getPreviousWord(ic, mSettingsValues.mWordSeparators);
}
// getSuggestedWordBuilder handles gracefully a null value of prevWord
final SuggestedWords.Builder builder = mSuggest.getSuggestedWordBuilder(
mKeyboardSwitcher.getKeyboardView(), wordComposer, prevWord);
boolean autoCorrectionAvailable = !mInputTypeNoAutoCorrect && mSuggest.hasAutoCorrection();
@ -1788,13 +1794,16 @@ public class LatinIME extends InputMethodServiceCompatWrapper implements Keyboar
// We don't want to register as bigrams words separated by a separator.
// For example "I will, and you too" : we don't want the pair ("will" "and") to be
// a bigram.
CharSequence prevWord = EditingUtils.getPreviousWord(getCurrentInputConnection(),
mSettingsValues.mWordSeparators);
final InputConnection ic = getCurrentInputConnection();
if (null != ic) {
final CharSequence prevWord =
EditingUtils.getPreviousWord(ic, mSettingsValues.mWordSeparators);
if (!TextUtils.isEmpty(prevWord)) {
mUserBigramDictionary.addBigrams(prevWord.toString(), suggestion.toString());
}
}
}
}
public boolean isCursorTouchingWord() {
InputConnection ic = getCurrentInputConnection();