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Use cached data for getTextBeforeCursor. 

Bug: 8864306
Change-Id: Ia146f711f1de4336d7e3363208ab92eba856f5e1
main
Jean Chalard 2013-07-26 17:06:32 +09:00
parent 38e9802690
commit 8c6537edbd
1 changed files with 33 additions and 20 deletions
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53
java/src/com/android/inputmethod/latin/RichInputConnection.java
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@ -246,22 +246,35 @@ public final class RichInputConnection {
mCommittedTextBeforeComposingText.length()); mCommittedTextBeforeComposingText.length());
} }
public CharSequence getTextBeforeCursor(final int i, final int j) { public CharSequence getTextBeforeCursor(final int n, final int flags) {
// TODO: use mCommittedTextBeforeComposingText if possible to improve performance final int cachedLength =
mCommittedTextBeforeComposingText.length() + mComposingText.length();
// If we have enough characters to satisfy the request, or if we have all characters in
// the text field, then we can return the cached version right away.
if (cachedLength >= n || cachedLength >= mCurrentCursorPosition) {
final StringBuilder s = new StringBuilder(mCommittedTextBeforeComposingText);
s.append(mComposingText);
if (s.length() > n) {
s.delete(0, s.length() - n);
}
return s;
}
mIC = mParent.getCurrentInputConnection(); mIC = mParent.getCurrentInputConnection();
if (null != mIC) return mIC.getTextBeforeCursor(i, j); if (null != mIC) {
return mIC.getTextBeforeCursor(n, flags);
}
return null; return null;
} }
public CharSequence getTextAfterCursor(final int i, final int j) { public CharSequence getTextAfterCursor(final int n, final int flags) {
mIC = mParent.getCurrentInputConnection(); mIC = mParent.getCurrentInputConnection();
if (null != mIC) return mIC.getTextAfterCursor(i, j); if (null != mIC) return mIC.getTextAfterCursor(n, flags);
return null; return null;
} }
public void deleteSurroundingText(final int i, final int j) { public void deleteSurroundingText(final int beforeLength, final int afterLength) {
if (DEBUG_BATCH_NESTING) checkBatchEdit(); if (DEBUG_BATCH_NESTING) checkBatchEdit();
final int remainingChars = mComposingText.length() - i; final int remainingChars = mComposingText.length() - beforeLength;
if (remainingChars >= 0) { if (remainingChars >= 0) {
mComposingText.setLength(remainingChars); mComposingText.setLength(remainingChars);
} else { } else {
@ -271,15 +284,15 @@ public final class RichInputConnection {
+ remainingChars, 0); + remainingChars, 0);
mCommittedTextBeforeComposingText.setLength(len); mCommittedTextBeforeComposingText.setLength(len);
} }
if (mCurrentCursorPosition > i) { if (mCurrentCursorPosition > beforeLength) {
mCurrentCursorPosition -= i; mCurrentCursorPosition -= beforeLength;
} else { } else {
mCurrentCursorPosition = 0; mCurrentCursorPosition = 0;
} }
if (null != mIC) { if (null != mIC) {
mIC.deleteSurroundingText(i, j); mIC.deleteSurroundingText(beforeLength, afterLength);
if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) { if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
ResearchLogger.richInputConnection_deleteSurroundingText(i, j); ResearchLogger.richInputConnection_deleteSurroundingText(beforeLength, afterLength);
} }
} }
if (DEBUG_PREVIOUS_TEXT) checkConsistencyForDebug(); if (DEBUG_PREVIOUS_TEXT) checkConsistencyForDebug();
@ -362,7 +375,7 @@ public final class RichInputConnection {
} }
} }
public void setComposingText(final CharSequence text, final int i) { public void setComposingText(final CharSequence text, final int newCursorPosition) {
if (DEBUG_BATCH_NESTING) checkBatchEdit(); if (DEBUG_BATCH_NESTING) checkBatchEdit();
if (DEBUG_PREVIOUS_TEXT) checkConsistencyForDebug(); if (DEBUG_PREVIOUS_TEXT) checkConsistencyForDebug();
mCurrentCursorPosition += text.length() - mComposingText.length(); mCurrentCursorPosition += text.length() - mComposingText.length();
@ -370,24 +383,24 @@ public final class RichInputConnection {
mComposingText.append(text); mComposingText.append(text);
// TODO: support values of i != 1. At this time, this is never called with i != 1. // TODO: support values of i != 1. At this time, this is never called with i != 1.
if (null != mIC) { if (null != mIC) {
mIC.setComposingText(text, i); mIC.setComposingText(text, newCursorPosition);
if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) { if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
ResearchLogger.richInputConnection_setComposingText(text, i); ResearchLogger.richInputConnection_setComposingText(text, newCursorPosition);
} }
} }
if (DEBUG_PREVIOUS_TEXT) checkConsistencyForDebug(); if (DEBUG_PREVIOUS_TEXT) checkConsistencyForDebug();
} }
public void setSelection(final int from, final int to) { public void setSelection(final int start, final int end) {
if (DEBUG_BATCH_NESTING) checkBatchEdit(); if (DEBUG_BATCH_NESTING) checkBatchEdit();
if (DEBUG_PREVIOUS_TEXT) checkConsistencyForDebug(); if (DEBUG_PREVIOUS_TEXT) checkConsistencyForDebug();
if (null != mIC) { if (null != mIC) {
mIC.setSelection(from, to); mIC.setSelection(start, end);
if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) { if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
ResearchLogger.richInputConnection_setSelection(from, to); ResearchLogger.richInputConnection_setSelection(start, end);
} }
} }
mCurrentCursorPosition = from; mCurrentCursorPosition = start;
mCommittedTextBeforeComposingText.setLength(0); mCommittedTextBeforeComposingText.setLength(0);
mCommittedTextBeforeComposingText.append(getTextBeforeCursor(DEFAULT_TEXT_CACHE_SIZE, 0)); mCommittedTextBeforeComposingText.append(getTextBeforeCursor(DEFAULT_TEXT_CACHE_SIZE, 0));
} }
@ -425,7 +438,7 @@ public final class RichInputConnection {
public String getNthPreviousWord(final String sentenceSeperators, final int n) { public String getNthPreviousWord(final String sentenceSeperators, final int n) {
mIC = mParent.getCurrentInputConnection(); mIC = mParent.getCurrentInputConnection();
if (null == mIC) return null; if (null == mIC) return null;
final CharSequence prev = mIC.getTextBeforeCursor(LOOKBACK_CHARACTER_NUM, 0); final CharSequence prev = getTextBeforeCursor(LOOKBACK_CHARACTER_NUM, 0);
if (DEBUG_PREVIOUS_TEXT && null != prev) { if (DEBUG_PREVIOUS_TEXT && null != prev) {
final int checkLength = LOOKBACK_CHARACTER_NUM - 1; final int checkLength = LOOKBACK_CHARACTER_NUM - 1;
final String reference = prev.length() <= checkLength ? prev.toString() final String reference = prev.length() <= checkLength ? prev.toString()
@ -630,7 +643,7 @@ public final class RichInputConnection {
// be needed, but it's there just in case something went wrong. // be needed, but it's there just in case something went wrong.
final CharSequence textBeforeCursor = getTextBeforeCursor(2, 0); final CharSequence textBeforeCursor = getTextBeforeCursor(2, 0);
final String periodSpace = ". "; final String periodSpace = ". ";
if (!periodSpace.equals(textBeforeCursor)) { if (!TextUtils.equals(periodSpace, textBeforeCursor)) {
// Theoretically we should not be coming here if there isn't ". " before the // Theoretically we should not be coming here if there isn't ". " before the
// cursor, but the application may be changing the text while we are typing, so // cursor, but the application may be changing the text while we are typing, so
// anything goes. We should not crash. // anything goes. We should not crash.