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Ignore spans that are not the right size.

Browse source 
Bug: 8839763
Bug: 8862327
Change-Id: I5d49c86edcbc0fc1b2b147856437cfbadd678377
This commit is contained in:
Jean Chalard 2013-06-24 19:43:03 +09:00
parent a690f3bc40
commit 2f7f6257b6
3 changed files with 193 additions and 19 deletions
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25
java/src/com/android/inputmethod/latin/LatinIME.java
View file

@ -43,7 +43,6 @@ import android.os.Message;
import android.os.SystemClock;
import android.preference.PreferenceManager;
import android.text.InputType;
import android.text.Spanned;
import android.text.TextUtils;
import android.text.style.SuggestionSpan;
import android.util.Log;
@ -2522,21 +2521,15 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
final int numberOfCharsInWordBeforeCursor = range.getNumberOfCharsInWordBeforeCursor();
if (numberOfCharsInWordBeforeCursor > mLastSelectionStart) return;
final ArrayList<SuggestedWordInfo> suggestions = CollectionUtils.newArrayList();
final CharSequence word = range.mWord;
final String typedWord = word.toString();
if (word instanceof Spanned) {
final Spanned spanned = (Spanned)word;
int i = 0;
for (Object object : spanned.getSpans(0, spanned.length(),
SuggestionSpan.class)) {
SuggestionSpan span = (SuggestionSpan)object;
for (String s : span.getSuggestions()) {
++i;
if (!TextUtils.equals(s, typedWord)) {
suggestions.add(new SuggestedWordInfo(s,
SuggestionStripView.MAX_SUGGESTIONS - i,
SuggestedWordInfo.KIND_RESUMED, Dictionary.TYPE_RESUMED));
}
final String typedWord = range.mWord.toString();
int i = 0;
for (final SuggestionSpan span : range.getSuggestionSpansAtWord()) {
for (final String s : span.getSuggestions()) {
++i;
if (!TextUtils.equals(s, typedWord)) {
suggestions.add(new SuggestedWordInfo(s,
SuggestionStripView.MAX_SUGGESTIONS - i,
SuggestedWordInfo.KIND_RESUMED, Dictionary.TYPE_RESUMED));
}
}
}

63
java/src/com/android/inputmethod/latin/RichInputConnection.java
View file

@ -17,7 +17,9 @@
package com.android.inputmethod.latin;
import android.inputmethodservice.InputMethodService;
import android.text.Spanned;
import android.text.TextUtils;
import android.text.style.SuggestionSpan;
import android.util.Log;
import android.view.KeyEvent;
import android.view.inputmethod.CompletionInfo;
@ -32,6 +34,7 @@ import com.android.inputmethod.latin.utils.DebugLogUtils;
import com.android.inputmethod.latin.utils.StringUtils;
import com.android.inputmethod.research.ResearchLogger;
import java.util.Arrays;
import java.util.Locale;
import java.util.regex.Pattern;
@ -457,6 +460,66 @@ public final class RichInputConnection {
return mWordAtCursorEndIndex - mCursorIndex;
}
/**
* Gets the suggestion spans that are put squarely on the word, with the exact start
* and end of the span matching the boundaries of the word.
* @return the list of spans.
*/
public SuggestionSpan[] getSuggestionSpansAtWord() {
if (!(mTextAtCursor instanceof Spanned && mWord instanceof Spanned)) {
return new SuggestionSpan[0];
}
final Spanned text = (Spanned)mTextAtCursor;
// Note: it's fine to pass indices negative or greater than the length of the string
// to the #getSpans() method. The reason we need to get from -1 to +1 is that, the
// spans were cut at the cursor position, and #getSpans(start, end) does not return
// spans that end at `start' or begin at `end'. Consider the following case:
// this| is (The | symbolizes the cursor position
// ---- ---
// In this case, the cursor is in position 4, so the 0~7 span has been split into
// a 0~4 part and a 4~7 part.
// If we called #getSpans(0, 4) in this case, we would only get the part from 0 to 4
// of the span, and not the part from 4 to 7, so we would not realize the span actually
// extends from 0 to 7. But if we call #getSpans(-1, 5) we'll get both the 0~4 and
// the 4~7 spans and we can merge them accordingly.
// Any span starting more than 1 char away from the word boundaries in any direction
// does not touch the word, so we don't need to consider it. That's why requesting
// -1 ~ +1 is enough.
// Of course this is only relevant if the cursor is at one end of the word. If it's
// in the middle, the -1 and +1 are not necessary, but they are harmless.
final SuggestionSpan[] spans = text.getSpans(mWordAtCursorStartIndex - 1,
mWordAtCursorEndIndex + 1, SuggestionSpan.class);
int readIndex = 0;
int writeIndex = 0;
for (; readIndex < spans.length; ++readIndex) {
final SuggestionSpan span = spans[readIndex];
// The span may be null, as we null them when we find duplicates. Cf a few lines
// down.
if (null == span) continue;
// Tentative span start and end. This may be modified later if we realize the
// same span is also applied to other parts of the string.
int spanStart = text.getSpanStart(span);
int spanEnd = text.getSpanEnd(span);
for (int i = readIndex + 1; i < spans.length; ++i) {
if (span.equals(spans[i])) {
// We found the same span somewhere else. Read the new extent of this
// span, and adjust our values accordingly.
spanStart = Math.min(spanStart, text.getSpanStart(spans[i]));
spanEnd = Math.max(spanEnd, text.getSpanEnd(spans[i]));
// ...and mark the span as processed.
spans[i] = null;
}
}
if (spanStart == mWordAtCursorStartIndex && spanEnd == mWordAtCursorEndIndex) {
// If the span does not start and stop here, we ignore it. It probably extends
// past the start or end of the word, as happens in missing space correction
// or EasyEditSpans put by voice input.
spans[writeIndex++] = spans[readIndex];
}
}
return writeIndex == readIndex ? spans : Arrays.copyOfRange(spans, 0, writeIndex);
}
public Range(final CharSequence textAtCursor, final int wordAtCursorStartIndex,
final int wordAtCursorEndIndex, final int cursorIndex) {
if (wordAtCursorStartIndex < 0 || cursorIndex < wordAtCursorStartIndex

124
tests/src/com/android/inputmethod/latin/RichInputConnectionTests.java → tests/src/com/android/inputmethod/latin/RichInputConnectionAndTextRangeTests.java
View file

@ -17,9 +17,14 @@
package com.android.inputmethod.latin;
import android.inputmethodservice.InputMethodService;
import android.os.Parcel;
import android.test.AndroidTestCase;
import android.test.MoreAsserts;
import android.test.suitebuilder.annotation.SmallTest;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.TextUtils;
import android.text.style.SuggestionSpan;
import android.view.inputmethod.ExtractedText;
import android.view.inputmethod.ExtractedTextRequest;
import android.view.inputmethod.InputConnection;
@ -27,8 +32,10 @@ import android.view.inputmethod.InputConnectionWrapper;
import com.android.inputmethod.latin.RichInputConnection.Range;
import java.util.Locale;
@SmallTest
public class RichInputConnectionTests extends AndroidTestCase {
public class RichInputConnectionAndTextRangeTests extends AndroidTestCase {
// The following is meant to be a reasonable default for
// the "word_separators" resource.
@ -40,10 +47,30 @@ public class RichInputConnectionTests extends AndroidTestCase {
}
private class MockConnection extends InputConnectionWrapper {
final String mTextBefore;
final String mTextAfter;
final CharSequence mTextBefore;
final CharSequence mTextAfter;
final ExtractedText mExtractedText;
public MockConnection(final CharSequence text, final int cursorPosition) {
super(null, false);
// Interaction of spans with Parcels is completely non-trivial, but in the actual case
// the CharSequences do go through Parcels because they go through IPC. There
// are some significant differences between the behavior of Spanned objects that
// have and that have not gone through parceling, so it's much easier to simulate
// the environment with Parcels than try to emulate things by hand.
final Parcel p = Parcel.obtain();
TextUtils.writeToParcel(text.subSequence(0, cursorPosition), p, 0 /* flags */);
TextUtils.writeToParcel(text.subSequence(cursorPosition, text.length()), p,
0 /* flags */);
final byte[] marshalled = p.marshall();
p.unmarshall(marshalled, 0, marshalled.length);
p.setDataPosition(0);
mTextBefore = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(p);
mTextAfter = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(p);
mExtractedText = null;
p.recycle();
}
public MockConnection(String textBefore, String textAfter, ExtractedText extractedText) {
super(null, false);
mTextBefore = textBefore;
@ -191,4 +218,95 @@ public class RichInputConnectionTests extends AndroidTestCase {
ic.endBatchEdit();
assertTrue(TextUtils.equals("word", r.mWord));
}
/**
* Test logic in getting the word range at the cursor.
*/
public void testGetSuggestionSpansAtWord() {
helpTestGetSuggestionSpansAtWord(10);
helpTestGetSuggestionSpansAtWord(12);
helpTestGetSuggestionSpansAtWord(15);
helpTestGetSuggestionSpansAtWord(16);
}
private void helpTestGetSuggestionSpansAtWord(final int cursorPos) {
final MockInputMethodService mockInputMethodService = new MockInputMethodService();
final RichInputConnection ic = new RichInputConnection(mockInputMethodService);
final String[] SUGGESTIONS1 = { "swing", "strong" };
final String[] SUGGESTIONS2 = { "storing", "strung" };
// Test the usual case.
SpannableString text = new SpannableString("This is a string for test");
text.setSpan(new SuggestionSpan(Locale.ENGLISH, SUGGESTIONS1, 0 /* flags */),
10 /* start */, 16 /* end */, 0 /* flags */);
mockInputMethodService.setInputConnection(new MockConnection(text, cursorPos));
Range r;
SuggestionSpan[] suggestions;
r = ic.getWordRangeAtCursor(" ", 0);
suggestions = r.getSuggestionSpansAtWord();
assertEquals(suggestions.length, 1);
MoreAsserts.assertEquals(suggestions[0].getSuggestions(), SUGGESTIONS1);
// Test the case with 2 suggestion spans in the same place.
text = new SpannableString("This is a string for test");
text.setSpan(new SuggestionSpan(Locale.ENGLISH, SUGGESTIONS1, 0 /* flags */),
10 /* start */, 16 /* end */, 0 /* flags */);
text.setSpan(new SuggestionSpan(Locale.ENGLISH, SUGGESTIONS2, 0 /* flags */),
10 /* start */, 16 /* end */, 0 /* flags */);
mockInputMethodService.setInputConnection(new MockConnection(text, cursorPos));
r = ic.getWordRangeAtCursor(" ", 0);
suggestions = r.getSuggestionSpansAtWord();
assertEquals(suggestions.length, 2);
MoreAsserts.assertEquals(suggestions[0].getSuggestions(), SUGGESTIONS1);
MoreAsserts.assertEquals(suggestions[1].getSuggestions(), SUGGESTIONS2);
// Test a case with overlapping spans, 2nd extending past the start of the word
text = new SpannableString("This is a string for test");
text.setSpan(new SuggestionSpan(Locale.ENGLISH, SUGGESTIONS1, 0 /* flags */),
10 /* start */, 16 /* end */, 0 /* flags */);
text.setSpan(new SuggestionSpan(Locale.ENGLISH, SUGGESTIONS2, 0 /* flags */),
5 /* start */, 16 /* end */, 0 /* flags */);
mockInputMethodService.setInputConnection(new MockConnection(text, cursorPos));
r = ic.getWordRangeAtCursor(" ", 0);
suggestions = r.getSuggestionSpansAtWord();
assertEquals(suggestions.length, 1);
MoreAsserts.assertEquals(suggestions[0].getSuggestions(), SUGGESTIONS1);
// Test a case with overlapping spans, 2nd extending past the end of the word
text = new SpannableString("This is a string for test");
text.setSpan(new SuggestionSpan(Locale.ENGLISH, SUGGESTIONS1, 0 /* flags */),
10 /* start */, 16 /* end */, 0 /* flags */);
text.setSpan(new SuggestionSpan(Locale.ENGLISH, SUGGESTIONS2, 0 /* flags */),
10 /* start */, 20 /* end */, 0 /* flags */);
mockInputMethodService.setInputConnection(new MockConnection(text, cursorPos));
r = ic.getWordRangeAtCursor(" ", 0);
suggestions = r.getSuggestionSpansAtWord();
assertEquals(suggestions.length, 1);
MoreAsserts.assertEquals(suggestions[0].getSuggestions(), SUGGESTIONS1);
// Test a case with overlapping spans, 2nd extending past both ends of the word
text = new SpannableString("This is a string for test");
text.setSpan(new SuggestionSpan(Locale.ENGLISH, SUGGESTIONS1, 0 /* flags */),
10 /* start */, 16 /* end */, 0 /* flags */);
text.setSpan(new SuggestionSpan(Locale.ENGLISH, SUGGESTIONS2, 0 /* flags */),
5 /* start */, 20 /* end */, 0 /* flags */);
mockInputMethodService.setInputConnection(new MockConnection(text, cursorPos));
r = ic.getWordRangeAtCursor(" ", 0);
suggestions = r.getSuggestionSpansAtWord();
assertEquals(suggestions.length, 1);
MoreAsserts.assertEquals(suggestions[0].getSuggestions(), SUGGESTIONS1);
// Test a case with overlapping spans, none right on the word
text = new SpannableString("This is a string for test");
text.setSpan(new SuggestionSpan(Locale.ENGLISH, SUGGESTIONS1, 0 /* flags */),
5 /* start */, 16 /* end */, 0 /* flags */);
text.setSpan(new SuggestionSpan(Locale.ENGLISH, SUGGESTIONS2, 0 /* flags */),
5 /* start */, 20 /* end */, 0 /* flags */);
mockInputMethodService.setInputConnection(new MockConnection(text, cursorPos));
r = ic.getWordRangeAtCursor(" ", 0);
suggestions = r.getSuggestionSpansAtWord();
assertEquals(suggestions.length, 0);
}
}