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am 3d68b066: Copy only the spans we are interested in.

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* commit '3d68b066626d7e58cbe2853cd186b1ad75b90259':
  Copy only the spans we are interested in.
This commit is contained in:
Jean Chalard 2013-09-24 03:14:57 -07:00 committed by Android Git Automerger
commit 821bff9202
3 changed files with 129 additions and 2 deletions
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7
java/src/com/android/inputmethod/latin/RichInputConnection.java
View file

@ -607,8 +607,11 @@ public final class RichInputConnection {
}
}
return new TextRange(TextUtils.concat(before, after), startIndexInBefore,
before.length() + endIndexInAfter, before.length());
// We don't use TextUtils#concat because it copies all spans without respect to their
// nature. If the text includes a PARAGRAPH span and it has been split, then
// TextUtils#concat will crash when it tries to concat both sides of it.
return new TextRange(StringUtils.concatWithNonParagraphSuggestionSpansOnly(before, after),
startIndexInBefore, before.length() + endIndexInAfter, before.length());
}
public boolean isCursorTouchingWord(final SettingsValues settingsValues) {

89
java/src/com/android/inputmethod/latin/utils/StringUtils.java
View file

@ -20,7 +20,12 @@ import com.android.inputmethod.annotations.UsedForTesting;
import com.android.inputmethod.latin.Constants;
import com.android.inputmethod.latin.settings.SettingsValues;
import android.text.Spannable;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.SpannedString;
import android.text.TextUtils;
import android.text.style.SuggestionSpan;
import android.util.JsonReader;
import android.util.JsonWriter;
import android.util.Log;
@ -462,4 +467,88 @@ public final class StringUtils {
}
return "";
}
/**
* Copies the spans from the region <code>start...end</code> in
* <code>source</code> to the region
* <code>destoff...destoff+end-start</code> in <code>dest</code>.
* Spans in <code>source</code> that begin before <code>start</code>
* or end after <code>end</code> but overlap this range are trimmed
* as if they began at <code>start</code> or ended at <code>end</code>.
* Only SuggestionSpans that don't have the SPAN_PARAGRAPH span are copied.
*
* This code is almost entirely taken from {@link TextUtils#copySpansFrom}, except for the
* kind of span that is copied.
*
* @throws IndexOutOfBoundsException if any of the copied spans
* are out of range in <code>dest</code>.
*/
public static void copyNonParagraphSuggestionSpansFrom(Spanned source, int start, int end,
Spannable dest, int destoff) {
Object[] spans = source.getSpans(start, end, SuggestionSpan.class);
for (int i = 0; i < spans.length; i++) {
int fl = source.getSpanFlags(spans[i]);
if (0 != (fl & Spannable.SPAN_PARAGRAPH)) continue;
int st = source.getSpanStart(spans[i]);
int en = source.getSpanEnd(spans[i]);
if (st < start)
st = start;
if (en > end)
en = end;
dest.setSpan(spans[i], st - start + destoff, en - start + destoff,
fl);
}
}
/**
* Returns a CharSequence concatenating the specified CharSequences, retaining their
* SuggestionSpans that don't have the PARAGRAPH flag, but not other spans.
*
* This code is almost entirely taken from {@link TextUtils#concat(CharSequence...)}, except
* it calls copyNonParagraphSuggestionSpansFrom instead of {@link TextUtils#copySpansFrom}.
*/
public static CharSequence concatWithNonParagraphSuggestionSpansOnly(CharSequence... text) {
if (text.length == 0) {
return "";
}
if (text.length == 1) {
return text[0];
}
boolean spanned = false;
for (int i = 0; i < text.length; i++) {
if (text[i] instanceof Spanned) {
spanned = true;
break;
}
}
StringBuilder sb = new StringBuilder();
for (int i = 0; i < text.length; i++) {
sb.append(text[i]);
}
if (!spanned) {
return sb.toString();
}
SpannableString ss = new SpannableString(sb);
int off = 0;
for (int i = 0; i < text.length; i++) {
int len = text[i].length();
if (text[i] instanceof Spanned) {
copyNonParagraphSuggestionSpansFrom((Spanned) text[i], 0, len, ss, off);
}
off += len;
}
return new SpannedString(ss);
}
}

35
tests/src/com/android/inputmethod/latin/utils/StringUtilsTests.java
View file

@ -20,6 +20,11 @@ import com.android.inputmethod.latin.settings.SettingsValues;
import android.test.AndroidTestCase;
import android.test.suitebuilder.annotation.SmallTest;
import android.text.style.SuggestionSpan;
import android.text.style.URLSpan;
import android.text.SpannableStringBuilder;
import android.text.Spannable;
import android.text.Spanned;
import java.util.Arrays;
import java.util.List;
@ -280,4 +285,34 @@ public class StringUtilsTests extends AndroidTestCase {
assertEquals(objs[i], newObjArray.get(i));
}
}
public void testConcatWithSuggestionSpansOnly() {
SpannableStringBuilder s = new SpannableStringBuilder("test string\ntest string\n"
+ "test string\ntest string\ntest string\ntest string\ntest string\ntest string\n"
+ "test string\ntest string\n");
final int N = 10;
for (int i = 0; i < N; ++i) {
// Put a PARAGRAPH-flagged span that should not be found in the result.
s.setSpan(new SuggestionSpan(getContext(),
new String[] {"" + i}, Spannable.SPAN_PARAGRAPH),
i * 12, i * 12 + 12, Spannable.SPAN_PARAGRAPH);
// Put a normal suggestion span that should be found in the result.
s.setSpan(new SuggestionSpan(getContext(), new String[] {"" + i}, 0), i, i * 2, 0);
// Put a URL span than should not be found in the result.
s.setSpan(new URLSpan("http://a"), i, i * 2, 0);
}
final CharSequence a = s.subSequence(0, 15);
final CharSequence b = s.subSequence(15, s.length());
final Spanned result =
(Spanned)StringUtils.concatWithNonParagraphSuggestionSpansOnly(a, b);
Object[] spans = result.getSpans(0, result.length(), SuggestionSpan.class);
for (int i = 0; i < spans.length; i++) {
final int flags = result.getSpanFlags(spans[i]);
assertEquals("Should not find a span with PARAGRAPH flag",
flags & Spannable.SPAN_PARAGRAPH, 0);
assertTrue("Should be a SuggestionSpan", spans[i] instanceof SuggestionSpan);
}
}
}