diff --git a/java/src/com/android/inputmethod/latin/RichInputConnection.java b/java/src/com/android/inputmethod/latin/RichInputConnection.java
index fa7f23efb7d9a4790ebd9a9d40ca122f9d7923f0..925381b502128810c12c5a279e4e11d272c1871d 100644
--- a/java/src/com/android/inputmethod/latin/RichInputConnection.java
+++ b/java/src/com/android/inputmethod/latin/RichInputConnection.java
@@ -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) {
diff --git a/java/src/com/android/inputmethod/latin/utils/StringUtils.java b/java/src/com/android/inputmethod/latin/utils/StringUtils.java
index 121aecf0f98c556651e197732861bb0dc68ddb85..327780ad0aa8c9d68453d173f1369fffbcee8fdb 100644
--- a/java/src/com/android/inputmethod/latin/utils/StringUtils.java
+++ b/java/src/com/android/inputmethod/latin/utils/StringUtils.java
@@ -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);
+ }
}
diff --git a/tests/src/com/android/inputmethod/latin/utils/StringUtilsTests.java b/tests/src/com/android/inputmethod/latin/utils/StringUtilsTests.java
index 4e396a1cf68ded88ec9a7f1bef3047bfb894f0e2..eb9fb984e1cac91834f86b7cc85f1136dec8f061 100644
--- a/tests/src/com/android/inputmethod/latin/utils/StringUtilsTests.java
+++ b/tests/src/com/android/inputmethod/latin/utils/StringUtilsTests.java
@@ -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);
+ }
+ }
}