Put SuggestionSpan at commitText

Bug: 4346045
Change-Id: Iaabdb8a148b2601bb9cbc2b08509adac164105a4

1 files changed, 64 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/compat/SuggestionSpanUtils.java b/java/src/com/android/inputmethod/compat/SuggestionSpanUtils.java
new file mode 100644
index 000000000..e8be88759
--- /dev/null
+++ b/java/src/com/android/inputmethod/compat/SuggestionSpanUtils.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.inputmethod.compat;
+
+import com.android.inputmethod.latin.SuggestedWords;
+
+import android.content.Context;
+import android.text.Spannable;
+import android.text.SpannableString;
+import android.text.Spanned;
+
+import java.lang.reflect.Constructor;
+
+public class SuggestionSpanUtils {
+    private static final Class<?> CLASS_SuggestionSpan =
+            CompatUtils.getClass("android.text.style.SuggestionSpan");
+    private static final Class<?>[] INPUT_TYPE_SuggestionSpan = new Class<?>[] {
+        Context.class, String[].class, int.class
+    };
+    private static final Constructor<?> CONSTRUCTOR_SuggestionSpan =
+            CompatUtils.getConstructor(CLASS_SuggestionSpan, INPUT_TYPE_SuggestionSpan);
+
+    public static CharSequence getTextWithSuggestionSpan(
+            Context context, CharSequence suggestion, SuggestedWords suggestedWords) {
+        if (CONSTRUCTOR_SuggestionSpan == null || suggestedWords == null
+                || suggestedWords.size() == 0) {
+            return suggestion;
+        }
+
+        final Spannable spannable;
+        if (suggestion instanceof Spannable) {
+            spannable = (Spannable) suggestion;
+        } else {
+            spannable = new SpannableString(suggestion);
+        }
+        // TODO: Use SUGGESTIONS_MAX_SIZE instead of 5.
+        final int N = Math.min(5, suggestedWords.size());
+        final String[] suggestionsArray = new String[N];
+        for (int i = 0; i < N; ++i) {
+            suggestionsArray[i] = suggestedWords.getWord(i).toString();
+        }
+        final Object[] args = {context, suggestionsArray, 0};
+        final Object ss = CompatUtils.newInstance(CONSTRUCTOR_SuggestionSpan, args);
+        if (ss == null) {
+            return suggestion;
+        }
+        spannable.setSpan(ss, 0, suggestion.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+        return spannable;
+    }
+}