1 files changed, 87 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..4929dd948
--- /dev/null
+++ b/java/src/com/android/inputmethod/compat/SuggestionSpanUtils.java
@@ -0,0 +1,87 @@
+/*
+ * 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 com.android.inputmethod.latin.SuggestionSpanPickedNotificationReceiver;
+
+import android.content.Context;
+import android.text.Spannable;
+import android.text.SpannableString;
+import android.text.Spanned;
+import android.text.TextUtils;
+
+import java.lang.reflect.Constructor;
+import java.util.ArrayList;
+import java.util.Locale;
+
+public class SuggestionSpanUtils {
+    // TODO: Use reflection to get field values
+    public static final String ACTION_SUGGESTION_PICKED =
+            "android.text.style.SUGGESTION_PICKED";
+    public static final String SUGGESTION_SPAN_PICKED_AFTER = "after";
+    public static final String SUGGESTION_SPAN_PICKED_BEFORE = "before";
+    public static final String SUGGESTION_SPAN_PICKED_HASHCODE = "hashcode";
+    public static final int SUGGESTION_MAX_SIZE = 5;
+    public static final boolean SUGGESTION_SPAN_IS_SUPPORTED;
+
+    private static final Class<?> CLASS_SuggestionSpan = CompatUtils
+            .getClass("android.text.style.SuggestionSpan");
+    private static final Class<?>[] INPUT_TYPE_SuggestionSpan = new Class<?>[] {
+            Context.class, Locale.class, String[].class, int.class, Class.class };
+    private static final Constructor<?> CONSTRUCTOR_SuggestionSpan = CompatUtils
+            .getConstructor(CLASS_SuggestionSpan, INPUT_TYPE_SuggestionSpan);
+    static {
+        SUGGESTION_SPAN_IS_SUPPORTED =
+                CLASS_SuggestionSpan != null && CONSTRUCTOR_SuggestionSpan != null;
+    }
+
+    public static CharSequence getTextWithSuggestionSpan(Context context,
+            CharSequence pickedWord, SuggestedWords suggestedWords) {
+        if (TextUtils.isEmpty(pickedWord) || CONSTRUCTOR_SuggestionSpan == null
+                || suggestedWords == null || suggestedWords.size() == 0) {
+            return pickedWord;
+        }
+
+        final Spannable spannable;
+        if (pickedWord instanceof Spannable) {
+            spannable = (Spannable) pickedWord;
+        } else {
+            spannable = new SpannableString(pickedWord);
+        }
+        final ArrayList<String> suggestionsList = new ArrayList<String>();
+        for (int i = 0; i < suggestedWords.size(); ++i) {
+            if (suggestionsList.size() >= SUGGESTION_MAX_SIZE) {
+                break;
+            }
+            final CharSequence word = suggestedWords.getWord(i);
+            if (!TextUtils.equals(pickedWord, word)) {
+                suggestionsList.add(word.toString());
+            }
+        }
+
+        final Object[] args =
+                { context, null, suggestionsList.toArray(new String[suggestionsList.size()]), 0,
+                        (Class<?>) SuggestionSpanPickedNotificationReceiver.class };
+        final Object ss = CompatUtils.newInstance(CONSTRUCTOR_SuggestionSpan, args);
+        if (ss == null) {
+            return pickedWord;
+        }
+        spannable.setSpan(ss, 0, pickedWord.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+        return spannable;
+    }
+}