1 files changed, 91 insertions, 0 deletions
diff --git a/java/src/com/android/inputmethod/compat/InputConnectionCompatUtils.java b/java/src/com/android/inputmethod/compat/InputConnectionCompatUtils.java
new file mode 100644
index 000000000..c926be06f
--- /dev/null
+++ b/java/src/com/android/inputmethod/compat/InputConnectionCompatUtils.java
@@ -0,0 +1,91 @@
+/*
+ * 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.EditingUtils.SelectedWord;
+
+import android.util.Log;
+import android.view.inputmethod.InputConnection;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+public class InputConnectionCompatUtils {
+    private static final String TAG = InputConnectionCompatUtils.class.getSimpleName();
+    private static final Class<?> CLASS_CorrectionInfo = CompatUtils
+            .getClass("android.view.inputmethod.CorrectionInfo");
+    private static final Class<?>[] INPUT_TYPE_CorrectionInfo = new Class<?>[] { int.class,
+            CharSequence.class, CharSequence.class };
+    private static final Constructor<?> CONSTRUCTOR_CorrectionInfo = CompatUtils
+            .getConstructor(CLASS_CorrectionInfo, INPUT_TYPE_CorrectionInfo);
+    private static final Method METHOD_InputConnection_commitCorrection = CompatUtils
+            .getMethod(InputConnection.class, "commitCorrection", CLASS_CorrectionInfo);
+    private static final Method METHOD_getSelectedText = CompatUtils
+            .getMethod(InputConnection.class, "getSelectedText", int.class);
+    private static final Method METHOD_setComposingRegion = CompatUtils
+            .getMethod(InputConnection.class, "setComposingRegion", int.class, int.class);
+    public static final boolean RECORRECTION_SUPPORTED;
+
+    static {
+        RECORRECTION_SUPPORTED = METHOD_getSelectedText != null
+                && METHOD_setComposingRegion != null;
+    }
+
+    public static void commitCorrection(InputConnection ic, int offset, CharSequence oldText,
+            CharSequence newText) {
+        if (ic == null || CONSTRUCTOR_CorrectionInfo == null
+                || METHOD_InputConnection_commitCorrection == null) {
+            return;
+        }
+        Object[] args = { offset, oldText, newText };
+        try {
+            Object correctionInfo = CONSTRUCTOR_CorrectionInfo.newInstance(args);
+            CompatUtils.invoke(ic, null, METHOD_InputConnection_commitCorrection,
+                    correctionInfo);
+        } catch (IllegalArgumentException e) {
+            Log.e(TAG, "Error in commitCorrection: IllegalArgumentException");
+        } catch (InstantiationException e) {
+            Log.e(TAG, "Error in commitCorrection: InstantiationException");
+        } catch (IllegalAccessException e) {
+            Log.e(TAG, "Error in commitCorrection: IllegalAccessException");
+        } catch (InvocationTargetException e) {
+            Log.e(TAG, "Error in commitCorrection: InvocationTargetException");
+        }
+    }
+
+
+    /**
+     * Returns the selected text between the selStart and selEnd positions.
+     */
+    public static CharSequence getSelectedText(InputConnection ic, int selStart, int selEnd) {
+        // Use reflection, for backward compatibility
+        return (CharSequence) CompatUtils.invoke(
+                ic, null, METHOD_getSelectedText, 0);
+    }
+
+    /**
+     * Tries to set the text into composition mode if there is support for it in the framework.
+     */
+    public static void underlineWord(InputConnection ic, SelectedWord word) {
+        // Use reflection, for backward compatibility
+        // If method not found, there's nothing we can do. It still works but just wont underline
+        // the word.
+        CompatUtils.invoke(
+                ic, null, METHOD_setComposingRegion, word.mStart, word.mEnd);
+    }
+}