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/*
* 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);
}
}
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