80 lines
3.4 KiB
Java
80 lines
3.4 KiB
Java
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.inputmethod.compat;
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import com.android.inputmethod.latin.EditingUtils.SelectedWord;
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import android.view.inputmethod.InputConnection;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.Method;
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public class InputConnectionCompatUtils {
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private static final Class<?> CLASS_CorrectionInfo = CompatUtils
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.getClass("android.view.inputmethod.CorrectionInfo");
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private static final Class<?>[] INPUT_TYPE_CorrectionInfo = new Class<?>[] { int.class,
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CharSequence.class, CharSequence.class };
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private static final Constructor<?> CONSTRUCTOR_CorrectionInfo = CompatUtils
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.getConstructor(CLASS_CorrectionInfo, INPUT_TYPE_CorrectionInfo);
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private static final Method METHOD_InputConnection_commitCorrection = CompatUtils
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.getMethod(InputConnection.class, "commitCorrection", CLASS_CorrectionInfo);
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private static final Method METHOD_getSelectedText = CompatUtils
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.getMethod(InputConnection.class, "getSelectedText", int.class);
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private static final Method METHOD_setComposingRegion = CompatUtils
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.getMethod(InputConnection.class, "setComposingRegion", int.class, int.class);
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public static final boolean RECORRECTION_SUPPORTED;
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static {
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RECORRECTION_SUPPORTED = METHOD_getSelectedText != null
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&& METHOD_setComposingRegion != null;
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}
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public static void commitCorrection(InputConnection ic, int offset, CharSequence oldText,
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CharSequence newText) {
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if (ic == null || CONSTRUCTOR_CorrectionInfo == null
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|| METHOD_InputConnection_commitCorrection == null) {
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return;
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}
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Object[] args = { offset, oldText, newText };
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Object correctionInfo = CompatUtils.newInstance(CONSTRUCTOR_CorrectionInfo, args);
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if (correctionInfo != null) {
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CompatUtils.invoke(ic, null, METHOD_InputConnection_commitCorrection,
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correctionInfo);
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}
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}
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/**
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* Returns the selected text between the selStart and selEnd positions.
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*/
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public static CharSequence getSelectedText(InputConnection ic, int selStart, int selEnd) {
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// Use reflection, for backward compatibility
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return (CharSequence) CompatUtils.invoke(
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ic, null, METHOD_getSelectedText, 0);
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}
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/**
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* Tries to set the text into composition mode if there is support for it in the framework.
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*/
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public static void underlineWord(InputConnection ic, SelectedWord word) {
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// Use reflection, for backward compatibility
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// If method not found, there's nothing we can do. It still works but just wont underline
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// the word.
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CompatUtils.invoke(
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ic, null, METHOD_setComposingRegion, word.mStart, word.mEnd);
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}
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}
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