1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.inputmethod.compat; 18 19 import android.view.inputmethod.InputConnection; 20 import android.view.inputmethod.InputMethodManager; 21 22 public final class InputConnectionCompatUtils { 23 private static final CompatUtils.ClassWrapper sInputConnectionType; 24 private static final CompatUtils.ToBooleanMethodWrapper sRequestCursorUpdatesMethod; 25 static { 26 sInputConnectionType = new CompatUtils.ClassWrapper(InputConnection.class); 27 sRequestCursorUpdatesMethod = sInputConnectionType.getPrimitiveMethod( 28 "requestCursorUpdates", false, int.class); 29 } 30 31 public static boolean isRequestCursorUpdatesAvailable() { 32 return sRequestCursorUpdatesMethod != null; 33 } 34 35 /** 36 * Local copies of some constants in InputConnection until the SDK becomes publicly available. 37 */ 38 private static int CURSOR_UPDATE_IMMEDIATE = 1 << 0; 39 private static int CURSOR_UPDATE_MONITOR = 1 << 1; 40 41 private static boolean requestCursorUpdatesImpl(final InputConnection inputConnection, 42 final int cursorUpdateMode) { 43 if (!isRequestCursorUpdatesAvailable()) { 44 return false; 45 } 46 return sRequestCursorUpdatesMethod.invoke(inputConnection, cursorUpdateMode); 47 } 48 49 /** 50 * Requests the editor to call back {@link InputMethodManager#updateCursorAnchorInfo}. 51 * @param inputConnection the input connection to which the request is to be sent. 52 * @param enableMonitor {@code true} to request the editor to call back the method whenever the 53 * cursor/anchor position is changed. 54 * @param requestImmediateCallback {@code true} to request the editor to call back the method 55 * as soon as possible to notify the current cursor/anchor position to the input method. 56 * @return {@code false} if the request is not handled. Otherwise returns {@code true}. 57 */ 58 public static boolean requestCursorUpdates(final InputConnection inputConnection, 59 final boolean enableMonitor, final boolean requestImmediateCallback) { 60 final int cursorUpdateMode = (enableMonitor ? CURSOR_UPDATE_MONITOR : 0) 61 | (requestImmediateCallback ? CURSOR_UPDATE_IMMEDIATE : 0); 62 return requestCursorUpdatesImpl(inputConnection, cursorUpdateMode); 63 } 64 } 65
