ModifierKeyState.java revision 46831d5a4b135e5c21f2212d1d8aef09806800ed 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
5 * use this file except in compliance with the License. You may obtain a copy of
6 * 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, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations under
14 * the License.
15 */
16
17package com.android.inputmethod.keyboard.internal;
18
19import android.util.Log;
20
21import com.android.inputmethod.keyboard.KeyboardSwitcher;
22
23/* package */ class ModifierKeyState {
24    protected static final String TAG = "ModifierKeyState";
25    protected static final boolean DEBUG = KeyboardSwitcher.DEBUG_STATE;
26
27    protected static final int RELEASING = 0;
28    protected static final int PRESSING = 1;
29    protected static final int MOMENTARY = 2;
30
31    protected final String mName;
32    protected int mState = RELEASING;
33
34    public ModifierKeyState(String name) {
35        mName = name;
36    }
37
38    public void onPress() {
39        final int oldState = mState;
40        mState = PRESSING;
41        if (DEBUG)
42            Log.d(TAG, mName + ".onPress: " + toString(oldState) + " > " + this);
43    }
44
45    public void onRelease() {
46        final int oldState = mState;
47        mState = RELEASING;
48        if (DEBUG)
49            Log.d(TAG, mName + ".onRelease: " + toString(oldState) + " > " + this);
50    }
51
52    public void onOtherKeyPressed() {
53        final int oldState = mState;
54        if (oldState == PRESSING)
55            mState = MOMENTARY;
56        if (DEBUG)
57            Log.d(TAG, mName + ".onOtherKeyPressed: " + toString(oldState) + " > " + this);
58    }
59
60    public boolean isPressing() {
61        return mState == PRESSING;
62    }
63
64    public boolean isReleasing() {
65        return mState == RELEASING;
66    }
67
68    public boolean isMomentary() {
69        return mState == MOMENTARY;
70    }
71
72    @Override
73    public String toString() {
74        return toString(mState);
75    }
76
77    protected String toString(int state) {
78        switch (state) {
79        case RELEASING: return "RELEASING";
80        case PRESSING: return "PRESSING";
81        case MOMENTARY: return "MOMENTARY";
82        default: return "UNKNOWN";
83        }
84    }
85}
86