1/*
2 * Copyright (C) 2010 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#ifndef _LIBINPUT_VIRTUAL_KEY_MAP_H
18#define _LIBINPUT_VIRTUAL_KEY_MAP_H
19
20#include <stdint.h>
21
22#include <input/Input.h>
23#include <utils/Errors.h>
24#include <utils/KeyedVector.h>
25#include <utils/Tokenizer.h>
26#include <utils/String8.h>
27#include <utils/Unicode.h>
28
29namespace android {
30
31/* Describes a virtual key. */
32struct VirtualKeyDefinition {
33    int32_t scanCode;
34
35    // configured position data, specified in display coords
36    int32_t centerX;
37    int32_t centerY;
38    int32_t width;
39    int32_t height;
40};
41
42
43/**
44 * Describes a collection of virtual keys on a touch screen in terms of
45 * virtual scan codes and hit rectangles.
46 *
47 * This object is immutable after it has been loaded.
48 */
49class VirtualKeyMap {
50public:
51    ~VirtualKeyMap();
52
53    static status_t load(const String8& filename, VirtualKeyMap** outMap);
54
55    inline const Vector<VirtualKeyDefinition>& getVirtualKeys() const {
56        return mVirtualKeys;
57    }
58
59private:
60    class Parser {
61        VirtualKeyMap* mMap;
62        Tokenizer* mTokenizer;
63
64    public:
65        Parser(VirtualKeyMap* map, Tokenizer* tokenizer);
66        ~Parser();
67        status_t parse();
68
69    private:
70        bool consumeFieldDelimiterAndSkipWhitespace();
71        bool parseNextIntField(int32_t* outValue);
72    };
73
74    Vector<VirtualKeyDefinition> mVirtualKeys;
75
76    VirtualKeyMap();
77};
78
79} // namespace android
80
81#endif // _LIBINPUT_KEY_CHARACTER_MAP_H
82