InputDevice.h revision daa3753a04699724d2cfe824ac1f5a266d643a05 
1/*
2 * Copyright (C) 2012 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 _ANDROIDFW_INPUT_DEVICE_H
18#define _ANDROIDFW_INPUT_DEVICE_H
19
20#include <androidfw/Input.h>
21#include <androidfw/KeyCharacterMap.h>
22
23namespace android {
24
25/*
26 * Identifies a device.
27 */
28struct InputDeviceIdentifier {
29    inline InputDeviceIdentifier() :
30            bus(0), vendor(0), product(0), version(0) {
31    }
32
33    // Information provided by the kernel.
34    String8 name;
35    String8 location;
36    String8 uniqueId;
37    uint16_t bus;
38    uint16_t vendor;
39    uint16_t product;
40    uint16_t version;
41
42    // A composite input device descriptor string that uniquely identifies the device
43    // even across reboots or reconnections.  The value of this field is used by
44    // upper layers of the input system to associate settings with individual devices.
45    // It is hashed from whatever kernel provided information is available.
46    // Ideally, the way this value is computed should not change between Android releases
47    // because that would invalidate persistent settings that rely on it.
48    String8 descriptor;
49};
50
51/*
52 * Describes the characteristics and capabilities of an input device.
53 */
54class InputDeviceInfo {
55public:
56    InputDeviceInfo();
57    InputDeviceInfo(const InputDeviceInfo& other);
58    ~InputDeviceInfo();
59
60    struct MotionRange {
61        int32_t axis;
62        uint32_t source;
63        float min;
64        float max;
65        float flat;
66        float fuzz;
67    };
68
69    void initialize(int32_t id, int32_t generation, const InputDeviceIdentifier& identifier,
70            const String8& alias, bool isExternal);
71
72    inline int32_t getId() const { return mId; }
73    inline int32_t getGeneration() const { return mGeneration; }
74    inline const InputDeviceIdentifier& getIdentifier() const { return mIdentifier; }
75    inline const String8& getAlias() const { return mAlias; }
76    inline const String8& getDisplayName() const {
77        return mAlias.isEmpty() ? mIdentifier.name : mAlias;
78    }
79    inline bool isExternal() const { return mIsExternal; }
80    inline uint32_t getSources() const { return mSources; }
81
82    const MotionRange* getMotionRange(int32_t axis, uint32_t source) const;
83
84    void addSource(uint32_t source);
85    void addMotionRange(int32_t axis, uint32_t source,
86            float min, float max, float flat, float fuzz);
87    void addMotionRange(const MotionRange& range);
88
89    inline void setKeyboardType(int32_t keyboardType) { mKeyboardType = keyboardType; }
90    inline int32_t getKeyboardType() const { return mKeyboardType; }
91
92    inline void setKeyCharacterMap(const sp<KeyCharacterMap>& value) {
93        mKeyCharacterMap = value;
94    }
95
96    inline sp<KeyCharacterMap> getKeyCharacterMap() const {
97        return mKeyCharacterMap;
98    }
99
100    inline void setVibrator(bool hasVibrator) { mHasVibrator = hasVibrator; }
101    inline bool hasVibrator() const { return mHasVibrator; }
102
103    inline const Vector<MotionRange>& getMotionRanges() const {
104        return mMotionRanges;
105    }
106
107private:
108    int32_t mId;
109    int32_t mGeneration;
110    InputDeviceIdentifier mIdentifier;
111    String8 mAlias;
112    bool mIsExternal;
113    uint32_t mSources;
114    int32_t mKeyboardType;
115    sp<KeyCharacterMap> mKeyCharacterMap;
116    bool mHasVibrator;
117
118    Vector<MotionRange> mMotionRanges;
119};
120
121/* Types of input device configuration files. */
122enum InputDeviceConfigurationFileType {
123    INPUT_DEVICE_CONFIGURATION_FILE_TYPE_CONFIGURATION = 0,     /* .idc file */
124    INPUT_DEVICE_CONFIGURATION_FILE_TYPE_KEY_LAYOUT = 1,        /* .kl file */
125    INPUT_DEVICE_CONFIGURATION_FILE_TYPE_KEY_CHARACTER_MAP = 2, /* .kcm file */
126};
127
128/*
129 * Gets the path of an input device configuration file, if one is available.
130 * Considers both system provided and user installed configuration files.
131 *
132 * The device identifier is used to construct several default configuration file
133 * names to try based on the device name, vendor, product, and version.
134 *
135 * Returns an empty string if not found.
136 */
137extern String8 getInputDeviceConfigurationFilePathByDeviceIdentifier(
138        const InputDeviceIdentifier& deviceIdentifier,
139        InputDeviceConfigurationFileType type);
140
141/*
142 * Gets the path of an input device configuration file, if one is available.
143 * Considers both system provided and user installed configuration files.
144 *
145 * The name is case-sensitive and is used to construct the filename to resolve.
146 * All characters except 'a'-'z', 'A'-'Z', '0'-'9', '-', and '_' are replaced by underscores.
147 *
148 * Returns an empty string if not found.
149 */
150extern String8 getInputDeviceConfigurationFilePathByName(
151        const String8& name, InputDeviceConfigurationFileType type);
152
153} // namespace android
154
155#endif // _ANDROIDFW_INPUT_DEVICE_H
156