InputDevice.cpp revision 8bca94ad83f82682bc15df29dc25377fe43da17f
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#define LOG_TAG "InputDevice"
18
19#include <stdlib.h>
20#include <unistd.h>
21#include <ctype.h>
22
23#include <androidfw/InputDevice.h>
24
25namespace android {
26
27static const char* CONFIGURATION_FILE_DIR[] = {
28        "idc/",
29        "keylayout/",
30        "keychars/",
31};
32
33static const char* CONFIGURATION_FILE_EXTENSION[] = {
34        ".idc",
35        ".kl",
36        ".kcm",
37};
38
39static bool isValidNameChar(char ch) {
40    return isascii(ch) && (isdigit(ch) || isalpha(ch) || ch == '-' || ch == '_');
41}
42
43static void appendInputDeviceConfigurationFileRelativePath(String8& path,
44        const String8& name, InputDeviceConfigurationFileType type) {
45    path.append(CONFIGURATION_FILE_DIR[type]);
46    for (size_t i = 0; i < name.length(); i++) {
47        char ch = name[i];
48        if (!isValidNameChar(ch)) {
49            ch = '_';
50        }
51        path.append(&ch, 1);
52    }
53    path.append(CONFIGURATION_FILE_EXTENSION[type]);
54}
55
56String8 getInputDeviceConfigurationFilePathByDeviceIdentifier(
57        const InputDeviceIdentifier& deviceIdentifier,
58        InputDeviceConfigurationFileType type) {
59    if (deviceIdentifier.vendor !=0 && deviceIdentifier.product != 0) {
60        if (deviceIdentifier.version != 0) {
61            // Try vendor product version.
62            String8 versionPath(getInputDeviceConfigurationFilePathByName(
63                    String8::format("Vendor_%04x_Product_%04x_Version_%04x",
64                            deviceIdentifier.vendor, deviceIdentifier.product,
65                            deviceIdentifier.version),
66                    type));
67            if (!versionPath.isEmpty()) {
68                return versionPath;
69            }
70        }
71
72        // Try vendor product.
73        String8 productPath(getInputDeviceConfigurationFilePathByName(
74                String8::format("Vendor_%04x_Product_%04x",
75                        deviceIdentifier.vendor, deviceIdentifier.product),
76                type));
77        if (!productPath.isEmpty()) {
78            return productPath;
79        }
80    }
81
82    // Try device name.
83    return getInputDeviceConfigurationFilePathByName(deviceIdentifier.name, type);
84}
85
86String8 getInputDeviceConfigurationFilePathByName(
87        const String8& name, InputDeviceConfigurationFileType type) {
88    // Search system repository.
89    String8 path;
90    path.setTo(getenv("ANDROID_ROOT"));
91    path.append("/usr/");
92    appendInputDeviceConfigurationFileRelativePath(path, name, type);
93#if DEBUG_PROBE
94    ALOGD("Probing for system provided input device configuration file: path='%s'", path.string());
95#endif
96    if (!access(path.string(), R_OK)) {
97#if DEBUG_PROBE
98        ALOGD("Found");
99#endif
100        return path;
101    }
102
103    // Search user repository.
104    // TODO Should only look here if not in safe mode.
105    path.setTo(getenv("ANDROID_DATA"));
106    path.append("/system/devices/");
107    appendInputDeviceConfigurationFileRelativePath(path, name, type);
108#if DEBUG_PROBE
109    ALOGD("Probing for system user input device configuration file: path='%s'", path.string());
110#endif
111    if (!access(path.string(), R_OK)) {
112#if DEBUG_PROBE
113        ALOGD("Found");
114#endif
115        return path;
116    }
117
118    // Not found.
119#if DEBUG_PROBE
120    ALOGD("Probe failed to find input device configuration file: name='%s', type=%d",
121            name.string(), type);
122#endif
123    return String8();
124}
125
126
127// --- InputDeviceInfo ---
128
129InputDeviceInfo::InputDeviceInfo() {
130    initialize(-1, -1, InputDeviceIdentifier(), String8());
131}
132
133InputDeviceInfo::InputDeviceInfo(const InputDeviceInfo& other) :
134        mId(other.mId), mGeneration(other.mGeneration), mIdentifier(other.mIdentifier),
135        mAlias(other.mAlias), mSources(other.mSources),
136        mKeyboardType(other.mKeyboardType),
137        mKeyCharacterMap(other.mKeyCharacterMap),
138        mHasVibrator(other.mHasVibrator),
139        mMotionRanges(other.mMotionRanges) {
140}
141
142InputDeviceInfo::~InputDeviceInfo() {
143}
144
145void InputDeviceInfo::initialize(int32_t id, int32_t generation,
146        const InputDeviceIdentifier& identifier, const String8& alias) {
147    mId = id;
148    mGeneration = generation;
149    mIdentifier = identifier;
150    mAlias = alias;
151    mSources = 0;
152    mKeyboardType = AINPUT_KEYBOARD_TYPE_NONE;
153    mHasVibrator = false;
154    mMotionRanges.clear();
155}
156
157const InputDeviceInfo::MotionRange* InputDeviceInfo::getMotionRange(
158        int32_t axis, uint32_t source) const {
159    size_t numRanges = mMotionRanges.size();
160    for (size_t i = 0; i < numRanges; i++) {
161        const MotionRange& range = mMotionRanges.itemAt(i);
162        if (range.axis == axis && range.source == source) {
163            return &range;
164        }
165    }
166    return NULL;
167}
168
169void InputDeviceInfo::addSource(uint32_t source) {
170    mSources |= source;
171}
172
173void InputDeviceInfo::addMotionRange(int32_t axis, uint32_t source, float min, float max,
174        float flat, float fuzz) {
175    MotionRange range = { axis, source, min, max, flat, fuzz };
176    mMotionRanges.add(range);
177}
178
179void InputDeviceInfo::addMotionRange(const MotionRange& range) {
180    mMotionRanges.add(range);
181}
182
183} // namespace android
184