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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <input/Input.h>
#include <android/keycodes.h>
#include <unordered_map>
namespace android {
template<typename T, size_t N>
size_t size(T (&)[N]) { return N; }
struct InputEventLabel {
const char *literal;
int value;
};
struct EvdevEventLabel {
std::string type;
std::string code;
std::string value;
};
// NOTE: If you want a new key code, axis code, led code or flag code in keylayout file,
// then you must add it to InputEventLabels.cpp.
class InputEventLookup {
/**
* This class is not purely static, but uses a singleton pattern in order to delay the
* initialization of the maps that it contains. If it were purely static, the maps could be
* created early, and would cause sanitizers to report memory leaks.
*/
public:
InputEventLookup(InputEventLookup& other) = delete;
void operator=(const InputEventLookup&) = delete;
static std::optional<int> lookupValueByLabel(const std::unordered_map<std::string, int>& map,
const char* literal);
static const char* lookupLabelByValue(const std::vector<InputEventLabel>& vec, int value);
static std::optional<int> getKeyCodeByLabel(const char* label);
static const char* getLabelByKeyCode(int32_t keyCode);
static std::optional<int> getKeyFlagByLabel(const char* label);
static std::optional<int> getAxisByLabel(const char* label);
static const char* getAxisLabel(int32_t axisId);
static std::optional<int> getLedByLabel(const char* label);
static EvdevEventLabel getLinuxEvdevLabel(int32_t type, int32_t code, int32_t value);
static std::optional<int> getLinuxEvdevEventTypeByLabel(const char* label);
static std::optional<int> getLinuxEvdevEventCodeByLabel(int32_t type, const char* label);
static std::optional<int> getLinuxEvdevInputPropByLabel(const char* label);
private:
InputEventLookup();
static const InputEventLookup& get() {
static InputEventLookup sLookup;
return sLookup;
}
const std::unordered_map<std::string, int> KEYCODES;
const std::vector<InputEventLabel> KEY_NAMES;
const std::unordered_map<std::string, int> AXES;
const std::vector<InputEventLabel> AXES_NAMES;
const std::unordered_map<std::string, int> LEDS;
const std::unordered_map<std::string, int> FLAGS;
};
} // namespace android
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