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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.
*/
#ifndef _ANDROIDFW_KEY_LAYOUT_MAP_H
#define _ANDROIDFW_KEY_LAYOUT_MAP_H
#include <stdint.h>
#include <utils/Errors.h>
#include <utils/KeyedVector.h>
#include <utils/Tokenizer.h>
#include <utils/RefBase.h>
namespace android {
struct AxisInfo {
enum Mode {
// Axis value is reported directly.
MODE_NORMAL = 0,
// Axis value should be inverted before reporting.
MODE_INVERT = 1,
// Axis value should be split into two axes
MODE_SPLIT = 2,
};
// Axis mode.
Mode mode;
// Axis id.
// When split, this is the axis used for values smaller than the split position.
int32_t axis;
// When split, this is the axis used for values after higher than the split position.
int32_t highAxis;
// The split value, or 0 if not split.
int32_t splitValue;
// The flat value, or -1 if none.
int32_t flatOverride;
AxisInfo() : mode(MODE_NORMAL), axis(-1), highAxis(-1), splitValue(0), flatOverride(-1) {
}
};
/**
* Describes a mapping from keyboard scan codes and joystick axes to Android key codes and axes.
*
* This object is immutable after it has been loaded.
*/
class KeyLayoutMap : public RefBase {
public:
static status_t load(const String8& filename, sp<KeyLayoutMap>* outMap);
status_t mapKey(int32_t scanCode, int32_t* keyCode, uint32_t* flags) const;
status_t findScanCodesForKey(int32_t keyCode, Vector<int32_t>* outScanCodes) const;
status_t mapAxis(int32_t scanCode, AxisInfo* outAxisInfo) const;
protected:
virtual ~KeyLayoutMap();
private:
struct Key {
int32_t keyCode;
uint32_t flags;
};
KeyedVector<int32_t, Key> mKeys;
KeyedVector<int32_t, AxisInfo> mAxes;
KeyLayoutMap();
class Parser {
KeyLayoutMap* mMap;
Tokenizer* mTokenizer;
public:
Parser(KeyLayoutMap* map, Tokenizer* tokenizer);
~Parser();
status_t parse();
private:
status_t parseKey();
status_t parseAxis();
};
};
} // namespace android
#endif // _ANDROIDFW_KEY_LAYOUT_MAP_H
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