1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/widget/gonk/libui/KeyLayoutMap.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,107 @@
1.4 +/*
1.5 + * Copyright (C) 2008 The Android Open Source Project
1.6 + *
1.7 + * Licensed under the Apache License, Version 2.0 (the "License");
1.8 + * you may not use this file except in compliance with the License.
1.9 + * You may obtain a copy of the License at
1.10 + *
1.11 + * http://www.apache.org/licenses/LICENSE-2.0
1.12 + *
1.13 + * Unless required by applicable law or agreed to in writing, software
1.14 + * distributed under the License is distributed on an "AS IS" BASIS,
1.15 + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
1.16 + * See the License for the specific language governing permissions and
1.17 + * limitations under the License.
1.18 + */
1.19 +
1.20 +#ifndef _ANDROIDFW_KEY_LAYOUT_MAP_H
1.21 +#define _ANDROIDFW_KEY_LAYOUT_MAP_H
1.22 +
1.23 +#include <stdint.h>
1.24 +#include <utils/Errors.h>
1.25 +#include <utils/KeyedVector.h>
1.26 +#include "Tokenizer.h"
1.27 +#include <utils/RefBase.h>
1.28 +
1.29 +namespace android {
1.30 +
1.31 +struct AxisInfo {
1.32 + enum Mode {
1.33 + // Axis value is reported directly.
1.34 + MODE_NORMAL = 0,
1.35 + // Axis value should be inverted before reporting.
1.36 + MODE_INVERT = 1,
1.37 + // Axis value should be split into two axes
1.38 + MODE_SPLIT = 2,
1.39 + };
1.40 +
1.41 + // Axis mode.
1.42 + Mode mode;
1.43 +
1.44 + // Axis id.
1.45 + // When split, this is the axis used for values smaller than the split position.
1.46 + int32_t axis;
1.47 +
1.48 + // When split, this is the axis used for values after higher than the split position.
1.49 + int32_t highAxis;
1.50 +
1.51 + // The split value, or 0 if not split.
1.52 + int32_t splitValue;
1.53 +
1.54 + // The flat value, or -1 if none.
1.55 + int32_t flatOverride;
1.56 +
1.57 + AxisInfo() : mode(MODE_NORMAL), axis(-1), highAxis(-1), splitValue(0), flatOverride(-1) {
1.58 + }
1.59 +};
1.60 +
1.61 +/**
1.62 + * Describes a mapping from keyboard scan codes and joystick axes to Android key codes and axes.
1.63 + *
1.64 + * This object is immutable after it has been loaded.
1.65 + */
1.66 +class KeyLayoutMap : public RefBase {
1.67 +public:
1.68 + static status_t load(const String8& filename, sp<KeyLayoutMap>* outMap);
1.69 +
1.70 + status_t mapKey(int32_t scanCode, int32_t usageCode,
1.71 + int32_t* outKeyCode, uint32_t* outFlags) const;
1.72 + status_t findScanCodesForKey(int32_t keyCode, Vector<int32_t>* outScanCodes) const;
1.73 +
1.74 + status_t mapAxis(int32_t scanCode, AxisInfo* outAxisInfo) const;
1.75 +
1.76 +protected:
1.77 + virtual ~KeyLayoutMap();
1.78 +
1.79 +private:
1.80 + struct Key {
1.81 + int32_t keyCode;
1.82 + uint32_t flags;
1.83 + };
1.84 +
1.85 + KeyedVector<int32_t, Key> mKeysByScanCode;
1.86 + KeyedVector<int32_t, Key> mKeysByUsageCode;
1.87 + KeyedVector<int32_t, AxisInfo> mAxes;
1.88 +
1.89 + KeyLayoutMap();
1.90 +
1.91 + const Key* getKey(int32_t scanCode, int32_t usageCode) const;
1.92 +
1.93 + class Parser {
1.94 + KeyLayoutMap* mMap;
1.95 + Tokenizer* mTokenizer;
1.96 +
1.97 + public:
1.98 + Parser(KeyLayoutMap* map, Tokenizer* tokenizer);
1.99 + ~Parser();
1.100 + status_t parse();
1.101 +
1.102 + private:
1.103 + status_t parseKey();
1.104 + status_t parseAxis();
1.105 + };
1.106 +};
1.107 +
1.108 +} // namespace android
1.109 +
1.110 +#endif // _ANDROIDFW_KEY_LAYOUT_MAP_H
