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105 lines
3.0 KiB
105 lines
3.0 KiB
6 years ago
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/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _LIBINPUT_KEYBOARD_H
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#define _LIBINPUT_KEYBOARD_H
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#include <input/Input.h>
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#include <input/InputDevice.h>
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#include <input/InputEventLabels.h>
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#include <utils/Errors.h>
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#include <utils/String8.h>
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#include <utils/PropertyMap.h>
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namespace android {
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enum {
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/* Device id of the built in keyboard. */
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DEVICE_ID_BUILT_IN_KEYBOARD = 0,
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/* Device id of a generic virtual keyboard with a full layout that can be used
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* to synthesize key events. */
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DEVICE_ID_VIRTUAL_KEYBOARD = -1,
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};
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class KeyLayoutMap;
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class KeyCharacterMap;
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/**
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* Loads the key layout map and key character map for a keyboard device.
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*/
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class KeyMap {
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public:
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String8 keyLayoutFile;
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sp<KeyLayoutMap> keyLayoutMap;
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String8 keyCharacterMapFile;
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sp<KeyCharacterMap> keyCharacterMap;
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KeyMap();
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~KeyMap();
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status_t load(const InputDeviceIdentifier& deviceIdenfier,
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const PropertyMap* deviceConfiguration);
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inline bool haveKeyLayout() const {
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return !keyLayoutFile.isEmpty();
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}
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inline bool haveKeyCharacterMap() const {
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return !keyCharacterMapFile.isEmpty();
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}
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inline bool isComplete() const {
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return haveKeyLayout() && haveKeyCharacterMap();
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}
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private:
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bool probeKeyMap(const InputDeviceIdentifier& deviceIdentifier, const String8& name);
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status_t loadKeyLayout(const InputDeviceIdentifier& deviceIdentifier, const String8& name);
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status_t loadKeyCharacterMap(const InputDeviceIdentifier& deviceIdentifier,
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const String8& name);
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String8 getPath(const InputDeviceIdentifier& deviceIdentifier,
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const String8& name, InputDeviceConfigurationFileType type);
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};
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/**
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* Returns true if the keyboard is eligible for use as a built-in keyboard.
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*/
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extern bool isEligibleBuiltInKeyboard(const InputDeviceIdentifier& deviceIdentifier,
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const PropertyMap* deviceConfiguration, const KeyMap* keyMap);
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/**
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* Updates a meta state field when a key is pressed or released.
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*/
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extern int32_t updateMetaState(int32_t keyCode, bool down, int32_t oldMetaState);
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/**
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* Normalizes the meta state such that if either the left or right modifier
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* meta state bits are set then the result will also include the universal
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* bit for that modifier.
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*/
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extern int32_t normalizeMetaState(int32_t oldMetaState);
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/**
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* Returns true if a key is a meta key like ALT or CAPS_LOCK.
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*/
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extern bool isMetaKey(int32_t keyCode);
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} // namespace android
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#endif // _LIBINPUT_KEYBOARD_H
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