258 lines
8.5 KiB
C
258 lines
8.5 KiB
C
|
/*
|
||
|
|
* 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 _LIBINPUT_KEY_CHARACTER_MAP_H
|
||
|
|
#define _LIBINPUT_KEY_CHARACTER_MAP_H
|
||
|
|
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
#if HAVE_ANDROID_OS
|
||
|
|
#include <binder/IBinder.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include <input/Input.h>
|
||
|
|
#include <utils/Errors.h>
|
||
|
|
#include <utils/KeyedVector.h>
|
||
|
|
#include <utils/Tokenizer.h>
|
||
|
|
#include <utils/String8.h>
|
||
|
|
#include <utils/Unicode.h>
|
||
|
|
#include <utils/RefBase.h>
|
||
|
|
|
||
|
|
namespace android {
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Describes a mapping from Android key codes to characters.
|
||
|
|
* Also specifies other functions of the keyboard such as the keyboard type
|
||
|
|
* and key modifier semantics.
|
||
|
|
*
|
||
|
|
* This object is immutable after it has been loaded.
|
||
|
|
*/
|
||
|
|
class KeyCharacterMap : public RefBase {
|
||
|
|
public:
|
||
|
|
enum KeyboardType {
|
||
|
|
KEYBOARD_TYPE_UNKNOWN = 0,
|
||
|
|
KEYBOARD_TYPE_NUMERIC = 1,
|
||
|
|
KEYBOARD_TYPE_PREDICTIVE = 2,
|
||
|
|
KEYBOARD_TYPE_ALPHA = 3,
|
||
|
|
KEYBOARD_TYPE_FULL = 4,
|
||
|
|
KEYBOARD_TYPE_SPECIAL_FUNCTION = 5,
|
||
|
|
KEYBOARD_TYPE_OVERLAY = 6,
|
||
|
|
};
|
||
|
|
|
||
|
|
enum Format {
|
||
|
|
// Base keyboard layout, may contain device-specific options, such as "type" declaration.
|
||
|
|
FORMAT_BASE = 0,
|
||
|
|
// Overlay keyboard layout, more restrictive, may be published by applications,
|
||
|
|
// cannot override device-specific options.
|
||
|
|
FORMAT_OVERLAY = 1,
|
||
|
|
// Either base or overlay layout ok.
|
||
|
|
FORMAT_ANY = 2,
|
||
|
|
};
|
||
|
|
|
||
|
|
// Substitute key code and meta state for fallback action.
|
||
|
|
struct FallbackAction {
|
||
|
|
int32_t keyCode;
|
||
|
|
int32_t metaState;
|
||
|
|
};
|
||
|
|
|
||
|
|
/* Loads a key character map from a file. */
|
||
|
|
static status_t load(const String8& filename, Format format, sp<KeyCharacterMap>* outMap);
|
||
|
|
|
||
|
|
/* Loads a key character map from its string contents. */
|
||
|
|
static status_t loadContents(const String8& filename,
|
||
|
|
const char* contents, Format format, sp<KeyCharacterMap>* outMap);
|
||
|
|
|
||
|
|
/* Combines a base key character map and an overlay. */
|
||
|
|
static sp<KeyCharacterMap> combine(const sp<KeyCharacterMap>& base,
|
||
|
|
const sp<KeyCharacterMap>& overlay);
|
||
|
|
|
||
|
|
/* Returns an empty key character map. */
|
||
|
|
static sp<KeyCharacterMap> empty();
|
||
|
|
|
||
|
|
/* Gets the keyboard type. */
|
||
|
|
int32_t getKeyboardType() const;
|
||
|
|
|
||
|
|
/* Gets the primary character for this key as in the label physically printed on it.
|
||
|
|
* Returns 0 if none (eg. for non-printing keys). */
|
||
|
|
char16_t getDisplayLabel(int32_t keyCode) const;
|
||
|
|
|
||
|
|
/* Gets the Unicode character for the number or symbol generated by the key
|
||
|
|
* when the keyboard is used as a dialing pad.
|
||
|
|
* Returns 0 if no number or symbol is generated.
|
||
|
|
*/
|
||
|
|
char16_t getNumber(int32_t keyCode) const;
|
||
|
|
|
||
|
|
/* Gets the Unicode character generated by the key and meta key modifiers.
|
||
|
|
* Returns 0 if no character is generated.
|
||
|
|
*/
|
||
|
|
char16_t getCharacter(int32_t keyCode, int32_t metaState) const;
|
||
|
|
|
||
|
|
/* Gets the fallback action to use by default if the application does not
|
||
|
|
* handle the specified key.
|
||
|
|
* Returns true if an action was available, false if none.
|
||
|
|
*/
|
||
|
|
bool getFallbackAction(int32_t keyCode, int32_t metaState,
|
||
|
|
FallbackAction* outFallbackAction) const;
|
||
|
|
|
||
|
|
/* Gets the first matching Unicode character that can be generated by the key,
|
||
|
|
* preferring the one with the specified meta key modifiers.
|
||
|
|
* Returns 0 if no matching character is generated.
|
||
|
|
*/
|
||
|
|
char16_t getMatch(int32_t keyCode, const char16_t* chars,
|
||
|
|
size_t numChars, int32_t metaState) const;
|
||
|
|
|
||
|
|
/* Gets a sequence of key events that could plausibly generate the specified
|
||
|
|
* character sequence. Returns false if some of the characters cannot be generated.
|
||
|
|
*/
|
||
|
|
bool getEvents(int32_t deviceId, const char16_t* chars, size_t numChars,
|
||
|
|
Vector<KeyEvent>& outEvents) const;
|
||
|
|
|
||
|
|
/* Maps a scan code and usage code to a key code, in case this key map overrides
|
||
|
|
* the mapping in some way. */
|
||
|
|
status_t mapKey(int32_t scanCode, int32_t usageCode, int32_t* outKeyCode) const;
|
||
|
|
|
||
|
|
#if HAVE_ANDROID_OS
|
||
|
|
/* Reads a key map from a parcel. */
|
||
|
|
static sp<KeyCharacterMap> readFromParcel(Parcel* parcel);
|
||
|
|
|
||
|
|
/* Writes a key map to a parcel. */
|
||
|
|
void writeToParcel(Parcel* parcel) const;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
protected:
|
||
|
|
virtual ~KeyCharacterMap();
|
||
|
|
|
||
|
|
private:
|
||
|
|
struct Behavior {
|
||
|
|
Behavior();
|
||
|
|
Behavior(const Behavior& other);
|
||
|
|
|
||
|
|
/* The next behavior in the list, or NULL if none. */
|
||
|
|
Behavior* next;
|
||
|
|
|
||
|
|
/* The meta key modifiers for this behavior. */
|
||
|
|
int32_t metaState;
|
||
|
|
|
||
|
|
/* The character to insert. */
|
||
|
|
char16_t character;
|
||
|
|
|
||
|
|
/* The fallback keycode if the key is not handled. */
|
||
|
|
int32_t fallbackKeyCode;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Key {
|
||
|
|
Key();
|
||
|
|
Key(const Key& other);
|
||
|
|
~Key();
|
||
|
|
|
||
|
|
/* The single character label printed on the key, or 0 if none. */
|
||
|
|
char16_t label;
|
||
|
|
|
||
|
|
/* The number or symbol character generated by the key, or 0 if none. */
|
||
|
|
char16_t number;
|
||
|
|
|
||
|
|
/* The list of key behaviors sorted from most specific to least specific
|
||
|
|
* meta key binding. */
|
||
|
|
Behavior* firstBehavior;
|
||
|
|
};
|
||
|
|
|
||
|
|
class Parser {
|
||
|
|
enum State {
|
||
|
|
STATE_TOP = 0,
|
||
|
|
STATE_KEY = 1,
|
||
|
|
};
|
||
|
|
|
||
|
|
enum {
|
||
|
|
PROPERTY_LABEL = 1,
|
||
|
|
PROPERTY_NUMBER = 2,
|
||
|
|
PROPERTY_META = 3,
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Property {
|
||
|
|
inline Property(int32_t property = 0, int32_t metaState = 0) :
|
||
|
|
property(property), metaState(metaState) { }
|
||
|
|
|
||
|
|
int32_t property;
|
||
|
|
int32_t metaState;
|
||
|
|
};
|
||
|
|
|
||
|
|
KeyCharacterMap* mMap;
|
||
|
|
Tokenizer* mTokenizer;
|
||
|
|
Format mFormat;
|
||
|
|
State mState;
|
||
|
|
int32_t mKeyCode;
|
||
|
|
|
||
|
|
public:
|
||
|
|
Parser(KeyCharacterMap* map, Tokenizer* tokenizer, Format format);
|
||
|
|
~Parser();
|
||
|
|
status_t parse();
|
||
|
|
|
||
|
|
private:
|
||
|
|
status_t parseType();
|
||
|
|
status_t parseMap();
|
||
|
|
status_t parseMapKey();
|
||
|
|
status_t parseKey();
|
||
|
|
status_t parseKeyProperty();
|
||
|
|
status_t finishKey(Key* key);
|
||
|
|
status_t parseModifier(const String8& token, int32_t* outMetaState);
|
||
|
|
status_t parseCharacterLiteral(char16_t* outCharacter);
|
||
|
|
};
|
||
|
|
|
||
|
|
static sp<KeyCharacterMap> sEmpty;
|
||
|
|
|
||
|
|
KeyedVector<int32_t, Key*> mKeys;
|
||
|
|
int mType;
|
||
|
|
|
||
|
|
KeyedVector<int32_t, int32_t> mKeysByScanCode;
|
||
|
|
KeyedVector<int32_t, int32_t> mKeysByUsageCode;
|
||
|
|
|
||
|
|
KeyCharacterMap();
|
||
|
|
KeyCharacterMap(const KeyCharacterMap& other);
|
||
|
|
|
||
|
|
bool getKey(int32_t keyCode, const Key** outKey) const;
|
||
|
|
bool getKeyBehavior(int32_t keyCode, int32_t metaState,
|
||
|
|
const Key** outKey, const Behavior** outBehavior) const;
|
||
|
|
static bool matchesMetaState(int32_t eventMetaState, int32_t behaviorMetaState);
|
||
|
|
|
||
|
|
bool findKey(char16_t ch, int32_t* outKeyCode, int32_t* outMetaState) const;
|
||
|
|
|
||
|
|
static status_t load(Tokenizer* tokenizer, Format format, sp<KeyCharacterMap>* outMap);
|
||
|
|
|
||
|
|
static void addKey(Vector<KeyEvent>& outEvents,
|
||
|
|
int32_t deviceId, int32_t keyCode, int32_t metaState, bool down, nsecs_t time);
|
||
|
|
static void addMetaKeys(Vector<KeyEvent>& outEvents,
|
||
|
|
int32_t deviceId, int32_t metaState, bool down, nsecs_t time,
|
||
|
|
int32_t* currentMetaState);
|
||
|
|
static bool addSingleEphemeralMetaKey(Vector<KeyEvent>& outEvents,
|
||
|
|
int32_t deviceId, int32_t metaState, bool down, nsecs_t time,
|
||
|
|
int32_t keyCode, int32_t keyMetaState,
|
||
|
|
int32_t* currentMetaState);
|
||
|
|
static void addDoubleEphemeralMetaKey(Vector<KeyEvent>& outEvents,
|
||
|
|
int32_t deviceId, int32_t metaState, bool down, nsecs_t time,
|
||
|
|
int32_t leftKeyCode, int32_t leftKeyMetaState,
|
||
|
|
int32_t rightKeyCode, int32_t rightKeyMetaState,
|
||
|
|
int32_t eitherKeyMetaState,
|
||
|
|
int32_t* currentMetaState);
|
||
|
|
static void addLockedMetaKey(Vector<KeyEvent>& outEvents,
|
||
|
|
int32_t deviceId, int32_t metaState, nsecs_t time,
|
||
|
|
int32_t keyCode, int32_t keyMetaState,
|
||
|
|
int32_t* currentMetaState);
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace android
|
||
|
|
|
||
|
|
#endif // _LIBINPUT_KEY_CHARACTER_MAP_H
|