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/**
* @file llkeyboard.h
* @brief Handler for assignable key bindings
*
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#ifndef LL_LLKEYBOARD_H
#define LL_LLKEYBOARD_H
#include <map>
#include <boost/function.hpp>
#include "llstringtable.h"
#include "lltimer.h"
#include "indra_constants.h"
enum EKeystate
{
KEYSTATE_DOWN,
KEYSTATE_LEVEL,
KEYSTATE_UP
};
typedef boost::function<bool(EKeystate keystate)> LLKeyFunc;
typedef std::string (LLKeyStringTranslatorFunc)(std::string_view);
enum EKeyboardInsertMode
{
LL_KIM_INSERT,
LL_KIM_OVERWRITE
};
class LLWindowCallbacks;
class LLKeyboard
{
public:
#ifdef LL_USE_SDL_KEYBOARD
// linux relies on SDL2 which uses U32 for its native key type
typedef U32 NATIVE_KEY_TYPE;
#else
// on non-linux platforms we can get by with a smaller native key type
typedef U16 NATIVE_KEY_TYPE;
#endif
LLKeyboard();
virtual ~LLKeyboard();
void resetKeyDownAndHandle();
void resetKeys();
F32 getCurKeyElapsedTime() { return getKeyDown(mCurScanKey) ? getKeyElapsedTime( mCurScanKey ) : 0.f; }
F32 getCurKeyElapsedFrameCount() { return getKeyDown(mCurScanKey) ? (F32)getKeyElapsedFrameCount( mCurScanKey ) : 0.f; }
bool getKeyDown(const KEY key) { return mKeyLevel[key]; }
bool getKeyRepeated(const KEY key) { return mKeyRepeated[key]; }
bool translateKey(const NATIVE_KEY_TYPE os_key, KEY *translated_key);
NATIVE_KEY_TYPE inverseTranslateKey(const KEY translated_key);
bool handleTranslatedKeyUp(KEY translated_key, MASK translated_mask); // Translated into "Linden" keycodes
bool handleTranslatedKeyDown(KEY translated_key, MASK translated_mask); // Translated into "Linden" keycodes
virtual bool handleKeyUp(const NATIVE_KEY_TYPE key, MASK mask) = 0;
virtual bool handleKeyDown(const NATIVE_KEY_TYPE key, MASK mask) = 0;
virtual void handleModifier(MASK mask) { }
// Asynchronously poll the control, alt, and shift keys and set the
// appropriate internal key masks.
virtual void resetMaskKeys() = 0;
virtual void scanKeyboard() = 0; // scans keyboard, calls functions as necessary
// Mac must differentiate between Command = Control for keyboard events
// and Command != Control for mouse events.
virtual MASK currentMask(bool for_mouse_event) = 0;
virtual KEY currentKey() { return mCurTranslatedKey; }
EKeyboardInsertMode getInsertMode() { return mInsertMode; }
void toggleInsertMode();
static bool maskFromString(const std::string& str, MASK *mask); // False on failure
static bool keyFromString(const std::string& str, KEY *key); // False on failure
static std::string stringFromKey(KEY key, bool translate = true);
static std::string stringFromMouse(EMouseClickType click, bool translate = true);
static std::string stringFromAccelerator( MASK accel_mask ); // separated for convinience, returns with "+": "Shift+" or "Shift+Alt+"...
static std::string stringFromAccelerator( MASK accel_mask, KEY key );
static std::string stringFromAccelerator(MASK accel_mask, EMouseClickType click);
void setCallbacks(LLWindowCallbacks *cbs) { mCallbacks = cbs; }
F32 getKeyElapsedTime( KEY key ); // Returns time in seconds since key was pressed.
S32 getKeyElapsedFrameCount( KEY key ); // Returns time in frames since key was pressed.
static void setStringTranslatorFunc( LLKeyStringTranslatorFunc *trans_func );
protected:
void addKeyName(KEY key, const std::string& name);
virtual MASK updateModifiers(const MASK mask) { return mask; }
protected:
std::map<NATIVE_KEY_TYPE, KEY> mTranslateKeyMap; // Map of translations from OS keys to Linden KEYs
std::map<KEY, NATIVE_KEY_TYPE> mInvTranslateKeyMap; // Map of translations from Linden KEYs to OS keys
LLWindowCallbacks *mCallbacks;
LLTimer mKeyLevelTimer[KEY_COUNT]; // Time since level was set
S32 mKeyLevelFrameCount[KEY_COUNT]; // Frames since level was set
bool mKeyLevel[KEY_COUNT]; // Levels
bool mKeyRepeated[KEY_COUNT]; // Key was repeated
bool mKeyUp[KEY_COUNT]; // Up edge
bool mKeyDown[KEY_COUNT]; // Down edge
KEY mCurTranslatedKey;
KEY mCurScanKey; // Used during the scanKeyboard()
static LLKeyStringTranslatorFunc* mStringTranslator; // Used for l10n + PC/Mac/Linux accelerator labeling
EKeyboardInsertMode mInsertMode;
static std::map<KEY,std::string> sKeysToNames;
static std::map<std::string,KEY> sNamesToKeys;
};
// Interface to get key from assigned command
class LLKeyBindingToStringHandler
{
public:
virtual std::string getKeyBindingAsString(const std::string& mode, const std::string& control) const = 0;
};
extern LLKeyboard *gKeyboard;
#endif
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