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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)(const char *label);
enum EKeyboardInsertMode
{
LL_KIM_INSERT,
LL_KIM_OVERWRITE
};
class LLWindowCallbacks;
class LLKeyboard
{
public:
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 U16 os_key, KEY *translated_key);
U16 inverseTranslateKey(const KEY translated_key);
BOOL handleTranslatedKeyUp(KEY translated_key, U32 translated_mask); // Translated into "Linden" keycodes
BOOL handleTranslatedKeyDown(KEY translated_key, U32 translated_mask); // Translated into "Linden" keycodes
virtual BOOL handleKeyUp(const U16 key, MASK mask) = 0;
virtual BOOL handleKeyDown(const U16 key, MASK mask) = 0;
#ifdef LL_DARWIN
// We only actually use this for OS X.
virtual void handleModifier(MASK mask) = 0;
#endif // LL_DARWIN
// 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 stringFromAccelerator( MASK accel_mask ); // separated for convinience, returns with "+": "Shift+" or "Shift+Alt+"...
static std::string stringFromAccelerator( MASK accel_mask, KEY key );
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);
protected:
std::map<U16, KEY> mTranslateKeyMap; // Map of translations from OS keys to Linden KEYs
std::map<KEY, U16> 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;
};
extern LLKeyboard *gKeyboard;
#endif
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