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|
/*
* libcaca ASCII-Art library
* Copyright (c) 2002, 2003 Sam Hocevar <sam@zoy.org>
* All Rights Reserved
*
* 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; either
* version 2 of the License, or (at your option) any later version.
*
* 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., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA
*/
/** \file event.c
* \version \$Id: event.c 258 2004-01-26 10:52:30Z sam $
* \author Sam Hocevar <sam@zoy.org>
* \brief Event handling
*
* This file contains event handling functions for keyboard and mouse input.
*/
#include "config.h"
#if defined(USE_SLANG)
# if defined(HAVE_SLANG_SLANG_H)
# include <slang/slang.h>
# else
# include <slang.h>
# endif
#endif
#if defined(USE_NCURSES)
# if defined(HAVE_NCURSES_H)
# include <ncurses.h>
# else
# include <curses.h>
# endif
#endif
#if defined(USE_CONIO)
# include <conio.h>
#endif
#if defined(USE_X11)
# include <X11/Xlib.h>
# include <X11/Xutil.h>
# include <X11/keysym.h>
#endif
#if defined(USE_WIN32)
# include <windows.h>
#endif
#include "caca.h"
#include "caca_internals.h"
static unsigned int _get_next_event(void);
static unsigned int _lowlevel_event(void);
#if defined(USE_SLANG) || defined(USE_NCURSES) || defined(USE_CONIO)
static void _push_event(unsigned int);
static unsigned int _pop_event(void);
#endif
#if !defined(_DOXYGEN_SKIP_ME)
#define EVENTBUF_LEN 10
#endif
#if defined(USE_SLANG) || defined(USE_NCURSES) || defined(USE_CONIO)
static unsigned int eventbuf[EVENTBUF_LEN];
static int events = 0;
#endif
static unsigned int mouse_x = 0, mouse_y = 0;
#if !defined(_DOXYGEN_SKIP_ME)
/* If no new key was pressed after AUTOREPEAT_THRESHOLD usec, assume the
* key was released */
#define AUTOREPEAT_THRESHOLD 200000
/* Start repeating key after AUTOREPEAT_TRIGGER usec and send keypress
* events every AUTOREPEAT_RATE usec. */
#define AUTOREPEAT_TRIGGER 300000
#define AUTOREPEAT_RATE 100000
#endif
/** \brief Get the next mouse or keyboard input event.
*
* This function polls the event queue for mouse or keyboard events matching
* the event mask and returns the first matching event. Non-matching events
* are discarded. \c event_mask must have a non-zero value. This function is
* non-blocking and returns zero if no more events are pending in the queue.
* See also caca_wait_event() for a blocking version of this function.
*
* \param event_mask Bitmask of requested events.
* \return The next matching event in the queue, or 0 if no event is pending.
*/
unsigned int caca_get_event(unsigned int event_mask)
{
if(!event_mask)
return CACA_EVENT_NONE;
for( ; ; )
{
unsigned int event = _get_next_event();
if(!event || event & event_mask)
return event;
}
}
/** \brief Wait for the next mouse or keyboard input event.
*
* This function returns the first mouse or keyboard event in the queue
* that matches the event mask. If no event is pending, it blocks until a
* matching event is received. \c event_mask must have a non-zero value.
* See also caca_get_event() for a non-blocking version of this function.
*
* \param event_mask Bitmask of requested events.
* \return The next event in the queue.
*/
unsigned int caca_wait_event(unsigned int event_mask)
{
if(!event_mask)
return CACA_EVENT_NONE;
for( ; ; )
{
unsigned int event = _get_next_event();
if(event & event_mask)
return event;
_caca_sleep(10000);
}
}
/** \brief Return the X mouse coordinate.
*
* This function returns the X coordinate of the mouse position last time
* it was detected. This function is not reliable if the ncurses or S-Lang
* drivers are being used, because mouse position is only detected when
* the mouse is clicked. Other drivers such as X11 work well.
*
* \return The X mouse coordinate.
*/
unsigned int caca_get_mouse_x(void)
{
if(mouse_x >= _caca_width)
mouse_x = _caca_width - 1;
return mouse_x;
}
/** \brief Return the Y mouse coordinate.
*
* This function returns the Y coordinate of the mouse position last time
* it was detected. This function is not reliable if the ncurses or S-Lang
* drivers are being used, because mouse position is only detected when
* the mouse is clicked. Other drivers such as X11 work well.
*
* \return The Y mouse coordinate.
*/
unsigned int caca_get_mouse_y(void)
{
if(mouse_y >= _caca_height)
mouse_y = _caca_height - 1;
return mouse_y;
}
/*
* XXX: The following functions are local.
*/
static unsigned int _get_next_event(void)
{
#if defined(USE_SLANG) || defined(USE_NCURSES)
static struct caca_timer key_timer = CACA_TIMER_INITIALIZER;
static unsigned int last_key_ticks = 0;
static unsigned int autorepeat_ticks = 0;
static unsigned int last_key = 0;
unsigned int ticks;
#endif
unsigned int event = _lowlevel_event();
#if defined(USE_SLANG)
if(_caca_driver != CACA_DRIVER_SLANG)
#endif
#if defined(USE_NCURSES)
if(_caca_driver != CACA_DRIVER_NCURSES)
#endif
return event;
#if defined(USE_SLANG) || defined(USE_NCURSES)
/* Simulate long keypresses using autorepeat features */
ticks = _caca_getticks(&key_timer);
last_key_ticks += ticks;
autorepeat_ticks += ticks;
/* Handle autorepeat */
if(last_key && autorepeat_ticks > AUTOREPEAT_TRIGGER
&& autorepeat_ticks > AUTOREPEAT_THRESHOLD
&& autorepeat_ticks > AUTOREPEAT_RATE)
{
_push_event(event);
autorepeat_ticks -= AUTOREPEAT_RATE;
return CACA_EVENT_KEY_PRESS | last_key;
}
/* We are in autorepeat mode and the same key was just pressed, ignore
* this event and return the next one by calling ourselves. */
if(event == (CACA_EVENT_KEY_PRESS | last_key))
{
last_key_ticks = 0;
return _get_next_event();
}
/* We are in autorepeat mode, but key has expired or a new key was
* pressed - store our event and return a key release event first */
if(last_key && (last_key_ticks > AUTOREPEAT_THRESHOLD
|| (event & CACA_EVENT_KEY_PRESS)))
{
_push_event(event);
event = CACA_EVENT_KEY_RELEASE | last_key;
last_key = 0;
return event;
}
/* A new key was pressed, enter autorepeat mode */
if(event & CACA_EVENT_KEY_PRESS)
{
last_key_ticks = 0;
autorepeat_ticks = 0;
last_key = event & 0x00ffffff;
}
return event;
#endif
}
static unsigned int _lowlevel_event(void)
{
unsigned int event;
#if defined(USE_SLANG) || defined(USE_NCURSES) || defined(USE_CONIO)
event = _pop_event();
if(event)
return event;
#endif
#if defined(USE_X11)
/* The X11 event check routine */
if(_caca_driver == CACA_DRIVER_X11)
{
XEvent xevent;
char key;
while(XCheckWindowEvent(x11_dpy, x11_window, x11_event_mask, &xevent)
== True)
{
KeySym keysym;
/* Expose event */
if(xevent.type == Expose)
{
XCopyArea(x11_dpy, x11_pixmap, x11_window, x11_gc, 0, 0,
_caca_width * x11_font_width,
_caca_height * x11_font_height, 0, 0);
continue;
}
/* Resize event */
if(xevent.type == ConfigureNotify)
{
unsigned int w, h;
w = (xevent.xconfigure.width + x11_font_width / 3)
/ x11_font_width;
h = (xevent.xconfigure.height + x11_font_height / 3)
/ x11_font_height;
if(!w || !h || (w == _caca_width && h == _caca_height))
continue;
x11_new_width = w;
x11_new_height = h;
if(_caca_resize)
continue;
_caca_resize = 1;
return CACA_EVENT_RESIZE;
}
/* Check for mouse motion events */
if(xevent.type == MotionNotify)
{
unsigned int newx = xevent.xmotion.x / x11_font_width;
unsigned int newy = xevent.xmotion.y / x11_font_height;
if(newx >= _caca_width)
newx = _caca_width - 1;
if(newy >= _caca_height)
newy = _caca_height - 1;
if(mouse_x == newx && mouse_y == newy)
continue;
mouse_x = newx;
mouse_y = newy;
return CACA_EVENT_MOUSE_MOTION | (mouse_x << 12) | mouse_y;
}
/* Check for mouse press and release events */
if(xevent.type == ButtonPress)
return CACA_EVENT_MOUSE_PRESS
| ((XButtonEvent *)&xevent)->button;
if(xevent.type == ButtonRelease)
return CACA_EVENT_MOUSE_RELEASE
| ((XButtonEvent *)&xevent)->button;
/* Check for key press and release events */
if(xevent.type == KeyPress)
event |= CACA_EVENT_KEY_PRESS;
else if(xevent.type == KeyRelease)
event |= CACA_EVENT_KEY_RELEASE;
else
continue;
if(XLookupString(&xevent.xkey, &key, 1, NULL, NULL))
return event | key;
keysym = XKeycodeToKeysym(x11_dpy, xevent.xkey.keycode, 0);
switch(keysym)
{
case XK_F1: return event | CACA_KEY_F1;
case XK_F2: return event | CACA_KEY_F2;
case XK_F3: return event | CACA_KEY_F3;
case XK_F4: return event | CACA_KEY_F4;
case XK_F5: return event | CACA_KEY_F5;
case XK_F6: return event | CACA_KEY_F6;
case XK_F7: return event | CACA_KEY_F7;
case XK_F8: return event | CACA_KEY_F8;
case XK_F9: return event | CACA_KEY_F9;
case XK_F10: return event | CACA_KEY_F10;
case XK_F11: return event | CACA_KEY_F11;
case XK_F12: return event | CACA_KEY_F12;
case XK_F13: return event | CACA_KEY_F13;
case XK_F14: return event | CACA_KEY_F14;
case XK_F15: return event | CACA_KEY_F15;
case XK_Left: return event | CACA_KEY_LEFT;
case XK_Right: return event | CACA_KEY_RIGHT;
case XK_Up: return event | CACA_KEY_UP;
case XK_Down: return event | CACA_KEY_DOWN;
default: return CACA_EVENT_NONE;
}
}
return CACA_EVENT_NONE;
}
else
#endif
#if defined(USE_NCURSES)
if(_caca_driver == CACA_DRIVER_NCURSES)
{
int intkey;
if(_caca_resize_event)
{
_caca_resize_event = 0;
_caca_resize = 1;
return CACA_EVENT_RESIZE;
}
intkey = getch();
if(intkey == ERR)
return CACA_EVENT_NONE;
if(intkey < 0x100)
{
return CACA_EVENT_KEY_PRESS | intkey;
}
if(intkey == KEY_MOUSE)
{
MEVENT mevent;
getmouse(&mevent);
switch(mevent.bstate)
{
case BUTTON1_PRESSED:
_push_event(CACA_EVENT_MOUSE_PRESS | 1);
break;
case BUTTON1_RELEASED:
_push_event(CACA_EVENT_MOUSE_RELEASE | 1);
break;
case BUTTON1_CLICKED:
_push_event(CACA_EVENT_MOUSE_PRESS | 1);
_push_event(CACA_EVENT_MOUSE_RELEASE | 1);
break;
case BUTTON1_DOUBLE_CLICKED:
_push_event(CACA_EVENT_MOUSE_PRESS | 1);
_push_event(CACA_EVENT_MOUSE_RELEASE | 1);
_push_event(CACA_EVENT_MOUSE_PRESS | 1);
_push_event(CACA_EVENT_MOUSE_RELEASE | 1);
break;
case BUTTON1_TRIPLE_CLICKED:
_push_event(CACA_EVENT_MOUSE_PRESS | 1);
_push_event(CACA_EVENT_MOUSE_RELEASE | 1);
_push_event(CACA_EVENT_MOUSE_PRESS | 1);
_push_event(CACA_EVENT_MOUSE_RELEASE | 1);
_push_event(CACA_EVENT_MOUSE_PRESS | 1);
_push_event(CACA_EVENT_MOUSE_RELEASE | 1);
break;
case BUTTON1_RESERVED_EVENT:
break;
case BUTTON2_PRESSED:
_push_event(CACA_EVENT_MOUSE_PRESS | 2);
break;
case BUTTON2_RELEASED:
_push_event(CACA_EVENT_MOUSE_RELEASE | 2);
break;
case BUTTON2_CLICKED:
_push_event(CACA_EVENT_MOUSE_PRESS | 2);
_push_event(CACA_EVENT_MOUSE_RELEASE | 2);
break;
case BUTTON2_DOUBLE_CLICKED:
_push_event(CACA_EVENT_MOUSE_PRESS | 2);
_push_event(CACA_EVENT_MOUSE_RELEASE | 2);
_push_event(CACA_EVENT_MOUSE_PRESS | 2);
_push_event(CACA_EVENT_MOUSE_RELEASE | 2);
break;
case BUTTON2_TRIPLE_CLICKED:
_push_event(CACA_EVENT_MOUSE_PRESS | 2);
_push_event(CACA_EVENT_MOUSE_RELEASE | 2);
_push_event(CACA_EVENT_MOUSE_PRESS | 2);
_push_event(CACA_EVENT_MOUSE_RELEASE | 2);
_push_event(CACA_EVENT_MOUSE_PRESS | 2);
_push_event(CACA_EVENT_MOUSE_RELEASE | 2);
break;
case BUTTON2_RESERVED_EVENT:
break;
case BUTTON3_PRESSED:
_push_event(CACA_EVENT_MOUSE_PRESS | 3);
break;
case BUTTON3_RELEASED:
_push_event(CACA_EVENT_MOUSE_RELEASE | 3);
break;
case BUTTON3_CLICKED:
_push_event(CACA_EVENT_MOUSE_PRESS | 3);
_push_event(CACA_EVENT_MOUSE_RELEASE | 3);
break;
case BUTTON3_DOUBLE_CLICKED:
_push_event(CACA_EVENT_MOUSE_PRESS | 3);
_push_event(CACA_EVENT_MOUSE_RELEASE | 3);
_push_event(CACA_EVENT_MOUSE_PRESS | 3);
_push_event(CACA_EVENT_MOUSE_RELEASE | 3);
break;
case BUTTON3_TRIPLE_CLICKED:
_push_event(CACA_EVENT_MOUSE_PRESS | 3);
_push_event(CACA_EVENT_MOUSE_RELEASE | 3);
_push_event(CACA_EVENT_MOUSE_PRESS | 3);
_push_event(CACA_EVENT_MOUSE_RELEASE | 3);
_push_event(CACA_EVENT_MOUSE_PRESS | 3);
_push_event(CACA_EVENT_MOUSE_RELEASE | 3);
break;
case BUTTON3_RESERVED_EVENT:
break;
case BUTTON4_PRESSED:
_push_event(CACA_EVENT_MOUSE_PRESS | 4);
break;
case BUTTON4_RELEASED:
_push_event(CACA_EVENT_MOUSE_RELEASE | 4);
break;
case BUTTON4_CLICKED:
_push_event(CACA_EVENT_MOUSE_PRESS | 4);
_push_event(CACA_EVENT_MOUSE_RELEASE | 4);
break;
case BUTTON4_DOUBLE_CLICKED:
_push_event(CACA_EVENT_MOUSE_PRESS | 4);
_push_event(CACA_EVENT_MOUSE_RELEASE | 4);
_push_event(CACA_EVENT_MOUSE_PRESS | 4);
_push_event(CACA_EVENT_MOUSE_RELEASE | 4);
break;
case BUTTON4_TRIPLE_CLICKED:
_push_event(CACA_EVENT_MOUSE_PRESS | 4);
_push_event(CACA_EVENT_MOUSE_RELEASE | 4);
_push_event(CACA_EVENT_MOUSE_PRESS | 4);
_push_event(CACA_EVENT_MOUSE_RELEASE | 4);
_push_event(CACA_EVENT_MOUSE_PRESS | 4);
_push_event(CACA_EVENT_MOUSE_RELEASE | 4);
break;
case BUTTON4_RESERVED_EVENT:
break;
default:
break;
}
if(mouse_x == (unsigned int)mevent.x &&
mouse_y == (unsigned int)mevent.y)
return _pop_event();
mouse_x = mevent.x;
mouse_y = mevent.y;
return CACA_EVENT_MOUSE_MOTION | (mouse_x << 12) | mouse_y;
}
event = CACA_EVENT_KEY_PRESS;
switch(intkey)
{
case KEY_UP: return event | CACA_KEY_UP;
case KEY_DOWN: return event | CACA_KEY_DOWN;
case KEY_LEFT: return event | CACA_KEY_LEFT;
case KEY_RIGHT: return event | CACA_KEY_RIGHT;
case KEY_IC: return event | CACA_KEY_INSERT;
case KEY_DC: return event | CACA_KEY_DELETE;
case KEY_HOME: return event | CACA_KEY_HOME;
case KEY_END: return event | CACA_KEY_END;
case KEY_PPAGE: return event | CACA_KEY_PAGEUP;
case KEY_NPAGE: return event | CACA_KEY_PAGEDOWN;
case KEY_F(1): return event | CACA_KEY_F1;
case KEY_F(2): return event | CACA_KEY_F2;
case KEY_F(3): return event | CACA_KEY_F3;
case KEY_F(4): return event | CACA_KEY_F4;
case KEY_F(5): return event | CACA_KEY_F5;
case KEY_F(6): return event | CACA_KEY_F6;
case KEY_F(7): return event | CACA_KEY_F7;
case KEY_F(8): return event | CACA_KEY_F8;
case KEY_F(9): return event | CACA_KEY_F9;
case KEY_F(10): return event | CACA_KEY_F10;
case KEY_F(11): return event | CACA_KEY_F11;
case KEY_F(12): return event | CACA_KEY_F12;
}
return CACA_EVENT_NONE;
}
else
#endif
#if defined(USE_SLANG)
if(_caca_driver == CACA_DRIVER_SLANG)
{
int intkey;
if(_caca_resize_event)
{
_caca_resize_event = 0;
_caca_resize = 1;
return CACA_EVENT_RESIZE;
}
if(!SLang_input_pending(0))
return CACA_EVENT_NONE;
/* We first use SLang_getkey() to see whether Esc was pressed
* alone, then (if it wasn't) we unget the key and use SLkp_getkey()
* instead, so that escape sequences are interpreted. */
intkey = SLang_getkey();
if(intkey != 0x1b /* Esc */ || SLang_input_pending(0))
{
SLang_ungetkey(intkey);
intkey = SLkp_getkey();
}
/* If the key was ASCII, return it immediately */
if(intkey < 0x100)
{
return CACA_EVENT_KEY_PRESS | intkey;
}
if(intkey == 0x3e9)
{
int button = (SLang_getkey() - ' ' + 1) & 0xf;
unsigned int x = SLang_getkey() - '!';
unsigned int y = SLang_getkey() - '!';
_push_event(CACA_EVENT_MOUSE_PRESS | button);
_push_event(CACA_EVENT_MOUSE_RELEASE | button);
if(mouse_x == x && mouse_y == y)
return _pop_event();
mouse_x = x;
mouse_y = y;
return CACA_EVENT_MOUSE_MOTION | (mouse_x << 12) | mouse_y;
}
event = CACA_EVENT_KEY_PRESS;
switch(intkey)
{
case SL_KEY_UP: return event | CACA_KEY_UP;
case SL_KEY_DOWN: return event | CACA_KEY_DOWN;
case SL_KEY_LEFT: return event | CACA_KEY_LEFT;
case SL_KEY_RIGHT: return event | CACA_KEY_RIGHT;
case SL_KEY_IC: return event | CACA_KEY_INSERT;
case SL_KEY_DELETE: return event | CACA_KEY_DELETE;
case SL_KEY_HOME: return event | CACA_KEY_HOME;
case SL_KEY_END: return event | CACA_KEY_END;
case SL_KEY_PPAGE: return event | CACA_KEY_PAGEUP;
case SL_KEY_NPAGE: return event | CACA_KEY_PAGEDOWN;
case SL_KEY_F(1): return event | CACA_KEY_F1;
case SL_KEY_F(2): return event | CACA_KEY_F2;
case SL_KEY_F(3): return event | CACA_KEY_F3;
case SL_KEY_F(4): return event | CACA_KEY_F4;
case SL_KEY_F(5): return event | CACA_KEY_F5;
case SL_KEY_F(6): return event | CACA_KEY_F6;
case SL_KEY_F(7): return event | CACA_KEY_F7;
case SL_KEY_F(8): return event | CACA_KEY_F8;
case SL_KEY_F(9): return event | CACA_KEY_F9;
case SL_KEY_F(10): return event | CACA_KEY_F10;
case SL_KEY_F(11): return event | CACA_KEY_F11;
case SL_KEY_F(12): return event | CACA_KEY_F12;
}
return CACA_EVENT_NONE;
}
else
#endif
#if defined(USE_CONIO)
if(_caca_driver == CACA_DRIVER_CONIO)
{
if(!_conio_kbhit())
return CACA_EVENT_NONE;
event = getch();
_push_event(CACA_EVENT_KEY_RELEASE | event);
return CACA_EVENT_KEY_PRESS | event;
}
else
#endif
#if defined(USE_WIN32)
if(_caca_driver == CACA_DRIVER_WIN32)
{
INPUT_RECORD rec;
DWORD num;
for( ; ; )
{
GetNumberOfConsoleInputEvents(win32_hin, &num);
if(num == 0)
break;
ReadConsoleInput(win32_hin, &rec, 1, &num);
if(rec.EventType == KEY_EVENT)
{
if(rec.Event.KeyEvent.bKeyDown)
event = CACA_EVENT_KEY_PRESS;
else
event = CACA_EVENT_KEY_RELEASE;
if(rec.Event.KeyEvent.uChar.AsciiChar)
return event | rec.Event.KeyEvent.uChar.AsciiChar;
}
if(rec.EventType == MOUSE_EVENT)
{
if(rec.Event.MouseEvent.dwEventFlags == 0)
{
if(rec.Event.MouseEvent.dwButtonState & 0x01)
return CACA_EVENT_MOUSE_PRESS | 0x000001;
if(rec.Event.MouseEvent.dwButtonState & 0x02)
return CACA_EVENT_MOUSE_PRESS | 0x000002;
}
else if(rec.Event.MouseEvent.dwEventFlags == MOUSE_MOVED)
{
COORD pos = rec.Event.MouseEvent.dwMousePosition;
if(mouse_x == (unsigned int)pos.X &&
mouse_y == (unsigned int)pos.Y)
continue;
mouse_x = pos.X;
mouse_y = pos.Y;
return CACA_EVENT_MOUSE_MOTION | (mouse_x << 12) | mouse_y;
}
#if 0
else if(rec.Event.MouseEvent.dwEventFlags == DOUBLE_CLICK)
{
cout << rec.Event.MouseEvent.dwMousePosition.X << "," <<
rec.Event.MouseEvent.dwMousePosition.Y << " " << flush;
}
else if(rec.Event.MouseEvent.dwEventFlags == MOUSE_WHEELED)
{
SetConsoleCursorPosition(hOut,
WheelWhere);
if(rec.Event.MouseEvent.dwButtonState & 0xFF000000)
cout << "Down" << flush;
else
cout << "Up " << flush;
}
#endif
}
/* Unknown event */
return CACA_EVENT_NONE;
}
/* No event */
return CACA_EVENT_NONE;
}
else
#endif
{
/* Dummy */
}
return CACA_EVENT_NONE;
}
#if defined(USE_SLANG) || defined(USE_NCURSES) || defined(USE_CONIO)
static void _push_event(unsigned int event)
{
if(!event || events == EVENTBUF_LEN)
return;
eventbuf[events] = event;
events++;
}
static unsigned int _pop_event(void)
{
int i;
unsigned int event;
if(events == 0)
return CACA_EVENT_NONE;
event = eventbuf[0];
for(i = 1; i < events; i++)
eventbuf[i - 1] = eventbuf[i];
events--;
return event;
}
#endif
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