/*

SDL - Simple DirectMedia Layer

Copyright (C) 1997-2004 Sam Lantinga

This library is free software; you can redistribute it and/or

modify it under the terms of the GNU Library 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

Library General Public License for more details.

You should have received a copy of the GNU Library General Public

License along with this library; if not, write to the Free

Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

Sam Lantinga

slouken@libsdl.org

*/

/*

File added by Alan Buckley (alan_baa@hotmail.com) for RISC OS compatability

27 March 2003

Implements Pumping of events and WIMP polling

*/

#include "SDL.h"

#include "SDL_syswm.h"

#include "SDL_sysevents.h"

#include "SDL_events_c.h"

#include "SDL_riscosvideo.h"

#include "SDL_riscosevents_c.h"

#include "SDL_riscosmouse_c.h"

#include "SDL_timer_c.h"

#include "memory.h"

#include "stdlib.h"

#include "ctype.h"

#include "kernel.h"

#include "swis.h"

#include "unixlib/os.h"

#ifndef DISABLE_THREADS

#include <pthread.h>

#endif

/* Local functions */

void WIMP_Poll(_THIS, int waitTime);

void WIMP_SetFocus(int win);

/* SDL_riscossprite functions */

void WIMP_PlotSprite(_THIS, int x, int y);

void WIMP_ModeChanged(_THIS);

void WIMP_PaletteChanged(_THIS);

extern void WIMP_PollMouse(_THIS);

extern void RISCOS_PollKeyboard();

#ifdef DISABLE_THREADS

/* Timer running function */

extern void RISCOS_CheckTimer();

#else

extern int riscos_using_threads;

#endif

/* Mouse cursor handling */

extern void WIMP_ReshowCursor(_THIS);

extern void WIMP_RestoreWimpCursor();

int hasFocus = 0;

int mouseInWindow = 0;

/* Flag to ensure window is correct size after a mode change */

static int resizeOnOpen = 0;

void WIMP_PumpEvents(_THIS)

{

WIMP_Poll(this, 0);

if (hasFocus) RISCOS_PollKeyboard();

if (mouseInWindow) WIMP_PollMouse(this);

#ifdef DISABLE_THREADS

if (SDL_timer_running) RISCOS_CheckTimer();

#endif

}

void WIMP_Poll(_THIS, int waitTime)

{

_kernel_swi_regs regs;

int message[64];

unsigned int code;

int pollMask = 0;

int doPoll = 1;

int sysEvent;

int sdlWindow = this->hidden->window_handle;

if (this->PumpEvents != WIMP_PumpEvents) return;

if (waitTime > 0)

{

_kernel_swi(OS_ReadMonotonicTime, &regs, &regs);

waitTime += regs.r[0];

}

while (doPoll)

{

#ifndef DISABLE_THREADS

/* Stop thread callbacks while program is paged out */

if (riscos_using_threads) __pthread_stop_ticker();

#endif

if (waitTime <= 0)

{

regs.r[0] = pollMask; /* Poll Mask */

/* For no wait time mask out null event so we wait until something happens */

if (waitTime < 0) regs.r[0] |= 1;

regs.r[1] = (int)message;

_kernel_swi(Wimp_Poll, &regs, &regs);

} else

{

regs.r[0] = pollMask;

regs.r[1] = (int)message;

regs.r[2] = waitTime;

_kernel_swi(Wimp_PollIdle, &regs, &regs);

}

/* Flag to specify if we post a SDL_SysWMEvent */

sysEvent = 0;

code = (unsigned int)regs.r[0];

switch(code)

{

case 0: /* Null Event - drop out for standard processing*/

doPoll = 0;

break;

case 1: /* Redraw window */

_kernel_swi(Wimp_RedrawWindow, &regs,&regs);

if (message[0] == sdlWindow)

{

while (regs.r[0])

{

WIMP_PlotSprite(this, message[1], message[2]);

_kernel_swi(Wimp_GetRectangle, &regs, &regs);

}

} else

{

/* TODO: Currently we just eat them - we may need to pass them on */

while (regs.r[0])

{

_kernel_swi(Wimp_GetRectangle, &regs, &regs);

}

}

break;

case 2: /* Open window */

if ( resizeOnOpen && message[0] == sdlWindow)

{

/* Ensure window is correct size */

resizeOnOpen = 0;

message[3] = message[1] + (this->screen->w << this->hidden->xeig);

message[4] = message[2] + (this->screen->h << this->hidden->yeig);

}

_kernel_swi(Wimp_OpenWindow, &regs, &regs);

break;

case 3: /* Close window */

if (message[0] == sdlWindow)

{

/* Documentation makes it looks as if the following line is correct:

** if (SDL_PrivateQuit() == 1) _kernel_swi(Wimp_CloseWindow, &regs, &regs);

** However some programs don't process this message and so sit there invisibly

** in the background so I just post the quit message and hope the application

** does the correct thing.

*/

SDL_PrivateQuit();

} else

sysEvent = 1;

doPoll = 0;

break;

case 4: /* Pointer_Leaving_Window */

if (message[0] == sdlWindow)

{

mouseInWindow = 0;

//TODO: Lose buttons / dragging

/* Reset to default pointer */

WIMP_RestoreWimpCursor();

SDL_PrivateAppActive(0, SDL_APPMOUSEFOCUS);

} else

sysEvent = 1;

break;

case 5: /* Pointer_Entering_Window */

if (message[0] == sdlWindow)

{

mouseInWindow = 1;

WIMP_ReshowCursor(this);

SDL_PrivateAppActive(1, SDL_APPMOUSEFOCUS);

} else sysEvent = 1;

break;

case 6: /* Mouse_Click */

if (hasFocus == 0)

{

/* First click gives focus if it's not a menu */

/* we only count non-menu clicks on a window that has the focus */

WIMP_SetFocus(message[3]);

} else

doPoll = 0; // So PollMouse gets a chance to pick it up

break;

case 7: /* User_Drag_Box - Used for mouse release */

//TODO: May need to implement this in the future

sysEvent = 1;

break;

case 8: /* Keypressed */

doPoll = 0; /* PollKeyboard should pick it up */

if (message[0] != sdlWindow) sysEvent = 1;

/*TODO: May want to always pass F12 etc to the wimp

{

regs.r[0] = message[6];

_kernel_swi(Wimp_ProcessKey, &regs, &regs);

}

*/

break;

case 11: /* Lose Caret */

hasFocus = 0;

if (message[0] == sdlWindow) SDL_PrivateAppActive(0, SDL_APPINPUTFOCUS);

else sysEvent = 1;

break;

case 12: /* Gain Caret */

hasFocus = 1;

if (message[0] == sdlWindow) SDL_PrivateAppActive(1, SDL_APPINPUTFOCUS);

else sysEvent = 1;

break;

case 17:

case 18:

sysEvent = 1; /* All messages are passed on */

switch(message[4])

{

case 0: /* Quit Event */

/* No choice - have to quit */

SDL_Quit();

exit(0);

break;

case 8: /* Pre Quit */

SDL_PrivateQuit();

break;

case 0x400c1: /* Mode change */

WIMP_ModeChanged(this);

resizeOnOpen = 1;

break;

case 9: /* Palette changed */

WIMP_PaletteChanged(this);

break;

}

break;

default:

/* Pass unknown events on */

sysEvent = 1;

break;

}

if (sysEvent)

{

SDL_SysWMmsg wmmsg;

SDL_VERSION(&wmmsg.version);

wmmsg.eventCode = code;

SDL_memcpy(wmmsg.pollBlock, message, 64 * sizeof(int));

/* Fall out of polling loop if message is successfully posted */

if (SDL_PrivateSysWMEvent(&wmmsg)) doPoll = 0;

}

#ifndef DISABLE_THREADS

if (riscos_using_threads)

{

/* Restart ticker here so other thread can not interfere

with the Redraw processing */

if (riscos_using_threads) __pthread_start_ticker();

/* Give other threads a better chance of running */

pthread_yield();

}

#endif

}

}

/* Set focus to specified window */

void WIMP_SetFocus(int win)

{

_kernel_swi_regs regs;

regs.r[0] = win;

regs.r[1] = -1; /* Icon handle */

regs.r[2] = 0; /* X-offset we just put it at position 0 */

regs.r[3] = 0; /* Y-offset as above */

regs.r[4] = 1 << 25; /* Caret is invisible */

regs.r[5] = 0; /* index into string */

_kernel_swi(Wimp_SetCaretPosition, &regs, &regs);

}

/** Run background task while in a sleep command */

void RISCOS_BackgroundTasks(void)

{

if (current_video && current_video->hidden->window_handle)

{

WIMP_Poll(current_video, 0);

}

#ifdef DISABLE_THREADS

if (SDL_timer_running) RISCOS_CheckTimer();

#endif

}