/*

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 keyboard setup, event pump and keyboard and mouse polling

*/

#include "SDL.h"

#include "../../timer/SDL_timer_c.h"

#include "../../events/SDL_sysevents.h"

#include "../../events/SDL_events_c.h"

#include "../SDL_cursor_c.h"

#include "SDL_riscosvideo.h"

#include "SDL_riscosevents_c.h"

#include "memory.h"

#include "stdlib.h"

#include "ctype.h"

#include "kernel.h"

#include "swis.h"

/* The translation table from a RISC OS internal key numbers to a SDL keysym */

static SDLKey RO_keymap[SDLK_LAST];

/* RISC OS Key codes */

#define ROKEY_SHIFT 0

#define ROKEY_CTRL 1

#define ROKEY_ALT 2

/* Left shift is first key we will check for */

#define ROKEY_LEFT_SHIFT 3

/* Need to ignore mouse buttons as they are processed separately */

#define ROKEY_LEFT_MOUSE 9

#define ROKEY_CENTRE_MOUSE 10

#define ROKEY_RIGHT_MOUSE 11

/* No key has been pressed return value*/

#define ROKEY_NONE 255

/* Id of last key in keyboard */

#define ROKEY_LAST_KEY 124

/* Size of array for all keys */

#define ROKEYBD_ARRAYSIZE 125

static char RO_pressed[ROKEYBD_ARRAYSIZE];

static SDL_keysym *TranslateKey(int intkey, SDL_keysym *keysym, int pressed);

void RISCOS_PollMouse(_THIS);

void RISCOS_PollKeyboard();

void RISCOS_PollMouseHelper(_THIS, int fullscreen);

#if SDL_THREADS_DISABLED

extern void DRenderer_FillBuffers();

/* Timer running function */

extern void RISCOS_CheckTimer();

#endif

void FULLSCREEN_PumpEvents(_THIS)

{

/* Current implementation requires keyboard and mouse polling */

RISCOS_PollKeyboard();

RISCOS_PollMouse(this);

#if SDL_THREADS_DISABLED

// DRenderer_FillBuffers();

if (SDL_timer_running) RISCOS_CheckTimer();

#endif

}

void RISCOS_InitOSKeymap(_THIS)

{

int i;

/* Map the VK keysyms */

for ( i=0; i<SDL_arraysize(RO_keymap); ++i )

RO_keymap[i] = SDLK_UNKNOWN;

RO_keymap[3] = SDLK_LSHIFT;

RO_keymap[4] = SDLK_LCTRL;

RO_keymap[5] = SDLK_LALT;

RO_keymap[6] = SDLK_RSHIFT;

RO_keymap[7] = SDLK_RCTRL;

RO_keymap[8] = SDLK_RALT;

RO_keymap[16] = SDLK_q;

RO_keymap[17] = SDLK_3;

RO_keymap[18] = SDLK_4;

RO_keymap[19] = SDLK_5;

RO_keymap[20] = SDLK_F4;

RO_keymap[21] = SDLK_8;

RO_keymap[22] = SDLK_F7;

RO_keymap[23] = SDLK_MINUS,

RO_keymap[25] = SDLK_LEFT;

RO_keymap[26] = SDLK_KP6;

RO_keymap[27] = SDLK_KP7;

RO_keymap[28] = SDLK_F11;

RO_keymap[29] = SDLK_F12;

RO_keymap[30] = SDLK_F10;

RO_keymap[31] = SDLK_SCROLLOCK;

RO_keymap[32] = SDLK_PRINT;

RO_keymap[33] = SDLK_w;

RO_keymap[34] = SDLK_e;

RO_keymap[35] = SDLK_t;

RO_keymap[36] = SDLK_7;

RO_keymap[37] = SDLK_i;

RO_keymap[38] = SDLK_9;

RO_keymap[39] = SDLK_0;

RO_keymap[41] = SDLK_DOWN;

RO_keymap[42] = SDLK_KP8;

RO_keymap[43] = SDLK_KP9;

RO_keymap[44] = SDLK_BREAK;

RO_keymap[45] = SDLK_BACKQUOTE;

/* RO_keymap[46] = SDLK_currency; TODO: Figure out if this has a value */

RO_keymap[47] = SDLK_BACKSPACE;

RO_keymap[48] = SDLK_1;

RO_keymap[49] = SDLK_2;

RO_keymap[50] = SDLK_d;

RO_keymap[51] = SDLK_r;

RO_keymap[52] = SDLK_6;

RO_keymap[53] = SDLK_u;

RO_keymap[54] = SDLK_o;

RO_keymap[55] = SDLK_p;

RO_keymap[56] = SDLK_LEFTBRACKET;

RO_keymap[57] = SDLK_UP;

RO_keymap[58] = SDLK_KP_PLUS;

RO_keymap[59] = SDLK_KP_MINUS;

RO_keymap[60] = SDLK_KP_ENTER;

RO_keymap[61] = SDLK_INSERT;

RO_keymap[62] = SDLK_HOME;

RO_keymap[63] = SDLK_PAGEUP;

RO_keymap[64] = SDLK_CAPSLOCK;

RO_keymap[65] = SDLK_a;

RO_keymap[66] = SDLK_x;

RO_keymap[67] = SDLK_f;

RO_keymap[68] = SDLK_y;

RO_keymap[69] = SDLK_j;

RO_keymap[70] = SDLK_k;

RO_keymap[72] = SDLK_SEMICOLON;

RO_keymap[73] = SDLK_RETURN;

RO_keymap[74] = SDLK_KP_DIVIDE;

RO_keymap[76] = SDLK_KP_PERIOD;

RO_keymap[77] = SDLK_NUMLOCK;

RO_keymap[78] = SDLK_PAGEDOWN;

RO_keymap[79] = SDLK_QUOTE;

RO_keymap[81] = SDLK_s;

RO_keymap[82] = SDLK_c;

RO_keymap[83] = SDLK_g;

RO_keymap[84] = SDLK_h;

RO_keymap[85] = SDLK_n;

RO_keymap[86] = SDLK_l;

RO_keymap[87] = SDLK_SEMICOLON;

RO_keymap[88] = SDLK_RIGHTBRACKET;

RO_keymap[89] = SDLK_DELETE;

RO_keymap[90] = SDLK_KP_MINUS;

RO_keymap[91] = SDLK_KP_MULTIPLY;

RO_keymap[93] = SDLK_EQUALS;

RO_keymap[94] = SDLK_BACKSLASH;

RO_keymap[96] = SDLK_TAB;

RO_keymap[97] = SDLK_z;

RO_keymap[98] = SDLK_SPACE;

RO_keymap[99] = SDLK_v;

RO_keymap[100] = SDLK_b;

RO_keymap[101] = SDLK_m;

RO_keymap[102] = SDLK_COMMA;

RO_keymap[103] = SDLK_PERIOD;

RO_keymap[104] = SDLK_SLASH;

RO_keymap[105] = SDLK_END;

RO_keymap[106] = SDLK_KP0;

RO_keymap[107] = SDLK_KP1;

RO_keymap[108] = SDLK_KP3;

RO_keymap[112] = SDLK_ESCAPE;

RO_keymap[113] = SDLK_F1;

RO_keymap[114] = SDLK_F2;

RO_keymap[115] = SDLK_F3;

RO_keymap[116] = SDLK_F5;

RO_keymap[117] = SDLK_F6;

RO_keymap[118] = SDLK_F8;

RO_keymap[119] = SDLK_F9;

RO_keymap[120] = SDLK_HASH;

RO_keymap[121] = SDLK_RIGHT;

RO_keymap[122] = SDLK_KP4;

RO_keymap[123] = SDLK_KP5;

RO_keymap[124] = SDLK_KP2;

SDL_memset(RO_pressed, 0, ROKEYBD_ARRAYSIZE);

}

/* Variable for mouse relative processing */

int mouse_relative = 0;

/* Check to see if we need to enter or leave mouse relative mode */

void RISCOS_CheckMouseMode(_THIS)

{

/* If the mouse is hidden and input is grabbed, we use relative mode */

if ( !(SDL_cursorstate & CURSOR_VISIBLE) &&

(this->input_grab != SDL_GRAB_OFF) ) {

mouse_relative = 1;

} else {

mouse_relative = 0;

}

}

void RISCOS_PollMouse(_THIS)

{

RISCOS_PollMouseHelper(this, 1);

}

extern int mouseInWindow;

void WIMP_PollMouse(_THIS)

{

/* Only poll when mouse is over the window */

if (!mouseInWindow) return;

RISCOS_PollMouseHelper(this, 0);

}

/* Static variables so only changes are reported */

static Sint16 last_x = -1, last_y = -1;

static int last_buttons = 0;

/* Share routine between WIMP and FULLSCREEN for polling mouse and

passing on events */

void RISCOS_PollMouseHelper(_THIS, int fullscreen)

{

_kernel_swi_regs regs;

static int starting = 1;

if (_kernel_swi(OS_Mouse, &regs, &regs) == NULL)

{

Sint16 new_x = regs.r[0]; /* Initialy get as OS units */

Sint16 new_y = regs.r[1];

/* Discard mouse events until they let go of the mouse after starting */

if (starting && regs.r[2] != 0)

return;

else

starting = 0;

if (new_x != last_x || new_y != last_y || last_buttons != regs.r[2])

{

/* Something changed so generate appropriate events */

int topLeftX, topLeftY; /* Top left OS units */

int x, y; /* Mouse position in SDL pixels */

if (fullscreen)

{

topLeftX = 0;

topLeftY = (this->hidden->height << this->hidden->yeig) - 1;

} else

{

int window_state[9];

/* Get current window state */

window_state[0] = this->hidden->window_handle;

regs.r[1] = (unsigned int)window_state;

_kernel_swi(Wimp_GetWindowState, &regs, &regs);

topLeftX = window_state[1];

topLeftY = window_state[4];

}

/* Convert co-ordinates to workspace */

x = new_x - topLeftX;

y = topLeftY - new_y; /* Y goes from top of window/screen */

/* Convert OS units to pixels */

x >>= this->hidden->xeig;

y >>= this->hidden->yeig;

if (last_x != new_x || last_y != new_y)

{

if (mouse_relative)

{

int centre_x = SDL_VideoSurface->w/2;

int centre_y = SDL_VideoSurface->h/2;

if (centre_x != x || centre_y != y)

{

if (SDL_VideoSurface) SDL_PrivateMouseMotion(0,1,x - centre_x, y - centre_y);

last_x = topLeftX + (centre_x << this->hidden->xeig);

last_y = topLeftY - (centre_y << this->hidden->yeig);

/* Re-centre the mouse pointer, so we still get relative

movement when the mouse is at the edge of the window

or screen.

*/

{

unsigned char block[5];

block[0] = 3; /* OSWORD move pointer sub-reason code */

block[1] = last_x & 0xFF;

block[2] = (last_x >> 8) & 0xFF;

block[3] = last_y & 0xFF;

block[4] = (last_y >> 8) & 0xFF;

regs.r[0] = 21; /* OSWORD pointer stuff code */

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

_kernel_swi(OS_Word, &regs, &regs);

}

}

} else

{

last_x = new_x;

last_y = new_y;

SDL_PrivateMouseMotion(0,0,x,y);

}

}

if (last_buttons != regs.r[2])

{

int changed = last_buttons ^ regs.r[2];

last_buttons = regs.r[2];

if (changed & 4) SDL_PrivateMouseButton((last_buttons & 4) ? SDL_PRESSED : SDL_RELEASED, SDL_BUTTON_LEFT, 0, 0);

if (changed & 2) SDL_PrivateMouseButton((last_buttons & 2) ? SDL_PRESSED : SDL_RELEASED, SDL_BUTTON_MIDDLE, 0, 0);

if (changed & 1) SDL_PrivateMouseButton((last_buttons & 1) ? SDL_PRESSED : SDL_RELEASED, SDL_BUTTON_RIGHT, 0, 0);

}

}

}

}

void RISCOS_PollKeyboard()

{

int which_key = ROKEY_LEFT_SHIFT;

int j;

int min_key, max_key;

SDL_keysym key;

/* Scan the keyboard to see what is pressed */

while (which_key <= ROKEY_LAST_KEY)

{

which_key = (_kernel_osbyte(121, which_key, 0) & 0xFF);

if (which_key != ROKEY_NONE)

{

switch(which_key)

{

/* Skip over mouse keys */

case ROKEY_LEFT_MOUSE:

case ROKEY_CENTRE_MOUSE:

case ROKEY_RIGHT_MOUSE:

which_key = ROKEY_RIGHT_MOUSE;

break;

/* Ignore keys that cause 2 internal number to be generated */

case 71: case 24: case 87: case 40:

break;

/* Ignore break as it can be latched on */

case 44:

break;

default:

RO_pressed[which_key] += 2;

break;

}

which_key++;

}

}

/* Generate key released messages */

min_key = ROKEY_LAST_KEY+1;

max_key = ROKEY_LEFT_SHIFT;

for (j = ROKEY_LEFT_SHIFT; j <= ROKEY_LAST_KEY; j++)

{

if (RO_pressed[j])

{

if (RO_pressed[j] == 1)

{

RO_pressed[j] = 0;

SDL_PrivateKeyboard(SDL_RELEASED, TranslateKey(j,&key,0));

} else

{

if (j < min_key) min_key = j;

if (j > max_key) max_key = j;

}

}

}

/* Generate key pressed messages */

for (j = min_key; j <= max_key; j++)

{

if (RO_pressed[j])

{

if (RO_pressed[j] == 2)

{

SDL_PrivateKeyboard(SDL_PRESSED,TranslateKey(j,&key,1));

}

RO_pressed[j] = 1;

}

}

}

static SDL_keysym *TranslateKey(int intkey, SDL_keysym *keysym, int pressed)

{

/* Set the keysym information */

keysym->scancode = (unsigned char) intkey;

keysym->sym = RO_keymap[intkey];

keysym->mod = KMOD_NONE;

keysym->unicode = 0;

if ( pressed && SDL_TranslateUNICODE )

{

int state;

int ch;

state = (_kernel_osbyte(202, 0, 255) & 0xFF);

/*TODO: Take into account other keyboard layouts */

ch = keysym->sym; /* This should handle most unshifted keys */

if (intkey < 9 || ch == SDLK_UNKNOWN)

{

ch = 0;

} else if (state & 64) /* Control on */

{

ch = ch & 31;

} else

{

int topOfKey = 0;

if (state & 8) /* Shift on */

{

topOfKey = 1;

}

if ((state & 16) == 0) /* Caps lock is on */

{

if (ch >= SDLK_a && ch <= SDLK_z)

{

if ((state & 128) == 0) /* Shift Enable off */

{

/* All letter become upper case */

topOfKey = 1;

} else

{

/* Shift+Letters gives lower case */

topOfKey = 1 - topOfKey;

}

}

}

if (topOfKey)

{

/* Key produced with shift held down */

/* Letters just give upper case version */

if (ch >= SDLK_a && ch <= SDLK_z) ch = toupper(ch);

else

{

switch(ch)

{

case SDLK_HASH: ch = '~'; break;

case SDLK_QUOTE: ch = '@'; break;

case SDLK_COMMA: ch = '<'; break;

case SDLK_MINUS: ch = '_'; break;

case SDLK_PERIOD: ch = '>'; break;

case SDLK_SLASH: ch = '?'; break;

case SDLK_0: ch = ')'; break;

case SDLK_1: ch = '!'; break;

case SDLK_2: ch = '"'; break;

case SDLK_3: ch = '£'; break;

case SDLK_4: ch = '$'; break;

case SDLK_5: ch = '%'; break;

case SDLK_6: ch = '^'; break;

case SDLK_7: ch = '&'; break;

case SDLK_8: ch = '*'; break;

case SDLK_9: ch = '('; break;

case SDLK_SEMICOLON: ch = ':'; break;

case SDLK_EQUALS: ch = '+'; break;

case SDLK_LEFTBRACKET: ch = '{'; break;

case SDLK_BACKSLASH: ch = '|'; break;

case SDLK_RIGHTBRACKET: ch = '}'; break;

case SDLK_BACKQUOTE: ch = '¬'; break;

default:

ch = 0; /* Map to zero character if we don't understand it */

break;

}

}

} else if (ch > 126)

{

/* SDL key code < 126 map directly onto their Unicode equivalents */

/* Keypad 0 to 9 maps to numeric equivalent */

if (ch >= SDLK_KP0 && ch <= SDLK_KP9) ch = ch - SDLK_KP0 + '0';

else

{

/* Following switch maps other keys that produce an Ascii value */

switch(ch)

{

case SDLK_KP_PERIOD: ch = '.'; break;

case SDLK_KP_DIVIDE: ch = '/'; break;

case SDLK_KP_MULTIPLY: ch = '*'; break;

case SDLK_KP_MINUS: ch = '-'; break;

case SDLK_KP_PLUS: ch = '+'; break;

case SDLK_KP_EQUALS: ch = '='; break;

default:

/* If we don't know what it is set the Unicode to 0 */

ch = 0;

break;

}

}

}

}

keysym->unicode = ch;

}

return(keysym);

}

/* end of SDL_riscosevents.c ... */