netsurf/atari/browser.c

/*
 * Copyright 2010 Ole Loots <ole@monochrom.net>
 *
 * This file is part of NetSurf, http://www.netsurf-browser.org/
 *
 * NetSurf is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * NetSurf 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <limits.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdbool.h>
#include <assert.h>
#include <windom.h>
#include <cflib.h>

#include "desktop/gui.h"
#include "desktop/netsurf.h"
#include "desktop/browser.h"
#include "desktop/mouse.h"
#include "desktop/textinput.h"
#include "utils/log.h"
#include "utils/messages.h"

#include "atari/gui.h"
#include "atari/browser_win.h"
#include "atari/misc.h"
#include "atari/global_evnt.h"
#include "atari/browser_win.h"
#include "atari/res/netsurf.rsh"
#include "atari/browser.h"
#include "atari/plot/plotter.h"
#include "atari/plot.h"
#include "atari/font.h"

extern browser_mouse_state bmstate;
extern GEM_PLOTTER plotter;
extern struct gui_window *input_window;


static void __CDECL browser_evnt_wdestroy( WINDOW * c, short buff[8], void * data);
COMPONENT *comp_widget_create( APPvar *app, WINDOW *win, int size, int flex );

static bool frameinit = true;


/* create an browser component */
struct s_browser * browser_create(  struct gui_window * gw, 
									struct browser_window *bw, 
									struct browser_window * clone, 
									enum browser_type type, 
									int lt, int w, int flex )
{
	LGRECT cwork;
	COMPONENT * scrollv, * scrollh, * drawable;

	if( frameinit ) {
		mt_FrameInit( &app );
		frameinit = false;
	}

	CMP_BROWSER bnew = (CMP_BROWSER)malloc( sizeof(struct s_browser) );
	if( bnew )
	{
		memset(bnew, 0, sizeof(struct s_browser) );
		bnew->type = type;
		bnew->bw = bw;
		bnew->attached = false;
		if(clone)
			bw->scale = clone->scale;
		else
			bw->scale = 1;

		bnew->compwin = mt_WindCreate( &app, VSLIDE|HSLIDE, 40, 40, app.w, app.h);
		bnew->compwin->w_u = 1;
		bnew->compwin->h_u = 1;
		/* needs to be adjusted when content width is known: */
		bnew->compwin->ypos_max = w; 
		bnew->compwin->xpos_max = w;
		mt_WindSlider( &app, bnew->compwin, HSLIDER|VSLIDER);
		bnew->comp = (COMPONENT*)comp_widget_create( (void*)&app, (WINDOW*)bnew->compwin, 100, 1 ); 
		if( bnew->comp == NULL ) {
			free(bnew);
			return(NULL);
		}
		mt_EvntDataAdd( &app, bnew->compwin, WM_XBUTTON, 
							browser_evnt_mbutton, (void*)gw, EV_BOT );
		mt_CompEvntDataAttach( &app, bnew->comp, WM_REDRAW, 
								browser_evnt_redraw, (void*)gw );
		mt_EvntDataAttach( &app, bnew->compwin , WM_REDRAW, browser_evnt_redraw_x, NULL );
		mt_EvntDataAttach( &app, bnew->compwin, WM_SLIDEXY, 
								browser_evnt_slider, gw );
		mt_EvntDataAttach( &app, bnew->compwin, WM_ARROWED, 
								browser_evnt_arrowed, gw );	
		mt_CompEvntDataAttach( &app, bnew->comp, WM_DESTROY, 
								browser_evnt_destroy, (void*)bnew );
		/* just stub, as an reminder: */
		mt_EvntDataAttach( &app, bnew->compwin, WM_DESTROY, 
								browser_evnt_wdestroy, (void*)bnew );

		mt_CompDataAttach( &app, bnew->comp, CDT_OWNER, gw ); 
	}
	return( bnew );
}

bool browser_destroy( struct s_browser * b )
{
	short type = BT_ROOT;
	LGRECT restore;
	/* only free the components if it is an root browser,
		this should delete all attached COMPONENTS... 
	*/

	LOG(("%s (%s)\n", b->bw->name,  (b->type == BT_ROOT) ? "ROOT" : "FRAME"));
	assert( b != NULL );
	assert( b->comp != NULL );
	assert( b->bw != NULL );
	struct gui_window * rootgw = browser_find_root( b->bw->window );

	if( b->type == BT_ROOT ) {
		
	} else if( BT_FRAME ){
		type = BT_FRAME;
	} else {
		assert( 1 == 0 ); 
	}

	if( b->compwin != NULL ){
		COMPONENT * old = b->comp;
		WINDOW * oldwin = b->compwin;
		b->comp = NULL;
		b->compwin = NULL;
		/* Im not sure if this is the right thing to do (after compdelete above,... */
		/* listRemove should be used when we just remove an frame... */
		/* (I encountered spurious events when not doing that...) */
		/* listRemove( (LINKABLE*) oldwin ); */
		/* listRemove( (LINKABLE*) old ); */
		WindDelete( oldwin );
		mt_CompDelete(&app,  old );	
	}

	if( type == BT_FRAME ) {
		/* TODO: restore the remaining frameset (rebuild???) */
	}
	return( true );
}

bool browser_attach_frame( struct gui_window * container, struct gui_window * frame )
{
	struct browser_window * cbw = container->browser->bw;
	int lt = CLT_STACK;
	if (cbw->rows >= cbw->cols)
		lt = CLT_VERTICAL;
	else 
		lt = CLT_HORIZONTAL;
	/* todo: if first frame, destroy compwin, create browser frame with old component interface :/ */
	mt_CompAttach( &app,  container->browser->comp, frame->browser->comp );
	container->browser->comp->type = lt;
	browser_update_rects( container );
	container->browser->attached = true;
	/*browser_update_rects( frame );
	  LGRECT brect;
	  browser_get_rect( frame, BR_CONTENT, &brect ); 
	*/
	
}

/* find the root of an frame ( or just return gw if is already the root) */
struct gui_window * browser_find_root( struct gui_window * gw )
{
	if( gw->parent == NULL )
		return( gw ); 
	struct gui_window * g;
	for( g=window_list; g; g=g->next){
		if( g->root == gw->root && g->parent == NULL )
			return( g );
	}
	return( NULL );
}

void browser_get_rect( struct gui_window * gw, enum browser_rect type, LGRECT * out)
{
	GRECT work;
	assert( out != NULL);
	int slider_v_w = 20;
	int slider_v_h = 22;
	int slider_h_w = 20;
	int slider_h_h = 22;

	WindGetGrect( gw->browser->compwin, WF_WORKXYWH, &work);
	if( type == BR_CONTENT ){
		out->g_w = work.g_w;
		out->g_h = work.g_h;
		out->g_x = work.g_x;
		out->g_y = work.g_y;
		return;
	}
	
	LGRECT cur;
	mt_CompGetLGrect(&app, gw->browser->comp, WF_WORKXYWH, &cur);
	if( type == BR_HSLIDER ){
		out->g_x = cur.g_x;
		out->g_y = cur.g_y + work.g_h;
		out->g_h = cur.g_h - work.g_h;
		out->g_w = cur.g_w;
	}

	if( type == BR_VSLIDER ){
		out->g_x = cur.g_x + work.g_w;
		out->g_y = cur.g_y;
		out->g_w = cur.g_w - work.g_w;
		out->g_h = work.g_h;
	}

}

/* Report an resize to the COMPONENT interface */
void browser_update_rects(struct gui_window * gw )
{
	short buff[8];
	LGRECT cmprect;
	mt_WindGetGrect( &app, gw->root->handle, WF_CURRXYWH, (GRECT*)&buff[4]);
	buff[0] = CM_REFLOW;
	buff[1] = _AESapid;
	buff[2] = 0;
	EvntExec(gw->root->handle, buff);
}

void browser_set_content_size(struct gui_window * gw, int w, int h)
{
	CMP_BROWSER b = gw->browser;
	b->compwin->ypos = 0;
	b->compwin->xpos = 0;
	b->compwin->ypos_max = h;
	b->compwin->xpos_max = w;
	/* TODO: instead of zeroin, recalculate scroll? */
	browser_scroll(gw, WA_LFLINE, 0, true );
	browser_scroll(gw, WA_UPLINE, 0, true );
	/* force update of scrollbars: */
	b->scroll.required = true;
}

static void __CDECL browser_evnt_wdestroy( WINDOW * c, short buff[8], void * data)
{
	struct s_browser * b = (struct s_browser*)data;
	LOG((""));
}

static void __CDECL browser_evnt_destroy( COMPONENT * c, long buff[8], void * data)
{
	struct s_browser * b = (struct s_browser*)data;
	struct gui_window * gw = b->bw->window;
	LOG(("%s: %s (%s)\n", __FUNCTION__ ,gw->browser->bw->name, ( gw->browser->type == BT_FRAME) ? "FRAME" : "NOFRAME"));
	
	assert( b != NULL );
	assert( gw != NULL );
	/* TODO: inspect why this assert fails with frames / iframes
	/* this should have been happened alrdy */
	/* assert( b->comp == NULL ); */

	free( b );
	gw->browser = NULL;
}


static void __CDECL browser_evnt_arrowed( WINDOW *win, short buff[8], void * data) 
{
	bool abs = false;
	int value = BROWSER_SCROLL_SVAL;
	struct gui_window * gw = data;
	LGRECT cwork;
	browser_get_rect( gw, BR_CONTENT, &cwork );

	switch( buff[4] ) {
		case WA_UPPAGE:
		case WA_DNPAGE:
				value = cwork.g_h;
			break;

		case WA_LFPAGE:
		case WA_RTPAGE:
				value = cwork.g_w;
			break;
		
		default: 
			break;
	}
	browser_scroll( gw, buff[4], value, abs );
}

void __CDECL browser_evnt_slider( WINDOW *win, short buff[8], void * data)
{
	int dx = buff[4];
	int dy = buff[5];
	struct gui_window * gw = data;
	GRECT work, screen;

	if (!dx && !dy) return;

	/* update the sliders _before_ we call redraw (which might depend on the slider possitions) */
	mt_WindSlider( &app, win, (dx?HSLIDER:0) | (dy?VSLIDER:0) );

	if( dy > 0 )
		browser_scroll( gw, WA_DNPAGE, abs(dy), false );
	else if ( dy < 0)
		browser_scroll( gw, WA_UPPAGE, abs(dy), false );
	if( dx > 0 )
		browser_scroll( gw, WA_RTPAGE, abs(dx), false );
	else if( dx < 0 )
		browser_scroll( gw, WA_LFPAGE, abs(dx), false );
}

static void __CDECL browser_evnt_mbutton( WINDOW * c, short buff[8], void * data)
{
	long lbuff[8];
	short mx,my;
	browser_mouse_state bms;
	LGRECT cwork;
	struct gui_window * gw = data;
	input_window = gw;
	window_set_focus( gw, BROWSER, (void*)gw->browser );
	browser_get_rect( gw, BR_CONTENT, &cwork );
	SBUF8_TO_LBUF8(buff, lbuff)
	bms = global_track_evnt_mbutton( gw->root->handle, lbuff, data );
	mx = evnt.mx - cwork.g_x + gw->browser->scroll.current.x;
	my = evnt.my - cwork.g_y + gw->browser->scroll.current.y;
	LOG(("mevent within %s at %d / %d", gw->browser->bw->name, mx, my ));
	if( bms & BROWSER_MOUSE_DRAG_1) {
		browser_window_mouse_track(gw->browser->bw, BROWSER_MOUSE_DRAG_1, mx, my );
		bmstate |= BROWSER_MOUSE_HOLDING_1 | BROWSER_MOUSE_DRAG_ON;
		LOG(("drag within %s at %d / %d", gw->browser->bw->name, mx, my ));
	}
	if( bms & BROWSER_MOUSE_DRAG_2) {
		browser_window_mouse_track(gw->browser->bw, BROWSER_MOUSE_DRAG_2, mx, my );
		bmstate |= BROWSER_MOUSE_HOLDING_2 | BROWSER_MOUSE_DRAG_ON;
		LOG(("drag within %s at %d / %d", gw->browser->bw->name, mx, my ));
	}
	if( bms & BROWSER_MOUSE_CLICK_1) {
		window_set_focus( gw, BROWSER, (void*)gw->browser );
		browser_window_mouse_click(gw->browser->bw,BROWSER_MOUSE_PRESS_1,mx,my);
		browser_window_mouse_click(gw->browser->bw,BROWSER_MOUSE_CLICK_1,mx,my);
		LOG(("Click within %s at %d / %d", gw->browser->bw->name, mx, my ));
	}
	if( bms & BROWSER_MOUSE_CLICK_2) {
		window_set_focus( gw, BROWSER, (void*)gw->browser );
		browser_window_mouse_click(gw->browser->bw,BROWSER_MOUSE_PRESS_2,mx,my);
		browser_window_mouse_click(gw->browser->bw,BROWSER_MOUSE_CLICK_2,mx,my);
		LOG(("Click within %s at %d / %d", gw->browser->bw->name, mx, my ));
	}
}

void browser_scroll( struct gui_window * gw, short mode, int value, bool abs )
{
	LGRECT work;
	int max_y_scroll;
	int max_x_scroll;
	int oldx = gw->browser->scroll.current.x;
	int oldy = gw->browser->scroll.current.y;
	struct s_browser * b = gw->browser;
	LOG((""));
	if( gw->browser->bw->current_content == NULL ) {
		assert( 1 == 0);
		return;
	}

	browser_get_rect( gw, BR_CONTENT, &work);
	max_y_scroll = (content_get_height( b->bw->current_content ) - work.g_h );
	max_x_scroll = (content_get_width( b->bw->current_content ) - work.g_w);

	switch( mode ) {
		case WA_UPPAGE:
		case WA_UPLINE: 
			if( abs == false )
				b->scroll.requested.y -= value;
			else 
				b->scroll.requested.y = value - b->scroll.current.y;
		break;

		case WA_DNPAGE:
		case WA_DNLINE:
			if( abs == false )
				b->scroll.requested.y += value;
			else
				b->scroll.requested.y = value - b->scroll.current.y;
		break;

		case WA_LFPAGE:
		case WA_LFLINE: 
			if( abs == false )
				b->scroll.requested.x -= value;
			else
				b->scroll.requested.x = value - b->scroll.current.x;
		break;

		case WA_RTPAGE:
		case WA_RTLINE:
			if( abs == false )
				b->scroll.requested.x += value;
			else
				b->scroll.requested.x = value - b->scroll.current.x;
		break;

		default: break;			
	}

	if( b->scroll.current.y + b->scroll.requested.y < 0 ) {
			b->scroll.requested.y = -b->scroll.current.y;
	}

	if( b->scroll.current.y + b->scroll.requested.y > max_y_scroll  ) {
			b->scroll.requested.y = max_y_scroll - b->scroll.current.y;
	}

	if( b->scroll.current.x + b->scroll.requested.x < 0 ) {
			b->scroll.requested.x = -b->scroll.current.x;
	}

	if( b->scroll.current.x + b->scroll.requested.x > max_x_scroll ) {
			b->scroll.requested.x = max_x_scroll - b->scroll.current.x;
	}

	if( oldy != b->scroll.current.y + b->scroll.requested.y ||
		oldx != b->scroll.current.x + b->scroll.requested.x ) {
		b->scroll.required = true;
	}
}

/*
	perform the requested scrolling.
	gw -> the browser window to act upon.
	bwrect -> the dimensions of the browser, so that this function
			  doesn't need to get it. 
*/
static void browser_process_scroll( struct gui_window * gw, LGRECT bwrect )
{
	struct s_browser * b = gw->browser;
	GRECT src;
	GRECT dst;
	short h,w;
	
	h = (short) abs( b->scroll.requested.y );
	w = (short) abs( b->scroll.requested.x ); 

	/* if the request exceeds the browser size, redraw the whole area */
	if ( b->scroll.requested.y > bwrect.g_h || b->scroll.requested.y < -bwrect.g_h ||
	    b->scroll.requested.x > bwrect.g_w || b->scroll.requested.x < -bwrect.g_w ) {
		b->scroll.current.y += b->scroll.requested.y;
		b->scroll.current.x += b->scroll.requested.x;
		browser_schedule_redraw( gw, 0, 0, bwrect.g_w, bwrect.g_h);
		/* don't scroll again: */
		b->scroll.requested.y = 0;
		b->scroll.requested.x = 0;
	}
	if( b->scroll.requested.y < 0 ) {
		/* scroll up */
		src.g_x = 0;
		src.g_y = 0;
		src.g_w = bwrect.g_w;
		src.g_h = bwrect.g_h - h;
		dst.g_x = 0;
		dst.g_y = h;	
		dst.g_w = src.g_w;
		dst.g_h = src.g_h;
		plotter->copy_rect( plotter, src, dst );
		b->scroll.current.y += b->scroll.requested.y;
		browser_schedule_redraw( gw, 0, 0, bwrect.g_w, h ) ; 
	}

	if( b->scroll.requested.y > 0 ) {
		/* scroll down */ 
		src.g_x = 0;
		src.g_y = h;
		src.g_w = bwrect.g_w;
		src.g_h = bwrect.g_h - h;
		dst.g_x = 0;
		dst.g_y = 0;
		dst.g_w = bwrect.g_w;
		dst.g_h = bwrect.g_h - h;
		plotter->copy_rect( plotter, src, dst );
		b->scroll.current.y += b->scroll.requested.y;
		browser_schedule_redraw( gw, 0, bwrect.g_h - h, bwrect.g_w, bwrect.g_h );
	} 

	if( b->scroll.requested.x < 0 ) {
		/* scroll to the left */
		src.g_x = 0;
		src.g_y = 0;
		src.g_w = bwrect.g_w - w;
		src.g_h = bwrect.g_h;
		dst.g_x = w;
		dst.g_y = 0;
		dst.g_w = bwrect.g_w - w;
		dst.g_h = bwrect.g_h;
		plotter->copy_rect( plotter, src, dst );
		b->scroll.current.x += b->scroll.requested.x;
		browser_schedule_redraw( gw, 0, 0, w, bwrect.g_h );
	}

	if( b->scroll.requested.x > 0 ) {
		/* scroll to the right */
		src.g_x = w;
		src.g_y = 0;
		src.g_w = bwrect.g_w - w;
		src.g_h = bwrect.g_h;
		dst.g_x = 0;
		dst.g_y = 0;
		dst.g_w = bwrect.g_w - w;
		dst.g_h = bwrect.g_h;
		plotter->copy_rect( plotter, src, dst );
		b->scroll.current.x += b->scroll.requested.x;
		browser_schedule_redraw( gw, bwrect.g_w - w, 0, bwrect.g_w, bwrect.g_h );
	} 
	b->scroll.requested.y = 0;
	b->scroll.requested.x = 0;
	gw->browser->compwin->xpos = b->scroll.current.x;
	gw->browser->compwin->ypos = b->scroll.current.y;

	mt_WindSlider( &app, gw->browser->compwin, HSLIDER|VSLIDER);
}


bool browser_input( struct gui_window * gw, unsigned short nkc ) 
{
	LGRECT work;
	bool r = false;
	unsigned char ascii = (nkc & 0xFF);
	nkc = (nkc & (NKF_CTRL|NKF_SHIFT|0xFF));
	browser_get_rect(gw, BR_CONTENT, &work);

	if( (nkc & NKF_CTRL) != 0  ) {
		switch ( ascii ) {
			case 'A':
				r = browser_window_key_press(gw->browser->bw, KEY_SELECT_ALL);
			break;
	
			case 'C':
				r = browser_window_key_press(gw->browser->bw, KEY_COPY_SELECTION);
			break;

			case 'X':
				r = browser_window_key_press(gw->browser->bw, KEY_CUT_SELECTION);
			break;
	
			case 'V':
				r = browser_window_key_press(gw->browser->bw, KEY_PASTE);
			break;

			default:
			break;		
		}		
	}
	if( (nkc & NKF_SHIFT) != 0 ) {
		switch( ascii ) {

			case NK_TAB:
				r = browser_window_key_press(gw->browser->bw, KEY_SHIFT_TAB);			
			break;

			case NK_LEFT:
				if( browser_window_key_press(gw->browser->bw, KEY_LINE_START) == false) {
					browser_scroll( gw, WA_LFPAGE, work.g_w, false );
					r = true;
				}
			break;

			case NK_RIGHT:
				if( browser_window_key_press(gw->browser->bw, KEY_LINE_END) == false) {
					browser_scroll( gw, WA_RTPAGE, work.g_w, false );
					r = true;
				}
			break;

			case NK_UP:
				if ( browser_window_key_press(gw->browser->bw, KEY_PAGE_UP) ==false ){
					browser_scroll( gw, WA_UPPAGE, work.g_h, false );
					r = true;
				}
			break;

			case NK_DOWN:
				if (browser_window_key_press(gw->browser->bw, KEY_PAGE_DOWN) == false) {
					browser_scroll( gw, WA_DNPAGE, work.g_h, false );
					r = true;
				}
			break;

			default:
			break;
		}
	}
	if( (nkc & (NKF_SHIFT|NKF_CTRL) ) == 0 ) {
		switch( ascii ) {
			case NK_BS:
				r = browser_window_key_press(gw->browser->bw, KEY_DELETE_LEFT);
			break;

			case NK_DEL:
				r = browser_window_key_press(gw->browser->bw, KEY_DELETE_RIGHT);
			break;

			case NK_TAB:
				r = browser_window_key_press(gw->browser->bw, KEY_TAB);
			break;


			case NK_ENTER:
				r = browser_window_key_press(gw->browser->bw, KEY_NL);
			break;

			case NK_RET:
				r = browser_window_key_press(gw->browser->bw, KEY_CR);
			break;

			case NK_ESC:
				r = browser_window_key_press(gw->browser->bw, KEY_ESCAPE);		
			break;

			case NK_CLRHOME:
				r = browser_window_key_press(gw->browser->bw, KEY_TEXT_START);
			break;

			case NK_RIGHT:
				if (browser_window_key_press(gw->browser->bw, KEY_RIGHT) == false){
					browser_scroll( gw, WA_RTLINE, 16, false );
					r = true;
				}
			break;	

			case NK_LEFT:
				if (browser_window_key_press(gw->browser->bw, KEY_LEFT) == false) {
					browser_scroll( gw, WA_LFLINE, 16, false );
					r = true;
				}
			break;

			case NK_UP:
				if (browser_window_key_press(gw->browser->bw, KEY_UP) == false) {
					browser_scroll( gw, WA_UPLINE, 16, false);
					r = true;
				}
			break;

			case NK_DOWN:
				if (browser_window_key_press(gw->browser->bw, KEY_DOWN) == false) {
					browser_scroll( gw, WA_DNLINE, 16, false);
					r = true;
				}
			break;

			case NK_M_PGUP:
				if ( browser_window_key_press(gw->browser->bw, KEY_PAGE_UP) ==false ) {
					browser_scroll( gw, WA_UPPAGE, work.g_h, false );
					r = true;
				}
			break;

			case NK_M_PGDOWN: 
				if (browser_window_key_press(gw->browser->bw, KEY_PAGE_DOWN) == false) {
					browser_scroll( gw, WA_DNPAGE, work.g_h, false );
					r = true;
				}
			break;

			default:
			break;
		}
	}

	if( r == false && ( (nkc & NKF_CTRL)==0)  ) {
		if (ascii >= 9 ) {
			int ucs4 = atari_to_ucs4(ascii);
            r = browser_window_key_press(gw->browser->bw, ucs4 );
		}
	}
	return( r );


/*
	switch ( nkc ) {
		case NKF_LSH|NK_UP:
		case NKF_RSH|NK_UP:
		case NK_M_PGUP:
			if ( browser_window_key_press(gw->browser->bw, KEY_PAGE_UP) ==false )
				browser_scroll( gw, WA_UPPAGE, work.g_h, false );
		break;

		case NKF_RSH|NK_DOWN:
		case NKF_LSH|NK_DOWN:
		case NK_M_PGDOWN:
			if (browser_window_key_press(gw->browser->bw, KEY_PAGE_DOWN) == false)
				browser_scroll( gw, WA_DNPAGE, work.g_h, false );
		break;



		default:
			if (ascii != 0) {
				int ucs4 = atari_to_ucs4(ascii);
            	r = browser_window_key_press(gw->browser->bw, ucs4 );
			}
		break;
	}
	
	return( r );
*/		
}

static void __CDECL browser_evnt_redraw_x( WINDOW * c, short buf[8], void * data)
{	
	/* just an stub to prevent wndclear */ 
	/* Probably the browser redraw is better placed here? dunno! */ 
	return;
}

/* determines if a browser window needs redraw */
bool browser_redraw_required( struct gui_window * gw) 
{
	bool ret = true;
	int frames = 0;
	CMP_BROWSER b = gw->browser;

	{	
		/* don't do redraws if we have subframes */
		/* iframes will be an special case and must be handled special... */
		struct gui_window * g;
		for( g=window_list; g; g=g->next ) {
			if ( g != gw && g->parent == gw ) {
				if( g->browser->type == BT_FRAME ) {
					frames++;
				}
			}
		}
	}
	ret = ( (b->redraw.required && frames == 0) || b->scroll.required || b->caret.redraw );
	return( ret );
}


/* schedule a redraw of content */
/* coords are relative to the framebuffer */
void browser_schedule_redraw(struct gui_window * gw, short x0, short y0, short x1, short y1)
{
	CMP_BROWSER b = gw->browser;
	/* TODO: add rectangle to list, instead of summarizing the rect.? */
	/* otherwise it can result in large areas, altough it isnt needed. ( like 1 px in the upper left, 
	   and 1px in bottom right corner ) 
	*/
	b->redraw.required = true;
	b->redraw.area.x0 = MIN(b->redraw.area.x0, x0);
	b->redraw.area.y0 = MIN(b->redraw.area.y0, y0);
	b->redraw.area.x1 = MAX(b->redraw.area.x1, x1);
	b->redraw.area.y1 = MAX(b->redraw.area.y1, y1);
}

static void browser_redraw_content( struct gui_window * gw, int xoff, int yoff )
{
	LGRECT work;
	CMP_BROWSER b = gw->browser;
	GRECT area;

	current_redraw_browser = b->bw;
	LOG(("%s clip: %d,%d - %d,%d\n", b->bw->name, b->redraw.area.x0, 
		b->redraw.area.y0, b->redraw.area.x1, b->redraw.area.y1
	));
	area.g_x = b->redraw.area.x0;
	area.g_y = b->redraw.area.y0;
	area.g_w = b->redraw.area.x1 - b->redraw.area.x0;
	area.g_h = b->redraw.area.y1 - b->redraw.area.y0;
	assert( area.g_w > 0 && area.g_h > 0 );

	content_redraw( b->bw->current_content,
		       xoff-b->scroll.current.x, yoff-b->scroll.current.y,
		       area.g_w, area.g_h,
		       b->redraw.area.x0, b->redraw.area.y0,
		       b->redraw.area.x1, b->redraw.area.y1,
		       b->bw->scale, 0xFFFFFF);
	current_redraw_browser = NULL;
	/* reset redraw area */
	b->redraw.area.x0 = INT_MAX;
	b->redraw.area.y0 = INT_MAX;
	b->redraw.area.x1 = INT_MIN;
	b->redraw.area.y1 = INT_MIN;
}


void browser_redraw_caret( struct gui_window * gw, GRECT * area )
{
	GRECT caret;
	struct s_browser * b = gw->browser;
	if( b->caret.redraw == true ){
		caret = b->caret.requested;
		caret.g_x -= gw->browser->scroll.current.x;
		caret.g_y -= gw->browser->scroll.current.y;
		struct s_clipping oldclip;
		plot_get_clip( &oldclip );
		/* clip to cursor: */
		plot_clip( caret.g_x-1, caret.g_y -1, 
			caret.g_x + caret.g_w + 1, caret.g_y + caret.g_h + 1
		);
		plot_rectangle( caret.g_x, caret.g_y, 
			caret.g_x+caret.g_w, caret.g_y+caret.g_h,
			plot_style_caret );
		/* restore clip area: */
		plot_clip( oldclip.x0, oldclip.y0, oldclip.x1,oldclip.y1);
		b->caret.current = caret;
	}
}

void browser_redraw( struct gui_window * gw ) 
{	
	LGRECT bwrect;
	struct s_browser * b = gw->browser;
	short todo[4];

	if( b->attached == false ) {
		return;
	}

	browser_get_rect(gw, BR_CONTENT, &bwrect);

	plotter->resize(plotter, bwrect.g_w, bwrect.g_h);
	plotter->move(plotter, bwrect.g_x, bwrect.g_y );
	plotter->clip( plotter, 0, 0, bwrect.g_w, bwrect.g_h );
	plotter->lock(plotter);

	if( b->scroll.required == true && b->bw->current_content != NULL) {
		browser_process_scroll( gw, bwrect );
		b->scroll.required = false;
	}

	if (b->redraw.required == true && b->bw->current_content != NULL ) {
		if( (plotter->flags & PLOT_FLAG_OFFSCREEN) == 0 ) {
			GRECT area;
			BBOX cliporg;
			todo[0] = bwrect.g_x;
			todo[1] = bwrect.g_y;
			todo[2] = todo[0] + bwrect.g_w-1;
			todo[3] = todo[1] + bwrect.g_h-1;
			vs_clip(plotter->vdi_handle, 1, (short*)&todo[0]);

			area.g_x = b->redraw.area.x0; 
			area.g_y = b->redraw.area.y0; 
			area.g_w = b->redraw.area.x1 - b->redraw.area.x0;
			area.g_h = b->redraw.area.y1 - b->redraw.area.y0; 
			if( wind_get(gw->root->handle->handle, WF_FIRSTXYWH, 
							&todo[0], &todo[1], &todo[2], &todo[3] )!=0 ) {
				while (todo[2] && todo[3]) {
					/* convert screen to framebuffer coords: */
					todo[0] -= bwrect.g_x;
					todo[1] -= bwrect.g_y;
					if( todo[0] < 0 ){
						todo[2] = todo[2] + todo[0];
						todo[0] = 0;
					}
					if( todo[1] < 0 ){
						todo[3] = todo[3] + todo[1];
						todo[1] = 0;
					}
					if (rc_intersect((GRECT *)&area,(GRECT *)todo)) {
						b->redraw.area.x0 = todo[0];
						b->redraw.area.y0 = todo[1];
						b->redraw.area.x1 = b->redraw.area.x0 + todo[2];
						b->redraw.area.y1 = b->redraw.area.y0 + todo[3];
						browser_redraw_content( gw, 0, 0 );
					}
					if (wind_get(gw->root->handle->handle, WF_NEXTXYWH, 
							&todo[0], &todo[1], &todo[2], &todo[3])==0) {
						break;
					}
				}
			}
			vs_clip(plotter->vdi_handle, 0, (short*)&todo);
		} else {
			/* its save to do a complete redraw :) */
		}
		b->redraw.required = false;
	}
	if( b->caret.redraw == true && 	b->bw->current_content != NULL ) {
		GRECT area;
		todo[0] = bwrect.g_x;
		todo[1] = bwrect.g_y;
		todo[2] = todo[0] + bwrect.g_w;
		todo[3] = todo[1] + bwrect.g_h;
		area.g_x = bwrect.g_x;
		area.g_y = bwrect.g_y;
		area.g_w = bwrect.g_w;
		area.g_h = bwrect.g_h;
		vs_clip(plotter->vdi_handle, 1, (short*)&todo[0]);
		browser_redraw_caret( gw, &area );
		vs_clip(plotter->vdi_handle, 0, (short*)&todo[0]);
		b->caret.redraw = false;
	}
	plotter->unlock(plotter);
	/* TODO: if we use offscreen bitmap, trigger content redraw here */
}

static void __CDECL browser_evnt_redraw( COMPONENT * c, long buff[8], void * data)
{	
	short pxy[8];
	WINDOW * w;
	struct gui_window * gw = (struct gui_window *) data;
	CMP_BROWSER b = gw->browser;
	struct gui_window * rgw = browser_find_root( gw );
	LGRECT work, lclip, rwork;
	int xoff,yoff,width,heigth;
	short cw, ch, cellw, cellh;
	w = (WINDOW*)mt_CompGetPtr( &app, c, CF_WINDOW );
	browser_get_rect( gw, BR_CONTENT, &work );
	browser_get_rect( rgw, BR_CONTENT, &rwork );
	lclip = work;
	if ( !rc_lintersect( (LGRECT*)&buff[4], &lclip ) ) return;
	 
	if( b->bw->current_content == NULL )
		return;

	/* convert redraw coords to framebuffer coords: */
	lclip.g_x -= work.g_x;
	lclip.g_y -= work.g_y;
	if( lclip.g_x < 0 ) {
		lclip.g_w = work.g_w + lclip.g_x;
		lclip.g_x = 0;
	}
	if( lclip.g_y < 0 ) {
		lclip.g_h = work.g_h + lclip.g_y;
		lclip.g_y = 0;
	}
	if( lclip.g_h > 0 && lclip.g_w > 0 ) { 
		browser_schedule_redraw( gw, lclip.g_x, lclip.g_y, 
			lclip.g_x + lclip.g_w, lclip.g_y + lclip.g_h 
		);	
	}

	return;
}