netsurf/atari/settings.c

/*
 * Copyright 2012 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 <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <fcntl.h>
#include <time.h>
#include <limits.h>
#include <unistd.h>
#include <string.h>
#include <stdbool.h>
#include <windom.h>

#include "desktop/options.h"
#include "desktop/plot_style.h"
#include "atari/res/netsurf.rsh"
#include "atari/settings.h"
#include "atari/global_evnt.h"
#include "atari/misc.h"
#include "atari/plot/plot.h"
#include "atari/bitmap.h"
#include "atari/findfile.h"

extern char options[PATH_MAX];

static OBJECT * dlgtree;
static WINDOW * dlgwin;

static float tmp_option_memory_cache_size;
static float tmp_option_minimum_gif_delay;
static unsigned int tmp_option_expire_url;
static unsigned int tmp_option_font_min_size;
static unsigned int tmp_option_font_size;
static unsigned int tmp_option_min_reflow_period;
static unsigned int tmp_option_max_fetchers;
static unsigned int tmp_option_max_fetchers_per_host;
static unsigned int tmp_option_max_cached_fetch_handles;
static colour tmp_option_atari_toolbar_bg;

/* Tab forms and their buttons: */
static int frms[] = {
	CHOICES_TAB_BROWSER,
	CHOICES_TAB_RENDER,
	CHOICES_TAB_STYLE,
	CHOICES_TAB_NETWORK,
	CHOICES_TAB_PATH,
	CHOICES_TAB_CACHE
};

static int buts[] = {
	CHOICES_REG_BROWSER,
	CHOICES_REG_RENDER,
	CHOICES_REG_STYLE,
	CHOICES_REG_NETWORK,
	CHOICES_REG_PATH,
	CHOICES_REG_CACHE
};

#define OBJ_SELECTED(idx) ((dlgtree[idx].ob_state & SELECTED)!=0)
#define OBJ_CHECK(idx) SET_BIT(dlgtree[idx].ob_state, SELECTED, 1);
#define OBJ_UNCHECK(idx) SET_BIT(dlgtree[idx].ob_state, SELECTED, 0);

#define DISABLE_OBJ(idx) SET_BIT(dlgtree[idx].ob_state, DISABLED, 1); \
						 ObjcDraw( OC_FORM, dlgwin, idx, 1 )

#define ENABLE_OBJ(idx) SET_BIT(dlgtree[idx].ob_state, DISABLED, 0); \
						ObjcDraw( OC_FORM, dlgwin, idx, 1 )

#define FORMEVENT(idx) form_event( NULL, idx, 0, NULL );

#define INPUT_HOMEPAGE_URL_MAX_LEN 44
#define INPUT_LOCALE_MAX_LEN 6
#define INPUT_PROXY_HOST_MAX_LEN 31
#define INPUT_PROXY_USERNAME_MAX_LEN 36
#define INPUT_PROXY_PASSWORD_MAX_LEN 36
#define INPUT_PROXY_PORT_MAX_LEN 5
#define INPUT_MIN_REFLOW_PERIOD_MAX_LEN 4
#define LABEL_FONT_RENDERER_MAX_LEN 8
#define LABEL_PATH_MAX_LEN 43
#define LABEL_ICONSET_MAX_LEN 8
#define INPUT_TOOLBAR_COLOR_MAX_LEN 6

static void toggle_objects( void );
static void display_settings( void );
static void apply_settings( void );
static void __CDECL onclose( WINDOW *win, short buff[8] );
static void __CDECL
	closeform( WINDOW *win, int index, int unused, void *unused2);
static void __CDECL
	saveform( WINDOW *win, int index, int unused, void *unused2);
static void __CDECL
	form_event( WINDOW *win, int index, int unused, void *unused2);
static void __CDECL
	clear_history( WINDOW *win, int index, int unused, void *unused2);



WINDOW * open_settings()
{

	if( dlgtree == NULL){
		dlgtree = get_tree(CHOICES);
		if( dlgtree == NULL ){
			return( NULL );
		}
	}

	if( dlgwin == NULL){
		// TODO: localize title
		dlgwin = FormCreate(dlgtree, WAT_FORM, NULL, (char*)"Settings",
					  NULL, TRUE, FALSE);
		if( !dlgwin ){
			return( NULL );
		}
		FormThumb( dlgwin, frms, buts, sizeof(frms) / sizeof(int) );

		/* Atach events to dialog buttons: */
		ObjcAttachFormFunc( dlgwin, CHOICES_ABORT, closeform, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_OK, saveform, NULL);

		/* Connect interactive dialog elements to generic event handler: */
		ObjcAttachFormFunc( dlgwin, CHOICES_CB_USE_PROXY, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_CB_PROXY_AUTH, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_EDIT_DOWNLOAD_PATH, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_EDIT_HOTLIST_FILE, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_EDIT_CA_BUNDLE, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_EDIT_CA_CERTS_PATH, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_EDIT_EDITOR, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_INC_GIF_DELAY, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_DEC_GIF_DELAY, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_INC_INCREMENTAL_REFLOW, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_DEC_INCREMENTAL_REFLOW, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_INC_CACHED_CONNECTIONS, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_DEC_CACHED_CONNECTIONS, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_INC_MAX_FETCHERS_PER_HOST, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_DEC_MAX_FETCHERS_PER_HOST, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_DEC_MAX_FETCHERS, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_INC_MAX_FETCHERS, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_INC_DEF_FONT_SIZE, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_DEC_DEF_FONT_SIZE, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_INC_MIN_FONT_SIZE, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_DEC_MIN_FONT_SIZE, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_INC_MEM_CACHE, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_DEC_MEM_CACHE, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_INC_HISTORY_AGE, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_DEC_HISTORY_AGE, form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_BT_SEL_FONT_RENDERER,
							form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_BT_SEL_LOCALE,
							form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_INPUT_TOOLBAR_BGCOLOR,
							form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_BT_TOOLBAR_ICONSET,
							form_event, NULL);
		ObjcAttachFormFunc( dlgwin, CHOICES_BT_CLEAR_HISTORY,
							clear_history, NULL);

		EvntAdd( dlgwin, WM_CLOSED, onclose, EV_TOP  );
		display_settings();
		toggle_objects();

	} else {
		WindTop( dlgwin );
		display_settings();
		toggle_objects();
	}
	return( dlgwin );
}

void close_settings(void)
{
	if( dlgwin != NULL ){
		/* Duplicated form tree must be free'd manualy? */
		WindClose(dlgwin);
		dlgwin = NULL;
	}

}

static void set_text( short idx, char * text, int len )
{
	char spare[255];

	if( len > 254 )
		len = 254;
	if( text != NULL ){
		strncpy( spare, text, 254);
		ObjcStrFmt( spare, text, len );
	} else {
		strcpy(spare, "");
	}
	ObjcStrCpy( dlgtree, idx, spare );

}


static void __CDECL onclose( WINDOW *win, short buff[8] )
{
	close_settings();
}

static void __CDECL
closeform( WINDOW *win, int index, int unused, void *unused2)
{
	ObjcChange( OC_FORM, win, index, ~SELECTED, TRUE);
	close_settings();
}

static void __CDECL
saveform( WINDOW *win, int index, int unused, void *unused2)
{
	apply_settings();
	// Save settings
	nsoption_write( (const char*)&options );
	nsoption_read( (const char*)&options );
	close_settings();
	ObjcChange( OC_FORM, win, index, NORMAL, TRUE);
	form_alert(1, "[1][Some options require an netsurf restart!][OK]");
	main_menu_update();
}

static void __CDECL clear_history( WINDOW *win, int index, int unused,
								void *unused2)
{

}


static colour color_popup(int x, int y, colour current)
{
#define GRID_ROWS 9
#define GRID_COLS 27
	colour retval = current;
	int boxwidth=6, boxheight=8;
	struct bitmap *palette_img;
	MFDB bg, screen;
	GRECT bgarea = {x, y, GRID_COLS*boxwidth+4, GRID_ROWS*boxheight+4};
	short web_std_colors[6] = {0, 51, 102, 153, 204, 255};
	int r,g,b;
	int xpos = 0, ypos = 0;
	colour palette[216+8];
	int i=0;

	plot_style_t drawcolour = {
		.stroke_type = PLOT_OP_TYPE_NONE,
		.fill_type = PLOT_OP_TYPE_SOLID,
		.fill_colour = 0
	};

	plot_style_t outline = {
		.stroke_type = PLOT_OP_TYPE_SOLID,
		.stroke_colour = 0xAAAAAA,
		.stroke_width = 2,
		.fill_type = PLOT_OP_TYPE_NONE,
		.fill_colour = 0
	};

	/* create a palette array (web colors): */
	for (r=0; r<6; r++) {
		for (g=0; g<6; g++) {
			for (b=0; b<6; b++) {
				palette[i] = ((web_std_colors[b]<<16)
				              | (web_std_colors[g]<<8)
				              	| web_std_colors[r]);
				i++;
			}
		}
	}

	/* setup the gray color values: */
	int z = 0;
	colour grays[15] = {0x111111, 0x222222, 0x333333, 0x444444,
	                    0x555555, 0x666666, 0x777777, 0x888888,
	                    0x999999, 0x999999, 0xAAAAAA, 0xBBBBBB,
	                    0xCCCCCC, 0xDDDDDD, 0xEEEEEE};
	for (z=0;i<243;i++) {
		if (z<15)
			palette[i] = grays[z];
		else
			palette[i] = 0x000000;
		z++;
	}

	plot_set_dimensions(x, y,
	                    (GRID_COLS*boxwidth)+4, (GRID_ROWS*boxheight)+4);
	plot_lock();

	// store background:
	short pxy[8];
	init_mfdb(app.nplanes, bgarea.g_w, bgarea.g_h, 0, &bg);
	init_mfdb(0, bgarea.g_w, bgarea.g_h, 0, &screen);

	pxy[0] = bgarea.g_x;
	pxy[1] = bgarea.g_y;
	pxy[2] = bgarea.g_x + bgarea.g_w - 1;
	pxy[3] = bgarea.g_y + bgarea.g_h - 1;
	pxy[4] = 0;
	pxy[5] = 0;
	pxy[6] = bgarea.g_w - 1;
	pxy[7] = bgarea.g_h - 1;

	/* copy screen image */
	vro_cpyfm (app.graf.handle, S_ONLY, pxy, &screen, &bg);

	plot_line(x, y, x+(GRID_COLS*boxwidth)+2, y,
	          &outline);

	plot_line(x, y+(GRID_ROWS*boxheight)+2, x+(GRID_COLS*boxwidth)+2,
	          y+(GRID_ROWS*boxheight)+2,
	          &outline);

	/* draw a 27*8 grid: */
	for (i=0; i<243; i++){
		drawcolour.fill_colour = palette[i];
		plot_rectangle(xpos+2, ypos+2, xpos+boxwidth+2, ypos+boxheight+2,
		               &drawcolour);
		xpos += boxwidth;
		if (xpos >= GRID_COLS*boxwidth) {
			xpos = 0;
			ypos += boxheight;
		}
	}

	// enable mouse cursor (screen keeps beeing locked):
	graf_mouse(M_ON, NULL);

	/* fetch mouse event: */
	mt_EvntDisable(&app, dlgwin, WM_XBUTTON);
	EvntWindom(MU_BUTTON);
	mt_EvntEnable(&app, dlgwin, WM_XBUTTON);

	/* calulate clicked grid coords: */
	int row = ((evnt.my-y)/boxheight);
	int col = ((evnt.mx-x)/boxwidth);

	if (row >= 0 && row <= GRID_ROWS-1 && col >= 0 && col <= GRID_COLS-1) {
		assert( (GRID_COLS*row)+(col) >= 0 );
		assert( (GRID_COLS*row)+(col) < 243 );
		retval = palette[(GRID_COLS*row)+(col)];
	}

	/* restore background: */
	w_put_bkgr(&app, bgarea.g_x, bgarea.g_y, bgarea.g_w, bgarea.g_h, &bg);
	free(bg.fd_addr);

	plot_unlock();

#undef GRID_COLS
#undef GRID_ROWS

	return(retval);
}

/**
* Displays a popup to select available icon sets,
	the returned string is no longer than 8 characters.
* \param x x pos of popup
* \param y y pos of popup
* \return the selected string or NULL on failure.
*/
static char * toolbar_iconset_popup( int x, int y )
{
	#define MAX_SETS 24
	DIR *dp;
	struct dirent *ep;
	struct stat statbuf;
	char * current = NULL;
	char *avail[MAX_SETS];
	int selected = 0, navail = 0, i, choice=-1;
	static char toolbar_folder[PATH_MAX];
	char fullpath[PATH_MAX];

	strncpy( fullpath, nsoption_charp(tree_icons_path), 255 );
	path_add_part( fullpath, 255, "toolbar/" );

	/* Get current set (for pre-selection): */
	memset( avail, 0, MAX_SETS );
	current = nsoption_charp(atari_image_toolbar_folder);

	/* locate the toolbar folder: */
	atari_find_resource( toolbar_folder, fullpath, fullpath );

	/* search for iconset folders: */
	dp = opendir (toolbar_folder);
	if (dp != NULL){
		while (ep = readdir (dp)) {
			if (strlen(ep->d_name) < 3)
				continue;
			snprintf(fullpath, PATH_MAX-1, "%s/%s", toolbar_folder, ep->d_name );
			if (is_dir(fullpath)) {
				if (strcmp(ep->d_name, current) == 0)
					selected = navail;
					/* store the folder name: */
					avail[navail] = malloc( strlen(ep->d_name)+1 );
					sprintf( avail[navail], "%s", ep->d_name );
					navail++;
					if( navail >= MAX_SETS )
						break;
			}
		}
		(void) closedir (dp);
	}


	if (navail > 0){
		choice = MenuPopUp( avail, x, y, navail,
						-1, selected, P_LIST | P_CHCK );
		if (choice > 0)
			snprintf( toolbar_folder, 9, "%s", avail[choice-1] );
	}

	for (i=0;i<navail; i++ ) {
		free( avail[i] );
	}
	if (choice > 0)
		return( toolbar_folder );
	else
		return( NULL );
	#undef MAX_SETS
}

static void __CDECL
form_event( WINDOW *win, int index, int external, void *unused2)
{
	char spare[255];
	bool is_button = false;
	bool checked = OBJ_SELECTED( index );
	char * tmp;

	/* For font driver popup: */
	const char *font_driver_items[] = {"freetype", "internal" };
	int num_font_drivers = (sizeof(font_driver_items)/sizeof(char*));

	/*
		Just a small collection of locales, each country has at least one
		ATARI-clone user! :)
	*/
	const char *locales[] = {
		"cs", "de", "de-de" , "en", "en-gb", "en-us", "es",
		"fr", "it", "nl", "no", "pl", "ru", "sk", "sv"
	};
	int num_locales = (sizeof(locales)/sizeof(char*));
	short x, y;
	int choice;

	switch( index ){

		case CHOICES_CB_USE_PROXY:
			if( checked ){
				ENABLE_OBJ( CHOICES_EDIT_PROXY_HOST );
				ENABLE_OBJ( CHOICES_CB_PROXY_AUTH );
			}
			else {
				DISABLE_OBJ( CHOICES_EDIT_PROXY_HOST );
				DISABLE_OBJ( CHOICES_CB_PROXY_AUTH );
			}
			FORMEVENT( CHOICES_CB_PROXY_AUTH );
			ObjcDrawParent(OC_FORM, dlgwin, index, 9, 1 );
			break;

		case CHOICES_CB_PROXY_AUTH:
			if( checked && OBJ_SELECTED( CHOICES_CB_USE_PROXY ) ){
				ENABLE_OBJ(CHOICES_EDIT_PROXY_USERNAME);
				ENABLE_OBJ(CHOICES_EDIT_PROXY_PASSWORD);
			}
			else {
				DISABLE_OBJ(CHOICES_EDIT_PROXY_USERNAME);
				DISABLE_OBJ(CHOICES_EDIT_PROXY_PASSWORD);
			}
			break;

		case CHOICES_CB_ENABLE_ANIMATION:
			if( checked ){
				ENABLE_OBJ( CHOICES_EDIT_MIN_GIF_DELAY );
			}
			else {
				DISABLE_OBJ( CHOICES_EDIT_MIN_GIF_DELAY );
			}
			break;

		case CHOICES_BT_SEL_FONT_RENDERER:
			if( external ){
				objc_offset( FORM(win), CHOICES_BT_SEL_FONT_RENDERER, &x, &y);
				choice = MenuPopUp ( font_driver_items, x, y,
									num_font_drivers,
									 -1, -1, P_LIST + P_WNDW + P_CHCK );
				if( choice > 0 &&
					choice <= num_font_drivers ){
					ObjcStrCpy( dlgtree, CHOICES_BT_SEL_FONT_RENDERER,
								(char*)font_driver_items[choice-1] );
				}
				ObjcChange( OC_FORM, win, index, NORMAL, TRUE);
			}
			tmp = ObjcString( dlgtree, CHOICES_BT_SEL_FONT_RENDERER, NULL);
			if( strcmp(tmp, "freetype") == 0 ){
				ENABLE_OBJ( CHOICES_CB_ANTI_ALIASING );
			} else {
				DISABLE_OBJ( CHOICES_CB_ANTI_ALIASING );
			}
			break;

		case CHOICES_BT_SEL_LOCALE:
			objc_offset( FORM(win), CHOICES_BT_SEL_LOCALE, &x, &y);
			choice = MenuPopUp ( locales, x, y,
								num_locales,
								 -1, -1, P_LIST + P_WNDW + P_CHCK );
			if( choice > 0 && choice <= num_locales ){
				ObjcStrCpy( dlgtree, CHOICES_BT_SEL_LOCALE,
							(char*)locales[choice-1] );
			}
			ObjcChange( OC_FORM, win, index, NORMAL, TRUE);
			break;

		case CHOICES_INPUT_TOOLBAR_BGCOLOR:
			objc_offset( FORM(win), CHOICES_INPUT_TOOLBAR_BGCOLOR, &x, &y );
			choice = color_popup(x, y, tmp_option_atari_toolbar_bg);
			snprintf( spare, 255, "%06x", choice );
			tmp_option_atari_toolbar_bg = choice;
			ObjcStrCpy( dlgtree, CHOICES_INPUT_TOOLBAR_BGCOLOR,
							spare );
			is_button = true;
			ObjcChange( OC_FORM, win, index, NORMAL, TRUE);
			ObjcDrawParent(OC_FORM, dlgwin, CHOICES_INPUT_TOOLBAR_BGCOLOR, 2, 1 );
			break;

		case CHOICES_BT_TOOLBAR_ICONSET:
			objc_offset( FORM(win), CHOICES_BT_TOOLBAR_ICONSET, &x, &y );
			tmp = toolbar_iconset_popup(x,y);
			if( tmp != NULL ){
				ObjcStrCpy( dlgtree, CHOICES_BT_TOOLBAR_ICONSET, tmp );
			}
			is_button = true;
			ObjcChange( OC_FORM, win, index, NORMAL, TRUE);
			break;

		case CHOICES_INC_MEM_CACHE:
		case CHOICES_DEC_MEM_CACHE:
			if( index == CHOICES_DEC_MEM_CACHE )
				tmp_option_memory_cache_size -= 0.1;
			else
				tmp_option_memory_cache_size += 0.1;

			if( tmp_option_memory_cache_size < 0.5 )
				tmp_option_memory_cache_size = 0.5;
			if( tmp_option_memory_cache_size > 999.9 )
				tmp_option_memory_cache_size = 999.9;
			snprintf( spare, 255, "%03.1f", tmp_option_memory_cache_size );
			set_text( CHOICES_STR_MAX_MEM_CACHE, spare, 5 );
			is_button = true;
			ObjcDrawParent(OC_FORM, dlgwin, CHOICES_STR_MAX_MEM_CACHE, 2, 1 );
			break;

		case CHOICES_INC_CACHED_CONNECTIONS:
		case CHOICES_DEC_CACHED_CONNECTIONS:
			if( index == CHOICES_INC_CACHED_CONNECTIONS )
				tmp_option_max_cached_fetch_handles += 1;
			else
				tmp_option_max_cached_fetch_handles -= 1;
			if( tmp_option_max_cached_fetch_handles > 31 )
				tmp_option_max_cached_fetch_handles = 31;

			snprintf( spare, 255, "%02d", tmp_option_max_cached_fetch_handles );
			set_text( CHOICES_EDIT_MAX_CACHED_CONNECTIONS, spare, 2 );
			is_button = true;
			ObjcDrawParent(OC_FORM, dlgwin, CHOICES_EDIT_MAX_CACHED_CONNECTIONS,
							2, 1 );
			break;

		case CHOICES_INC_MAX_FETCHERS:
		case CHOICES_DEC_MAX_FETCHERS:
			if( index == CHOICES_INC_MAX_FETCHERS )
				tmp_option_max_fetchers += 1;
			else
				tmp_option_max_fetchers -= 1;
			if( tmp_option_max_fetchers > 31 )
				tmp_option_max_fetchers = 31;

			snprintf( spare, 255, "%02d", tmp_option_max_fetchers );
			set_text( CHOICES_EDIT_MAX_FETCHERS, spare, 2 );
			is_button = true;
			ObjcDrawParent(OC_FORM, dlgwin, CHOICES_EDIT_MAX_FETCHERS,
							3, 1 );
			break;

		case CHOICES_INC_MAX_FETCHERS_PER_HOST:
		case CHOICES_DEC_MAX_FETCHERS_PER_HOST:
			if( index == CHOICES_INC_MAX_FETCHERS_PER_HOST )
				tmp_option_max_fetchers_per_host += 1;
			else
				tmp_option_max_fetchers_per_host -= 1;
			if( tmp_option_max_fetchers_per_host > 31 )
				tmp_option_max_fetchers_per_host = 31;

			snprintf( spare, 255, "%02d", tmp_option_max_fetchers_per_host );
			set_text( CHOICES_EDIT_MAX_FETCHERS_PER_HOST, spare, 2 );
			is_button = true;
			ObjcDrawParent(OC_FORM, dlgwin, CHOICES_EDIT_MAX_FETCHERS_PER_HOST,
							2, 1 );
			break;

		case CHOICES_INC_HISTORY_AGE:
		case CHOICES_DEC_HISTORY_AGE:
			if( index == CHOICES_INC_HISTORY_AGE )
				tmp_option_expire_url += 1;
			else
				tmp_option_expire_url -= 1;

			if( tmp_option_expire_url > 99 )
				tmp_option_expire_url =  0;

			snprintf( spare, 255, "%02d", tmp_option_expire_url );
			set_text( CHOICES_EDIT_HISTORY_AGE, spare, 2 );
			is_button = true;
			ObjcDrawParent(OC_FORM, dlgwin, CHOICES_EDIT_HISTORY_AGE,
							3, 1 );
			break;

		case CHOICES_INC_GIF_DELAY:
		case CHOICES_DEC_GIF_DELAY:
			if( index == CHOICES_INC_GIF_DELAY )
				tmp_option_minimum_gif_delay += 0.1;
			else
				tmp_option_minimum_gif_delay -= 0.1;

			if( tmp_option_minimum_gif_delay < 0.1 )
				tmp_option_minimum_gif_delay = 0.1;
			if( tmp_option_minimum_gif_delay > 9.0 )
				tmp_option_minimum_gif_delay = 9.0;
			snprintf( spare, 255, "%01.1f", tmp_option_minimum_gif_delay );
			set_text( CHOICES_EDIT_MIN_GIF_DELAY, spare, 3 );
			is_button = true;
			ObjcDrawParent(OC_FORM, dlgwin, CHOICES_EDIT_MIN_GIF_DELAY, 3, 1 );
			break;

		case CHOICES_INC_MIN_FONT_SIZE:
		case CHOICES_DEC_MIN_FONT_SIZE:
			if( index == CHOICES_INC_MIN_FONT_SIZE )
				tmp_option_font_min_size += 1;
			else
				tmp_option_font_min_size -= 1;

			if( tmp_option_font_min_size > 500 )
				tmp_option_font_min_size = 500;
			if( tmp_option_font_min_size < 10 )
				tmp_option_font_min_size = 10;

			snprintf( spare, 255, "%03d", tmp_option_font_min_size );
			set_text( CHOICES_EDIT_MIN_FONT_SIZE, spare, 3 );
			is_button = true;
			ObjcDrawParent(OC_FORM, dlgwin, CHOICES_EDIT_MIN_FONT_SIZE,
							3, 1 );
			break;

		case CHOICES_INC_DEF_FONT_SIZE:
		case CHOICES_DEC_DEF_FONT_SIZE:
			if( index == CHOICES_INC_DEF_FONT_SIZE )
				tmp_option_font_size += 1;
			else
				tmp_option_font_size -= 1;

			if( tmp_option_font_size > 999 )
				tmp_option_font_size = 999;
			if( tmp_option_font_size < 50 )
				tmp_option_font_size = 50;

			snprintf( spare, 255, "%03d", tmp_option_font_size );
			set_text( CHOICES_EDIT_DEF_FONT_SIZE, spare, 3 );
			is_button = true;
			ObjcDrawParent(OC_FORM, dlgwin, CHOICES_EDIT_DEF_FONT_SIZE,
							3, 1 );

			break;

		case CHOICES_INC_INCREMENTAL_REFLOW:
		case CHOICES_DEC_INCREMENTAL_REFLOW:
			if( index == CHOICES_INC_INCREMENTAL_REFLOW )
				tmp_option_min_reflow_period += 1;
			else
				tmp_option_min_reflow_period -= 1;

			if( tmp_option_min_reflow_period > 9999 )
				tmp_option_min_reflow_period = 10;

			snprintf( spare, 255, "%04d", tmp_option_min_reflow_period );
			set_text( CHOICES_EDIT_MIN_REFLOW_PERIOD, spare, 4 );
			is_button = true;
			ObjcDrawParent(OC_FORM, dlgwin, CHOICES_EDIT_MIN_REFLOW_PERIOD,
							3, 1 );
			break;

			default: break;
	}
	if( is_button ){
		// remove selection indicator from button element:
		OBJ_UNCHECK( index );
		ObjcDraw( OC_FORM, dlgwin, index,  1 );
	}
}

/**
 * Toogle all objects which are directly influenced by other GUI elements
 * ( like checkbox )
 */
static void toggle_objects( void )
{
	/* enable / disable (refresh) objects depending on radio button values: */
	FORMEVENT(CHOICES_CB_USE_PROXY);
	FORMEVENT(CHOICES_CB_PROXY_AUTH);
	FORMEVENT(CHOICES_BT_SEL_FONT_RENDERER);
}


/* this gets called each time the settings dialog is opened: */
static void display_settings( void )
{
	char spare[255];
	// read current settings and display them

	/* "Browser" tab: */
	set_text( CHOICES_EDIT_HOMEPAGE, nsoption_charp(homepage_url),
			INPUT_HOMEPAGE_URL_MAX_LEN );

	if( nsoption_bool(block_ads) ){
		OBJ_CHECK( CHOICES_CB_HIDE_ADVERTISEMENT );
	} else {
		OBJ_UNCHECK( CHOICES_CB_HIDE_ADVERTISEMENT );
	}
	if( nsoption_bool(target_blank) ){
		OBJ_UNCHECK( CHOICES_CB_DISABLE_POPUP_WINDOWS );
	} else {
		OBJ_CHECK( CHOICES_CB_DISABLE_POPUP_WINDOWS );
	}
	if( nsoption_bool(send_referer) ){
		OBJ_CHECK( CHOICES_CB_SEND_HTTP_REFERRER );
	} else {
		OBJ_UNCHECK( CHOICES_CB_SEND_HTTP_REFERRER );
	}
	if( nsoption_bool(do_not_track) ){
		OBJ_CHECK( CHOICES_CB_SEND_DO_NOT_TRACK );
	} else {
		OBJ_UNCHECK( CHOICES_CB_SEND_DO_NOT_TRACK );
	}

	set_text( CHOICES_BT_SEL_LOCALE,
		  nsoption_charp(accept_language) ? nsoption_charp(accept_language) : (char*)"en",
			INPUT_LOCALE_MAX_LEN );

	tmp_option_expire_url = nsoption_int(expire_url);
	snprintf( spare, 255, "%02d", nsoption_int(expire_url) );
	set_text( CHOICES_EDIT_HISTORY_AGE, spare, 2 );

	/* "Cache" tab: */
	tmp_option_memory_cache_size = nsoption_int(memory_cache_size) / 100000;
	snprintf( spare, 255, "%03.1f", tmp_option_memory_cache_size );
	set_text( CHOICES_STR_MAX_MEM_CACHE, spare, 5 );

	/* "Paths" tab: */
	set_text( CHOICES_EDIT_DOWNLOAD_PATH, nsoption_charp(downloads_path),
			LABEL_PATH_MAX_LEN );
	set_text( CHOICES_EDIT_HOTLIST_FILE, nsoption_charp(hotlist_file),
			LABEL_PATH_MAX_LEN );
	set_text( CHOICES_EDIT_CA_BUNDLE, nsoption_charp(ca_bundle),
			LABEL_PATH_MAX_LEN );
	set_text( CHOICES_EDIT_CA_CERTS_PATH, nsoption_charp(ca_path),
			LABEL_PATH_MAX_LEN );
	set_text( CHOICES_EDIT_EDITOR, nsoption_charp(atari_editor),
			LABEL_PATH_MAX_LEN );

	/* "Rendering" tab: */
	set_text( CHOICES_BT_SEL_FONT_RENDERER, nsoption_charp(atari_font_driver),
			LABEL_FONT_RENDERER_MAX_LEN );
	SET_BIT(dlgtree[CHOICES_CB_TRANSPARENCY].ob_state,
			SELECTED, nsoption_int(atari_transparency) ? 1 : 0 );
	SET_BIT(dlgtree[CHOICES_CB_ENABLE_ANIMATION].ob_state,
			SELECTED, nsoption_bool(animate_images) ? 1 : 0 );
	SET_BIT(dlgtree[CHOICES_CB_INCREMENTAL_REFLOW].ob_state,
			SELECTED, nsoption_bool(incremental_reflow) ? 1 : 0 );
	SET_BIT(dlgtree[CHOICES_CB_ANTI_ALIASING].ob_state,
			SELECTED, nsoption_int(atari_font_monochrom) ? 0 : 1 );

	tmp_option_min_reflow_period = nsoption_int(min_reflow_period);
	snprintf( spare, 255, "%04d", tmp_option_min_reflow_period );
	set_text( CHOICES_EDIT_MIN_REFLOW_PERIOD, spare,
			INPUT_MIN_REFLOW_PERIOD_MAX_LEN );

	tmp_option_minimum_gif_delay = (float)nsoption_int(minimum_gif_delay) / (float)100;
	snprintf( spare, 255, "%01.1f", tmp_option_minimum_gif_delay );
	set_text( CHOICES_EDIT_MIN_GIF_DELAY, spare, 3 );

	/* "Network" tab: */
	set_text( CHOICES_EDIT_PROXY_HOST, nsoption_charp(http_proxy_host),
			INPUT_PROXY_HOST_MAX_LEN );
	snprintf( spare, 255, "%5d", nsoption_int(http_proxy_port) );
	set_text( CHOICES_EDIT_PROXY_PORT, spare,
			INPUT_PROXY_PORT_MAX_LEN );

	set_text( CHOICES_EDIT_PROXY_USERNAME, nsoption_charp(http_proxy_auth_user),
			INPUT_PROXY_USERNAME_MAX_LEN );
	set_text( CHOICES_EDIT_PROXY_PASSWORD, nsoption_charp(http_proxy_auth_pass),
			INPUT_PROXY_PASSWORD_MAX_LEN );
	SET_BIT(dlgtree[CHOICES_CB_USE_PROXY].ob_state,
			SELECTED, nsoption_bool(http_proxy) ? 1 : 0 );
	SET_BIT(dlgtree[CHOICES_CB_PROXY_AUTH].ob_state,
			SELECTED, nsoption_int(http_proxy_auth) ? 1 : 0 );
	SET_BIT(dlgtree[CHOICES_CB_FG_IMAGES].ob_state,
			SELECTED, nsoption_bool(foreground_images) ? 1 : 0 );
	SET_BIT(dlgtree[CHOICES_CB_BG_IMAGES].ob_state,
			SELECTED, nsoption_bool(background_images) ? 1 : 0 );

	tmp_option_max_cached_fetch_handles = nsoption_int(max_cached_fetch_handles);
	snprintf( spare, 255, "%2d", nsoption_int(max_cached_fetch_handles) );
	set_text( CHOICES_EDIT_MAX_CACHED_CONNECTIONS, spare , 2 );

	tmp_option_max_fetchers = nsoption_int(max_fetchers);
	snprintf( spare, 255, "%2d", nsoption_int(max_fetchers) );
	set_text( CHOICES_EDIT_MAX_FETCHERS, spare , 2 );

	tmp_option_max_fetchers_per_host = nsoption_int(max_fetchers_per_host);
	snprintf( spare, 255, "%2d", nsoption_int(max_fetchers_per_host) );
	set_text( CHOICES_EDIT_MAX_FETCHERS_PER_HOST, spare , 2 );


	/* "Style" tab: */
	tmp_option_font_min_size = nsoption_int(font_min_size);
	snprintf( spare, 255, "%3d", nsoption_int(font_min_size) );
	set_text( CHOICES_EDIT_MIN_FONT_SIZE, spare , 3 );

	tmp_option_font_size = nsoption_int(font_size);
	snprintf( spare, 255, "%3d", nsoption_int(font_size) );
	set_text( CHOICES_EDIT_DEF_FONT_SIZE, spare , 3 );

	set_text(CHOICES_BT_TOOLBAR_ICONSET,
	         nsoption_charp(atari_image_toolbar_folder), LABEL_ICONSET_MAX_LEN);

	tmp_option_atari_toolbar_bg = nsoption_int(atari_toolbar_bg);
	snprintf( spare, 255, "%06x", tmp_option_atari_toolbar_bg);
	set_text(CHOICES_INPUT_TOOLBAR_BGCOLOR, spare,
			INPUT_TOOLBAR_COLOR_MAX_LEN );

	/* Only first tab is refreshed: */
	ObjcDraw( OC_FORM, dlgwin, CHOICES_TAB_BROWSER, 4 );

	// update elements (enable/disable) chained to form events:
	toggle_objects();
}

static void apply_settings( void )
{
	/* "Network" tab: */
	nsoption_set_bool(http_proxy, OBJ_SELECTED(CHOICES_CB_USE_PROXY));
	if ( OBJ_SELECTED(CHOICES_CB_PROXY_AUTH) ) {
		nsoption_set_int(http_proxy_auth, OPTION_HTTP_PROXY_AUTH_BASIC);
	} else {
		nsoption_set_int(http_proxy_auth, OPTION_HTTP_PROXY_AUTH_NONE);
	}
	nsoption_set_charp(http_proxy_auth_pass,
		ObjcString( dlgtree, CHOICES_EDIT_PROXY_PASSWORD, NULL));
	nsoption_set_charp(http_proxy_auth_user,
		ObjcString( dlgtree, CHOICES_EDIT_PROXY_USERNAME, NULL));
	nsoption_set_charp(http_proxy_host,
		ObjcString( dlgtree, CHOICES_EDIT_PROXY_HOST, NULL));
	nsoption_set_int(http_proxy_port,
		atoi( ObjcString( dlgtree, CHOICES_EDIT_PROXY_PORT, NULL) ));
	nsoption_set_int(max_fetchers_per_host,
		atoi( ObjcString( dlgtree, CHOICES_EDIT_MAX_FETCHERS_PER_HOST, NULL)));
	nsoption_set_int(max_cached_fetch_handles,
		atoi( ObjcString( dlgtree, CHOICES_EDIT_MAX_CACHED_CONNECTIONS, NULL)));
	nsoption_set_int(max_fetchers,
		atoi( ObjcString( dlgtree, CHOICES_EDIT_MAX_FETCHERS, NULL) ));
	nsoption_set_bool(foreground_images,
			  OBJ_SELECTED( CHOICES_CB_FG_IMAGES ));
	nsoption_set_bool(background_images,
			  OBJ_SELECTED( CHOICES_CB_BG_IMAGES ));

	/* "Style" tab: */
	nsoption_set_int(font_min_size, tmp_option_font_min_size);
	nsoption_set_int(font_size, tmp_option_font_size);
	nsoption_set_colour(atari_toolbar_bg, tmp_option_atari_toolbar_bg);
	nsoption_set_charp(atari_image_toolbar_folder,
						ObjcString( dlgtree, CHOICES_BT_TOOLBAR_ICONSET, NULL)
					);

	/* "Rendering" tab: */
	nsoption_set_charp(atari_font_driver,
		ObjcString( dlgtree, CHOICES_BT_SEL_FONT_RENDERER, NULL));
	nsoption_set_bool(atari_transparency,
			  OBJ_SELECTED(CHOICES_CB_TRANSPARENCY));
	nsoption_set_bool(animate_images,
			  OBJ_SELECTED(CHOICES_CB_ENABLE_ANIMATION));
	nsoption_set_int(minimum_gif_delay,
			 (int)(tmp_option_minimum_gif_delay*100+0.5));
	nsoption_set_bool(incremental_reflow,
			  OBJ_SELECTED(CHOICES_CB_INCREMENTAL_REFLOW));
	nsoption_set_int(min_reflow_period, tmp_option_min_reflow_period);
	nsoption_set_int(atari_font_monochrom,
			 !OBJ_SELECTED( CHOICES_CB_ANTI_ALIASING ));

	/* "Paths" tabs: */
	nsoption_set_charp(ca_bundle,
		ObjcString( dlgtree, CHOICES_EDIT_CA_BUNDLE, NULL));
	nsoption_set_charp(ca_path,
		ObjcString( dlgtree, CHOICES_EDIT_CA_CERTS_PATH, NULL));
	nsoption_set_charp(homepage_url,
		ObjcString( dlgtree, CHOICES_EDIT_CA_CERTS_PATH, NULL));
	nsoption_set_charp(hotlist_file,
		ObjcString( dlgtree, CHOICES_EDIT_HOTLIST_FILE, NULL));
	nsoption_set_charp(atari_editor,
		ObjcString( dlgtree, CHOICES_EDIT_EDITOR, NULL));
	nsoption_set_charp(downloads_path,
		ObjcString( dlgtree, CHOICES_EDIT_DOWNLOAD_PATH, NULL));

	/* "Cache" tab: */
	nsoption_set_int(memory_cache_size,
			 tmp_option_memory_cache_size * 100000);

	/* "Browser" tab: */
	nsoption_set_bool(target_blank,
			  !OBJ_SELECTED(CHOICES_CB_DISABLE_POPUP_WINDOWS));
	nsoption_set_bool(block_ads,
			  OBJ_SELECTED(CHOICES_CB_HIDE_ADVERTISEMENT));
	nsoption_set_charp(accept_language,
			   ObjcString( dlgtree, CHOICES_BT_SEL_LOCALE, NULL));
	nsoption_set_int(expire_url,
		atoi(ObjcString( dlgtree, CHOICES_EDIT_HISTORY_AGE, NULL)));
	nsoption_set_bool(send_referer,
			  OBJ_SELECTED(CHOICES_CB_SEND_HTTP_REFERRER));
	nsoption_set_bool(do_not_track,
			  OBJ_SELECTED(CHOICES_CB_SEND_HTTP_REFERRER));
	nsoption_set_charp(homepage_url,
			   ObjcString( dlgtree, CHOICES_EDIT_HOMEPAGE, NULL));
}

#undef OBJ_SELECTED
#undef OBJ_CHECK
#undef OBJ_UNCHECK
#undef DISABLE_OBJ
#undef ENABLE_OBJ
#undef FORMEVENT