options.c

/* options.c

Copyright (C) 1999-2003 Tom Gilbert.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to
deal in the Software without restriction, including without limitation the
rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies of the Software and its documentation and acknowledgment shall be
given in the documentation and software packages that this Software was
used.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

*/

#include "feh.h"
#include "filelist.h"
#include "options.h"

static void check_options(void);
static void feh_parse_option_array(int argc, char **argv);
static void feh_parse_environment_options(void);
static void feh_check_theme_options(int arg, char **argv);
static void feh_parse_options_from_string(char *opts);
static void feh_load_options_for_theme(char *theme);
static char *theme;

fehoptions opt;

void init_parse_options(int argc, char **argv)
{
	D_ENTER(4);

	/* For setting the command hint on X windows */
	cmdargc = argc;
	cmdargv = argv;

	/* Set default options */
	memset(&opt, 0, sizeof(fehoptions));
	opt.display = 1;
	opt.aspect = 1;
	opt.slideshow_delay = -1.0;
	opt.thumb_w = 60;
	opt.thumb_h = 60;
	opt.menu_font = estrdup(DEFAULT_MENU_FONT);
	opt.font = estrdup(DEFAULT_FONT);
	opt.image_bg = estrdup("default");
	opt.menu_bg = estrdup(PREFIX "/share/feh/images/menubg_default.png");
	opt.menu_style = estrdup(PREFIX "/share/feh/fonts/menu.style");
	opt.menu_border = 4;

	opt.reload_button = 0;
	opt.pan_button = 1;
	opt.zoom_button = 2;
	opt.menu_button = 3;
	opt.menu_ctrl_mask = 0;
	opt.prev_button = 4;
	opt.next_button = 5;

	opt.rotate_button = 2;
	opt.no_rotate_ctrl_mask = 0;
	opt.blur_button = 1;
	opt.no_blur_ctrl_mask = 0;

	opt.no_jump_on_resort = 0;

	opt.builtin_http = 0;

	opt.xinerama = 0;
	opt.screen_clip = 1;
#ifdef HAVE_LIBXINERAMA
	/* if we're using xinerama, then enable it by default */
	opt.xinerama = 1;
#endif				/* HAVE_LIBXINERAMA */

	D(3, ("About to parse env options (if any)\n"));
	/* Check for and parse any options in FEH_OPTIONS */
	feh_parse_environment_options();

	D(3, ("About to parse commandline options\n"));
	/* Parse the cmdline args */
	feh_parse_option_array(argc, argv);

	D(3, ("About to check for theme configuration\n"));
	feh_check_theme_options(argc, argv);

	/* If we have a filelist to read, do it now */
	if (opt.filelistfile) {
		/* joining two reverse-sorted lists in this manner works nicely for us
		   here, as files specified on the commandline end up at the *end* of
		   the combined filelist, in the specified order. */
		D(3, ("About to load filelist from file\n"));
		filelist = gib_list_cat(filelist, feh_read_filelist(opt.filelistfile));
	}

	D(4, ("Options parsed\n"));

	if (opt.bgmode)
		D_RETURN_(4);

	filelist_len = gib_list_length(filelist);
	if (!filelist_len)
		show_mini_usage();

	check_options();

	feh_prepare_filelist();
	D_RETURN_(4);
}

static void feh_check_theme_options(int arg, char **argv)
{
	D_ENTER(4);
	if (!theme) {
		/* This prevents screw up when running src/feh or ./feh */
		char *pos = strrchr(argv[0], '/');

		if (pos)
			theme = estrdup(pos + 1);
		else
			theme = estrdup(argv[0]);
	}
	D(3, ("Theme name is %s\n", theme));

	feh_load_options_for_theme(theme);

	free(theme);
	D_RETURN_(4);
	arg = 0;
}

static void feh_load_options_for_theme(char *theme)
{
	FILE *fp = NULL;
	char *home;
	char *rcpath = NULL;
	char s[1024], s1[1024], s2[1024];

	D_ENTER(4);

	if (opt.rcfile) {
		if ((fp = fopen(opt.rcfile, "r")) == NULL) {
			weprintf("couldn't load the specified rcfile %s\n", opt.rcfile);
			D_RETURN_(4);
		}
	} else {
		home = getenv("HOME");
		if (!home)
			eprintf("D'oh! Please define HOME in your environment! "
					"It would really help me out...\n");
		rcpath = estrjoin("/", home, ".fehrc", NULL);
		D(3, ("Trying %s for config\n", rcpath));
		fp = fopen(rcpath, "r");

		if (!fp && ((fp = fopen("/etc/fehrc", "r")) == NULL)) {
			feh_create_default_config(rcpath);

			if ((fp = fopen(rcpath, "r")) == NULL)
				D_RETURN_(4);
		}

		free(rcpath);
	}

	/* Oooh. We have an options file :) */
	for (; fgets(s, sizeof(s), fp);) {
		s1[0] = '\0';
		s2[0] = '\0';
		sscanf(s, "%s %[^\n]\n", (char *) &s1, (char *) &s2);
		if (!(*s1) || (!*s2) || (*s1 == '\n') || (*s1 == '#'))
			continue;
		D(5, ("Got theme/options pair %s/%s\n", s1, s2));
		if (!strcmp(s1, theme)) {
			D(4, ("A match. Using options %s\n", s2));
			feh_parse_options_from_string(s2);
			break;
		}
	}
	fclose(fp);
	D_RETURN_(4);
}

static void feh_parse_environment_options(void)
{
	char *opts;

	D_ENTER(4);

	if ((opts = getenv("FEH_OPTIONS")) == NULL)
		D_RETURN_(4);