main.c

来自「Gqview,Linux下基于GTK+库写成的轻量级而能丰富的图像浏览程序。」· C语言 代码 · 共 1,367 行 · 第 1/3 页

/*
 * GQview
 * (C) 2004 John Ellis
 *
 * Author: John Ellis
 *
 * This software is released under the GNU General Public License (GNU GPL).
 * Please read the included file COPYING for more information.
 * This software comes with no warranty of any kind, use at your own risk!
 */


#include "gqview.h"

#include "cache.h"
#include "collect.h"
#include "collect-io.h"
#include "dnd.h"
#include "editors.h"
#include "filelist.h"
#include "img-view.h"
#include "layout.h"
#include "layout_image.h"
#include "menu.h"
#include "preferences.h"
#include "rcfile.h"
#include "remote.h"
#include "similar.h"
#include "slideshow.h"
#include "utilops.h"
#include "ui_bookmark.h"
#include "ui_help.h"
#include "ui_fileops.h"
#include "ui_tabcomp.h"
#include "ui_utildlg.h"

#include <gdk/gdkkeysyms.h> /* for keyboard values */

#include "icons/icon.xpm"


#include <math.h>


static RemoteConnection *gqview_remote = NULL;
static CollectionData *gqview_command_collection = NULL;


/*
 *-----------------------------------------------------------------------------
 * misc (public)
 *-----------------------------------------------------------------------------
 */ 

typedef struct _WindowIconData WindowIconData;
struct _WindowIconData
{
	const char **icon;
	gchar *path;
};

static void window_set_icon_cb(GtkWidget *widget, gpointer data)
{
	WindowIconData *wid = data;
	GdkPixbuf *pb;
	GdkPixmap *pixmap;
	GdkBitmap *mask;

	if (wid->icon)
		{
		pb = gdk_pixbuf_new_from_xpm_data(wid->icon);
		}
	else
		{
		pb = gdk_pixbuf_new_from_file(wid->path, NULL);
		}

	g_free(wid->path);
	g_free(wid);

	if (!pb) return;

	gdk_pixbuf_render_pixmap_and_mask(pb, &pixmap, &mask, 128);
	gdk_pixbuf_unref(pb);

	gdk_window_set_icon(widget->window, NULL, pixmap, mask);
	/* apparently, gdk_window_set_icon does not ref the pixmap and mask, so don't unref it (leak?) */
}

void window_set_icon(GtkWidget *window, const char **icon, const gchar *file)
{
	WindowIconData *wid;

	if (!icon && !file) icon = (const char **)icon_xpm;

	wid = g_new0(WindowIconData, 1);
	wid->icon = icon;
	wid->path = g_strdup(file);

	g_signal_connect(G_OBJECT(window), "realize",
			 G_CALLBACK(window_set_icon_cb), wid);
}

gint window_maximized(GtkWidget *window)
{
	GdkWindowState state;

	if (!window || !window->window) return FALSE;

	state = gdk_window_get_state(window->window);
	return (state & GDK_WINDOW_STATE_MAXIMIZED);
}

gdouble get_zoom_increment(void)
{
	return ((zoom_increment != 0) ? (gdouble)zoom_increment / 10.0 : 1.0);
}

/*
 *-----------------------------------------------------------------------------
 * Open  browser with the help Documentation
 *-----------------------------------------------------------------------------
 */

static gchar *command_result(const gchar *binary, const gchar *command)
{
	gchar *result = NULL;
	FILE *f;
	char buf[2048];
	int l;

	if (!binary) return NULL;
	if (!file_in_path(binary)) return NULL;

	if (!command) return g_strdup(binary);
	if (command[0] == '!') return g_strdup(command + 1);

	f = popen(command, "r");
	if (!f) return NULL;

	while ((l = fread(buf, sizeof(char), sizeof(buf), f)) > 0)
		{
		if (!result)
			{
			int n = 0;

			while (n < l && buf[n] != '\n' && buf[n] != '\r') n++;
			if (n > 0) result = g_strndup(buf, n);
			}
		}

	pclose(f);

	return result;
}

static void help_browser_command(const gchar *command, const gchar *path)
{
	gchar *result;
	gchar *buf;
	gchar *begin;
	gchar *end;

	if (!command || !path) return;

	if (debug) printf("Help command pre \"%s\", \"%s\"\n", command, path);

	buf = g_strdup(command);
	begin = strstr(buf, "%s");
	if (begin)
		{
		*begin = '\0';
		end = begin + 2;
		begin = buf;

		result = g_strdup_printf("%s%s%s &", begin, path, end);
		}
	else
		{
		result = g_strdup_printf("%s \"%s\" &", command, path);
		}
	g_free(buf);

	if (debug) printf("Help command post [%s]\n", result);

	system(result);

	g_free(result);
}

/*
 * each set of 2 strings is one browser:
 *   the 1st is the binary to look for in the path
 *   the 2nd has 3 capabilities:
 *        NULL     exec binary with html file path as command line
 *        string   exec string and use results for command line
 *        !string  use text following ! as command line, replacing optional %s with html file path
*/
static gchar *html_browsers[] =
{
	/* Redhat has a nifty htmlview script to start the user's preferred browser */
	"htmlview",	NULL,
	/* GNOME 2 */
	"gconftool-2",	"gconftool-2 -g /desktop/gnome/url-handlers/http/command",
	/* KDE */
	"kfmclient",	"!kfmclient exec \"%s\"",
	/* use fallbacks */
	"firefox",	NULL,
	"mozilla",	NULL,
	"konqueror",	NULL,
	"netscape",	NULL,
	NULL,		NULL
};

static void help_browser_run(void)
{
	gchar *result = NULL;
	gint i;

	i = 0;
	while (!result && html_browsers[i])
		{
		result = command_result(html_browsers[i], html_browsers[i+1]);
		i += 2;
		}

	if (!result)
		{
		printf("Unable to detect an installed browser.\n");
		return;
		}

	help_browser_command(result, GQVIEW_HTMLDIR "/index.html");

	g_free(result);
}

/*
 *-----------------------------------------------------------------------------
 * help window
 *-----------------------------------------------------------------------------
 */ 

static GtkWidget *help_window = NULL;

static void help_window_destroy_cb(GtkWidget *window, gpointer data)
{
	help_window = NULL;
}

void help_window_show(const gchar *key)
{
	if (key && strcmp(key, "html_contents") == 0)
		{
		help_browser_run();
		return;
		}

	if (help_window)
		{
		gtk_window_present(GTK_WINDOW(help_window));
		if (key) help_window_set_key(help_window, key);
		return;
		}

	help_window = help_window_new(_("Help - GQview"), "GQview", "help",
                                      GQVIEW_HELPDIR "/README", key);
	g_signal_connect(G_OBJECT(help_window), "destroy",
			 G_CALLBACK(help_window_destroy_cb), NULL);
}


/*
 *-----------------------------------------------------------------------------
 * keyboard functions
 *-----------------------------------------------------------------------------
 */

void keyboard_scroll_calc(gint *x, gint *y, GdkEventKey *event)
{
	static gint delta = 0;
	static guint32 time_old = 0;
	static guint keyval_old = 0;

	if (event->state & GDK_CONTROL_MASK)
		{
		if (*x < 0) *x = G_MININT / 2;
		if (*x > 0) *x = G_MAXINT / 2;
		if (*y < 0) *y = G_MININT / 2;
		if (*y > 0) *y = G_MAXINT / 2;

		return;
		}

	if (progressive_key_scrolling)
		{
		guint32 time_diff;

		time_diff = event->time - time_old;

		/* key pressed within 125ms ? (1/8 second) */
		if (time_diff > 125 || event->keyval != keyval_old) delta = 0;

		time_old = event->time;
		keyval_old = event->keyval;

		delta += 2;
		}
	else
		{
		delta = 8;
		}

	*x = *x * delta;
	*y = *y * delta;
}


/*
 *-----------------------------------------------------------------------------
 * remote functions
 *-----------------------------------------------------------------------------
 */

static void gr_image_next(const gchar *text, gpointer data)
{
	layout_image_next(NULL);
}

static void gr_image_prev(const gchar *text, gpointer data)
{
	layout_image_prev(NULL);
}

static void gr_image_first(const gchar *text, gpointer data)
{
	layout_image_first(NULL);
}

static void gr_image_last(const gchar *text, gpointer data)
{
	layout_image_last(NULL);
}

static void gr_fullscreen_toggle(const gchar *text, gpointer data)
{
	layout_image_full_screen_toggle(NULL);
}

static void gr_fullscreen_start(const gchar *text, gpointer data)
{
	layout_image_full_screen_start(NULL);
}

static void gr_fullscreen_stop(const gchar *text, gpointer data)
{
	layout_image_full_screen_stop(NULL);
}

static void gr_slideshow_start_rec(const gchar *text, gpointer data)
{
	GList *list;

	list = path_list_recursive(text);
	if (!list) return;
printf("length: %d\n", g_list_length(list));
	layout_image_slideshow_stop(NULL);
	layout_image_slideshow_start_from_list(NULL, list);
}

static void gr_slideshow_toggle(const gchar *text, gpointer data)
{
	layout_image_slideshow_toggle(NULL);
}

static void gr_slideshow_start(const gchar *text, gpointer data)
{
	layout_image_slideshow_start(NULL);
}

static void gr_slideshow_stop(const gchar *text, gpointer data)
{
	layout_image_slideshow_stop(NULL);
}

static void gr_slideshow_delay(const gchar *text, gpointer data)
{
	gdouble n;

	n = strtod(text, NULL);
	if (n < SLIDESHOW_MIN_SECONDS || n > SLIDESHOW_MAX_SECONDS)
		{
		gchar *buf;

		buf = g_strdup_printf("Remote slideshow delay out of range (%.1f to %.1f)\n",
				      SLIDESHOW_MIN_SECONDS, SLIDESHOW_MAX_SECONDS);
		print_term(buf);
		g_free(buf);

		return;
		}
	slideshow_delay = (gint)(n * 10.0 + 0.01);
}

static void gr_tools_show(const gchar *text, gpointer data)
{
	gint popped;
	gint hidden;

	if (layout_tools_float_get(NULL, &popped, &hidden) && hidden)
		{
		layout_tools_float_set(NULL, popped, FALSE);
		}
}

static void gr_tools_hide(const gchar *text, gpointer data)
{
	gint popped;
	gint hidden;

	if (layout_tools_float_get(NULL, &popped, &hidden) && !hidden)
		{
		layout_tools_float_set(NULL, popped, TRUE);
		}
}

static gint gr_quit_idle_cb(gpointer data)
{
	exit_gqview();

	return FALSE;
}

static void gr_quit(const gchar *text, gpointer data)
{
	/* schedule exit when idle, if done from within a
	 * remote handler remote_close will crash
	 */
	g_idle_add(gr_quit_idle_cb, NULL);
}

static void gr_file_load(const gchar *text, gpointer data)
{
	if (isfile(text))
		{
		if (file_extension_match(text, ".gqv"))
			{
			collection_window_new(text);
			}
		else
			{
			layout_set_path(NULL, text);
			}
		}
	else if (isdir(text))
		{