medit/moo/mooedit/moofileview-icons.c
2005-08-05 06:50:04 +00:00

320 lines
8.9 KiB
C

/*
* mooutils/moofileview-icons.c
*
* Copyright (C) 2004-2005 by Yevgen Muntyan <muntyan@math.tamu.edu>
*
* This program 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; either version 2 of the License, or
* (at your option) any later version.
*
* See COPYING file that comes with this distribution.
*/
#include "mooedit/moofileview.h"
#include <sys/stat.h>
#include <errno.h>
#include <string.h>
/* Icon type, supplemented by MIME type
*/
typedef enum {
ICON_NOENT,
ICON_NONE, /* "Could not compute the icon type" */
ICON_REGULAR, /* Use mime type for icon */
ICON_BLOCK_DEVICE,
ICON_BROKEN_SYMBOLIC_LINK,
ICON_CHARACTER_DEVICE,
ICON_DIRECTORY,
ICON_EXECUTABLE,
ICON_FIFO,
ICON_SOCKET
} IconType;
typedef struct {
gint size;
GdkPixbuf *pixbuf;
} IconCacheElement;
static void icon_cache_element_free (IconCacheElement *element)
{
if (element->pixbuf)
g_object_unref (element->pixbuf);
g_free (element);
}
static void icon_theme_changed (GtkIconTheme *icon_theme)
{
GHashTable *cache;
/* Difference from the initial creation is that we don't
* reconnect the signal */
cache = g_hash_table_new_full (g_str_hash, g_str_equal,
(GDestroyNotify)g_free,
(GDestroyNotify)icon_cache_element_free);
g_object_set_data_full (G_OBJECT (icon_theme), "gtk-file-icon-cache",
cache, (GDestroyNotify)g_hash_table_destroy);
}
static IconType get_icon_type_from_stat (const struct stat *statp)
{
if (S_ISBLK (statp->st_mode))
return ICON_BLOCK_DEVICE;
else if (S_ISLNK (statp->st_mode))
return ICON_BROKEN_SYMBOLIC_LINK; /* See get_icon_type */
else if (S_ISCHR (statp->st_mode))
return ICON_CHARACTER_DEVICE;
else if (S_ISDIR (statp->st_mode))
return ICON_DIRECTORY;
#ifdef S_ISFIFO
else if (S_ISFIFO (statp->st_mode))
return ICON_FIFO;
#endif
#ifdef S_ISSOCK
else if (S_ISSOCK (statp->st_mode))
return ICON_SOCKET;
#endif
else
return ICON_REGULAR;
}
static IconType get_icon_type (MooFileViewFile *file)
{
const struct stat *statp = moo_file_view_file_get_stat (file);
if (statp)
return get_icon_type_from_stat (statp);
else
return ICON_NOENT;
}
static GdkPixbuf *get_cached_icon (GtkWidget *widget,
const gchar *name,
gint pixel_size)
{
GtkIconTheme *icon_theme = gtk_icon_theme_get_for_screen (gtk_widget_get_screen (widget));
GHashTable *cache = g_object_get_data (G_OBJECT (icon_theme), "gtk-file-icon-cache");
IconCacheElement *element;
if (!cache)
{
cache = g_hash_table_new_full (g_str_hash, g_str_equal,
(GDestroyNotify)g_free,
(GDestroyNotify)icon_cache_element_free);
g_object_set_data_full (G_OBJECT (icon_theme), "gtk-file-icon-cache",
cache, (GDestroyNotify)g_hash_table_destroy);
g_signal_connect (icon_theme, "changed",
G_CALLBACK (icon_theme_changed), NULL);
}
element = g_hash_table_lookup (cache, name);
if (!element)
{
element = g_new0 (IconCacheElement, 1);
g_hash_table_insert (cache, g_strdup (name), element);
}
if (element->size != pixel_size)
{
if (element->pixbuf)
g_object_unref (element->pixbuf);
element->size = pixel_size;
element->pixbuf = gtk_icon_theme_load_icon (icon_theme, name,
pixel_size, 0, NULL);
}
return element->pixbuf;
}
static GdkPixbuf *get_icon_for_mime_type (GtkWidget *widget,
const char *mime_type,
gint pixel_size)
{
const char *separator;
GString *icon_name;
GdkPixbuf *pixbuf;
separator = strchr (mime_type, '/');
if (!separator)
return NULL; /* maybe we should return a GError with "invalid MIME-type" */
icon_name = g_string_new ("gnome-mime-");
g_string_append_len (icon_name, mime_type, separator - mime_type);
g_string_append_c (icon_name, '-');
g_string_append (icon_name, separator + 1);
pixbuf = get_cached_icon (widget, icon_name->str, pixel_size);
g_string_free (icon_name, TRUE);
if (pixbuf)
return pixbuf;
icon_name = g_string_new ("gnome-mime-");
g_string_append_len (icon_name, mime_type, separator - mime_type);
pixbuf = get_cached_icon (widget, icon_name->str, pixel_size);
g_string_free (icon_name, TRUE);
return pixbuf;
}
/* Returns the name of the icon to be used for a path which is known to be a
* directory. This can vary for Home, Desktop, etc.
*/
static const char *get_icon_name_for_directory (const char *path)
{
static char *desktop_path = NULL;
if (!g_get_home_dir ())
return "gnome-fs-directory";
if (!desktop_path)
desktop_path = g_build_filename (g_get_home_dir (), "Desktop", NULL);
if (strcmp (g_get_home_dir (), path) == 0)
return "gnome-fs-home";
else if (strcmp (desktop_path, path) == 0)
return "gnome-fs-desktop";
else
return "gnome-fs-directory";
}
/* Renders an icon for a non-ICON_REGULAR file */
static GdkPixbuf *get_special_icon (IconType icon_type,
MooFileViewFile *file,
GtkWidget *widget,
gint pixel_size)
{
const char *name;
g_assert (icon_type != ICON_REGULAR);
switch (icon_type)
{
case ICON_BLOCK_DEVICE:
name = "gnome-fs-blockdev";
break;
case ICON_BROKEN_SYMBOLIC_LINK:
name = "gnome-fs-symlink";
break;
case ICON_CHARACTER_DEVICE:
name = "gnome-fs-chardev";
break;
case ICON_DIRECTORY:
name = get_icon_name_for_directory
(moo_file_view_file_path (file));
break;
case ICON_EXECUTABLE:
name ="gnome-fs-executable";
break;
case ICON_FIFO:
name = "gnome-fs-fifo";
break;
case ICON_SOCKET:
name = "gnome-fs-socket";
break;
default:
g_assert_not_reached ();
return NULL;
}
return get_cached_icon (widget, name, pixel_size);
}
/* Renders a fallback icon from the stock system */
static GdkPixbuf *get_fallback_icon (GtkWidget *widget,
IconType icon_type,
GtkIconSize size)
{
const char *stock_name;
GdkPixbuf *pixbuf;
switch (icon_type)
{
case ICON_BLOCK_DEVICE:
stock_name = GTK_STOCK_HARDDISK;
break;
case ICON_DIRECTORY:
stock_name = GTK_STOCK_DIRECTORY;
break;
case ICON_EXECUTABLE:
stock_name = GTK_STOCK_EXECUTE;
break;
case ICON_NOENT:
stock_name = GTK_STOCK_MISSING_IMAGE;
break;
default:
stock_name = GTK_STOCK_FILE;
break;
}
pixbuf = gtk_widget_render_icon (widget, stock_name, size, NULL);
if (!pixbuf)
{
g_warning ("%s: could not get a stock icon for %s",
G_STRLOC, stock_name);
}
return pixbuf;
}
GdkPixbuf *moo_get_icon_for_file (GtkWidget *widget,
MooFileViewFile *file,
GtkIconSize size)
{
IconType icon_type;
GdkPixbuf *pixbuf;
int pixel_size;
icon_type = get_icon_type (file);
if (icon_type == ICON_REGULAR && !moo_file_view_file_mime_type (file))
icon_type = ICON_NONE;
if (!gtk_icon_size_lookup (size, &pixel_size, NULL))
if (!gtk_icon_size_lookup (GTK_ICON_SIZE_MENU, &pixel_size, NULL))
pixel_size = 16;
switch (icon_type)
{
case ICON_NONE:
goto fallback;
case ICON_NOENT:
pixbuf = get_fallback_icon (widget, icon_type, size);
break;
case ICON_REGULAR:
pixbuf = get_icon_for_mime_type (widget,
moo_file_view_file_mime_type (file),
pixel_size);
break;
default:
pixbuf = get_special_icon (icon_type, file, widget, pixel_size);
}
if (pixbuf)
goto out;
fallback:
pixbuf = get_cached_icon (widget, "gnome-fs-regular", pixel_size);
if (!pixbuf)
pixbuf = get_fallback_icon (widget, icon_type, size);
out:
return pixbuf;
}