Browser
/* $Id$ */
/* Copyright (c) 2015-2022 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS Desktop Browser */
/* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY ITS AUTHORS AND CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
#include <fcntl.h>
#include <dirent.h>
#include <unistd.h>
#include <string.h>
#include <System.h>
#include <libintl.h>
#if defined(__APPLE__)
# include <errno.h>
#elif defined(__linux__)
# include <sys/syscall.h>
# include <unistd.h>
# include <errno.h>
#endif
#include "Browser.h"
#define _(string) gettext(string)
#define N_(string) (string)
/* Undelete */
/* private */
/* types */
#ifdef __linux__
typedef struct _UndeleteDirent
{
unsigned long d_ino;
unsigned long d_off;
unsigned short d_reclen;
char d_name[0];
} UndeleteDirent;
#else
typedef struct dirent UndeleteDirent;
#endif
enum _UndeleteColumn
{
UC_ICON,
UC_FILENAME
};
#define UC_LAST UC_FILENAME
#define UC_COUNT (UC_LAST + 1)
typedef struct _BrowserPlugin
{
BrowserPluginHelper * helper;
guint source;
/* refresh */
char * selection;
int fd;
/* widgets */
GtkWidget * window;
GtkListStore * store;
GtkWidget * view;
} Undelete;
/* prototypes */
/* plug-in */
static Undelete * _undelete_init(BrowserPluginHelper * helper);
static void _undelete_destroy(Undelete * undelete);
static GtkWidget * _undelete_get_widget(Undelete * undelete);
static void _undelete_refresh(Undelete * undelete, GList * selection);
/* useful */
#if defined(__APPLE__) || defined(__linux__)
static int getdents(int fd, char * buf, unsigned int count);
#endif
/* callbacks */
static gboolean _undelete_on_idle(gpointer data);
/* public */
/* variables */
BrowserPluginDefinition plugin =
{
N_("Undelete"),
"image-missing",
NULL,
_undelete_init,
_undelete_destroy,
_undelete_get_widget,
_undelete_refresh
};
/* private */
/* functions */
/* undelete_init */
static Undelete * _undelete_init(BrowserPluginHelper * helper)
{
Undelete * undelete;
GtkCellRenderer * renderer;
GtkTreeViewColumn * column;
if((undelete = object_new(sizeof(*undelete))) == NULL)
return NULL;
undelete->helper = helper;
undelete->source = 0;
undelete->selection = NULL;
undelete->fd = -1;
undelete->window = gtk_scrolled_window_new(NULL, NULL);
gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(undelete->window),
GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
undelete->store = gtk_list_store_new(UC_COUNT,
GDK_TYPE_PIXBUF, /* UC_ICON */
G_TYPE_STRING); /* UC_FILENAME */
undelete->view = gtk_tree_view_new_with_model(GTK_TREE_MODEL(
undelete->store));
gtk_tree_view_set_headers_visible(GTK_TREE_VIEW(undelete->view), TRUE);
/* icon */
renderer = gtk_cell_renderer_pixbuf_new();
column = gtk_tree_view_column_new_with_attributes(NULL, renderer,
"pixbuf", UC_ICON, NULL);
gtk_tree_view_append_column(GTK_TREE_VIEW(undelete->view), column);
/* filename */
renderer = gtk_cell_renderer_text_new();
column = gtk_tree_view_column_new_with_attributes(_("Filename"),
renderer, "text", UC_FILENAME, NULL);
gtk_tree_view_append_column(GTK_TREE_VIEW(undelete->view), column);
gtk_container_add(GTK_CONTAINER(undelete->window), undelete->view);
gtk_widget_show_all(undelete->window);
return undelete;
}
/* undelete_destroy */
static void _undelete_destroy(Undelete * undelete)
{
if(undelete->source != 0)
g_source_remove(undelete->source);
if(undelete->fd >= 0)
close(undelete->fd);
string_delete(undelete->selection);
object_delete(undelete);
}
/* undelete_get_widget */
static GtkWidget * _undelete_get_widget(Undelete * undelete)
{
return undelete->window;
}
/* undelete_refresh */
static void _undelete_refresh(Undelete * undelete, GList * selection)
{
if(undelete->source != 0)
g_source_remove(undelete->source);
if(undelete->fd >= 0)
close(undelete->fd);
undelete->fd = -1;
string_delete(undelete->selection);
undelete->selection = NULL;
if(selection == NULL
|| selection->data == NULL
|| (undelete->selection = string_new(selection->data))
== NULL)
undelete->source = 0;
else
undelete->source = g_idle_add(_undelete_on_idle, undelete);
}
/* useful */
#if defined(__APPLE__)
static int getdents(int fd, char * buf, unsigned int count)
{
(void) fd;
(void) buf;
(void) count;
errno = ENOSYS;
return -1;
}
#elif defined(__linux__)
static int getdents(int fd, char * buf, unsigned int count)
{
return syscall(__NR_getdents64, fd, buf, count);
}
#endif
/* callbacks */
/* undelete_on_idle */
static gboolean _undelete_on_idle(gpointer data)
{
Undelete * undelete = data;
char buf[65536];
int i;
int j;
UndeleteDirent de;
size_t namlen;
if(undelete->fd < 0)
{
if((undelete->fd = open(undelete->selection, O_RDONLY)) < 0)
{
undelete->helper->error(undelete->helper->browser,
undelete->selection, 1);
undelete->source = 0;
return FALSE;
}
return TRUE;
}
if((i = getdents(undelete->fd, buf, sizeof(buf))) < 0)
undelete->helper->error(undelete->helper->browser,
undelete->selection, 1);
else if(i > 0)
{
for(j = 0; j + (int)sizeof(de) < i; j += de.d_reclen)
{
memcpy(&de, &buf[j], sizeof(de));
#ifdef __linux__
namlen = de.d_reclen - 2
- offsetof(UndeleteDirent, d_name);
#else
namlen = de.d_namlen;
#endif
if(strncmp(de.d_name, ".", 1) == 0 && namlen == 1)
continue;
if(strncmp(de.d_name, "..", 2) == 0 && namlen == 2)
continue;
/* FIXME implement */
}
return TRUE;
}
close(undelete->fd);
string_delete(undelete->selection);
undelete->selection = NULL;
undelete->source = 0;
return FALSE;
}