glib/gio/gcontenttype-win32.c

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/* GIO - GLib Input, Output and Streaming Library
*
* Copyright (C) 2006-2007 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* Author: Alexander Larsson <alexl@redhat.com>
*/
#include "config.h"
#include <sys/types.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "gcontenttype.h"
#include "gthemedicon.h"
#include "gicon.h"
#include "glibintl.h"
#include <windows.h>
static char *
get_registry_classes_key (const char *subdir,
const wchar_t *key_name)
{
wchar_t *wc_key;
HKEY reg_key = NULL;
DWORD key_type;
DWORD nbytes;
char *value_utf8;
value_utf8 = NULL;
nbytes = 0;
wc_key = g_utf8_to_utf16 (subdir, -1, NULL, NULL, NULL);
if (RegOpenKeyExW (HKEY_CLASSES_ROOT, wc_key, 0,
KEY_QUERY_VALUE, &reg_key) == ERROR_SUCCESS &&
RegQueryValueExW (reg_key, key_name, 0,
&key_type, NULL, &nbytes) == ERROR_SUCCESS &&
(key_type == REG_SZ || key_type == REG_EXPAND_SZ))
{
wchar_t *wc_temp = g_new (wchar_t, (nbytes+1)/2 + 1);
RegQueryValueExW (reg_key, key_name, 0,
&key_type, (LPBYTE) wc_temp, &nbytes);
wc_temp[nbytes/2] = '\0';
if (key_type == REG_EXPAND_SZ)
{
wchar_t dummy[1];
int len = ExpandEnvironmentStringsW (wc_temp, dummy, 1);
if (len > 0)
{
wchar_t *wc_temp_expanded = g_new (wchar_t, len);
if (ExpandEnvironmentStringsW (wc_temp, wc_temp_expanded, len) == len)
value_utf8 = g_utf16_to_utf8 (wc_temp_expanded, -1, NULL, NULL, NULL);
g_free (wc_temp_expanded);
}
}
else
{
value_utf8 = g_utf16_to_utf8 (wc_temp, -1, NULL, NULL, NULL);
}
g_free (wc_temp);
}
g_free (wc_key);
if (reg_key != NULL)
RegCloseKey (reg_key);
return value_utf8;
}
gboolean
g_content_type_equals (const gchar *type1,
const gchar *type2)
{
char *progid1, *progid2;
gboolean res;
g_return_val_if_fail (type1 != NULL, FALSE);
g_return_val_if_fail (type2 != NULL, FALSE);
if (g_ascii_strcasecmp (type1, type2) == 0)
return TRUE;
res = FALSE;
progid1 = get_registry_classes_key (type1, NULL);
progid2 = get_registry_classes_key (type2, NULL);
if (progid1 != NULL && progid2 != NULL &&
strcmp (progid1, progid2) == 0)
res = TRUE;
g_free (progid1);
g_free (progid2);
return res;
}
gboolean
g_content_type_is_a (const gchar *type,
const gchar *supertype)
{
gboolean res;
char *value_utf8;
g_return_val_if_fail (type != NULL, FALSE);
g_return_val_if_fail (supertype != NULL, FALSE);
if (g_content_type_equals (type, supertype))
return TRUE;
res = FALSE;
value_utf8 = get_registry_classes_key (type, L"PerceivedType");
if (value_utf8 && strcmp (value_utf8, supertype) == 0)
res = TRUE;
g_free (value_utf8);
return res;
}
gboolean
g_content_type_is_unknown (const gchar *type)
{
g_return_val_if_fail (type != NULL, FALSE);
return strcmp ("*", type) == 0;
}
gchar *
g_content_type_get_description (const gchar *type)
{
char *progid;
char *description;
g_return_val_if_fail (type != NULL, NULL);
progid = get_registry_classes_key (type, NULL);
if (progid)
{
description = get_registry_classes_key (progid, NULL);
g_free (progid);
if (description)
return description;
}
if (g_content_type_is_unknown (type))
return g_strdup (_("Unknown type"));
return g_strdup_printf (_("%s filetype"), type);
}
gchar *
g_content_type_get_mime_type (const gchar *type)
{
char *mime;
g_return_val_if_fail (type != NULL, NULL);
mime = get_registry_classes_key (type, L"Content Type");
if (mime)
return mime;
else if (g_content_type_is_unknown (type))
return g_strdup ("application/octet-stream");
else if (*type == '.')
return g_strdup_printf ("application/x-ext-%s", type+1);
/* TODO: Map "image" to "image/ *", etc? */
return g_strdup ("application/octet-stream");
}
G_LOCK_DEFINE_STATIC (_type_icons);
static GHashTable *_type_icons = NULL;
GIcon *
g_content_type_get_icon (const gchar *type)
{
GIcon *themed_icon;
char *name = NULL;
g_return_val_if_fail (type != NULL, NULL);
/* In the Registry icons are the default value of
HKEY_CLASSES_ROOT\<progid>\DefaultIcon with typical values like:
<type>: <value>
REG_EXPAND_SZ: %SystemRoot%\System32\Wscript.exe,3
REG_SZ: shimgvw.dll,3
*/
G_LOCK (_type_icons);
if (!_type_icons)
_type_icons = g_hash_table_new (g_str_hash, g_str_equal);
name = g_hash_table_lookup (_type_icons, type);
if (!name && type[0] == '.')
{
/* double lookup by extension */
gchar *key = get_registry_classes_key (type, NULL);
if (!key)
key = g_strconcat (type+1, "file\\DefaultIcon", NULL);
else
{
gchar *key2 = g_strconcat (key, "\\DefaultIcon", NULL);
g_free (key);
key = key2;
}
name = get_registry_classes_key (key, NULL);
if (name && strcmp (name, "%1") == 0)
{
g_free (name);
name = NULL;
}
if (name)
g_hash_table_insert (_type_icons, g_strdup (type), g_strdup (name));
g_free (key);
}
/* icon-name similar to how it was with gtk-2-12 */
if (name)
{
themed_icon = g_themed_icon_new (name);
}
else
{
/* if not found an icon fall back to gtk-builtins */
name = strcmp (type, "inode/directory") == 0 ? "gtk-directory" :
g_content_type_can_be_executable (type) ? "gtk-execute" : "gtk-file";
g_hash_table_insert (_type_icons, g_strdup (type), g_strdup (name));
themed_icon = g_themed_icon_new_with_default_fallbacks (name);
}
G_UNLOCK (_type_icons);
return G_ICON (themed_icon);
}
gboolean
g_content_type_can_be_executable (const gchar *type)
{
g_return_val_if_fail (type != NULL, FALSE);
if (strcmp (type, ".exe") == 0 ||
strcmp (type, ".com") == 0 ||
strcmp (type, ".bat") == 0)
return TRUE;
/* TODO: Also look at PATHEXT, which lists the extensions for
* "scripts" in addition to those for true binary executables.
*
* (PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH for me
* right now, for instance). And in a sense, all associated file
* types are "executable" on Windows... You can just type foo.jpg as
* a command name in cmd.exe, and it will run the application
* associated with .jpg. Hard to say what this API actually means
* with "executable".
*/
return FALSE;
}
static gboolean
looks_like_text (const guchar *data,
gsize data_size)
{
gsize i;
guchar c;
for (i = 0; i < data_size; i++)
{
c = data[i];
if (g_ascii_iscntrl (c) && !g_ascii_isspace (c) && c != '\b')
return FALSE;
}
return TRUE;
}
gchar *
g_content_type_from_mime_type (const gchar *mime_type)
{
char *key, *content_type;
g_return_val_if_fail (mime_type != NULL, NULL);
key = g_strconcat ("MIME\\DataBase\\Content Type\\", mime_type, NULL);
content_type = get_registry_classes_key (key, L"Extension");
g_free (key);
return content_type;
}
gchar *
g_content_type_guess (const gchar *filename,
const guchar *data,
gsize data_size,
gboolean *result_uncertain)
{
char *basename;
char *type;
char *dot;
type = NULL;
if (result_uncertain)
*result_uncertain = FALSE;
/* our test suite and potentially other code used -1 in the past, which is
* not documented and not allowed; guard against that */
g_return_val_if_fail (data_size != (gsize) -1, g_strdup ("*"));
if (filename)
{
basename = g_path_get_basename (filename);
dot = strrchr (basename, '.');
if (dot)
type = g_strdup (dot);
g_free (basename);
}
if (type)
return type;
if (data && looks_like_text (data, data_size))
return g_strdup (".txt");
return g_strdup ("*");
}
GList *
g_content_types_get_registered (void)
{
DWORD index;
wchar_t keyname[256];
DWORD key_len;
char *key_utf8;
GList *types;
types = NULL;
index = 0;
key_len = 256;
while (RegEnumKeyExW(HKEY_CLASSES_ROOT,
index,
keyname,
&key_len,
NULL,
NULL,
NULL,
NULL) == ERROR_SUCCESS)
{
key_utf8 = g_utf16_to_utf8 (keyname, -1, NULL, NULL, NULL);
if (key_utf8)
{
if (*key_utf8 == '.')
types = g_list_prepend (types, key_utf8);
else
g_free (key_utf8);
}
index++;
key_len = 256;
}
return g_list_reverse (types);
}
gchar **
g_content_type_guess_for_tree (GFile *root)
{
/* FIXME: implement */
return NULL;
}