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gimp/libgimpconfig/gimpconfig-path.c

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
*
* gimpconfig-path.c
* Copyright (C) 2001 Sven Neumann <sven@gimp.org>
*
* 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 3 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
* Library 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, see
* <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdio.h>
#include <string.h>
#include <gio/gio.h>
#include "libgimpbase/gimpbase.h"
#include "gimpconfig-error.h"
#include "gimpconfig-path.h"
#include "libgimp/libgimp-intl.h"
/**
* SECTION: gimpconfig-path
* @title: GimpConfig-path
* @short_description: File path utilities for libgimpconfig.
*
* File path utilities for libgimpconfig.
**/
/**
* gimp_config_path_get_type:
*
* Reveals the object type
*
* Returns: the #GType for a GimpConfigPath string property
*
* Since: 2.4
**/
GType
gimp_config_path_get_type (void)
{
static GType path_type = 0;
if (! path_type)
{
const GTypeInfo type_info = { 0, };
path_type = g_type_register_static (G_TYPE_STRING, "GimpConfigPath",
&type_info, 0);
}
return path_type;
}
/*
* GIMP_TYPE_PARAM_CONFIG_PATH
*/
#define GIMP_PARAM_SPEC_CONFIG_PATH(pspec) (G_TYPE_CHECK_INSTANCE_CAST ((pspec), GIMP_TYPE_PARAM_CONFIG_PATH, GimpParamSpecConfigPath))
typedef struct _GimpParamSpecConfigPath GimpParamSpecConfigPath;
struct _GimpParamSpecConfigPath
{
GParamSpecString parent_instance;
GimpConfigPathType type;
};
static void gimp_param_config_path_class_init (GParamSpecClass *class);
/**
* gimp_param_config_path_get_type:
*
* Reveals the object type
*
* Returns: the #GType for a directory path object
*
* Since: 2.4
**/
GType
gimp_param_config_path_get_type (void)
{
static GType spec_type = 0;
if (! spec_type)
{
const GTypeInfo type_info =
{
sizeof (GParamSpecClass),
NULL, NULL,
(GClassInitFunc) gimp_param_config_path_class_init,
NULL, NULL,
sizeof (GimpParamSpecConfigPath),
0, NULL, NULL
};
spec_type = g_type_register_static (G_TYPE_PARAM_STRING,
"GimpParamConfigPath",
&type_info, 0);
}
return spec_type;
}
static void
gimp_param_config_path_class_init (GParamSpecClass *class)
{
class->value_type = GIMP_TYPE_CONFIG_PATH;
}
/**
* gimp_param_spec_config_path:
* @name: Canonical name of the param
* @nick: Nickname of the param
* @blurb: Brief description of param.
* @type: a #GimpConfigPathType value.
* @default_value: Value to use if none is assigned.
* @flags: a combination of #GParamFlags
*
* Creates a param spec to hold a filename, dir name,
* or list of file or dir names.
* See g_param_spec_internal() for more information.
*
* Returns: (transfer full): a newly allocated #GParamSpec instance
*
* Since: 2.4
**/
GParamSpec *
gimp_param_spec_config_path (const gchar *name,
const gchar *nick,
const gchar *blurb,
GimpConfigPathType type,
const gchar *default_value,
GParamFlags flags)
{
GParamSpecString *pspec;
pspec = g_param_spec_internal (GIMP_TYPE_PARAM_CONFIG_PATH,
name, nick, blurb, flags);
pspec->default_value = g_strdup (default_value);
GIMP_PARAM_SPEC_CONFIG_PATH (pspec)->type = type;
return G_PARAM_SPEC (pspec);
}
/**
* gimp_param_spec_config_path_type:
* @pspec: A #GParamSpec for a path param
*
* Tells whether the path param encodes a filename,
* dir name, or list of file or dir names.
*
* Returns: a #GimpConfigPathType value
*
* Since: 2.4
**/
GimpConfigPathType
gimp_param_spec_config_path_type (GParamSpec *pspec)
{
g_return_val_if_fail (GIMP_IS_PARAM_SPEC_CONFIG_PATH (pspec), 0);
return GIMP_PARAM_SPEC_CONFIG_PATH (pspec)->type;
}
/*
* GimpConfig path utilities
*/
static gchar * gimp_config_path_expand_only (const gchar *path,
GError **error) G_GNUC_MALLOC;
static inline gchar * gimp_config_path_extract_token (const gchar **str);
static gchar * gimp_config_path_unexpand_only (const gchar *path) G_GNUC_MALLOC;
/**
* gimp_config_build_data_path:
* @name: directory name (in UTF-8 encoding)
*
* Creates a search path as it is used in the gimprc file. The path
* returned by gimp_config_build_data_path() includes a directory
* below the user's gimp directory and one in the system-wide data
* directory.
*
* Note that you cannot use this path directly with gimp_path_parse().
* As it is in the gimprc notation, you first need to expand and
* recode it using gimp_config_path_expand().
*
* Returns: a newly allocated string
*
* Since: 2.4
**/
gchar *
gimp_config_build_data_path (const gchar *name)
{
return g_strconcat ("${gimp_dir}", G_DIR_SEPARATOR_S, name,
G_SEARCHPATH_SEPARATOR_S,
"${gimp_data_dir}", G_DIR_SEPARATOR_S, name,
NULL);
}
/**
* gimp_config_build_plug_in_path:
* @name: directory name (in UTF-8 encoding)
*
* Creates a search path as it is used in the gimprc file. The path
* returned by gimp_config_build_plug_in_path() includes a directory
* below the user's gimp directory and one in the system-wide plug-in
* directory.
*
* Note that you cannot use this path directly with gimp_path_parse().
* As it is in the gimprc notation, you first need to expand and
* recode it using gimp_config_path_expand().
*
* Returns: a newly allocated string
*
* Since: 2.4
**/
gchar *
gimp_config_build_plug_in_path (const gchar *name)
{
return g_strconcat ("${gimp_dir}", G_DIR_SEPARATOR_S, name,
G_SEARCHPATH_SEPARATOR_S,
"${gimp_plug_in_dir}", G_DIR_SEPARATOR_S, name,
NULL);
}
/**
* gimp_config_build_writable_path:
* @name: directory name (in UTF-8 encoding)
*
* Creates a search path as it is used in the gimprc file. The path
* returned by gimp_config_build_writable_path() is just the writable
* parts of the search path constructed by gimp_config_build_data_path().
*
* Note that you cannot use this path directly with gimp_path_parse().
* As it is in the gimprc notation, you first need to expand and
* recode it using gimp_config_path_expand().
*
* Returns: a newly allocated string
*
* Since: 2.4
**/
gchar *
gimp_config_build_writable_path (const gchar *name)
{
return g_strconcat ("${gimp_dir}", G_DIR_SEPARATOR_S, name, NULL);
}
/**
* gimp_config_build_system_path:
* @name: directory name (in UTF-8 encoding)
*
* Creates a search path as it is used in the gimprc file. The path
* returned by gimp_config_build_system_path() is just the read-only
* parts of the search path constructed by gimp_config_build_plug_in_path().
*
* Note that you cannot use this path directly with gimp_path_parse().
* As it is in the gimprc notation, you first need to expand and
* recode it using gimp_config_path_expand().
*
* Returns: a newly allocated string
*
* Since: 2.10.6
**/
gchar *
gimp_config_build_system_path (const gchar *name)
{
return g_strconcat ("${gimp_plug_in_dir}", G_DIR_SEPARATOR_S, name, NULL);
}
/**
* gimp_config_path_expand:
* @path: a NUL-terminated string in UTF-8 encoding
* @recode: whether to convert to the filesystem's encoding
* @error: return location for errors
*
* Paths as stored in gimprc and other config files have to be treated
* special. The string may contain special identifiers such as for
* example ${gimp_dir} that have to be substituted before use. Also
* the user's filesystem may be in a different encoding than UTF-8
* (which is what is used for the gimprc). This function does the
* variable substitution for you and can also attempt to convert to
* the filesystem encoding.
*
* To reverse the expansion, use gimp_config_path_unexpand().
*
* Returns: a newly allocated NUL-terminated string
*
* Since: 2.4
**/
gchar *
gimp_config_path_expand (const gchar *path,
gboolean recode,
GError **error)
{
g_return_val_if_fail (path != NULL, NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
if (recode)
{
gchar *retval;
gchar *expanded = gimp_config_path_expand_only (path, error);
if (! expanded)
return NULL;
retval = g_filename_from_utf8 (expanded, -1, NULL, NULL, error);
g_free (expanded);
return retval;
}
return gimp_config_path_expand_only (path, error);
}
/**
* gimp_config_path_expand_to_files:
* @path: a NUL-terminated string in UTF-8 encoding
* @error: return location for errors
*
* Paths as stored in the gimprc have to be treated special. The
* string may contain special identifiers such as for example
* ${gimp_dir} that have to be substituted before use. Also the user's
* filesystem may be in a different encoding than UTF-8 (which is what
* is used for the gimprc).
*
* This function runs @path through gimp_config_path_expand() and
* gimp_path_parse(), then turns the filenames returned by
* gimp_path_parse() into GFile using g_file_new_for_path().
*
* Returns: (element-type GFile) (transfer full):
a #GList of newly allocated #GFile objects.
*
* Since: 2.10
**/
GList *
gimp_config_path_expand_to_files (const gchar *path,
GError **error)
{
GList *files;
GList *list;
gchar *expanded;
g_return_val_if_fail (path != NULL, NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
expanded = gimp_config_path_expand (path, TRUE, error);
if (! expanded)
return NULL;
files = gimp_path_parse (expanded, 256, FALSE, NULL);
g_free (expanded);
for (list = files; list; list = g_list_next (list))
{
gchar *dir = list->data;
list->data = g_file_new_for_path (dir);
g_free (dir);
}
return files;
}
/**
* gimp_config_path_unexpand:
* @path: a NUL-terminated string
* @recode: whether @path is in filesystem encoding or UTF-8
* @error: return location for errors
*
* The inverse operation of gimp_config_path_expand()
*
* This function takes a @path and tries to substitute the first
* elements by well-known special identifiers such as for example
* ${gimp_dir}. The unexpanded path can then be stored in gimprc and
* other config files.
*
* If @recode is %TRUE then @path is in local filesystem encoding,
* if @recode is %FALSE then @path is assumed to be UTF-8.
*
* Returns: a newly allocated NUL-terminated UTF-8 string
*
* Since: 2.10
**/
gchar *
gimp_config_path_unexpand (const gchar *path,
gboolean recode,
GError **error)
{
g_return_val_if_fail (path != NULL, NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
if (recode)
{
gchar *retval;
gchar *utf8 = g_filename_to_utf8 (path, -1, NULL, NULL, error);
if (! utf8)
return NULL;
retval = gimp_config_path_unexpand_only (utf8);
g_free (utf8);
return retval;
}
return gimp_config_path_unexpand_only (path);
}
/**
* gimp_file_new_for_config_path:
* @path: a NUL-terminated string in UTF-8 encoding
* @error: return location for errors
*
* Expands @path using gimp_config_path_expand() and returns a #GFile
* for the expanded path.
*
* To reverse the expansion, use gimp_file_get_config_path().
*
* Returns: (nullable) (transfer full): a newly allocated #GFile,
* or %NULL if the expansion failed.
*
* Since: 2.10
**/
GFile *
gimp_file_new_for_config_path (const gchar *path,
GError **error)
{
GFile *file = NULL;
gchar *expanded;
g_return_val_if_fail (path != NULL, NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
expanded = gimp_config_path_expand (path, TRUE, error);
if (expanded)
{
file = g_file_new_for_path (expanded);
g_free (expanded);
}
return file;
}
/**
* gimp_file_get_config_path:
* @file: a #GFile
* @error: return location for errors
*
* Unexpands @file's path using gimp_config_path_unexpand() and
* returns the unexpanded path.
*
* The inverse operation of gimp_file_new_for_config_path().
*
* Returns: a newly allocated NUL-terminated UTF-8 string, or %NULL if
* unexpanding failed.
*
* Since: 2.10
**/
gchar *
gimp_file_get_config_path (GFile *file,
GError **error)
{
gchar *unexpanded = NULL;
gchar *path;
g_return_val_if_fail (G_IS_FILE (file), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
path = g_file_get_path (file);
if (path)
{
unexpanded = gimp_config_path_unexpand (path, TRUE, error);
g_free (path);
}
else
{
g_set_error_literal (error, 0, 0,
_("File has no path representation"));
}
return unexpanded;
}
/* private functions */
#define SUBSTS_ALLOC 4
static gchar *
gimp_config_path_expand_only (const gchar *path,
GError **error)
{
const gchar *home;
const gchar *p;
const gchar *s;
gchar *n;
gchar *token;
gchar *filename = NULL;
gchar *expanded = NULL;
gchar **substs = NULL;
guint n_substs = 0;
gint length = 0;
guint i;
home = g_get_home_dir ();
if (home)
home = gimp_filename_to_utf8 (home);
p = path;
while (*p)
{
if (*p == '~' && home)
{
length += strlen (home);
p += 1;
}
else if ((token = gimp_config_path_extract_token (&p)) != NULL)
{
for (i = 0; i < n_substs; i++)
if (strcmp (substs[2*i], token) == 0)
break;
if (i < n_substs)
{
s = substs[2*i+1];
}
else
{
s = NULL;
if (strcmp (token, "gimp_dir") == 0)
s = gimp_directory ();
else if (strcmp (token, "gimp_data_dir") == 0)
s = gimp_data_directory ();
else if (strcmp (token, "gimp_plug_in_dir") == 0 ||
strcmp (token, "gimp_plugin_dir") == 0)
s = gimp_plug_in_directory ();
else if (strcmp (token, "gimp_sysconf_dir") == 0)
s = gimp_sysconf_directory ();
else if (strcmp (token, "gimp_installation_dir") == 0)
s = gimp_installation_directory ();
else if (strcmp (token, "gimp_cache_dir") == 0)
s = gimp_cache_directory ();
else if (strcmp (token, "gimp_temp_dir") == 0)
s = gimp_temp_directory ();
if (!s)
s = g_getenv (token);
#ifdef G_OS_WIN32
/* The default user gimprc on Windows references
* ${TEMP}, but not all Windows installations have that
* environment variable, even if it should be kinda
* standard. So special-case it.
*/
if (!s && strcmp (token, "TEMP") == 0)
s = g_get_tmp_dir ();
#endif /* G_OS_WIN32 */
}
if (!s)
{
g_set_error (error, GIMP_CONFIG_ERROR, GIMP_CONFIG_ERROR_PARSE,
_("Cannot expand ${%s}"), token);
g_free (token);
goto cleanup;
}
if (n_substs % SUBSTS_ALLOC == 0)
substs = g_renew (gchar *, substs, 2 * (n_substs + SUBSTS_ALLOC));
substs[2*n_substs] = token;
substs[2*n_substs + 1] = (gchar *) gimp_filename_to_utf8 (s);
length += strlen (substs[2*n_substs + 1]);
n_substs++;
}
else
{
length += g_utf8_skip[(const guchar) *p];
p = g_utf8_next_char (p);
}
}
if (n_substs == 0)
return g_strdup (path);
expanded = g_new (gchar, length + 1);
p = path;
n = expanded;
while (*p)
{
if (*p == '~' && home)
{
*n = '\0';
strcat (n, home);
n += strlen (home);
p += 1;
}
else if ((token = gimp_config_path_extract_token (&p)) != NULL)
{
for (i = 0; i < n_substs; i++)
{
if (strcmp (substs[2*i], token) == 0)
{
s = substs[2*i+1];
*n = '\0';
strcat (n, s);
n += strlen (s);
break;
}
}
g_free (token);
}
else
{
*n++ = *p++;
}
}
*n = '\0';
cleanup:
for (i = 0; i < n_substs; i++)
g_free (substs[2*i]);
g_free (substs);
g_free (filename);
return expanded;
}
static inline gchar *
gimp_config_path_extract_token (const gchar **str)
{
const gchar *p;
gchar *token;
if (strncmp (*str, "${", 2))
return NULL;
p = *str + 2;
while (*p && (*p != '}'))
p = g_utf8_next_char (p);
if (! *p)
return NULL;
token = g_strndup (*str + 2, g_utf8_pointer_to_offset (*str + 2, p));
*str = p + 1; /* after the closing bracket */
return token;
}
static gchar *
gimp_config_path_unexpand_only (const gchar *path)
{
const struct
{
const gchar *id;
const gchar *prefix;
}
identifiers[] =
{
{ "${gimp_plug_in_dir}", gimp_plug_in_directory () },
{ "${gimp_data_dir}", gimp_data_directory () },
{ "${gimp_sysconf_dir}", gimp_sysconf_directory () },
{ "${gimp_installation_dir}", gimp_installation_directory () },
{ "${gimp_cache_dir}", gimp_cache_directory () },
{ "${gimp_temp_dir}", gimp_temp_directory () },
{ "${gimp_dir}", gimp_directory () }
};
GList *files;
GList *list;
gchar *unexpanded;
files = gimp_path_parse (path, 256, FALSE, NULL);
for (list = files; list; list = g_list_next (list))
{
gchar *dir = list->data;
gint i;
for (i = 0; i < G_N_ELEMENTS (identifiers); i++)
{
if (g_str_has_prefix (dir, identifiers[i].prefix))
{
gchar *tmp = g_strconcat (identifiers[i].id,
dir + strlen (identifiers[i].prefix),
NULL);
g_free (dir);
list->data = tmp;
break;
}
}
}
unexpanded = gimp_path_to_str (files);
gimp_path_free (files);
return unexpanded;
}
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