603 lines
14 KiB
C
603 lines
14 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright 1998-2002 Tim Janik, Red Hat, Inc., and others.
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* Copyright (C) 2003 Alex Graveley
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <string.h>
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#include "gtkmodules.h"
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#include "gtksettings.h"
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#include "gtkdebug.h"
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#include "gtkprivate.h"
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#include "gtkmodulesprivate.h"
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#include "gtkintl.h"
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#include <gmodule.h>
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typedef struct _GtkModuleInfo GtkModuleInfo;
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struct _GtkModuleInfo
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{
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GModule *module;
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gint ref_count;
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GtkModuleInitFunc init_func;
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GtkModuleDisplayInitFunc display_init_func;
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GSList *names;
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};
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static GSList *gtk_modules = NULL;
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static gboolean default_display_opened = FALSE;
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/* Saved argc, argv for delayed module initialization
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*/
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static gint gtk_argc = 0;
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static gchar **gtk_argv = NULL;
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static gchar **
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get_module_path (void)
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{
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const gchar *module_path_env;
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const gchar *exe_prefix;
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gchar *module_path;
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gchar *default_dir;
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static gchar **result = NULL;
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if (result)
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return result;
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module_path_env = g_getenv ("GTK_PATH");
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exe_prefix = g_getenv ("GTK_EXE_PREFIX");
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if (exe_prefix)
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default_dir = g_build_filename (exe_prefix, "lib", "gtk-3.0", NULL);
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else
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default_dir = g_build_filename (_gtk_get_libdir (), "gtk-3.0", NULL);
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if (module_path_env)
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module_path = g_build_path (G_SEARCHPATH_SEPARATOR_S,
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module_path_env, default_dir, NULL);
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else
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module_path = g_build_path (G_SEARCHPATH_SEPARATOR_S,
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default_dir, NULL);
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g_free (default_dir);
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result = pango_split_file_list (module_path);
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g_free (module_path);
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return result;
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}
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/**
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* _gtk_get_module_path:
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* @type: the type of the module, for instance 'modules', 'engines', immodules'
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*
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* Determines the search path for a particular type of module.
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*
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* Returns: the search path for the module type. Free with g_strfreev().
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**/
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gchar **
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_gtk_get_module_path (const gchar *type)
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{
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gchar **paths = get_module_path();
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gchar **path;
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gchar **result;
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gint count = 0;
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for (path = paths; *path; path++)
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count++;
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result = g_new (gchar *, count * 4 + 1);
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count = 0;
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for (path = get_module_path (); *path; path++)
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{
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gint use_version, use_host;
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for (use_version = TRUE; use_version >= FALSE; use_version--)
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for (use_host = TRUE; use_host >= FALSE; use_host--)
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{
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gchar *tmp_dir;
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if (use_version && use_host)
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tmp_dir = g_build_filename (*path, GTK_BINARY_VERSION, GTK_HOST, type, NULL);
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else if (use_version)
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tmp_dir = g_build_filename (*path, GTK_BINARY_VERSION, type, NULL);
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else if (use_host)
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tmp_dir = g_build_filename (*path, GTK_HOST, type, NULL);
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else
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tmp_dir = g_build_filename (*path, type, NULL);
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result[count++] = tmp_dir;
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}
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}
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result[count++] = NULL;
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return result;
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}
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/* Like g_module_path, but use .la as the suffix
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*/
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static gchar*
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module_build_la_path (const gchar *directory,
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const gchar *module_name)
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{
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gchar *filename;
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gchar *result;
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if (strncmp (module_name, "lib", 3) == 0)
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filename = (gchar *)module_name;
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else
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filename = g_strconcat ("lib", module_name, ".la", NULL);
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if (directory && *directory)
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result = g_build_filename (directory, filename, NULL);
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else
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result = g_strdup (filename);
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if (filename != module_name)
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g_free (filename);
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return result;
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}
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/**
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* _gtk_find_module:
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* @name: the name of the module
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* @type: the type of the module, for instance 'modules', 'engines', immodules'
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*
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* Looks for a dynamically module named @name of type @type in the standard GTK+
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* module search path.
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*
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* Returns: the pathname to the found module, or %NULL if it wasn’t found.
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* Free with g_free().
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**/
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gchar *
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_gtk_find_module (const gchar *name,
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const gchar *type)
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{
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gchar **paths;
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gchar **path;
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gchar *module_name = NULL;
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if (g_path_is_absolute (name))
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return g_strdup (name);
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paths = _gtk_get_module_path (type);
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for (path = paths; *path; path++)
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{
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gchar *tmp_name;
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tmp_name = g_module_build_path (*path, name);
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if (g_file_test (tmp_name, G_FILE_TEST_EXISTS))
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{
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module_name = tmp_name;
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goto found;
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}
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g_free(tmp_name);
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tmp_name = module_build_la_path (*path, name);
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if (g_file_test (tmp_name, G_FILE_TEST_EXISTS))
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{
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module_name = tmp_name;
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goto found;
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}
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g_free(tmp_name);
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}
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found:
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g_strfreev (paths);
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return module_name;
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}
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static GModule *
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find_module (const gchar *name)
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{
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GModule *module;
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gchar *module_name;
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module_name = _gtk_find_module (name, "modules");
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if (!module_name)
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{
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/* As last resort, try loading without an absolute path (using system
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* library path)
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*/
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module_name = g_module_build_path (NULL, name);
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}
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module = g_module_open (module_name, G_MODULE_BIND_LOCAL | G_MODULE_BIND_LAZY);
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if (_gtk_module_has_mixed_deps (module))
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{
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g_warning ("GTK+ module %s cannot be loaded.\n"
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"GTK+ 2.x symbols detected. Using GTK+ 2.x and GTK+ 3 in the same process is not supported.", module_name);
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g_module_close (module);
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module = NULL;
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}
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g_free (module_name);
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return module;
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}
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static gint
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cmp_module (GtkModuleInfo *info,
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GModule *module)
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{
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return info->module != module;
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}
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static gboolean
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module_is_blacklisted (const gchar *name,
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gboolean verbose)
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{
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if (g_str_equal (name, "gail") ||
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g_str_equal (name, "atk-bridge"))
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{
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if (verbose)
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g_message ("Not loading module \"%s\": The functionality is provided by GTK natively. Please try to not load it.", name);
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return TRUE;
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}
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return FALSE;
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}
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static GSList *
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load_module (GSList *module_list,
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const gchar *name)
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{
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GtkModuleInitFunc modinit_func;
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gpointer modinit_func_ptr;
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GtkModuleInfo *info = NULL;
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GModule *module = NULL;
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GSList *l;
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gboolean success = FALSE;
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if (g_module_supported ())
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{
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for (l = gtk_modules; l; l = l->next)
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{
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info = l->data;
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if (g_slist_find_custom (info->names, name,
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(GCompareFunc)strcmp))
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{
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info->ref_count++;
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success = TRUE;
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break;
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}
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info = NULL;
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}
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if (!success)
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{
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module = find_module (name);
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if (module)
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{
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/* Do the check this late so we only warn about existing modules,
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* not old modules that are still in the modules path. */
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if (module_is_blacklisted (name, TRUE))
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{
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modinit_func = NULL;
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success = TRUE;
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}
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else if (g_module_symbol (module, "gtk_module_init", &modinit_func_ptr))
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modinit_func = modinit_func_ptr;
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else
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modinit_func = NULL;
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if (!modinit_func)
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g_module_close (module);
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else
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{
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GSList *temp;
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success = TRUE;
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info = NULL;
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temp = g_slist_find_custom (gtk_modules, module,
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(GCompareFunc)cmp_module);
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if (temp != NULL)
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info = temp->data;
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if (!info)
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{
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info = g_new0 (GtkModuleInfo, 1);
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info->names = g_slist_prepend (info->names, g_strdup (name));
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info->module = module;
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info->ref_count = 1;
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info->init_func = modinit_func;
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g_module_symbol (module, "gtk_module_display_init",
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(gpointer *) &info->display_init_func);
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gtk_modules = g_slist_append (gtk_modules, info);
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/* display_init == NULL indicates a non-multihead aware module.
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* For these, we delay the call to init_func until first display is
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* opened, see default_display_notify_cb().
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* For multihead aware modules, we call init_func immediately,
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* and also call display_init_func on all opened displays.
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*/
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if (default_display_opened || info->display_init_func)
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(* info->init_func) (>k_argc, >k_argv);
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if (info->display_init_func)
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{
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GSList *displays, *iter;
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displays = gdk_display_manager_list_displays (gdk_display_manager_get ());
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for (iter = displays; iter; iter = iter->next)
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{
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GdkDisplay *display = iter->data;
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(* info->display_init_func) (display);
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}
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g_slist_free (displays);
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}
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}
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else
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{
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GTK_NOTE (MODULES, g_print ("Module already loaded, ignoring: %s\n", name));
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info->names = g_slist_prepend (info->names, g_strdup (name));
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info->ref_count++;
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/* remove new reference count on module, we already have one */
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g_module_close (module);
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}
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}
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}
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}
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}
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if (success && info)
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{
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if (!g_slist_find (module_list, info))
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{
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module_list = g_slist_prepend (module_list, info);
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}
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}
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else
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{
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if (!module_is_blacklisted (name, FALSE))
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{
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const gchar *error = g_module_error ();
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g_message ("Failed to load module \"%s\"%s%s",
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name, error ? ": " : "", error ? error : "");
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}
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}
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return module_list;
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}
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static void
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gtk_module_info_unref (GtkModuleInfo *info)
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{
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GSList *l;
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info->ref_count--;
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if (info->ref_count == 0)
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{
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GTK_NOTE (MODULES,
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g_print ("Unloading module: %s\n", g_module_name (info->module)));
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gtk_modules = g_slist_remove (gtk_modules, info);
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g_module_close (info->module);
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for (l = info->names; l; l = l->next)
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g_free (l->data);
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g_slist_free (info->names);
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g_free (info);
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}
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}
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static GSList *
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load_modules (const char *module_str)
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{
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gchar **module_names;
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GSList *module_list = NULL;
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gint i;
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GTK_NOTE (MODULES, g_print ("Loading module list: %s\n", module_str));
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module_names = pango_split_file_list (module_str);
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for (i = 0; module_names[i]; i++)
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module_list = load_module (module_list, module_names[i]);
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module_list = g_slist_reverse (module_list);
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g_strfreev (module_names);
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return module_list;
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}
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static void
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default_display_notify_cb (GdkDisplayManager *display_manager)
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{
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GSList *slist;
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/* Initialize non-multihead-aware modules when the
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* default display is first set to a non-NULL value.
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*/
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if (!gdk_display_get_default () || default_display_opened)
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return;
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default_display_opened = TRUE;
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for (slist = gtk_modules; slist; slist = slist->next)
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{
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if (slist->data)
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{
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GtkModuleInfo *info = slist->data;
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if (!info->display_init_func)
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(* info->init_func) (>k_argc, >k_argv);
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}
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}
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}
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static void
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display_closed_cb (GdkDisplay *display,
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gboolean is_error)
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{
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GdkScreen *screen;
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GtkSettings *settings;
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screen = gdk_display_get_screen (display, 0);
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settings = gtk_settings_get_for_screen (screen);
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g_object_set_data_full (G_OBJECT (settings),
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I_("gtk-modules"),
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NULL, NULL);
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}
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static void
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display_opened_cb (GdkDisplayManager *display_manager,
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GdkDisplay *display)
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{
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GValue value = G_VALUE_INIT;
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GSList *slist;
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GdkScreen *screen;
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GtkSettings *settings;
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for (slist = gtk_modules; slist; slist = slist->next)
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{
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if (slist->data)
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{
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GtkModuleInfo *info = slist->data;
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if (info->display_init_func)
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(* info->display_init_func) (display);
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}
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}
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g_value_init (&value, G_TYPE_STRING);
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screen = gdk_display_get_screen (display, 0);
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if (gdk_screen_get_setting (screen, "gtk-modules", &value))
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{
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settings = gtk_settings_get_for_screen (screen);
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_gtk_modules_settings_changed (settings, g_value_get_string (&value));
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g_value_unset (&value);
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}
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/* Since closing display doesn't actually release the resources yet,
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* we have to connect to the ::closed signal.
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*/
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g_signal_connect (display, "closed", G_CALLBACK (display_closed_cb), NULL);
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}
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void
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_gtk_modules_init (gint *argc,
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gchar ***argv,
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const gchar *gtk_modules_args)
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{
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GdkDisplayManager *display_manager;
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gint i;
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g_assert (gtk_argv == NULL);
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if (argc && argv)
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{
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/* store argc and argv for later use in mod initialization */
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gtk_argc = *argc;
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gtk_argv = g_new (gchar *, *argc + 1);
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for (i = 0; i < gtk_argc; i++)
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gtk_argv [i] = g_strdup ((*argv) [i]);
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gtk_argv [*argc] = NULL;
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}
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display_manager = gdk_display_manager_get ();
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default_display_opened = gdk_display_get_default () != NULL;
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g_signal_connect (display_manager, "notify::default-display",
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G_CALLBACK (default_display_notify_cb),
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NULL);
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g_signal_connect (display_manager, "display-opened",
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G_CALLBACK (display_opened_cb),
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NULL);
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if (gtk_modules_args)
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{
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/* Modules specified in the GTK_MODULES environment variable
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* or on the command line are always loaded, so we'll just leak
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* the refcounts.
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*/
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g_slist_free (load_modules (gtk_modules_args));
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}
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}
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static void
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settings_destroy_notify (gpointer data)
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{
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GSList *iter, *modules = data;
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for (iter = modules; iter; iter = iter->next)
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{
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GtkModuleInfo *info = iter->data;
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gtk_module_info_unref (info);
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}
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g_slist_free (modules);
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}
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void
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_gtk_modules_settings_changed (GtkSettings *settings,
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const gchar *modules)
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{
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GSList *new_modules = NULL;
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GTK_NOTE (MODULES, g_print ("gtk-modules setting changed to: %s\n", modules));
|
||
|
||
/* load/ref before unreffing existing */
|
||
if (modules && modules[0])
|
||
new_modules = load_modules (modules);
|
||
|
||
g_object_set_data_full (G_OBJECT (settings),
|
||
I_("gtk-modules"),
|
||
new_modules,
|
||
settings_destroy_notify);
|
||
}
|
||
|
||
/* Return TRUE if module_to_check causes version conflicts.
|
||
* If module_to_check is NULL, check the main module.
|
||
*/
|
||
gboolean
|
||
_gtk_module_has_mixed_deps (GModule *module_to_check)
|
||
{
|
||
GModule *module;
|
||
gpointer func;
|
||
gboolean result;
|
||
|
||
if (!module_to_check)
|
||
module = g_module_open (NULL, 0);
|
||
else
|
||
module = module_to_check;
|
||
|
||
if (g_module_symbol (module, "gtk_progress_get_type", &func))
|
||
result = TRUE;
|
||
else
|
||
result = FALSE;
|
||
|
||
if (!module_to_check)
|
||
g_module_close (module);
|
||
|
||
return result;
|
||
}
|