зеркало из https://github.com/mozilla/pjs.git
365 строки
11 KiB
C++
365 строки
11 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the GNOME helper app implementation.
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*
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* The Initial Developer of the Original Code is
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* IBM Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2003
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Brian Ryner <bryner@brianryner.com> (Original Author)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsGNOMERegistry.h"
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#include "prlink.h"
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#include "prmem.h"
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#include "nsString.h"
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#include "nsIComponentManager.h"
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#include "nsILocalFile.h"
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#include "nsMIMEInfoUnix.h"
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#include "nsAutoPtr.h"
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#include <glib.h>
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#include <glib-object.h>
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static PRLibrary *gconfLib;
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static PRLibrary *gnomeLib;
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static PRLibrary *vfsLib;
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typedef struct _GConfClient GConfClient;
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typedef struct _GnomeProgram GnomeProgram;
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typedef struct _GnomeModuleInfo GnomeModuleInfo;
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typedef struct {
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char *id;
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char *name;
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char *command;
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/* there is more here, but we don't need it */
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} GnomeVFSMimeApplication;
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typedef GConfClient * (*_gconf_client_get_default_fn)();
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typedef gchar * (*_gconf_client_get_string_fn)(GConfClient *,
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const char *, GError **);
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typedef gboolean (*_gconf_client_get_bool_fn)(GConfClient *,
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const char *, GError **);
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typedef gboolean (*_gnome_url_show_fn)(const char *, GError **);
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typedef const char * (*_gnome_vfs_mime_type_from_name_fn)(const char *);
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typedef GList * (*_gnome_vfs_mime_get_extensions_list_fn)(const char *);
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typedef void (*_gnome_vfs_mime_extensions_list_free_fn)(GList *);
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typedef const char * (*_gnome_vfs_mime_get_description_fn)(const char *);
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typedef GnomeVFSMimeApplication * (*_gnome_vfs_mime_get_default_application_fn)
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(const char *);
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typedef void (*_gnome_vfs_mime_application_free_fn)(GnomeVFSMimeApplication *);
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typedef GnomeProgram * (*_gnome_program_init_fn)(const char *, const char *,
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const GnomeModuleInfo *, int,
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char **, const char *, ...);
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typedef const GnomeModuleInfo * (*_libgnome_module_info_get_fn)();
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typedef GnomeProgram * (*_gnome_program_get_fn)();
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#define DECL_FUNC_PTR(func) static _##func##_fn _##func
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DECL_FUNC_PTR(gconf_client_get_default);
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DECL_FUNC_PTR(gconf_client_get_string);
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DECL_FUNC_PTR(gconf_client_get_bool);
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DECL_FUNC_PTR(gnome_url_show);
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DECL_FUNC_PTR(gnome_vfs_mime_type_from_name);
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DECL_FUNC_PTR(gnome_vfs_mime_get_extensions_list);
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DECL_FUNC_PTR(gnome_vfs_mime_extensions_list_free);
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DECL_FUNC_PTR(gnome_vfs_mime_get_description);
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DECL_FUNC_PTR(gnome_vfs_mime_get_default_application);
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DECL_FUNC_PTR(gnome_vfs_mime_application_free);
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DECL_FUNC_PTR(gnome_program_init);
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DECL_FUNC_PTR(libgnome_module_info_get);
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DECL_FUNC_PTR(gnome_program_get);
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static void
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CleanUp()
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{
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// Unload all libraries
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if (gnomeLib) {
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PR_UnloadLibrary(gnomeLib);
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gnomeLib = nsnull;
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}
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if (gconfLib) {
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PR_UnloadLibrary(gconfLib);
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gconfLib = nsnull;
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}
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if (vfsLib) {
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PR_UnloadLibrary(vfsLib);
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vfsLib = nsnull;
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}
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}
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static PRLibrary *
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LoadVersionedLibrary(const char* libName, const char* libVersion)
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{
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char *platformLibName = PR_GetLibraryName(nsnull, libName);
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nsCAutoString versionLibName(platformLibName);
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versionLibName.Append(libVersion);
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PR_FreeLibraryName(platformLibName);
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return PR_LoadLibrary(versionLibName.get());
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}
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/* static */ void
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nsGNOMERegistry::Startup()
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{
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#define ENSURE_LIB(lib) \
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PR_BEGIN_MACRO \
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if (!lib) { \
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CleanUp(); \
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return; \
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} \
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PR_END_MACRO
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#define GET_LIB_FUNCTION(lib, func) \
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PR_BEGIN_MACRO \
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_##func = (_##func##_fn) PR_FindFunctionSymbol(lib##Lib, #func); \
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if (!_##func) { \
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CleanUp(); \
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return; \
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} \
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PR_END_MACRO
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// Attempt to open libgconf
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gconfLib = LoadVersionedLibrary("gconf-2", ".4");
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ENSURE_LIB(gconfLib);
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GET_LIB_FUNCTION(gconf, gconf_client_get_default);
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GET_LIB_FUNCTION(gconf, gconf_client_get_string);
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GET_LIB_FUNCTION(gconf, gconf_client_get_bool);
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// Attempt to open libgnome
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gnomeLib = LoadVersionedLibrary("gnome-2", ".0");
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ENSURE_LIB(gnomeLib);
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GET_LIB_FUNCTION(gnome, gnome_url_show);
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GET_LIB_FUNCTION(gnome, gnome_program_init);
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GET_LIB_FUNCTION(gnome, libgnome_module_info_get);
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GET_LIB_FUNCTION(gnome, gnome_program_get);
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// Attempt to open libgnomevfs
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vfsLib = LoadVersionedLibrary("gnomevfs-2", ".0");
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ENSURE_LIB(vfsLib);
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GET_LIB_FUNCTION(vfs, gnome_vfs_mime_type_from_name);
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GET_LIB_FUNCTION(vfs, gnome_vfs_mime_get_extensions_list);
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GET_LIB_FUNCTION(vfs, gnome_vfs_mime_extensions_list_free);
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GET_LIB_FUNCTION(vfs, gnome_vfs_mime_get_description);
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GET_LIB_FUNCTION(vfs, gnome_vfs_mime_get_default_application);
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GET_LIB_FUNCTION(vfs, gnome_vfs_mime_application_free);
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// Initialize GNOME, if it's not already initialized. It's not
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// necessary to tell GNOME about our actual command line arguments.
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if (!_gnome_program_get()) {
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char *argv[1] = { "gecko" };
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_gnome_program_init("Gecko", "1.0", _libgnome_module_info_get(),
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1, argv, NULL);
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}
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// Note: after GNOME has been initialized, do not ever unload these
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// libraries. They register atexit handlers, so if they are unloaded, we'll
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// crash on exit.
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}
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/**
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* Finds the application for a given protocol.
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*
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* @param aProtocolScheme
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* Protocol to look up. For example, "ghelp" or "mailto".
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*
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* @return UTF-8 string identifying the application. Must be freed with
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* g_free.
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* NULL on error.
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*/
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static gchar* getAppForScheme(const nsACString& aProtocolScheme)
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{
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if (!gconfLib)
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return nsnull;
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GError *error = nsnull;
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GConfClient *client = _gconf_client_get_default();
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NS_ASSERTION(client, "no gconf client");
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nsCAutoString gconfPath(NS_LITERAL_CSTRING("/desktop/gnome/url-handlers/") +
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aProtocolScheme +
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NS_LITERAL_CSTRING("/command"));
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gchar *app = _gconf_client_get_string(client, gconfPath.get(), &error);
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g_object_unref(G_OBJECT(client));
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if (error)
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g_error_free(error);
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return app;
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}
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/* static */ PRBool
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nsGNOMERegistry::HandlerExists(const char *aProtocolScheme)
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{
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gchar *app = getAppForScheme(nsDependentCString(aProtocolScheme));
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if (app) {
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g_free(app);
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GConfClient *client = _gconf_client_get_default();
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nsCAutoString enabledPath(NS_LITERAL_CSTRING("/desktop/gnome/url-handlers/") +
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nsDependentCString(aProtocolScheme) +
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NS_LITERAL_CSTRING("/enabled"));
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gboolean isEnabled = _gconf_client_get_bool(client, enabledPath.get(), NULL);
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g_object_unref(G_OBJECT(client));
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return isEnabled ? PR_TRUE : PR_FALSE;
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}
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return PR_FALSE;
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}
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// XXX Check HandlerExists() before calling LoadURL.
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//
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// If there is not a registered handler for the protocol, gnome_url_show()
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// falls back to using gnomevfs modules. See bug 389632. We don't want
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// this fallback to happen as we are not sure of the safety of all gnomevfs
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// modules and MIME-default applications. (gnomevfs should be handled in
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// nsGnomeVFSProtocolHandler.)
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/* static */ nsresult
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nsGNOMERegistry::LoadURL(nsIURI *aURL)
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{
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if (!gconfLib)
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return NS_ERROR_FAILURE;
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nsCAutoString spec;
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aURL->GetAsciiSpec(spec);
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// XXX what if gnome_url_show() uses the default handler and that's us?
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if (_gnome_url_show(spec.get(), NULL))
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return NS_OK;
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return NS_ERROR_FAILURE;
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}
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/* static */ void
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nsGNOMERegistry::GetAppDescForScheme(const nsACString& aScheme,
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nsAString& aDesc)
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{
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char *app = getAppForScheme(aScheme);
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if (app) {
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CopyUTF8toUTF16(app, aDesc);
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g_free(app);
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}
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}
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/* static */ already_AddRefed<nsMIMEInfoBase>
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nsGNOMERegistry::GetFromExtension(const char *aFileExt)
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{
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if (!gconfLib)
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return nsnull;
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// Get the MIME type from the extension, then call GetFromType to
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// fill in the MIMEInfo.
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nsCAutoString fileExtToUse;
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if (aFileExt && aFileExt[0] != '.')
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fileExtToUse = '.';
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fileExtToUse.Append(aFileExt);
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const char *mimeType = _gnome_vfs_mime_type_from_name(fileExtToUse.get());
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if (!strcmp(mimeType, "application/octet-stream"))
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return nsnull;
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return GetFromType(mimeType);
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}
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/* static */ already_AddRefed<nsMIMEInfoBase>
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nsGNOMERegistry::GetFromType(const char *aMIMEType)
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{
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if (!gconfLib)
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return nsnull;
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GnomeVFSMimeApplication *handlerApp = _gnome_vfs_mime_get_default_application(aMIMEType);
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if (!handlerApp)
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return nsnull;
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nsRefPtr<nsMIMEInfoUnix> mimeInfo = new nsMIMEInfoUnix(aMIMEType);
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NS_ENSURE_TRUE(mimeInfo, nsnull);
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// Get the list of extensions and append then to the mimeInfo.
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GList *extensions = _gnome_vfs_mime_get_extensions_list(aMIMEType);
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for (GList *extension = extensions; extension; extension = extension->next)
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mimeInfo->AppendExtension(nsDependentCString((const char *) extension->data));
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_gnome_vfs_mime_extensions_list_free(extensions);
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const char *description = _gnome_vfs_mime_get_description(aMIMEType);
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mimeInfo->SetDescription(NS_ConvertUTF8toUTF16(description));
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// Convert UTF-8 registry value to filesystem encoding, which
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// g_find_program_in_path() uses.
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gchar *nativeCommand = g_filename_from_utf8(handlerApp->command,
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-1, NULL, NULL, NULL);
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if (!nativeCommand) {
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NS_ERROR("Could not convert helper app command to filesystem encoding");
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_gnome_vfs_mime_application_free(handlerApp);
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return nsnull;
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}
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gchar *commandPath = g_find_program_in_path(nativeCommand);
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g_free(nativeCommand);
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if (!commandPath) {
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_gnome_vfs_mime_application_free(handlerApp);
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return nsnull;
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}
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nsCOMPtr<nsILocalFile> appFile;
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NS_NewNativeLocalFile(nsDependentCString(commandPath), PR_TRUE,
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getter_AddRefs(appFile));
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if (appFile) {
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mimeInfo->SetDefaultApplication(appFile);
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mimeInfo->SetDefaultDescription(NS_ConvertUTF8toUTF16(handlerApp->name));
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mimeInfo->SetPreferredAction(nsIMIMEInfo::useSystemDefault);
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}
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g_free(commandPath);
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_gnome_vfs_mime_application_free(handlerApp);
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nsMIMEInfoBase* retval;
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NS_ADDREF((retval = mimeInfo));
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return retval;
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}
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