pjs/uriloader/exthandler/unix/nsGNOMERegistry.cpp

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C++
Исходник Обычный вид История

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the GNOME helper app implementation.
*
* The Initial Developer of the Original Code is
* IBM Corporation.
* Portions created by the Initial Developer are Copyright (C) 2003
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Brian Ryner <bryner@brianryner.com> (Original Author)
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsGNOMERegistry.h"
#include "prlink.h"
#include "prmem.h"
#include "nsString.h"
#include "nsIComponentManager.h"
#include "nsILocalFile.h"
#include "nsMIMEInfoImpl.h"
#include "nsAutoPtr.h"
#include <glib.h>
#include <glib-object.h>
static PRLibrary *gconfLib;
static PRLibrary *gnomeLib;
static PRLibrary *vfsLib;
typedef struct _GConfClient GConfClient;
typedef struct _GnomeProgram GnomeProgram;
typedef struct _GnomeModuleInfo GnomeModuleInfo;
typedef struct {
char *id;
char *name;
char *command;
/* there is more here, but we don't need it */
} GnomeVFSMimeApplication;
typedef GConfClient * (*_gconf_client_get_default_fn)();
typedef gchar * (*_gconf_client_get_string_fn)(GConfClient *,
const char *, GError **);
typedef gboolean (*_gconf_client_get_bool_fn)(GConfClient *,
const char *, GError **);
typedef gboolean (*_gnome_url_show_fn)(const char *, GError **);
typedef const char * (*_gnome_vfs_mime_type_from_name_fn)(const char *);
typedef GList * (*_gnome_vfs_mime_get_extensions_list_fn)(const char *);
typedef void (*_gnome_vfs_mime_extensions_list_free_fn)(GList *);
typedef const char * (*_gnome_vfs_mime_get_description_fn)(const char *);
typedef GnomeVFSMimeApplication * (*_gnome_vfs_mime_get_default_application_fn)
(const char *);
typedef void (*_gnome_vfs_mime_application_free_fn)(GnomeVFSMimeApplication *);
typedef GnomeProgram * (*_gnome_program_init_fn)(const char *, const char *,
const GnomeModuleInfo *, int,
char **, const char *, ...);
typedef const GnomeModuleInfo * (*_libgnome_module_info_get_fn)();
typedef GnomeProgram * (*_gnome_program_get_fn)();
#define DECL_FUNC_PTR(func) static _##func##_fn _##func
DECL_FUNC_PTR(gconf_client_get_default);
DECL_FUNC_PTR(gconf_client_get_string);
DECL_FUNC_PTR(gconf_client_get_bool);
DECL_FUNC_PTR(gnome_url_show);
DECL_FUNC_PTR(gnome_vfs_mime_type_from_name);
DECL_FUNC_PTR(gnome_vfs_mime_get_extensions_list);
DECL_FUNC_PTR(gnome_vfs_mime_extensions_list_free);
DECL_FUNC_PTR(gnome_vfs_mime_get_description);
DECL_FUNC_PTR(gnome_vfs_mime_get_default_application);
DECL_FUNC_PTR(gnome_vfs_mime_application_free);
DECL_FUNC_PTR(gnome_program_init);
DECL_FUNC_PTR(libgnome_module_info_get);
DECL_FUNC_PTR(gnome_program_get);
static void
CleanUp()
{
// Unload all libraries
if (gnomeLib)
PR_UnloadLibrary(gnomeLib);
if (gconfLib)
PR_UnloadLibrary(gconfLib);
if (vfsLib)
PR_UnloadLibrary(vfsLib);
gnomeLib = gconfLib = vfsLib = nsnull;
}
static PRLibrary *
LoadVersionedLibrary(const char* libName, const char* libVersion)
{
char *platformLibName = PR_GetLibraryName(nsnull, libName);
nsCAutoString versionLibName(platformLibName);
versionLibName.Append(libVersion);
PR_Free(platformLibName);
return PR_LoadLibrary(versionLibName.get());
}
/* static */ void
nsGNOMERegistry::Startup()
{
#define ENSURE_LIB(lib) \
PR_BEGIN_MACRO \
if (!lib) { \
CleanUp(); \
return; \
} \
PR_END_MACRO
#define GET_LIB_FUNCTION(lib, func) \
PR_BEGIN_MACRO \
_##func = (_##func##_fn) PR_FindFunctionSymbol(lib##Lib, #func); \
if (!_##func) { \
CleanUp(); \
return; \
} \
PR_END_MACRO
// Attempt to open libgconf
gconfLib = LoadVersionedLibrary("gconf-2", ".4");
ENSURE_LIB(gconfLib);
GET_LIB_FUNCTION(gconf, gconf_client_get_default);
GET_LIB_FUNCTION(gconf, gconf_client_get_string);
GET_LIB_FUNCTION(gconf, gconf_client_get_bool);
// Attempt to open libgnome
gnomeLib = LoadVersionedLibrary("gnome-2", ".0");
ENSURE_LIB(gnomeLib);
GET_LIB_FUNCTION(gnome, gnome_url_show);
GET_LIB_FUNCTION(gnome, gnome_program_init);
GET_LIB_FUNCTION(gnome, libgnome_module_info_get);
GET_LIB_FUNCTION(gnome, gnome_program_get);
// Attempt to open libgnomevfs
vfsLib = LoadVersionedLibrary("gnomevfs-2", ".0");
ENSURE_LIB(vfsLib);
GET_LIB_FUNCTION(vfs, gnome_vfs_mime_type_from_name);
GET_LIB_FUNCTION(vfs, gnome_vfs_mime_get_extensions_list);
GET_LIB_FUNCTION(vfs, gnome_vfs_mime_extensions_list_free);
GET_LIB_FUNCTION(vfs, gnome_vfs_mime_get_description);
GET_LIB_FUNCTION(vfs, gnome_vfs_mime_get_default_application);
GET_LIB_FUNCTION(vfs, gnome_vfs_mime_application_free);
// Initialize GNOME, if it's not already initialized. It's not
// necessary to tell GNOME about our actual command line arguments.
if (!_gnome_program_get()) {
char *argv[1] = { "gecko" };
_gnome_program_init("Gecko", "1.0", _libgnome_module_info_get(),
1, argv, NULL);
}
// Note: after GNOME has been initialized, do not ever unload these
// libraries. They register atexit handlers, so if they are unloaded, we'll
// crash on exit.
}
/**
* Finds the application for a given protocol.
*
* @param aProtocolScheme
* Protocol to look up. For example, "ghelp" or "mailto".
*
* @return UTF-8 string identifying the application. Must be freed with
* g_free.
* NULL on error.
*/
static gchar* getAppForScheme(const nsACString& aProtocolScheme)
{
if (!gconfLib)
return nsnull;
GConfClient *client = _gconf_client_get_default();
NS_ASSERTION(client, "no gconf client");
nsCAutoString gconfPath(NS_LITERAL_CSTRING("/desktop/gnome/url-handlers/") +
aProtocolScheme +
NS_LITERAL_CSTRING("/command"));
gchar *app = _gconf_client_get_string(client, gconfPath.get(), NULL);
g_object_unref(G_OBJECT(client));
return app;
}
/* static */ PRBool
nsGNOMERegistry::HandlerExists(const char *aProtocolScheme)
{
gchar *app = getAppForScheme(nsDependentCString(aProtocolScheme));
if (app) {
g_free(app);
GConfClient *client = _gconf_client_get_default();
nsCAutoString enabledPath(NS_LITERAL_CSTRING("/desktop/gnome/url-handlers/") +
nsDependentCString(aProtocolScheme) +
NS_LITERAL_CSTRING("/enabled"));
gboolean isEnabled = _gconf_client_get_bool(client, enabledPath.get(), NULL);
g_object_unref(G_OBJECT(client));
return isEnabled ? PR_TRUE : PR_FALSE;
}
return PR_FALSE;
}
/* static */ nsresult
nsGNOMERegistry::LoadURL(nsIURI *aURL)
{
if (!gconfLib)
return NS_ERROR_FAILURE;
nsCAutoString spec;
aURL->GetAsciiSpec(spec);
// XXX what if gnome_url_show() uses the default handler and that's us?
if (_gnome_url_show(spec.get(), NULL))
return NS_OK;
return NS_ERROR_FAILURE;
}
/* static */ void
nsGNOMERegistry::GetAppDescForScheme(const nsACString& aScheme,
nsAString& aDesc)
{
char *app = getAppForScheme(aScheme);
if (app) {
CopyUTF8toUTF16(app, aDesc);
g_free(app);
}
}
/* static */ already_AddRefed<nsMIMEInfoBase>
nsGNOMERegistry::GetFromExtension(const char *aFileExt)
{
if (!gconfLib)
return nsnull;
// Get the MIME type from the extension, then call GetFromType to
// fill in the MIMEInfo.
nsCAutoString fileExtToUse;
if (aFileExt && aFileExt[0] != '.')
fileExtToUse = '.';
fileExtToUse.Append(aFileExt);
const char *mimeType = _gnome_vfs_mime_type_from_name(fileExtToUse.get());
if (!strcmp(mimeType, "application/octet-stream"))
return nsnull;
return GetFromType(mimeType);
}
/* static */ already_AddRefed<nsMIMEInfoBase>
nsGNOMERegistry::GetFromType(const char *aMIMEType)
{
if (!gconfLib)
return nsnull;
GnomeVFSMimeApplication *handlerApp = _gnome_vfs_mime_get_default_application(aMIMEType);
if (!handlerApp)
return nsnull;
nsRefPtr<nsMIMEInfoImpl> mimeInfo = new nsMIMEInfoImpl(aMIMEType);
NS_ENSURE_TRUE(mimeInfo, nsnull);
// Get the list of extensions and append then to the mimeInfo.
GList *extensions = _gnome_vfs_mime_get_extensions_list(aMIMEType);
for (GList *extension = extensions; extension; extension = extension->next)
mimeInfo->AppendExtension(nsDependentCString((const char *) extension->data));
_gnome_vfs_mime_extensions_list_free(extensions);
const char *description = _gnome_vfs_mime_get_description(aMIMEType);
mimeInfo->SetDescription(NS_ConvertUTF8toUCS2(description));
// Convert UTF-8 registry value to filesystem encoding, which
// g_find_program_in_path() uses.
gchar *nativeCommand = g_filename_from_utf8(handlerApp->command,
-1, NULL, NULL, NULL);
if (!nativeCommand) {
NS_ERROR("Could not convert helper app command to filesystem encoding");
_gnome_vfs_mime_application_free(handlerApp);
return nsnull;
}
gchar *commandPath = g_find_program_in_path(nativeCommand);
g_free(nativeCommand);
if (!commandPath) {
_gnome_vfs_mime_application_free(handlerApp);
return nsnull;
}
nsCOMPtr<nsILocalFile> appFile;
NS_NewNativeLocalFile(nsDependentCString(commandPath), PR_TRUE,
getter_AddRefs(appFile));
if (appFile) {
mimeInfo->SetDefaultApplication(appFile);
mimeInfo->SetDefaultDescription(NS_ConvertUTF8toUCS2(handlerApp->name));
mimeInfo->SetPreferredAction(nsIMIMEInfo::useSystemDefault);
}
g_free(commandPath);
_gnome_vfs_mime_application_free(handlerApp);
nsMIMEInfoBase* retval;
NS_ADDREF((retval = mimeInfo));
return retval;
}