GAppInfo and gio.AppLaunchContext are used for describing and launching applications installed on the system.

As of GLib 2.20, URIs will always be converted to POSIX paths (using g_file_get_path()) when using g_app_info_launch() even if the application requested an URI and not a POSIX path. For example for a desktop-file based application with Exec key `totem U and a single URI, sftp://foo/file.avi`, then /home/user/.gvfs/sftp on foo/file.avi will be passed. This will only work if a set of suitable GIO extensions (such as gvfs 2.26 compiled with FUSE support), is available and operational; if this is not the case, the URI will be passed unmodified to the application. Some URIs, such as mailto:, of course cannot be mapped to a POSIX path (in gvfs there's no FUSE mount for it); such URIs will be passed unmodified to the application.

Specifically for gvfs 2.26 and later, the POSIX URI will be mapped back to the GIO URI in the GFile constructors (since gvfs implements the gio.Vfs extension point). As such, if the application needs to examine the URI, it needs to use g_file_get_uri() or similar on GFile In other words, an application cannot assume that the URI passed to e.g. g_file_new_for_commandline_arg() is equal to the result of g_file_get_uri(). The following snippet illustrates this:

|[ GFile *f; char *uri;

file = g_file_new_for_commandline_arg (uri_from_commandline);

uri = g_file_get_uri (file); strcmp (uri, uri_from_commandline) == 0; g_free (uri);

if (g_file_has_uri_scheme (file, "cdda")) { // do something special with uri } g_object_unref (file);

This code will work when both `cdda://sr0/Track 1.wav` and
`/home/user/.gvfs/cdda on sr0/Track 1.wav` is passed to the
application. It should be noted that it's generally not safe
for applications to rely on the format of a particular URIs.
Different launcher applications (e.g. file managers) may have
different ideas of what a given URI means.



bool addSupportsType(string contentType)

Adds a content type to the application information to indicate the application is capable of opening files with the given content type.

bool canDelete()

Obtains the information whether the GAppInfo can be deleted. See g_app_info_delete().

bool canRemoveSupportsType()

Checks if a supported content type can be removed from an application.

bool delete_()

Tries to delete a GAppInfo

AppInfoIF dup()

Creates a duplicate of a GAppInfo

bool equal(AppInfoIF appinfo2)

Checks if two GAppInfos are equal.

GAppInfo* getAppInfoStruct(bool transferOwnership)

Get the main Gtk struct

string getCommandline()

Gets the commandline with which the application will be started.

string getDescription()

Gets a human-readable description of an installed application.

string getDisplayName()

Gets the display name of the application. The display name is often more descriptive to the user than the name itself.

string getExecutable()

Gets the executable's name for the installed application.

IconIF getIcon()

Gets the icon for the application.

string getId()

Gets the ID of an application. An id is a string that identifies the application. The exact format of the id is platform dependent. For instance, on Unix this is the desktop file id from the xdg menu specification.

string getName()

Gets the installed name of the application.

string[] getSupportedTypes()

Retrieves the list of content types that app_info claims to support. If this information is not provided by the environment, this function will return NULL. This function does not take in consideration associations added with g_app_info_add_supports_type(), but only those exported directly by the application.

bool launch(ListG files, AppLaunchContext context)

Launches the application. Passes files to the launched application as arguments, using the optional context to get information about the details of the launcher (like what screen it is on). On error, error will be set accordingly.

bool launchUris(ListG uris, AppLaunchContext context)

Launches the application. This passes the uris to the launched application as arguments, using the optional context to get information about the details of the launcher (like what screen it is on). On error, error will be set accordingly.

void launchUrisAsync(ListG uris, AppLaunchContext context, Cancellable cancellable, GAsyncReadyCallback callback, void* userData)

Async version of g_app_info_launch_uris().

bool launchUrisFinish(AsyncResultIF result)

Finishes a g_app_info_launch_uris_async() operation.

bool removeSupportsType(string contentType)

Removes a supported type from an application, if possible.

bool setAsDefaultForExtension(string extension)

Sets the application as the default handler for the given file extension.

bool setAsDefaultForType(string contentType)

Sets the application as the default handler for a given type.

bool setAsLastUsedForType(string contentType)

Sets the application as the last used application for a given type. This will make the application appear as first in the list returned by g_app_info_get_recommended_for_type(), regardless of the default application for that content type.

bool shouldShow()

Checks if the application info should be shown in menus that list available applications.

bool supportsFiles()

Checks if the application accepts files as arguments.

bool supportsUris()

Checks if the application supports reading files and directories from URIs.