## ThunarxMenuProvider

ThunarxMenuProvider — The interface to extensions that provide additional menu items

## Stability Level

Stable, unless otherwise indicated

## Synopsis

    #include <thunarx/thunarx.h>

                        ThunarxMenuProviderIface;
                        ThunarxMenuProvider;
    GList*              thunarx_menu_provider_get_file_actions
                                                            (ThunarxMenuProvider *provider,
                                                             GtkWidget *window,
                                                             GList *files);
    GList*              thunarx_menu_provider_get_folder_actions
                                                            (ThunarxMenuProvider *provider,
                                                             GtkWidget *window,
                                                             ThunarxFileInfo *folder);
    GList*              thunarx_menu_provider_get_dnd_actions
                                                            (ThunarxMenuProvider *provider,
                                                             GtkWidget *window,
                                                             ThunarxFileInfo *folder,
                                                             GList *files);

## Object Hierarchy

      GInterface
       +----ThunarxMenuProvider

## Prerequisites

ThunarxMenuProvider requires GObject.

## Description

The ThunarxMenuProvider interface is implemented by extensions which provide additional menu items that should be displayed in the file or folder context menus for certain types of files.

Extensions that implement this interface should do its best to respond as fast as possible to method invokations by the file manager. That said, when the file manager calls the `thunarx_menu_provider_get_file_actions()` or the `thunarx_menu_provider_get_folder_actions()` method, the implementation in the extension should use only the `thunarx_file_info_has_mime_type()` and `thunarx_file_info_is_directory()` methods to determine the actions that should be added to the file manager's context menu. Don't perform any complicated I/O to determine the action list, as that would block the whole file manager process.

The GtkActions returned from the `thunarx_menu_provider_get_file_actions()` and `thunarx_menu_provider_get_folder_actions()` methods must be namespaced with the module to avoid collision with internal file manager actions and actions provided by other extensions. For example, the menu action provided by the `ThunarOpenTerminal` extension should be called `ThunarOpenTerminal::open-terminal`.

Example 5. Menu provider example

    static void   hello_menu_provider_init (ThunarxMenuProviderIface *iface);
    static GList *hello_get_file_actions   (ThunarxMenuProvider      *provider,
                                            GtkWidget                *window,
                                            GList                    *files);

    THUNARX_DEFINE_TYPE_WITH_CODE (Hello, hello, G_TYPE_OBJECT,
                                   THUNARX_IMPLEMENT_INTERFACE (THUNARX_TYPE_MENU_PROVIDER,
                                                                hello_menu_provider_init));

    static void
    hello_menu_provider_init (ThunarxMenuProviderIface *iface)
    {
      iface->get_file_actions = hello_get_file_actions;
    }

    static void
    hello_activated (GtkWidget *window)
    {
      GtkWidget *dialog;

      dialog = gtk_message_dialog_new (GTK_WINDOW (window),
                                       GTK_DIALOG_MODAL
                                       | GTK_DIALOG_DESTROY_WITH_PARENT,
                                       GTK_MESSAGE_INFO,
                                       GTK_BUTTONS_OK,
                                       "Hello World!");
      gtk_dialog_run (GTK_DIALOG (dialog));
      gtk_widget_destroy (dialog);
    }

    static GList*
    hello_get_file_actions (ThunarxMenuProvider *provider,
                            GtkWidget           *window,
                            GList               *files)
    {
      GtkAction *action;
      GClosure  *closure;

      action = gtk_action_new ("Hello::say-hello", "Say hello", "Say hello", NULL);
      closure = g_cclosure_object_new_swap (G_CALLBACK (hello_activated), G_OBJECT (window));
      g_signal_connect_closure (G_OBJECT (action), "activate", closure, TRUE);

      return g_list_append (NULL, action);
    }

The above example will add an item Say hello to the file context menus as shown in the picture below:

## Details

### ThunarxMenuProviderIface

    typedef struct {
      GList *(*get_file_actions)    (ThunarxMenuProvider *provider,
                                     GtkWidget           *window,
                                     GList               *files);

      GList *(*get_folder_actions)  (ThunarxMenuProvider *provider,
                                     GtkWidget           *window,
                                     ThunarxFileInfo     *folder);

      GList *(*get_dnd_actions)     (ThunarxMenuProvider *provider,
                                     GtkWidget           *window,
                                     ThunarxFileInfo     *folder,
                                     GList               *files);
    } ThunarxMenuProviderIface;

Interface with virtual methods implemented by extensions that provide additional menu items for the file manager's context menus.

Providers don't need to implement all of the virtual methods listed in the interface.

`get_file_actions` () | See `thunarx_menu_provider_get_file_actions()`.
`get_folder_actions` () | See `thunarx_menu_provider_get_folder_actions()`.
`get_dnd_actions` () | See `thunarx_menu_provider_get_dnd_actions()`.

### ThunarxMenuProvider

    typedef struct _ThunarxMenuProvider ThunarxMenuProvider;

Menu provider type.

### thunarx_menu_provider_get_file_actions ()

    GList*              thunarx_menu_provider_get_file_actions
                                                            (ThunarxMenuProvider *provider,
                                                             GtkWidget *window,
                                                             GList *files);

Returns the list of GtkActions that `provider` has to offer for `files`.

As a special note, this method automatically takes a reference on the `provider` for every GtkAction object returned from the real implementation of this method in `provider`. This is to make sure that the extension stays in memory for atleast the time that the actions are used. If the extension wants to stay in memory for a longer time, it'll need to take care of this itself (e.g. by taking an additional reference on the `provider` itself, that's released at a later time).

The caller is responsible to free the returned list of actions using something like this when no longer needed:

    g_list_foreach (list, (GFunc) g_object_unref, NULL);
    g_list_free (list);

`provider` : | a ThunarxMenuProvider.
`window` : | the GtkWindow within which the actions will be used.
`files` : | the list of ThunarxFileInfos to which the actions will be applied.
Returns : | the list of GtkActions that `provider` has to offer for `files`.

### thunarx_menu_provider_get_folder_actions ()

    GList*              thunarx_menu_provider_get_folder_actions
                                                            (ThunarxMenuProvider *provider,
                                                             GtkWidget *window,
                                                             ThunarxFileInfo *folder);

Returns the list of GtkActions that `provider` has to offer for `folder`.

As a special note, this method automatically takes a reference on the `provider` for every GtkAction object returned from the real implementation of this method in `provider`. This is to make sure that the extension stays in memory for atleast the time that the actions are used. If the extension wants to stay in memory for a longer time, it'll need to take care of this itself (e.g. by taking an additional reference on the `provider` itself, that's released at a later time).

The caller is responsible to free the returned list of actions using something like this when no longer needed:

    g_list_foreach (list, (GFunc) g_object_unref, NULL);
    g_list_free (list);

`provider` : | a ThunarxMenuProvider.
`window` : | the GtkWindow within which the actions will be used.
`folder` : | the folder to which the actions should will be applied.
Returns : | the list of GtkActions that `provider` has to offer for `folder`.

### thunarx_menu_provider_get_dnd_actions ()

    GList*              thunarx_menu_provider_get_dnd_actions
                                                            (ThunarxMenuProvider *provider,
                                                             GtkWidget *window,
                                                             ThunarxFileInfo *folder,
                                                             GList *files);

Returns the list of GtkActions that `provider` has to offer for dropping the `files` into the `folder`. For example, the thunar-archive-plugin provides Extract Here actions when dropping archive files into a folder that is writable by the user.

As a special note, this method automatically takes a reference on the `provider` for every GtkAction object returned from the real implementation of this method in `provider`. This is to make sure that the extension stays in memory for atleast the time that the actions are used. If the extension wants to stay in memory for a longer time, it'll need to take care of this itself (e.g. by taking an additional reference on the `provider` itself, that's released at a later time).

The caller is responsible to free the returned list of actions using something like this when no longer needed:

    g_list_foreach (list, (GFunc) g_object_unref, NULL);
    g_list_free (list);

`provider` : | a ThunarxMenuProvider.
`window` : | the GtkWindow within which the actions will be used.
`folder` : | the folder into which the `files` are being dropped
`files` : | the list of ThunarxFileInfos for the files that are being dropped to `folder` in `window`.
Returns : | the list of GtkActions that `provider` has to offer for dropping `files` to `folder`.

Since 0.4.1

## See Also

The description of the ThunarxFileInfo interface.