diff options
Diffstat (limited to 'gtk/gtkdnd.c')
| -rw-r--r-- | gtk/gtkdnd.c | 156 |
1 files changed, 155 insertions, 1 deletions
diff --git a/gtk/gtkdnd.c b/gtk/gtkdnd.c index 085a7a9774..dd2a0034e0 100644 --- a/gtk/gtkdnd.c +++ b/gtk/gtkdnd.c @@ -960,6 +960,150 @@ gtk_drag_dest_drop (GtkWidget *widget, * Source side * ***************/ +#define GTK_TYPE_DRAG_CONTENT (gtk_drag_content_get_type ()) +#define GTK_DRAG_CONTENT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_DRAG_CONTENT, GtkDragContent)) +#define GTK_IS_DRAG_CONTENT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_DRAG_CONTENT)) +#define GTK_DRAG_CONTENT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_DRAG_CONTENT, GtkDragContentClass)) +#define GTK_IS_DRAG_CONTENT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_DRAG_CONTENT)) +#define GTK_DRAG_CONTENT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_DRAG_CONTENT, GtkDragContentClass)) + +typedef struct _GtkDragContent GtkDragContent; +typedef struct _GtkDragContentClass GtkDragContentClass; + +struct _GtkDragContent +{ + GdkContentProvider parent; + + GtkWidget *widget; + GdkDragContext *context; + GdkContentFormats *formats; + guint32 time; +}; + +struct _GtkDragContentClass +{ + GdkContentProviderClass parent_class; +}; + +GType gtk_drag_content_get_type (void) G_GNUC_CONST; + +G_DEFINE_TYPE (GtkDragContent, gtk_drag_content, GDK_TYPE_CONTENT_PROVIDER) + +static GdkContentFormats * +gtk_drag_content_ref_formats (GdkContentProvider *provider) +{ + GtkDragContent *content = GTK_DRAG_CONTENT (provider); + + return gdk_content_formats_ref (content->formats); +} + +static void +gtk_drag_content_write_mime_type_done (GObject *stream, + GAsyncResult *result, + gpointer task) +{ + GError *error = NULL; + + if (!g_output_stream_write_all_finish (G_OUTPUT_STREAM (stream), + result, + NULL, + &error)) + { + g_task_return_error (task, error); + } + else + { + g_task_return_boolean (task, TRUE); + } + + g_object_unref (task); +} + +static void +gtk_drag_content_write_mime_type_async (GdkContentProvider *provider, + const char *mime_type, + GOutputStream *stream, + int io_priority, + GCancellable *cancellable, + GAsyncReadyCallback callback, + gpointer user_data) +{ + GtkDragContent *content = GTK_DRAG_CONTENT (provider); + GtkSelectionData sdata = { 0, }; + GTask *task; + + task = g_task_new (content, cancellable, callback, user_data); + g_task_set_priority (task, io_priority); + g_task_set_source_tag (task, gtk_drag_content_write_mime_type_async); + + sdata.selection = gdk_drag_get_selection (content->context); + sdata.target = gdk_atom_intern (mime_type, FALSE); + sdata.length = -1; + sdata.display = gtk_widget_get_display (content->widget); + + g_signal_emit_by_name (content->widget, "drag-data-get", + content->context, + &sdata, + content->time); + + if (sdata.length == -1) + { + g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_FAILED, + _("Cannot provide contents as “%s”"), mime_type); + g_object_unref (task); + return; + } + g_task_set_task_data (task, sdata.data, g_free); + + g_output_stream_write_all_async (stream, + sdata.data, + sdata.length, + io_priority, + cancellable, + gtk_drag_content_write_mime_type_done, + task); +} + +static gboolean +gtk_drag_content_write_mime_type_finish (GdkContentProvider *provider, + GAsyncResult *result, + GError **error) +{ + g_return_val_if_fail (g_task_is_valid (result, provider), FALSE); + g_return_val_if_fail (g_task_get_source_tag (G_TASK (result)) == gtk_drag_content_write_mime_type_async, FALSE); + + return g_task_propagate_boolean (G_TASK (result), error); +} + +static void +gtk_drag_content_finalize (GObject *object) +{ + GtkDragContent *content = GTK_DRAG_CONTENT (object); + + g_clear_object (&content->widget); + g_clear_pointer (&content->formats, (GDestroyNotify) gdk_content_formats_unref); + + G_OBJECT_CLASS (gtk_drag_content_parent_class)->finalize (object); +} + +static void +gtk_drag_content_class_init (GtkDragContentClass *class) +{ + GdkContentProviderClass *provider_class = GDK_CONTENT_PROVIDER_CLASS (class); + GObjectClass *object_class = G_OBJECT_CLASS (class); + + object_class->finalize = gtk_drag_content_finalize; + + provider_class->ref_formats = gtk_drag_content_ref_formats; + provider_class->write_mime_type_async = gtk_drag_content_write_mime_type_async; + provider_class->write_mime_type_finish = gtk_drag_content_write_mime_type_finish; +} + +static void +gtk_drag_content_init (GtkDragContent *content) +{ +} + /* Like gtk_drag_begin(), but also takes a GtkIconHelper * so that we can set the icon from the source site information */ @@ -979,6 +1123,7 @@ gtk_drag_begin_internal (GtkWidget *widget, GdkWindow *ipc_window; int dx, dy; GdkAtom selection; + GtkDragContent *content; guint32 time; ipc_widget = gtk_drag_get_ipc_widget (widget); @@ -1001,13 +1146,22 @@ gtk_drag_begin_internal (GtkWidget *widget, dx -= x; dy -= y; - context = gdk_drag_begin (ipc_window, device, target_list, actions, dx, dy); + content = g_object_new (GTK_TYPE_DRAG_CONTENT, NULL); + content->widget = g_object_ref (widget); + content->formats = gdk_content_formats_ref (target_list); + content->time = time; + + context = gdk_drag_begin (ipc_window, device, GDK_CONTENT_PROVIDER (content), actions, dx, dy); if (context == NULL) { gtk_drag_release_ipc_widget (ipc_widget); + g_object_unref (content); return NULL; } + content->context = context; + g_object_unref (content); + info = gtk_drag_get_source_info (context, TRUE); info->ipc_widget = ipc_widget; |