diff options
| -rw-r--r-- | gtk/gtk.symbols | 1 | ||||
| -rw-r--r-- | gtk/gtkprinter.c | 146 | ||||
| -rw-r--r-- | gtk/gtkprinter.h | 8 |
3 files changed, 155 insertions, 0 deletions
diff --git a/gtk/gtk.symbols b/gtk/gtk.symbols index 6591ac26d9..b10f4f6051 100644 --- a/gtk/gtk.symbols +++ b/gtk/gtk.symbols @@ -2601,6 +2601,7 @@ gtk_printer_is_virtual gtk_printer_accepts_pdf gtk_printer_accepts_ps gtk_printer_compare +gtk_enumerate_printers #endif #endif #endif diff --git a/gtk/gtkprinter.c b/gtk/gtkprinter.c index abf8a80f64..65f7e223bd 100644 --- a/gtk/gtkprinter.c +++ b/gtk/gtkprinter.c @@ -809,5 +809,151 @@ gtk_printer_compare (GtkPrinter *a, GtkPrinter *b) return g_ascii_strcasecmp (name_a, name_b); } + +typedef struct +{ + GList *backends; + GtkPrinterFunc func; + gpointer data; + GDestroyNotify destroy; + GMainLoop *loop; +} PrinterList; + +static void list_done_cb (GtkPrintBackend *backend, + PrinterList *printer_list); + +static void +stop_enumeration (PrinterList *printer_list) +{ + GList *list, *next; + GtkPrintBackend *backend; + + for (list = printer_list->backends; list; list = next) + { + next = list->next; + backend = GTK_PRINT_BACKEND (list->data); + list_done_cb (backend, printer_list); + } + + if (printer_list->destroy) + printer_list->destroy (printer_list->data); + + if (printer_list->loop) + { + g_main_loop_quit (printer_list->loop); + + g_main_loop_unref (printer_list->loop); + } + + g_free (printer_list); +} + +static void +list_added_cb (GtkPrintBackend *backend, + GtkPrinter *printer, + PrinterList *printer_list) +{ + if (printer_list->func (printer, printer_list->data)) + stop_enumeration (printer_list); +} + +static void +list_done_cb (GtkPrintBackend *backend, + PrinterList *printer_list) +{ + printer_list->backends = g_list_remove (printer_list->backends, backend); + + g_signal_handlers_disconnect_by_func (backend, list_added_cb, printer_list); + g_signal_handlers_disconnect_by_func (backend, list_done_cb, printer_list); + + gtk_print_backend_destroy (backend); + g_object_unref (backend); + + if (printer_list->backends == NULL) + stop_enumeration (printer_list); +} + +static void +list_printers_init (PrinterList *printer_list, + GtkPrintBackend *backend) +{ + GList *list; + GList *node; + + list = gtk_print_backend_get_printer_list (backend); + + for (node = list; node != NULL; node = node->next) + list_added_cb (backend, node->data, printer_list); + + g_list_free (list); + + if (gtk_print_backend_printer_list_is_done (backend)) + { + printer_list->backends = g_list_remove (printer_list->backends, backend); + gtk_print_backend_destroy (backend); + g_object_unref (backend); + } + else + { + g_signal_connect (backend, "printer-added", + (GCallback) list_added_cb, + printer_list); + g_signal_connect (backend, "printer-list-done", + (GCallback) list_done_cb, + printer_list); + } + +} + +/** + * gtk_enumerate_printers: + * @func: a function to call for each printer + * @data: user data to pass to @func + * @destroy: function to call if @data is no longer needed + * @wait: if %TRUE, wait in a recursive mainloop until + * all printers are enumerated; otherwise return early + * + * Calls a function for all #GtkPrinter<!-- -->s. If @func + * returns %TRUE, the enumeration is stopped. + * + * Since: 2.10 + */ +void +gtk_enumerate_printers (GtkPrinterFunc func, + gpointer data, + GDestroyNotify destroy, + gboolean wait) +{ + PrinterList *printer_list; + GList *printers, *node, *next; + GtkPrintBackend *backend; + + printer_list = g_new0 (PrinterList, 1); + + printer_list->func = func; + printer_list->data = data; + printer_list->destroy = destroy; + + if (g_module_supported ()) + printer_list->backends = gtk_print_backend_load_modules (); + + for (node = printer_list->backends; node != NULL; node = next) + { + next = node->next; + backend = GTK_PRINT_BACKEND (node->data); + list_printers_init (printer_list, backend); + } + + if (wait && printer_list->backends) + { + printer_list->loop = g_main_loop_new (NULL, FALSE); + + GDK_THREADS_LEAVE (); + g_main_loop_run (printer_list->loop); + GDK_THREADS_ENTER (); + } +} + + #define __GTK_PRINTER_C__ #include "gtkaliasdef.c" diff --git a/gtk/gtkprinter.h b/gtk/gtkprinter.h index c612107255..7454f0e424 100644 --- a/gtk/gtkprinter.h +++ b/gtk/gtkprinter.h @@ -83,6 +83,14 @@ gboolean gtk_printer_accepts_ps (GtkPrinter *printer gint gtk_printer_compare (GtkPrinter *a, GtkPrinter *b); +typedef gboolean (*GtkPrinterFunc) (GtkPrinter *printer, + gpointer data); + +void gtk_enumerate_printers (GtkPrinterFunc func, + gpointer data, + GDestroyNotify destroy, + gboolean wait); + G_END_DECLS #endif /* __GTK_PRINTER_H__ */ |