added get_media_size() function to retrieve media dimensions for a given "media" option value

Author: TinyTrebuchet

demo/print_frontend.c

@@ -270,6 +270,17 @@ gpointer parse_commands(gpointer user_data)
             PrinterObj *p = find_PrinterObj(f, printer_id, backend_name);
             printf("%s\n", get_human_readable_choice_name(p, option_name, choice_name));
         }
+        else if (strcmp(buf, "get-media-size") == 0)
+        {
+            char printer_id[100];
+            char backend_name[100];
+            char media[100];
+            int width, length;
+            scanf("%s%s%s", media, printer_id, backend_name);
+            PrinterObj *p = find_PrinterObj(f, printer_id, backend_name);
+            get_media_size(p, media, &width, &length);
+            printf("%dx%d\n", width, length);
+        }
     }
 }
 
@@ -299,6 +310,7 @@ void display_help()
     printf("%s\n", "clear-setting <option name> <printer id> <backend name>");
     printf("%s\n", "get-human-readable-option-name <printer id> <backend name> <option name>");
     printf("%s\n", "get-human-readable-choice-name <printer id> <backend name> <option name> <choice name>");
+    printf("%s\n", "get-media-size <media> <printer id> <backend name>");
 
     printf("pickle-printer <printer id> <backend name>\n");
 }

lib/frontend_helper.c

@@ -640,6 +640,15 @@ char *get_human_readable_choice_name(PrinterObj *p, char *option_name, char* cho
     }
 }
 
+void get_media_size(PrinterObj *p, const char *media_size, int *width, int *length)
+{
+    GError *error = NULL;
+    GVariant *var;
+    print_backend_call_get_media_size_sync(p->backend_proxy, media_size,
+                                            &var, NULL, &error);
+    g_variant_get(var, "(ii)", width, length);
+}
+
 /**
 ________________________________________________ Settings __________________________________________
 **/

lib/frontend_helper.h

@@ -340,6 +340,15 @@ char *get_human_readable_option_name(PrinterObj *p, char *option_name);
  */
 char *get_human_readable_choice_name(PrinterObj *p, char *option_name, char *choice_name);
 
+/**
+ * Finds the dimension for a given media-size
+ *
+ * @param media : name of media-size
+ * @param width : address of width of media-size to be returned
+ * @param length : address of length of media-size to be returned
+ */
+void get_media_size(PrinterObj *p, const char *media, int *width, int *length);
+
 /************************************************************************************************/
 /**
 ______________________________________ Settings __________________________________________

lib/interface/org.openprinting.Backend.xml

@@ -34,6 +34,11 @@
             <arg name="choice_name" direction="in" type="s"/>
             <arg name="human_readable_name" direction="out" type="s"/>
         </method>
+        <method name="getMediaSize">
+            <arg name="media" direction="in" type="s"/>
+            <arg name="dimensions" direction="out" type="(ii)"/>
+            <!-- dimension contents: width, length -->
+        </method>
         <method name="isAcceptingJobs">
             <arg name="printer_id" direction="in" type="s"/>
             <arg name="is_accepting" direction="out" type="b"/>