Introduce start_document_refreshes

start_document_refreshes performs the NULL-pointer checks that previously all callers to start_document_refresh must perform and then calls start_document_refresh.

src/document/refresh.c

@@ -94,7 +94,7 @@ do_document_refresh(void *data)
 	}
 }
 
-void
+static void
 start_document_refresh(struct document_refresh *refresh, struct session *ses)
 {
 	milliseconds_T minimum = (milliseconds_T) get_opt_int("document.browse.minimum_refresh_time", ses);
@@ -120,3 +120,18 @@ start_document_refresh(struct document_refresh *refresh, struct session *ses)
 
 	install_timer(&refresh->timer, time, do_document_refresh, ses);
 }
+
+void
+start_document_refreshes(struct session *ses)
+{
+
+	assert(ses);
+
+	if (!ses->doc_view
+	    || !ses->doc_view->document
+	    || !ses->doc_view->document->refresh
+	    || !get_opt_bool("document.browse.refresh", ses))
+		return;
+
+	start_document_refresh(ses->doc_view->document->refresh, ses);
+}

src/document/refresh.h

@@ -16,6 +16,6 @@ struct document_refresh {
 struct document_refresh *init_document_refresh(unsigned char *url, unsigned long seconds);
 void done_document_refresh(struct document_refresh *refresh);
 void kill_document_refresh(struct document_refresh *refresh);
-void start_document_refresh(struct document_refresh *refresh, struct session *ses);
+void start_document_refreshes(struct session *ses);
 
 #endif

src/session/session.c

@@ -588,13 +588,7 @@ doc_loading_callback(struct download *download, struct session *ses)
 		load_ecmascript_imports(ses, ses->doc_view);
 		process_file_requests(ses);
 
-		if (ses->doc_view
-		    && ses->doc_view->document
-		    && ses->doc_view->document->refresh
-		    && get_opt_bool("document.browse.refresh", ses)) {
-			start_document_refresh(ses->doc_view->document->refresh,
-					       ses);
-		}
+		start_document_refreshes(ses);
 
 		if (download->state != S_OK) {
 			print_error_dialog(ses, download->state,

src/viewer/text/draw.c

@@ -351,13 +351,7 @@ draw_formatted(struct session *ses, int rerender)
 		render_document_frames(ses, rerender);
 
 		/* Rerendering kills the document refreshing so restart it. */
-		if (ses->doc_view
-		    && ses->doc_view->document
-		    && ses->doc_view->document->refresh
-		    && get_opt_bool("document.browse.refresh", ses)) {
-			start_document_refresh(ses->doc_view->document->refresh,
-					       ses);
-		}
+		start_document_refreshes(ses);
 	}
 
 	if (ses->tab != get_current_tab(ses->tab->term))