HTML: add event filtering diagnostic

1 files changed, 15 insertions, 0 deletions

diff --git a/content/handlers/html/box/manager.c b/content/handlers/html/box/manager.c
index 6c3049329..2878ef8ee 100644
--- a/content/handlers/html/box/manager.c
+++ b/content/handlers/html/box/manager.c
@@ -4,6 +4,7 @@
 #include "html/box/manager.h"
 #include "netsurf/misc.h"
 #include "utils/corestrings.h"
+#include "utils/log.h"
 
 struct box_manager
 {
@@ -46,6 +47,8 @@ box_manager_process_events(void *pw)
 	box_manager *mgr = pw;
 	dom_exception exc;
 	size_t i, j;
+	size_t orphaned_nodes = 0, duplicate_nodes = 0;
+	size_t descendant_nodes = 0, processed_events = 0;
 
 	mgr->callback_pending = false;
 
@@ -64,6 +67,7 @@ box_manager_process_events(void *pw)
 		if (exc == DOM_NO_ERR && contains == false) {
 			dom_node_unref(mgr->pending_queue[i-1]);
 			mgr->pending_queue[i-1] = NULL;
+			orphaned_nodes++;
 			continue;
 		}
 
@@ -77,6 +81,7 @@ box_manager_process_events(void *pw)
 					mgr->pending_queue[j-1]) {
 				dom_node_unref(mgr->pending_queue[i-1]);
 				mgr->pending_queue[i-1] = NULL;
+				duplicate_nodes++;
 				break;
 			}
 		}
@@ -101,6 +106,7 @@ box_manager_process_events(void *pw)
 			if (exc == DOM_NO_ERR && contains == true) {
 				dom_node_unref(mgr->pending_queue[i-1]);
 				mgr->pending_queue[i-1] = NULL;
+				descendant_nodes++;
 				break;
 			}
 		}
@@ -119,8 +125,17 @@ box_manager_process_events(void *pw)
 		/* We're done with this node */
 		dom_node_unref(mgr->pending_queue[i]);
 		mgr->pending_queue[i] = NULL;
+
+		processed_events++;
 	}
 
+	NSLOG(layout, DBG, "bm: received %zu raw events (%zu orphaned, "
+			"%zu duplicate, %zu descendant) => "
+			"processed %zu events",
+			mgr->pending_queue_idx, orphaned_nodes,
+			duplicate_nodes, descendant_nodes,
+			processed_events);
+
 	/* 5. All events processed. Clean up. */
 	mgr->pending_queue_idx = 0;
 }