backends/eis: Hook eis into the debug system

To be enabled with MUTTER_DEBUG=eis

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2628>

src/backends/meta-eis.c

@@ -27,6 +27,7 @@
 #include "backends/meta-eis.h"
 #include "backends/meta-eis-client.h"
 #include "clutter/clutter-mutter.h"
+#include "meta/util.h"
 
 typedef struct _MetaEventSource MetaEventSource;
 
@@ -214,6 +215,30 @@ static GSourceFuncs eis_event_funcs = {
   NULL
 };
 
+static void
+eis_logger (struct eis             *eis,
+            enum eis_log_priority   priority,
+            const char             *message,
+            struct eis_log_context *ctx)
+{
+  switch (priority)
+    {
+    case EIS_LOG_PRIORITY_DEBUG:
+      meta_topic (META_DEBUG_EIS, "%s", message);
+      break;
+    case EIS_LOG_PRIORITY_WARNING:
+      g_warning ("%s", message);
+      break;
+    case EIS_LOG_PRIORITY_ERROR:
+      g_error ("%s", message);
+      break;
+    case EIS_LOG_PRIORITY_INFO:
+    default:
+      g_info ("%s", message);
+      break;
+    }
+}
+
 static int
 try_and_find_free_eis_socket (MetaEis *meta_eis)
 {
@@ -254,6 +279,9 @@ meta_eis_new (MetaBackend *backend)
       return NULL;
     }
 
+  eis_log_set_handler (meta_eis->eis, eis_logger);
+  eis_log_set_priority (meta_eis->eis, EIS_LOG_PRIORITY_DEBUG);
+
   fd = eis_get_fd (meta_eis->eis);
   meta_eis->event_source = meta_event_source_new (meta_eis, fd, &eis_event_funcs);
 

src/core/util.c

@@ -68,6 +68,7 @@ static const GDebugKey meta_debug_keys[] = {
   { "render", META_DEBUG_RENDER },
   { "color", META_DEBUG_COLOR },
   { "input-events", META_DEBUG_INPUT_EVENTS },
+  { "eis", META_DEBUG_EIS },
 };
 
 static gint verbose_topics = 0;
@@ -323,6 +324,8 @@ meta_topic_to_string (MetaDebugTopic topic)
       return "VERBOSE";
     case META_DEBUG_INPUT_EVENTS:
       return "INPUT_EVENTS";
+    case META_DEBUG_EIS:
+      return "EIS";
     }
 
   return "WM";

src/meta/util.h

@@ -76,6 +76,7 @@ void meta_fatal      (const char *format,
  * @META_DEBUG_RENDER: native backend rendering
  * @META_DEBUG_COLOR: color management
  * @META_DEBUG_INPUT_EVENTS: input events
+ * @META_DEBUG_EIS: eis state
  */
 typedef enum
 {
@@ -108,6 +109,7 @@ typedef enum
   META_DEBUG_RENDER          = 1 << 25,
   META_DEBUG_COLOR           = 1 << 26,
   META_DEBUG_INPUT_EVENTS    = 1 << 27,
+  META_DEBUG_EIS             = 1 << 28,
 } MetaDebugTopic;
 
 /**