[libwnck/wip/muktupavels/issue-154: 1/4] handle: init XRes extension

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 4ee0ab2b0665da5cb0ad16d6d163ad20549b7ba6
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Fri Sep 30 17:32:09 2022 +0300

    handle: init XRes extension
    
    XResQueryClientIds needs XRes 1.2 or newer.

 libwnck/wnck-handle-private.h |  2 ++
 libwnck/wnck-handle.c         | 48 +++++++++++++++++++++++++++++++++++++++++++
 meson.build                   |  2 +-
 3 files changed, 51 insertions(+), 1 deletion(-)
---
diff --git a/libwnck/wnck-handle-private.h b/libwnck/wnck-handle-private.h
index c4217cef..06331040 100644
--- a/libwnck/wnck-handle-private.h
+++ b/libwnck/wnck-handle-private.h
@@ -26,6 +26,8 @@ G_BEGIN_DECLS
 
 WnckClientType   _wnck_handle_get_client_type            (WnckHandle     *self);
 
+gboolean         _wnck_handle_has_xres                   (WnckHandle     *self);
+
 gsize            _wnck_handle_get_default_icon_size      (WnckHandle     *self);
 
 gsize            _wnck_handle_get_default_mini_icon_size (WnckHandle     *self);
diff --git a/libwnck/wnck-handle.c b/libwnck/wnck-handle.c
index e12ff882..710b7548 100644
--- a/libwnck/wnck-handle.c
+++ b/libwnck/wnck-handle.c
@@ -29,6 +29,11 @@
 #include "config.h"
 #include "wnck-handle-private.h"
 
+#include <X11/Xlib.h>
+#ifdef HAVE_XRES
+#include <X11/extensions/XRes.h>
+#endif
+
 #include "private.h"
 #include "screen.h"
 #include "window.h"
@@ -43,6 +48,8 @@ struct _WnckHandle
 
   WnckClientType   client_type;
 
+  gboolean         have_xres;
+
   gsize            default_icon_size;
   gsize            default_mini_icon_size;
 
@@ -164,6 +171,40 @@ filter_func (GdkXEvent *gdkxevent,
   return GDK_FILTER_CONTINUE;
 }
 
+static void
+init_xres (WnckHandle *self)
+{
+#ifdef HAVE_XRES
+  Display *xdisplay;
+  int event_base;
+  int error_base;
+  int major;
+  int minor;
+
+  xdisplay = _wnck_get_default_display ();
+  event_base = error_base = major = minor = 0;
+
+  if (XResQueryExtension (xdisplay, &event_base, &error_base) &&
+      XResQueryVersion (xdisplay, &major, &minor) == 1)
+    {
+      if (major > 1 || (major == 1 && minor >= 2))
+        self->have_xres = TRUE;
+    }
+#endif
+}
+
+static void
+wnck_handle_constructed (GObject *object)
+{
+  WnckHandle *self;
+
+  self = WNCK_HANDLE (object);
+
+  G_OBJECT_CLASS (wnck_handle_parent_class)->constructed (object);
+
+  init_xres (self);
+}
+
 static void
 wnck_handle_finalize (GObject *object)
 {
@@ -290,6 +331,7 @@ wnck_handle_class_init (WnckHandleClass *self_class)
 
   object_class = G_OBJECT_CLASS (self_class);
 
+  object_class->constructed = wnck_handle_constructed;
   object_class->finalize = wnck_handle_finalize;
   object_class->get_property = wnck_handle_get_property;
   object_class->set_property = wnck_handle_set_property;
@@ -343,6 +385,12 @@ _wnck_handle_get_client_type (WnckHandle *self)
   return self->client_type;
 }
 
+gboolean
+_wnck_handle_has_xres (WnckHandle *self)
+{
+  return self->have_xres;
+}
+
 /**
  * wnck_handle_get_default_screen:
  * @self: a #WnckHandle
diff --git a/meson.build b/meson.build
index 6b0eea97..907fdf26 100644
--- a/meson.build
+++ b/meson.build
@@ -45,7 +45,7 @@ pkg_deps = [
   {'name': 'gtk+-3.0', 'version': '>= 3.22.0' },
   {'name': STARTUP_NOTIFICATION_PACKAGE, 'version': '>= 0.4', 'required': 
get_option('startup_notification')},
   {'name': X11_PACKAGE },
-  {'name': XRES_PACKAGE, 'required': false},
+  {'name': XRES_PACKAGE, 'version': '>= 1.2', 'required': false},
 ]
 
 foreach p: pkg_deps