backend/x11: add support for setting randr 1.5 monitorstile-monitor-5

This interface allows us to propogate back the constructed
monitors to randr using the randr 1.5 protocol. Apps
should pick it up from there.

3 files changed, 120 insertions, 1 deletions

diff --git a/src/backends/meta-monitor-manager-private.h b/src/backends/meta-monitor-manager-private.h
index c5444d62..d21888ed 100644
--- a/src/backends/meta-monitor-manager-private.h
+++ b/src/backends/meta-monitor-manager-private.h
@@ -349,6 +349,13 @@ struct _MetaMonitorManagerClass
                           unsigned short     *,
                           unsigned short     *,
                           unsigned short     *);
+
+  void (*add_monitor) (MetaMonitorManager *,
+                       MetaMonitorInfo *);
+
+  void (*delete_monitor) (MetaMonitorManager *,
+                          int monitor_winsys_xid);
+
 };
 
 void                meta_monitor_manager_rebuild_derived   (MetaMonitorManager *manager);
diff --git a/src/backends/meta-monitor-manager.c b/src/backends/meta-monitor-manager.c
index 2588d22a..66f38a56 100644
--- a/src/backends/meta-monitor-manager.c
+++ b/src/backends/meta-monitor-manager.c
@@ -173,6 +173,7 @@ construct_tile_monitor (MetaMonitorManager *manager,
 static void
 make_logical_config (MetaMonitorManager *manager)
 {
+  MetaMonitorManagerClass *manager_class = META_MONITOR_MANAGER_GET_CLASS (manager);
   GArray *monitor_infos;
   unsigned int i, j;
 
@@ -277,6 +278,10 @@ make_logical_config (MetaMonitorManager *manager)
 
   manager->n_monitor_infos = monitor_infos->len;
   manager->monitor_infos = (void*)g_array_free (monitor_infos, FALSE);
+
+  if (manager_class->add_monitor)
+    for (i = 0; i < manager->n_monitor_infos; i++)
+      manager_class->add_monitor (manager, &manager->monitor_infos[i]);
 }
 
 static void
@@ -1364,15 +1369,35 @@ meta_monitor_manager_read_current_config (MetaMonitorManager *manager)
 void
 meta_monitor_manager_rebuild_derived (MetaMonitorManager *manager)
 {
+  MetaMonitorManagerClass *manager_class = META_MONITOR_MANAGER_GET_CLASS (manager);
   MetaMonitorInfo *old_monitor_infos;
-
+  unsigned old_n_monitor_infos;
+  unsigned i, j;
   old_monitor_infos = manager->monitor_infos;
+  old_n_monitor_infos = manager->n_monitor_infos;
 
   if (manager->in_init)
     return;
 
   make_logical_config (manager);
 
+  if (manager_class->delete_monitor)
+    {
+      for (i = 0; i < old_n_monitor_infos; i++)
+        {
+          gboolean delete_mon = TRUE;
+          for (j = 0; j < manager->n_monitor_infos; j++)
+            {
+              if (manager->monitor_infos[j].monitor_winsys_xid == old_monitor_infos[i].monitor_winsys_xid)
+                {
+                  delete_mon = FALSE;
+                  break;
+                }
+            }
+          if (delete_mon)
+            manager_class->delete_monitor (manager, old_monitor_infos[i].monitor_winsys_xid);
+        }
+    }
   g_signal_emit_by_name (manager, "monitors-changed");
 
   g_free (old_monitor_infos);
diff --git a/src/backends/x11/meta-monitor-manager-xrandr.c b/src/backends/x11/meta-monitor-manager-xrandr.c
index 1aa6bdf4..55f339cc 100644
--- a/src/backends/x11/meta-monitor-manager-xrandr.c
+++ b/src/backends/x11/meta-monitor-manager-xrandr.c
@@ -1277,6 +1277,88 @@ meta_monitor_manager_xrandr_set_crtc_gamma (MetaMonitorManager *manager,
   XRRFreeGamma (gamma);
 }
 
+#ifdef HAVE_XRANDR15
+static void
+meta_monitor_manager_xrandr_add_monitor(MetaMonitorManager *manager,
+                                        MetaMonitorInfo *monitor)
+{
+  MetaMonitorManagerXrandr *manager_xrandr = META_MONITOR_MANAGER_XRANDR (manager);
+  XRRMonitorInfo *m;
+  int o;
+  Atom name;
+  char name_buf[40];
+
+  if (manager_xrandr->has_randr15 == FALSE)
+    return;
+
+  if (monitor->n_outputs <= 1)
+    return;
+
+  if (monitor->outputs[0]->product)
+    snprintf (name_buf, 40, "%s-%d", monitor->outputs[0]->product, monitor->outputs[0]->tile_info.group_id);
+  else
+    snprintf (name_buf, 40, "Tiled-%d", monitor->outputs[0]->tile_info.group_id);
+
+  name = XInternAtom (manager_xrandr->xdisplay, name_buf, False);
+  monitor->monitor_winsys_xid = name;
+  m = XRRAllocateMonitor (manager_xrandr->xdisplay, monitor->n_outputs);
+  if (!m)
+    return;
+  m->name = name;
+  m->primary = monitor->is_primary;
+  m->automatic = True;
+
+  for (o = 0; o < monitor->n_outputs; o++) {
+    MetaOutput *output = monitor->outputs[o];
+    m->outputs[o] = output->winsys_id;
+  }
+  XRRSetMonitor (manager_xrandr->xdisplay,
+                 DefaultRootWindow (manager_xrandr->xdisplay),
+                 m);
+  XRRFreeMonitors (m);
+}
+
+static void
+meta_monitor_manager_xrandr_delete_monitor(MetaMonitorManager *manager,
+                                           int monitor_winsys_xid)
+{
+  MetaMonitorManagerXrandr *manager_xrandr = META_MONITOR_MANAGER_XRANDR (manager);
+
+  if (manager_xrandr->has_randr15 == FALSE)
+    return;
+  XRRDeleteMonitor (manager_xrandr->xdisplay,
+                    DefaultRootWindow (manager_xrandr->xdisplay),
+                    monitor_winsys_xid);
+}
+
+static void
+meta_monitor_manager_xrandr_init_monitors(MetaMonitorManagerXrandr *manager_xrandr)
+{
+  XRRMonitorInfo *m;
+  int n, i;
+
+  if (manager_xrandr->has_randr15 == FALSE)
+    return;
+
+  /* delete any tiled monitors setup, as mutter will want to recreate
+     things in its image */
+  m = XRRGetMonitors (manager_xrandr->xdisplay,
+                      DefaultRootWindow (manager_xrandr->xdisplay),
+                      FALSE, &n);
+  if (n == -1)
+    return;
+
+  for (i = 0; i < n; i++)
+    {
+      if (m[i].noutput > 1)
+        XRRDeleteMonitor (manager_xrandr->xdisplay,
+                          DefaultRootWindow (manager_xrandr->xdisplay),
+                          m[i].name);
+    }
+  XRRFreeMonitors (m);
+}
+#endif
+
 static void
 meta_monitor_manager_xrandr_init (MetaMonitorManagerXrandr *manager_xrandr)
 {
@@ -1309,6 +1391,7 @@ meta_monitor_manager_xrandr_init (MetaMonitorManagerXrandr *manager_xrandr)
           (major_version == 1 &&
            minor_version >= 5))
         manager_xrandr->has_randr15 = TRUE;
+      meta_monitor_manager_xrandr_init_monitors (manager_xrandr);
 #endif
     }
 }
@@ -1340,6 +1423,10 @@ meta_monitor_manager_xrandr_class_init (MetaMonitorManagerXrandrClass *klass)
   manager_class->change_backlight = meta_monitor_manager_xrandr_change_backlight;
   manager_class->get_crtc_gamma = meta_monitor_manager_xrandr_get_crtc_gamma;
   manager_class->set_crtc_gamma = meta_monitor_manager_xrandr_set_crtc_gamma;
+#ifdef HAVE_XRANDR15
+  manager_class->add_monitor = meta_monitor_manager_xrandr_add_monitor;
+  manager_class->delete_monitor = meta_monitor_manager_xrandr_delete_monitor;
+#endif
 }
 
 gboolean