[gtk+/xi2: 1081/1239] GdkDevice: Add select_window_events() vmethod.

[Carlos Garnacho <carlosg src gnome org>]

commit 536875ee0e41325269c8b6917c121c43e516341f
Author: Carlos Garnacho <carlos gnome org>
Date:   Sun Sep 6 21:52:13 2009 +0200

    GdkDevice: Add select_window_events() vmethod.
    
    This is now implemented in X11 core and XI2 code.

 gdk/gdkdeviceprivate.h   |    3 ++
 gdk/x11/gdkdevice-core.c |   54 ++++++++++++++++++++++++++++++++++++++++++++++
 gdk/x11/gdkdevice-xi2.c  |   24 ++++++++++++++++++++
 3 files changed, 81 insertions(+), 0 deletions(-)
---
diff --git a/gdk/gdkdeviceprivate.h b/gdk/gdkdeviceprivate.h
index 7511688..4373f08 100644
--- a/gdk/gdkdeviceprivate.h
+++ b/gdk/gdkdeviceprivate.h
@@ -82,6 +82,9 @@ struct _GdkDeviceClass
                                       gint            *win_x,
                                       gint            *win_y,
                                       GdkModifierType *mask);
+  void (* select_window_events)      (GdkDevice       *device,
+                                      GdkWindow       *window,
+                                      GdkEventMask     event_mask);
 };
 
 void  _gdk_device_set_relative (GdkDevice *device,
diff --git a/gdk/x11/gdkdevice-core.c b/gdk/x11/gdkdevice-core.c
index ff4fb33..72840fb 100644
--- a/gdk/x11/gdkdevice-core.c
+++ b/gdk/x11/gdkdevice-core.c
@@ -55,6 +55,9 @@ static GdkWindow * gdk_device_core_window_at_position (GdkDevice       *device,
                                                        gint            *win_x,
                                                        gint            *win_y,
                                                        GdkModifierType *mask);
+static void      gdk_device_core_select_window_events (GdkDevice       *device,
+                                                       GdkWindow       *window,
+                                                       GdkEventMask     event_mask);
 
 
 G_DEFINE_TYPE (GdkDeviceCore, gdk_device_core, GDK_TYPE_DEVICE)
@@ -76,6 +79,7 @@ gdk_device_core_class_init (GdkDeviceCoreClass *klass)
   device_class->grab = gdk_device_core_grab;
   device_class->ungrab = gdk_device_core_ungrab;
   device_class->window_at_position = gdk_device_core_window_at_position;
+  device_class->select_window_events = gdk_device_core_select_window_events;
 }
 
 static void
@@ -352,3 +356,53 @@ gdk_device_core_window_at_position (GdkDevice       *device,
 
   return window;
 }
+
+static void
+gdk_device_core_select_window_events (GdkDevice    *device,
+                                      GdkWindow    *window,
+                                      GdkEventMask  event_mask)
+{
+  GdkEventMask filter_mask, window_mask;
+  guint xmask = 0;
+  gint i;
+
+  window_mask = gdk_window_get_events (window);
+  filter_mask = (GDK_POINTER_MOTION_MASK &
+                 GDK_POINTER_MOTION_HINT_MASK &
+                 GDK_BUTTON_MOTION_MASK &
+                 GDK_BUTTON1_MOTION_MASK &
+                 GDK_BUTTON2_MOTION_MASK &
+                 GDK_BUTTON3_MOTION_MASK &
+                 GDK_BUTTON_PRESS_MASK &
+                 GDK_BUTTON_RELEASE_MASK &
+                 GDK_KEY_PRESS_MASK &
+                 GDK_KEY_RELEASE_MASK &
+                 GDK_ENTER_NOTIFY_MASK &
+                 GDK_LEAVE_NOTIFY_MASK &
+                 GDK_FOCUS_CHANGE_MASK &
+                 GDK_PROXIMITY_IN_MASK &
+                 GDK_PROXIMITY_OUT_MASK &
+                 GDK_SCROLL_MASK);
+
+  /* Filter out non-device events */
+  event_mask &= filter_mask;
+
+  /* Unset device events on window mask */
+  window_mask &= ~(filter_mask);
+
+  /* Combine masks */
+  event_mask |= window_mask;
+
+  for (i = 0; i < _gdk_nenvent_masks; i++)
+    {
+      if (event_mask & (1 << (i + 1)))
+        xmask |= _gdk_event_mask_table[i];
+    }
+
+  if (GDK_WINDOW_XID (window) != GDK_WINDOW_XROOTWIN (window))
+    xmask |= StructureNotifyMask | PropertyChangeMask;
+
+  XSelectInput (GDK_WINDOW_XDISPLAY (window),
+                GDK_WINDOW_XWINDOW (window),
+                xmask);
+}
diff --git a/gdk/x11/gdkdevice-xi2.c b/gdk/x11/gdkdevice-xi2.c
index f4b1a34..7bc1c68 100644
--- a/gdk/x11/gdkdevice-xi2.c
+++ b/gdk/x11/gdkdevice-xi2.c
@@ -76,6 +76,9 @@ static GdkWindow * gdk_device_xi2_window_at_position (GdkDevice       *device,
                                                       gint            *win_x,
                                                       gint            *win_y,
                                                       GdkModifierType *mask);
+static void  gdk_device_xi2_select_window_events (GdkDevice    *device,
+                                                  GdkWindow    *window,
+                                                  GdkEventMask  event_mask);
 
 
 G_DEFINE_TYPE (GdkDeviceXI2, gdk_device_xi2, GDK_TYPE_DEVICE)
@@ -101,6 +104,7 @@ gdk_device_xi2_class_init (GdkDeviceXI2Class *klass)
   device_class->grab = gdk_device_xi2_grab;
   device_class->ungrab = gdk_device_xi2_ungrab;
   device_class->window_at_position = gdk_device_xi2_window_at_position;
+  device_class->select_window_events = gdk_device_xi2_select_window_events;
 
   g_object_class_install_property (object_class,
 				   PROP_DEVICE_ID,
@@ -416,6 +420,26 @@ gdk_device_xi2_window_at_position (GdkDevice       *device,
   return window;
 }
 
+static void
+gdk_device_xi2_select_window_events (GdkDevice    *device,
+                                     GdkWindow    *window,
+                                     GdkEventMask  event_mask)
+{
+  GdkDeviceXI2Private *priv;
+  XIEventMask evmask;
+
+  priv = GDK_DEVICE_XI2_GET_PRIVATE (device);
+
+  evmask.deviceid = priv->device_id;
+  evmask.mask = gdk_device_xi2_translate_event_mask (event_mask, &evmask.mask_len);
+
+  XISelectEvents (GDK_WINDOW_XDISPLAY (window),
+                  GDK_WINDOW_XWINDOW (window),
+                  &evmask, 1);
+
+  g_free (evmask.mask);
+}
+
 guchar *
 gdk_device_xi2_translate_event_mask (GdkEventMask  event_mask,
                                      int          *len)