[gtk/wip/matthiasc/css-values] Speed up gtk_widget_pick

[Matthias Clasen <matthiasc src gnome org>]

commit a680eeba1715778836ed5e435e418b16217c4fb4
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Jan 12 19:36:53 2020 -0500

    Speed up gtk_widget_pick
    
    Add early exits, and avoid as much work as
    possible.

 gtk/gtkwidget.c | 47 +++++++++++++++++++++++++----------------------
 1 file changed, 25 insertions(+), 22 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 76de31262a..6addb83171 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -10507,8 +10507,7 @@ gtk_widget_pick (GtkWidget    *widget,
 {
   GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
   GtkWidget *child;
-
-  g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
+  GtkCssBoxes boxes;
 
   if (!_gtk_widget_is_drawable (widget))
     return NULL;
@@ -10521,30 +10520,26 @@ gtk_widget_pick (GtkWidget    *widget,
       !_gtk_widget_is_sensitive (widget))
     return NULL;
 
-  switch (priv->overflow)
-    {
-    default:
-    case GTK_OVERFLOW_VISIBLE:
-      break;
-
-    case GTK_OVERFLOW_HIDDEN:
-      {
-        GtkCssBoxes boxes;
-
-        gtk_css_boxes_init (&boxes, widget);
+  gtk_css_boxes_init (&boxes, widget);
 
-        if (!gsk_rounded_rect_contains_point (gtk_css_boxes_get_padding_box (&boxes),
-                                              &GRAPHENE_POINT_INIT (x, y)))
-          return NULL;
-      }
-      break;
+  if (priv->overflow == GTK_OVERFLOW_HIDDEN)
+    {
+      if (!gsk_rounded_rect_contains_point (gtk_css_boxes_get_padding_box (&boxes),
+                                            &GRAPHENE_POINT_INIT (x, y)))
+        return NULL;
+    }
+  else
+    {
+      if (!gsk_rounded_rect_contains_point (gtk_css_boxes_get_border_box (&boxes),
+                                            &GRAPHENE_POINT_INIT (x, y)))
+        return NULL;
     }
 
   if (GTK_IS_WINDOW (widget))
     {
       GtkWidget *picked;
 
-      picked = gtk_window_pick_popover (GTK_WINDOW (widget), x, y, flags);
+      picked = gtk_window_pick_popover ((GtkWindow *)widget, x, y, flags);
       if (picked)
         return picked;
     }
@@ -10559,6 +10554,17 @@ gtk_widget_pick (GtkWidget    *widget,
       GtkWidget *picked;
       graphene_point3d_t p0, p1, res;
 
+      if (!_gtk_widget_is_drawable (child))
+        continue;
+
+      if (!(flags & GTK_PICK_NON_TARGETABLE) &&
+          !gtk_widget_get_can_target (child))
+        continue;
+
+      if (!(flags & GTK_PICK_INSENSITIVE) &&
+          !_gtk_widget_is_sensitive (child))
+        continue;
+
       if (GTK_IS_NATIVE (child))
         continue;
 
@@ -10588,9 +10594,6 @@ gtk_widget_pick (GtkWidget    *widget,
         return picked;
     }
 
-  if (!gtk_widget_contains (widget, x, y))
-    return NULL;
-
   return widget;
 }