[gtk+] range: use new GtkCssGadget API instead of rolling our own

[Cosimo Cecchi <cosimoc src gnome org>]

commit 6ecab5ee6b311348be8dea43c71d5c87aa332d98
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Wed Feb 24 14:29:52 2016 -0800

    range: use new GtkCssGadget API instead of rolling our own

 gtk/gtkrange.c |   44 ++++++++++----------------------------------
 1 files changed, 10 insertions(+), 34 deletions(-)
---
diff --git a/gtk/gtkrange.c b/gtk/gtkrange.c
index 2b482c4..6856fa6 100644
--- a/gtk/gtkrange.c
+++ b/gtk/gtkrange.c
@@ -1211,30 +1211,6 @@ gtk_range_get_min_slider_size (GtkRange *range)
   return range->priv->min_slider_size;
 }
 
-/* Returns the gadget rect in widget coordinates */
-static void
-measure_one_gadget_alloc (GtkRange      *range,
-                          GtkCssGadget  *gadget,
-                          gboolean       use_content,
-                          GtkAllocation *allocation_out)
-{
-  GtkAllocation widget_alloc;
-
-  g_assert (allocation_out != NULL);
-
-  gtk_widget_get_allocation (GTK_WIDGET (range), &widget_alloc);
-
-  if (use_content)
-    gtk_css_gadget_get_content_allocation (gadget,
-                                           allocation_out, NULL);
-  else
-    gtk_css_gadget_get_margin_allocation (gadget,
-                                          allocation_out, NULL);
-
-  allocation_out->x -= widget_alloc.x;
-  allocation_out->y -= widget_alloc.y;
-}
-
 static void
 measure_one_gadget (GtkCssGadget *gadget,
                     int          *width_out,
@@ -1273,7 +1249,7 @@ gtk_range_get_range_rect (GtkRange     *range,
 
   priv = range->priv;
 
-  measure_one_gadget_alloc (range, priv->contents_gadget, FALSE, range_rect);
+  gtk_css_gadget_get_margin_box (priv->contents_gadget, range_rect);
 }
 
 /**
@@ -1303,7 +1279,7 @@ gtk_range_get_slider_range (GtkRange *range,
 
   priv = range->priv;
 
-  measure_one_gadget_alloc (range, priv->slider_gadget, FALSE, &slider_alloc);
+  gtk_css_gadget_get_margin_box (priv->slider_gadget, &slider_alloc);
 
   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
     {
@@ -2493,8 +2469,8 @@ coord_to_value (GtkRange *range,
   gint    slider_length;
   GtkAllocation slider_alloc, trough_alloc;
 
-  measure_one_gadget_alloc (range, priv->slider_gadget, FALSE, &slider_alloc);
-  measure_one_gadget_alloc (range, priv->trough_gadget, TRUE, &trough_alloc);
+  gtk_css_gadget_get_margin_box (priv->slider_gadget, &slider_alloc);
+  gtk_css_gadget_get_content_box (priv->trough_gadget, &trough_alloc);
 
   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
     {
@@ -2536,7 +2512,7 @@ gtk_range_key_press (GtkWidget   *widget,
   device = gdk_event_get_device ((GdkEvent *) event);
   device = gdk_device_get_associated_device (device);
 
-  measure_one_gadget_alloc (range, priv->slider_gadget, FALSE, &slider_alloc);
+  gtk_css_gadget_get_margin_box (priv->slider_gadget, &slider_alloc);
 
   if (gtk_gesture_is_active (priv->drag_gesture) &&
       device == gtk_gesture_get_device (priv->drag_gesture) &&
@@ -2573,7 +2549,7 @@ gtk_range_long_press_gesture_pressed (GtkGestureLongPress *gesture,
   GtkAllocation slider_alloc;
 
   gtk_range_update_mouse_location (range);
-  measure_one_gadget_alloc (range, priv->slider_gadget, FALSE, &slider_alloc);
+  gtk_css_gadget_get_margin_box (priv->slider_gadget, &slider_alloc);
 
   if (priv->mouse_location == MOUSE_SLIDER && !priv->zoom)
     {
@@ -2627,7 +2603,7 @@ gtk_range_multipress_gesture_pressed (GtkGestureMultiPress *gesture,
   priv->mouse_y = y;
 
   gtk_range_update_mouse_location (range);
-  measure_one_gadget_alloc (range, priv->slider_gadget, FALSE, &slider_alloc);
+  gtk_css_gadget_get_margin_box (priv->slider_gadget, &slider_alloc);
 
   g_object_get (gtk_widget_get_settings (widget),
                 "gtk-primary-button-warps-slider", &primary_warps,
@@ -2804,8 +2780,8 @@ update_slider_position (GtkRange *range,
   gint i;
   GtkAllocation slider_alloc, trough_alloc;
 
-  measure_one_gadget_alloc (range, priv->slider_gadget, FALSE, &slider_alloc);
-  measure_one_gadget_alloc (range, priv->trough_gadget, FALSE, &trough_alloc);
+  gtk_css_gadget_get_margin_box (priv->slider_gadget, &slider_alloc);
+  gtk_css_gadget_get_margin_box (priv->trough_gadget, &trough_alloc);
 
   if (priv->zoom)
     {
@@ -3452,7 +3428,7 @@ gtk_range_compute_slider_position (GtkRange     *range,
   int slider_width, slider_height;
 
   measure_one_gadget (priv->slider_gadget, &slider_width, &slider_height);
-  measure_one_gadget_alloc (range, priv->trough_gadget, TRUE, &trough_content_alloc);
+  gtk_css_gadget_get_content_box (priv->trough_gadget, &trough_content_alloc);
 
   if (priv->orientation == GTK_ORIENTATION_VERTICAL)
     {