css: Introduce dependencies for value computations

When values are computed, they might depend on various other values and
we need to track this so we can update the values when those other
values change. This is the first step in making that happen.

This patch does not do any dependency tracking at all, instead it uses
GTK_CSS_DEPENDS_ON_EVERYTHING as a sort of FIXME.

1 files changed, 8 insertions, 4 deletions

diff --git a/gtk/gtkcssinheritvalue.c b/gtk/gtkcssinheritvalue.c
index 6faeef3c84..58964be240 100644
--- a/gtk/gtkcssinheritvalue.c
+++ b/gtk/gtkcssinheritvalue.c
@@ -34,18 +34,22 @@ gtk_css_value_inherit_free (GtkCssValue *value)
 }
 
 static GtkCssValue *
-gtk_css_value_inherit_compute (GtkCssValue     *value,
-                               guint            property_id,
-                               GtkStyleContext *context)
+gtk_css_value_inherit_compute (GtkCssValue        *value,
+                               guint               property_id,
+                               GtkStyleContext    *context,
+                               GtkCssDependencies *dependencies)
 {
   GtkStyleContext *parent = gtk_style_context_get_parent (context);
 
+  *dependencies = GTK_CSS_DEPENDS_ON_EVERYTHING;
+
   if (parent)
     return _gtk_css_value_ref (_gtk_style_context_peek_property (parent, property_id));
   else
     return _gtk_css_value_compute (_gtk_css_style_property_get_initial_value (_gtk_css_style_property_lookup_by_id (property_id)),
                                    property_id,
-                                   context);
+                                   context,
+                                   NULL);
 }
 
 static gboolean