css: Introduce _gtk_css_value_compute()

This commit is essentially a large reorganization. Instead of all value
subtypes having their own compute function, there is the general
_gtk_css_value_compute() function that then calls a vfunc on the
subtype.

1 files changed, 12 insertions, 13 deletions

diff --git a/gtk/gtkcssbgsizevalue.c b/gtk/gtkcssbgsizevalue.c
index 24e0fae039..2ba0eb110a 100644
--- a/gtk/gtkcssbgsizevalue.c
+++ b/gtk/gtkcssbgsizevalue.c
@@ -40,6 +40,17 @@ gtk_css_value_bg_size_free (GtkCssValue *value)
   g_slice_free (GtkCssValue, value);
 }
 
+GtkCssValue *
+gtk_css_value_bg_size_compute (GtkCssValue     *value,
+                               GtkStyleContext *context)
+{
+  if (value->x == NULL && value->y == NULL)
+    return _gtk_css_value_ref (value);
+
+  return _gtk_css_bg_size_value_new (value->x ? _gtk_css_value_compute (value->x, context) : NULL,
+                                     value->y ? _gtk_css_value_compute (value->y, context) : NULL);
+}
+
 static gboolean
 gtk_css_value_bg_size_equal (const GtkCssValue *value1,
                              const GtkCssValue *value2)
@@ -119,6 +130,7 @@ gtk_css_value_bg_size_print (const GtkCssValue *value,
 
 static const GtkCssValueClass GTK_CSS_VALUE_BG_SIZE = {
   gtk_css_value_bg_size_free,
+  gtk_css_value_bg_size_compute,
   gtk_css_value_bg_size_equal,
   gtk_css_value_bg_size_transition,
   gtk_css_value_bg_size_print
@@ -243,16 +255,3 @@ _gtk_css_bg_size_value_compute_size (const GtkCssValue *value,
                                       out_width, out_height);
 }
 
-GtkCssValue *
-_gtk_css_bg_size_value_compute (GtkCssValue     *value,
-                                GtkStyleContext *context)
-{
-  g_return_val_if_fail (value->class == &GTK_CSS_VALUE_BG_SIZE, NULL);
-
-  if (value->x == NULL && value->y == NULL)
-    return _gtk_css_value_ref (value);
-
-  return _gtk_css_bg_size_value_new (value->x ? _gtk_css_number_value_compute (value->x, context) : NULL,
-                                     value->y ? _gtk_css_number_value_compute (value->y, context) : NULL);
-}
-