css: Add initial support for calc()

So far, calc() only supports literals, ie it's completely useless.

1 files changed, 6 insertions, 1 deletions

diff --git a/gtk/gtkcssnumbervalue.c b/gtk/gtkcssnumbervalue.c
index 05643d7364..12508db130 100644
--- a/gtk/gtkcssnumbervalue.c
+++ b/gtk/gtkcssnumbervalue.c
@@ -19,6 +19,7 @@
 
 #include "gtkcssnumbervalueprivate.h"
 
+#include "gtkcsscalcvalueprivate.h"
 #include "gtkcssdimensionvalueprivate.h"
 
 struct _GtkCssValue {
@@ -51,13 +52,17 @@ _gtk_css_number_value_new (double     value,
 gboolean
 gtk_css_number_value_can_parse (GtkCssParser *parser)
 {
-  return _gtk_css_parser_has_number (parser);
+  return _gtk_css_parser_has_number (parser)
+      || _gtk_css_parser_has_prefix (parser, "calc");
 }
 
 GtkCssValue *
 _gtk_css_number_value_parse (GtkCssParser           *parser,
                              GtkCssNumberParseFlags  flags)
 {
+  if (_gtk_css_parser_has_prefix (parser, "calc"))
+    return gtk_css_calc_value_parse (parser, flags);
+
   return gtk_css_dimension_value_parse (parser, flags);
 }