css: Pass property_id to compute function

This is a reorganization of how value computing should be done.
Previously the GtkCssStyleProperty.compute vfunc was supposed to take
care of special cases when it needed those for computation. However,
this proved to be very complicated in cases where values were nested and
only the last value (of a common type) needed to be special cased.

A common example for this was the fallback handling for unresolvable
colors.

Now, we pass the property's ID along with all compute functions so we
can do the special casing where it's necessary.
Note that no actual changes happen in this commit. This will happen in
follow-ups.

1 files changed, 1 insertions, 0 deletions

diff --git a/gtk/gtkcssstringvalue.c b/gtk/gtkcssstringvalue.c
index b5813cd884..2bc140dd97 100644
--- a/gtk/gtkcssstringvalue.c
+++ b/gtk/gtkcssstringvalue.c
@@ -34,6 +34,7 @@ gtk_css_value_string_free (GtkCssValue *value)
 
 static GtkCssValue *
 gtk_css_value_string_compute (GtkCssValue     *value,
+                              guint            property_id,
                               GtkStyleContext *context)
 {
   return _gtk_css_value_ref (value);