[gtk/wip/matthiasc/css-change: 19/27] css: Don't got to the selector tree for change

[Matthias Clasen <matthiasc src gnome org>]

commit a8e9cc27d97d6499fc04541eb9c66e89d79fa377
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Jan 15 08:03:09 2020 -0500

    css: Don't got to the selector tree for change
    
    The tree is optimized for mimizing the decisions, and
    that prevents us from taking advantage of the more exact
    superset matching that we can do now. So, instead do what
    we used to do for verifiation: use the tree for finding the
    superset matches, then just walk the rulesets to collect the
    changes.

 gtk/gtkcssprovider.c | 87 +++++++++++++++++++++-------------------------------
 1 file changed, 35 insertions(+), 52 deletions(-)
---
diff --git a/gtk/gtkcssprovider.c b/gtk/gtkcssprovider.c
index 6039ecf8a3..077b14f71c 100644
--- a/gtk/gtkcssprovider.c
+++ b/gtk/gtkcssprovider.c
@@ -425,61 +425,43 @@ verify_tree_match_results (GtkCssProvider *provider,
 #endif
 }
 
-static void
-verify_tree_get_change_results (GtkCssProvider *provider,
-                               const GtkCssMatcher *matcher,
-                               GtkCssChange change)
+static GtkCssChange
+get_change (GtkCssProvider      *provider,
+            const GtkCssMatcher *matcher)
 {
-#ifdef VERIFY_TREE
+  GtkCssProviderPrivate *priv = gtk_css_provider_get_instance_private (provider);
+  GtkCssChange change = 0;
+  GPtrArray *tree_rules;
+  int i;
+
+  tree_rules = _gtk_css_selector_tree_match_all (priv->tree, matcher);
+  if (tree_rules)
+    {
+      for (i = tree_rules->len - 1; i >= 0; i--)
+        {
+         GtkCssRuleset *ruleset;
+
+          ruleset = tree_rules->pdata[i];
+
+          change |= _gtk_css_selector_get_change (ruleset->selector);
+        }
+
+      g_ptr_array_free (tree_rules, TRUE);
+   }
+
+#if 0
   {
-    GtkCssProviderPrivate *priv = gtk_css_provider_get_instance_private (provider);
-    GtkCssChange verify_change = 0;
-    GPtrArray *tree_rules;
-    int i;
-
-    tree_rules = _gtk_css_selector_tree_match_all (priv->tree, matcher);
-    if (tree_rules)
-      {
-        verify_tree_match_results (provider, matcher, tree_rules);
-
-        for (i = tree_rules->len - 1; i >= 0; i--)
-          {
-           GtkCssRuleset *ruleset;
-
-            ruleset = tree_rules->pdata[i];
-
-            verify_change |= _gtk_css_selector_get_change (ruleset->selector);
-          }
-
-        g_ptr_array_free (tree_rules, TRUE);
-      }
-
-    if (change != verify_change)
-      {
-       GString *s;
-
-       s = g_string_new ("");
-       g_string_append (s, "expected change ");
-        gtk_css_change_print (verify_change, s);
-        g_string_append (s, ", but it was ");
-        gtk_css_change_print (change, s);
-       if ((change & ~verify_change) != 0)
-          {
-           g_string_append (s, ", unexpectedly set: ");
-            gtk_css_change_print (change & ~verify_change, s);
-          }
-       if ((~change & verify_change) != 0)
-          {
-           g_string_append_printf (s, ", unexpectedly not set: ");
-            gtk_css_change_print (~change & verify_change, s);
-          }
-       g_warning (s->str);
-       g_string_free (s, TRUE);
-      }
+    char *s = gtk_css_matcher_to_string (matcher);
+    char *d = gtk_css_change_to_string (change);
+    int n = tree_rules ? tree_rules->len : 0;
+    g_print ("change for %s from %d rules: %s\n", s, n, d);
+    g_free (s);
+    g_free (d);
   }
 #endif
-}
 
+  return change;
+}
 
 static GtkCssValue *
 gtk_css_style_provider_get_color (GtkStyleProvider *provider,
@@ -557,8 +539,7 @@ gtk_css_style_provider_lookup (GtkStyleProvider    *provider,
 
       _gtk_css_matcher_superset_init (&change_matcher, matcher, &matcher_class, GTK_CSS_CHANGE_CLASS | 
GTK_CSS_CHANGE_NAME);
 
-      *change = _gtk_css_selector_tree_get_change_all (priv->tree, &change_matcher);
-      verify_tree_get_change_results (css_provider, &change_matcher, *change);
+      *change = get_change (css_provider, &change_matcher);
     }
 }
 
@@ -1049,6 +1030,7 @@ gtk_css_provider_postprocess (GtkCssProvider *css_provider)
   priv->tree = _gtk_css_selector_tree_builder_build (builder);
   _gtk_css_selector_tree_builder_free (builder);
 
+#if 0
 #ifndef VERIFY_TREE
   for (i = 0; i < priv->rulesets->len; i++)
     {
@@ -1060,6 +1042,7 @@ gtk_css_provider_postprocess (GtkCssProvider *css_provider)
       ruleset->selector = NULL;
     }
 #endif
+#endif
 }
 
 static void