css: Make test pass

The new css tree may change the order of selectors (keeping the
same semantics). This affects how the selectors are printed later,
which causes some css parsing tests to not match the references.

Fortunately the order is consistent between runs given the same
css, so we just have to switch around the order in some of the
.ref.css files.

gtk/gtkcssmatcher.c

@@ -185,6 +185,7 @@ static const GtkCssMatcherClass GTK_CSS_MATCHER_WIDGET_PATH = {
   gtk_css_matcher_widget_path_has_regions,
   gtk_css_matcher_widget_path_has_region,
   gtk_css_matcher_widget_path_has_position,
+  FALSE
 };
 
 gboolean
@@ -288,6 +289,7 @@ static const GtkCssMatcherClass GTK_CSS_MATCHER_ANY = {
   gtk_css_matcher_any_has_regions,
   gtk_css_matcher_any_has_region,
   gtk_css_matcher_any_has_position,
+  TRUE
 };
 
 void
@@ -406,6 +408,7 @@ static const GtkCssMatcherClass GTK_CSS_MATCHER_SUPERSET = {
   gtk_css_matcher_superset_has_regions,
   gtk_css_matcher_superset_has_region,
   gtk_css_matcher_superset_has_position,
+  FALSE
 };
 
 void

gtk/gtkcssmatcherprivate.h

@@ -50,6 +50,7 @@ struct _GtkCssMatcherClass {
                                                    gboolean               forward,
                                                    int                    a,
                                                    int                    b);
+  gboolean is_any;
 };
 
 struct _GtkCssMatcherWidgetPath {
@@ -146,6 +147,12 @@ _gtk_css_matcher_has_position (const GtkCssMatcher *matcher,
   return matcher->klass->has_position (matcher, forward, a, b);
 }
 
+static inline gboolean
+_gtk_css_matcher_matches_any (const GtkCssMatcher *matcher)
+{
+  return matcher->klass->is_any;
+}
+
 
 G_END_DECLS
 

gtk/gtkcssprovider.c

@@ -986,6 +986,7 @@ struct _WidgetPropertyValue {
 struct GtkCssRuleset
 {
   GtkCssSelector *selector;
+  GtkCssSelectorTree *selector_match;
   WidgetPropertyValue *widget_style;
   PropertyValue *styles;
   GtkBitmask *set_styles;
@@ -1011,6 +1012,7 @@ struct _GtkCssProviderPrivate
   GHashTable *keyframes;
 
   GArray *rulesets;
+  GtkCssSelectorTree *tree;
   GResource *resource;
 };
 
@@ -1271,17 +1273,10 @@ gtk_css_ruleset_add (GtkCssRuleset       *ruleset,
     ruleset->styles[i].section = NULL;
 }
 
-static gboolean
-gtk_css_ruleset_matches (GtkCssRuleset       *ruleset,
-                         const GtkCssMatcher *matcher)
-{
-  return _gtk_css_selector_matches (ruleset->selector, matcher);
-}
-
 static GtkCssChange
 gtk_css_ruleset_get_change (GtkCssRuleset *ruleset)
 {
-  return _gtk_css_selector_get_change (ruleset->selector);
+  return _gtk_css_selector_tree_match_get_change (ruleset->selector_match);
 }
 
 static void
@@ -1409,6 +1404,43 @@ gtk_css_provider_init (GtkCssProvider *css_provider)
                                            (GDestroyNotify) _gtk_css_value_unref);
 }
 
+static void
+verify_tree_match_results (GtkCssProvider *provider,
+			   const GtkCssMatcher *matcher,
+			   GPtrArray *tree_rules)
+{
+#ifdef VERIFY_TREE
+  GtkCssProviderPrivate *priv = provider->priv;
+  GtkCssRuleset *ruleset;
+  gboolean should_match;
+  int i, j;
+
+  for (i = 0; i < priv->rulesets->len; i++)
+    {
+      gboolean found = FALSE;
+
+      ruleset = &g_array_index (priv->rulesets, GtkCssRuleset, i);
+
+      for (j = 0; j < tree_rules->len; j++)
+	{
+	  if (ruleset == tree_rules->pdata[j])
+	    {
+	      found = TRUE;
+	      break;
+	    }
+	}
+      should_match = _gtk_css_selector_matches (ruleset->selector, matcher);
+      if (found != !!should_match)
+	{
+	  g_error ("expected rule '%s' to %s, but it %s\n",
+		   _gtk_css_selector_to_string (ruleset->selector),
+		   should_match ? "match" : "not match",
+		   found ? "matched" : "didn't match");
+	}
+    }
+#endif
+}
+
 static gboolean
 gtk_css_provider_get_style_property (GtkStyleProvider *provider,
                                      GtkWidgetPath    *path,
@@ -1419,6 +1451,7 @@ gtk_css_provider_get_style_property (GtkStyleProvider *provider,
   GtkCssProvider *css_provider = GTK_CSS_PROVIDER (provider);
   GtkCssProviderPrivate *priv = css_provider->priv;
   WidgetPropertyValue *val;
+  GPtrArray *tree_rules;
   GtkCssMatcher matcher;
   gboolean found = FALSE;
   gchar *prop_name;
@@ -1427,22 +1460,20 @@ gtk_css_provider_get_style_property (GtkStyleProvider *provider,
   if (!_gtk_css_matcher_init (&matcher, path, state))
     return FALSE;
 
+  tree_rules = _gtk_css_selector_tree_match_all (priv->tree, &matcher);
+  verify_tree_match_results (css_provider, &matcher, tree_rules);
+
   prop_name = g_strdup_printf ("-%s-%s",
                                g_type_name (pspec->owner_type),
                                pspec->name);
 
-  for (i = priv->rulesets->len - 1; i >= 0; i--)
+  for (i = tree_rules->len - 1; i >= 0; i--)
     {
-      GtkCssRuleset *ruleset;
-
-      ruleset = &g_array_index (priv->rulesets, GtkCssRuleset, i);
+      GtkCssRuleset *ruleset = tree_rules->pdata[i];
 
       if (ruleset->widget_style == NULL)
         continue;
 
-      if (!gtk_css_ruleset_matches (ruleset, &matcher))
-        continue;
-
       for (val = ruleset->widget_style; val != NULL; val = val->next)
 	{
 	  if (strcmp (val->name, prop_name) == 0)
@@ -1469,6 +1500,7 @@ gtk_css_provider_get_style_property (GtkStyleProvider *provider,
     }
 
   g_free (prop_name);
+  g_ptr_array_free (tree_rules, TRUE);
 
   return found;
 }
@@ -1506,17 +1538,19 @@ gtk_css_style_provider_lookup (GtkStyleProviderPrivate *provider,
   GtkCssProviderPrivate *priv;
   GtkCssRuleset *ruleset;
   guint j;
+  int i;
+  GPtrArray *tree_rules;
 
   css_provider = GTK_CSS_PROVIDER (provider);
   priv = css_provider->priv;
 
-  if (priv->rulesets->len == 0)
-    return;
+  tree_rules = _gtk_css_selector_tree_match_all (priv->tree, matcher);
+  verify_tree_match_results (css_provider, matcher, tree_rules);
 
-  for (ruleset = &g_array_index (priv->rulesets, GtkCssRuleset, priv->rulesets->len - 1);
-       ruleset >= &g_array_index (priv->rulesets, GtkCssRuleset, 0);
-       ruleset--)
+  for (i = tree_rules->len - 1; i >= 0; i--)
     {
+      ruleset = tree_rules->pdata[i];
+
       if (ruleset->styles == NULL)
         continue;
 
@@ -1524,9 +1558,6 @@ gtk_css_style_provider_lookup (GtkStyleProviderPrivate *provider,
                                     ruleset->set_styles))
         continue;
 
-      if (!gtk_css_ruleset_matches (ruleset, matcher))
-        continue;
-
       for (j = 0; j < ruleset->n_styles; j++)
         {
           GtkCssStyleProperty *prop = ruleset->styles[j].property;
@@ -1544,6 +1575,8 @@ gtk_css_style_provider_lookup (GtkStyleProviderPrivate *provider,
       if (_gtk_bitmask_is_empty (_gtk_css_lookup_get_missing (lookup)))
         break;
     }
+
+  g_ptr_array_free (tree_rules, TRUE);
 }
 
 static GtkCssChange
@@ -1553,26 +1586,29 @@ gtk_css_style_provider_get_change (GtkStyleProviderPrivate *provider,
   GtkCssProvider *css_provider;
   GtkCssProviderPrivate *priv;
   GtkCssChange change = 0;
+  GPtrArray *tree_rules;
   int i;
 
   css_provider = GTK_CSS_PROVIDER (provider);
   priv = css_provider->priv;
 
-  for (i = priv->rulesets->len - 1; i >= 0; i--)
+  tree_rules = _gtk_css_selector_tree_match_all (priv->tree, matcher);
+  verify_tree_match_results (css_provider, matcher, tree_rules);
+
+  for (i = tree_rules->len - 1; i >= 0; i--)
     {
       GtkCssRuleset *ruleset;
 
-      ruleset = &g_array_index (priv->rulesets, GtkCssRuleset, i);
+      ruleset = tree_rules->pdata[i];
 
       if (ruleset->styles == NULL)
         continue;
 
-      if (!gtk_css_ruleset_matches (ruleset, matcher))
-        continue;
-
       change |= gtk_css_ruleset_get_change (ruleset);
     }
 
+  g_ptr_array_free (tree_rules, TRUE);
+
   return change;
 }
 
@@ -1599,6 +1635,7 @@ gtk_css_provider_finalize (GObject *object)
     gtk_css_ruleset_clear (&g_array_index (priv->rulesets, GtkCssRuleset, i));
 
   g_array_free (priv->rulesets, TRUE);
+  _gtk_css_selector_tree_free (priv->tree);
 
   g_hash_table_destroy (priv->symbolic_colors);
   g_hash_table_destroy (priv->keyframes);
@@ -1736,6 +1773,9 @@ gtk_css_provider_reset (GtkCssProvider *css_provider)
   for (i = 0; i < priv->rulesets->len; i++)
     gtk_css_ruleset_clear (&g_array_index (priv->rulesets, GtkCssRuleset, i));
   g_array_set_size (priv->rulesets, 0);
+  _gtk_css_selector_tree_free (priv->tree);
+  priv->tree = NULL;
+
 }
 
 static void
@@ -2370,8 +2410,38 @@ static void
 gtk_css_provider_postprocess (GtkCssProvider *css_provider)
 {
   GtkCssProviderPrivate *priv = css_provider->priv;
+  GtkCssSelectorTreeBuilder *builder;
+  guint i;
 
   g_array_sort (priv->rulesets, gtk_css_provider_compare_rule);
+
+  builder = _gtk_css_selector_tree_builder_new ();
+  for (i = 0; i < priv->rulesets->len; i++)
+    {
+      GtkCssRuleset *ruleset;
+
+      ruleset = &g_array_index (priv->rulesets, GtkCssRuleset, i);
+
+      _gtk_css_selector_tree_builder_add (builder,
+					  ruleset->selector,
+					  &ruleset->selector_match,
+					  ruleset);
+    }
+
+  priv->tree = _gtk_css_selector_tree_builder_build (builder);
+  _gtk_css_selector_tree_builder_free (builder);
+
+#ifndef VERIFY_TREE
+  for (i = 0; i < priv->rulesets->len; i++)
+    {
+      GtkCssRuleset *ruleset;
+
+      ruleset = &g_array_index (priv->rulesets, GtkCssRuleset, i);
+
+      _gtk_css_selector_free (ruleset->selector);
+      ruleset->selector = NULL;
+    }
+#endif
 }
 
 static gboolean
@@ -2820,7 +2890,7 @@ gtk_css_ruleset_print (const GtkCssRuleset *ruleset,
   WidgetPropertyValue *widget_value;
   guint i;
 
-  _gtk_css_selector_print (ruleset->selector, str);
+  _gtk_css_selector_tree_match_print (ruleset->selector_match, str);
 
   g_string_append (str, " {\n");
 

gtk/gtkcssselectorprivate.h

@@ -24,6 +24,8 @@
 G_BEGIN_DECLS
 
 typedef struct _GtkCssSelector GtkCssSelector;
+typedef struct _GtkCssSelectorTree GtkCssSelectorTree;
+typedef struct _GtkCssSelectorTreeBuilder GtkCssSelectorTreeBuilder;
 
 GtkCssSelector *  _gtk_css_selector_parse           (GtkCssParser           *parser);
 void              _gtk_css_selector_free            (GtkCssSelector         *selector);
@@ -32,12 +34,27 @@ char *            _gtk_css_selector_to_string       (const GtkCssSelector   *sel
 void              _gtk_css_selector_print           (const GtkCssSelector   *selector,
                                                      GString                *str);
 
-GtkCssChange      _gtk_css_selector_get_change      (const GtkCssSelector   *selector);
 gboolean          _gtk_css_selector_matches         (const GtkCssSelector   *selector,
                                                      const GtkCssMatcher    *matcher);
 int               _gtk_css_selector_compare         (const GtkCssSelector   *a,
                                                      const GtkCssSelector   *b);
 
+void         _gtk_css_selector_tree_free             (GtkCssSelectorTree       *tree);
+GPtrArray *  _gtk_css_selector_tree_match_all        (const GtkCssSelectorTree *tree,
+						      const GtkCssMatcher      *matcher);
+void         _gtk_css_selector_tree_match_print      (const GtkCssSelectorTree *tree,
+						      GString                  *str);
+GtkCssChange _gtk_css_selector_tree_match_get_change (const GtkCssSelectorTree *tree);
+
+
+GtkCssSelectorTreeBuilder *_gtk_css_selector_tree_builder_new   (void);
+void                       _gtk_css_selector_tree_builder_add   (GtkCssSelectorTreeBuilder *builder,
+								 GtkCssSelector            *selectors,
+								 GtkCssSelectorTree       **selector_match,
+								 gpointer                   match);
+GtkCssSelectorTree *       _gtk_css_selector_tree_builder_build (GtkCssSelectorTreeBuilder *builder);
+void                       _gtk_css_selector_tree_builder_free  (GtkCssSelectorTreeBuilder *builder);
+
 G_END_DECLS
 
 #endif /* __GTK_CSS_SELECTOR_PRIVATE_H__ */

tests/css/parser/selector.ref.css

@@ -262,7 +262,7 @@ a ~ :hover {
   int-property: 42;
 }
 
-:hover.b {
+.b:hover {
   int-property: 42;
 }
 
@@ -398,7 +398,7 @@ a ~ #b {
   int-property: 42;
 }
 
-:hover#b {
+#b:hover {
   int-property: 42;
 }