[gtk+] matcher: Use a vtable

[Benjamin Otte <otte src gnome org>]

commit b368c5f10aecc3c6fb9f0a09e9eaace3fd1c95dc
Author: Benjamin Otte <otte redhat com>
Date:   Sat Mar 17 14:28:07 2012 +0100

    matcher: Use a vtable
    
    Now we can do lots of fancy matchers, yay!

 gtk/gtkcssmatcher.c        |   92 ++++++++++++++++++++--------------
 gtk/gtkcssmatcherprivate.h |  115 ++++++++++++++++++++++++++++++++++++--------
 2 files changed, 148 insertions(+), 59 deletions(-)
---
diff --git a/gtk/gtkcssmatcher.c b/gtk/gtkcssmatcher.c
index c12403e..e796cfc 100644
--- a/gtk/gtkcssmatcher.c
+++ b/gtk/gtkcssmatcher.c
@@ -21,24 +21,14 @@
 
 #include "gtkwidgetpath.h"
 
-void
-_gtk_css_matcher_init (GtkCssMatcher       *matcher,
-                       const GtkWidgetPath *path,
-                       GtkStateFlags        state)
-{
-  matcher->path = path;
-  matcher->state_flags = state;
-  matcher->index = gtk_widget_path_length (path) - 1;
-  matcher->sibling_index = gtk_widget_path_iter_get_sibling_index (path, matcher->index);
-}
-
-gboolean
-_gtk_css_matcher_get_parent (GtkCssMatcher       *matcher,
-                             const GtkCssMatcher *child)
+static gboolean
+gtk_css_matcher_widget_path_get_parent (GtkCssMatcher       *matcher,
+                                        const GtkCssMatcher *child)
 {
   if (child->index == 0)
     return FALSE;
 
+  matcher->klass = child->klass;
   matcher->path = child->path;
   matcher->state_flags = 0;
   matcher->index = child->index - 1;
@@ -47,13 +37,14 @@ _gtk_css_matcher_get_parent (GtkCssMatcher       *matcher,
   return TRUE;
 }
 
-gboolean
-_gtk_css_matcher_get_previous (GtkCssMatcher       *matcher,
-                               const GtkCssMatcher *next)
+static gboolean
+gtk_css_matcher_widget_path_get_previous (GtkCssMatcher       *matcher,
+                                          const GtkCssMatcher *next)
 {
   if (next->sibling_index == 0)
     return FALSE;
 
+  matcher->klass = next->klass;
   matcher->path = next->path;
   matcher->state_flags = 0;
   matcher->index = next->index;
@@ -62,15 +53,15 @@ _gtk_css_matcher_get_previous (GtkCssMatcher       *matcher,
   return TRUE;
 }
 
-GtkStateFlags
-_gtk_css_matcher_get_state (const GtkCssMatcher *matcher)
+static GtkStateFlags
+gtk_css_matcher_widget_path_get_state (const GtkCssMatcher *matcher)
 {
   return matcher->state_flags;
 }
 
-gboolean
-_gtk_css_matcher_has_name (const GtkCssMatcher *matcher,
-                           const char          *name)
+static gboolean
+gtk_css_matcher_widget_path_has_name (const GtkCssMatcher *matcher,
+                                      const char          *name)
 {
   const GtkWidgetPath *siblings;
   GType type;
@@ -83,9 +74,9 @@ _gtk_css_matcher_has_name (const GtkCssMatcher *matcher,
     return g_type_is_a (gtk_widget_path_iter_get_object_type (matcher->path, matcher->index), type);
 }
 
-gboolean
-_gtk_css_matcher_has_class (const GtkCssMatcher *matcher,
-                            const char          *class_name)
+static gboolean
+gtk_css_matcher_widget_path_has_class (const GtkCssMatcher *matcher,
+                                       const char          *class_name)
 {
   const GtkWidgetPath *siblings;
   
@@ -96,9 +87,9 @@ _gtk_css_matcher_has_class (const GtkCssMatcher *matcher,
     return gtk_widget_path_iter_has_class (matcher->path, matcher->index, class_name);
 }
 
-gboolean
-_gtk_css_matcher_has_id (const GtkCssMatcher *matcher,
-                         const char          *id)
+static gboolean
+gtk_css_matcher_widget_path_has_id (const GtkCssMatcher *matcher,
+                                    const char          *id)
 {
   const GtkWidgetPath *siblings;
   
@@ -109,8 +100,8 @@ _gtk_css_matcher_has_id (const GtkCssMatcher *matcher,
     return gtk_widget_path_iter_has_name (matcher->path, matcher->index, id);
 }
 
-gboolean
-_gtk_css_matcher_has_regions (const GtkCssMatcher *matcher)
+static gboolean
+gtk_css_matcher_widget_path_has_regions (const GtkCssMatcher *matcher)
 {
   const GtkWidgetPath *siblings;
   GSList *regions;
@@ -127,10 +118,10 @@ _gtk_css_matcher_has_regions (const GtkCssMatcher *matcher)
   return result;
 }
 
-gboolean
-_gtk_css_matcher_has_region (const GtkCssMatcher *matcher,
-                             const char          *region,
-                             GtkRegionFlags       flags)
+static gboolean
+gtk_css_matcher_widget_path_has_region (const GtkCssMatcher *matcher,
+                                        const char          *region,
+                                        GtkRegionFlags       flags)
 {
   const GtkWidgetPath *siblings;
   GtkRegionFlags region_flags;
@@ -153,14 +144,14 @@ _gtk_css_matcher_has_region (const GtkCssMatcher *matcher,
   return TRUE;
 }
 
-guint
-_gtk_css_matcher_get_sibling_index (const GtkCssMatcher *matcher)
+static guint
+gtk_css_matcher_widget_path_get_sibling_index (const GtkCssMatcher *matcher)
 {
   return matcher->sibling_index;
 }
 
-guint
-_gtk_css_matcher_get_n_siblings (const GtkCssMatcher *matcher)
+static guint
+gtk_css_matcher_widget_path_get_n_siblings (const GtkCssMatcher *matcher)
 {
   const GtkWidgetPath *siblings;
 
@@ -171,3 +162,28 @@ _gtk_css_matcher_get_n_siblings (const GtkCssMatcher *matcher)
   return gtk_widget_path_length (siblings);
 }
 
+static const GtkCssMatcherClass GTK_CSS_MATCHER_WIDGET_PATH = {
+  gtk_css_matcher_widget_path_get_parent,
+  gtk_css_matcher_widget_path_get_previous,
+  gtk_css_matcher_widget_path_get_state,
+  gtk_css_matcher_widget_path_has_name,
+  gtk_css_matcher_widget_path_has_class,
+  gtk_css_matcher_widget_path_has_id,
+  gtk_css_matcher_widget_path_has_regions,
+  gtk_css_matcher_widget_path_has_region,
+  gtk_css_matcher_widget_path_get_sibling_index,
+  gtk_css_matcher_widget_path_get_n_siblings
+};
+
+void
+_gtk_css_matcher_init (GtkCssMatcher       *matcher,
+                       const GtkWidgetPath *path,
+                       GtkStateFlags        state)
+{
+  matcher->klass = &GTK_CSS_MATCHER_WIDGET_PATH;
+  matcher->path = path;
+  matcher->state_flags = state;
+  matcher->index = gtk_widget_path_length (path) - 1;
+  matcher->sibling_index = gtk_widget_path_iter_get_sibling_index (path, matcher->index);
+}
+
diff --git a/gtk/gtkcssmatcherprivate.h b/gtk/gtkcssmatcherprivate.h
index 704de53..83eff0e 100644
--- a/gtk/gtkcssmatcherprivate.h
+++ b/gtk/gtkcssmatcherprivate.h
@@ -24,36 +24,109 @@
 G_BEGIN_DECLS
 
 typedef struct _GtkCssMatcher GtkCssMatcher;
+typedef struct _GtkCssMatcherClass GtkCssMatcherClass;
 
-struct _GtkCssMatcher {
-  const GtkWidgetPath *path;
-  GtkStateFlags        state_flags;
-  guint                index;
-  guint                sibling_index;
-};
-
-void              _gtk_css_matcher_init           (GtkCssMatcher          *matcher,
-                                                   const GtkWidgetPath    *path,
-                                                   GtkStateFlags           state);
-gboolean          _gtk_css_matcher_get_parent     (GtkCssMatcher          *matcher,
+struct _GtkCssMatcherClass {
+  gboolean        (* get_parent)                  (GtkCssMatcher          *matcher,
                                                    const GtkCssMatcher    *child);
-gboolean          _gtk_css_matcher_get_previous   (GtkCssMatcher          *matcher,
+  gboolean        (* get_previous)                (GtkCssMatcher          *matcher,
                                                    const GtkCssMatcher    *next);
 
-GtkStateFlags     _gtk_css_matcher_get_state      (const GtkCssMatcher   *matcher);
-gboolean          _gtk_css_matcher_has_name       (const GtkCssMatcher   *matcher,
+  GtkStateFlags   (* get_state)                   (const GtkCssMatcher   *matcher);
+  gboolean        (* has_name)                    (const GtkCssMatcher   *matcher,
                                                    const char            *name);
-gboolean          _gtk_css_matcher_has_class      (const GtkCssMatcher   *matcher,
+  gboolean        (* has_class)                   (const GtkCssMatcher   *matcher,
                                                    const char            *class_name);
-gboolean          _gtk_css_matcher_has_id         (const GtkCssMatcher   *matcher,
+  gboolean        (* has_id)                      (const GtkCssMatcher   *matcher,
                                                    const char            *id);
-gboolean          _gtk_css_matcher_has_regions    (const GtkCssMatcher   *matcher);
-gboolean          _gtk_css_matcher_has_region     (const GtkCssMatcher   *matcher,
+  gboolean        (* has_regions)                 (const GtkCssMatcher   *matcher);
+  gboolean        (* has_region)                  (const GtkCssMatcher   *matcher,
                                                    const char            *region,
                                                    GtkRegionFlags         flags);
-guint             _gtk_css_matcher_get_sibling_index
-                                                  (const GtkCssMatcher   *matcher);
-guint             _gtk_css_matcher_get_n_siblings (const GtkCssMatcher   *matcher);
+  guint           (* get_sibling_index)           (const GtkCssMatcher   *matcher);
+  guint           (* get_n_siblings)              (const GtkCssMatcher   *matcher);
+};
+
+struct _GtkCssMatcher {
+  const GtkCssMatcherClass *klass;
+  const GtkWidgetPath      *path;
+  GtkStateFlags             state_flags;
+  guint                     index;
+  guint                     sibling_index;
+};
+
+void              _gtk_css_matcher_init           (GtkCssMatcher          *matcher,
+                                                   const GtkWidgetPath    *path,
+                                                   GtkStateFlags           state);
+
+static inline gboolean
+_gtk_css_matcher_get_parent (GtkCssMatcher       *matcher,
+                             const GtkCssMatcher *child)
+{
+  return child->klass->get_parent (matcher, child);
+}
+
+static inline gboolean
+_gtk_css_matcher_get_previous (GtkCssMatcher       *matcher,
+                               const GtkCssMatcher *next)
+{
+  return next->klass->get_previous (matcher, next);
+}
+
+static inline GtkStateFlags
+_gtk_css_matcher_get_state (const GtkCssMatcher *matcher)
+{
+  return matcher->klass->get_state (matcher);
+}
+
+static inline gboolean
+_gtk_css_matcher_has_name (const GtkCssMatcher *matcher,
+                           const char          *name)
+{
+  return matcher->klass->has_name (matcher, name);
+}
+
+static inline gboolean
+_gtk_css_matcher_has_class (const GtkCssMatcher *matcher,
+                            const char          *class_name)
+{
+  return matcher->klass->has_class (matcher, class_name);
+}
+
+static inline gboolean
+_gtk_css_matcher_has_id (const GtkCssMatcher *matcher,
+                         const char          *id)
+{
+  return matcher->klass->has_id (matcher, id);
+}
+
+
+static inline gboolean
+_gtk_css_matcher_has_regions (const GtkCssMatcher *matcher)
+{
+  return matcher->klass->has_regions (matcher);
+}
+
+static inline gboolean
+_gtk_css_matcher_has_region (const GtkCssMatcher *matcher,
+                             const char          *region,
+                             GtkRegionFlags       flags)
+{
+  return matcher->klass->has_region (matcher, region, flags);
+}
+
+static inline guint
+_gtk_css_matcher_get_sibling_index (const GtkCssMatcher *matcher)
+{
+  return matcher->klass->get_sibling_index (matcher);
+}
+
+static inline guint
+_gtk_css_matcher_get_n_siblings (const GtkCssMatcher *matcher)
+{
+  return matcher->klass->get_n_siblings (matcher);
+}
+
 
 G_END_DECLS