[goffice] Make GOPath a boxed type.

[Jean Bréfort <jbrefort src gnome org>]

commit 2e2ab385f2bf0d89142c38e4d9088acb23dcdd24
Author: Jean Brefort <jean brefort normalesup org>
Date:   Fri Apr 9 22:20:42 2010 +0200

    Make GOPath a boxed type.

 ChangeLog               |    6 ++++
 goffice/utils/go-path.c |   67 ++++++++++++++++++++++++++++++++++++++++++++++-
 goffice/utils/go-path.h |    8 +++++
 3 files changed, 80 insertions(+), 1 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index a62f1f6..a2473f7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 2010-04-09  Jean Brefort  <jean brefort normalesup org>
 
+	* goffice/utils/go-path.c (go_path_new), (go_path_free),
+	(go_path_ref), (go_path_get_type), (go_path_to_cairo): new GOPath functions.
+	* goffice/utils/go-path.h: ditto.
+
+2010-04-09  Jean Brefort  <jean brefort normalesup org>
+
 	* goffice/app/go-plugin.c (go_plugins_init), (go_plugins_add): fixed issues
 	related to components intialization.
 	* goffice/component/go-component-factory.c
diff --git a/goffice/utils/go-path.c b/goffice/utils/go-path.c
index d908ecb..3236d24 100644
--- a/goffice/utils/go-path.c
+++ b/goffice/utils/go-path.c
@@ -70,6 +70,7 @@ struct _GOPath {
 	GOPathDataBuffer *data_buffer_tail;
 
 	GOPathOptions 	  options;
+	unsigned	  refs; 
 };
 
 static void
@@ -161,6 +162,8 @@ go_path_new (void)
 		return NULL;
 	}
 
+	path->refs = 1;
+
 	return path;
 }
 
@@ -187,7 +190,8 @@ go_path_clear (GOPath *path)
  * go_path_free:
  * @path: a #GOPath
  *
- * Frees all memory allocated for @path.
+ * Decrements references count and frees all memory allocated for @path if
+ * references count reaches 0.
  **/
 
 void
@@ -197,6 +201,10 @@ go_path_free (GOPath *path)
 
 	g_return_if_fail (path != NULL);
 
+	path->refs--;
+	if (path->refs > 0)
+		return;
+
 	while (path->data_buffer_head != NULL) {
 		buffer = path->data_buffer_head->next;
 		go_path_data_buffer_free (path->data_buffer_head);
@@ -206,6 +214,35 @@ go_path_free (GOPath *path)
 }
 
 /**
+ * go_path_ref:
+ * @path: a #GOPath
+ *
+ * Increments references count to @path.
+ **/
+
+void
+go_path_ref (GOPath *path)
+{
+	g_return_if_fail (path != NULL);
+
+	path->refs++;
+}
+
+GType
+go_path_get_type (void)
+{
+    static GType type_path = 0;
+
+    if (!type_path)
+	type_path = g_boxed_type_register_static
+	    ("GOPath",
+	     (GBoxedCopyFunc) go_path_ref,
+	     (GBoxedFreeFunc) go_path_free);
+
+    return type_path;
+}
+
+/**
  * go_path_set_options:
  * @path: a #GOPath
  * @options: #GOPathOptions
@@ -533,3 +570,31 @@ go_path_interpret (GOPath const		*path,
 	}
 }
 
+static void
+go_path_cairo_move_to (cairo_t *cr, GOPathPoint const *point)
+{
+	cairo_move_to (cr, point->x, point->y);
+}
+
+static void
+go_path_cairo_line_to (cairo_t *cr, GOPathPoint const *point)
+{
+	cairo_line_to (cr, point->x, point->y);
+}
+
+static void
+go_path_cairo_curve_to (cairo_t *cr, GOPathPoint const *point0,
+			GOPathPoint const *point1, GOPathPoint const *point2)
+{
+	cairo_curve_to (cr, point0->x, point0->y, point1->x, point1->y, point2->x, point2->y);
+}
+
+void
+go_path_to_cairo (GOPath const *path, GOPathDirection direction, cairo_t *cr)
+{
+	go_path_interpret (path, direction,
+			   (GOPathMoveToFunc *) go_path_cairo_move_to,
+			   (GOPathLineToFunc *) go_path_cairo_line_to,
+			   (GOPathCurveToFunc *) go_path_cairo_curve_to,
+			   (GOPathClosePathFunc *) cairo_close_path, cr);
+}
diff --git a/goffice/utils/go-path.h b/goffice/utils/go-path.h
index ac676d9..08a9730 100644
--- a/goffice/utils/go-path.h
+++ b/goffice/utils/go-path.h
@@ -58,10 +58,14 @@ typedef void (GOPathCurveToFunc) 	(void *closure, GOPathPoint const *point0,
 							GOPathPoint const *point2);
 typedef void (GOPathClosePathFunc) 	(void *closure);
 
+GType   go_path_get_type (void);
+
+#define GO_TYPE_PATH go_path_get_type ()
 #define GO_IS_PATH(x) ((x) != NULL)
 
 GOPath *go_path_new 	      	(void);
 void 	go_path_clear	      	(GOPath *path);
+void    go_path_ref          	(GOPath *path);
 void    go_path_free          	(GOPath *path);
 
 void    	go_path_set_options  	(GOPath *path, GOPathOptions options);
@@ -100,6 +104,10 @@ void	go_path_interpret	(GOPath const *path,
 				 GOPathClosePathFunc *close_path,
 				 void *closure);
 
+void    go_path_to_cairo	(GOPath const *path,
+				 GOPathDirection direction,
+				 cairo_t *cr);
+
 G_END_DECLS
 
 #endif