--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/include/mb/redraw_man.h	Tue Nov 04 17:00:26 2008 +0800
@@ -0,0 +1,160 @@
+#ifndef __REDRAW_MAN_H_
+#define __REDRAW_MAN_H_
+
+#include <cairo.h>
+#include "tools.h"
+#include "mb_types.h"
+#include "observer.h"
+
+typedef struct _redraw_man redraw_man_t;
+
+typedef void (*free_func_t)(redraw_man_t *rdman, void *obj);
+struct _free_obj {
+    void *obj;
+    free_func_t free_func;
+};
+typedef struct _free_obj free_obj_t;
+struct _free_objs {
+    int num, max;
+    free_obj_t *objs;
+};
+typedef struct _free_objs free_objs_t;
+
+DARRAY(coords, coord_t *);
+DARRAY(geos, geo_t *);
+DARRAY(areas, area_t *);
+
+/*! \brief Manage redrawing of shapes (graphic elements).
+ *
+ * Every coord_t and geo_t object is assigned with a unique
+ * incremental order.  The order is a unsigned integer.
+ * Every time a new coord_t or geo_t object is added, it is
+ * assigned with a order number that 1 bigger than last one
+ * until reaching maximum of unsigned integer.
+ * When a maximum is meet, all coord_t or geo_t objects
+ * are reasigned with a new order number from 1.  It means
+ * order numbers that have been assigned and then removed
+ * later are recycled.
+ *
+ * Dirty flag is clear when the transformation matrix of a coord
+ * object been recomputed or when a geo_t objects been redrawed.
+ */
+struct _redraw_man {
+    unsigned int next_coord_order;
+    int n_coords;
+    coord_t *root_coord;
+
+    elmpool_t *geo_pool;
+    elmpool_t *coord_pool;
+    elmpool_t *shnode_pool;
+    elmpool_t *observer_pool;
+    elmpool_t *subject_pool;
+    elmpool_t *paint_color_pool;
+
+    coords_t dirty_coords;
+    geos_t dirty_geos;
+    areas_t dirty_areas;
+
+    geos_t gen_geos;
+
+    STAILQ(shape_t) shapes;	/*!< \brief All managed shapes.  */
+    STAILQ(paint_t) paints;	/*!< \brief All managed paints. */
+
+    free_objs_t free_objs;
+
+    cairo_t *cr;
+    cairo_t *backend;
+
+    ob_factory_t ob_factory;
+
+    subject_t *redraw;		/*!< \brief Notified after redrawing. */
+};
+
+extern int redraw_man_init(redraw_man_t *rdman, cairo_t *cr,
+			   cairo_t *backend);
+extern void redraw_man_destroy(redraw_man_t *rdman);
+extern int rdman_find_overlaid_shapes(redraw_man_t *rdman,
+				      geo_t *geo,
+				      geo_t ***overlays);
+extern int rdman_add_shape(redraw_man_t *rdman,
+			   shape_t *shape, coord_t *coord);
+/*! \brief Make a shape been managed by a redraw manager. */
+#define rdman_shape_man(rdman, shape)				\
+    STAILQ_INS_TAIL(rdman->shapes, shape_t, sh_next, shape)
+extern int rdman_shape_free(redraw_man_t *rdman, shape_t *shape);
+
+#define rdman_paint_man(rdman, paint)		\
+    STAILQ_INS_TAIL(rdman->paints, paint_t, pnt_next, shape)
+extern int rdman_paint_free(redraw_man_t *rdman, paint_t *paint);
+
+extern coord_t *rdman_coord_new(redraw_man_t *rdman, coord_t *parent);
+extern int rdman_coord_free(redraw_man_t *rdman, coord_t *coord);
+extern int rdman_coord_subtree_free(redraw_man_t *rdman, coord_t *subtree);
+extern int rdman_coord_changed(redraw_man_t *rdman, coord_t *coord);
+extern int rdman_shape_changed(redraw_man_t *rdman, shape_t *shape);
+extern int rdman_redraw_changed(redraw_man_t *rdman);
+extern int rdman_redraw_all(redraw_man_t *rdman);
+extern int rdman_redraw_area(redraw_man_t *rdman, co_aix x, co_aix y,
+			     co_aix w, co_aix h);
+extern geo_t *rdman_geos(redraw_man_t *rdman, geo_t *last);
+extern int rdman_force_clean(redraw_man_t *rdman);
+extern shnode_t *shnode_new(redraw_man_t *rdman, shape_t *shape);
+#define shnode_free(rdman, node) elmpool_elm_free((rdman)->shnode_pool, node)
+#define shnode_list_free(rdman, q)				\
+    do {							\
+	shnode_t *__node, *__last;				\
+	__last = STAILQ_HEAD(q);				\
+	if(__last == NULL) break;				\
+	for(__node = STAILQ_NEXT(shnode_t, next, __last);	\
+	    __node != NULL;					\
+	    __node = STAILQ_NEXT(shnode_t, next, __node)) {	\
+	    shnode_free(rdman, __last);				\
+	    __last = __node;					\
+	}							\
+	shnode_free(rdman, __last);				\
+    } while(0)
+#define _rdman_paint_child(rdman, paint, shape)		\
+    do {						\
+	shnode_t *__node;				\
+	if((shape)->fill != (paint) &&			\
+	   (shape)->stroke != (paint)) {		\
+	    __node = shnode_new(rdman, shape);		\
+	    STAILQ_INS_TAIL((paint)->members,		\
+			    shnode_t, next, __node);	\
+	}						\
+    } while(0)
+extern void _rdman_paint_real_remove_child(redraw_man_t *rdman,
+					   paint_t *paint,
+					   shape_t *shape);
+#define _rdman_paint_remove_child(rdman, paint, shape)		\
+    do {							\
+	if((shape)->fill == (shape)->stroke &&			\
+	   (shape)->stroke == paint)				\
+	    break;						\
+	_rdman_paint_real_remove_child(rdman, paint, shape);	\
+    } while(0)
+#define rdman_paint_fill(rdman, paint, shape)		\
+    do {						\
+	if((shape)->fill == paint)			\
+	    break;					\
+	_rdman_paint_remove_child(rdman, paint, shape);	\
+	_rdman_paint_child(rdman, paint, shape);	\
+	(shape)->fill = paint;				\
+    } while(0)
+#define rdman_paint_stroke(rdman, paint, shape)		\
+    do {						\
+	if((shape)->stroke == paint)			\
+	    break;					\
+	_rdman_paint_remove_child(rdman, paint, shape);	\
+	_rdman_paint_child(rdman, paint, shape);	\
+	(shape)->stroke = paint;			\
+    } while(0)
+extern int rdman_paint_changed(redraw_man_t *rdman, paint_t *paint);
+
+extern shape_t *find_shape_at_pos(redraw_man_t *rdman,
+				  co_aix x, co_aix y, int *in_stroke);
+#define rdman_get_ob_factory(rdman) (&(rdman)->ob_factory)
+#define rdman_get_redraw_subject(rdman) ((rdman)->redraw)
+
+
+#endif /* __REDRAW_MAN_H_ */