Fix issue of shouting error when removing a node. - It shout a Python traceback message when removing a node that is referenced by a svg:use node. - when the node been removed, the node would be duplicated. The duplication was used to replace the svg:use one. - The ID of inserted duplication is the same as duplicated node, and modified to a new and unique ID. - Original design of domview_monitor can not handle it. - It is resolved by changing domview_monitor._id2node from single mapping to multiple mapping one.

// -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 4; -*-
// vim: sw=4:ts=8:sts=4
#ifndef __MB_BASIC_TYPES_H_
#define __MB_BASIC_TYPES_H_

typedef float co_aix;
typedef float co_comp_t;
typedef struct _grad_stop {
    co_aix offset;
    co_comp_t r, g, b, a;
} grad_stop_t;

/*! \brief An rectangle area.
 *
 * This type is used to describe an rectangle area in an image or on a
 * screen.
 */
struct _area {
    co_aix x, y;
    co_aix w, h;
};
typedef struct _area area_t;

#endif /* __MB_BASIC_TYPES_H_ */