#ifndef __SHAPE_EDITOR_H__
#define __SHAPE_EDITOR_H__

/*
 * Inkscape::ShapeEditor
 *
 * This is a container class which contains either knotholder (for shapes) or nodepath (for
 * paths). It is attached to a single item so only one of these is active at a time.
 *
 * Authors:
 *   bulia byak <buliabyak@users.sf.net>
 *
 */

#include <forward.h>
#include <2geom/forward.h>

namespace Inkscape { namespace NodePath { class Path; } }
namespace Inkscape { namespace XML { class Node; } }

class KnotHolder;
class SPDesktop;
class SPNodeContext;
class ShapeEditorsCollective;
class LivePathEffectObject;

#include "libnr/nr-path-code.h"
#include <2geom/point.h>
#include <boost/optional.hpp>
#include <vector>

enum SubType{
    SH_NODEPATH,
    SH_KNOTHOLDER
};

class ShapeEditor {
public:

    ShapeEditor(SPDesktop *desktop);
    ~ShapeEditor();

    void set_item (SPItem *item, SubType type, bool keep_knotholder = false);
    void set_item_lpe_path_parameter(SPItem *item, LivePathEffectObject *lpeobject, const char * key);
    void unset_item (SubType type, bool keep_knotholder = false);

    bool has_nodepath (); //((deprecated))
    void update_knotholder (); //((deprecated))

    bool has_local_change (SubType type);
    void decrement_local_change (SubType type);

    GList *save_nodepath_selection ();
    void restore_nodepath_selection (GList *saved);

    void nodepath_destroyed ();

    void update_statusbar ();

    bool is_over_stroke (Geom::Point event_p, bool remember);

    void add_node_near_point(); // uses the shapeeditor's remembered point, if any

    void select_segment_near_point(bool toggle); // uses the shapeeditor's remembered point, if any

    void cancel_hit ();

    bool hits_curve ();

    void curve_drag (gdouble eventx, gdouble eventy);

    void finish_drag ();

    void select_rect (Geom::Rect  const &rect, bool add);

    bool has_selection ();
    void deselect ();

    Inkscape::NodePath::Path *get_nodepath() {return nodepath;} //((deprecated))
    ShapeEditorsCollective *get_container() {return container;}

    void add_node();

    void delete_nodes();
    void delete_nodes_preserving_shape();
    void delete_segment();

    void set_node_type(int type);

    void break_at_nodes();
    void join_nodes();
    void join_segments();

    void duplicate_nodes();

    void set_type_of_segments(NRPathcode code);

    void move_nodes(gdouble dx, gdouble dy);
    void move_nodes_screen(SPDesktop *desktop, gdouble dx, gdouble dy);

    void rotate_nodes(gdouble angle, int which, bool screen);

    void scale_nodes(gdouble const grow, int const which);
    void scale_nodes_screen(gdouble const grow, int const which);

    void select_all (bool invert);
    void select_all_from_subpath (bool invert);
    void select_next ();
    void select_prev ();

    void show_handles (bool show);
    void show_helperpath (bool show);

    void flip (Geom::Dim2 axis, boost::optional<Geom::Point> center = boost::optional<Geom::Point>());

    void distribute (Geom::Dim2 axis);
    void align (Geom::Dim2 axis);

    bool nodepath_edits_repr_key(gchar const *name);

    // this one is only public because it's called from non-C++ repr changed callback
    void shapeeditor_event_attr_changed(gchar const *name);

private:
    bool has_knotholder ();
    void reset_item (SubType type, bool keep_knotholder = true);
    const SPItem *get_item (SubType type);

    SPDesktop *desktop;

    Inkscape::NodePath::Path *nodepath;

    // TODO: std::list<KnotHolder *> knotholders;
    KnotHolder *knotholder;

    ShapeEditorsCollective *container;

    //Inkscape::XML::Node *lidtened_repr;

    double grab_t;
    int grab_node; // number of node grabbed by sp_node_context_is_over_stroke
    bool hit;
    Geom::Point curvepoint_event; // int coords from event
    Geom::Point curvepoint_doc; // same, in doc coords

    Inkscape::XML::Node *knotholder_listener_attached_for;
    Inkscape::XML::Node *nodepath_listener_attached_for;
};

#endif


/*
  Local Variables:
  mode:c++
  c-file-style:"stroustrup"
  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
  indent-tabs-mode:nil
  fill-column:99
  End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :