1 #ifndef SEEN_SNAP_CANDIDATE_H
2 #define SEEN_SNAP_CANDIDATE_H
4 /**
5 * \file snap-candidate.h
6 * \brief some utility classes to store various kinds of snap candidates.
7 *
8 * Authors:
9 * Diederik van Lierop <mail@diedenrezi.nl>
10 *
11 * Copyright (C) 2010 Authors
12 *
13 * Released under GNU GPL, read the file 'COPYING' for more information
14 */
16 //#include "snapped-point.h"
17 struct SPItem; // forward declaration
19 namespace Inkscape {
21 enum SnapTargetType {
22 SNAPTARGET_UNDEFINED = 0,
23 SNAPTARGET_GRID,
24 SNAPTARGET_GRID_INTERSECTION,
25 SNAPTARGET_GUIDE,
26 SNAPTARGET_GUIDE_INTERSECTION,
27 SNAPTARGET_GUIDE_ORIGIN,
28 SNAPTARGET_GRID_GUIDE_INTERSECTION,
29 SNAPTARGET_NODE_SMOOTH,
30 SNAPTARGET_NODE_CUSP,
31 SNAPTARGET_LINE_MIDPOINT,
32 SNAPTARGET_OBJECT_MIDPOINT,
33 SNAPTARGET_ROTATION_CENTER,
34 SNAPTARGET_HANDLE,
35 SNAPTARGET_PATH,
36 SNAPTARGET_PATH_INTERSECTION,
37 SNAPTARGET_BBOX_CORNER,
38 SNAPTARGET_BBOX_EDGE,
39 SNAPTARGET_BBOX_EDGE_MIDPOINT,
40 SNAPTARGET_BBOX_MIDPOINT,
41 SNAPTARGET_PAGE_BORDER,
42 SNAPTARGET_PAGE_CORNER,
43 SNAPTARGET_CONVEX_HULL_CORNER,
44 SNAPTARGET_ELLIPSE_QUADRANT_POINT,
45 SNAPTARGET_CENTER, // of ellipse
46 SNAPTARGET_CORNER, // of image or of rectangle
47 SNAPTARGET_TEXT_BASELINE,
48 SNAPTARGET_CONSTRAINED_ANGLE
49 };
51 enum SnapSourceType {
52 SNAPSOURCE_UNDEFINED = 0,
53 SNAPSOURCE_BBOX_CORNER,
54 SNAPSOURCE_BBOX_MIDPOINT,
55 SNAPSOURCE_BBOX_EDGE_MIDPOINT,
56 SNAPSOURCE_NODE_SMOOTH,
57 SNAPSOURCE_NODE_CUSP,
58 SNAPSOURCE_LINE_MIDPOINT,
59 SNAPSOURCE_OBJECT_MIDPOINT,
60 SNAPSOURCE_ROTATION_CENTER,
61 SNAPSOURCE_HANDLE,
62 SNAPSOURCE_PATH_INTERSECTION,
63 SNAPSOURCE_GUIDE,
64 SNAPSOURCE_GUIDE_ORIGIN,
65 SNAPSOURCE_CONVEX_HULL_CORNER,
66 SNAPSOURCE_ELLIPSE_QUADRANT_POINT,
67 SNAPSOURCE_CENTER, // of ellipse
68 SNAPSOURCE_CORNER, // of image or of rectangle
69 SNAPSOURCE_TEXT_BASELINE
70 };
72 /// Class to store data for points which are snap candidates, either as a source or as a target
73 class SnapCandidatePoint
74 {
75 public:
76 SnapCandidatePoint(Geom::Point const &point, Inkscape::SnapSourceType const source, long const source_num, Inkscape::SnapTargetType const target, Geom::OptRect const &bbox)
77 : _point(point),
78 _source_type(source),
79 _target_type(target),
80 _source_num(source_num),
81 _target_bbox(bbox)
82 {
83 };
85 SnapCandidatePoint(Geom::Point const &point, Inkscape::SnapSourceType const source, Inkscape::SnapTargetType const target)
86 : _point(point),
87 _source_type(source),
88 _target_type(target)
89 {
90 _source_num = 0;
91 _target_bbox = Geom::OptRect();
92 }
94 SnapCandidatePoint(Geom::Point const &point, Inkscape::SnapSourceType const source, long const source_num = 0)
95 : _point(point),
96 _source_type(source),
97 _target_type(Inkscape::SNAPTARGET_UNDEFINED),
98 _source_num(source_num)
99 {
100 _target_bbox = Geom::OptRect();
101 }
103 inline Geom::Point const & getPoint() const {return _point;}
104 inline Inkscape::SnapSourceType getSourceType() const {return _source_type;}
105 inline Inkscape::SnapTargetType getTargetType() const {return _target_type;}
106 inline long getSourceNum() const {return _source_num;}
107 inline Geom::OptRect const getTargetBBox() const {return _target_bbox;}
109 private:
110 // Coordinates of the point
111 Geom::Point _point;
113 // If this SnapCandidatePoint is a snap source, then _source_type must be defined. If it
114 // is a snap target, then _target_type must be defined. If it's yet unknown whether it will
115 // be a source or target, then both may be defined
116 Inkscape::SnapSourceType _source_type;
117 Inkscape::SnapTargetType _target_type;
119 //Sequence number of the source point within the set of points that is to be snapped. Starting at zero
120 long _source_num;
122 // If this is a target and it belongs to a bounding box, e.g. when the target type is
123 // SNAPTARGET_BBOX_EDGE_MIDPOINT, then _target_bbox stores the relevant bounding box
124 Geom::OptRect _target_bbox;
125 };
127 class SnapCandidateItem
128 {
129 public:
130 SnapCandidateItem(SPItem* item, bool clip_or_mask, Geom::Matrix additional_affine)
131 : item(item), clip_or_mask(clip_or_mask), additional_affine(additional_affine) {}
132 ~SnapCandidateItem() {};
134 SPItem* item; // An item that is to be considered for snapping to
135 bool clip_or_mask; // If true, then item refers to a clipping path or a mask
137 /* To find out the absolute position of a clipping path or mask, we not only need to know
138 * the transformation of the clipping path or mask itself, but also the transformation of
139 * the object to which the clip or mask is being applied; that transformation is stored here
140 */
141 Geom::Matrix additional_affine;
142 }
143 ;
145 class SnapCandidatePath
146 {
148 public:
149 SnapCandidatePath(Geom::PathVector* path, SnapTargetType target, Geom::OptRect bbox, bool edited = false)
150 : path_vector(path), target_type(target), target_bbox(bbox), currently_being_edited(edited) {};
151 ~SnapCandidatePath() {};
153 Geom::PathVector* path_vector;
154 SnapTargetType target_type;
155 Geom::OptRect target_bbox;
156 bool currently_being_edited; // true for the path that's currently being edited in the node tool (if any)
158 };
160 } // end of namespace Inkscape
162 #endif /* !SEEN_SNAP_CANDIDATE_H */