1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
// -*- C++ -*-
/* \file CoordCache.h
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author André Pönitz
*
* Full author contact details are available in file CREDITS.
*/
#ifndef COORDCACHE_H
#define COORDCACHE_H
// It seems that MacOSX define the check macro.
#undef check
#include "Dimension.h"
#include <map>
namespace lyx {
class Inset;
class Text;
class MathData;
class Paragraph;
void lyxbreaker(void const * data, const char * hint, int size);
struct Geometry {
Point pos;
Dimension dim;
bool covers(int x, int y) const
{
return x >= pos.x_
&& x <= pos.x_ + dim.wid
&& y >= pos.y_ - dim.asc
&& y <= pos.y_ + dim.des;
}
int squareDistance(int x, int y) const
{
int xx = 0;
int yy = 0;
if (x < pos.x_)
xx = pos.x_ - x;
else if (x > pos.x_ + dim.wid)
xx = x - pos.x_ - dim.wid;
if (y < pos.y_ - dim.asc)
yy = pos.y_ - dim.asc - y;
else if (y > pos.y_ + dim.des)
yy = y - pos.y_ - dim.des;
// Optimisation: We avoid to compute the sqrt on purpose.
return xx*xx + yy*yy;
}
};
template <class T> class CoordCacheBase {
public:
void clear()
{
data_.clear();
}
bool empty() const
{
return data_.empty();
}
void add(T const * thing, int x, int y)
{
data_[thing].pos = Point(x, y);
}
void add(T const * thing, Dimension const & dim)
{
if (!has(thing))
data_[thing].pos = Point(-10000, -10000);
data_[thing].dim = dim;
}
Geometry const & geometry(T const * thing) const
{
check(thing, "geometry");
return data_.find(thing)->second;
}
Dimension const & dim(T const * thing) const
{
checkDim(thing, "dim");
return data_.find(thing)->second.dim;
}
int x(T const * thing) const
{
check(thing, "x");
return data_.find(thing)->second.pos.x_;
}
int y(T const * thing) const
{
check(thing, "y");
return data_.find(thing)->second.pos.y_;
}
Point xy(T const * thing) const
{
check(thing, "xy");
return data_.find(thing)->second.pos;
}
bool has(T const * thing) const
{
typename cache_type::const_iterator it = data_.find(thing);
if (it == data_.end())
return false;
return it->second.pos.x_ != -10000;
}
bool hasDim(T const * thing) const
{
return data_.find(thing) != data_.end();
}
bool covers(T const * thing, int x, int y) const
{
typename cache_type::const_iterator it = data_.find(thing);
return it != data_.end() && it->second.covers(x, y);
}
int squareDistance(T const * thing, int x, int y) const
{
typename cache_type::const_iterator it = data_.find(thing);
if (it == data_.end())
return 1000000;
return it->second.squareDistance(x, y);
}
private:
friend class CoordCache;
void checkDim(T const * thing, char const * hint) const
{
if (!hasDim(thing))
lyxbreaker(thing, hint, data_.size());
}
void check(T const * thing, char const * hint) const
{
if (!has(thing))
lyxbreaker(thing, hint, data_.size());
}
typedef std::map<T const *, Geometry> cache_type;
cache_type data_;
};
/**
* A BufferView dependent cache that allows us to come from an inset in
* a document to a position point and dimension on the screen.
* All points cached in this cache are only valid between subsequent
* updates. (x,y) == (0,0) is the upper left screen corner, x increases
* to the right, y increases downwords.
* The dimension part is built in BufferView::updateMetrics() and the
* diverse Inset::metrics() calls.
* The individual points are added at drawing time in
* BufferView::draw(). The math inset position are cached in
* the diverse InsetMathXXX::draw() calls and the in-text inset position
* are cached in RowPainter::paintInset().
* FIXME: For mathed, it would be nice if the insets did not saves their
* position themselves. That should be the duty of the containing math
* array.
*/
class CoordCache {
public:
void clear();
/// A map from MathData to position on the screen
typedef CoordCacheBase<MathData> Arrays;
Arrays & arrays() { return arrays_; }
Arrays const & getArrays() const { return arrays_; }
/// A map from insets to positions on the screen
typedef CoordCacheBase<Inset> Insets;
Insets & insets() { return insets_; }
Insets const & getInsets() const { return insets_; }
/// Dump the contents of the cache to lyxerr in debugging form
void dump() const;
private:
/// MathDatas
Arrays arrays_;
// All insets
Insets insets_;
};
} // namespace lyx
#endif
|
