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
|
/*
* wrap.h
*
* Text wrapping, hyphenation, justification and shaping
*
* Copyright © 2014-2016 Thomas White <taw@bitwiz.org.uk>
*
* This file is part of Colloquium.
*
* Colloquium is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef WRAP_H
#define WRAP_H
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "frame.h"
#include "sc_interp.h"
#include "presentation.h"
enum wrap_box_type
{
WRAP_BOX_NOTHING,
WRAP_BOX_SENTINEL,
WRAP_BOX_PANGO,
WRAP_BOX_IMAGE,
WRAP_BOX_CALLBACK
};
/* Possible types of space following a wrap box */
enum wrap_box_space
{
WRAP_SPACE_INTERWORD, /* Normal inter-word space */
WRAP_SPACE_NONE, /* Box ends with an explicit hyphen or an SC
* block boundary */
WRAP_SPACE_EOP /* End of paragraph */
/* TODO: Space between sentences etc */
};
struct text_seg
{
PangoGlyphString *glyphs;
PangoAnalysis analysis;
/* Offset of this text segment into the wrap box */
int offs_char;
int len_chars;
/* Pango units */
int width;
int height;
int ascent;
};
/* A wrap box is a run of content - could be text, an image or so one - that is
* one logical unit as far as Colloquium is concerned. It might consist of
* multiple units, for example, in Pango's mind. */
struct wrap_box
{
enum wrap_box_type type;
int editable;
SCBlock *scblock;
int offs_char; /* offset (in characters, not bytes) into scblock */
/* Pango units */
int width;
int height;
int ascent;
enum wrap_box_space space; /* Type of "space" following box */
double sp; /* Calculated space (Pango units) after box */
/* For type == WRAP_BOX_PANGO */
PangoFont *font;
PangoFontDescription *fontdesc;
double col[4]; /* rgba colour */
int len_chars;
int n_segs;
struct text_seg *segs;
/* For type == WRAP_BOX_IMAGE */
char *filename;
/* For type == WRAP_BOX_CALLBACK */
SCCallbackDrawFunc draw_func;
SCCallbackClickFunc click_func;
void *bvp;
void *vp;
};
/* An actual wrap line, with geometry etc */
struct wrap_line
{
struct boxvec *boxes;
int width; /* Pango units */
int height; /* Pango units */
int ascent; /* Pango units */
int overfull;
int underfull;
int last_line;
};
extern int wrap_contents(struct frame *fr);
extern void get_cursor_pos(struct wrap_box *box, int pos,
double *xposd, double *yposd, double *line_height);
extern void find_cursor(struct frame *fr, double xposd, double yposd,
int *line, int *box, int *pos);
extern int alloc_boxes(struct wrap_line *l);
extern void initialise_line(struct wrap_line *l);
extern void wrap_line_free(struct wrap_line *l);
extern void show_boxes(struct boxvec *boxes);
extern double total_height(struct frame *fr);
extern int insert_box(struct wrap_line *l, int pos);
extern int which_segment(struct wrap_box *box, int pos, int *err);
#endif /* WRAP_H */
|
