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
|
/* Copyright 2007, 2008 Peter Klausler. See COPYING for license. */
#include "all.h"
void view_fold(struct view *view, position_t cursor, position_t mark)
{
size_t bytes = mark - cursor;
char buf[8];
if (mark < cursor)
bytes = -bytes, cursor = mark;
if (cursor > view->bytes)
return;
if (cursor + bytes > view->bytes)
bytes = view->bytes - cursor;
if (!bytes)
return;
view_insert(view, buf, cursor + bytes, unicode_utf8(buf, FOLD_END+bytes));
view_insert(view, buf, cursor, unicode_utf8(buf, FOLD_START+bytes));
view->text->foldings++;
}
sposition_t view_unfold(struct view *view, position_t offset)
{
position_t next, next2;
size_t fbytes;
Unicode_t ch = view_unicode(view, offset, &next);
if (ch < FOLD_START || ch >= FOLD_END)
return -1;
fbytes = FOLDED_BYTES(ch);
if (view_unicode(view, next + fbytes, &next2) !=
FOLD_END + fbytes)
return -1;
view_delete(view, next + fbytes, next2 - (next + fbytes));
view_delete(view, offset, next - offset);
view->text->foldings--;
return offset + fbytes;
}
void view_unfold_selection(struct view *view)
{
position_t offset = locus_get(view, CURSOR);
position_t end = locus_get(view, MARK);
if (end == UNSET)
return;
if (end < offset) {
position_t t = end;
end = offset;
offset = t;
}
while (offset < end) {
position_t next, next2;
size_t fbytes;
Unicode_t ch = view_unicode(view, offset, &next);
if (!IS_UNICODE(ch))
break;
if (ch < FOLD_START || ch >= FOLD_END) {
offset = next;
continue;
}
fbytes = FOLDED_BYTES(ch);
if (view_unicode(view, next + fbytes, &next2) !=
FOLD_END + fbytes) {
offset = next;
continue;
}
view_delete(view, next + fbytes, next2 - (next + fbytes));
view_delete(view, offset, next - offset);
view->text->foldings--;
offset += fbytes;
}
}
static int indentation(struct view *view, position_t offset)
{
unsigned indent = 0, tabstop = view->text->tabstop;
Unicode_t ch;
tabstop |= !tabstop;
for (;;)
if ((ch = view_char(view, offset, &offset)) == ' ')
indent++;
else if (ch == '\t')
indent = (indent / tabstop + 1) * tabstop;
else if (ch == '\n')
return -1;
else
break;
return indent;
}
static unsigned max_indentation(struct view *view)
{
position_t offset, next;
int maxindent = 0;
for (offset = 0; offset < view->bytes; offset = next) {
int indent = indentation(view, offset);
if (indent > maxindent)
maxindent = indent;
next = find_line_end(view, offset) + 1;
}
return maxindent;
}
void view_fold_indented(struct view *view, unsigned minindent)
{
unsigned maxindent;
minindent |= !minindent;
while ((maxindent = max_indentation(view)) >= minindent) {
position_t offset, next;
sposition_t start = -1;
for (offset = 0; offset < view->bytes; offset = next) {
next = find_line_end(view, offset) + 1;
if (indentation(view, offset) < maxindent) {
if (start >= 0) {
view_fold(view, next = start, offset-1);
start = -1;
}
} else if (start < 0)
start = offset - !!offset;
}
if (start >= 0)
view_fold(view, start, offset-1);
}
}
void view_unfold_all(struct view *view)
{
position_t offset, next;
if (!view->text->foldings)
return;
for (offset = 0;
IS_UNICODE(view_unicode(view, offset, &next));
offset = next)
if (view_unfold(view, offset) >= 0) {
if (!view->text->foldings)
break;
next = offset;
}
}
void text_unfold_all(struct text *text)
{
struct view *view;
if (!text->foldings)
return;
view_unfold_all(view = view_create(text));
view_close(view);
}
|
