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
|
// This is an open source non-commercial project. Dear PVS-Studio, please check
// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
// plines.c: functions that calculate the vertical and horizontal size of text
#include <assert.h>
#include <inttypes.h>
#include <stdbool.h>
#include <string.h>
#include <limits.h>
#include "nvim/vim.h"
#include "nvim/ascii.h"
#include "nvim/plines.h"
#include "nvim/charset.h"
#include "nvim/cursor.h"
#include "nvim/diff.h"
#include "nvim/func_attr.h"
#include "nvim/fold.h"
#include "nvim/main.h"
#include "nvim/mbyte.h"
#include "nvim/memline.h"
#include "nvim/memory.h"
#include "nvim/move.h"
#include "nvim/option.h"
#include "nvim/screen.h"
#include "nvim/strings.h"
#include "nvim/window.h"
#include "nvim/buffer.h"
#ifdef INCLUDE_GENERATED_DECLARATIONS
# include "plines.c.generated.h"
#endif
/// @param winheight when true limit to window height
int plines_win(win_T *wp, linenr_T lnum, bool winheight)
{
// Check for filler lines above this buffer line. When folded the result
// is one line anyway.
return plines_win_nofill(wp, lnum, winheight) + diff_check_fill(wp, lnum);
}
/// @param winheight when true limit to window height
int plines_win_nofill(win_T *wp, linenr_T lnum, bool winheight)
{
if (!wp->w_p_wrap) {
return 1;
}
if (wp->w_width_inner == 0) {
return 1;
}
// A folded lines is handled just like an empty line.
if (lineFolded(wp, lnum)) {
return 1;
}
const int lines = plines_win_nofold(wp, lnum);
if (winheight && lines > wp->w_height_inner) {
return wp->w_height_inner;
}
return lines;
}
/// @Return number of window lines physical line "lnum" will occupy in window
/// "wp". Does not care about folding, 'wrap' or 'diff'.
int plines_win_nofold(win_T *wp, linenr_T lnum)
{
char_u *s;
unsigned int col;
int width;
s = ml_get_buf(wp->w_buffer, lnum, false);
if (*s == NUL) { // empty line
return 1;
}
col = win_linetabsize(wp, s, MAXCOL);
// If list mode is on, then the '$' at the end of the line may take up one
// extra column.
if (wp->w_p_list && wp->w_p_lcs_chars.eol != NUL) {
col += 1;
}
// Add column offset for 'number', 'relativenumber' and 'foldcolumn'.
width = wp->w_width_inner - win_col_off(wp);
if (width <= 0 || col > 32000) {
return 32000; // bigger than the number of screen columns
}
if (col <= (unsigned int)width) {
return 1;
}
col -= (unsigned int)width;
width += win_col_off2(wp);
assert(col <= INT_MAX && (int)col < INT_MAX - (width -1));
return ((int)col + (width - 1)) / width + 1;
}
/// Like plines_win(), but only reports the number of physical screen lines
/// used from the start of the line to the given column number.
int plines_win_col(win_T *wp, linenr_T lnum, long column)
{
// Check for filler lines above this buffer line. When folded the result
// is one line anyway.
int lines = diff_check_fill(wp, lnum);
if (!wp->w_p_wrap) {
return lines + 1;
}
if (wp->w_width_inner == 0) {
return lines + 1;
}
char_u *line = ml_get_buf(wp->w_buffer, lnum, false);
char_u *s = line;
colnr_T col = 0;
while (*s != NUL && --column >= 0) {
col += win_lbr_chartabsize(wp, line, s, col, NULL);
MB_PTR_ADV(s);
}
// If *s is a TAB, and the TAB is not displayed as ^I, and we're not in
// INSERT mode, then col must be adjusted so that it represents the last
// screen position of the TAB. This only fixes an error when the TAB wraps
// from one screen line to the next (when 'columns' is not a multiple of
// 'ts') -- webb.
if (*s == TAB && (State & NORMAL)
&& (!wp->w_p_list || wp->w_p_lcs_chars.tab1)) {
col += win_lbr_chartabsize(wp, line, s, col, NULL) - 1;
}
// Add column offset for 'number', 'relativenumber', 'foldcolumn', etc.
int width = wp->w_width_inner - win_col_off(wp);
if (width <= 0) {
return 9999;
}
lines += 1;
if (col > width) {
lines += (col - width) / (width + win_col_off2(wp)) + 1;
}
return lines;
}
/// Get the number of screen lines lnum takes up. This takes care of
/// both folds and topfill, and limits to the current window height.
///
/// @param[in] wp window line is in
/// @param[in] lnum line number
/// @param[out] nextp if not NULL, the line after a fold
/// @param[out] foldedp if not NULL, whether lnum is on a fold
/// @param[in] cache whether to use the window's cache for folds
///
/// @return the total number of screen lines
int plines_win_full(win_T *wp, linenr_T lnum, linenr_T *const nextp,
bool *const foldedp, const bool cache)
{
bool folded = hasFoldingWin(wp, lnum, NULL, nextp, cache, NULL);
if (foldedp) {
*foldedp = folded;
}
if (folded) {
return 1;
} else if (lnum == wp->w_topline) {
return plines_win_nofill(wp, lnum, true) + wp->w_topfill;
}
return plines_win(wp, lnum, true);
}
int plines_m_win(win_T *wp, linenr_T first, linenr_T last)
{
int count = 0;
while (first <= last) {
linenr_T next = first;
count += plines_win_full(wp, first, &next, NULL, false);
first = next + 1;
}
return count;
}
|
