119 lines
3.1 KiB
C++
119 lines
3.1 KiB
C++
#include "editor/editor.h"
|
|
|
|
uint32_t scan_left(const char *line, uint32_t len, uint32_t off) {
|
|
if (off > len)
|
|
off = len;
|
|
uint32_t i = off;
|
|
while (i > 0) {
|
|
unsigned char c = (unsigned char)line[i - 1];
|
|
if ((c & 0x80) != 0)
|
|
break;
|
|
if (!((c == '_') || (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z') ||
|
|
(c >= 'a' && c <= 'z')))
|
|
break;
|
|
--i;
|
|
}
|
|
return i;
|
|
}
|
|
|
|
uint32_t scan_right(const char *line, uint32_t len, uint32_t off) {
|
|
if (off > len)
|
|
off = len;
|
|
uint32_t i = off;
|
|
while (i < len) {
|
|
unsigned char c = (unsigned char)line[i];
|
|
if ((c & 0x80) != 0)
|
|
break;
|
|
if (!((c == '_') || (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z') ||
|
|
(c >= 'a' && c <= 'z')))
|
|
break;
|
|
++i;
|
|
}
|
|
return i;
|
|
}
|
|
|
|
void word_boundaries_exclusive(Editor *editor, Coord coord, uint32_t *prev_col,
|
|
uint32_t *next_col) {
|
|
if (!editor)
|
|
return;
|
|
std::shared_lock lock(editor->knot_mtx);
|
|
LineIterator *it = begin_l_iter(editor->root, coord.row);
|
|
if (!it)
|
|
return;
|
|
uint32_t line_len;
|
|
char *line = next_line(it, &line_len);
|
|
if (!line) {
|
|
free(it->buffer);
|
|
free(it);
|
|
return;
|
|
}
|
|
if (line_len && line[line_len - 1] == '\n')
|
|
line_len--;
|
|
uint32_t col = coord.col;
|
|
if (col > line_len)
|
|
col = line_len;
|
|
uint32_t left = scan_left(line, line_len, col);
|
|
uint32_t right = scan_right(line, line_len, col);
|
|
if (prev_col)
|
|
*prev_col = left;
|
|
if (next_col)
|
|
*next_col = right;
|
|
free(it->buffer);
|
|
free(it);
|
|
}
|
|
|
|
uint32_t word_jump_right(const char *line, size_t len, uint32_t pos) {
|
|
if (pos >= len)
|
|
return len;
|
|
size_t next = grapheme_next_word_break_utf8(line + pos, len - pos);
|
|
return static_cast<uint32_t>(pos + next);
|
|
}
|
|
|
|
uint32_t word_jump_left(const char *line, size_t len, uint32_t col) {
|
|
if (col == 0)
|
|
return 0;
|
|
size_t pos = 0;
|
|
size_t last = 0;
|
|
size_t cursor = col;
|
|
while (pos < len) {
|
|
size_t next = pos + grapheme_next_word_break_utf8(line + pos, len - pos);
|
|
if (next >= cursor)
|
|
break;
|
|
last = next;
|
|
pos = next;
|
|
}
|
|
return static_cast<uint32_t>(last);
|
|
}
|
|
|
|
void word_boundaries(Editor *editor, Coord coord, uint32_t *prev_col,
|
|
uint32_t *next_col, uint32_t *prev_clusters,
|
|
uint32_t *next_clusters) {
|
|
if (!editor)
|
|
return;
|
|
std::shared_lock lock(editor->knot_mtx);
|
|
LineIterator *it = begin_l_iter(editor->root, coord.row);
|
|
if (!it)
|
|
return;
|
|
uint32_t line_len;
|
|
char *line = next_line(it, &line_len);
|
|
if (!line)
|
|
return;
|
|
if (line_len && line[line_len - 1] == '\n')
|
|
line_len--;
|
|
size_t col = coord.col;
|
|
if (col > line_len)
|
|
col = line_len;
|
|
size_t left = word_jump_left(line, line_len, col);
|
|
size_t right = word_jump_right(line, line_len, col);
|
|
if (prev_col)
|
|
*prev_col = static_cast<uint32_t>(left);
|
|
if (next_col)
|
|
*next_col = static_cast<uint32_t>(right);
|
|
if (prev_clusters)
|
|
*prev_clusters = count_clusters(line, line_len, left, col);
|
|
if (next_clusters)
|
|
*next_clusters = count_clusters(line, line_len, col, right);
|
|
free(it->buffer);
|
|
free(it);
|
|
}
|