Files
crib/src/editor_indents.cc

88 lines
2.0 KiB
C++

#include "../include/editor.h"
uint32_t leading_indent(const char *line, uint32_t len) {
uint32_t indent = 0;
for (uint32_t i = 0; i < len; i++) {
if (line[i] == ' ')
indent++;
else if (line[i] == '\t')
indent += INDENT_WIDTH;
else
break;
}
return indent;
}
uint32_t get_indent(Editor *editor, Coord cursor) {
if (!editor)
return 0;
LineIterator *it = begin_l_iter(editor->root, cursor.row);
next_line(it, nullptr);
uint32_t line_len;
char *line;
while ((line = prev_line(it, &line_len)) != nullptr) {
if (line_len == 0)
continue;
uint32_t indent = leading_indent(line, line_len);
free(it->buffer);
free(it);
return indent;
}
free(it->buffer);
free(it);
return 0;
}
bool closing_after_cursor(const char *line, uint32_t len, uint32_t col) {
uint32_t i = col;
while (i < len && (line[i] == ' ' || line[i] == '\t'))
i++;
if (i >= len)
return false;
return line[i] == '}' || line[i] == ']' || line[i] == ')';
}
void indent_line(Editor *editor, uint32_t row) {
if (!editor)
return;
LineIterator *it = begin_l_iter(editor->root, row);
uint32_t line_len;
char *line = next_line(it, &line_len);
if (!line) {
free(it->buffer);
free(it);
return;
}
char *spaces = (char *)malloc(INDENT_WIDTH);
memset(spaces, ' ', INDENT_WIDTH);
Coord cursor = editor->cursor;
edit_insert(editor, {row, 0}, spaces, INDENT_WIDTH);
editor->cursor = cursor;
free(spaces);
free(it->buffer);
free(it);
}
void dedent_line(Editor *editor, uint32_t row) {
if (!editor)
return;
LineIterator *it = begin_l_iter(editor->root, row);
uint32_t line_len;
char *line = next_line(it, &line_len);
if (!line) {
free(it->buffer);
free(it);
return;
}
uint32_t indent = leading_indent(line, line_len);
if (indent == 0) {
free(it->buffer);
free(it);
return;
}
uint32_t remove = indent >= INDENT_WIDTH ? INDENT_WIDTH : indent;
edit_erase(editor, {row, 0}, remove);
free(it->buffer);
free(it);
}