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#include <ctype.h>
#include "text-motions.h"
#include "text-objects.h"
#include "util.h"
static Filerange empty = {
.start = -1,
.end = -1,
};
Filerange text_object_word(Text *txt, size_t pos) {
Filerange r;
char c, prev = '0', next = '0';
Iterator it = text_iterator_get(txt, pos);
if (!text_iterator_byte_get(&it, &c))
return empty;
if (text_iterator_byte_prev(&it, &prev))
text_iterator_byte_next(&it, NULL);
text_iterator_byte_next(&it, &next);
if (isspace(c)) {
/* middle of two words, include leading white space */
r.start = text_char_next(txt, text_word_end_prev(txt, pos));
r.end = text_char_next(txt, text_word_end_next(txt, pos));
} else if (isspace(prev) && isspace(next)) {
/* on a single character */
r.start = pos;
r.end = text_word_start_next(txt, pos);
} else if (isspace(prev)) {
/* at start of a word */
r.start = pos;
r.end = text_word_start_next(txt, text_word_end_next(txt, pos));
} else if (isspace(next)) {
/* at end of a word */
r.start = text_word_start_prev(txt, pos);
r.end = text_word_start_next(txt, pos);
} else {
/* in the middle of a word */
r.start = text_word_start_prev(txt, pos);
r.end = text_word_start_next(txt, text_word_end_next(txt, pos));
}
return r;
}
Filerange text_object_sentence(Text *txt, size_t pos) {
Filerange r;
r.start = text_sentence_prev(txt, pos);
r.end = text_sentence_next(txt, pos);
return r;
}
Filerange text_object_paragraph(Text *txt, size_t pos) {
Filerange r;
r.start = text_paragraph_prev(txt, pos);
r.end = text_paragraph_next(txt, pos);
return r;
}
static Filerange text_object_bracket(Text *txt, size_t pos, char type) {
char c, open, close;
int opened = 1, closed = 1;
switch (type) {
case '(': case ')': open = '('; close = ')'; break;
case '{': case '}': open = '{'; close = '}'; break;
case '[': case ']': open = '['; close = ']'; break;
case '<': case '>': open = '<'; close = '>'; break;
case '"': open = '"'; close = '"'; break;
case '`': open = '`'; close = '`'; break;
case '\'': open = '\''; close = '\''; break;
default: return empty;
}
Filerange r = empty;
Iterator it = text_iterator_get(txt, pos);
if (open == close && text_iterator_byte_get(&it, &c) && (c == '"' || c == '`' || c == '\'')) {
size_t match = text_bracket_match(txt, pos);
r.start = MIN(pos, match) + 1;
r.end = MAX(pos, match);
return r;
}
while (text_iterator_byte_get(&it, &c)) {
if (c == open && --opened == 0) {
r.start = it.pos + 1;
break;
} else if (c == close && it.pos != pos) {
opened++;
}
text_iterator_byte_prev(&it, NULL);
}
it = text_iterator_get(txt, pos);
while (text_iterator_byte_get(&it, &c)) {
if (c == close && --closed == 0) {
r.end = it.pos;
break;
} else if (c == open && it.pos != pos) {
closed++;
}
text_iterator_byte_next(&it, NULL);
}
if (r.start == (size_t)-1 || r.end == (size_t)-1 || r.start > r.end)
return empty;
return r;
}
Filerange text_object_square_bracket(Text *txt, size_t pos) {
return text_object_bracket(txt, pos, ']');
}
Filerange text_object_curly_bracket(Text *txt, size_t pos) {
return text_object_bracket(txt, pos, '}');
}
Filerange text_object_angle_bracket(Text *txt, size_t pos) {
return text_object_bracket(txt, pos, '>');
}
Filerange text_object_paranthese(Text *txt, size_t pos) {
return text_object_bracket(txt, pos, ')');
}
Filerange text_object_quote(Text *txt, size_t pos) {
return text_object_bracket(txt, pos, '"');
}
Filerange text_object_single_quote(Text *txt, size_t pos) {
return text_object_bracket(txt, pos, '\'');
}
Filerange text_object_backtick(Text *txt, size_t pos) {
return text_object_bracket(txt, pos, '`');
}
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