vis

commit 9aa1b146d118b6a3440ef9375ea6d8b3582a3dfb
parent 3c29f893d7f0359ce3f0536f1cbb896b18b9eacc
Author: Marc André Tanner <mat@brain-dump.org>
Date:   Wed, 10 Sep 2014 21:00:47 +0200

text-motions: add text_line_prev function

Diffstat:
M
text-motions.c
 | 
14
++++++++++++++
M
text-motions.h
 | 
5
+++--

2 files changed, 17 insertions(+), 2 deletions(-)
diff --git a/text-motions.c b/text-motions.c
@@ -73,6 +73,20 @@ size_t text_find_char_prev(Text *txt, size_t pos, const char *s, size_t len) {
 	return matched == 0 ? it.pos : pos;
 }
 
+size_t text_line_prev(Text *txt, size_t pos) {
+	char c;
+	Iterator it = text_iterator_get(txt, pos);
+	if (!text_iterator_byte_get(&it, &c))
+		return pos;
+	if (c == '\r')
+		text_iterator_byte_prev(&it, &c);
+	if (c == '\n')
+		text_iterator_byte_prev(&it, &c);
+	while (text_iterator_byte_get(&it, &c) && c != '\n')
+		text_iterator_byte_prev(&it, NULL);
+	return it.pos;
+}
+
 size_t text_line_begin(Text *txt, size_t pos) {
 	char c;
 	Iterator it = text_iterator_get(txt, pos);
diff --git a/text-motions.h b/text-motions.h
@@ -24,9 +24,10 @@ size_t text_find_char_prev(Text*, size_t pos, const char *s, size_t len);
 /*        begin            finish        next
  *        v                v             v
  *  \n[\r]      I am a line!       \n[\r]
- *              ^                  ^
- *              start              end
+ *  ^           ^                  ^
+ *  prev        start              end
  */
+size_t text_line_prev(Text*, size_t pos);
 size_t text_line_begin(Text*, size_t pos);
 size_t text_line_start(Text*, size_t pos);
 size_t text_line_finish(Text*, size_t pos);