Add new logical linewise movements

The column position is currently not correctly preserved when
there are lines with multibyte characters involved spanning
multiple screen lines.

In general this might still be a bit fragile.

1 files changed, 9 insertions, 0 deletions

diff --git a/text-motions.c b/text-motions.c
index 3a970e8..00e3cc8 100644
--- a/text-motions.c
+++ b/text-motions.c
@@ -154,6 +154,15 @@ size_t text_line_next(Text *txt, size_t pos) {
 	return it.pos;
 }
 
+size_t text_line_offset(Text *txt, size_t pos, size_t off) {
+	char c;
+	size_t bol = text_line_begin(txt, pos);
+	Iterator it = text_iterator_get(txt, bol);
+	while (off-- > 0 && text_iterator_byte_get(&it, &c) && c != '\r' && c != '\n')
+		text_iterator_byte_next(&it, NULL);
+	return it.pos;
+}
+
 static size_t text_customword_start_next(Text *txt, size_t pos, int (*isboundry)(int)) {
 	char c;
 	Iterator it = text_iterator_get(txt, pos);