1 files changed, 24 insertions, 0 deletions
diff --git a/window.c b/window.c
index d546780..47fad1a 100644
--- a/window.c
+++ b/window.c
@@ -788,6 +788,30 @@ size_t window_scroll_down(Win *win, int lines) {
 	return cursor->pos;
 }
 
+size_t window_line_up(Win *win) {
+	Cursor *cursor = &win->cursor;
+	if (cursor->line->prev && cursor->line->prev->prev &&
+	    cursor->line->lineno != cursor->line->prev->lineno &&
+	    cursor->line->prev->lineno != cursor->line->prev->prev->lineno)
+		return window_screenline_up(win);
+	size_t bol = text_line_begin(win->text, cursor->pos);
+	size_t prev = text_line_prev(win->text, bol);
+	size_t pos = text_line_offset(win->text, prev, cursor->pos - bol);
+	window_cursor_to(win, pos);
+	return cursor->pos;
+}
+
+size_t window_line_down(Win *win) {
+	Cursor *cursor = &win->cursor;
+	if (!cursor->line->next || cursor->line->next->lineno != cursor->line->lineno)
+		return window_screenline_down(win);
+	size_t bol = text_line_begin(win->text, cursor->pos);
+	size_t next = text_line_next(win->text, bol);
+	size_t pos = text_line_offset(win->text, next, cursor->pos - bol);
+	window_cursor_to(win, pos);
+	return cursor->pos;
+}
+
 size_t window_screenline_up(Win *win) {
 	Cursor *cursor = &win->cursor;
 	if (!cursor->line->prev)