implement origin mode

1 files changed, 17 insertions, 0 deletions

diff --git a/src/screen.c b/src/screen.c
index b909cfb..e031e3e 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -261,6 +261,13 @@ void vt100_screen_move_to(VT100Screen *vt, int row, int col)
         : col >= vt->grid->max.col ? vt->grid->max.col - 1
         : col;
 
+    if (vt->origin_mode) {
+        row += vt->grid->scroll_top;
+        if (row > vt->grid->scroll_bottom) {
+            row = vt->grid->scroll_bottom;
+        }
+    }
+
     vt->grid->cur.row = row;
     vt->grid->cur.col = col;
 }
@@ -835,6 +842,16 @@ void vt100_screen_reset_bracketed_paste(VT100Screen *vt)
     vt->bracketed_paste = 0;
 }
 
+void vt100_screen_set_origin_mode(VT100Screen *vt)
+{
+    vt->origin_mode = 1;
+}
+
+void vt100_screen_reset_origin_mode(VT100Screen *vt)
+{
+    vt->origin_mode = 0;
+}
+
 void vt100_screen_set_window_title(VT100Screen *vt, char *buf, size_t len)
 {
     free(vt->title);