Only redraw affected lines when selection changes with mouse. From

Michael Graczyk.

diff --git a/usr.bin/tmux/window-copy.c b/usr.bin/tmux/window-copy.c
index dcdbe53..9ec9218 100644 (file)
--- a/usr.bin/tmux/window-copy.c
+++ b/usr.bin/tmux/window-copy.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: window-copy.c,v 1.120 2014/11/09 15:13:01 nicm Exp $ */
+/* $OpenBSD: window-copy.c,v 1.121 2014/12/15 10:02:55 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -33,6 +33,7 @@ int   window_copy_key_numeric_prefix(struct window_pane *, int);
 void   window_copy_mouse(struct window_pane *, struct session *,
            struct mouse_event *);
 
+void   window_copy_redraw_selection(struct window_pane *, u_int);
 void   window_copy_redraw_lines(struct window_pane *, u_int, u_int);
 void   window_copy_redraw_screen(struct window_pane *);
 void   window_copy_write_line(struct window_pane *, struct screen_write_ctx *,
@@ -874,7 +875,7 @@ window_copy_mouse(struct window_pane *wp, struct session *sess,
 {
        struct window_copy_mode_data    *data = wp->modedata;
        struct screen                   *s = &data->screen;
-       u_int                            i;
+       u_int                            i, old_cy;
 
        if (m->x >= screen_size_x(s))
                return;
@@ -907,9 +908,10 @@ window_copy_mouse(struct window_pane *wp, struct session *sess,
         */
        if (s->mode & MODE_MOUSE_BUTTON) {
                if (~m->event & MOUSE_EVENT_UP) {
+                       old_cy = data->cy;
                        window_copy_update_cursor(wp, m->x, m->y);
                        if (window_copy_update_selection(wp, 1))
-                               window_copy_redraw_screen(wp);
+                               window_copy_redraw_selection(wp, old_cy);
                        return;
                }
                goto reset_mode;
@@ -1245,6 +1247,23 @@ window_copy_write_lines(struct window_pane *wp, struct screen_write_ctx *ctx,
                window_copy_write_line(wp, ctx, py);
 }
 
+void
+window_copy_redraw_selection(struct window_pane *wp, u_int old_y)
+{
+       struct window_copy_mode_data    *data = wp->modedata;
+       u_int                            new_y, start, end;
+
+       new_y = data->cy;
+       if (old_y <= new_y) {
+               start = old_y;
+               end = new_y;
+       } else {
+               start = new_y;
+               end = old_y;
+       }
+       window_copy_redraw_lines(wp, start, end - start + 1);
+}
+
 void
 window_copy_redraw_lines(struct window_pane *wp, u_int py, u_int ny)
 {