From 43fa9a9ba60f0fba1f5c7985ed9c65cea304d2c4 Mon Sep 17 00:00:00 2001
From: Nicholas Marriott <nicm@openbsd.org>
Date: Mon, 31 May 2010 19:51:29 +0000
Subject: When the mode-mouse option is on, support dragging to make a
 selection in copy mode.

Also support the scroll wheel, although xterm strangely does not ignore
it in application mouse mode, causing redraw artifacts when scrolling up
(other terminals appear to be better behaved).
---
 window-copy.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 48 insertions(+), 4 deletions(-)

(limited to 'window-copy.c')

diff --git a/window-copy.c b/window-copy.c
index 3b42c456..66402eca 100644
--- a/window-copy.c
+++ b/window-copy.c
@@ -760,17 +760,61 @@ window_copy_mouse(
 {
 	struct window_copy_mode_data	*data = wp->modedata;
 	struct screen			*s = &data->screen;
+	u_int				 i;
+
+	/*
+	 * xterm mouse mode is fairly silly. Buttons are in the bottom two
+	 * bits: 0 button 1; 1 button 2; 2 button 3; 3 buttons released.
+	 *
+	 * Bit 3 is shift; bit 4 is meta; bit 5 control.
+	 *
+	 * Bit 6 is added for mouse buttons 4 and 5.
+	 */
 
-	if ((m->b & 3) == 3)
-		return;
 	if (m->x >= screen_size_x(s))
 		return;
 	if (m->y >= screen_size_y(s))
 		return;
 
-	window_copy_update_cursor(wp, m->x, m->y);
-	if (window_copy_update_selection(wp))
+	/* If mouse wheel (buttons 4 and 5), scroll. */
+	if ((m->b & 64) == 64) {
+		if ((m->b & 3) == 0) {
+			for (i = 0; i < 5; i++)
+				window_copy_cursor_up(wp, 0);
+		} else if ((m->b & 3) == 1) {
+			for (i = 0; i < 5; i++)
+				window_copy_cursor_down(wp, 0);
+		}
+		return;
+	}
+
+	/*
+	 * If already reading motion, move the cursor while buttons are still
+	 * pressed, or stop the selection on their release.
+	 */
+	if (s->mode & MODE_MOUSEMOTION) {
+		if ((m->b & 3) != 3) {
+			window_copy_update_cursor(wp, m->x, m->y);
+			if (window_copy_update_selection(wp))
+				window_copy_redraw_screen(wp);
+		} else {
+			s->mode &= ~MODE_MOUSEMOTION;
+			if (sess != NULL) {
+				window_copy_copy_selection(wp, sess);
+				window_pane_reset_mode(wp);
+			}
+		}
+		return;
+	}
+
+	/* Otherwise i other buttons pressed, start selection and motion. */
+	if ((m->b & 3) != 3) {
+		s->mode |= MODE_MOUSEMOTION;
+
+		window_copy_update_cursor(wp, m->x, m->y);
+		window_copy_start_selection(wp);
 		window_copy_redraw_screen(wp);
+	}
 }
 
 void
-- 
cgit