Rewrite of tmux mouse support which was a mess. Instead of having

options for "mouse-this" and "mouse-that", mouse events may be bound as
keys and there is one option "mouse" that turns on mouse support
entirely (set -g mouse on).

See the new MOUSE SUPPORT section of the man page for description of the
key names and new flags (-t= to specify the pane or window under mouse
as a target, and send-keys -M to pass through a mouse event).

The default builtin bindings for the mouse are:

    bind -n   MouseDown1Pane select-pane -t=; send-keys -M
    bind -n MouseDown1Status select-window -t=
    bind -n   MouseDrag1Pane copy-mode -M
    bind -n MouseDrag1Border resize-pane -M

To get the effect of turning mode-mouse off, do:

    unbind -n MouseDrag1Pane
    unbind -temacs-copy MouseDrag1Pane

The old mouse options are now gone, set-option -q may be used to
suppress warnings if mixing configuration files.

1 files changed, 21 insertions, 60 deletions

diff --git a/tty-keys.c b/tty-keys.c
index a987c44b..1df22d4c 100644
--- a/tty-keys.c
+++ b/tty-keys.c
@@ -644,8 +644,8 @@ tty_keys_mouse(struct tty *tty, const char *buf, size_t len, size_t *size)
 {
 	struct mouse_event	*m = &tty->mouse;
 	struct utf8_data	 utf8data;
-	u_int			 i, value, x, y, b, sgr, sgr_b, sgr_rel;
-	unsigned char		 c;
+	u_int			 i, value, x, y, b, sgr_b;
+	u_char			 sgr_type, c;
 
 	/*
 	 * Standard mouse sequences are \033[M followed by three characters
@@ -661,7 +661,8 @@ tty_keys_mouse(struct tty *tty, const char *buf, size_t len, size_t *size)
 	 */
 
 	*size = 0;
-	x = y = b = sgr = sgr_b = sgr_rel = 0;
+	x = y = b = sgr_b = 0;
+	sgr_type = ' ';
 
 	/* First two bytes are always \033[. */
 	if (buf[0] != '\033')
@@ -708,7 +709,7 @@ tty_keys_mouse(struct tty *tty, const char *buf, size_t len, size_t *size)
 			else
 				y = value;
 		}
-		log_debug("mouse input: %.*s", (int) *size, buf);
+		log_debug("mouse input: %.*s", (int)*size, buf);
 
 		/* Check and return the mouse input. */
 		if (b < 32)
@@ -748,22 +749,26 @@ tty_keys_mouse(struct tty *tty, const char *buf, size_t len, size_t *size)
 		while (1) {
 			if (len <= *size)
 				return (1);
-			c = (u_char) buf[(*size)++];
+			c = (u_char)buf[(*size)++];
 			if (c == 'M' || c == 'm')
 				break;
 			if (c < '0' || c > '9')
 				return (-1);
 			y = 10 * y + (c - '0');
 		}
-		log_debug("mouse input (sgr): %.*s", (int) *size, buf);
+		log_debug("mouse input (SGR): %.*s", (int)*size, buf);
 
 		/* Check and return the mouse input. */
 		if (x < 1 || y < 1)
 			return (-1);
 		x--;
 		y--;
-		sgr = 1;
-		sgr_rel = (c == 'm');
+		b = sgr_b;
+
+		/* Type is M for press, m for release. */
+		sgr_type = c;
+		if (sgr_type == 'm')
+			b |= 3;
 
 		/*
 		 * Some terminals (like PuTTY 0.63) mistakenly send
@@ -771,64 +776,20 @@ tty_keys_mouse(struct tty *tty, const char *buf, size_t len, size_t *size)
 		 * Discard it before it reaches any program running inside
 		 * tmux.
 		 */
-		if (sgr_rel && (sgr_b & 64))
+		if (sgr_type == 'm' && (sgr_b & 64))
 		    return (-2);
-
-		/* Figure out what b would be in old format. */
-		b = sgr_b;
-		if (sgr_rel)
-			b |= 3;
 	} else
 		return (-1);
 
-	/* Fill in mouse structure. */
-	if (~m->event & MOUSE_EVENT_WHEEL) {
-		m->lx = m->x;
-		m->ly = m->y;
-	}
-	m->xb = b;
-	m->sgr = sgr;
-	m->sgr_xb = sgr_b;
-	m->sgr_rel = sgr_rel;
+	/* Fill mouse event. */
+	m->lx = m->x;
 	m->x = x;
+	m->ly = m->y;
 	m->y = y;
-	if (b & MOUSE_MASK_WHEEL) {
-		if (b & MOUSE_MASK_SHIFT)
-			m->scroll = 1;
-		else
-			m->scroll = MOUSE_WHEEL_SCALE;
-		if (b & MOUSE_MASK_META)
-			m->scroll *= MOUSE_WHEEL_SCALE;
-		if (b & MOUSE_MASK_CTRL)
-			m->scroll *= MOUSE_WHEEL_SCALE;
-
-		b &= MOUSE_MASK_BUTTONS;
-		if (b == 0)
-			m->wheel = MOUSE_WHEEL_UP;
-		else if (b == 1)
-			m->wheel = MOUSE_WHEEL_DOWN;
-		m->event = MOUSE_EVENT_WHEEL;
-
-		m->button = 3;
-	} else if ((b & MOUSE_MASK_BUTTONS) == 3) {
-		if (~m->event & MOUSE_EVENT_DRAG && x == m->sx && y == m->sy) {
-			m->event = MOUSE_EVENT_CLICK;
-			m->clicks = (m->clicks + 1) % 3;
-		} else
-			m->event = MOUSE_EVENT_DRAG;
-		m->event |= MOUSE_EVENT_UP;
-	} else {
-		if (b & MOUSE_MASK_DRAG)
-			m->event = MOUSE_EVENT_DRAG;
-		else {
-			m->event = MOUSE_EVENT_DOWN;
-			if (x != m->sx || y != m->sy)
-				m->clicks = 0;
-		}
-		m->button = (b & MOUSE_MASK_BUTTONS);
-	}
-	m->sx = x;
-	m->sy = y;
+	m->lb = m->b;
+	m->b = b;
+	m->sgr_type = sgr_type;
+	m->sgr_b = sgr_b;
 
 	return (0);
 }