Add resize-pane -x and -y for absolute pane size.

cmd-resize-pane.c

@@ -31,8 +31,8 @@ enum cmd_retval	 cmd_resize_pane_exec(struct cmd *, struct cmd_ctx *);
 
 const struct cmd_entry cmd_resize_pane_entry = {
 	"resize-pane", "resizep",
-	"DLRt:U", 0, 1,
-	"[-DLRU] " CMD_TARGET_PANE_USAGE " [adjustment]",
+	"DLRt:Ux:y:", 0, 1,
+	"[-DLRU] [-x width] [-y height] " CMD_TARGET_PANE_USAGE " [adjustment]",
 	0,
 	cmd_resize_pane_key_binding,
 	NULL,
@@ -87,8 +87,10 @@ cmd_resize_pane_exec(struct cmd *self, struct cmd_ctx *ctx)
 	struct args		*args = self->args;
 	struct winlink		*wl;
 	const char	       	*errstr;
+	char			*cause;
 	struct window_pane	*wp;
 	u_int			 adjust;
+	int			 x, y;
 
 	if ((wl = cmd_find_pane(ctx, args_get(args, 't'), NULL, &wp)) == NULL)
 		return (CMD_RETURN_ERROR);
@@ -103,6 +105,27 @@ cmd_resize_pane_exec(struct cmd *self, struct cmd_ctx *ctx)
 		}
 	}
 
+	if (args_has(self->args, 'x')) {
+		x = args_strtonum(self->args, 'x', PANE_MINIMUM, INT_MAX,
+		    &cause);
+		if (cause != NULL) {
+			ctx->error(ctx, "width %s", cause);
+			free(cause);
+			return (CMD_RETURN_ERROR);
+		}
+		layout_resize_pane_to(wp, LAYOUT_LEFTRIGHT, x);
+	}
+	if (args_has(self->args, 'y')) {
+		y = args_strtonum(self->args, 'y', PANE_MINIMUM, INT_MAX,
+		    &cause);
+		if (cause != NULL) {
+			ctx->error(ctx, "height %s", cause);
+			free(cause);
+			return (CMD_RETURN_ERROR);
+		}
+		layout_resize_pane_to(wp, LAYOUT_TOPBOTTOM, y);
+	}
+
 	if (args_has(self->args, 'L'))
 		layout_resize_pane(wp, LAYOUT_LEFTRIGHT, -adjust);
 	else if (args_has(self->args, 'R'))

layout.c

@@ -443,6 +443,39 @@ layout_resize(struct window *w, u_int sx, u_int sy)
 	layout_fix_panes(w, sx, sy);
 }
 
+/* Resize a pane to an absolute size. */
+void
+layout_resize_pane_to(struct window_pane *wp, enum layout_type type,
+    u_int new_size)
+{
+	struct layout_cell     *lc, *lcparent;
+	int			change, size;
+
+	lc = wp->layout_cell;
+
+	/* Find next parent of the same type. */
+	lcparent = lc->parent;
+	while (lcparent != NULL && lcparent->type != type) {
+		lc = lcparent;
+		lcparent = lc->parent;
+	}
+	if (lcparent == NULL)
+		return;
+
+	/* Work out the size adjustment. */
+	if (type == LAYOUT_LEFTRIGHT)
+		size = lc->sx;
+	else
+		size = lc->sy;
+	if (lc == TAILQ_LAST(&lcparent->cells, layout_cells))
+		change = size - new_size;
+	else
+		change = new_size - size;
+
+	/* Resize the pane. */
+	layout_resize_pane(wp, type, change);
+}
+
 /* Resize a single pane within the layout. */
 void
 layout_resize_pane(struct window_pane *wp, enum layout_type type, int change)
@@ -486,6 +519,7 @@ layout_resize_pane(struct window_pane *wp, enum layout_type type, int change)
 	notify_window_layout_changed(wp->window);
 }
 
+/* Resize pane based on mouse events. */
 void
 layout_resize_pane_mouse(struct client *c)
 {
@@ -534,6 +568,7 @@ layout_resize_pane_mouse(struct client *c)
 		m->flags &= ~MOUSE_RESIZE_PANE;
 }
 
+/* Helper function to grow pane. */
 int
 layout_resize_pane_grow(
     struct layout_cell *lc, enum layout_type type, int needed)
@@ -574,6 +609,7 @@ layout_resize_pane_grow(
 	return (size);
 }
 
+/* Helper function to shrink pane. */
 int
 layout_resize_pane_shrink(
     struct layout_cell *lc, enum layout_type type, int needed)

tmux.1

@@ -1557,17 +1557,25 @@ if specified, to
 .It Xo Ic resize-pane
 .Op Fl DLRU
 .Op Fl t Ar target-pane
+.Op Fl x Ar width
+.Op Fl y Ar height
 .Op Ar adjustment
 .Xc
 .D1 (alias: Ic resizep )
-Resize a pane, upward with
-.Fl U
-(the default), downward with
+Resize a pane, up, down, left or right by
+.Ar adjustment
+with
+.Fl U ,
 .Fl D ,
-to the left with
 .Fl L
-and to the right with
-.Fl R .
+or
+.Fl R ,
+or
+to an absolute size
+with
+.Fl x
+or
+.Fl y .
 The
 .Ar adjustment
 is given in lines or cells (the default is 1).

tmux.h

@@ -1167,7 +1167,7 @@ struct mouse_event {
 
 	u_int   sgr;		/* whether the input arrived in SGR format */
 	u_int   sgr_xb;		/* only for SGR: the unmangled button */
-	u_int   sgr_rel;	/* only for SGR: whether it is a release event */
+	u_int   sgr_rel;	/* only for SGR: if it is a release event */
 
 	u_int	button;
 	u_int	clicks;
@@ -2163,9 +2163,11 @@ void		 layout_resize_adjust(
 void		 layout_init(struct window *);
 void		 layout_free(struct window *);
 void		 layout_resize(struct window *, u_int, u_int);
-void		 layout_resize_pane(
-		     struct window_pane *, enum layout_type, int);
-void		 layout_resize_pane_mouse(struct client *c);
+void		 layout_resize_pane(struct window_pane *, enum layout_type,
+		     int);
+void		 layout_resize_pane_to(struct window_pane *, enum layout_type,
+		     u_int);
+void		 layout_resize_pane_mouse(struct client *);
 void		 layout_assign_pane(struct layout_cell *, struct window_pane *);
 struct layout_cell *layout_split_pane(
 		     struct window_pane *, enum layout_type, int, int);