#| -*-Scheme-*-

Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
    1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
    2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016,
    2017, 2018, 2019 Massachusetts Institute of Technology

This file is part of MIT/GNU Scheme.

MIT/GNU Scheme is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at
your option) any later version.

MIT/GNU Scheme is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with MIT/GNU Scheme; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301,
USA.

|#

;;;; Mouse Commands

(declare (usual-integrations))

(define-command mouse-select
  "Select window the mouse is on."
  ()
  (lambda ()
    (select-window (button-event/window (current-button-event)))))

(define-command mouse-keep-one-window
  "Select window mouse is on, then kill all other windows."
  ()
  (lambda ()
    ((ref-command mouse-select))
    ((ref-command delete-other-windows))))

(define-command mouse-select-and-split
  "Select window mouse is on, then split it vertically in half."
  ()
  (lambda ()
    ((ref-command mouse-select))
    ((ref-command split-window-vertically) false)))

(define-command mouse-set-point
  "Select window mouse is on, and move point to mouse position."
  ()
  (lambda ()
    (let ((button-event (current-button-event)))
      (let ((window (button-event/window button-event)))
	(select-window window)
	(set-current-point!
	 (or (window-coordinates->mark window
				       (button-event/x button-event)
				       (button-event/y button-event))
	     (buffer-end (window-buffer window))))))))

(define-command mouse-set-mark
  "Select window mouse is on, and set mark at mouse position.
Display cursor at that position for a second."
  ()
  (lambda ()
    (let ((button-event (current-button-event)))
      (let ((window (button-event/window button-event)))
	(select-window window)
	(let ((mark
	       (or (window-coordinates->mark window
					     (button-event/x button-event)
					     (button-event/y button-event))
		   (buffer-end (window-buffer window)))))
	  (push-current-mark! mark)
	  (mark-flash mark))))))

(define-command mouse-show-event
  "Show the mouse position in the minibuffer."
  ()
  (lambda ()
    (let ((button-event (current-button-event)))
      (message "window: " (button-event/window button-event)
	       " x: " (button-event/x button-event)
	       " y: " (button-event/y button-event)))))

(define-command mouse-scroll-up
  "Scroll up mouse-scroll-increment lines."
  ()
  (lambda ()
    (scroll-window (selected-window)
		   (ref-variable mouse-scroll-increment)
		   (lambda () unspecific))))

(define-command mouse-scroll-down
  "Scroll down mouse-scroll-increment lines."
  ()
  (lambda ()
    (scroll-window (selected-window)
		   (- (ref-variable mouse-scroll-increment))
		   (lambda () unspecific))))

(define-variable mouse-scroll-increment
  "Number of lines by which a mouse-scroll event moves."
  5
  exact-nonnegative-integer?)

(define-command mouse-ignore
  "Don't do anything."
  ()
  (lambda () unspecific))

(define button1-down (make-down-button 0))
(define button2-down (make-down-button 1))
(define button3-down (make-down-button 2))
(define button4-down (make-down-button 3))
(define button5-down (make-down-button 4))
(define button1-up (make-up-button 0))
(define button2-up (make-up-button 1))
(define button3-up (make-up-button 2))
(define button4-up (make-up-button 3))
(define button5-up (make-up-button 4))