4.4BSD/usr/src/contrib/emacs-18.57/lisp/bg-mouse.el
;; GNU Emacs code for BBN Bitgraph mouse.
;; Copyright (C) Free Software Foundation, Inc. Oct 1985.
;; Time stamp <89/03/21 14:27:08 gildea>
;; This file is part of GNU Emacs.
;; GNU Emacs 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 1, or (at your option)
;; any later version.
;; GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to
;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
;;; Original version by John Robinson (jr@bbn-unix.arpa, bbncca!jr), Oct 1985
;;; Modularized and enhanced by gildea@bbn.com Nov 1987
(provide 'bg-mouse)
;;; User customization option:
(defvar bg-mouse-fast-select-window nil
"*Non-nil for mouse hits to select new window, then execute; else just select.")
;;; These numbers are summed to make the index into the mouse-map.
;;; The low three bits correspond to what the mouse actually sends.
(defconst bg-button-r 1)
(defconst bg-button-m 2)
(defconst bg-button-c 2)
(defconst bg-button-l 4)
(defconst bg-in-modeline 8)
(defconst bg-in-scrollbar 16)
(defconst bg-in-minibuf 24)
;;; semicolon screws up indenting, so use this instead
(defconst semicolon ?\;)
;;; Defuns:
(defun bg-mouse-report (prefix-arg)
"Read, parse, and execute a BBN BitGraph mouse click.
L-- move point | These apply for mouse click in a window.
--R set mark | If bg-mouse-fast-select-window is nil,
L-R kill region | these commands on a nonselected window
-C- move point and yank | just select that window.
LC- yank-pop |
-CR or LCR undo | \"Scroll bar\" is right-hand window column.
on modeline: on \"scroll bar\": in minibuffer:
L-- scroll-up line to top execute-extended-command
--R scroll-down line to bottom eval-expression
-C- proportional goto-char line to middle suspend-emacs
To reinitialize the mouse if the terminal is reset, type ESC : RET"
(interactive "P")
(bg-get-tty-num semicolon)
(let*
((screen-mouse-x (min (1- (screen-width)) ;don't hit column 86!
(/ (bg-get-tty-num semicolon) 9)))
(screen-mouse-y (- (1- (screen-height)) ;assume default font size.
(/ (bg-get-tty-num semicolon) 16)))
(bg-mouse-buttons (% (bg-get-tty-num ?c) 8))
(bg-mouse-window (bg-window-from-x-y screen-mouse-x screen-mouse-y))
(bg-cursor-window (selected-window))
(edges (window-edges bg-mouse-window))
(minibuf-p (= screen-mouse-y (1- (screen-height))))
(in-modeline-p (and (not minibuf-p)
(= screen-mouse-y (1- (nth 3 edges)))))
(in-scrollbar-p (and (not minibuf-p) (not in-modeline-p)
(>= screen-mouse-x (1- (nth 2 edges)))))
(same-window-p (eq bg-mouse-window bg-cursor-window))
(in-minibuf-p (and minibuf-p
(not bg-mouse-window))) ;minibuf must be inactive
(bg-mode-bits (+ (if in-minibuf-p bg-in-minibuf 0)
(if in-modeline-p bg-in-modeline 0)
(if in-scrollbar-p bg-in-scrollbar 0)))
(bg-command
(lookup-key mouse-map
(char-to-string (+ bg-mode-bits bg-mouse-buttons))))
(bg-mouse-x (- screen-mouse-x (nth 0 edges)))
(bg-mouse-y (- screen-mouse-y (nth 1 edges))))
(cond ((or in-modeline-p in-scrollbar-p)
(select-window bg-mouse-window)
(bg-command-execute bg-command)
(select-window bg-cursor-window))
((or same-window-p in-minibuf-p)
(bg-command-execute bg-command))
(t ;in another window
(select-window bg-mouse-window)
(if bg-mouse-fast-select-window
(bg-command-execute bg-command)))
)))
;;; Library of commands:
(defun bg-set-point ()
"Move point to location of BitGraph mouse."
(interactive)
(bg-move-point-to-x-y bg-mouse-x bg-mouse-y)
(setq this-command 'next-line) ;make subsequent line moves work
(setq temporary-goal-column bg-mouse-x))
(defun bg-set-mark ()
"Set mark at location of BitGraph mouse."
(interactive)
(push-mark)
(bg-move-point-to-x-y bg-mouse-x bg-mouse-y)
(exchange-point-and-mark))
(defun bg-yank ()
"Move point to location of BitGraph mouse and yank."
(interactive "*")
(bg-move-point-to-x-y bg-mouse-x bg-mouse-y)
(setq this-command 'yank)
(yank))
(defun yank-pop-1 ()
(interactive "*")
(yank-pop 1))
(defun bg-yank-or-pop ()
"Move point to location of BitGraph mouse and yank or yank-pop.
Do a yank unless last command was a yank, in which case do a yank-pop."
(interactive "*")
(if (eql last-command 'yank)
(yank-pop 1)
(bg-yank)))
;;; In 18.51, Emacs Lisp doesn't provide most-positive-fixnum
(defconst bg-most-positive-fixnum 8388607)
(defun bg-move-by-percentage ()
"Go to location in buffer that is the same percentage of the
way through the buffer as the BitGraph mouse's X position in the window."
(interactive)
;; check carefully for overflow in intermediate calculations
(goto-char
(cond ((zerop bg-mouse-x)
0)
((< (buffer-size) (/ bg-most-positive-fixnum bg-mouse-x))
;; no danger of overflow: compute it exactly
(/ (* bg-mouse-x (buffer-size))
(1- (window-width))))
(t
;; overflow possible: approximate
(* (/ (buffer-size) (1- (window-width)))
bg-mouse-x))))
(beginning-of-line)
(what-cursor-position))
(defun bg-mouse-line-to-top ()
"Scroll the line pointed to by the BitGraph mouse to the top of the window."
(interactive)
(scroll-up bg-mouse-y))
(defun bg-mouse-line-to-center ()
"Scroll the line pointed to by the BitGraph mouse to the center
of the window"
(interactive)
(scroll-up (/ (+ 2 bg-mouse-y bg-mouse-y (- (window-height))) 2)))
(defun bg-mouse-line-to-bottom ()
"Scroll the line pointed to by the mouse to the bottom of the window."
(interactive)
(scroll-up (+ bg-mouse-y (- 2 (window-height)))))
(defun bg-kill-region ()
(interactive "*")
(kill-region (region-beginning) (region-end)))
(defun bg-insert-moused-sexp ()
"Insert a copy of the word (actually sexp) that the mouse is pointing at.
Sexp is inserted into the buffer at point (where the text cursor is).
By gildea 7 Feb 89"
(interactive)
(let ((moused-text
(save-excursion
(bg-move-point-to-x-y bg-mouse-x bg-mouse-y)
(if (looking-at "\\s)")
(forward-char 1)
(forward-sexp 1))
(buffer-substring (save-excursion (backward-sexp 1) (point))
(point)))))
(select-window bg-cursor-window)
(delete-horizontal-space)
(cond
((bolp)
(indent-according-to-mode))
;; In Lisp assume double-quote is closing; in Text assume opening.
;; Why? Because it does the right thing most often.
((save-excursion (forward-char -1)
(and (not (looking-at "\\s\""))
(looking-at "[`'\"\\]\\|\\s(")))
nil)
(t
(insert-string " ")))
(insert-string moused-text)
(or (eolp)
(looking-at "\\s.\\|\\s)")
(and (looking-at "'") (looking-at "\\sw")) ;hack for text mode
(save-excursion (insert-string " ")))))
;;; Utility functions:
(defun bg-get-tty-num (term-char)
"Read from terminal until TERM-CHAR is read, and return intervening number.
If non-numeric not matching TERM-CHAR, reprogram the mouse and signal an error."
(let
((num 0)
(char (- (read-char) 48)))
(while (and (>= char 0)
(<= char 9))
(setq num (+ (* num 10) char))
(setq char (- (read-char) 48)))
(or (eq term-char (+ char 48))
(progn
(bg-program-mouse)
(error
"Invalid data format in bg-mouse command: mouse reinitialized.")))
num))
;;; Note that this fails in the minibuf because move-to-column doesn't
;;; allow for the width of the prompt.
(defun bg-move-point-to-x-y (x y)
"Position cursor in window coordinates.
X and Y are 0-based character positions in the window."
(move-to-window-line y)
;; if not on a wrapped line, zero-column will be 0
(let ((zero-column (current-column))
(scroll-offset (window-hscroll)))
;; scrolling takes up column 0 to display the $
(if (> scroll-offset 0)
(setq scroll-offset (1- scroll-offset)))
(move-to-column (+ zero-column scroll-offset x))
))
;;; Returns the window that screen position (x, y) is in or nil if none,
;;; meaning we are in the echo area with a non-active minibuffer.
;;; If coordinates-in-window-p were not in an X-windows-specific file
;;; we could use that. In Emacs 19 can even use locate-window-from-coordinates
(defun bg-window-from-x-y (x y)
"Find window corresponding to screen coordinates.
X and Y are 0-based character positions on the screen."
(let ((edges (window-edges))
(window nil))
(while (and (not (eq window (selected-window)))
(or (< y (nth 1 edges))
(>= y (nth 3 edges))
(< x (nth 0 edges))
(>= x (nth 2 edges))))
(setq window (next-window window))
(setq edges (window-edges window)))
(cond ((eq window (selected-window))
nil) ;we've looped: not found
((not window)
(selected-window)) ;just starting: current window
(t
window))
))
(defun bg-command-execute (bg-command)
(if (commandp bg-command)
(command-execute bg-command)
(ding)))
(defun bg-program-mouse ()
(send-string-to-terminal "\e:0;7;;;360;512;9;16;9;16c"))
;;; Note that the doc string for mouse-map (as defined in subr.el)
;;; says it is for the X-window mouse. This is wrong; that keymap
;;; should be used for your mouse no matter what terminal you have.
(or (keymapp mouse-map)
(setq mouse-map (make-keymap)))
(defun bind-bg-mouse-click (click-code function)
"Bind bg-mouse CLICK-CODE to run FUNCTION."
(define-key mouse-map (char-to-string click-code) function))
(bind-bg-mouse-click bg-button-l 'bg-set-point)
(bind-bg-mouse-click bg-button-m 'bg-yank)
(bind-bg-mouse-click bg-button-r 'bg-set-mark)
(bind-bg-mouse-click (+ bg-button-l bg-button-m) 'yank-pop-1)
(bind-bg-mouse-click (+ bg-button-l bg-button-r) 'bg-kill-region)
(bind-bg-mouse-click (+ bg-button-m bg-button-r) 'undo)
(bind-bg-mouse-click (+ bg-button-l bg-button-m bg-button-r) 'undo)
(bind-bg-mouse-click (+ bg-in-modeline bg-button-l) 'scroll-up)
(bind-bg-mouse-click (+ bg-in-modeline bg-button-m) 'bg-move-by-percentage)
(bind-bg-mouse-click (+ bg-in-modeline bg-button-r) 'scroll-down)
(bind-bg-mouse-click (+ bg-in-scrollbar bg-button-l) 'bg-mouse-line-to-top)
(bind-bg-mouse-click (+ bg-in-scrollbar bg-button-m) 'bg-mouse-line-to-center)
(bind-bg-mouse-click (+ bg-in-scrollbar bg-button-r) 'bg-mouse-line-to-bottom)
(bind-bg-mouse-click (+ bg-in-minibuf bg-button-l) 'execute-extended-command)
(bind-bg-mouse-click (+ bg-in-minibuf bg-button-m) 'suspend-emacs)
(bind-bg-mouse-click (+ bg-in-minibuf bg-button-r) 'eval-expression)