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- ;; 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)
-
-