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Diffstat (limited to 'lisp/bg-mouse.el')
| -rw-r--r-- | lisp/bg-mouse.el | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/lisp/bg-mouse.el b/lisp/bg-mouse.el new file mode 100644 index 00000000000..fef1b2d56f2 --- /dev/null +++ b/lisp/bg-mouse.el @@ -0,0 +1,305 @@ +;; 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) + |