1;;; bg-mouse.el --- GNU Emacs code for BBN Bitgraph mouse. 2 3;; Copyright (C) Free Software Foundation, Inc. Oct 1985. 4 5;; Author: John Robinson <jr@bbn-unix.arpa> 6;; Stephen Gildea <gildea@bbn.com> 7;; Maintainer: FSF 8;; Keywords: hardware 9 10;; This file is part of GNU Emacs. 11 12;; GNU Emacs is free software; you can redistribute it and/or modify 13;; it under the terms of the GNU General Public License as published by 14;; the Free Software Foundation; either version 2, or (at your option) 15;; any later version. 16 17;; GNU Emacs is distributed in the hope that it will be useful, 18;; but WITHOUT ANY WARRANTY; without even the implied warranty of 19;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20;; GNU General Public License for more details. 21 22;; You should have received a copy of the GNU General Public License 23;; along with GNU Emacs; see the file COPYING. If not, write to 24;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 25 26;;; Code: 27 28;;; Original version by John Robinson (jr@bbn-unix.arpa, bbncca!jr), Oct 1985 29;;; Modularized and enhanced by gildea@bbn.com Nov 1987 30;;; Time stamp <89/03/21 14:27:08 gildea> 31 32;;; User customization option: 33 34(defvar bg-mouse-fast-select-window nil 35 "*Non-nil for mouse hits to select new window, then execute; else just select.") 36 37;;; These numbers are summed to make the index into the mouse-map. 38;;; The low three bits correspond to what the mouse actually sends. 39(defconst bg-button-r 1) 40(defconst bg-button-m 2) 41(defconst bg-button-c 2) 42(defconst bg-button-l 4) 43(defconst bg-in-modeline 8) 44(defconst bg-in-scrollbar 16) 45(defconst bg-in-minibuf 24) 46 47;;; semicolon screws up indenting, so use this instead 48(defconst semicolon ?\;) 49 50;;; Defuns: 51 52(defun bg-mouse-report (prefix-arg) 53 "Read, parse, and execute a BBN BitGraph mouse click. 54 55L-- move point | These apply for mouse click in a window. 56--R set mark | If bg-mouse-fast-select-window is nil, 57L-R kill region | these commands on a nonselected window 58-C- move point and yank | just select that window. 59LC- yank-pop | 60-CR or LCR undo | \"Scroll bar\" is right-hand window column. 61 62on modeline: on \"scroll bar\": in minibuffer: 63L-- scroll-up line to top execute-extended-command 64--R scroll-down line to bottom eval-expression 65-C- proportional goto-char line to middle suspend-emacs 66 67To reinitialize the mouse if the terminal is reset, type ESC : RET" 68 (interactive "P") 69 (bg-get-tty-num semicolon) 70 (let* 71 ((screen-mouse-x (min (1- (frame-width)) ;don't hit column 86! 72 (/ (bg-get-tty-num semicolon) 9))) 73 (screen-mouse-y (- (1- (frame-height)) ;assume default font size. 74 (/ (bg-get-tty-num semicolon) 16))) 75 (bg-mouse-buttons (% (bg-get-tty-num ?c) 8)) 76 (bg-mouse-window (bg-window-from-x-y screen-mouse-x screen-mouse-y)) 77 (bg-cursor-window (selected-window)) 78 (edges (window-edges bg-mouse-window)) 79 (minibuf-p (= screen-mouse-y (1- (screen-height)))) 80 (in-modeline-p (and (not minibuf-p) 81 (= screen-mouse-y (1- (nth 3 edges))))) 82 (in-scrollbar-p (and (not minibuf-p) (not in-modeline-p) 83 (>= screen-mouse-x (1- (nth 2 edges))))) 84 (same-window-p (eq bg-mouse-window bg-cursor-window)) 85 (in-minibuf-p (and minibuf-p 86 (not bg-mouse-window))) ;minibuf must be inactive 87 (bg-mode-bits (+ (if in-minibuf-p bg-in-minibuf 0) 88 (if in-modeline-p bg-in-modeline 0) 89 (if in-scrollbar-p bg-in-scrollbar 0))) 90 (bg-command 91 (lookup-key mouse-map 92 (char-to-string (+ bg-mode-bits bg-mouse-buttons)))) 93 (bg-mouse-x (- screen-mouse-x (nth 0 edges))) 94 (bg-mouse-y (- screen-mouse-y (nth 1 edges)))) 95 (cond ((or in-modeline-p in-scrollbar-p) 96 (select-window bg-mouse-window) 97 (bg-command-execute bg-command) 98 (select-window bg-cursor-window)) 99 ((or same-window-p in-minibuf-p) 100 (bg-command-execute bg-command)) 101 (t ;in another window 102 (select-window bg-mouse-window) 103 (if bg-mouse-fast-select-window 104 (bg-command-execute bg-command))) 105 ))) 106 107 108;;; Library of commands: 109 110(defun bg-set-point () 111 "Move point to location of BitGraph mouse." 112 (interactive) 113 (bg-move-point-to-x-y bg-mouse-x bg-mouse-y) 114 (setq this-command 'next-line) ;make subsequent line moves work 115 (setq temporary-goal-column bg-mouse-x)) 116 117(defun bg-set-mark () 118 "Set mark at location of BitGraph mouse." 119 (interactive) 120 (push-mark) 121 (bg-move-point-to-x-y bg-mouse-x bg-mouse-y) 122 (exchange-point-and-mark)) 123 124(defun bg-yank () 125 "Move point to location of BitGraph mouse and yank." 126 (interactive "*") 127 (bg-move-point-to-x-y bg-mouse-x bg-mouse-y) 128 (setq this-command 'yank) 129 (yank)) 130 131(defun yank-pop-1 () 132 (interactive "*") 133 (yank-pop 1)) 134 135(defun bg-yank-or-pop () 136 "Move point to location of BitGraph mouse and yank. If last command 137was a yank, do a yank-pop." 138 (interactive "*") 139 (if (eql last-command 'yank) 140 (yank-pop 1) 141 (bg-yank))) 142 143;;; In 18.51, Emacs Lisp doesn't provide most-positive-fixnum 144(defconst bg-most-positive-fixnum 8388607) 145 146(defun bg-move-by-percentage () 147 "Go to location in buffer that is the same percentage of the way 148through the buffer as the BitGraph mouse's X position in the window." 149 (interactive) 150 ;; check carefully for overflow in intermediate calculations 151 (goto-char 152 (cond ((zerop bg-mouse-x) 153 0) 154 ((< (buffer-size) (/ bg-most-positive-fixnum bg-mouse-x)) 155 ;; no danger of overflow: compute it exactly 156 (/ (* bg-mouse-x (buffer-size)) 157 (1- (window-width)))) 158 (t 159 ;; overflow possible: approximate 160 (* (/ (buffer-size) (1- (window-width))) 161 bg-mouse-x)))) 162 (beginning-of-line) 163 (what-cursor-position)) 164 165(defun bg-mouse-line-to-top () 166 "Scroll the line pointed to by the BitGraph mouse to the top of the window." 167 (interactive) 168 (scroll-up bg-mouse-y)) 169 170(defun bg-mouse-line-to-center () 171 "Scroll the line pointed to by the BitGraph mouse to the center 172of the window" 173 (interactive) 174 (scroll-up (/ (+ 2 bg-mouse-y bg-mouse-y (- (window-height))) 2))) 175 176(defun bg-mouse-line-to-bottom () 177 "Scroll the line pointed to by the mouse to the bottom of the window." 178 (interactive) 179 (scroll-up (+ bg-mouse-y (- 2 (window-height))))) 180 181(defun bg-kill-region () 182 (interactive "*") 183 (kill-region (region-beginning) (region-end))) 184 185(defun bg-insert-moused-sexp () 186 "Insert a copy of the word (actually sexp) that the mouse is pointing at. 187Sexp is inserted into the buffer at point (where the text cursor is)." 188 (interactive) 189 (let ((moused-text 190 (save-excursion 191 (bg-move-point-to-x-y bg-mouse-x bg-mouse-y) 192 (if (looking-at "\\s)") 193 (forward-char 1) 194 (forward-sexp 1)) 195 (buffer-substring (save-excursion (backward-sexp 1) (point)) 196 (point))))) 197 (select-window bg-cursor-window) 198 (delete-horizontal-space) 199 (cond 200 ((bolp) 201 (indent-according-to-mode)) 202 ;; In Lisp assume double-quote is closing; in Text assume opening. 203 ;; Why? Because it does the right thing most often. 204 ((save-excursion (forward-char -1) 205 (and (not (looking-at "\\s\"")) 206 (looking-at "[`'\"\\]\\|\\s("))) 207 nil) 208 (t 209 (insert-string " "))) 210 (insert-string moused-text) 211 (or (eolp) 212 (looking-at "\\s.\\|\\s)") 213 (and (looking-at "'") (looking-at "\\sw")) ;hack for text mode 214 (save-excursion (insert-string " "))))) 215 216;;; Utility functions: 217 218(defun bg-get-tty-num (term-char) 219 "Read from terminal until TERM-CHAR is read, and return intervening number. 220If non-numeric not matching TERM-CHAR, reprogram the mouse and signal an error." 221 (let 222 ((num 0) 223 (char (- (read-char) 48))) 224 (while (and (>= char 0) 225 (<= char 9)) 226 (setq num (+ (* num 10) char)) 227 (setq char (- (read-char) 48))) 228 (or (eq term-char (+ char 48)) 229 (progn 230 (bg-program-mouse) 231 (error 232 "Invalid data format in bg-mouse command: mouse reinitialized."))) 233 num)) 234 235;;; Note that this fails in the minibuf because move-to-column doesn't 236;;; allow for the width of the prompt. 237(defun bg-move-point-to-x-y (x y) 238 "Position cursor in window coordinates. 239X and Y are 0-based character positions in the window." 240 (move-to-window-line y) 241 ;; if not on a wrapped line, zero-column will be 0 242 (let ((zero-column (current-column)) 243 (scroll-offset (window-hscroll))) 244 ;; scrolling takes up column 0 to display the $ 245 (if (> scroll-offset 0) 246 (setq scroll-offset (1- scroll-offset))) 247 (move-to-column (+ zero-column scroll-offset x)) 248 )) 249 250;;; Returns the window that screen position (x, y) is in or nil if none, 251;;; meaning we are in the echo area with a non-active minibuffer. 252;;; If coordinates-in-window-p were not in an X-windows-specific file 253;;; we could use that. In Emacs 19 can even use locate-window-from-coordinates 254(defun bg-window-from-x-y (x y) 255 "Find window corresponding to screen coordinates. 256X and Y are 0-based character positions on the screen." 257 (let ((edges (window-edges)) 258 (window nil)) 259 (while (and (not (eq window (selected-window))) 260 (or (< y (nth 1 edges)) 261 (>= y (nth 3 edges)) 262 (< x (nth 0 edges)) 263 (>= x (nth 2 edges)))) 264 (setq window (next-window window)) 265 (setq edges (window-edges window))) 266 (cond ((eq window (selected-window)) 267 nil) ;we've looped: not found 268 ((not window) 269 (selected-window)) ;just starting: current window 270 (t 271 window)) 272 )) 273 274(defun bg-command-execute (bg-command) 275 (if (commandp bg-command) 276 (command-execute bg-command) 277 (ding))) 278 279(defun bg-program-mouse () 280 (send-string-to-terminal "\e:0;7;;;360;512;9;16;9;16c")) 281 282;;; Note that the doc string for mouse-map (as defined in subr.el) 283;;; says it is for the X-window mouse. This is wrong; that keymap 284;;; should be used for your mouse no matter what terminal you have. 285 286(or (keymapp mouse-map) 287 (setq mouse-map (make-keymap))) 288 289(defun bind-bg-mouse-click (click-code function) 290 "Bind bg-mouse CLICK-CODE to run FUNCTION." 291 (define-key mouse-map (char-to-string click-code) function)) 292 293(bind-bg-mouse-click bg-button-l 'bg-set-point) 294(bind-bg-mouse-click bg-button-m 'bg-yank) 295(bind-bg-mouse-click bg-button-r 'bg-set-mark) 296(bind-bg-mouse-click (+ bg-button-l bg-button-m) 'yank-pop-1) 297(bind-bg-mouse-click (+ bg-button-l bg-button-r) 'bg-kill-region) 298(bind-bg-mouse-click (+ bg-button-m bg-button-r) 'undo) 299(bind-bg-mouse-click (+ bg-button-l bg-button-m bg-button-r) 'undo) 300(bind-bg-mouse-click (+ bg-in-modeline bg-button-l) 'scroll-up) 301(bind-bg-mouse-click (+ bg-in-modeline bg-button-m) 'bg-move-by-percentage) 302(bind-bg-mouse-click (+ bg-in-modeline bg-button-r) 'scroll-down) 303(bind-bg-mouse-click (+ bg-in-scrollbar bg-button-l) 'bg-mouse-line-to-top) 304(bind-bg-mouse-click (+ bg-in-scrollbar bg-button-m) 'bg-mouse-line-to-center) 305(bind-bg-mouse-click (+ bg-in-scrollbar bg-button-r) 'bg-mouse-line-to-bottom) 306(bind-bg-mouse-click (+ bg-in-minibuf bg-button-l) 'execute-extended-command) 307(bind-bg-mouse-click (+ bg-in-minibuf bg-button-m) 'suspend-emacs) 308(bind-bg-mouse-click (+ bg-in-minibuf bg-button-r) 'eval-expression) 309 310(provide 'bg-mouse) 311 312;;; bg-mouse.el ends here 313