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