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