|
0
|
1 ;;; tpu-extras.el --- Scroll margins and free cursor mode for TPU-edt
|
|
|
2
|
|
72
|
3 ;; Copyright (C) 1993, 1994, 1995 Free Software Foundation, Inc.
|
|
0
|
4
|
|
|
5 ;; Author: Rob Riepel <riepel@networking.stanford.edu>
|
|
|
6 ;; Maintainer: Rob Riepel <riepel@networking.stanford.edu>
|
|
|
7 ;; Keywords: emulations
|
|
|
8
|
|
|
9 ;; This file is part of XEmacs.
|
|
|
10
|
|
|
11 ;; XEmacs is free software; you can redistribute it and/or modify it
|
|
|
12 ;; under the terms of the GNU General Public License as published by
|
|
|
13 ;; the Free Software Foundation; either version 2, or (at your option)
|
|
|
14 ;; any later version.
|
|
|
15
|
|
|
16 ;; XEmacs is distributed in the hope that it will be useful, but
|
|
|
17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
19 ;; General Public License for more details.
|
|
|
20
|
|
|
21 ;; You should have received a copy of the GNU General Public License
|
|
|
22 ;; along with XEmacs; see the file COPYING. If not, write to the Free
|
|
72
|
23 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
|
|
|
24 ;; 02111-1307, USA.
|
|
|
25
|
|
|
26 ;;; Synched up with: FSF 19.34
|
|
0
|
27
|
|
|
28 ;;; Commentary:
|
|
|
29
|
|
72
|
30 ;; Use the functions defined here to customize TPU-edt to your tastes by
|
|
|
31 ;; setting scroll margins and/or turning on free cursor mode. Here's an
|
|
|
32 ;; example for your .emacs file.
|
|
|
33
|
|
|
34 ;; (tpu-set-cursor-free) ; Set cursor free.
|
|
|
35 ;; (tpu-set-scroll-margins "10%" "15%") ; Set scroll margins.
|
|
|
36
|
|
|
37 ;; Scroll margins and cursor binding can be changed from within emacs using
|
|
|
38 ;; the following commands:
|
|
|
39
|
|
|
40 ;; tpu-set-scroll-margins or set scroll margins
|
|
|
41 ;; tpu-set-cursor-bound or set cursor bound
|
|
|
42 ;; tpu-set-cursor-free or set cursor free
|
|
|
43
|
|
|
44 ;; Additionally, Gold-F toggles between bound and free cursor modes.
|
|
|
45
|
|
|
46 ;; Note that switching out of free cursor mode or exiting TPU-edt while in
|
|
|
47 ;; free cursor mode strips trailing whitespace from every line in the file.
|
|
|
48
|
|
|
49
|
|
|
50 ;;; Details:
|
|
|
51
|
|
0
|
52 ;; The functions contained in this file implement scroll margins and free
|
|
|
53 ;; cursor mode. The following keys and commands are affected.
|
|
|
54
|
|
|
55 ;; key/command function scroll cursor
|
|
|
56
|
|
|
57 ;; Up-Arrow previous line x x
|
|
|
58 ;; Down-Arrow next line x x
|
|
|
59 ;; Right-Arrow next character x
|
|
|
60 ;; Left-Arrow previous character x
|
|
|
61 ;; KP0 next or previous line x
|
|
|
62 ;; KP7 next or previous page x
|
|
|
63 ;; KP8 next or previous screen x
|
|
|
64 ;; KP2 next or previous end-of-line x x
|
|
|
65 ;; Control-e current end-of-line x
|
|
|
66 ;; Control-h previous beginning-of-line x
|
|
|
67 ;; Next Scr next screen x
|
|
|
68 ;; Prev Scr previous screen x
|
|
|
69 ;; Search find a string x
|
|
|
70 ;; Replace find and replace a string x
|
|
|
71 ;; Newline insert a newline x
|
|
|
72 ;; Paragraph next or previous paragraph x
|
|
|
73 ;; Auto-Fill break lines on spaces x
|
|
|
74
|
|
|
75 ;; These functions are not part of the base TPU-edt for the following
|
|
|
76 ;; reasons:
|
|
|
77
|
|
|
78 ;; Free cursor mode is implemented with the emacs picture-mode functions.
|
|
|
79 ;; These functions support moving the cursor all over the screen, however,
|
|
|
80 ;; when the cursor is moved past the end of a line, spaces or tabs are
|
|
|
81 ;; appended to the line - even if no text is entered in that area. In
|
|
|
82 ;; order for a free cursor mode to work exactly like TPU/edt, this trailing
|
|
|
83 ;; whitespace needs to be dealt with in every function that might encounter
|
|
|
84 ;; it. Such global changes are impractical, however, free cursor mode is
|
|
|
85 ;; too valuable to abandon completely, so it has been implemented in those
|
|
|
86 ;; functions where it serves best.
|
|
|
87
|
|
|
88 ;; The implementation of scroll margins adds overhead to previously
|
|
|
89 ;; simple and often used commands. These commands are now responsible
|
|
|
90 ;; for their normal operation and part of the display function. There
|
|
|
91 ;; is a possibility that this display overhead could adversely affect the
|
|
|
92 ;; performance of TPU-edt on slower computers. In order to support the
|
|
|
93 ;; widest range of computers, scroll margin support is optional.
|
|
|
94
|
|
72
|
95 ;; It's actually not known whether the overhead associated with scroll
|
|
|
96 ;; margin support is significant. If you find that it is, please send
|
|
0
|
97 ;; a note describing the extent of the performance degradation. Be sure
|
|
|
98 ;; to include a description of the platform where you're running TPU-edt.
|
|
|
99 ;; Send your note to the address provided by Gold-V.
|
|
|
100
|
|
|
101 ;; Even with these differences and limitations, these functions implement
|
|
|
102 ;; important aspects of the real TPU/edt. Those who miss free cursor mode
|
|
|
103 ;; and/or scroll margins will appreciate these implementations.
|
|
|
104
|
|
72
|
105 ;; NOTE: There was a very old tpu-edt in XEmacs 19.14 so I deleted it and
|
|
|
106 ;; replaced it with the one in Emacs 19.34. -sb
|
|
0
|
107
|
|
|
108 ;;; Code:
|
|
|
109
|
|
|
110
|
|
72
|
111 ;;; Gotta have tpu-edt
|
|
0
|
112
|
|
72
|
113 (require 'tpu-edt)
|
|
0
|
114
|
|
|
115
|
|
|
116 ;;; Customization variables
|
|
|
117
|
|
|
118 (defconst tpu-top-scroll-margin 0
|
|
|
119 "*Scroll margin at the top of the screen.
|
|
|
120 Interpreted as a percent of the current window size.")
|
|
|
121 (defconst tpu-bottom-scroll-margin 0
|
|
|
122 "*Scroll margin at the bottom of the screen.
|
|
|
123 Interpreted as a percent of the current window size.")
|
|
|
124
|
|
|
125 (defvar tpu-backward-char-like-tpu t
|
|
|
126 "*If non-nil, in free cursor mode backward-char (left-arrow) works
|
|
|
127 just like TPU/edt. Otherwise, backward-char will move to the end of
|
|
|
128 the previous line when starting from a line beginning.")
|
|
|
129
|
|
|
130
|
|
|
131 ;;; Global variables
|
|
|
132
|
|
|
133 (defvar tpu-cursor-free nil
|
|
|
134 "If non-nil, let the cursor roam free.")
|
|
|
135
|
|
|
136
|
|
|
137 ;;; Hooks -- Set cursor free in picture mode.
|
|
|
138 ;;; Clean up when writing a file from cursor free mode.
|
|
|
139
|
|
72
|
140 (add-hook 'picture-mode-hook 'tpu-set-cursor-free)
|
|
0
|
141
|
|
|
142 (defun tpu-write-file-hook nil
|
|
|
143 "Eliminate whitespace at ends of lines, if the cursor is free."
|
|
|
144 (if (and (buffer-modified-p) tpu-cursor-free) (picture-clean)))
|
|
|
145
|
|
|
146 (or (memq 'tpu-write-file-hook write-file-hooks)
|
|
|
147 (setq write-file-hooks
|
|
|
148 (cons 'tpu-write-file-hook write-file-hooks)))
|
|
|
149
|
|
|
150
|
|
|
151 ;;; Utility routines for implementing scroll margins
|
|
|
152
|
|
|
153 (defun tpu-top-check (beg lines)
|
|
|
154 "Enforce scroll margin at the top of screen."
|
|
|
155 (let ((margin (/ (* (window-height) tpu-top-scroll-margin) 100)))
|
|
|
156 (cond ((< beg margin) (recenter beg))
|
|
|
157 ((< (- beg lines) margin) (recenter margin)))))
|
|
|
158
|
|
|
159 (defun tpu-bottom-check (beg lines)
|
|
|
160 "Enforce scroll margin at the bottom of screen."
|
|
|
161 (let* ((height (window-height))
|
|
|
162 (margin (+ 1 (/ (* height tpu-bottom-scroll-margin) 100)))
|
|
|
163 ;; subtract 1 from height because it includes mode line
|
|
|
164 (difference (- height margin 1)))
|
|
|
165 (cond ((> beg difference) (recenter beg))
|
|
|
166 ((> (+ beg lines) difference) (recenter (- margin))))))
|
|
|
167
|
|
|
168
|
|
|
169 ;;; Movement by character
|
|
|
170
|
|
|
171 (defun tpu-forward-char (num)
|
|
|
172 "Move right ARG characters (left if ARG is negative)."
|
|
|
173 (interactive "p")
|
|
|
174 (if tpu-cursor-free (picture-forward-column num) (forward-char num)))
|
|
|
175
|
|
|
176 (defun tpu-backward-char (num)
|
|
|
177 "Move left ARG characters (right if ARG is negative)."
|
|
|
178 (interactive "p")
|
|
|
179 (cond ((not tpu-cursor-free)
|
|
|
180 (backward-char num))
|
|
|
181 (tpu-backward-char-like-tpu
|
|
|
182 (picture-backward-column num))
|
|
|
183 ((bolp)
|
|
|
184 (backward-char 1)
|
|
|
185 (picture-end-of-line)
|
|
|
186 (picture-backward-column (1- num)))
|
|
|
187 (t
|
|
|
188 (picture-backward-column num))))
|
|
|
189
|
|
|
190
|
|
|
191 ;;; Movement by line
|
|
|
192
|
|
|
193 (defun tpu-next-line (num)
|
|
|
194 "Move to next line.
|
|
|
195 Prefix argument serves as a repeat count."
|
|
|
196 (interactive "p")
|
|
|
197 (let ((beg (tpu-current-line)))
|
|
|
198 (if tpu-cursor-free (or (eobp) (picture-move-down num))
|
|
|
199 (next-line-internal num))
|
|
|
200 (tpu-bottom-check beg num)
|
|
|
201 (setq this-command 'next-line)))
|
|
|
202
|
|
|
203 (defun tpu-previous-line (num)
|
|
|
204 "Move to previous line.
|
|
|
205 Prefix argument serves as a repeat count."
|
|
|
206 (interactive "p")
|
|
|
207 (let ((beg (tpu-current-line)))
|
|
|
208 (if tpu-cursor-free (picture-move-up num) (next-line-internal (- num)))
|
|
|
209 (tpu-top-check beg num)
|
|
|
210 (setq this-command 'previous-line)))
|
|
|
211
|
|
|
212 (defun tpu-next-beginning-of-line (num)
|
|
|
213 "Move to beginning of line; if at beginning, move to beginning of next line.
|
|
|
214 Accepts a prefix argument for the number of lines to move."
|
|
|
215 (interactive "p")
|
|
|
216 (let ((beg (tpu-current-line)))
|
|
|
217 (backward-char 1)
|
|
|
218 (forward-line (- 1 num))
|
|
|
219 (tpu-top-check beg num)))
|
|
|
220
|
|
|
221 (defun tpu-next-end-of-line (num)
|
|
|
222 "Move to end of line; if at end, move to end of next line.
|
|
|
223 Accepts a prefix argument for the number of lines to move."
|
|
|
224 (interactive "p")
|
|
|
225 (let ((beg (tpu-current-line)))
|
|
|
226 (cond (tpu-cursor-free
|
|
|
227 (let ((beg (point)))
|
|
|
228 (if (< 1 num) (forward-line num))
|
|
|
229 (picture-end-of-line)
|
|
|
230 (if (<= (point) beg) (progn (forward-line) (picture-end-of-line)))))
|
|
|
231 (t
|
|
|
232 (forward-char)
|
|
|
233 (end-of-line num)))
|
|
|
234 (tpu-bottom-check beg num)))
|
|
|
235
|
|
|
236 (defun tpu-previous-end-of-line (num)
|
|
|
237 "Move EOL upward.
|
|
|
238 Accepts a prefix argument for the number of lines to move."
|
|
|
239 (interactive "p")
|
|
|
240 (let ((beg (tpu-current-line)))
|
|
|
241 (cond (tpu-cursor-free
|
|
|
242 (picture-end-of-line (- 1 num)))
|
|
|
243 (t
|
|
|
244 (end-of-line (- 1 num))))
|
|
|
245 (tpu-top-check beg num)))
|
|
|
246
|
|
|
247 (defun tpu-current-end-of-line nil
|
|
|
248 "Move point to end of current line."
|
|
|
249 (interactive)
|
|
|
250 (let ((beg (point)))
|
|
|
251 (if tpu-cursor-free (picture-end-of-line) (end-of-line))
|
|
|
252 (if (= beg (point)) (message "You are already at the end of a line."))))
|
|
|
253
|
|
|
254 (defun tpu-forward-line (num)
|
|
|
255 "Move to beginning of next line.
|
|
|
256 Prefix argument serves as a repeat count."
|
|
|
257 (interactive "p")
|
|
|
258 (let ((beg (tpu-current-line)))
|
|
|
259 (next-line-internal num)
|
|
|
260 (tpu-bottom-check beg num)
|
|
|
261 (beginning-of-line)))
|
|
|
262
|
|
|
263 (defun tpu-backward-line (num)
|
|
|
264 "Move to beginning of previous line.
|
|
|
265 Prefix argument serves as repeat count."
|
|
|
266 (interactive "p")
|
|
|
267 (let ((beg (tpu-current-line)))
|
|
72
|
268 (or (bolp) (>= 0 num) (setq num (- num 1)))
|
|
0
|
269 (next-line-internal (- num))
|
|
|
270 (tpu-top-check beg num)
|
|
|
271 (beginning-of-line)))
|
|
|
272
|
|
|
273
|
|
|
274 ;;; Movement by paragraph
|
|
|
275
|
|
|
276 (defun tpu-paragraph (num)
|
|
|
277 "Move to the next paragraph in the current direction.
|
|
|
278 A repeat count means move that many paragraphs."
|
|
|
279 (interactive "p")
|
|
|
280 (let* ((left nil)
|
|
|
281 (beg (tpu-current-line))
|
|
|
282 (height (window-height))
|
|
|
283 (top-percent
|
|
|
284 (if (= 0 tpu-top-scroll-margin) 10 tpu-top-scroll-margin))
|
|
|
285 (bottom-percent
|
|
|
286 (if (= 0 tpu-bottom-scroll-margin) 15 tpu-bottom-scroll-margin))
|
|
|
287 (top-margin (/ (* height top-percent) 100))
|
|
|
288 (bottom-up-margin (+ 1 (/ (* height bottom-percent) 100)))
|
|
|
289 (bottom-margin (max beg (- height bottom-up-margin 1)))
|
|
|
290 (top (save-excursion (move-to-window-line top-margin) (point)))
|
|
|
291 (bottom (save-excursion (move-to-window-line bottom-margin) (point)))
|
|
|
292 (far (save-excursion
|
|
|
293 (goto-char bottom) (forward-line (- height 2)) (point))))
|
|
|
294 (cond (tpu-advance
|
|
|
295 (tpu-next-paragraph num)
|
|
|
296 (cond((> (point) far)
|
|
|
297 (setq left (save-excursion (forward-line height)))
|
|
|
298 (if (= 0 left) (recenter top-margin)
|
|
|
299 (recenter (- left bottom-up-margin))))
|
|
|
300 (t
|
|
|
301 (and (> (point) bottom) (recenter bottom-margin)))))
|
|
|
302 (t
|
|
|
303 (tpu-previous-paragraph num)
|
|
|
304 (and (< (point) top) (recenter (min beg top-margin)))))))
|
|
|
305
|
|
|
306
|
|
|
307 ;;; Movement by page
|
|
|
308
|
|
|
309 (defun tpu-page (num)
|
|
|
310 "Move to the next page in the current direction.
|
|
|
311 A repeat count means move that many pages."
|
|
|
312 (interactive "p")
|
|
|
313 (let* ((left nil)
|
|
|
314 (beg (tpu-current-line))
|
|
|
315 (height (window-height))
|
|
|
316 (top-percent
|
|
|
317 (if (= 0 tpu-top-scroll-margin) 10 tpu-top-scroll-margin))
|
|
|
318 (bottom-percent
|
|
|
319 (if (= 0 tpu-bottom-scroll-margin) 15 tpu-bottom-scroll-margin))
|
|
|
320 (top-margin (/ (* height top-percent) 100))
|
|
|
321 (bottom-up-margin (+ 1 (/ (* height bottom-percent) 100)))
|
|
|
322 (bottom-margin (max beg (- height bottom-up-margin 1)))
|
|
|
323 (top (save-excursion (move-to-window-line top-margin) (point)))
|
|
|
324 (bottom (save-excursion (move-to-window-line bottom-margin) (point)))
|
|
|
325 (far (save-excursion
|
|
|
326 (goto-char bottom) (forward-line (- height 2)) (point))))
|
|
|
327 (cond (tpu-advance
|
|
|
328 (forward-page num)
|
|
|
329 (cond((> (point) far)
|
|
|
330 (setq left (save-excursion (forward-line height)))
|
|
|
331 (if (= 0 left) (recenter top-margin)
|
|
|
332 (recenter (- left bottom-up-margin))))
|
|
|
333 (t
|
|
|
334 (and (> (point) bottom) (recenter bottom-margin)))))
|
|
|
335 (t
|
|
|
336 (backward-page num)
|
|
|
337 (and (< (point) top) (recenter (min beg top-margin)))))))
|
|
|
338
|
|
|
339
|
|
|
340 ;;; Scrolling
|
|
|
341
|
|
|
342 (defun tpu-scroll-window-down (num)
|
|
|
343 "Scroll the display down to the next section.
|
|
|
344 A repeat count means scroll that many sections."
|
|
|
345 (interactive "p")
|
|
|
346 (let* ((beg (tpu-current-line))
|
|
|
347 (height (1- (window-height)))
|
|
|
348 (lines (* num (/ (* height tpu-percent-scroll) 100))))
|
|
|
349 (next-line-internal (- lines))
|
|
|
350 (tpu-top-check beg lines)))
|
|
|
351
|
|
|
352 (defun tpu-scroll-window-up (num)
|
|
|
353 "Scroll the display up to the next section.
|
|
|
354 A repeat count means scroll that many sections."
|
|
|
355 (interactive "p")
|
|
|
356 (let* ((beg (tpu-current-line))
|
|
|
357 (height (1- (window-height)))
|
|
|
358 (lines (* num (/ (* height tpu-percent-scroll) 100))))
|
|
|
359 (next-line-internal lines)
|
|
|
360 (tpu-bottom-check beg lines)))
|
|
|
361
|
|
|
362
|
|
|
363 ;;; Replace the TPU-edt internal search function
|
|
|
364
|
|
|
365 (defun tpu-search-internal (pat &optional quiet)
|
|
|
366 "Search for a string or regular expression."
|
|
|
367 (let* ((left nil)
|
|
|
368 (beg (tpu-current-line))
|
|
|
369 (height (window-height))
|
|
|
370 (top-percent
|
|
|
371 (if (= 0 tpu-top-scroll-margin) 10 tpu-top-scroll-margin))
|
|
|
372 (bottom-percent
|
|
|
373 (if (= 0 tpu-bottom-scroll-margin) 15 tpu-bottom-scroll-margin))
|
|
|
374 (top-margin (/ (* height top-percent) 100))
|
|
|
375 (bottom-up-margin (+ 1 (/ (* height bottom-percent) 100)))
|
|
|
376 (bottom-margin (max beg (- height bottom-up-margin 1)))
|
|
|
377 (top (save-excursion (move-to-window-line top-margin) (point)))
|
|
|
378 (bottom (save-excursion (move-to-window-line bottom-margin) (point)))
|
|
|
379 (far (save-excursion
|
|
|
380 (goto-char bottom) (forward-line (- height 2)) (point))))
|
|
|
381 (tpu-search-internal-core pat quiet)
|
|
|
382 (if tpu-searching-forward
|
|
|
383 (cond((> (point) far)
|
|
|
384 (setq left (save-excursion (forward-line height)))
|
|
|
385 (if (= 0 left) (recenter top-margin)
|
|
|
386 (recenter (- left bottom-up-margin))))
|
|
|
387 (t
|
|
|
388 (and (> (point) bottom) (recenter bottom-margin))))
|
|
|
389 (and (< (point) top) (recenter (min beg top-margin))))))
|
|
|
390
|
|
|
391
|
|
|
392
|
|
|
393 ;;; Replace the newline, newline-and-indent, and do-auto-fill functions
|
|
|
394
|
|
|
395 (or (fboundp 'tpu-old-newline)
|
|
|
396 (fset 'tpu-old-newline (symbol-function 'newline)))
|
|
|
397 (or (fboundp 'tpu-old-do-auto-fill)
|
|
|
398 (fset 'tpu-old-do-auto-fill (symbol-function 'do-auto-fill)))
|
|
|
399 (or (fboundp 'tpu-old-newline-and-indent)
|
|
|
400 (fset 'tpu-old-newline-and-indent (symbol-function 'newline-and-indent)))
|
|
|
401
|
|
|
402 (defun newline (&optional num)
|
|
|
403 "Insert a newline. With arg, insert that many newlines.
|
|
|
404 In Auto Fill mode, can break the preceding line if no numeric arg.
|
|
|
405 This is the TPU-edt version that respects the bottom scroll margin."
|
|
|
406 (interactive "p")
|
|
|
407 (let ((beg (tpu-current-line)))
|
|
|
408 (or num (setq num 1))
|
|
|
409 (tpu-old-newline num)
|
|
|
410 (tpu-bottom-check beg num)))
|
|
|
411
|
|
|
412 (defun newline-and-indent nil
|
|
|
413 "Insert a newline, then indent according to major mode.
|
|
|
414 Indentation is done using the current indent-line-function.
|
|
|
415 In programming language modes, this is the same as TAB.
|
|
|
416 In some text modes, where TAB inserts a tab, this indents
|
|
|
417 to the specified left-margin column. This is the TPU-edt
|
|
|
418 version that respects the bottom scroll margin."
|
|
|
419 (interactive)
|
|
|
420 (let ((beg (tpu-current-line)))
|
|
|
421 (tpu-old-newline-and-indent)
|
|
|
422 (tpu-bottom-check beg 1)))
|
|
|
423
|
|
|
424 (defun do-auto-fill nil
|
|
|
425 "TPU-edt version that respects the bottom scroll margin."
|
|
|
426 (let ((beg (tpu-current-line)))
|
|
|
427 (tpu-old-do-auto-fill)
|
|
|
428 (tpu-bottom-check beg 1)))
|
|
|
429
|
|
|
430
|
|
|
431 ;;; Function to set scroll margins
|
|
|
432
|
|
72
|
433 ;;;###autoload
|
|
0
|
434 (defun tpu-set-scroll-margins (top bottom)
|
|
|
435 "Set scroll margins."
|
|
|
436 (interactive
|
|
|
437 "sEnter top scroll margin (N lines or N%% or RETURN for current value): \
|
|
|
438 \nsEnter bottom scroll margin (N lines or N%% or RETURN for current value): ")
|
|
|
439 ;; set top scroll margin
|
|
|
440 (or (string= top "")
|
|
|
441 (if (string= "%" (substring top -1))
|
|
|
442 (setq tpu-top-scroll-margin (string-to-int top))
|
|
|
443 (setq tpu-top-scroll-margin
|
|
|
444 (/ (1- (+ (* (string-to-int top) 100) (window-height)))
|
|
|
445 (window-height)))))
|
|
|
446 ;; set bottom scroll margin
|
|
|
447 (or (string= bottom "")
|
|
|
448 (if (string= "%" (substring bottom -1))
|
|
|
449 (setq tpu-bottom-scroll-margin (string-to-int bottom))
|
|
|
450 (setq tpu-bottom-scroll-margin
|
|
|
451 (/ (1- (+ (* (string-to-int bottom) 100) (window-height)))
|
|
|
452 (window-height)))))
|
|
|
453 ;; report scroll margin settings if running interactively
|
|
|
454 (and (interactive-p)
|
|
|
455 (message "Scroll margins set. Top = %s%%, Bottom = %s%%"
|
|
|
456 tpu-top-scroll-margin tpu-bottom-scroll-margin)))
|
|
|
457
|
|
|
458
|
|
|
459 ;;; Functions to set cursor bound or free
|
|
|
460
|
|
72
|
461 ;;;###autoload
|
|
0
|
462 (defun tpu-set-cursor-free nil
|
|
|
463 "Allow the cursor to move freely about the screen."
|
|
|
464 (interactive)
|
|
|
465 (setq tpu-cursor-free t)
|
|
|
466 (substitute-key-definition 'tpu-set-cursor-free
|
|
|
467 'tpu-set-cursor-bound
|
|
|
468 GOLD-map)
|
|
|
469 (message "The cursor will now move freely about the screen."))
|
|
|
470
|
|
72
|
471 ;;;###autoload
|
|
0
|
472 (defun tpu-set-cursor-bound nil
|
|
|
473 "Constrain the cursor to the flow of the text."
|
|
|
474 (interactive)
|
|
|
475 (picture-clean)
|
|
|
476 (setq tpu-cursor-free nil)
|
|
|
477 (substitute-key-definition 'tpu-set-cursor-bound
|
|
|
478 'tpu-set-cursor-free
|
|
|
479 GOLD-map)
|
|
|
480 (message "The cursor is now bound to the flow of your text."))
|
|
|
481
|
|
|
482 ;;; tpu-extras.el ends here
|
