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1.1 root 1: ;; Parse switches controlling how Emacs interfaces with X window system.
2: ;; Copyright (C) 1986, 1988 Free Software Foundation, Inc.
3:
4: ;; This file is part of GNU Emacs.
5:
6: ;; GNU Emacs is free software; you can redistribute it and/or modify
7: ;; it under the terms of the GNU General Public License as published by
8: ;; the Free Software Foundation; either version 1, or (at your option)
9: ;; any later version.
10:
11: ;; GNU Emacs is distributed in the hope that it will be useful,
12: ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
13: ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14: ;; GNU General Public License for more details.
15:
16: ;; You should have received a copy of the GNU General Public License
17: ;; along with GNU Emacs; see the file COPYING. If not, write to
18: ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
19:
20: (defconst window-system-version window-system-version
21: "*Window system version number now in use.")
22:
23: (defvar x-sigio-bug nil
24: "Non-NIL means don't use interrupts for input when using X.")
25:
26: (defvar x-processed-defaults nil
27: "Non-NIL means that user's X defaults have already been processed.")
28:
29: (defvar x-switches nil
30: "Alist of command switches and values for X window system interface.
31: You can set this in your init file, if you want some defaults
32: for these switches. Example:
33: (setq x-switches '((\"-r\" . t) (\"-font\" . \"foo\") (\"-b\" . \"8\")))
34: This feature is currently broken for X11.")
35:
36: (if (= window-system-version 10)
37: (setq command-switch-alist
38: (append '(("-r" . x-handle-switch)
39: ("-i" . x-handle-switch)
40: ("-font" . x-handle-switch)
41: ("-w" . x-handle-switch)
42: ("-b" . x-handle-switch)
43: ("-ib" . x-handle-switch)
44: ("-fg" . x-handle-switch)
45: ("-bg" . x-handle-switch)
46: ("-bd" . x-handle-switch)
47: ("-cr" . x-handle-switch)
48: ("-ms" . x-handle-switch))
49: command-switch-alist))
50: (setq command-switch-alist
51: (append '(("-rn" . x-ignore-arg)
52: ("-xrm" . x-ignore-arg)
53: ("-r" . ignore)
54: ("-i" . ignore)
55: ("-rn" . x-ignore-arg)
56: ("-font" . x-ignore-arg)
57: ("-fn" . x-ignore-arg)
58: ("-wn" . x-ignore-arg)
59: ("-in" . x-ignore-arg)
60: ("-w" . x-ignore-arg)
61: ("-geometry" . x-ignore-arg)
62: ("-b" . x-ignore-arg)
63: ("-ib" . x-ignore-arg)
64: ("-fg" . x-ignore-arg)
65: ("-bg" . x-ignore-arg)
66: ("-bd" . x-ignore-arg)
67: ("-cr" . x-ignore-arg)
68: ("-ms" . x-ignore-arg))
69: command-switch-alist)))
70:
71: (defun x-ignore-arg (&rest ignore)
72: (setq command-line-args-left (cdr command-line-args-left)))
73:
74: ;; This is run after the command args are parsed.
75: (defun x-handle-switch (switch)
76: (if (x-handle-switch-1 switch (car command-line-args-left))
77: (setq command-line-args-left (cdr command-line-args-left))))
78:
79: (defun x-handle-switch-1 (switch arg)
80: (cond ((string= switch "-r")
81: (x-flip-color)
82: nil)
83: ((string= switch "-i")
84: (x-set-icon t)
85: nil)
86: ((string= switch "-font")
87: (x-set-font arg)
88: t)
89: ((string= switch "-b")
90: (x-set-border-width (string-to-int arg))
91: t)
92: ((string= switch "-ib")
93: (x-set-internal-border-width (string-to-int arg))
94: t)
95: ((string= switch "-w")
96: (x-create-x-window arg)
97: t)
98: ((string= switch "-fg")
99: (x-set-foreground-color arg)
100: t)
101: ((string= switch "-bg")
102: (x-set-background-color arg)
103: t)
104: ((string= switch "-bd")
105: (x-set-border-color arg)
106: t)
107: ((string= switch "-cr")
108: (x-set-cursor-color arg)
109: t)
110: ((string= switch "-ms")
111: (x-set-mouse-color arg)
112: t)))
113:
114: ;; Convert a string of the form "WWxHH+XO+YO",
115: ;; where WW, HH, XO and YO are numerals,
116: ;; into a list (WW HH XO YO).
117: ;; "xHH" may be omitted; then 0 is used for HH.
118: ;; XO and YO may be preceded by - instead of + to make them negative.
119: ;; Either YO or both XO and YO may be omitted; zero is used.
120: (defun x-parse-edge-spec (arg)
121: (let ((cols-by-font 0)
122: (rows-by-font 0)
123: (xoffset 0)
124: (yoffset 0))
125: (if (string-match "^=" arg)
126: (setq cols-by-font (x-extract-number))
127: (error "Invalid X window size/position spec"))
128: (if (string-match "^x" arg) ;get rows-by-font
129: (setq rows-by-font (x-extract-number)))
130: (if (string-match "^[-+]" arg)
131: (setq xoffset (x-extract-number)))
132: (if (string-match "^[-+]" arg)
133: (setq yoffset (x-extract-number)))
134: (or (equal arg "")
135: (error "Invalid X window size/position spec"))
136: (list cols-by-font rows-by-font xoffset yoffset)))
137:
138: ;; Subroutine to extract the next numeral from the front of arg,
139: ;; returning it and shortening arg to remove its text.
140: ;; If arg is negative, subtract 1 before returning it.
141: (defun x-extract-number ()
142: (if (string-match "^[x=]" arg)
143: (setq arg (substring arg 1)))
144: (or (string-match "[-+]?[0-9]+" arg)
145: (error "Invalid X window size/position spec"))
146: (prog1
147: (+ (string-to-int arg)
148: (if (string-match "^-" arg) -1 0))
149: (setq arg
150: (substring arg
151: (or (string-match "[^0-9]" arg 1)
152: (length arg))))))
153:
154: (defun x-get-default-args ()
155: (setq x-processed-defaults t)
156: (let (value)
157: (if (not (string= (setq value (x-get-default "bodyfont")) ""))
158: (x-handle-switch-1 "-font" value))
159: (if (string-match "on" (x-get-default "bitmapicon"))
160: (x-handle-switch-1 "-i" t))
161: (if (not (string= (setq value (x-get-default "borderwidth")) ""))
162: (x-handle-switch-1 "-b" value))
163: (if (not (string= (setq value (x-get-default "internalborder")) ""))
164: (x-handle-switch-1 "-ib" value))
165: (if (not (string= (setq value (x-get-default "foreground")) ""))
166: (x-handle-switch-1 "-fg" value))
167: (if (not (string= (setq value (x-get-default "background")) ""))
168: (x-handle-switch-1 "-bg" value))
169: (if (not (string= (setq value (x-get-default "border")) ""))
170: (x-handle-switch-1 "-bd" value))
171: (if (not (string= (setq value (x-get-default "cursor")) ""))
172: (x-handle-switch-1 "-cr" value))
173: (if (not (string= (setq value (x-get-default "mouse")) ""))
174: (x-handle-switch-1 "-ms" value))
175: (if (string-match "on" (x-get-default "reversevideo"))
176: (x-handle-switch-1 "-r" t))))
177:
178: ;; So far we have only defined some functions.
179: ;; Now we start processing X-related switches
180: ;; and redefining commands and variables,
181: ;; only if Emacs has been compiled to support direct interface to X.
182:
183: (if (eq window-system 'x)
184: (progn
185: (require 'x-mouse)
186: (if (= window-system-version 10)
187: (progn
188: ;; xterm.c depends on using interrupt-driven input.
189: (set-input-mode t nil)
190:
191: (defun x-new-display (display)
192: "This function takes one argument, the display where you wish to
193: continue your editing session. Your current window will be unmapped and
194: the current display will be closed. The new X display will be opened and
195: the rubber-band outline of the new window will appear on the new X display."
196: (interactive "sDisplay to switch emacs to: ")
197: (x-change-display display)
198: (x-get-default-args))
199:
200: ;; Not defvar! This is not DEFINING this variable, just specifying
201: ;; a value for it.
202: (setq window-setup-hook 'x-pop-up-window)
203:
204: ;; Process switch settings made by .emacs file.
205: (while x-switches
206: (x-handle-switch-1 (car (car x-switches)) (cdr (car x-switches)))
207: (setq x-switches (cdr x-switches)))))
208:
209: ;; On certain systems, turn off use of sigio, because it's broken.
210: (if x-sigio-bug
211: (set-input-mode nil nil))
212:
213: (put 'suspend-emacs 'disabled
214: "Suspending a program running in an X window is silly
215: and you would not be able to start it again. Just switch windows instead.\n")
216: (setq suspend-hook '(lambda () (error "Suspending an emacs running under X makes no sense")))
217: (substitute-key-definition 'suspend-emacs nil global-map)
218: (substitute-key-definition 'suspend-emacs nil esc-map)
219: (substitute-key-definition 'suspend-emacs nil ctl-x-map)
220: ;; Not needed any more -- done in C.
221: ;; (if (not x-processed-defaults) (x-get-default-args))
222: ))
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