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comparison lisp/msw-faces.el @ 428:3ecd8885ac67 r21-2-22

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date Mon, 13 Aug 2007 11:28:15 +0200
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1 ;;; msw-faces.el --- mswindows-specific face stuff.
2
3 ;;; Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
4 ;;; Copyright (C) 1995, 1996 Ben Wing.
5
6 ;; Author: Jamie Zawinski
7 ;; Modified by: Chuck Thompson
8 ;; Modified by: Ben Wing
9 ;; Modified by: Martin Buchholz
10 ;; Rewritten for mswindows by: Jonathan Harris
11
12 ;; This file is part of XEmacs.
13
14 ;; XEmacs is free software; you can redistribute it and/or modify it
15 ;; under the terms of the GNU General Public License as published by
16 ;; the Free Software Foundation; either version 2, or (at your option)
17 ;; any later version.
18
19 ;; XEmacs is distributed in the hope that it will be useful, but
20 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
21 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 ;; General Public License for more details.
23
24 ;; You should have received a copy of the GNU General Public License
25 ;; along with XEmacs; see the file COPYING. If not, write to the
26 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
27 ;; Boston, MA 02111-1307, USA.
28
29 ;; This file does the magic to parse mswindows font names, and make sure that
30 ;; the default and modeline attributes of new frames are specified enough.
31
32 ;;; Force creation of the default face font so that if it fails we get an
33 ;;; error now instead of a crash at frame creation.
34 (defun mswindows-init-device-faces (device)
35 (unless (face-font-instance 'default device)
36 (error "Can't find a suitable default font")))
37
38
39 (defun mswindows-init-frame-faces (frame)
40 )
41
42 ;; Other functions expect these regexps
43 (defconst mswindows-font-regexp
44 (let
45 ((- ":")
46 (fontname "\\([a-zA-Z ]+\\)")
47 (weight "\\([a-zA-Z]*\\)?")
48 (style "\\( [a-zA-Z]*\\)?")
49 (pointsize "\\([0-9]+\\)?")
50 (effects "\\([a-zA-Z ]*\\)?")
51 (charset "\\([a-zA-Z 0-9]*\\)")
52 )
53 (concat "^"
54 fontname - weight style - pointsize - effects - charset "$")))
55
56 ;;; Fill in missing parts of a font spec. This is primarily intended as a
57 ;;; helper function for the functions below.
58 ;;; mswindows fonts look like:
59 ;;; fontname[:[weight][ style][:pointsize[:effects]]][:charset]
60 ;;; A minimal mswindows font spec looks like:
61 ;;; Courier New
62 ;;; A maximal mswindows font spec looks like:
63 ;;; Courier New:Bold Italic:10:underline strikeout:Western
64 ;;; Missing parts of the font spec should be filled in with these values:
65 ;;; Courier New:Regular:10::Western
66 (defun mswindows-font-canonicalize-name (font)
67 "Given a mswindows font or font name, this returns its name in
68 canonical form."
69 (if (or (font-instance-p font)
70 (stringp font))
71 (let ((name (if (font-instance-p font)
72 (font-instance-name font)
73 font)))
74 (cond ((string-match
75 "^[a-zA-Z ]+:[a-zA-Z ]*:[0-9]+:[a-zA-Z ]*:[a-zA-Z 0-9]*$"
76 name) name)
77 ((string-match "^[a-zA-Z ]+:[a-zA-Z ]*:[0-9]+:[a-zA-Z ]*$"
78 name) (concat name ":Western"))
79 ((string-match "^[a-zA-Z ]+:[a-zA-Z ]*:[0-9]+$" name)
80 (concat name "::Western"))
81 ((string-match "^[a-zA-Z ]+:[a-zA-Z ]*$" name)
82 (concat name ":10::Western"))
83 ((string-match "^[a-zA-Z ]+$" name)
84 (concat name ":Regular:10::Western"))
85 (t "Courier New:Regular:10::Western")))))
86
87 (defun mswindows-make-font-bold (font &optional device)
88 "Given a mswindows font specification, this attempts to make a bold font.
89 If it fails, it returns nil."
90 (if (font-instance-p font)
91 (let ((name (mswindows-font-canonicalize-name font))
92 (oldwidth (font-instance-width font)))
93 (string-match "^[a-zA-Z ]+:\\([a-zA-Z ]*\\):" name)
94 (let ((newfont (make-font-instance
95 (concat (substring name 0 (match-beginning 1))
96 "Bold" (substring name (match-end 1)))
97 device t)))
98 ; Hack! on mswindows, bold fonts (even monospaced) are often wider than the
99 ; equivalent non-bold font. Making the bold font one point smaller usually
100 ; makes it the same width (maybe at the expense of making it one pixel shorter)
101 (if (font-instance-p newfont)
102 (if (> (font-instance-width newfont) oldwidth)
103 (mswindows-find-smaller-font newfont device)
104 newfont))))))
105
106 (defun mswindows-make-font-unbold (font &optional device)
107 "Given a mswindows font specification, this attempts to make a non-bold font.
108 If it fails, it returns nil."
109 (if (font-instance-p font)
110 (let ((name (mswindows-font-canonicalize-name font)))
111 (string-match "^[a-zA-Z ]+:\\([a-zA-Z ]*\\):" name)
112 (make-font-instance (concat
113 (substring name 0 (match-beginning 1))
114 "Regular" (substring name (match-end 1)))
115 device t))))
116
117 (defun mswindows-make-font-italic (font &optional device)
118 "Given a mswindows font specification, this attempts to make an `italic'
119 font. If it fails, it returns nil."
120 (if (font-instance-p font)
121 (let ((name (mswindows-font-canonicalize-name font)))
122 (string-match "^[a-zA-Z ]+:\\([a-zA-Z ]*\\):" name)
123 (make-font-instance (concat
124 (substring name 0 (match-beginning 1))
125 "Italic" (substring name (match-end 1)))
126 device t))))
127
128 (defun mswindows-make-font-unitalic (font &optional device)
129 "Given a mswindows font specification, this attempts to make a non-italic
130 font. If it fails, it returns nil."
131 (if (font-instance-p font)
132 (let ((name (mswindows-font-canonicalize-name font)))
133 (string-match "^[a-zA-Z ]+:\\([a-zA-Z ]*\\):" name)
134 (make-font-instance (concat
135 (substring name 0 (match-beginning 1))
136 "Regular" (substring name (match-end 1)))
137 device t))))
138
139 (defun mswindows-make-font-bold-italic (font &optional device)
140 "Given a mswindows font specification, this attempts to make a `bold-italic'
141 font. If it fails, it returns nil."
142 (if (font-instance-p font)
143 (let ((name (mswindows-font-canonicalize-name font))
144 (oldwidth (font-instance-width font)))
145 (string-match "^[a-zA-Z ]+:\\([a-zA-Z ]*\\):" name)
146 (let ((newfont (make-font-instance
147 (concat (substring name 0 (match-beginning 1))
148 "Bold Italic" (substring name (match-end 1)))
149 device t)))
150 ; Hack! on mswindows, bold fonts (even monospaced) are often wider than the
151 ; equivalent non-bold font. Making the bold font one point smaller usually
152 ; makes it the same width (maybe at the expense of making it one pixel shorter)
153 (if (font-instance-p newfont)
154 (if (> (font-instance-width newfont) oldwidth)
155 (mswindows-find-smaller-font newfont device)
156 newfont))))))
157
158 (defun mswindows-find-smaller-font (font &optional device)
159 "Loads a new version of the given font (or font name) 1 point smaller.
160 Returns the font if it succeeds, nil otherwise."
161 (if (stringp font) (setq font (make-font-instance font device)))
162 (if (font-instance-p font) (setq font (font-instance-truename font)))
163 (if (stringp font) (setq font (make-font-instance font device)))
164 (if (font-instance-p font)
165 (let (old-size (name (mswindows-font-canonicalize-name font)))
166 (string-match "^[a-zA-Z ]+:[a-zA-Z ]*:\\([0-9]+\\):" name)
167 (setq old-size (string-to-int
168 (substring name (match-beginning 1) (match-end 1))))
169 (if (> old-size 0)
170 (make-font-instance (concat
171 (substring name 0 (match-beginning 1))
172 (int-to-string (- old-size 1))
173 (substring name (match-end 1)))
174 device t)))))
175
176 (defun mswindows-find-larger-font (font &optional device)
177 "Loads a new version of the given font (or font name) 1 point larger.
178 Returns the font if it succeeds, nil otherwise."
179 (if (stringp font) (setq font (make-font-instance font device)))
180 (if (font-instance-p font) (setq font (font-instance-truename font)))
181 (if (stringp font) (setq font (make-font-instance font device)))
182 (if (font-instance-p font)
183 (let (old-size (name (mswindows-font-canonicalize-name font)))
184 (string-match "^[a-zA-Z ]+:[a-zA-Z ]*:\\([0-9]+\\):" name)
185 (setq old-size (string-to-int
186 (substring name (match-beginning 1) (match-end 1))))
187 (make-font-instance (concat
188 (substring name 0 (match-beginning 1))
189 (int-to-string (+ old-size 1))
190 (substring name (match-end 1)))
191 device t))))