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1 | ;;; rng-util.el --- utility functions for RELAX NG library |
2 | ||
dcb8ac09 | 3 | ;; Copyright (C) 2003, 2007, 2008 Free Software Foundation, Inc. |
8cd39fb3 MH |
4 | |
5 | ;; Author: James Clark | |
6 | ;; Keywords: XML, RelaxNG | |
7 | ||
09aa73e6 | 8 | ;; This file is part of GNU Emacs. |
8cd39fb3 | 9 | |
09aa73e6 GM |
10 | ;; GNU Emacs is free software; you can redistribute it and/or modify |
11 | ;; it under the terms of the GNU General Public License as published by | |
12 | ;; the Free Software Foundation; either version 3, or (at your option) | |
13 | ;; any later version. | |
8cd39fb3 | 14 | |
09aa73e6 GM |
15 | ;; GNU Emacs is distributed in the hope that it will be useful, |
16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;; GNU General Public License for more details. | |
19 | ||
20 | ;; You should have received a copy of the GNU General Public License | |
21 | ;; along with GNU Emacs; see the file COPYING. If not, write to the | |
22 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | |
23 | ;; Boston, MA 02110-1301, USA. | |
8cd39fb3 MH |
24 | |
25 | ;;; Commentary: | |
26 | ||
27 | ;;; Code: | |
28 | ||
29 | (defun rng-make-datatypes-uri (uri) | |
30 | (if (string-equal uri "") | |
31 | ;; The spec doesn't say to do this, but it's perfectly conformant | |
32 | ;; and better than using nil, I think. | |
33 | 'http://relaxng.org/ns/structure/1.0 | |
34 | (intern uri))) | |
35 | ||
36 | (defconst rng-xsd-datatypes-uri | |
37 | (rng-make-datatypes-uri "http://www.w3.org/2001/XMLSchema-datatypes")) | |
38 | ||
39 | (defconst rng-builtin-datatypes-uri (rng-make-datatypes-uri "")) | |
40 | ||
41 | (defun rng-uniquify-eq (list) | |
42 | "Destructively remove any element from LIST that is eq to | |
43 | its predecessor." | |
44 | (and list | |
45 | (let ((head list)) | |
46 | (while (cdr head) | |
47 | (if (eq (car head) (cadr head)) | |
48 | (setcdr head (cddr head))) | |
49 | (setq head (cdr head))) | |
50 | list))) | |
51 | ||
52 | (defun rng-uniquify-equal (list) | |
53 | "Destructively remove any element from LIST that is equal to | |
54 | its predecessor." | |
55 | (and list | |
56 | (let ((head list)) | |
57 | (while (cdr head) | |
58 | (if (equal (car head) (cadr head)) | |
59 | (setcdr head (cddr head))) | |
60 | (setq head (cdr head))) | |
61 | list))) | |
62 | ||
63 | (defun rng-blank-p (str) (string-match "\\`[ \t\n\r]*\\'" str)) | |
64 | ||
65 | (defun rng-substq (new old list) | |
66 | "Replace first member of LIST (if any) that is eq to OLD by NEW. | |
67 | LIST is not modified." | |
68 | (cond ((null list) nil) | |
69 | ((eq (car list) old) | |
70 | (cons new (cdr list))) | |
71 | (t | |
72 | (let ((tail (cons (car list) | |
73 | nil)) | |
74 | (rest (cdr list))) | |
75 | (setq list tail) | |
76 | (while rest | |
77 | (let ((item (car rest))) | |
78 | (setq rest (cdr rest)) | |
79 | (cond ((eq item old) | |
80 | (setcdr tail | |
81 | (cons new rest)) | |
82 | (setq rest nil)) | |
83 | (t | |
84 | (setq tail | |
85 | (setcdr tail | |
86 | (cons item nil)))))))) | |
87 | list))) | |
88 | ||
89 | (defun rng-complete-before-point (start table prompt &optional predicate hist) | |
90 | "Complete text between START and point. | |
91 | Replaces the text between START and point with a string chosen using a | |
92 | completion table and, when needed, input read from the user with the | |
93 | minibuffer. | |
94 | Returns the new string if either a complete and unique completion was | |
95 | determined automatically or input was read from the user. Otherwise, | |
96 | returns nil. | |
97 | TABLE is an alist, a symbol bound to a function or an obarray as with | |
98 | the function `completing-read'. | |
99 | PROMPT is the string to prompt with if user input is needed. | |
100 | PREDICATE is nil or a function as with `completing-read'. | |
101 | HIST, if non-nil, specifies a history list as with `completing-read'." | |
102 | (let* ((orig (buffer-substring-no-properties start (point))) | |
103 | (completion (try-completion orig table predicate))) | |
104 | (cond ((not completion) | |
105 | (if (string= orig "") | |
106 | (message "No completions available") | |
107 | (message "No completion for %s" (rng-quote-string orig))) | |
108 | (ding) | |
109 | nil) | |
110 | ((eq completion t) orig) | |
111 | ((not (string= completion orig)) | |
112 | (delete-region start (point)) | |
113 | (insert completion) | |
114 | (cond ((not (rng-completion-exact-p completion table predicate)) | |
115 | (message "Incomplete") | |
116 | nil) | |
117 | ((eq (try-completion completion table predicate) t) | |
118 | completion) | |
119 | (t | |
120 | (message "Complete but not unique") | |
121 | nil))) | |
122 | (t | |
123 | (setq completion | |
124 | (let ((saved-minibuffer-setup-hook | |
125 | (default-value 'minibuffer-setup-hook))) | |
126 | (add-hook 'minibuffer-setup-hook | |
127 | 'minibuffer-completion-help | |
128 | t) | |
129 | (unwind-protect | |
130 | (completing-read prompt | |
131 | table | |
132 | predicate | |
133 | nil | |
134 | orig | |
135 | hist) | |
136 | (setq-default minibuffer-setup-hook | |
137 | saved-minibuffer-setup-hook)))) | |
138 | (delete-region start (point)) | |
139 | (insert completion) | |
140 | completion)))) | |
141 | ||
142 | (defun rng-completion-exact-p (string table predicate) | |
143 | (cond ((symbolp table) | |
144 | (funcall table string predicate 'lambda)) | |
145 | ((vectorp table) | |
146 | (intern-soft string table)) | |
147 | (t (assoc string table)))) | |
148 | ||
149 | (defun rng-quote-string (s) | |
150 | (concat "\"" s "\"")) | |
151 | ||
152 | (defun rng-escape-string (s) | |
153 | (replace-regexp-in-string "[&\"<>]" | |
154 | (lambda (match) | |
155 | (cdr (assoc match | |
156 | '(("&" . "&") | |
157 | ("\"" . """) | |
158 | (">" . ">") | |
159 | ("<" . "<"))))) | |
160 | s | |
161 | t)) | |
162 | ||
163 | (defun rng-collapse-space (string) | |
164 | (setq string | |
165 | (replace-regexp-in-string "[ \t\r\n]+" " " string t t)) | |
166 | (when (string-match "\\` " string) | |
167 | (setq string (substring string 1))) | |
168 | (when (string-match " \\'" string) | |
169 | (setq string (substring string 0 -1))) | |
170 | string) | |
171 | ||
172 | (provide 'rng-util) | |
173 | ||
ab4c34c6 | 174 | ;; arch-tag: 2dc233e0-5e7a-488f-bfc4-5909512dbaf0 |
8cd39fb3 | 175 | ;;; rng-util.el ends here |