Commit | Line | Data |
---|---|---|
8cd39fb3 MH |
1 | ;;; rng-util.el --- utility functions for RELAX NG library |
2 | ||
acaf905b | 3 | ;; Copyright (C) 2003, 2007-2012 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 | |
4936186e | 10 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
09aa73e6 | 11 | ;; it under the terms of the GNU General Public License as published by |
4936186e GM |
12 | ;; the Free Software Foundation, either version 3 of the License, or |
13 | ;; (at your option) 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 | |
4936186e | 21 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
8cd39fb3 MH |
22 | |
23 | ;;; Commentary: | |
24 | ||
25 | ;;; Code: | |
26 | ||
27 | (defun rng-make-datatypes-uri (uri) | |
28 | (if (string-equal uri "") | |
29 | ;; The spec doesn't say to do this, but it's perfectly conformant | |
30 | ;; and better than using nil, I think. | |
31 | 'http://relaxng.org/ns/structure/1.0 | |
32 | (intern uri))) | |
33 | ||
34 | (defconst rng-xsd-datatypes-uri | |
35 | (rng-make-datatypes-uri "http://www.w3.org/2001/XMLSchema-datatypes")) | |
36 | ||
37 | (defconst rng-builtin-datatypes-uri (rng-make-datatypes-uri "")) | |
38 | ||
39 | (defun rng-uniquify-eq (list) | |
10545bd8 | 40 | "Destructively remove `eq' duplicates from LIST." |
8cd39fb3 MH |
41 | (and list |
42 | (let ((head list)) | |
43 | (while (cdr head) | |
44 | (if (eq (car head) (cadr head)) | |
45 | (setcdr head (cddr head))) | |
46 | (setq head (cdr head))) | |
47 | list))) | |
48 | ||
49 | (defun rng-uniquify-equal (list) | |
10545bd8 | 50 | "Destructively remove `equal' duplicates from LIST." |
8cd39fb3 MH |
51 | (and list |
52 | (let ((head list)) | |
53 | (while (cdr head) | |
54 | (if (equal (car head) (cadr head)) | |
55 | (setcdr head (cddr head))) | |
56 | (setq head (cdr head))) | |
57 | list))) | |
58 | ||
59 | (defun rng-blank-p (str) (string-match "\\`[ \t\n\r]*\\'" str)) | |
60 | ||
61 | (defun rng-substq (new old list) | |
10545bd8 | 62 | "Replace first member of LIST (if any) that is `eq' to OLD by NEW. |
8cd39fb3 MH |
63 | LIST is not modified." |
64 | (cond ((null list) nil) | |
65 | ((eq (car list) old) | |
66 | (cons new (cdr list))) | |
67 | (t | |
68 | (let ((tail (cons (car list) | |
69 | nil)) | |
70 | (rest (cdr list))) | |
71 | (setq list tail) | |
72 | (while rest | |
73 | (let ((item (car rest))) | |
74 | (setq rest (cdr rest)) | |
75 | (cond ((eq item old) | |
76 | (setcdr tail | |
77 | (cons new rest)) | |
78 | (setq rest nil)) | |
79 | (t | |
80 | (setq tail | |
81 | (setcdr tail | |
82 | (cons item nil)))))))) | |
83 | list))) | |
84 | ||
85 | (defun rng-complete-before-point (start table prompt &optional predicate hist) | |
86 | "Complete text between START and point. | |
87 | Replaces the text between START and point with a string chosen using a | |
88 | completion table and, when needed, input read from the user with the | |
89 | minibuffer. | |
90 | Returns the new string if either a complete and unique completion was | |
10545bd8 | 91 | determined automatically or input was read from the user. Otherwise, |
8cd39fb3 MH |
92 | returns nil. |
93 | TABLE is an alist, a symbol bound to a function or an obarray as with | |
94 | the function `completing-read'. | |
95 | PROMPT is the string to prompt with if user input is needed. | |
96 | PREDICATE is nil or a function as with `completing-read'. | |
97 | HIST, if non-nil, specifies a history list as with `completing-read'." | |
98 | (let* ((orig (buffer-substring-no-properties start (point))) | |
99 | (completion (try-completion orig table predicate))) | |
100 | (cond ((not completion) | |
101 | (if (string= orig "") | |
102 | (message "No completions available") | |
103 | (message "No completion for %s" (rng-quote-string orig))) | |
104 | (ding) | |
105 | nil) | |
106 | ((eq completion t) orig) | |
107 | ((not (string= completion orig)) | |
108 | (delete-region start (point)) | |
109 | (insert completion) | |
110 | (cond ((not (rng-completion-exact-p completion table predicate)) | |
111 | (message "Incomplete") | |
112 | nil) | |
113 | ((eq (try-completion completion table predicate) t) | |
114 | completion) | |
115 | (t | |
116 | (message "Complete but not unique") | |
117 | nil))) | |
118 | (t | |
119 | (setq completion | |
120 | (let ((saved-minibuffer-setup-hook | |
121 | (default-value 'minibuffer-setup-hook))) | |
122 | (add-hook 'minibuffer-setup-hook | |
123 | 'minibuffer-completion-help | |
124 | t) | |
125 | (unwind-protect | |
126 | (completing-read prompt | |
127 | table | |
128 | predicate | |
129 | nil | |
130 | orig | |
131 | hist) | |
132 | (setq-default minibuffer-setup-hook | |
133 | saved-minibuffer-setup-hook)))) | |
134 | (delete-region start (point)) | |
135 | (insert completion) | |
136 | completion)))) | |
137 | ||
138 | (defun rng-completion-exact-p (string table predicate) | |
139 | (cond ((symbolp table) | |
140 | (funcall table string predicate 'lambda)) | |
141 | ((vectorp table) | |
142 | (intern-soft string table)) | |
143 | (t (assoc string table)))) | |
144 | ||
145 | (defun rng-quote-string (s) | |
146 | (concat "\"" s "\"")) | |
147 | ||
148 | (defun rng-escape-string (s) | |
149 | (replace-regexp-in-string "[&\"<>]" | |
150 | (lambda (match) | |
151 | (cdr (assoc match | |
152 | '(("&" . "&") | |
153 | ("\"" . """) | |
154 | (">" . ">") | |
155 | ("<" . "<"))))) | |
156 | s | |
157 | t)) | |
158 | ||
159 | (defun rng-collapse-space (string) | |
160 | (setq string | |
161 | (replace-regexp-in-string "[ \t\r\n]+" " " string t t)) | |
162 | (when (string-match "\\` " string) | |
163 | (setq string (substring string 1))) | |
164 | (when (string-match " \\'" string) | |
165 | (setq string (substring string 0 -1))) | |
166 | string) | |
167 | ||
168 | (provide 'rng-util) | |
169 | ||
170 | ;;; rng-util.el ends here |