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1cd7adc6 | 1 | ;;; xml.el --- XML parser |
47db06aa | 2 | |
0d30b337 | 3 | ;; Copyright (C) 2000, 2001, 2002, 2003, 2004, |
114f9c96 | 4 | ;; 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. |
47db06aa GM |
5 | |
6 | ;; Author: Emmanuel Briot <briot@gnat.com> | |
720058f2 | 7 | ;; Maintainer: Mark A. Hershberger <mah@everybody.org> |
a98e819b | 8 | ;; Keywords: xml, data |
47db06aa GM |
9 | |
10 | ;; This file is part of GNU Emacs. | |
11 | ||
eb3fa2cf | 12 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
47db06aa | 13 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
14 | ;; the Free Software Foundation, either version 3 of the License, or |
15 | ;; (at your option) any later version. | |
47db06aa GM |
16 | |
17 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;; GNU General Public License for more details. | |
21 | ||
22 | ;; You should have received a copy of the GNU General Public License | |
eb3fa2cf | 23 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
47db06aa GM |
24 | |
25 | ;;; Commentary: | |
26 | ||
a98e819b DL |
27 | ;; This file contains a somewhat incomplete non-validating XML parser. It |
28 | ;; parses a file, and returns a list that can be used internally by | |
a1dfa9a3 | 29 | ;; any other Lisp libraries. |
47db06aa GM |
30 | |
31 | ;;; FILE FORMAT | |
32 | ||
a98e819b DL |
33 | ;; The document type declaration may either be ignored or (optionally) |
34 | ;; parsed, but currently the parsing will only accept element | |
a1dfa9a3 | 35 | ;; declarations. The XML file is assumed to be well-formed. In case |
a98e819b DL |
36 | ;; of error, the parsing stops and the XML file is shown where the |
37 | ;; parsing stopped. | |
47db06aa | 38 | ;; |
a98e819b | 39 | ;; It also knows how to ignore comments and processing instructions. |
47db06aa GM |
40 | ;; |
41 | ;; The XML file should have the following format: | |
653558a1 GM |
42 | ;; <node1 attr1="name1" attr2="name2" ...>value |
43 | ;; <node2 attr3="name3" attr4="name4">value2</node2> | |
44 | ;; <node3 attr5="name5" attr6="name6">value3</node3> | |
47db06aa | 45 | ;; </node1> |
a1dfa9a3 | 46 | ;; Of course, the name of the nodes and attributes can be anything. There can |
47db06aa GM |
47 | ;; be any number of attributes (or none), as well as any number of children |
48 | ;; below the nodes. | |
49 | ;; | |
50 | ;; There can be only top level node, but with any number of children below. | |
51 | ||
52 | ;;; LIST FORMAT | |
53 | ||
c7f8d055 SM |
54 | ;; The functions `xml-parse-file', `xml-parse-region' and |
55 | ;; `xml-parse-tag' return a list with the following format: | |
47db06aa GM |
56 | ;; |
57 | ;; xml-list ::= (node node ...) | |
c7f8d055 | 58 | ;; node ::= (qname attribute-list . child_node_list) |
47db06aa GM |
59 | ;; child_node_list ::= child_node child_node ... |
60 | ;; child_node ::= node | string | |
c7f8d055 SM |
61 | ;; qname ::= (:namespace-uri . "name") | "name" |
62 | ;; attribute_list ::= ((qname . "value") (qname . "value") ...) | |
47db06aa GM |
63 | ;; | nil |
64 | ;; string ::= "..." | |
65 | ;; | |
a98e819b DL |
66 | ;; Some macros are provided to ease the parsing of this list. |
67 | ;; Whitespace is preserved. Fixme: There should be a tree-walker that | |
68 | ;; can remove it. | |
47db06aa | 69 | |
c7f8d055 SM |
70 | ;; TODO: |
71 | ;; * xml:base, xml:space support | |
72 | ;; * more complete DOCTYPE parsing | |
73 | ;; * pi support | |
74 | ||
47db06aa GM |
75 | ;;; Code: |
76 | ||
f6fcdfff CY |
77 | ;; Note that buffer-substring and match-string were formerly used in |
78 | ;; several places, because the -no-properties variants remove | |
79 | ;; composition info. However, after some discussion on emacs-devel, | |
80 | ;; the consensus was that the speed of the -no-properties variants was | |
81 | ;; a worthwhile tradeoff especially since we're usually parsing files | |
82 | ;; instead of hand-crafted XML. | |
a98e819b | 83 | |
47db06aa GM |
84 | ;;******************************************************************* |
85 | ;;** | |
86 | ;;** Macros to parse the list | |
87 | ;;** | |
88 | ;;******************************************************************* | |
89 | ||
f8ab034e MH |
90 | (defconst xml-undefined-entity "?" |
91 | "What to substitute for undefined entities") | |
92 | ||
6d12a4df MH |
93 | (defvar xml-entity-alist |
94 | '(("lt" . "<") | |
95 | ("gt" . ">") | |
96 | ("apos" . "'") | |
97 | ("quot" . "\"") | |
98 | ("amp" . "&")) | |
99 | "The defined entities. Entities are added to this when the DTD is parsed.") | |
100 | ||
101 | (defvar xml-sub-parser nil | |
102 | "Dynamically set this to a non-nil value if you want to parse an XML fragment.") | |
103 | ||
104 | (defvar xml-validating-parser nil | |
105 | "Set to non-nil to get validity checking.") | |
106 | ||
971489ea | 107 | (defsubst xml-node-name (node) |
47db06aa | 108 | "Return the tag associated with NODE. |
a1dfa9a3 SM |
109 | Without namespace-aware parsing, the tag is a symbol. |
110 | ||
111 | With namespace-aware parsing, the tag is a cons of a string | |
112 | representing the uri of the namespace with the local name of the | |
113 | tag. For example, | |
114 | ||
115 | <foo> | |
116 | ||
117 | would be represented by | |
118 | ||
119 | '(\"\" . \"foo\")." | |
120 | ||
971489ea | 121 | (car node)) |
47db06aa | 122 | |
971489ea | 123 | (defsubst xml-node-attributes (node) |
47db06aa GM |
124 | "Return the list of attributes of NODE. |
125 | The list can be nil." | |
971489ea | 126 | (nth 1 node)) |
47db06aa | 127 | |
971489ea | 128 | (defsubst xml-node-children (node) |
47db06aa GM |
129 | "Return the list of children of NODE. |
130 | This is a list of nodes, and it can be nil." | |
971489ea | 131 | (cddr node)) |
47db06aa GM |
132 | |
133 | (defun xml-get-children (node child-name) | |
134 | "Return the children of NODE whose tag is CHILD-NAME. | |
a1dfa9a3 | 135 | CHILD-NAME should match the value returned by `xml-node-name'." |
971489ea SM |
136 | (let ((match ())) |
137 | (dolist (child (xml-node-children node)) | |
a1dfa9a3 SM |
138 | (if (and (listp child) |
139 | (equal (xml-node-name child) child-name)) | |
140 | (push child match))) | |
971489ea | 141 | (nreverse match))) |
47db06aa | 142 | |
9bcd6a7e | 143 | (defun xml-get-attribute-or-nil (node attribute) |
47db06aa | 144 | "Get from NODE the value of ATTRIBUTE. |
a1dfa9a3 | 145 | Return nil if the attribute was not found. |
9bcd6a7e EZ |
146 | |
147 | See also `xml-get-attribute'." | |
2e9bdf15 | 148 | (cdr (assoc attribute (xml-node-attributes node)))) |
9bcd6a7e EZ |
149 | |
150 | (defsubst xml-get-attribute (node attribute) | |
151 | "Get from NODE the value of ATTRIBUTE. | |
152 | An empty string is returned if the attribute was not found. | |
153 | ||
154 | See also `xml-get-attribute-or-nil'." | |
155 | (or (xml-get-attribute-or-nil node attribute) "")) | |
47db06aa GM |
156 | |
157 | ;;******************************************************************* | |
158 | ;;** | |
159 | ;;** Creating the list | |
160 | ;;** | |
161 | ;;******************************************************************* | |
162 | ||
a98e819b | 163 | ;;;###autoload |
2d42509a | 164 | (defun xml-parse-file (file &optional parse-dtd parse-ns) |
a98e819b DL |
165 | "Parse the well-formed XML file FILE. |
166 | If FILE is already visited, use its buffer and don't kill it. | |
47db06aa | 167 | Returns the top node with all its children. |
2d42509a JB |
168 | If PARSE-DTD is non-nil, the DTD is parsed rather than skipped. |
169 | If PARSE-NS is non-nil, then QNAMES are expanded." | |
882cb60d RS |
170 | (if (get-file-buffer file) |
171 | (with-current-buffer (get-file-buffer file) | |
172 | (save-excursion | |
173 | (xml-parse-region (point-min) | |
174 | (point-max) | |
175 | (current-buffer) | |
176 | parse-dtd parse-ns))) | |
177 | (with-temp-buffer | |
178 | (insert-file-contents file) | |
179 | (xml-parse-region (point-min) | |
180 | (point-max) | |
181 | (current-buffer) | |
182 | parse-dtd parse-ns)))) | |
47db06aa | 183 | |
6d12a4df | 184 | |
5ed32352 RS |
185 | (defvar xml-name-re) |
186 | (defvar xml-entity-value-re) | |
0bf41002 | 187 | (defvar xml-att-def-re) |
63b446bc | 188 | (let* ((start-chars (concat "[:alpha:]:_")) |
6d12a4df | 189 | (name-chars (concat "-[:digit:]." start-chars)) |
5178753d | 190 | ;;[3] S ::= (#x20 | #x9 | #xD | #xA)+ |
6d12a4df | 191 | (whitespace "[ \t\n\r]")) |
5178753d MH |
192 | ;;[4] NameStartChar ::= ":" | [A-Z] | "_" | [a-z] | [#xC0-#xD6] |
193 | ;; | [#xD8-#xF6] | [#xF8-#x2FF] | [#x370-#x37D] | [#x37F-#x1FFF] | |
194 | ;; | [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | |
195 | ;; | [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF] | |
6d12a4df | 196 | (defvar xml-name-start-char-re (concat "[" start-chars "]")) |
5178753d | 197 | ;;[4a] NameChar ::= NameStartChar | "-" | "." | [0-9] | #xB7 | [#x0300-#x036F] | [#x203F-#x2040] |
6d12a4df | 198 | (defvar xml-name-char-re (concat "[" name-chars "]")) |
5178753d | 199 | ;;[5] Name ::= NameStartChar (NameChar)* |
6d12a4df | 200 | (defvar xml-name-re (concat xml-name-start-char-re xml-name-char-re "*")) |
5178753d | 201 | ;;[6] Names ::= Name (#x20 Name)* |
6d12a4df | 202 | (defvar xml-names-re (concat xml-name-re "\\(?: " xml-name-re "\\)*")) |
5178753d | 203 | ;;[7] Nmtoken ::= (NameChar)+ |
6d12a4df | 204 | (defvar xml-nmtoken-re (concat xml-name-char-re "+")) |
5178753d | 205 | ;;[8] Nmtokens ::= Nmtoken (#x20 Nmtoken)* |
6d12a4df | 206 | (defvar xml-nmtokens-re (concat xml-nmtoken-re "\\(?: " xml-name-re "\\)*")) |
5178753d | 207 | ;;[66] CharRef ::= '&#' [0-9]+ ';' | '&#x' [0-9a-fA-F]+ ';' |
6d12a4df | 208 | (defvar xml-char-ref-re "\\(?:&#[0-9]+;\\|&#x[0-9a-fA-F]+;\\)") |
5178753d | 209 | ;;[68] EntityRef ::= '&' Name ';' |
6d12a4df | 210 | (defvar xml-entity-ref (concat "&" xml-name-re ";")) |
5178753d | 211 | ;;[69] PEReference ::= '%' Name ';' |
6d12a4df | 212 | (defvar xml-pe-reference-re (concat "%" xml-name-re ";")) |
5178753d | 213 | ;;[67] Reference ::= EntityRef | CharRef |
6d12a4df | 214 | (defvar xml-reference-re (concat "\\(?:" xml-entity-ref "\\|" xml-char-ref-re "\\)")) |
5178753d | 215 | ;;[10] AttValue ::= '"' ([^<&"] | Reference)* '"' | "'" ([^<&'] | Reference)* "'" |
23d519e4 MH |
216 | (defvar xml-att-value-re (concat "\\(?:\"\\(?:[^&\"]\\|" xml-reference-re "\\)*\"\\|" |
217 | "'\\(?:[^&']\\|" xml-reference-re "\\)*'\\)")) | |
5178753d MH |
218 | ;;[56] TokenizedType ::= 'ID' [VC: ID] [VC: One ID per Element Type] [VC: ID Attribute Default] |
219 | ;; | 'IDREF' [VC: IDREF] | |
220 | ;; | 'IDREFS' [VC: IDREF] | |
221 | ;; | 'ENTITY' [VC: Entity Name] | |
222 | ;; | 'ENTITIES' [VC: Entity Name] | |
223 | ;; | 'NMTOKEN' [VC: Name Token] | |
224 | ;; | 'NMTOKENS' [VC: Name Token] | |
23d519e4 | 225 | (defvar xml-tokenized-type-re "\\(?:ID\\|IDREF\\|IDREFS\\|ENTITY\\|ENTITIES\\|NMTOKEN\\|NMTOKENS\\)") |
5178753d | 226 | ;;[58] NotationType ::= 'NOTATION' S '(' S? Name (S? '|' S? Name)* S? ')' |
23d519e4 MH |
227 | (defvar xml-notation-type-re (concat "\\(?:NOTATION" whitespace "(" whitespace "*" xml-name-re |
228 | "\\(?:" whitespace "*|" whitespace "*" xml-name-re "\\)*" whitespace "*)\\)")) | |
5178753d | 229 | ;;[59] Enumeration ::= '(' S? Nmtoken (S? '|' S? Nmtoken)* S? ')' [VC: Enumeration] [VC: No Duplicate Tokens] |
23d519e4 MH |
230 | (defvar xml-enumeration-re (concat "\\(?:(" whitespace "*" xml-nmtoken-re |
231 | "\\(?:" whitespace "*|" whitespace "*" xml-nmtoken-re "\\)*" | |
232 | whitespace ")\\)")) | |
5178753d | 233 | ;;[57] EnumeratedType ::= NotationType | Enumeration |
23d519e4 | 234 | (defvar xml-enumerated-type-re (concat "\\(?:" xml-notation-type-re "\\|" xml-enumeration-re "\\)")) |
5178753d MH |
235 | ;;[54] AttType ::= StringType | TokenizedType | EnumeratedType |
236 | ;;[55] StringType ::= 'CDATA' | |
23d519e4 | 237 | (defvar xml-att-type-re (concat "\\(?:CDATA\\|" xml-tokenized-type-re "\\|" xml-notation-type-re"\\|" xml-enumerated-type-re "\\)")) |
5178753d | 238 | ;;[60] DefaultDecl ::= '#REQUIRED' | '#IMPLIED' | (('#FIXED' S)? AttValue) |
23d519e4 | 239 | (defvar xml-default-decl-re (concat "\\(?:#REQUIRED\\|#IMPLIED\\|\\(?:#FIXED" whitespace "\\)*" xml-att-value-re "\\)")) |
5178753d | 240 | ;;[53] AttDef ::= S Name S AttType S DefaultDecl |
23d519e4 MH |
241 | (defvar xml-att-def-re (concat "\\(?:" whitespace "*" xml-name-re |
242 | whitespace "*" xml-att-type-re | |
243 | whitespace "*" xml-default-decl-re "\\)")) | |
5178753d MH |
244 | ;;[9] EntityValue ::= '"' ([^%&"] | PEReference | Reference)* '"' |
245 | ;; | "'" ([^%&'] | PEReference | Reference)* "'" | |
6d12a4df MH |
246 | (defvar xml-entity-value-re (concat "\\(?:\"\\(?:[^%&\"]\\|" xml-pe-reference-re |
247 | "\\|" xml-reference-re "\\)*\"\\|'\\(?:[^%&']\\|" | |
248 | xml-pe-reference-re "\\|" xml-reference-re "\\)*'\\)"))) | |
249 | ;;[75] ExternalID ::= 'SYSTEM' S SystemLiteral | |
250 | ;; | 'PUBLIC' S PubidLiteral S SystemLiteral | |
251 | ;;[76] NDataDecl ::= S 'NDATA' S | |
252 | ;;[73] EntityDef ::= EntityValue| (ExternalID NDataDecl?) | |
253 | ;;[71] GEDecl ::= '<!ENTITY' S Name S EntityDef S? '>' | |
254 | ;;[74] PEDef ::= EntityValue | ExternalID | |
255 | ;;[72] PEDecl ::= '<!ENTITY' S '%' S Name S PEDef S? '>' | |
256 | ;;[70] EntityDecl ::= GEDecl | PEDecl | |
257 | ||
a98e819b DL |
258 | ;; Note that this is setup so that we can do whitespace-skipping with |
259 | ;; `(skip-syntax-forward " ")', inter alia. Previously this was slow | |
260 | ;; compared with `re-search-forward', but that has been fixed. Also | |
261 | ;; note that the standard syntax table contains other characters with | |
262 | ;; whitespace syntax, like NBSP, but they are invalid in contexts in | |
263 | ;; which we might skip whitespace -- specifically, they're not | |
264 | ;; NameChars [XML 4]. | |
265 | ||
266 | (defvar xml-syntax-table | |
267 | (let ((table (make-syntax-table))) | |
268 | ;; Get space syntax correct per XML [3]. | |
269 | (dotimes (c 31) | |
270 | (modify-syntax-entry c "." table)) ; all are space in standard table | |
5178753d | 271 | (dolist (c '(?\t ?\n ?\r)) ; these should be space |
a98e819b DL |
272 | (modify-syntax-entry c " " table)) |
273 | ;; For skipping attributes. | |
274 | (modify-syntax-entry ?\" "\"" table) | |
275 | (modify-syntax-entry ?' "\"" table) | |
276 | ;; Non-alnum name chars should be symbol constituents (`-' and `_' | |
277 | ;; are OK by default). | |
278 | (modify-syntax-entry ?. "_" table) | |
279 | (modify-syntax-entry ?: "_" table) | |
280 | ;; XML [89] | |
aaaa8abb MH |
281 | (unless (featurep 'xemacs) |
282 | (dolist (c '(#x00B7 #x02D0 #x02D1 #x0387 #x0640 #x0E46 #x0EC6 #x3005 | |
283 | #x3031 #x3032 #x3033 #x3034 #x3035 #x309D #x309E #x30FC | |
284 | #x30FD #x30FE)) | |
285 | (modify-syntax-entry (decode-char 'ucs c) "w" table))) | |
a98e819b DL |
286 | ;; Fixme: rest of [4] |
287 | table) | |
288 | "Syntax table used by `xml-parse-region'.") | |
289 | ||
290 | ;; XML [5] | |
291 | ;; Note that [:alpha:] matches all multibyte chars with word syntax. | |
ab161457 JPW |
292 | (eval-and-compile |
293 | (defconst xml-name-regexp "[[:alpha:]_:][[:alnum:]._:-]*")) | |
a98e819b DL |
294 | |
295 | ;; Fixme: This needs re-writing to deal with the XML grammar properly, i.e. | |
296 | ;; document ::= prolog element Misc* | |
297 | ;; prolog ::= XMLDecl? Misc* (doctypedecl Misc*)? | |
298 | ||
299 | ;;;###autoload | |
2d42509a | 300 | (defun xml-parse-region (beg end &optional buffer parse-dtd parse-ns) |
47db06aa GM |
301 | "Parse the region from BEG to END in BUFFER. |
302 | If BUFFER is nil, it defaults to the current buffer. | |
303 | Returns the XML list for the region, or raises an error if the region | |
2d42509a | 304 | is not well-formed XML. |
47db06aa | 305 | If PARSE-DTD is non-nil, the DTD is parsed rather than skipped, |
2d42509a JB |
306 | and returned as the first element of the list. |
307 | If PARSE-NS is non-nil, then QNAMES are expanded." | |
39d58fc0 MH |
308 | ;; Use fixed syntax table to ensure regexp char classes and syntax |
309 | ;; specs DTRT. | |
310 | (with-syntax-table (standard-syntax-table) | |
311 | (let ((case-fold-search nil) ; XML is case-sensitive. | |
312 | xml result dtd) | |
313 | (save-excursion | |
314 | (if buffer | |
315 | (set-buffer buffer)) | |
316 | (save-restriction | |
317 | (narrow-to-region beg end) | |
a98e819b DL |
318 | (goto-char (point-min)) |
319 | (while (not (eobp)) | |
320 | (if (search-forward "<" nil t) | |
321 | (progn | |
322 | (forward-char -1) | |
34638996 | 323 | (setq result (xml-parse-tag parse-dtd parse-ns)) |
6d12a4df | 324 | (if (and xml result (not xml-sub-parser)) |
a98e819b | 325 | ;; translation of rule [1] of XML specifications |
6d12a4df | 326 | (error "XML: (Not Well-Formed) Only one root tag allowed") |
47db06aa | 327 | (cond |
971489ea | 328 | ((null result)) |
34638996 EZ |
329 | ((and (listp (car result)) |
330 | parse-dtd) | |
971489ea | 331 | (setq dtd (car result)) |
a98e819b DL |
332 | (if (cdr result) ; possible leading comment |
333 | (add-to-list 'xml (cdr result)))) | |
47db06aa | 334 | (t |
a98e819b DL |
335 | (add-to-list 'xml result))))) |
336 | (goto-char (point-max)))) | |
337 | (if parse-dtd | |
338 | (cons dtd (nreverse xml)) | |
339 | (nreverse xml))))))) | |
47db06aa | 340 | |
c7f8d055 | 341 | (defun xml-maybe-do-ns (name default xml-ns) |
a1dfa9a3 SM |
342 | "Perform any namespace expansion. |
343 | NAME is the name to perform the expansion on. | |
c7f8d055 SM |
344 | DEFAULT is the default namespace. XML-NS is a cons of namespace |
345 | names to uris. When namespace-aware parsing is off, then XML-NS | |
346 | is nil. | |
347 | ||
348 | During namespace-aware parsing, any name without a namespace is | |
349 | put into the namespace identified by DEFAULT. nil is used to | |
350 | specify that the name shouldn't be given a namespace." | |
351 | (if (consp xml-ns) | |
352 | (let* ((nsp (string-match ":" name)) | |
353 | (lname (if nsp (substring name (match-end 0)) name)) | |
354 | (prefix (if nsp (substring name 0 (match-beginning 0)) default)) | |
355 | (special (and (string-equal lname "xmlns") (not prefix))) | |
356 | ;; Setting default to nil will insure that there is not | |
357 | ;; matching cons in xml-ns. In which case we | |
358 | (ns (or (cdr (assoc (if special "xmlns" prefix) | |
359 | xml-ns)) | |
6d12a4df | 360 | ""))) |
c7f8d055 SM |
361 | (cons ns (if special "" lname))) |
362 | (intern name))) | |
47db06aa | 363 | |
6d12a4df MH |
364 | (defun xml-parse-fragment (&optional parse-dtd parse-ns) |
365 | "Parse xml-like fragments." | |
366 | (let ((xml-sub-parser t) | |
367 | children) | |
368 | (while (not (eobp)) | |
369 | (let ((bit (xml-parse-tag | |
370 | parse-dtd parse-ns))) | |
371 | (if children | |
372 | (setq children (append (list bit) children)) | |
373 | (if (stringp bit) | |
374 | (setq children (list bit)) | |
375 | (setq children bit))))) | |
376 | (reverse children))) | |
377 | ||
2d42509a | 378 | (defun xml-parse-tag (&optional parse-dtd parse-ns) |
a98e819b | 379 | "Parse the tag at point. |
47db06aa GM |
380 | If PARSE-DTD is non-nil, the DTD of the document, if any, is parsed and |
381 | returned as the first element in the list. | |
2d42509a | 382 | If PARSE-NS is non-nil, then QNAMES are expanded. |
47db06aa | 383 | Returns one of: |
a98e819b DL |
384 | - a list : the matching node |
385 | - nil : the point is not looking at a tag. | |
386 | - a pair : the first element is the DTD, the second is the node." | |
6d12a4df MH |
387 | (let ((xml-validating-parser (or parse-dtd xml-validating-parser)) |
388 | (xml-ns (if (consp parse-ns) | |
2d42509a JB |
389 | parse-ns |
390 | (if parse-ns | |
391 | (list | |
5178753d | 392 | ;; Default for empty prefix is no namespace |
6d12a4df | 393 | (cons "" "") |
c7f8d055 | 394 | ;; "xml" namespace |
6d12a4df | 395 | (cons "xml" "http://www.w3.org/XML/1998/namespace") |
2d42509a | 396 | ;; We need to seed the xmlns namespace |
6d12a4df | 397 | (cons "xmlns" "http://www.w3.org/2000/xmlns/")))))) |
2d42509a JB |
398 | (cond |
399 | ;; Processing instructions (like the <?xml version="1.0"?> tag at the | |
400 | ;; beginning of a document). | |
401 | ((looking-at "<\\?") | |
402 | (search-forward "?>") | |
403 | (skip-syntax-forward " ") | |
404 | (xml-parse-tag parse-dtd xml-ns)) | |
405 | ;; Character data (CDATA) sections, in which no tag should be interpreted | |
406 | ((looking-at "<!\\[CDATA\\[") | |
407 | (let ((pos (match-end 0))) | |
408 | (unless (search-forward "]]>" nil t) | |
6d12a4df | 409 | (error "XML: (Not Well Formed) CDATA section does not end anywhere in the document")) |
ae026110 | 410 | (concat |
f6fcdfff | 411 | (buffer-substring-no-properties pos (match-beginning 0)) |
ae026110 | 412 | (xml-parse-string)))) |
2d42509a JB |
413 | ;; DTD for the document |
414 | ((looking-at "<!DOCTYPE") | |
6d12a4df MH |
415 | (let ((dtd (xml-parse-dtd parse-ns))) |
416 | (skip-syntax-forward " ") | |
417 | (if xml-validating-parser | |
418 | (cons dtd (xml-parse-tag nil xml-ns)) | |
419 | (xml-parse-tag nil xml-ns)))) | |
2d42509a JB |
420 | ;; skip comments |
421 | ((looking-at "<!--") | |
422 | (search-forward "-->") | |
423 | nil) | |
424 | ;; end tag | |
425 | ((looking-at "</") | |
426 | '()) | |
427 | ;; opening tag | |
428 | ((looking-at "<\\([^/>[:space:]]+\\)") | |
429 | (goto-char (match-end 1)) | |
34638996 EZ |
430 | |
431 | ;; Parse this node | |
f6fcdfff | 432 | (let* ((node-name (match-string-no-properties 1)) |
5178753d MH |
433 | ;; Parse the attribute list. |
434 | (attrs (xml-parse-attlist xml-ns)) | |
435 | children pos) | |
c7f8d055 | 436 | |
5178753d MH |
437 | ;; add the xmlns:* attrs to our cache |
438 | (when (consp xml-ns) | |
c7f8d055 SM |
439 | (dolist (attr attrs) |
440 | (when (and (consp (car attr)) | |
6d12a4df MH |
441 | (equal "http://www.w3.org/2000/xmlns/" |
442 | (caar attr))) | |
443 | (push (cons (cdar attr) (cdr attr)) | |
c7f8d055 SM |
444 | xml-ns)))) |
445 | ||
5178753d | 446 | (setq children (list attrs (xml-maybe-do-ns node-name "" xml-ns))) |
c7f8d055 | 447 | |
2d42509a JB |
448 | ;; is this an empty element ? |
449 | (if (looking-at "/>") | |
47db06aa | 450 | (progn |
6d12a4df | 451 | (forward-char 2) |
971489ea | 452 | (nreverse children)) |
6d12a4df MH |
453 | |
454 | ;; is this a valid start tag ? | |
455 | (if (eq (char-after) ?>) | |
456 | (progn | |
457 | (forward-char 1) | |
458 | ;; Now check that we have the right end-tag. Note that this | |
459 | ;; one might contain spaces after the tag name | |
460 | (let ((end (concat "</" node-name "\\s-*>"))) | |
461 | (while (not (looking-at end)) | |
462 | (cond | |
463 | ((looking-at "</") | |
464 | (error "XML: (Not Well-Formed) Invalid end tag (expecting %s) at pos %d" | |
465 | node-name (point))) | |
466 | ((= (char-after) ?<) | |
467 | (let ((tag (xml-parse-tag nil xml-ns))) | |
468 | (when tag | |
469 | (push tag children)))) | |
470 | (t | |
471 | (let ((expansion (xml-parse-string))) | |
472 | (setq children | |
473 | (if (stringp expansion) | |
474 | (if (stringp (car children)) | |
475 | ;; The two strings were separated by a comment. | |
aaaa8abb | 476 | (setq children (append (list (concat (car children) expansion)) |
6d12a4df MH |
477 | (cdr children))) |
478 | (setq children (append (list expansion) children))) | |
479 | (setq children (append expansion children)))))))) | |
480 | ||
481 | (goto-char (match-end 0)) | |
482 | (nreverse children))) | |
483 | ;; This was an invalid start tag (Expected ">", but didn't see it.) | |
484 | (error "XML: (Well-Formed) Couldn't parse tag: %s" | |
f6fcdfff | 485 | (buffer-substring-no-properties (- (point) 10) (+ (point) 1))))))) |
6d12a4df MH |
486 | (t ;; (Not one of PI, CDATA, Comment, End tag, or Start tag) |
487 | (unless xml-sub-parser ; Usually, we error out. | |
488 | (error "XML: (Well-Formed) Invalid character")) | |
489 | ||
490 | ;; However, if we're parsing incrementally, then we need to deal | |
491 | ;; with stray CDATA. | |
492 | (xml-parse-string))))) | |
493 | ||
494 | (defun xml-parse-string () | |
495 | "Parse the next whatever. Could be a string, or an element." | |
5178753d | 496 | (let* ((pos (point)) |
98b69232 | 497 | (string (progn (skip-chars-forward "^<") |
f6fcdfff | 498 | (buffer-substring-no-properties pos (point))))) |
5178753d MH |
499 | ;; Clean up the string. As per XML specifications, the XML |
500 | ;; processor should always pass the whole string to the | |
501 | ;; application. But \r's should be replaced: | |
502 | ;; http://www.w3.org/TR/2000/REC-xml-20001006#sec-line-ends | |
503 | (setq pos 0) | |
504 | (while (string-match "\r\n?" string pos) | |
505 | (setq string (replace-match "\n" t t string)) | |
506 | (setq pos (1+ (match-beginning 0)))) | |
507 | ||
508 | (xml-substitute-special string))) | |
47db06aa | 509 | |
c7f8d055 | 510 | (defun xml-parse-attlist (&optional xml-ns) |
a1dfa9a3 SM |
511 | "Return the attribute-list after point. |
512 | Leave point at the first non-blank character after the tag." | |
971489ea | 513 | (let ((attlist ()) |
34638996 | 514 | end-pos name) |
a98e819b DL |
515 | (skip-syntax-forward " ") |
516 | (while (looking-at (eval-when-compile | |
517 | (concat "\\(" xml-name-regexp "\\)\\s-*=\\s-*"))) | |
c7f8d055 | 518 | (setq end-pos (match-end 0)) |
f6fcdfff | 519 | (setq name (xml-maybe-do-ns (match-string-no-properties 1) nil xml-ns)) |
c7f8d055 | 520 | (goto-char end-pos) |
47db06aa | 521 | |
a158ff81 JB |
522 | ;; See also: http://www.w3.org/TR/2000/REC-xml-20001006#AVNormalize |
523 | ||
47db06aa GM |
524 | ;; Do we have a string between quotes (or double-quotes), |
525 | ;; or a simple word ? | |
a158ff81 | 526 | (if (looking-at "\"\\([^\"]*\\)\"") |
34638996 | 527 | (setq end-pos (match-end 0)) |
f0ec1711 | 528 | (if (looking-at "'\\([^']*\\)'") |
34638996 | 529 | (setq end-pos (match-end 0)) |
6d12a4df | 530 | (error "XML: (Not Well-Formed) Attribute values must be given between quotes"))) |
47db06aa GM |
531 | |
532 | ;; Each attribute must be unique within a given element | |
533 | (if (assoc name attlist) | |
6d12a4df | 534 | (error "XML: (Not Well-Formed) Each attribute must be unique within an element")) |
524425ae | 535 | |
a158ff81 JB |
536 | ;; Multiple whitespace characters should be replaced with a single one |
537 | ;; in the attributes | |
f6fcdfff | 538 | (let ((string (match-string-no-properties 1)) |
a158ff81 | 539 | (pos 0)) |
a98e819b | 540 | (replace-regexp-in-string "\\s-\\{2,\\}" " " string) |
6d12a4df MH |
541 | (let ((expansion (xml-substitute-special string))) |
542 | (unless (stringp expansion) | |
5178753d MH |
543 | ; We say this is the constraint. It is acctually that |
544 | ; external entities nor "<" can be in an attribute value. | |
6d12a4df MH |
545 | (error "XML: (Not Well-Formed) Entities in attributes cannot expand into elements")) |
546 | (push (cons name expansion) attlist))) | |
a158ff81 | 547 | |
34638996 | 548 | (goto-char end-pos) |
a98e819b | 549 | (skip-syntax-forward " ")) |
971489ea | 550 | (nreverse attlist))) |
47db06aa GM |
551 | |
552 | ;;******************************************************************* | |
553 | ;;** | |
554 | ;;** The DTD (document type declaration) | |
555 | ;;** The following functions know how to skip or parse the DTD of | |
556 | ;;** a document | |
557 | ;;** | |
558 | ;;******************************************************************* | |
559 | ||
a98e819b DL |
560 | ;; Fixme: This fails at least if the DTD contains conditional sections. |
561 | ||
562 | (defun xml-skip-dtd () | |
563 | "Skip the DTD at point. | |
47db06aa | 564 | This follows the rule [28] in the XML specifications." |
6d12a4df MH |
565 | (let ((xml-validating-parser nil)) |
566 | (xml-parse-dtd))) | |
47db06aa | 567 | |
6d12a4df | 568 | (defun xml-parse-dtd (&optional parse-ns) |
a98e819b DL |
569 | "Parse the DTD at point." |
570 | (forward-char (eval-when-compile (length "<!DOCTYPE"))) | |
571 | (skip-syntax-forward " ") | |
6d12a4df MH |
572 | (if (and (looking-at ">") |
573 | xml-validating-parser) | |
574 | (error "XML: (Validity) Invalid DTD (expecting name of the document)")) | |
524425ae | 575 | |
971489ea | 576 | ;; Get the name of the document |
a98e819b | 577 | (looking-at xml-name-regexp) |
f6fcdfff | 578 | (let ((dtd (list (match-string-no-properties 0) 'dtd)) |
971489ea | 579 | type element end-pos) |
47db06aa GM |
580 | (goto-char (match-end 0)) |
581 | ||
a98e819b DL |
582 | (skip-syntax-forward " ") |
583 | ;; XML [75] | |
584 | (cond ((looking-at "PUBLIC\\s-+") | |
585 | (goto-char (match-end 0)) | |
586 | (unless (or (re-search-forward | |
587 | "\\=\"\\([[:space:][:alnum:]-'()+,./:=?;!*#@$_%]*\\)\"" | |
588 | nil t) | |
589 | (re-search-forward | |
590 | "\\='\\([[:space:][:alnum:]-()+,./:=?;!*#@$_%]*\\)'" | |
591 | nil t)) | |
6d12a4df | 592 | (error "XML: Missing Public ID")) |
f6fcdfff | 593 | (let ((pubid (match-string-no-properties 1))) |
6d12a4df | 594 | (skip-syntax-forward " ") |
a98e819b DL |
595 | (unless (or (re-search-forward "\\='\\([^']*\\)'" nil t) |
596 | (re-search-forward "\\=\"\\([^\"]*\\)\"" nil t)) | |
6d12a4df | 597 | (error "XML: Missing System ID")) |
f6fcdfff | 598 | (push (list pubid (match-string-no-properties 1) 'public) dtd))) |
a98e819b DL |
599 | ((looking-at "SYSTEM\\s-+") |
600 | (goto-char (match-end 0)) | |
601 | (unless (or (re-search-forward "\\='\\([^']*\\)'" nil t) | |
602 | (re-search-forward "\\=\"\\([^\"]*\\)\"" nil t)) | |
6d12a4df | 603 | (error "XML: Missing System ID")) |
f6fcdfff | 604 | (push (list (match-string-no-properties 1) 'system) dtd))) |
a98e819b DL |
605 | (skip-syntax-forward " ") |
606 | (if (eq ?> (char-after)) | |
607 | (forward-char) | |
a98e819b | 608 | (if (not (eq (char-after) ?\[)) |
6d12a4df | 609 | (error "XML: Bad DTD") |
a98e819b DL |
610 | (forward-char) |
611 | ;; Parse the rest of the DTD | |
23d519e4 | 612 | ;; Fixme: Deal with NOTATION, PIs. |
a98e819b DL |
613 | (while (not (looking-at "\\s-*\\]")) |
614 | (skip-syntax-forward " ") | |
615 | (cond | |
616 | ||
617 | ;; Translation of rule [45] of XML specifications | |
618 | ((looking-at | |
619 | "<!ELEMENT\\s-+\\([[:alnum:].%;]+\\)\\s-+\\([^>]+\\)>") | |
620 | ||
f6fcdfff | 621 | (setq element (match-string-no-properties 1) |
a98e819b DL |
622 | type (match-string-no-properties 2)) |
623 | (setq end-pos (match-end 0)) | |
624 | ||
625 | ;; Translation of rule [46] of XML specifications | |
626 | (cond | |
627 | ((string-match "^EMPTY[ \t\n\r]*$" type) ;; empty declaration | |
628 | (setq type 'empty)) | |
629 | ((string-match "^ANY[ \t\n\r]*$" type) ;; any type of contents | |
630 | (setq type 'any)) | |
631 | ((string-match "^(\\(.*\\))[ \t\n\r]*$" type) ;; children ([47]) | |
f6fcdfff | 632 | (setq type (xml-parse-elem-type (match-string-no-properties 1 type)))) |
a98e819b DL |
633 | ((string-match "^%[^;]+;[ \t\n\r]*$" type) ;; substitution |
634 | nil) | |
635 | (t | |
6d12a4df | 636 | (if xml-validating-parser |
07f7e9ae | 637 | (error "XML: (Validity) Invalid element type in the DTD")))) |
27720433 | 638 | |
a98e819b | 639 | ;; rule [45]: the element declaration must be unique |
6d12a4df MH |
640 | (if (and (assoc element dtd) |
641 | xml-validating-parser) | |
642 | (error "XML: (Validity) Element declarations must be unique in a DTD (<%s>)" | |
461f3ad0 | 643 | element)) |
a98e819b DL |
644 | |
645 | ;; Store the element in the DTD | |
646 | (push (list element type) dtd) | |
647 | (goto-char end-pos)) | |
23d519e4 MH |
648 | |
649 | ;; Translation of rule [52] of XML specifications | |
650 | ((looking-at (concat "<!ATTLIST[ \t\n\r]*\\(" xml-name-re | |
651 | "\\)[ \t\n\r]*\\(" xml-att-def-re | |
652 | "\\)*[ \t\n\r]*>")) | |
653 | ||
654 | ;; We don't do anything with ATTLIST currently | |
655 | (goto-char (match-end 0))) | |
656 | ||
a98e819b DL |
657 | ((looking-at "<!--") |
658 | (search-forward "-->")) | |
6d12a4df MH |
659 | ((looking-at (concat "<!ENTITY[ \t\n\r]*\\(" xml-name-re |
660 | "\\)[ \t\n\r]*\\(" xml-entity-value-re | |
661 | "\\)[ \t\n\r]*>")) | |
f6fcdfff CY |
662 | (let ((name (match-string-no-properties 1)) |
663 | (value (substring (match-string-no-properties 2) 1 | |
664 | (- (length (match-string-no-properties 2)) 1)))) | |
23d519e4 | 665 | (goto-char (match-end 0)) |
6d12a4df MH |
666 | (setq xml-entity-alist |
667 | (append xml-entity-alist | |
668 | (list (cons name | |
669 | (with-temp-buffer | |
670 | (insert value) | |
671 | (goto-char (point-min)) | |
672 | (xml-parse-fragment | |
673 | xml-validating-parser | |
674 | parse-ns)))))))) | |
675 | ((or (looking-at (concat "<!ENTITY[ \t\n\r]+\\(" xml-name-re | |
676 | "\\)[ \t\n\r]+SYSTEM[ \t\n\r]+" | |
677 | "\\(\"[^\"]*\"\\|'[^']*'\\)[ \t\n\r]*>")) | |
678 | (looking-at (concat "<!ENTITY[ \t\n\r]+\\(" xml-name-re | |
679 | "\\)[ \t\n\r]+PUBLIC[ \t\n\r]+" | |
680 | "\"[- \r\na-zA-Z0-9'()+,./:=?;!*#@$_%]*\"" | |
681 | "\\|'[- \r\na-zA-Z0-9()+,./:=?;!*#@$_%]*'" | |
682 | "[ \t\n\r]+\\(\"[^\"]*\"\\|'[^']*'\\)" | |
683 | "[ \t\n\r]*>"))) | |
f6fcdfff CY |
684 | (let ((name (match-string-no-properties 1)) |
685 | (file (substring (match-string-no-properties 2) 1 | |
686 | (- (length (match-string-no-properties 2)) 1)))) | |
23d519e4 | 687 | (goto-char (match-end 0)) |
6d12a4df MH |
688 | (setq xml-entity-alist |
689 | (append xml-entity-alist | |
690 | (list (cons name (with-temp-buffer | |
691 | (insert-file-contents file) | |
692 | (goto-char (point-min)) | |
693 | (xml-parse-fragment | |
694 | xml-validating-parser | |
695 | parse-ns)))))))) | |
63b446bc MH |
696 | ;; skip parameter entity declarations |
697 | ((or (looking-at (concat "<!ENTITY[ \t\n\r]+%[ \t\n\r]+\\(" xml-name-re | |
698 | "\\)[ \t\n\r]+SYSTEM[ \t\n\r]+" | |
699 | "\\(\"[^\"]*\"\\|'[^']*'\\)[ \t\n\r]*>")) | |
700 | (looking-at (concat "<!ENTITY[ \t\n\r]+" | |
701 | "%[ \t\n\r]+" | |
702 | "\\(" xml-name-re "\\)[ \t\n\r]+" | |
703 | "PUBLIC[ \t\n\r]+" | |
704 | "\\(\"[- \r\na-zA-Z0-9'()+,./:=?;!*#@$_%]*\"" | |
705 | "\\|'[- \r\na-zA-Z0-9()+,./:=?;!*#@$_%]*'\\)[ \t\n\r]+" | |
706 | "\\(\"[^\"]+\"\\|'[^']+'\\)" | |
707 | "[ \t\n\r]*>"))) | |
708 | (goto-char (match-end 0))) | |
709 | ;; skip parameter entities | |
710 | ((looking-at (concat "%" xml-name-re ";")) | |
711 | (goto-char (match-end 0))) | |
a98e819b | 712 | (t |
7e0f1123 | 713 | (when xml-validating-parser |
27720433 | 714 | (error "XML: (Validity) Invalid DTD item")))))) |
6d12a4df | 715 | (if (looking-at "\\s-*]>") |
23d519e4 | 716 | (goto-char (match-end 0)))) |
461f3ad0 | 717 | (nreverse dtd))) |
47db06aa GM |
718 | |
719 | (defun xml-parse-elem-type (string) | |
a98e819b | 720 | "Convert element type STRING into a Lisp structure." |
47db06aa GM |
721 | |
722 | (let (elem modifier) | |
723 | (if (string-match "(\\([^)]+\\))\\([+*?]?\\)" string) | |
724 | (progn | |
f6fcdfff CY |
725 | (setq elem (match-string-no-properties 1 string) |
726 | modifier (match-string-no-properties 2 string)) | |
47db06aa | 727 | (if (string-match "|" elem) |
971489ea | 728 | (setq elem (cons 'choice |
47db06aa GM |
729 | (mapcar 'xml-parse-elem-type |
730 | (split-string elem "|")))) | |
731 | (if (string-match "," elem) | |
971489ea | 732 | (setq elem (cons 'seq |
47db06aa | 733 | (mapcar 'xml-parse-elem-type |
a98e819b | 734 | (split-string elem ","))))))) |
a158ff81 | 735 | (if (string-match "[ \t\n\r]*\\([^+*?]+\\)\\([+*?]?\\)" string) |
f6fcdfff CY |
736 | (setq elem (match-string-no-properties 1 string) |
737 | modifier (match-string-no-properties 2 string)))) | |
47db06aa | 738 | |
971489ea SM |
739 | (if (and (stringp elem) (string= elem "#PCDATA")) |
740 | (setq elem 'pcdata)) | |
524425ae | 741 | |
971489ea SM |
742 | (cond |
743 | ((string= modifier "+") | |
744 | (list '+ elem)) | |
745 | ((string= modifier "*") | |
746 | (list '* elem)) | |
747 | ((string= modifier "?") | |
0fa6f70c | 748 | (list '\? elem)) |
971489ea SM |
749 | (t |
750 | elem)))) | |
47db06aa | 751 | |
47db06aa GM |
752 | ;;******************************************************************* |
753 | ;;** | |
754 | ;;** Substituting special XML sequences | |
755 | ;;** | |
756 | ;;******************************************************************* | |
757 | ||
758 | (defun xml-substitute-special (string) | |
a98e819b DL |
759 | "Return STRING, after subsituting entity references." |
760 | ;; This originally made repeated passes through the string from the | |
761 | ;; beginning, which isn't correct, since then either "&amp;" or | |
762 | ;; "&amp;" won't DTRT. | |
47db06aa | 763 | |
6d12a4df MH |
764 | (let ((point 0) |
765 | children end-point) | |
ae026110 | 766 | (while (string-match "&\\([^;]*\\);" string point) |
6d12a4df | 767 | (setq end-point (match-end 0)) |
f6fcdfff | 768 | (let* ((this-part (match-string-no-properties 1 string)) |
6d12a4df MH |
769 | (prev-part (substring string point (match-beginning 0))) |
770 | (entity (assoc this-part xml-entity-alist)) | |
771 | (expansion | |
772 | (cond ((string-match "#\\([0-9]+\\)" this-part) | |
773 | (let ((c (decode-char | |
774 | 'ucs | |
f6fcdfff | 775 | (string-to-number (match-string-no-properties 1 this-part))))) |
6d12a4df MH |
776 | (if c (string c)))) |
777 | ((string-match "#x\\([[:xdigit:]]+\\)" this-part) | |
778 | (let ((c (decode-char | |
779 | 'ucs | |
f6fcdfff | 780 | (string-to-number (match-string-no-properties 1 this-part) 16)))) |
6d12a4df MH |
781 | (if c (string c)))) |
782 | (entity | |
783 | (cdr entity)) | |
ae026110 | 784 | ((eq (length this-part) 0) |
27720433 | 785 | (error "XML: (Not Well-Formed) No entity given")) |
6d12a4df | 786 | (t |
f8ab034e | 787 | (if xml-validating-parser |
6d12a4df | 788 | (error "XML: (Validity) Undefined entity `%s'" |
f8ab034e MH |
789 | this-part) |
790 | xml-undefined-entity))))) | |
6d12a4df MH |
791 | |
792 | (cond ((null children) | |
f0d49437 MH |
793 | ;; FIXME: If we have an entity that expands into XML, this won't work. |
794 | (setq children | |
795 | (concat prev-part expansion))) | |
6d12a4df MH |
796 | ((stringp children) |
797 | (if (stringp expansion) | |
798 | (setq children (concat children prev-part expansion)) | |
799 | (setq children (list expansion (concat prev-part children))))) | |
800 | ((and (stringp expansion) | |
801 | (stringp (car children))) | |
802 | (setcar children (concat prev-part expansion (car children)))) | |
803 | ((stringp expansion) | |
804 | (setq children (append (concat prev-part expansion) | |
805 | children))) | |
806 | ((stringp (car children)) | |
807 | (setcar children (concat (car children) prev-part)) | |
808 | (setq children (append expansion children))) | |
809 | (t | |
810 | (setq children (list expansion | |
811 | prev-part | |
812 | children)))) | |
813 | (setq point end-point))) | |
814 | (cond ((stringp children) | |
815 | (concat children (substring string point))) | |
816 | ((stringp (car (last children))) | |
a3110b5d | 817 | (concat (car (last children)) (substring string point))) |
6d12a4df MH |
818 | ((null children) |
819 | string) | |
820 | (t | |
a3110b5d MH |
821 | (concat (mapconcat 'identity |
822 | (nreverse children) | |
823 | "") | |
824 | (substring string point)))))) | |
825 | ||
571855b6 UJ |
826 | (defun xml-substitute-numeric-entities (string) |
827 | "Substitute SGML numeric entities by their respective utf characters. | |
828 | This function replaces numeric entities in the input STRING and | |
829 | returns the modified string. For example \"*\" gets replaced | |
830 | by \"*\"." | |
831 | (if (and string (stringp string)) | |
832 | (let ((start 0)) | |
833 | (while (string-match "&#\\([0-9]+\\);" string start) | |
834 | (condition-case nil | |
835 | (setq string (replace-match | |
836 | (string (read (substring string | |
837 | (match-beginning 1) | |
838 | (match-end 1)))) | |
839 | nil nil string)) | |
840 | (error nil)) | |
841 | (setq start (1+ (match-beginning 0)))) | |
842 | string) | |
843 | nil)) | |
844 | ||
47db06aa GM |
845 | ;;******************************************************************* |
846 | ;;** | |
847 | ;;** Printing a tree. | |
848 | ;;** This function is intended mainly for debugging purposes. | |
849 | ;;** | |
850 | ;;******************************************************************* | |
851 | ||
27240aa4 AS |
852 | (defun xml-debug-print (xml &optional indent-string) |
853 | "Outputs the XML in the current buffer. | |
854 | XML can be a tree or a list of nodes. | |
855 | The first line is indented with the optional INDENT-STRING." | |
856 | (setq indent-string (or indent-string "")) | |
971489ea | 857 | (dolist (node xml) |
27240aa4 AS |
858 | (xml-debug-print-internal node indent-string))) |
859 | ||
860 | (defalias 'xml-print 'xml-debug-print) | |
47db06aa | 861 | |
7731c9f4 | 862 | (defun xml-escape-string (string) |
a1884c78 MH |
863 | "Return the string with entity substitutions made from |
864 | xml-entity-alist." | |
7731c9f4 MH |
865 | (mapconcat (lambda (byte) |
866 | (let ((char (char-to-string byte))) | |
867 | (if (rassoc char xml-entity-alist) | |
868 | (concat "&" (car (rassoc char xml-entity-alist)) ";") | |
869 | char))) | |
76a6127f MH |
870 | ;; This differs from the non-unicode branch. Just |
871 | ;; grabbing the string works here. | |
872 | string "")) | |
7731c9f4 | 873 | |
971489ea | 874 | (defun xml-debug-print-internal (xml indent-string) |
47db06aa | 875 | "Outputs the XML tree in the current buffer. |
a98e819b | 876 | The first line is indented with INDENT-STRING." |
47db06aa GM |
877 | (let ((tree xml) |
878 | attlist) | |
a98e819b | 879 | (insert indent-string ?< (symbol-name (xml-node-name tree))) |
524425ae | 880 | |
47db06aa | 881 | ;; output the attribute list |
971489ea | 882 | (setq attlist (xml-node-attributes tree)) |
47db06aa | 883 | (while attlist |
7731c9f4 MH |
884 | (insert ?\ (symbol-name (caar attlist)) "=\"" |
885 | (xml-escape-string (cdar attlist)) ?\") | |
971489ea | 886 | (setq attlist (cdr attlist))) |
524425ae | 887 | |
971489ea | 888 | (setq tree (xml-node-children tree)) |
47db06aa | 889 | |
27240aa4 AS |
890 | (if (null tree) |
891 | (insert ?/ ?>) | |
892 | (insert ?>) | |
893 | ||
894 | ;; output the children | |
895 | (dolist (node tree) | |
896 | (cond | |
897 | ((listp node) | |
898 | (insert ?\n) | |
899 | (xml-debug-print-internal node (concat indent-string " "))) | |
7731c9f4 MH |
900 | ((stringp node) |
901 | (insert (xml-escape-string node))) | |
27240aa4 AS |
902 | (t |
903 | (error "Invalid XML tree")))) | |
904 | ||
905 | (when (not (and (null (cdr tree)) | |
906 | (stringp (car tree)))) | |
907 | (insert ?\n indent-string)) | |
908 | (insert ?< ?/ (symbol-name (xml-node-name xml)) ?>)))) | |
47db06aa GM |
909 | |
910 | (provide 'xml) | |
911 | ||
8a02e193 | 912 | ;; arch-tag: 5864b283-5a68-4b59-a20d-36a72b353b9b |
47db06aa | 913 | ;;; xml.el ends here |