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1cd7adc6 | 1 | ;;; xml.el --- XML parser |
47db06aa | 2 | |
acaf905b | 3 | ;; Copyright (C) 2000-2012 Free Software Foundation, Inc. |
47db06aa GM |
4 | |
5 | ;; Author: Emmanuel Briot <briot@gnat.com> | |
720058f2 | 6 | ;; Maintainer: Mark A. Hershberger <mah@everybody.org> |
a98e819b | 7 | ;; Keywords: xml, data |
47db06aa GM |
8 | |
9 | ;; This file is part of GNU Emacs. | |
10 | ||
eb3fa2cf | 11 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
47db06aa | 12 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
13 | ;; the Free Software Foundation, either version 3 of the License, or |
14 | ;; (at your option) any later version. | |
47db06aa GM |
15 | |
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
eb3fa2cf | 22 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
47db06aa GM |
23 | |
24 | ;;; Commentary: | |
25 | ||
a98e819b DL |
26 | ;; This file contains a somewhat incomplete non-validating XML parser. It |
27 | ;; parses a file, and returns a list that can be used internally by | |
a1dfa9a3 | 28 | ;; any other Lisp libraries. |
47db06aa GM |
29 | |
30 | ;;; FILE FORMAT | |
31 | ||
a98e819b DL |
32 | ;; The document type declaration may either be ignored or (optionally) |
33 | ;; parsed, but currently the parsing will only accept element | |
a1dfa9a3 | 34 | ;; declarations. The XML file is assumed to be well-formed. In case |
a98e819b DL |
35 | ;; of error, the parsing stops and the XML file is shown where the |
36 | ;; parsing stopped. | |
47db06aa | 37 | ;; |
a98e819b | 38 | ;; It also knows how to ignore comments and processing instructions. |
47db06aa GM |
39 | ;; |
40 | ;; The XML file should have the following format: | |
653558a1 GM |
41 | ;; <node1 attr1="name1" attr2="name2" ...>value |
42 | ;; <node2 attr3="name3" attr4="name4">value2</node2> | |
43 | ;; <node3 attr5="name5" attr6="name6">value3</node3> | |
47db06aa | 44 | ;; </node1> |
a1dfa9a3 | 45 | ;; Of course, the name of the nodes and attributes can be anything. There can |
47db06aa GM |
46 | ;; be any number of attributes (or none), as well as any number of children |
47 | ;; below the nodes. | |
48 | ;; | |
49 | ;; There can be only top level node, but with any number of children below. | |
50 | ||
51 | ;;; LIST FORMAT | |
52 | ||
c7f8d055 SM |
53 | ;; The functions `xml-parse-file', `xml-parse-region' and |
54 | ;; `xml-parse-tag' return a list with the following format: | |
47db06aa GM |
55 | ;; |
56 | ;; xml-list ::= (node node ...) | |
c7f8d055 | 57 | ;; node ::= (qname attribute-list . child_node_list) |
47db06aa GM |
58 | ;; child_node_list ::= child_node child_node ... |
59 | ;; child_node ::= node | string | |
c7f8d055 SM |
60 | ;; qname ::= (:namespace-uri . "name") | "name" |
61 | ;; attribute_list ::= ((qname . "value") (qname . "value") ...) | |
47db06aa GM |
62 | ;; | nil |
63 | ;; string ::= "..." | |
64 | ;; | |
a98e819b DL |
65 | ;; Some macros are provided to ease the parsing of this list. |
66 | ;; Whitespace is preserved. Fixme: There should be a tree-walker that | |
67 | ;; can remove it. | |
47db06aa | 68 | |
c7f8d055 SM |
69 | ;; TODO: |
70 | ;; * xml:base, xml:space support | |
71 | ;; * more complete DOCTYPE parsing | |
72 | ;; * pi support | |
73 | ||
47db06aa GM |
74 | ;;; Code: |
75 | ||
f6fcdfff CY |
76 | ;; Note that buffer-substring and match-string were formerly used in |
77 | ;; several places, because the -no-properties variants remove | |
78 | ;; composition info. However, after some discussion on emacs-devel, | |
79 | ;; the consensus was that the speed of the -no-properties variants was | |
80 | ;; a worthwhile tradeoff especially since we're usually parsing files | |
81 | ;; instead of hand-crafted XML. | |
a98e819b | 82 | |
47db06aa GM |
83 | ;;******************************************************************* |
84 | ;;** | |
85 | ;;** Macros to parse the list | |
86 | ;;** | |
87 | ;;******************************************************************* | |
88 | ||
f8ab034e MH |
89 | (defconst xml-undefined-entity "?" |
90 | "What to substitute for undefined entities") | |
91 | ||
6d12a4df MH |
92 | (defvar xml-entity-alist |
93 | '(("lt" . "<") | |
94 | ("gt" . ">") | |
95 | ("apos" . "'") | |
96 | ("quot" . "\"") | |
97 | ("amp" . "&")) | |
98 | "The defined entities. Entities are added to this when the DTD is parsed.") | |
99 | ||
100 | (defvar xml-sub-parser nil | |
101 | "Dynamically set this to a non-nil value if you want to parse an XML fragment.") | |
102 | ||
103 | (defvar xml-validating-parser nil | |
104 | "Set to non-nil to get validity checking.") | |
105 | ||
971489ea | 106 | (defsubst xml-node-name (node) |
47db06aa | 107 | "Return the tag associated with NODE. |
a1dfa9a3 SM |
108 | Without namespace-aware parsing, the tag is a symbol. |
109 | ||
110 | With namespace-aware parsing, the tag is a cons of a string | |
111 | representing the uri of the namespace with the local name of the | |
112 | tag. For example, | |
113 | ||
114 | <foo> | |
115 | ||
116 | would be represented by | |
117 | ||
118 | '(\"\" . \"foo\")." | |
119 | ||
971489ea | 120 | (car node)) |
47db06aa | 121 | |
971489ea | 122 | (defsubst xml-node-attributes (node) |
47db06aa GM |
123 | "Return the list of attributes of NODE. |
124 | The list can be nil." | |
971489ea | 125 | (nth 1 node)) |
47db06aa | 126 | |
971489ea | 127 | (defsubst xml-node-children (node) |
47db06aa GM |
128 | "Return the list of children of NODE. |
129 | This is a list of nodes, and it can be nil." | |
971489ea | 130 | (cddr node)) |
47db06aa GM |
131 | |
132 | (defun xml-get-children (node child-name) | |
133 | "Return the children of NODE whose tag is CHILD-NAME. | |
a1dfa9a3 | 134 | CHILD-NAME should match the value returned by `xml-node-name'." |
971489ea SM |
135 | (let ((match ())) |
136 | (dolist (child (xml-node-children node)) | |
a1dfa9a3 SM |
137 | (if (and (listp child) |
138 | (equal (xml-node-name child) child-name)) | |
139 | (push child match))) | |
971489ea | 140 | (nreverse match))) |
47db06aa | 141 | |
9bcd6a7e | 142 | (defun xml-get-attribute-or-nil (node attribute) |
47db06aa | 143 | "Get from NODE the value of ATTRIBUTE. |
a1dfa9a3 | 144 | Return nil if the attribute was not found. |
9bcd6a7e EZ |
145 | |
146 | See also `xml-get-attribute'." | |
2e9bdf15 | 147 | (cdr (assoc attribute (xml-node-attributes node)))) |
9bcd6a7e EZ |
148 | |
149 | (defsubst xml-get-attribute (node attribute) | |
150 | "Get from NODE the value of ATTRIBUTE. | |
151 | An empty string is returned if the attribute was not found. | |
152 | ||
153 | See also `xml-get-attribute-or-nil'." | |
154 | (or (xml-get-attribute-or-nil node attribute) "")) | |
47db06aa GM |
155 | |
156 | ;;******************************************************************* | |
157 | ;;** | |
158 | ;;** Creating the list | |
159 | ;;** | |
160 | ;;******************************************************************* | |
161 | ||
a98e819b | 162 | ;;;###autoload |
2d42509a | 163 | (defun xml-parse-file (file &optional parse-dtd parse-ns) |
a98e819b DL |
164 | "Parse the well-formed XML file FILE. |
165 | If FILE is already visited, use its buffer and don't kill it. | |
47db06aa | 166 | Returns the top node with all its children. |
2d42509a JB |
167 | If PARSE-DTD is non-nil, the DTD is parsed rather than skipped. |
168 | If PARSE-NS is non-nil, then QNAMES are expanded." | |
882cb60d RS |
169 | (if (get-file-buffer file) |
170 | (with-current-buffer (get-file-buffer file) | |
171 | (save-excursion | |
172 | (xml-parse-region (point-min) | |
173 | (point-max) | |
174 | (current-buffer) | |
175 | parse-dtd parse-ns))) | |
176 | (with-temp-buffer | |
177 | (insert-file-contents file) | |
178 | (xml-parse-region (point-min) | |
179 | (point-max) | |
180 | (current-buffer) | |
181 | parse-dtd parse-ns)))) | |
47db06aa | 182 | |
6d12a4df | 183 | |
5ed32352 RS |
184 | (defvar xml-name-re) |
185 | (defvar xml-entity-value-re) | |
0bf41002 | 186 | (defvar xml-att-def-re) |
63b446bc | 187 | (let* ((start-chars (concat "[:alpha:]:_")) |
6d12a4df | 188 | (name-chars (concat "-[:digit:]." start-chars)) |
5178753d | 189 | ;;[3] S ::= (#x20 | #x9 | #xD | #xA)+ |
6d12a4df | 190 | (whitespace "[ \t\n\r]")) |
06b60517 | 191 | ;;[4] NameStartChar ::= ":" | [A-Z] | "_" | [a-z] | [#xC0-#xD6] |
5178753d MH |
192 | ;; | [#xD8-#xF6] | [#xF8-#x2FF] | [#x370-#x37D] | [#x37F-#x1FFF] |
193 | ;; | [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | |
194 | ;; | [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF] | |
6d12a4df | 195 | (defvar xml-name-start-char-re (concat "[" start-chars "]")) |
5178753d | 196 | ;;[4a] NameChar ::= NameStartChar | "-" | "." | [0-9] | #xB7 | [#x0300-#x036F] | [#x203F-#x2040] |
6d12a4df | 197 | (defvar xml-name-char-re (concat "[" name-chars "]")) |
5178753d | 198 | ;;[5] Name ::= NameStartChar (NameChar)* |
6d12a4df | 199 | (defvar xml-name-re (concat xml-name-start-char-re xml-name-char-re "*")) |
5178753d | 200 | ;;[6] Names ::= Name (#x20 Name)* |
6d12a4df | 201 | (defvar xml-names-re (concat xml-name-re "\\(?: " xml-name-re "\\)*")) |
5178753d | 202 | ;;[7] Nmtoken ::= (NameChar)+ |
6d12a4df | 203 | (defvar xml-nmtoken-re (concat xml-name-char-re "+")) |
5178753d | 204 | ;;[8] Nmtokens ::= Nmtoken (#x20 Nmtoken)* |
6d12a4df | 205 | (defvar xml-nmtokens-re (concat xml-nmtoken-re "\\(?: " xml-name-re "\\)*")) |
5178753d | 206 | ;;[66] CharRef ::= '&#' [0-9]+ ';' | '&#x' [0-9a-fA-F]+ ';' |
6d12a4df | 207 | (defvar xml-char-ref-re "\\(?:&#[0-9]+;\\|&#x[0-9a-fA-F]+;\\)") |
5178753d | 208 | ;;[68] EntityRef ::= '&' Name ';' |
6d12a4df | 209 | (defvar xml-entity-ref (concat "&" xml-name-re ";")) |
5178753d | 210 | ;;[69] PEReference ::= '%' Name ';' |
6d12a4df | 211 | (defvar xml-pe-reference-re (concat "%" xml-name-re ";")) |
5178753d | 212 | ;;[67] Reference ::= EntityRef | CharRef |
6d12a4df | 213 | (defvar xml-reference-re (concat "\\(?:" xml-entity-ref "\\|" xml-char-ref-re "\\)")) |
5178753d | 214 | ;;[10] AttValue ::= '"' ([^<&"] | Reference)* '"' | "'" ([^<&'] | Reference)* "'" |
23d519e4 MH |
215 | (defvar xml-att-value-re (concat "\\(?:\"\\(?:[^&\"]\\|" xml-reference-re "\\)*\"\\|" |
216 | "'\\(?:[^&']\\|" xml-reference-re "\\)*'\\)")) | |
5178753d MH |
217 | ;;[56] TokenizedType ::= 'ID' [VC: ID] [VC: One ID per Element Type] [VC: ID Attribute Default] |
218 | ;; | 'IDREF' [VC: IDREF] | |
219 | ;; | 'IDREFS' [VC: IDREF] | |
220 | ;; | 'ENTITY' [VC: Entity Name] | |
221 | ;; | 'ENTITIES' [VC: Entity Name] | |
222 | ;; | 'NMTOKEN' [VC: Name Token] | |
223 | ;; | 'NMTOKENS' [VC: Name Token] | |
23d519e4 | 224 | (defvar xml-tokenized-type-re "\\(?:ID\\|IDREF\\|IDREFS\\|ENTITY\\|ENTITIES\\|NMTOKEN\\|NMTOKENS\\)") |
5178753d | 225 | ;;[58] NotationType ::= 'NOTATION' S '(' S? Name (S? '|' S? Name)* S? ')' |
23d519e4 MH |
226 | (defvar xml-notation-type-re (concat "\\(?:NOTATION" whitespace "(" whitespace "*" xml-name-re |
227 | "\\(?:" whitespace "*|" whitespace "*" xml-name-re "\\)*" whitespace "*)\\)")) | |
5178753d | 228 | ;;[59] Enumeration ::= '(' S? Nmtoken (S? '|' S? Nmtoken)* S? ')' [VC: Enumeration] [VC: No Duplicate Tokens] |
06b60517 | 229 | (defvar xml-enumeration-re (concat "\\(?:(" whitespace "*" xml-nmtoken-re |
23d519e4 MH |
230 | "\\(?:" whitespace "*|" whitespace "*" xml-nmtoken-re "\\)*" |
231 | whitespace ")\\)")) | |
5178753d | 232 | ;;[57] EnumeratedType ::= NotationType | Enumeration |
23d519e4 | 233 | (defvar xml-enumerated-type-re (concat "\\(?:" xml-notation-type-re "\\|" xml-enumeration-re "\\)")) |
5178753d MH |
234 | ;;[54] AttType ::= StringType | TokenizedType | EnumeratedType |
235 | ;;[55] StringType ::= 'CDATA' | |
23d519e4 | 236 | (defvar xml-att-type-re (concat "\\(?:CDATA\\|" xml-tokenized-type-re "\\|" xml-notation-type-re"\\|" xml-enumerated-type-re "\\)")) |
5178753d | 237 | ;;[60] DefaultDecl ::= '#REQUIRED' | '#IMPLIED' | (('#FIXED' S)? AttValue) |
23d519e4 | 238 | (defvar xml-default-decl-re (concat "\\(?:#REQUIRED\\|#IMPLIED\\|\\(?:#FIXED" whitespace "\\)*" xml-att-value-re "\\)")) |
5178753d | 239 | ;;[53] AttDef ::= S Name S AttType S DefaultDecl |
23d519e4 MH |
240 | (defvar xml-att-def-re (concat "\\(?:" whitespace "*" xml-name-re |
241 | whitespace "*" xml-att-type-re | |
242 | whitespace "*" xml-default-decl-re "\\)")) | |
5178753d MH |
243 | ;;[9] EntityValue ::= '"' ([^%&"] | PEReference | Reference)* '"' |
244 | ;; | "'" ([^%&'] | PEReference | Reference)* "'" | |
6d12a4df MH |
245 | (defvar xml-entity-value-re (concat "\\(?:\"\\(?:[^%&\"]\\|" xml-pe-reference-re |
246 | "\\|" xml-reference-re "\\)*\"\\|'\\(?:[^%&']\\|" | |
247 | xml-pe-reference-re "\\|" xml-reference-re "\\)*'\\)"))) | |
248 | ;;[75] ExternalID ::= 'SYSTEM' S SystemLiteral | |
249 | ;; | 'PUBLIC' S PubidLiteral S SystemLiteral | |
06b60517 | 250 | ;;[76] NDataDecl ::= S 'NDATA' S |
6d12a4df MH |
251 | ;;[73] EntityDef ::= EntityValue| (ExternalID NDataDecl?) |
252 | ;;[71] GEDecl ::= '<!ENTITY' S Name S EntityDef S? '>' | |
253 | ;;[74] PEDef ::= EntityValue | ExternalID | |
254 | ;;[72] PEDecl ::= '<!ENTITY' S '%' S Name S PEDef S? '>' | |
255 | ;;[70] EntityDecl ::= GEDecl | PEDecl | |
256 | ||
a98e819b DL |
257 | ;; Note that this is setup so that we can do whitespace-skipping with |
258 | ;; `(skip-syntax-forward " ")', inter alia. Previously this was slow | |
259 | ;; compared with `re-search-forward', but that has been fixed. Also | |
260 | ;; note that the standard syntax table contains other characters with | |
261 | ;; whitespace syntax, like NBSP, but they are invalid in contexts in | |
262 | ;; which we might skip whitespace -- specifically, they're not | |
263 | ;; NameChars [XML 4]. | |
264 | ||
265 | (defvar xml-syntax-table | |
266 | (let ((table (make-syntax-table))) | |
267 | ;; Get space syntax correct per XML [3]. | |
268 | (dotimes (c 31) | |
269 | (modify-syntax-entry c "." table)) ; all are space in standard table | |
5178753d | 270 | (dolist (c '(?\t ?\n ?\r)) ; these should be space |
a98e819b DL |
271 | (modify-syntax-entry c " " table)) |
272 | ;; For skipping attributes. | |
273 | (modify-syntax-entry ?\" "\"" table) | |
274 | (modify-syntax-entry ?' "\"" table) | |
275 | ;; Non-alnum name chars should be symbol constituents (`-' and `_' | |
276 | ;; are OK by default). | |
277 | (modify-syntax-entry ?. "_" table) | |
278 | (modify-syntax-entry ?: "_" table) | |
279 | ;; XML [89] | |
aaaa8abb MH |
280 | (unless (featurep 'xemacs) |
281 | (dolist (c '(#x00B7 #x02D0 #x02D1 #x0387 #x0640 #x0E46 #x0EC6 #x3005 | |
282 | #x3031 #x3032 #x3033 #x3034 #x3035 #x309D #x309E #x30FC | |
283 | #x30FD #x30FE)) | |
284 | (modify-syntax-entry (decode-char 'ucs c) "w" table))) | |
a98e819b DL |
285 | ;; Fixme: rest of [4] |
286 | table) | |
287 | "Syntax table used by `xml-parse-region'.") | |
288 | ||
289 | ;; XML [5] | |
290 | ;; Note that [:alpha:] matches all multibyte chars with word syntax. | |
ab161457 JPW |
291 | (eval-and-compile |
292 | (defconst xml-name-regexp "[[:alpha:]_:][[:alnum:]._:-]*")) | |
a98e819b DL |
293 | |
294 | ;; Fixme: This needs re-writing to deal with the XML grammar properly, i.e. | |
295 | ;; document ::= prolog element Misc* | |
296 | ;; prolog ::= XMLDecl? Misc* (doctypedecl Misc*)? | |
297 | ||
298 | ;;;###autoload | |
2d42509a | 299 | (defun xml-parse-region (beg end &optional buffer parse-dtd parse-ns) |
47db06aa GM |
300 | "Parse the region from BEG to END in BUFFER. |
301 | If BUFFER is nil, it defaults to the current buffer. | |
302 | Returns the XML list for the region, or raises an error if the region | |
2d42509a | 303 | is not well-formed XML. |
47db06aa | 304 | If PARSE-DTD is non-nil, the DTD is parsed rather than skipped, |
2d42509a JB |
305 | and returned as the first element of the list. |
306 | If PARSE-NS is non-nil, then QNAMES are expanded." | |
39d58fc0 MH |
307 | ;; Use fixed syntax table to ensure regexp char classes and syntax |
308 | ;; specs DTRT. | |
309 | (with-syntax-table (standard-syntax-table) | |
310 | (let ((case-fold-search nil) ; XML is case-sensitive. | |
311 | xml result dtd) | |
312 | (save-excursion | |
313 | (if buffer | |
314 | (set-buffer buffer)) | |
315 | (save-restriction | |
316 | (narrow-to-region beg end) | |
a98e819b DL |
317 | (goto-char (point-min)) |
318 | (while (not (eobp)) | |
319 | (if (search-forward "<" nil t) | |
320 | (progn | |
321 | (forward-char -1) | |
34638996 | 322 | (setq result (xml-parse-tag parse-dtd parse-ns)) |
01b229d1 CY |
323 | (cond |
324 | ((null result) | |
325 | ;; Not looking at an xml start tag. | |
18edb22d CY |
326 | (unless (eobp) |
327 | (forward-char 1))) | |
01b229d1 CY |
328 | ((and xml (not xml-sub-parser)) |
329 | ;; Translation of rule [1] of XML specifications | |
330 | (error "XML: (Not Well-Formed) Only one root tag allowed")) | |
331 | ((and (listp (car result)) | |
332 | parse-dtd) | |
333 | (setq dtd (car result)) | |
334 | (if (cdr result) ; possible leading comment | |
335 | (add-to-list 'xml (cdr result)))) | |
336 | (t | |
337 | (add-to-list 'xml result)))) | |
a98e819b DL |
338 | (goto-char (point-max)))) |
339 | (if parse-dtd | |
340 | (cons dtd (nreverse xml)) | |
341 | (nreverse xml))))))) | |
47db06aa | 342 | |
c7f8d055 | 343 | (defun xml-maybe-do-ns (name default xml-ns) |
a1dfa9a3 SM |
344 | "Perform any namespace expansion. |
345 | NAME is the name to perform the expansion on. | |
c7f8d055 SM |
346 | DEFAULT is the default namespace. XML-NS is a cons of namespace |
347 | names to uris. When namespace-aware parsing is off, then XML-NS | |
348 | is nil. | |
349 | ||
350 | During namespace-aware parsing, any name without a namespace is | |
351 | put into the namespace identified by DEFAULT. nil is used to | |
352 | specify that the name shouldn't be given a namespace." | |
353 | (if (consp xml-ns) | |
354 | (let* ((nsp (string-match ":" name)) | |
355 | (lname (if nsp (substring name (match-end 0)) name)) | |
356 | (prefix (if nsp (substring name 0 (match-beginning 0)) default)) | |
357 | (special (and (string-equal lname "xmlns") (not prefix))) | |
358 | ;; Setting default to nil will insure that there is not | |
359 | ;; matching cons in xml-ns. In which case we | |
360 | (ns (or (cdr (assoc (if special "xmlns" prefix) | |
361 | xml-ns)) | |
6d12a4df | 362 | ""))) |
c7f8d055 SM |
363 | (cons ns (if special "" lname))) |
364 | (intern name))) | |
47db06aa | 365 | |
6d12a4df MH |
366 | (defun xml-parse-fragment (&optional parse-dtd parse-ns) |
367 | "Parse xml-like fragments." | |
368 | (let ((xml-sub-parser t) | |
369 | children) | |
370 | (while (not (eobp)) | |
371 | (let ((bit (xml-parse-tag | |
372 | parse-dtd parse-ns))) | |
373 | (if children | |
374 | (setq children (append (list bit) children)) | |
375 | (if (stringp bit) | |
376 | (setq children (list bit)) | |
377 | (setq children bit))))) | |
378 | (reverse children))) | |
379 | ||
2d42509a | 380 | (defun xml-parse-tag (&optional parse-dtd parse-ns) |
a98e819b | 381 | "Parse the tag at point. |
47db06aa GM |
382 | If PARSE-DTD is non-nil, the DTD of the document, if any, is parsed and |
383 | returned as the first element in the list. | |
2d42509a | 384 | If PARSE-NS is non-nil, then QNAMES are expanded. |
47db06aa | 385 | Returns one of: |
a98e819b DL |
386 | - a list : the matching node |
387 | - nil : the point is not looking at a tag. | |
388 | - a pair : the first element is the DTD, the second is the node." | |
6d12a4df MH |
389 | (let ((xml-validating-parser (or parse-dtd xml-validating-parser)) |
390 | (xml-ns (if (consp parse-ns) | |
2d42509a JB |
391 | parse-ns |
392 | (if parse-ns | |
393 | (list | |
5178753d | 394 | ;; Default for empty prefix is no namespace |
6d12a4df | 395 | (cons "" "") |
c7f8d055 | 396 | ;; "xml" namespace |
6d12a4df | 397 | (cons "xml" "http://www.w3.org/XML/1998/namespace") |
2d42509a | 398 | ;; We need to seed the xmlns namespace |
6d12a4df | 399 | (cons "xmlns" "http://www.w3.org/2000/xmlns/")))))) |
2d42509a JB |
400 | (cond |
401 | ;; Processing instructions (like the <?xml version="1.0"?> tag at the | |
402 | ;; beginning of a document). | |
403 | ((looking-at "<\\?") | |
404 | (search-forward "?>") | |
405 | (skip-syntax-forward " ") | |
406 | (xml-parse-tag parse-dtd xml-ns)) | |
407 | ;; Character data (CDATA) sections, in which no tag should be interpreted | |
408 | ((looking-at "<!\\[CDATA\\[") | |
409 | (let ((pos (match-end 0))) | |
410 | (unless (search-forward "]]>" nil t) | |
6d12a4df | 411 | (error "XML: (Not Well Formed) CDATA section does not end anywhere in the document")) |
ae026110 | 412 | (concat |
f6fcdfff | 413 | (buffer-substring-no-properties pos (match-beginning 0)) |
ae026110 | 414 | (xml-parse-string)))) |
2d42509a JB |
415 | ;; DTD for the document |
416 | ((looking-at "<!DOCTYPE") | |
6d12a4df MH |
417 | (let ((dtd (xml-parse-dtd parse-ns))) |
418 | (skip-syntax-forward " ") | |
419 | (if xml-validating-parser | |
420 | (cons dtd (xml-parse-tag nil xml-ns)) | |
421 | (xml-parse-tag nil xml-ns)))) | |
2d42509a JB |
422 | ;; skip comments |
423 | ((looking-at "<!--") | |
424 | (search-forward "-->") | |
a268160b | 425 | (skip-syntax-forward " ") |
18edb22d CY |
426 | (unless (eobp) |
427 | (xml-parse-tag parse-dtd xml-ns))) | |
2d42509a JB |
428 | ;; end tag |
429 | ((looking-at "</") | |
430 | '()) | |
431 | ;; opening tag | |
432 | ((looking-at "<\\([^/>[:space:]]+\\)") | |
433 | (goto-char (match-end 1)) | |
34638996 EZ |
434 | |
435 | ;; Parse this node | |
f6fcdfff | 436 | (let* ((node-name (match-string-no-properties 1)) |
5178753d MH |
437 | ;; Parse the attribute list. |
438 | (attrs (xml-parse-attlist xml-ns)) | |
06b60517 | 439 | children) |
c7f8d055 | 440 | |
5178753d MH |
441 | ;; add the xmlns:* attrs to our cache |
442 | (when (consp xml-ns) | |
c7f8d055 SM |
443 | (dolist (attr attrs) |
444 | (when (and (consp (car attr)) | |
6d12a4df MH |
445 | (equal "http://www.w3.org/2000/xmlns/" |
446 | (caar attr))) | |
447 | (push (cons (cdar attr) (cdr attr)) | |
c7f8d055 SM |
448 | xml-ns)))) |
449 | ||
5178753d | 450 | (setq children (list attrs (xml-maybe-do-ns node-name "" xml-ns))) |
c7f8d055 | 451 | |
2d42509a JB |
452 | ;; is this an empty element ? |
453 | (if (looking-at "/>") | |
47db06aa | 454 | (progn |
6d12a4df | 455 | (forward-char 2) |
971489ea | 456 | (nreverse children)) |
6d12a4df MH |
457 | |
458 | ;; is this a valid start tag ? | |
459 | (if (eq (char-after) ?>) | |
460 | (progn | |
461 | (forward-char 1) | |
462 | ;; Now check that we have the right end-tag. Note that this | |
463 | ;; one might contain spaces after the tag name | |
464 | (let ((end (concat "</" node-name "\\s-*>"))) | |
465 | (while (not (looking-at end)) | |
466 | (cond | |
467 | ((looking-at "</") | |
468 | (error "XML: (Not Well-Formed) Invalid end tag (expecting %s) at pos %d" | |
469 | node-name (point))) | |
470 | ((= (char-after) ?<) | |
471 | (let ((tag (xml-parse-tag nil xml-ns))) | |
472 | (when tag | |
473 | (push tag children)))) | |
474 | (t | |
475 | (let ((expansion (xml-parse-string))) | |
476 | (setq children | |
477 | (if (stringp expansion) | |
478 | (if (stringp (car children)) | |
479 | ;; The two strings were separated by a comment. | |
aaaa8abb | 480 | (setq children (append (list (concat (car children) expansion)) |
6d12a4df MH |
481 | (cdr children))) |
482 | (setq children (append (list expansion) children))) | |
483 | (setq children (append expansion children)))))))) | |
484 | ||
485 | (goto-char (match-end 0)) | |
486 | (nreverse children))) | |
487 | ;; This was an invalid start tag (Expected ">", but didn't see it.) | |
488 | (error "XML: (Well-Formed) Couldn't parse tag: %s" | |
f6fcdfff | 489 | (buffer-substring-no-properties (- (point) 10) (+ (point) 1))))))) |
6d12a4df MH |
490 | (t ;; (Not one of PI, CDATA, Comment, End tag, or Start tag) |
491 | (unless xml-sub-parser ; Usually, we error out. | |
492 | (error "XML: (Well-Formed) Invalid character")) | |
493 | ||
494 | ;; However, if we're parsing incrementally, then we need to deal | |
495 | ;; with stray CDATA. | |
496 | (xml-parse-string))))) | |
497 | ||
498 | (defun xml-parse-string () | |
499 | "Parse the next whatever. Could be a string, or an element." | |
5178753d | 500 | (let* ((pos (point)) |
98b69232 | 501 | (string (progn (skip-chars-forward "^<") |
f6fcdfff | 502 | (buffer-substring-no-properties pos (point))))) |
5178753d MH |
503 | ;; Clean up the string. As per XML specifications, the XML |
504 | ;; processor should always pass the whole string to the | |
505 | ;; application. But \r's should be replaced: | |
506 | ;; http://www.w3.org/TR/2000/REC-xml-20001006#sec-line-ends | |
507 | (setq pos 0) | |
508 | (while (string-match "\r\n?" string pos) | |
509 | (setq string (replace-match "\n" t t string)) | |
510 | (setq pos (1+ (match-beginning 0)))) | |
511 | ||
512 | (xml-substitute-special string))) | |
47db06aa | 513 | |
c7f8d055 | 514 | (defun xml-parse-attlist (&optional xml-ns) |
a1dfa9a3 SM |
515 | "Return the attribute-list after point. |
516 | Leave point at the first non-blank character after the tag." | |
971489ea | 517 | (let ((attlist ()) |
34638996 | 518 | end-pos name) |
a98e819b DL |
519 | (skip-syntax-forward " ") |
520 | (while (looking-at (eval-when-compile | |
521 | (concat "\\(" xml-name-regexp "\\)\\s-*=\\s-*"))) | |
c7f8d055 | 522 | (setq end-pos (match-end 0)) |
f6fcdfff | 523 | (setq name (xml-maybe-do-ns (match-string-no-properties 1) nil xml-ns)) |
c7f8d055 | 524 | (goto-char end-pos) |
47db06aa | 525 | |
a158ff81 JB |
526 | ;; See also: http://www.w3.org/TR/2000/REC-xml-20001006#AVNormalize |
527 | ||
47db06aa GM |
528 | ;; Do we have a string between quotes (or double-quotes), |
529 | ;; or a simple word ? | |
a158ff81 | 530 | (if (looking-at "\"\\([^\"]*\\)\"") |
34638996 | 531 | (setq end-pos (match-end 0)) |
f0ec1711 | 532 | (if (looking-at "'\\([^']*\\)'") |
34638996 | 533 | (setq end-pos (match-end 0)) |
6d12a4df | 534 | (error "XML: (Not Well-Formed) Attribute values must be given between quotes"))) |
47db06aa GM |
535 | |
536 | ;; Each attribute must be unique within a given element | |
537 | (if (assoc name attlist) | |
6d12a4df | 538 | (error "XML: (Not Well-Formed) Each attribute must be unique within an element")) |
524425ae | 539 | |
a158ff81 JB |
540 | ;; Multiple whitespace characters should be replaced with a single one |
541 | ;; in the attributes | |
06b60517 | 542 | (let ((string (match-string-no-properties 1))) |
a98e819b | 543 | (replace-regexp-in-string "\\s-\\{2,\\}" " " string) |
6d12a4df MH |
544 | (let ((expansion (xml-substitute-special string))) |
545 | (unless (stringp expansion) | |
91af3942 | 546 | ; We say this is the constraint. It is actually that neither |
5178753d | 547 | ; external entities nor "<" can be in an attribute value. |
6d12a4df MH |
548 | (error "XML: (Not Well-Formed) Entities in attributes cannot expand into elements")) |
549 | (push (cons name expansion) attlist))) | |
a158ff81 | 550 | |
34638996 | 551 | (goto-char end-pos) |
a98e819b | 552 | (skip-syntax-forward " ")) |
971489ea | 553 | (nreverse attlist))) |
47db06aa GM |
554 | |
555 | ;;******************************************************************* | |
556 | ;;** | |
557 | ;;** The DTD (document type declaration) | |
558 | ;;** The following functions know how to skip or parse the DTD of | |
559 | ;;** a document | |
560 | ;;** | |
561 | ;;******************************************************************* | |
562 | ||
a98e819b DL |
563 | ;; Fixme: This fails at least if the DTD contains conditional sections. |
564 | ||
565 | (defun xml-skip-dtd () | |
566 | "Skip the DTD at point. | |
47db06aa | 567 | This follows the rule [28] in the XML specifications." |
6d12a4df MH |
568 | (let ((xml-validating-parser nil)) |
569 | (xml-parse-dtd))) | |
47db06aa | 570 | |
6d12a4df | 571 | (defun xml-parse-dtd (&optional parse-ns) |
a98e819b DL |
572 | "Parse the DTD at point." |
573 | (forward-char (eval-when-compile (length "<!DOCTYPE"))) | |
574 | (skip-syntax-forward " ") | |
6d12a4df MH |
575 | (if (and (looking-at ">") |
576 | xml-validating-parser) | |
577 | (error "XML: (Validity) Invalid DTD (expecting name of the document)")) | |
524425ae | 578 | |
971489ea | 579 | ;; Get the name of the document |
a98e819b | 580 | (looking-at xml-name-regexp) |
f6fcdfff | 581 | (let ((dtd (list (match-string-no-properties 0) 'dtd)) |
971489ea | 582 | type element end-pos) |
47db06aa GM |
583 | (goto-char (match-end 0)) |
584 | ||
a98e819b DL |
585 | (skip-syntax-forward " ") |
586 | ;; XML [75] | |
587 | (cond ((looking-at "PUBLIC\\s-+") | |
588 | (goto-char (match-end 0)) | |
589 | (unless (or (re-search-forward | |
590 | "\\=\"\\([[:space:][:alnum:]-'()+,./:=?;!*#@$_%]*\\)\"" | |
591 | nil t) | |
592 | (re-search-forward | |
593 | "\\='\\([[:space:][:alnum:]-()+,./:=?;!*#@$_%]*\\)'" | |
594 | nil t)) | |
6d12a4df | 595 | (error "XML: Missing Public ID")) |
f6fcdfff | 596 | (let ((pubid (match-string-no-properties 1))) |
6d12a4df | 597 | (skip-syntax-forward " ") |
a98e819b DL |
598 | (unless (or (re-search-forward "\\='\\([^']*\\)'" nil t) |
599 | (re-search-forward "\\=\"\\([^\"]*\\)\"" nil t)) | |
6d12a4df | 600 | (error "XML: Missing System ID")) |
f6fcdfff | 601 | (push (list pubid (match-string-no-properties 1) 'public) dtd))) |
a98e819b DL |
602 | ((looking-at "SYSTEM\\s-+") |
603 | (goto-char (match-end 0)) | |
604 | (unless (or (re-search-forward "\\='\\([^']*\\)'" nil t) | |
605 | (re-search-forward "\\=\"\\([^\"]*\\)\"" nil t)) | |
6d12a4df | 606 | (error "XML: Missing System ID")) |
f6fcdfff | 607 | (push (list (match-string-no-properties 1) 'system) dtd))) |
a98e819b DL |
608 | (skip-syntax-forward " ") |
609 | (if (eq ?> (char-after)) | |
610 | (forward-char) | |
a98e819b | 611 | (if (not (eq (char-after) ?\[)) |
6d12a4df | 612 | (error "XML: Bad DTD") |
a98e819b DL |
613 | (forward-char) |
614 | ;; Parse the rest of the DTD | |
23d519e4 | 615 | ;; Fixme: Deal with NOTATION, PIs. |
a98e819b DL |
616 | (while (not (looking-at "\\s-*\\]")) |
617 | (skip-syntax-forward " ") | |
618 | (cond | |
619 | ||
620 | ;; Translation of rule [45] of XML specifications | |
621 | ((looking-at | |
622 | "<!ELEMENT\\s-+\\([[:alnum:].%;]+\\)\\s-+\\([^>]+\\)>") | |
623 | ||
f6fcdfff | 624 | (setq element (match-string-no-properties 1) |
a98e819b DL |
625 | type (match-string-no-properties 2)) |
626 | (setq end-pos (match-end 0)) | |
627 | ||
628 | ;; Translation of rule [46] of XML specifications | |
629 | (cond | |
630 | ((string-match "^EMPTY[ \t\n\r]*$" type) ;; empty declaration | |
631 | (setq type 'empty)) | |
632 | ((string-match "^ANY[ \t\n\r]*$" type) ;; any type of contents | |
633 | (setq type 'any)) | |
634 | ((string-match "^(\\(.*\\))[ \t\n\r]*$" type) ;; children ([47]) | |
f6fcdfff | 635 | (setq type (xml-parse-elem-type (match-string-no-properties 1 type)))) |
a98e819b DL |
636 | ((string-match "^%[^;]+;[ \t\n\r]*$" type) ;; substitution |
637 | nil) | |
638 | (t | |
06b60517 | 639 | (if xml-validating-parser |
07f7e9ae | 640 | (error "XML: (Validity) Invalid element type in the DTD")))) |
27720433 | 641 | |
a98e819b | 642 | ;; rule [45]: the element declaration must be unique |
6d12a4df MH |
643 | (if (and (assoc element dtd) |
644 | xml-validating-parser) | |
645 | (error "XML: (Validity) Element declarations must be unique in a DTD (<%s>)" | |
461f3ad0 | 646 | element)) |
a98e819b DL |
647 | |
648 | ;; Store the element in the DTD | |
649 | (push (list element type) dtd) | |
650 | (goto-char end-pos)) | |
23d519e4 MH |
651 | |
652 | ;; Translation of rule [52] of XML specifications | |
653 | ((looking-at (concat "<!ATTLIST[ \t\n\r]*\\(" xml-name-re | |
654 | "\\)[ \t\n\r]*\\(" xml-att-def-re | |
655 | "\\)*[ \t\n\r]*>")) | |
656 | ||
657 | ;; We don't do anything with ATTLIST currently | |
658 | (goto-char (match-end 0))) | |
659 | ||
a98e819b DL |
660 | ((looking-at "<!--") |
661 | (search-forward "-->")) | |
6d12a4df MH |
662 | ((looking-at (concat "<!ENTITY[ \t\n\r]*\\(" xml-name-re |
663 | "\\)[ \t\n\r]*\\(" xml-entity-value-re | |
664 | "\\)[ \t\n\r]*>")) | |
f6fcdfff CY |
665 | (let ((name (match-string-no-properties 1)) |
666 | (value (substring (match-string-no-properties 2) 1 | |
667 | (- (length (match-string-no-properties 2)) 1)))) | |
23d519e4 | 668 | (goto-char (match-end 0)) |
6d12a4df MH |
669 | (setq xml-entity-alist |
670 | (append xml-entity-alist | |
06b60517 | 671 | (list (cons name |
6d12a4df MH |
672 | (with-temp-buffer |
673 | (insert value) | |
674 | (goto-char (point-min)) | |
675 | (xml-parse-fragment | |
676 | xml-validating-parser | |
677 | parse-ns)))))))) | |
678 | ((or (looking-at (concat "<!ENTITY[ \t\n\r]+\\(" xml-name-re | |
679 | "\\)[ \t\n\r]+SYSTEM[ \t\n\r]+" | |
680 | "\\(\"[^\"]*\"\\|'[^']*'\\)[ \t\n\r]*>")) | |
681 | (looking-at (concat "<!ENTITY[ \t\n\r]+\\(" xml-name-re | |
682 | "\\)[ \t\n\r]+PUBLIC[ \t\n\r]+" | |
683 | "\"[- \r\na-zA-Z0-9'()+,./:=?;!*#@$_%]*\"" | |
684 | "\\|'[- \r\na-zA-Z0-9()+,./:=?;!*#@$_%]*'" | |
685 | "[ \t\n\r]+\\(\"[^\"]*\"\\|'[^']*'\\)" | |
686 | "[ \t\n\r]*>"))) | |
f6fcdfff CY |
687 | (let ((name (match-string-no-properties 1)) |
688 | (file (substring (match-string-no-properties 2) 1 | |
689 | (- (length (match-string-no-properties 2)) 1)))) | |
23d519e4 | 690 | (goto-char (match-end 0)) |
6d12a4df MH |
691 | (setq xml-entity-alist |
692 | (append xml-entity-alist | |
693 | (list (cons name (with-temp-buffer | |
694 | (insert-file-contents file) | |
695 | (goto-char (point-min)) | |
696 | (xml-parse-fragment | |
697 | xml-validating-parser | |
698 | parse-ns)))))))) | |
63b446bc MH |
699 | ;; skip parameter entity declarations |
700 | ((or (looking-at (concat "<!ENTITY[ \t\n\r]+%[ \t\n\r]+\\(" xml-name-re | |
701 | "\\)[ \t\n\r]+SYSTEM[ \t\n\r]+" | |
702 | "\\(\"[^\"]*\"\\|'[^']*'\\)[ \t\n\r]*>")) | |
703 | (looking-at (concat "<!ENTITY[ \t\n\r]+" | |
704 | "%[ \t\n\r]+" | |
705 | "\\(" xml-name-re "\\)[ \t\n\r]+" | |
706 | "PUBLIC[ \t\n\r]+" | |
707 | "\\(\"[- \r\na-zA-Z0-9'()+,./:=?;!*#@$_%]*\"" | |
708 | "\\|'[- \r\na-zA-Z0-9()+,./:=?;!*#@$_%]*'\\)[ \t\n\r]+" | |
709 | "\\(\"[^\"]+\"\\|'[^']+'\\)" | |
710 | "[ \t\n\r]*>"))) | |
711 | (goto-char (match-end 0))) | |
712 | ;; skip parameter entities | |
713 | ((looking-at (concat "%" xml-name-re ";")) | |
714 | (goto-char (match-end 0))) | |
a98e819b | 715 | (t |
7e0f1123 | 716 | (when xml-validating-parser |
27720433 | 717 | (error "XML: (Validity) Invalid DTD item")))))) |
6d12a4df | 718 | (if (looking-at "\\s-*]>") |
23d519e4 | 719 | (goto-char (match-end 0)))) |
461f3ad0 | 720 | (nreverse dtd))) |
47db06aa GM |
721 | |
722 | (defun xml-parse-elem-type (string) | |
a98e819b | 723 | "Convert element type STRING into a Lisp structure." |
47db06aa GM |
724 | |
725 | (let (elem modifier) | |
726 | (if (string-match "(\\([^)]+\\))\\([+*?]?\\)" string) | |
727 | (progn | |
f6fcdfff CY |
728 | (setq elem (match-string-no-properties 1 string) |
729 | modifier (match-string-no-properties 2 string)) | |
47db06aa | 730 | (if (string-match "|" elem) |
971489ea | 731 | (setq elem (cons 'choice |
47db06aa GM |
732 | (mapcar 'xml-parse-elem-type |
733 | (split-string elem "|")))) | |
734 | (if (string-match "," elem) | |
971489ea | 735 | (setq elem (cons 'seq |
47db06aa | 736 | (mapcar 'xml-parse-elem-type |
a98e819b | 737 | (split-string elem ","))))))) |
a158ff81 | 738 | (if (string-match "[ \t\n\r]*\\([^+*?]+\\)\\([+*?]?\\)" string) |
f6fcdfff CY |
739 | (setq elem (match-string-no-properties 1 string) |
740 | modifier (match-string-no-properties 2 string)))) | |
47db06aa | 741 | |
971489ea SM |
742 | (if (and (stringp elem) (string= elem "#PCDATA")) |
743 | (setq elem 'pcdata)) | |
524425ae | 744 | |
971489ea SM |
745 | (cond |
746 | ((string= modifier "+") | |
747 | (list '+ elem)) | |
748 | ((string= modifier "*") | |
749 | (list '* elem)) | |
750 | ((string= modifier "?") | |
0fa6f70c | 751 | (list '\? elem)) |
971489ea SM |
752 | (t |
753 | elem)))) | |
47db06aa | 754 | |
47db06aa GM |
755 | ;;******************************************************************* |
756 | ;;** | |
757 | ;;** Substituting special XML sequences | |
758 | ;;** | |
759 | ;;******************************************************************* | |
760 | ||
761 | (defun xml-substitute-special (string) | |
cd1181db | 762 | "Return STRING, after substituting entity references." |
a98e819b DL |
763 | ;; This originally made repeated passes through the string from the |
764 | ;; beginning, which isn't correct, since then either "&amp;" or | |
765 | ;; "&amp;" won't DTRT. | |
47db06aa | 766 | |
6d12a4df MH |
767 | (let ((point 0) |
768 | children end-point) | |
ae026110 | 769 | (while (string-match "&\\([^;]*\\);" string point) |
6d12a4df | 770 | (setq end-point (match-end 0)) |
f6fcdfff | 771 | (let* ((this-part (match-string-no-properties 1 string)) |
6d12a4df MH |
772 | (prev-part (substring string point (match-beginning 0))) |
773 | (entity (assoc this-part xml-entity-alist)) | |
06b60517 | 774 | (expansion |
6d12a4df MH |
775 | (cond ((string-match "#\\([0-9]+\\)" this-part) |
776 | (let ((c (decode-char | |
777 | 'ucs | |
f6fcdfff | 778 | (string-to-number (match-string-no-properties 1 this-part))))) |
6d12a4df MH |
779 | (if c (string c)))) |
780 | ((string-match "#x\\([[:xdigit:]]+\\)" this-part) | |
781 | (let ((c (decode-char | |
782 | 'ucs | |
f6fcdfff | 783 | (string-to-number (match-string-no-properties 1 this-part) 16)))) |
6d12a4df MH |
784 | (if c (string c)))) |
785 | (entity | |
786 | (cdr entity)) | |
ae026110 | 787 | ((eq (length this-part) 0) |
27720433 | 788 | (error "XML: (Not Well-Formed) No entity given")) |
6d12a4df | 789 | (t |
f8ab034e | 790 | (if xml-validating-parser |
6d12a4df | 791 | (error "XML: (Validity) Undefined entity `%s'" |
f8ab034e MH |
792 | this-part) |
793 | xml-undefined-entity))))) | |
6d12a4df MH |
794 | |
795 | (cond ((null children) | |
f0d49437 MH |
796 | ;; FIXME: If we have an entity that expands into XML, this won't work. |
797 | (setq children | |
798 | (concat prev-part expansion))) | |
6d12a4df MH |
799 | ((stringp children) |
800 | (if (stringp expansion) | |
801 | (setq children (concat children prev-part expansion)) | |
802 | (setq children (list expansion (concat prev-part children))))) | |
803 | ((and (stringp expansion) | |
804 | (stringp (car children))) | |
805 | (setcar children (concat prev-part expansion (car children)))) | |
806 | ((stringp expansion) | |
807 | (setq children (append (concat prev-part expansion) | |
808 | children))) | |
809 | ((stringp (car children)) | |
810 | (setcar children (concat (car children) prev-part)) | |
811 | (setq children (append expansion children))) | |
812 | (t | |
813 | (setq children (list expansion | |
814 | prev-part | |
815 | children)))) | |
816 | (setq point end-point))) | |
817 | (cond ((stringp children) | |
818 | (concat children (substring string point))) | |
819 | ((stringp (car (last children))) | |
a3110b5d | 820 | (concat (car (last children)) (substring string point))) |
6d12a4df MH |
821 | ((null children) |
822 | string) | |
823 | (t | |
a3110b5d MH |
824 | (concat (mapconcat 'identity |
825 | (nreverse children) | |
826 | "") | |
827 | (substring string point)))))) | |
828 | ||
571855b6 UJ |
829 | (defun xml-substitute-numeric-entities (string) |
830 | "Substitute SGML numeric entities by their respective utf characters. | |
831 | This function replaces numeric entities in the input STRING and | |
832 | returns the modified string. For example \"*\" gets replaced | |
833 | by \"*\"." | |
834 | (if (and string (stringp string)) | |
835 | (let ((start 0)) | |
836 | (while (string-match "&#\\([0-9]+\\);" string start) | |
837 | (condition-case nil | |
838 | (setq string (replace-match | |
839 | (string (read (substring string | |
840 | (match-beginning 1) | |
841 | (match-end 1)))) | |
842 | nil nil string)) | |
843 | (error nil)) | |
844 | (setq start (1+ (match-beginning 0)))) | |
845 | string) | |
846 | nil)) | |
847 | ||
47db06aa GM |
848 | ;;******************************************************************* |
849 | ;;** | |
850 | ;;** Printing a tree. | |
851 | ;;** This function is intended mainly for debugging purposes. | |
852 | ;;** | |
853 | ;;******************************************************************* | |
854 | ||
27240aa4 AS |
855 | (defun xml-debug-print (xml &optional indent-string) |
856 | "Outputs the XML in the current buffer. | |
857 | XML can be a tree or a list of nodes. | |
858 | The first line is indented with the optional INDENT-STRING." | |
859 | (setq indent-string (or indent-string "")) | |
971489ea | 860 | (dolist (node xml) |
27240aa4 AS |
861 | (xml-debug-print-internal node indent-string))) |
862 | ||
863 | (defalias 'xml-print 'xml-debug-print) | |
47db06aa | 864 | |
7731c9f4 | 865 | (defun xml-escape-string (string) |
a1884c78 MH |
866 | "Return the string with entity substitutions made from |
867 | xml-entity-alist." | |
7731c9f4 MH |
868 | (mapconcat (lambda (byte) |
869 | (let ((char (char-to-string byte))) | |
870 | (if (rassoc char xml-entity-alist) | |
871 | (concat "&" (car (rassoc char xml-entity-alist)) ";") | |
872 | char))) | |
76a6127f MH |
873 | ;; This differs from the non-unicode branch. Just |
874 | ;; grabbing the string works here. | |
875 | string "")) | |
7731c9f4 | 876 | |
971489ea | 877 | (defun xml-debug-print-internal (xml indent-string) |
47db06aa | 878 | "Outputs the XML tree in the current buffer. |
a98e819b | 879 | The first line is indented with INDENT-STRING." |
47db06aa GM |
880 | (let ((tree xml) |
881 | attlist) | |
a98e819b | 882 | (insert indent-string ?< (symbol-name (xml-node-name tree))) |
524425ae | 883 | |
47db06aa | 884 | ;; output the attribute list |
971489ea | 885 | (setq attlist (xml-node-attributes tree)) |
47db06aa | 886 | (while attlist |
7731c9f4 MH |
887 | (insert ?\ (symbol-name (caar attlist)) "=\"" |
888 | (xml-escape-string (cdar attlist)) ?\") | |
971489ea | 889 | (setq attlist (cdr attlist))) |
524425ae | 890 | |
971489ea | 891 | (setq tree (xml-node-children tree)) |
47db06aa | 892 | |
27240aa4 AS |
893 | (if (null tree) |
894 | (insert ?/ ?>) | |
895 | (insert ?>) | |
896 | ||
897 | ;; output the children | |
898 | (dolist (node tree) | |
899 | (cond | |
900 | ((listp node) | |
901 | (insert ?\n) | |
902 | (xml-debug-print-internal node (concat indent-string " "))) | |
7731c9f4 MH |
903 | ((stringp node) |
904 | (insert (xml-escape-string node))) | |
27240aa4 AS |
905 | (t |
906 | (error "Invalid XML tree")))) | |
907 | ||
908 | (when (not (and (null (cdr tree)) | |
909 | (stringp (car tree)))) | |
910 | (insert ?\n indent-string)) | |
911 | (insert ?< ?/ (symbol-name (xml-node-name xml)) ?>)))) | |
47db06aa GM |
912 | |
913 | (provide 'xml) | |
914 | ||
915 | ;;; xml.el ends here |