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1cd7adc6 | 1 | ;;; xml.el --- XML parser |
47db06aa | 2 | |
0d30b337 | 3 | ;; Copyright (C) 2000, 2001, 2002, 2003, 2004, |
d7a0267c | 4 | ;; 2005, 2006, 2007 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 | ||
12 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
13 | ;; it under the terms of the GNU General Public License as published by | |
14 | ;; the Free Software Foundation; either version 2, or (at your option) | |
15 | ;; any later version. | |
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 | |
23 | ;; along with GNU Emacs; see the file COPYING. If not, write to the | |
086add15 LK |
24 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
25 | ;; Boston, MA 02110-1301, USA. | |
47db06aa GM |
26 | |
27 | ;;; Commentary: | |
28 | ||
a98e819b DL |
29 | ;; This file contains a somewhat incomplete non-validating XML parser. It |
30 | ;; parses a file, and returns a list that can be used internally by | |
a1dfa9a3 | 31 | ;; any other Lisp libraries. |
47db06aa GM |
32 | |
33 | ;;; FILE FORMAT | |
34 | ||
a98e819b DL |
35 | ;; The document type declaration may either be ignored or (optionally) |
36 | ;; parsed, but currently the parsing will only accept element | |
a1dfa9a3 | 37 | ;; declarations. The XML file is assumed to be well-formed. In case |
a98e819b DL |
38 | ;; of error, the parsing stops and the XML file is shown where the |
39 | ;; parsing stopped. | |
47db06aa | 40 | ;; |
a98e819b | 41 | ;; It also knows how to ignore comments and processing instructions. |
47db06aa GM |
42 | ;; |
43 | ;; The XML file should have the following format: | |
653558a1 GM |
44 | ;; <node1 attr1="name1" attr2="name2" ...>value |
45 | ;; <node2 attr3="name3" attr4="name4">value2</node2> | |
46 | ;; <node3 attr5="name5" attr6="name6">value3</node3> | |
47db06aa | 47 | ;; </node1> |
a1dfa9a3 | 48 | ;; Of course, the name of the nodes and attributes can be anything. There can |
47db06aa GM |
49 | ;; be any number of attributes (or none), as well as any number of children |
50 | ;; below the nodes. | |
51 | ;; | |
52 | ;; There can be only top level node, but with any number of children below. | |
53 | ||
54 | ;;; LIST FORMAT | |
55 | ||
c7f8d055 SM |
56 | ;; The functions `xml-parse-file', `xml-parse-region' and |
57 | ;; `xml-parse-tag' return a list with the following format: | |
47db06aa GM |
58 | ;; |
59 | ;; xml-list ::= (node node ...) | |
c7f8d055 | 60 | ;; node ::= (qname attribute-list . child_node_list) |
47db06aa GM |
61 | ;; child_node_list ::= child_node child_node ... |
62 | ;; child_node ::= node | string | |
c7f8d055 SM |
63 | ;; qname ::= (:namespace-uri . "name") | "name" |
64 | ;; attribute_list ::= ((qname . "value") (qname . "value") ...) | |
47db06aa GM |
65 | ;; | nil |
66 | ;; string ::= "..." | |
67 | ;; | |
a98e819b DL |
68 | ;; Some macros are provided to ease the parsing of this list. |
69 | ;; Whitespace is preserved. Fixme: There should be a tree-walker that | |
70 | ;; can remove it. | |
47db06aa | 71 | |
c7f8d055 SM |
72 | ;; TODO: |
73 | ;; * xml:base, xml:space support | |
74 | ;; * more complete DOCTYPE parsing | |
75 | ;; * pi support | |
76 | ||
47db06aa GM |
77 | ;;; Code: |
78 | ||
a98e819b DL |
79 | ;; Note that {buffer-substring,match-string}-no-properties were |
80 | ;; formerly used in several places, but that removes composition info. | |
81 | ||
47db06aa GM |
82 | ;;******************************************************************* |
83 | ;;** | |
84 | ;;** Macros to parse the list | |
85 | ;;** | |
86 | ;;******************************************************************* | |
87 | ||
f8ab034e MH |
88 | (defconst xml-undefined-entity "?" |
89 | "What to substitute for undefined entities") | |
90 | ||
6d12a4df MH |
91 | (defvar xml-entity-alist |
92 | '(("lt" . "<") | |
93 | ("gt" . ">") | |
94 | ("apos" . "'") | |
95 | ("quot" . "\"") | |
96 | ("amp" . "&")) | |
97 | "The defined entities. Entities are added to this when the DTD is parsed.") | |
98 | ||
99 | (defvar xml-sub-parser nil | |
100 | "Dynamically set this to a non-nil value if you want to parse an XML fragment.") | |
101 | ||
102 | (defvar xml-validating-parser nil | |
103 | "Set to non-nil to get validity checking.") | |
104 | ||
971489ea | 105 | (defsubst xml-node-name (node) |
47db06aa | 106 | "Return the tag associated with NODE. |
a1dfa9a3 SM |
107 | Without namespace-aware parsing, the tag is a symbol. |
108 | ||
109 | With namespace-aware parsing, the tag is a cons of a string | |
110 | representing the uri of the namespace with the local name of the | |
111 | tag. For example, | |
112 | ||
113 | <foo> | |
114 | ||
115 | would be represented by | |
116 | ||
117 | '(\"\" . \"foo\")." | |
118 | ||
971489ea | 119 | (car node)) |
47db06aa | 120 | |
971489ea | 121 | (defsubst xml-node-attributes (node) |
47db06aa GM |
122 | "Return the list of attributes of NODE. |
123 | The list can be nil." | |
971489ea | 124 | (nth 1 node)) |
47db06aa | 125 | |
971489ea | 126 | (defsubst xml-node-children (node) |
47db06aa GM |
127 | "Return the list of children of NODE. |
128 | This is a list of nodes, and it can be nil." | |
971489ea | 129 | (cddr node)) |
47db06aa GM |
130 | |
131 | (defun xml-get-children (node child-name) | |
132 | "Return the children of NODE whose tag is CHILD-NAME. | |
a1dfa9a3 | 133 | CHILD-NAME should match the value returned by `xml-node-name'." |
971489ea SM |
134 | (let ((match ())) |
135 | (dolist (child (xml-node-children node)) | |
a1dfa9a3 SM |
136 | (if (and (listp child) |
137 | (equal (xml-node-name child) child-name)) | |
138 | (push child match))) | |
971489ea | 139 | (nreverse match))) |
47db06aa | 140 | |
9bcd6a7e | 141 | (defun xml-get-attribute-or-nil (node attribute) |
47db06aa | 142 | "Get from NODE the value of ATTRIBUTE. |
a1dfa9a3 | 143 | Return nil if the attribute was not found. |
9bcd6a7e EZ |
144 | |
145 | See also `xml-get-attribute'." | |
2e9bdf15 | 146 | (cdr (assoc attribute (xml-node-attributes node)))) |
9bcd6a7e EZ |
147 | |
148 | (defsubst xml-get-attribute (node attribute) | |
149 | "Get from NODE the value of ATTRIBUTE. | |
150 | An empty string is returned if the attribute was not found. | |
151 | ||
152 | See also `xml-get-attribute-or-nil'." | |
153 | (or (xml-get-attribute-or-nil node attribute) "")) | |
47db06aa GM |
154 | |
155 | ;;******************************************************************* | |
156 | ;;** | |
157 | ;;** Creating the list | |
158 | ;;** | |
159 | ;;******************************************************************* | |
160 | ||
a98e819b | 161 | ;;;###autoload |
2d42509a | 162 | (defun xml-parse-file (file &optional parse-dtd parse-ns) |
a98e819b DL |
163 | "Parse the well-formed XML file FILE. |
164 | If FILE is already visited, use its buffer and don't kill it. | |
47db06aa | 165 | Returns the top node with all its children. |
2d42509a JB |
166 | If PARSE-DTD is non-nil, the DTD is parsed rather than skipped. |
167 | If PARSE-NS is non-nil, then QNAMES are expanded." | |
882cb60d RS |
168 | (if (get-file-buffer file) |
169 | (with-current-buffer (get-file-buffer file) | |
170 | (save-excursion | |
171 | (xml-parse-region (point-min) | |
172 | (point-max) | |
173 | (current-buffer) | |
174 | parse-dtd parse-ns))) | |
175 | (with-temp-buffer | |
176 | (insert-file-contents file) | |
177 | (xml-parse-region (point-min) | |
178 | (point-max) | |
179 | (current-buffer) | |
180 | parse-dtd parse-ns)))) | |
47db06aa | 181 | |
6d12a4df | 182 | |
5ed32352 RS |
183 | (defvar xml-name-re) |
184 | (defvar xml-entity-value-re) | |
0bf41002 | 185 | (defvar xml-att-def-re) |
63b446bc | 186 | (let* ((start-chars (concat "[:alpha:]:_")) |
6d12a4df | 187 | (name-chars (concat "-[:digit:]." start-chars)) |
5178753d | 188 | ;;[3] S ::= (#x20 | #x9 | #xD | #xA)+ |
6d12a4df | 189 | (whitespace "[ \t\n\r]")) |
5178753d MH |
190 | ;;[4] NameStartChar ::= ":" | [A-Z] | "_" | [a-z] | [#xC0-#xD6] |
191 | ;; | [#xD8-#xF6] | [#xF8-#x2FF] | [#x370-#x37D] | [#x37F-#x1FFF] | |
192 | ;; | [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | |
193 | ;; | [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF] | |
6d12a4df | 194 | (defvar xml-name-start-char-re (concat "[" start-chars "]")) |
5178753d | 195 | ;;[4a] NameChar ::= NameStartChar | "-" | "." | [0-9] | #xB7 | [#x0300-#x036F] | [#x203F-#x2040] |
6d12a4df | 196 | (defvar xml-name-char-re (concat "[" name-chars "]")) |
5178753d | 197 | ;;[5] Name ::= NameStartChar (NameChar)* |
6d12a4df | 198 | (defvar xml-name-re (concat xml-name-start-char-re xml-name-char-re "*")) |
5178753d | 199 | ;;[6] Names ::= Name (#x20 Name)* |
6d12a4df | 200 | (defvar xml-names-re (concat xml-name-re "\\(?: " xml-name-re "\\)*")) |
5178753d | 201 | ;;[7] Nmtoken ::= (NameChar)+ |
6d12a4df | 202 | (defvar xml-nmtoken-re (concat xml-name-char-re "+")) |
5178753d | 203 | ;;[8] Nmtokens ::= Nmtoken (#x20 Nmtoken)* |
6d12a4df | 204 | (defvar xml-nmtokens-re (concat xml-nmtoken-re "\\(?: " xml-name-re "\\)*")) |
5178753d | 205 | ;;[66] CharRef ::= '&#' [0-9]+ ';' | '&#x' [0-9a-fA-F]+ ';' |
6d12a4df | 206 | (defvar xml-char-ref-re "\\(?:&#[0-9]+;\\|&#x[0-9a-fA-F]+;\\)") |
5178753d | 207 | ;;[68] EntityRef ::= '&' Name ';' |
6d12a4df | 208 | (defvar xml-entity-ref (concat "&" xml-name-re ";")) |
5178753d | 209 | ;;[69] PEReference ::= '%' Name ';' |
6d12a4df | 210 | (defvar xml-pe-reference-re (concat "%" xml-name-re ";")) |
5178753d | 211 | ;;[67] Reference ::= EntityRef | CharRef |
6d12a4df | 212 | (defvar xml-reference-re (concat "\\(?:" xml-entity-ref "\\|" xml-char-ref-re "\\)")) |
5178753d | 213 | ;;[10] AttValue ::= '"' ([^<&"] | Reference)* '"' | "'" ([^<&'] | Reference)* "'" |
23d519e4 MH |
214 | (defvar xml-att-value-re (concat "\\(?:\"\\(?:[^&\"]\\|" xml-reference-re "\\)*\"\\|" |
215 | "'\\(?:[^&']\\|" xml-reference-re "\\)*'\\)")) | |
5178753d MH |
216 | ;;[56] TokenizedType ::= 'ID' [VC: ID] [VC: One ID per Element Type] [VC: ID Attribute Default] |
217 | ;; | 'IDREF' [VC: IDREF] | |
218 | ;; | 'IDREFS' [VC: IDREF] | |
219 | ;; | 'ENTITY' [VC: Entity Name] | |
220 | ;; | 'ENTITIES' [VC: Entity Name] | |
221 | ;; | 'NMTOKEN' [VC: Name Token] | |
222 | ;; | 'NMTOKENS' [VC: Name Token] | |
23d519e4 | 223 | (defvar xml-tokenized-type-re "\\(?:ID\\|IDREF\\|IDREFS\\|ENTITY\\|ENTITIES\\|NMTOKEN\\|NMTOKENS\\)") |
5178753d | 224 | ;;[58] NotationType ::= 'NOTATION' S '(' S? Name (S? '|' S? Name)* S? ')' |
23d519e4 MH |
225 | (defvar xml-notation-type-re (concat "\\(?:NOTATION" whitespace "(" whitespace "*" xml-name-re |
226 | "\\(?:" whitespace "*|" whitespace "*" xml-name-re "\\)*" whitespace "*)\\)")) | |
5178753d | 227 | ;;[59] Enumeration ::= '(' S? Nmtoken (S? '|' S? Nmtoken)* S? ')' [VC: Enumeration] [VC: No Duplicate Tokens] |
23d519e4 MH |
228 | (defvar xml-enumeration-re (concat "\\(?:(" whitespace "*" xml-nmtoken-re |
229 | "\\(?:" whitespace "*|" whitespace "*" xml-nmtoken-re "\\)*" | |
230 | whitespace ")\\)")) | |
5178753d | 231 | ;;[57] EnumeratedType ::= NotationType | Enumeration |
23d519e4 | 232 | (defvar xml-enumerated-type-re (concat "\\(?:" xml-notation-type-re "\\|" xml-enumeration-re "\\)")) |
5178753d MH |
233 | ;;[54] AttType ::= StringType | TokenizedType | EnumeratedType |
234 | ;;[55] StringType ::= 'CDATA' | |
23d519e4 | 235 | (defvar xml-att-type-re (concat "\\(?:CDATA\\|" xml-tokenized-type-re "\\|" xml-notation-type-re"\\|" xml-enumerated-type-re "\\)")) |
5178753d | 236 | ;;[60] DefaultDecl ::= '#REQUIRED' | '#IMPLIED' | (('#FIXED' S)? AttValue) |
23d519e4 | 237 | (defvar xml-default-decl-re (concat "\\(?:#REQUIRED\\|#IMPLIED\\|\\(?:#FIXED" whitespace "\\)*" xml-att-value-re "\\)")) |
5178753d | 238 | ;;[53] AttDef ::= S Name S AttType S DefaultDecl |
23d519e4 MH |
239 | (defvar xml-att-def-re (concat "\\(?:" whitespace "*" xml-name-re |
240 | whitespace "*" xml-att-type-re | |
241 | whitespace "*" xml-default-decl-re "\\)")) | |
5178753d MH |
242 | ;;[9] EntityValue ::= '"' ([^%&"] | PEReference | Reference)* '"' |
243 | ;; | "'" ([^%&'] | PEReference | Reference)* "'" | |
6d12a4df MH |
244 | (defvar xml-entity-value-re (concat "\\(?:\"\\(?:[^%&\"]\\|" xml-pe-reference-re |
245 | "\\|" xml-reference-re "\\)*\"\\|'\\(?:[^%&']\\|" | |
246 | xml-pe-reference-re "\\|" xml-reference-re "\\)*'\\)"))) | |
247 | ;;[75] ExternalID ::= 'SYSTEM' S SystemLiteral | |
248 | ;; | 'PUBLIC' S PubidLiteral S SystemLiteral | |
249 | ;;[76] NDataDecl ::= S 'NDATA' S | |
250 | ;;[73] EntityDef ::= EntityValue| (ExternalID NDataDecl?) | |
251 | ;;[71] GEDecl ::= '<!ENTITY' S Name S EntityDef S? '>' | |
252 | ;;[74] PEDef ::= EntityValue | ExternalID | |
253 | ;;[72] PEDecl ::= '<!ENTITY' S '%' S Name S PEDef S? '>' | |
254 | ;;[70] EntityDecl ::= GEDecl | PEDecl | |
255 | ||
a98e819b DL |
256 | ;; Note that this is setup so that we can do whitespace-skipping with |
257 | ;; `(skip-syntax-forward " ")', inter alia. Previously this was slow | |
258 | ;; compared with `re-search-forward', but that has been fixed. Also | |
259 | ;; note that the standard syntax table contains other characters with | |
260 | ;; whitespace syntax, like NBSP, but they are invalid in contexts in | |
261 | ;; which we might skip whitespace -- specifically, they're not | |
262 | ;; NameChars [XML 4]. | |
263 | ||
264 | (defvar xml-syntax-table | |
265 | (let ((table (make-syntax-table))) | |
266 | ;; Get space syntax correct per XML [3]. | |
267 | (dotimes (c 31) | |
268 | (modify-syntax-entry c "." table)) ; all are space in standard table | |
5178753d | 269 | (dolist (c '(?\t ?\n ?\r)) ; these should be space |
a98e819b DL |
270 | (modify-syntax-entry c " " table)) |
271 | ;; For skipping attributes. | |
272 | (modify-syntax-entry ?\" "\"" table) | |
273 | (modify-syntax-entry ?' "\"" table) | |
274 | ;; Non-alnum name chars should be symbol constituents (`-' and `_' | |
275 | ;; are OK by default). | |
276 | (modify-syntax-entry ?. "_" table) | |
277 | (modify-syntax-entry ?: "_" table) | |
278 | ;; XML [89] | |
aaaa8abb MH |
279 | (unless (featurep 'xemacs) |
280 | (dolist (c '(#x00B7 #x02D0 #x02D1 #x0387 #x0640 #x0E46 #x0EC6 #x3005 | |
281 | #x3031 #x3032 #x3033 #x3034 #x3035 #x309D #x309E #x30FC | |
282 | #x30FD #x30FE)) | |
283 | (modify-syntax-entry (decode-char 'ucs c) "w" table))) | |
a98e819b DL |
284 | ;; Fixme: rest of [4] |
285 | table) | |
286 | "Syntax table used by `xml-parse-region'.") | |
287 | ||
288 | ;; XML [5] | |
289 | ;; Note that [:alpha:] matches all multibyte chars with word syntax. | |
ab161457 JPW |
290 | (eval-and-compile |
291 | (defconst xml-name-regexp "[[:alpha:]_:][[:alnum:]._:-]*")) | |
a98e819b DL |
292 | |
293 | ;; Fixme: This needs re-writing to deal with the XML grammar properly, i.e. | |
294 | ;; document ::= prolog element Misc* | |
295 | ;; prolog ::= XMLDecl? Misc* (doctypedecl Misc*)? | |
296 | ||
297 | ;;;###autoload | |
2d42509a | 298 | (defun xml-parse-region (beg end &optional buffer parse-dtd parse-ns) |
47db06aa GM |
299 | "Parse the region from BEG to END in BUFFER. |
300 | If BUFFER is nil, it defaults to the current buffer. | |
301 | Returns the XML list for the region, or raises an error if the region | |
2d42509a | 302 | is not well-formed XML. |
47db06aa | 303 | If PARSE-DTD is non-nil, the DTD is parsed rather than skipped, |
2d42509a JB |
304 | and returned as the first element of the list. |
305 | If PARSE-NS is non-nil, then QNAMES are expanded." | |
39d58fc0 MH |
306 | ;; Use fixed syntax table to ensure regexp char classes and syntax |
307 | ;; specs DTRT. | |
308 | (with-syntax-table (standard-syntax-table) | |
309 | (let ((case-fold-search nil) ; XML is case-sensitive. | |
310 | xml result dtd) | |
311 | (save-excursion | |
312 | (if buffer | |
313 | (set-buffer buffer)) | |
314 | (save-restriction | |
315 | (narrow-to-region beg end) | |
a98e819b DL |
316 | (goto-char (point-min)) |
317 | (while (not (eobp)) | |
318 | (if (search-forward "<" nil t) | |
319 | (progn | |
320 | (forward-char -1) | |
34638996 | 321 | (setq result (xml-parse-tag parse-dtd parse-ns)) |
6d12a4df | 322 | (if (and xml result (not xml-sub-parser)) |
a98e819b | 323 | ;; translation of rule [1] of XML specifications |
6d12a4df | 324 | (error "XML: (Not Well-Formed) Only one root tag allowed") |
47db06aa | 325 | (cond |
971489ea | 326 | ((null result)) |
34638996 EZ |
327 | ((and (listp (car result)) |
328 | parse-dtd) | |
971489ea | 329 | (setq dtd (car result)) |
a98e819b DL |
330 | (if (cdr result) ; possible leading comment |
331 | (add-to-list 'xml (cdr result)))) | |
47db06aa | 332 | (t |
a98e819b DL |
333 | (add-to-list 'xml result))))) |
334 | (goto-char (point-max)))) | |
335 | (if parse-dtd | |
336 | (cons dtd (nreverse xml)) | |
337 | (nreverse xml))))))) | |
47db06aa | 338 | |
c7f8d055 | 339 | (defun xml-maybe-do-ns (name default xml-ns) |
a1dfa9a3 SM |
340 | "Perform any namespace expansion. |
341 | NAME is the name to perform the expansion on. | |
c7f8d055 SM |
342 | DEFAULT is the default namespace. XML-NS is a cons of namespace |
343 | names to uris. When namespace-aware parsing is off, then XML-NS | |
344 | is nil. | |
345 | ||
346 | During namespace-aware parsing, any name without a namespace is | |
347 | put into the namespace identified by DEFAULT. nil is used to | |
348 | specify that the name shouldn't be given a namespace." | |
349 | (if (consp xml-ns) | |
350 | (let* ((nsp (string-match ":" name)) | |
351 | (lname (if nsp (substring name (match-end 0)) name)) | |
352 | (prefix (if nsp (substring name 0 (match-beginning 0)) default)) | |
353 | (special (and (string-equal lname "xmlns") (not prefix))) | |
354 | ;; Setting default to nil will insure that there is not | |
355 | ;; matching cons in xml-ns. In which case we | |
356 | (ns (or (cdr (assoc (if special "xmlns" prefix) | |
357 | xml-ns)) | |
6d12a4df | 358 | ""))) |
c7f8d055 SM |
359 | (cons ns (if special "" lname))) |
360 | (intern name))) | |
47db06aa | 361 | |
6d12a4df MH |
362 | (defun xml-parse-fragment (&optional parse-dtd parse-ns) |
363 | "Parse xml-like fragments." | |
364 | (let ((xml-sub-parser t) | |
365 | children) | |
366 | (while (not (eobp)) | |
367 | (let ((bit (xml-parse-tag | |
368 | parse-dtd parse-ns))) | |
369 | (if children | |
370 | (setq children (append (list bit) children)) | |
371 | (if (stringp bit) | |
372 | (setq children (list bit)) | |
373 | (setq children bit))))) | |
374 | (reverse children))) | |
375 | ||
2d42509a | 376 | (defun xml-parse-tag (&optional parse-dtd parse-ns) |
a98e819b | 377 | "Parse the tag at point. |
47db06aa GM |
378 | If PARSE-DTD is non-nil, the DTD of the document, if any, is parsed and |
379 | returned as the first element in the list. | |
2d42509a | 380 | If PARSE-NS is non-nil, then QNAMES are expanded. |
47db06aa | 381 | Returns one of: |
a98e819b DL |
382 | - a list : the matching node |
383 | - nil : the point is not looking at a tag. | |
384 | - a pair : the first element is the DTD, the second is the node." | |
6d12a4df MH |
385 | (let ((xml-validating-parser (or parse-dtd xml-validating-parser)) |
386 | (xml-ns (if (consp parse-ns) | |
2d42509a JB |
387 | parse-ns |
388 | (if parse-ns | |
389 | (list | |
5178753d | 390 | ;; Default for empty prefix is no namespace |
6d12a4df | 391 | (cons "" "") |
c7f8d055 | 392 | ;; "xml" namespace |
6d12a4df | 393 | (cons "xml" "http://www.w3.org/XML/1998/namespace") |
2d42509a | 394 | ;; We need to seed the xmlns namespace |
6d12a4df | 395 | (cons "xmlns" "http://www.w3.org/2000/xmlns/")))))) |
2d42509a JB |
396 | (cond |
397 | ;; Processing instructions (like the <?xml version="1.0"?> tag at the | |
398 | ;; beginning of a document). | |
399 | ((looking-at "<\\?") | |
400 | (search-forward "?>") | |
401 | (skip-syntax-forward " ") | |
402 | (xml-parse-tag parse-dtd xml-ns)) | |
403 | ;; Character data (CDATA) sections, in which no tag should be interpreted | |
404 | ((looking-at "<!\\[CDATA\\[") | |
405 | (let ((pos (match-end 0))) | |
406 | (unless (search-forward "]]>" nil t) | |
6d12a4df | 407 | (error "XML: (Not Well Formed) CDATA section does not end anywhere in the document")) |
ae026110 MH |
408 | (concat |
409 | (buffer-substring pos (match-beginning 0)) | |
410 | (xml-parse-string)))) | |
2d42509a JB |
411 | ;; DTD for the document |
412 | ((looking-at "<!DOCTYPE") | |
6d12a4df MH |
413 | (let ((dtd (xml-parse-dtd parse-ns))) |
414 | (skip-syntax-forward " ") | |
415 | (if xml-validating-parser | |
416 | (cons dtd (xml-parse-tag nil xml-ns)) | |
417 | (xml-parse-tag nil xml-ns)))) | |
2d42509a JB |
418 | ;; skip comments |
419 | ((looking-at "<!--") | |
420 | (search-forward "-->") | |
421 | nil) | |
422 | ;; end tag | |
423 | ((looking-at "</") | |
424 | '()) | |
425 | ;; opening tag | |
426 | ((looking-at "<\\([^/>[:space:]]+\\)") | |
427 | (goto-char (match-end 1)) | |
34638996 EZ |
428 | |
429 | ;; Parse this node | |
2d42509a | 430 | (let* ((node-name (match-string 1)) |
5178753d MH |
431 | ;; Parse the attribute list. |
432 | (attrs (xml-parse-attlist xml-ns)) | |
433 | children pos) | |
c7f8d055 | 434 | |
5178753d MH |
435 | ;; add the xmlns:* attrs to our cache |
436 | (when (consp xml-ns) | |
c7f8d055 SM |
437 | (dolist (attr attrs) |
438 | (when (and (consp (car attr)) | |
6d12a4df MH |
439 | (equal "http://www.w3.org/2000/xmlns/" |
440 | (caar attr))) | |
441 | (push (cons (cdar attr) (cdr attr)) | |
c7f8d055 SM |
442 | xml-ns)))) |
443 | ||
5178753d | 444 | (setq children (list attrs (xml-maybe-do-ns node-name "" xml-ns))) |
c7f8d055 | 445 | |
2d42509a JB |
446 | ;; is this an empty element ? |
447 | (if (looking-at "/>") | |
47db06aa | 448 | (progn |
6d12a4df | 449 | (forward-char 2) |
971489ea | 450 | (nreverse children)) |
6d12a4df MH |
451 | |
452 | ;; is this a valid start tag ? | |
453 | (if (eq (char-after) ?>) | |
454 | (progn | |
455 | (forward-char 1) | |
456 | ;; Now check that we have the right end-tag. Note that this | |
457 | ;; one might contain spaces after the tag name | |
458 | (let ((end (concat "</" node-name "\\s-*>"))) | |
459 | (while (not (looking-at end)) | |
460 | (cond | |
461 | ((looking-at "</") | |
462 | (error "XML: (Not Well-Formed) Invalid end tag (expecting %s) at pos %d" | |
463 | node-name (point))) | |
464 | ((= (char-after) ?<) | |
465 | (let ((tag (xml-parse-tag nil xml-ns))) | |
466 | (when tag | |
467 | (push tag children)))) | |
468 | (t | |
469 | (let ((expansion (xml-parse-string))) | |
470 | (setq children | |
471 | (if (stringp expansion) | |
472 | (if (stringp (car children)) | |
473 | ;; The two strings were separated by a comment. | |
aaaa8abb | 474 | (setq children (append (list (concat (car children) expansion)) |
6d12a4df MH |
475 | (cdr children))) |
476 | (setq children (append (list expansion) children))) | |
477 | (setq children (append expansion children)))))))) | |
478 | ||
479 | (goto-char (match-end 0)) | |
480 | (nreverse children))) | |
481 | ;; This was an invalid start tag (Expected ">", but didn't see it.) | |
482 | (error "XML: (Well-Formed) Couldn't parse tag: %s" | |
483 | (buffer-substring (- (point) 10) (+ (point) 1))))))) | |
484 | (t ;; (Not one of PI, CDATA, Comment, End tag, or Start tag) | |
485 | (unless xml-sub-parser ; Usually, we error out. | |
486 | (error "XML: (Well-Formed) Invalid character")) | |
487 | ||
488 | ;; However, if we're parsing incrementally, then we need to deal | |
489 | ;; with stray CDATA. | |
490 | (xml-parse-string))))) | |
491 | ||
492 | (defun xml-parse-string () | |
493 | "Parse the next whatever. Could be a string, or an element." | |
5178753d MH |
494 | (let* ((pos (point)) |
495 | (string (progn (if (search-forward "<" nil t) | |
496 | (forward-char -1) | |
497 | (goto-char (point-max))) | |
498 | (buffer-substring pos (point))))) | |
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 SM |
518 | (setq end-pos (match-end 0)) |
519 | (setq name (xml-maybe-do-ns (match-string 1) nil xml-ns)) | |
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 | |
a98e819b | 538 | (let ((string (match-string 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 DL |
577 | (looking-at xml-name-regexp) |
578 | (let ((dtd (list (match-string 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")) |
a98e819b | 593 | (let ((pubid (match-string 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")) |
a98e819b DL |
598 | (push (list pubid (match-string 1) 'public) dtd))) |
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")) |
a98e819b DL |
604 | (push (list (match-string 1) 'system) dtd))) |
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 | ||
34638996 | 621 | (setq element (match-string 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]*$" type) ;; children ([47]) | |
632 | (setq type (xml-parse-elem-type (match-string 1 type)))) | |
633 | ((string-match "^%[^;]+;[ \t\n\r]*$" 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]*>")) | |
23d519e4 MH |
662 | (let ((name (match-string 1)) |
663 | (value (substring (match-string 2) 1 | |
664 | (- (length (match-string 2)) 1)))) | |
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]*>"))) | |
23d519e4 MH |
684 | (let ((name (match-string 1)) |
685 | (file (substring (match-string 2) 1 | |
686 | (- (length (match-string 2)) 1)))) | |
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 | |
725 | (setq elem (match-string 1 string) | |
726 | modifier (match-string 2 string)) | |
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 JB |
735 | (if (string-match "[ \t\n\r]*\\([^+*?]+\\)\\([+*?]?\\)" string) |
736 | (setq elem (match-string 1 string) | |
47db06aa GM |
737 | modifier (match-string 2 string)))) |
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 MH |
767 | (setq end-point (match-end 0)) |
768 | (let* ((this-part (match-string 1 string)) | |
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 | |
775 | (string-to-number (match-string 1 this-part))))) | |
776 | (if c (string c)))) | |
777 | ((string-match "#x\\([[:xdigit:]]+\\)" this-part) | |
778 | (let ((c (decode-char | |
779 | 'ucs | |
780 | (string-to-number (match-string 1 this-part) 16)))) | |
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 | ||
47db06aa GM |
826 | ;;******************************************************************* |
827 | ;;** | |
828 | ;;** Printing a tree. | |
829 | ;;** This function is intended mainly for debugging purposes. | |
830 | ;;** | |
831 | ;;******************************************************************* | |
832 | ||
27240aa4 AS |
833 | (defun xml-debug-print (xml &optional indent-string) |
834 | "Outputs the XML in the current buffer. | |
835 | XML can be a tree or a list of nodes. | |
836 | The first line is indented with the optional INDENT-STRING." | |
837 | (setq indent-string (or indent-string "")) | |
971489ea | 838 | (dolist (node xml) |
27240aa4 AS |
839 | (xml-debug-print-internal node indent-string))) |
840 | ||
841 | (defalias 'xml-print 'xml-debug-print) | |
47db06aa | 842 | |
971489ea | 843 | (defun xml-debug-print-internal (xml indent-string) |
47db06aa | 844 | "Outputs the XML tree in the current buffer. |
a98e819b | 845 | The first line is indented with INDENT-STRING." |
47db06aa GM |
846 | (let ((tree xml) |
847 | attlist) | |
a98e819b | 848 | (insert indent-string ?< (symbol-name (xml-node-name tree))) |
524425ae | 849 | |
47db06aa | 850 | ;; output the attribute list |
971489ea | 851 | (setq attlist (xml-node-attributes tree)) |
47db06aa | 852 | (while attlist |
a98e819b | 853 | (insert ?\ (symbol-name (caar attlist)) "=\"" (cdar attlist) ?\") |
971489ea | 854 | (setq attlist (cdr attlist))) |
524425ae | 855 | |
971489ea | 856 | (setq tree (xml-node-children tree)) |
47db06aa | 857 | |
27240aa4 AS |
858 | (if (null tree) |
859 | (insert ?/ ?>) | |
860 | (insert ?>) | |
861 | ||
862 | ;; output the children | |
863 | (dolist (node tree) | |
864 | (cond | |
865 | ((listp node) | |
866 | (insert ?\n) | |
867 | (xml-debug-print-internal node (concat indent-string " "))) | |
868 | ((stringp node) (insert node)) | |
869 | (t | |
870 | (error "Invalid XML tree")))) | |
871 | ||
872 | (when (not (and (null (cdr tree)) | |
873 | (stringp (car tree)))) | |
874 | (insert ?\n indent-string)) | |
875 | (insert ?< ?/ (symbol-name (xml-node-name xml)) ?>)))) | |
47db06aa GM |
876 | |
877 | (provide 'xml) | |
878 | ||
8a02e193 | 879 | ;; arch-tag: 5864b283-5a68-4b59-a20d-36a72b353b9b |
47db06aa | 880 | ;;; xml.el ends here |