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381408e2 LMI |
1 | /* Interface to libxml2. |
2 | Copyright (C) 2010 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software: you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation, either version 3 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <config.h> | |
20 | ||
21 | #ifdef HAVE_LIBXML2 | |
22 | ||
23 | #include <setjmp.h> | |
24 | #include <libxml/tree.h> | |
25 | #include <libxml/parser.h> | |
26 | #include <libxml/HTMLparser.h> | |
27 | ||
28 | #include "lisp.h" | |
29 | #include "buffer.h" | |
30 | ||
31 | Lisp_Object make_dom (xmlNode *node) | |
32 | { | |
4b9832a6 CY |
33 | if (node->type == XML_ELEMENT_NODE) |
34 | { | |
35 | Lisp_Object result = Fcons (intern (node->name), Qnil); | |
36 | xmlNode *child; | |
37 | xmlAttr *property; | |
38 | Lisp_Object plist = Qnil; | |
39 | ||
40 | /* First add the attributes. */ | |
41 | property = node->properties; | |
42 | while (property != NULL) | |
43 | { | |
44 | if (property->children && | |
45 | property->children->content) | |
46 | { | |
47 | plist = Fcons (Fcons (intern (property->name), | |
48 | build_string (property->children->content)), | |
49 | plist); | |
50 | } | |
51 | property = property->next; | |
52 | } | |
53 | result = Fcons (Fnreverse (plist), result); | |
54 | ||
55 | /* Then add the children of the node. */ | |
56 | child = node->children; | |
57 | while (child != NULL) | |
58 | { | |
59 | result = Fcons (make_dom (child), result); | |
60 | child = child->next; | |
61 | } | |
62 | ||
63 | return Fnreverse (result); | |
381408e2 | 64 | } |
4b9832a6 CY |
65 | else if (node->type == XML_TEXT_NODE) |
66 | { | |
67 | if (node->content) | |
68 | return build_string (node->content); | |
69 | else | |
70 | return Qnil; | |
381408e2 | 71 | } |
4b9832a6 | 72 | else |
381408e2 LMI |
73 | return Qnil; |
74 | } | |
75 | ||
76 | static Lisp_Object | |
1b217849 | 77 | parse_region (Lisp_Object start, Lisp_Object end, Lisp_Object base_url, int htmlp) |
381408e2 LMI |
78 | { |
79 | xmlDoc *doc; | |
80 | xmlNode *node; | |
c97c655f | 81 | Lisp_Object result = Qnil; |
55e572ef | 82 | const char *burl = ""; |
1b217849 LMI |
83 | EMACS_INT bytes; |
84 | EMACS_INT istart, iend; | |
8b620f11 | 85 | |
381408e2 | 86 | LIBXML_TEST_VERSION; |
8b620f11 | 87 | |
1b217849 | 88 | validate_region (&start, &end); |
20a5e996 | 89 | |
1b217849 LMI |
90 | istart = XINT (start); |
91 | iend = XINT (end); | |
92 | ||
93 | if (istart < GPT && GPT < iend) | |
94 | move_gap (iend); | |
381408e2 | 95 | |
4b9832a6 CY |
96 | if (! NILP (base_url)) |
97 | { | |
98 | CHECK_STRING (base_url); | |
99 | burl = SDATA (base_url); | |
100 | } | |
8b620f11 | 101 | |
1b217849 | 102 | bytes = CHAR_TO_BYTE (iend) - CHAR_TO_BYTE (istart); |
20a5e996 | 103 | |
1b217849 LMI |
104 | if (htmlp) |
105 | doc = htmlReadMemory (BYTE_POS_ADDR (CHAR_TO_BYTE (istart)), | |
106 | bytes, burl, "utf-8", | |
107 | HTML_PARSE_RECOVER|HTML_PARSE_NONET| | |
108 | HTML_PARSE_NOWARNING|HTML_PARSE_NOERROR); | |
109 | else | |
110 | doc = xmlReadMemory (BYTE_POS_ADDR (CHAR_TO_BYTE (istart)), | |
111 | bytes, burl, "utf-8", | |
112 | XML_PARSE_NONET|XML_PARSE_NOWARNING| | |
113 | XML_PARSE_NOERROR); | |
4b9832a6 CY |
114 | |
115 | if (doc != NULL) | |
116 | { | |
117 | node = xmlDocGetRootElement (doc); | |
118 | if (node != NULL) | |
119 | result = make_dom (node); | |
120 | xmlFreeDoc (doc); | |
121 | xmlCleanupParser (); | |
122 | } | |
8b620f11 | 123 | |
381408e2 LMI |
124 | return result; |
125 | } | |
126 | ||
1b217849 LMI |
127 | DEFUN ("libxml-parse-html-region", Flibxml_parse_html_region, |
128 | Slibxml_parse_html_region, | |
129 | 2, 3, 0, | |
130 | doc: /* Parse the region as an HTML document and return the parse tree. | |
4b9832a6 | 131 | If BASE-URL is non-nil, it is used to expand relative URLs. */) |
1b217849 | 132 | (Lisp_Object start, Lisp_Object end, Lisp_Object base_url) |
381408e2 | 133 | { |
1b217849 | 134 | return parse_region (start, end, base_url, 1); |
381408e2 LMI |
135 | } |
136 | ||
1b217849 LMI |
137 | DEFUN ("libxml-parse-xml-region", Flibxml_parse_xml_region, |
138 | Slibxml_parse_xml_region, | |
139 | 2, 3, 0, | |
140 | doc: /* Parse the region as an XML document and return the parse tree. | |
4b9832a6 | 141 | If BASE-URL is non-nil, it is used to expand relative URLs. */) |
1b217849 | 142 | (Lisp_Object start, Lisp_Object end, Lisp_Object base_url) |
381408e2 | 143 | { |
1b217849 | 144 | return parse_region (start, end, base_url, 0); |
381408e2 LMI |
145 | } |
146 | ||
147 | \f | |
148 | /*********************************************************************** | |
149 | Initialization | |
150 | ***********************************************************************/ | |
151 | void | |
152 | syms_of_xml (void) | |
153 | { | |
1b217849 LMI |
154 | defsubr (&Slibxml_parse_html_region); |
155 | defsubr (&Slibxml_parse_xml_region); | |
381408e2 LMI |
156 | } |
157 | ||
158 | #endif /* HAVE_LIBXML2 */ |