1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183
|
/*
* xlink.c : implementation of the hyperlinks detection module
* This version supports both XML XLinks and HTML simple links
*
* See Copyright for the status of this software.
*
* daniel@veillard.com
*/
#define IN_LIBXML
#include "libxml.h"
#ifdef LIBXML_XPTR_ENABLED
#include <string.h> /* for memset() only */
#ifdef HAVE_CTYPE_H
#include <ctype.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_ZLIB_H
#include <zlib.h>
#endif
#include <libxml/xmlmemory.h>
#include <libxml/tree.h>
#include <libxml/parser.h>
#include <libxml/valid.h>
#include <libxml/xlink.h>
#include <libxml/globals.h>
#define XLINK_NAMESPACE (BAD_CAST "http://www.w3.org/1999/xlink/namespace/")
#define XHTML_NAMESPACE (BAD_CAST "http://www.w3.org/1999/xhtml/")
/****************************************************************
* *
* Default setting and related functions *
* *
****************************************************************/
static xlinkHandlerPtr xlinkDefaultHandler = NULL;
static xlinkNodeDetectFunc xlinkDefaultDetect = NULL;
/**
* xlinkGetDefaultHandler:
*
* Get the default xlink handler.
*
* Returns the current xlinkHandlerPtr value.
*/
xlinkHandlerPtr
xlinkGetDefaultHandler(void) {
return(xlinkDefaultHandler);
}
/**
* xlinkSetDefaultHandler:
* @handler: the new value for the xlink handler block
*
* Set the default xlink handlers
*/
void
xlinkSetDefaultHandler(xlinkHandlerPtr handler) {
xlinkDefaultHandler = handler;
}
/**
* xlinkGetDefaultDetect:
*
* Get the default xlink detection routine
*
* Returns the current function or NULL;
*/
xlinkNodeDetectFunc
xlinkGetDefaultDetect (void) {
return(xlinkDefaultDetect);
}
/**
* xlinkSetDefaultDetect:
* @func: pointer to the new detection routine.
*
* Set the default xlink detection routine
*/
void
xlinkSetDefaultDetect (xlinkNodeDetectFunc func) {
xlinkDefaultDetect = func;
}
/****************************************************************
* *
* The detection routines *
* *
****************************************************************/
/**
* xlinkIsLink:
* @doc: the document containing the node
* @node: the node pointer itself
*
* Check whether the given node carries the attributes needed
* to be a link element (or is one of the linking elements issued
* from the (X)HTML DtDs).
* This routine don't try to do full checking of the link validity
* but tries to detect and return the appropriate link type.
*
* Returns the xlinkType of the node (XLINK_TYPE_NONE if there is no
* link detected.
*/
xlinkType
xlinkIsLink (xmlDocPtr doc, xmlNodePtr node) {
xmlChar *type = NULL, *role = NULL;
xlinkType ret = XLINK_TYPE_NONE;
if (node == NULL) return(XLINK_TYPE_NONE);
if (doc == NULL) doc = node->doc;
if ((doc != NULL) && (doc->type == XML_HTML_DOCUMENT_NODE)) {
/*
* This is an HTML document.
*/
} else if ((node->ns != NULL) &&
(xmlStrEqual(node->ns->href, XHTML_NAMESPACE))) {
/*
* !!!! We really need an IS_XHTML_ELEMENT function from HTMLtree.h @@@
*/
/*
* This is an XHTML element within an XML document
* Check whether it's one of the element able to carry links
* and in that case if it holds the attributes.
*/
}
/*
* We don't prevent a-priori having XML Linking constructs on
* XHTML elements
*/
type = xmlGetNsProp(node, BAD_CAST"type", XLINK_NAMESPACE);
if (type != NULL) {
if (xmlStrEqual(type, BAD_CAST "simple")) {
ret = XLINK_TYPE_SIMPLE;
} else if (xmlStrEqual(type, BAD_CAST "extended")) {
role = xmlGetNsProp(node, BAD_CAST "role", XLINK_NAMESPACE);
if (role != NULL) {
xmlNsPtr xlink;
xlink = xmlSearchNs(doc, node, XLINK_NAMESPACE);
if (xlink == NULL) {
/* Humm, fallback method */
if (xmlStrEqual(role, BAD_CAST"xlink:external-linkset"))
ret = XLINK_TYPE_EXTENDED_SET;
} else {
xmlChar buf[200];
snprintf((char *) buf, sizeof(buf), "%s:external-linkset",
(char *) xlink->prefix);
buf[sizeof(buf) - 1] = 0;
if (xmlStrEqual(role, buf))
ret = XLINK_TYPE_EXTENDED_SET;
}
}
ret = XLINK_TYPE_EXTENDED;
}
}
if (type != NULL) xmlFree(type);
if (role != NULL) xmlFree(role);
return(ret);
}
#endif /* LIBXML_XPTR_ENABLED */
#define bottom_xlink
#include "elfgcchack.h"
|