mirror of
https://github.com/reactos/reactos.git
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183 lines
4.5 KiB
C
183 lines
4.5 KiB
C
/*
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* xlink.c : implementation of the hyperlinks detection module
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* This version supports both XML XLinks and HTML simple links
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*
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* See Copyright for the status of this software.
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*
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* daniel@veillard.com
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*/
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#define IN_LIBXML
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#include "libxml.h"
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#ifdef LIBXML_XPTR_ENABLED
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#include <string.h> /* for memset() only */
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#ifdef HAVE_CTYPE_H
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#include <ctype.h>
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#endif
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_ZLIB_H
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#include <zlib.h>
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#endif
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#include <libxml/xmlmemory.h>
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#include <libxml/tree.h>
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#include <libxml/parser.h>
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#include <libxml/valid.h>
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#include <libxml/xlink.h>
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#include <libxml/globals.h>
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#define XLINK_NAMESPACE (BAD_CAST "http://www.w3.org/1999/xlink/namespace/")
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#define XHTML_NAMESPACE (BAD_CAST "http://www.w3.org/1999/xhtml/")
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/****************************************************************
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* *
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* Default setting and related functions *
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* *
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****************************************************************/
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static xlinkHandlerPtr xlinkDefaultHandler = NULL;
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static xlinkNodeDetectFunc xlinkDefaultDetect = NULL;
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/**
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* xlinkGetDefaultHandler:
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*
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* Get the default xlink handler.
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*
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* Returns the current xlinkHandlerPtr value.
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*/
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xlinkHandlerPtr
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xlinkGetDefaultHandler(void) {
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return(xlinkDefaultHandler);
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}
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/**
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* xlinkSetDefaultHandler:
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* @handler: the new value for the xlink handler block
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*
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* Set the default xlink handlers
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*/
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void
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xlinkSetDefaultHandler(xlinkHandlerPtr handler) {
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xlinkDefaultHandler = handler;
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}
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/**
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* xlinkGetDefaultDetect:
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*
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* Get the default xlink detection routine
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*
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* Returns the current function or NULL;
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*/
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xlinkNodeDetectFunc
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xlinkGetDefaultDetect (void) {
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return(xlinkDefaultDetect);
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}
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/**
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* xlinkSetDefaultDetect:
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* @func: pointer to the new detection routine.
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*
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* Set the default xlink detection routine
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*/
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void
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xlinkSetDefaultDetect (xlinkNodeDetectFunc func) {
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xlinkDefaultDetect = func;
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}
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/****************************************************************
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* *
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* The detection routines *
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* *
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****************************************************************/
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/**
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* xlinkIsLink:
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* @doc: the document containing the node
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* @node: the node pointer itself
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*
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* Check whether the given node carries the attributes needed
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* to be a link element (or is one of the linking elements issued
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* from the (X)HTML DtDs).
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* This routine don't try to do full checking of the link validity
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* but tries to detect and return the appropriate link type.
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*
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* Returns the xlinkType of the node (XLINK_TYPE_NONE if there is no
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* link detected.
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*/
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xlinkType
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xlinkIsLink (xmlDocPtr doc, xmlNodePtr node) {
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xmlChar *type = NULL, *role = NULL;
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xlinkType ret = XLINK_TYPE_NONE;
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if (node == NULL) return(XLINK_TYPE_NONE);
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if (doc == NULL) doc = node->doc;
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if ((doc != NULL) && (doc->type == XML_HTML_DOCUMENT_NODE)) {
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/*
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* This is an HTML document.
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*/
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} else if ((node->ns != NULL) &&
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(xmlStrEqual(node->ns->href, XHTML_NAMESPACE))) {
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/*
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* !!!! We really need an IS_XHTML_ELEMENT function from HTMLtree.h @@@
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*/
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/*
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* This is an XHTML element within an XML document
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* Check whether it's one of the element able to carry links
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* and in that case if it holds the attributes.
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*/
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}
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/*
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* We don't prevent a-priori having XML Linking constructs on
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* XHTML elements
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*/
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type = xmlGetNsProp(node, BAD_CAST"type", XLINK_NAMESPACE);
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if (type != NULL) {
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if (xmlStrEqual(type, BAD_CAST "simple")) {
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ret = XLINK_TYPE_SIMPLE;
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} if (xmlStrEqual(type, BAD_CAST "extended")) {
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role = xmlGetNsProp(node, BAD_CAST "role", XLINK_NAMESPACE);
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if (role != NULL) {
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xmlNsPtr xlink;
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xlink = xmlSearchNs(doc, node, XLINK_NAMESPACE);
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if (xlink == NULL) {
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/* Humm, fallback method */
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if (xmlStrEqual(role, BAD_CAST"xlink:external-linkset"))
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ret = XLINK_TYPE_EXTENDED_SET;
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} else {
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xmlChar buf[200];
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snprintf((char *) buf, sizeof(buf), "%s:external-linkset",
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(char *) xlink->prefix);
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buf[sizeof(buf) - 1] = 0;
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if (xmlStrEqual(role, buf))
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ret = XLINK_TYPE_EXTENDED_SET;
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}
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}
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ret = XLINK_TYPE_EXTENDED;
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}
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}
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if (type != NULL) xmlFree(type);
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if (role != NULL) xmlFree(role);
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return(ret);
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}
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#endif /* LIBXML_XPTR_ENABLED */
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#define bottom_xlink
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#include "elfgcchack.h"
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