| /* |
| * 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 |
| #ifdef HAVE_STRING_H |
| #include <string.h> /* for memset() only */ |
| #endif |
| #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]; |
| XML_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" |