* 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 xli
| 102 | * link detected. |
| 103 | */ |
| 104 | xlinkType |
| 105 | xlinkIsLink (xmlDocPtr doc, xmlNodePtr node) { |
| 106 | xmlChar *type = NULL, *role = NULL; |
| 107 | xlinkType ret = XLINK_TYPE_NONE; |
| 108 | |
| 109 | if (node == NULL) return(XLINK_TYPE_NONE); |
| 110 | if (doc == NULL) doc = node->doc; |
| 111 | if ((doc != NULL) && (doc->type == XML_HTML_DOCUMENT_NODE)) { |
| 112 | /* |
| 113 | * This is an HTML document. |
| 114 | */ |
| 115 | } else if ((node->ns != NULL) && |
| 116 | (xmlStrEqual(node->ns->href, XHTML_NAMESPACE))) { |
| 117 | /* |
| 118 | * !!!! We really need an IS_XHTML_ELEMENT function from HTMLtree.h @@@ |
| 119 | */ |
| 120 | /* |
| 121 | * This is an XHTML element within an XML document |
| 122 | * Check whether it's one of the element able to carry links |
| 123 | * and in that case if it holds the attributes. |
| 124 | */ |
| 125 | } |
| 126 | |
| 127 | /* |
| 128 | * We don't prevent a-priori having XML Linking constructs on |
| 129 | * XHTML elements |
| 130 | */ |
| 131 | type = xmlGetNsProp(node, BAD_CAST"type", XLINK_NAMESPACE); |
| 132 | if (type != NULL) { |
| 133 | if (xmlStrEqual(type, BAD_CAST "simple")) { |
| 134 | ret = XLINK_TYPE_SIMPLE; |
| 135 | } else if (xmlStrEqual(type, BAD_CAST "extended")) { |
| 136 | role = xmlGetNsProp(node, BAD_CAST "role", XLINK_NAMESPACE); |
| 137 | if (role != NULL) { |
| 138 | xmlNsPtr xlink; |
| 139 | xlink = xmlSearchNs(doc, node, XLINK_NAMESPACE); |
| 140 | if (xlink == NULL) { |
| 141 | /* Humm, fallback method */ |
| 142 | if (xmlStrEqual(role, BAD_CAST"xlink:external-linkset")) |
| 143 | ret = XLINK_TYPE_EXTENDED_SET; |
| 144 | } else { |
| 145 | xmlChar buf[200]; |
| 146 | snprintf((char *) buf, sizeof(buf), "%s:external-linkset", |
| 147 | (char *) xlink->prefix); |
| 148 | buf[sizeof(buf) - 1] = 0; |
| 149 | if (xmlStrEqual(role, buf)) |
| 150 | ret = XLINK_TYPE_EXTENDED_SET; |
| 151 | |
| 152 | } |
| 153 | |
| 154 | } |
| 155 | ret = XLINK_TYPE_EXTENDED; |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | if (type != NULL) xmlFree(type); |
| 160 | if (role != NULL) xmlFree(role); |
| 161 | return(ret); |
nothing calls this directly
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