third_party/WebKit/Source/core/xml/XSLTExtensions.cpp

   1 /**
   2  * Copyright (C) 2001-2002 Thomas Broyer, Charlie Bozeman and Daniel Veillard.
   3  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a copy
   6  * of this software and associated documentation files (the "Software"), to deal
   7  * in the Software without restriction, including without limitation the rights
   8  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   9  * copies of the Software, and to permit persons to whom the Software is fur-
  10  * nished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FIT-
  17  * NESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  18  * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
  19  * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CON-
  20  * NECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Except as contained in this notice, the name of the authors shall not
  23  * be used in advertising or otherwise to promote the sale, use or other deal-
  24  * ings in this Software without prior written authorization from him.
  25  */
  26
  27 #include "config.h"
  28 #include "core/xml/XSLTExtensions.h"
  29
  30 #include "platform/RuntimeEnabledFeatures.h"
  31 #include "wtf/Assertions.h"
  32 #include <libxml/xpathInternals.h>
  33 #include <libxslt/extensions.h>
  34 #include <libxslt/extra.h>
  35 #include <libxslt/xsltutils.h>
  36
  37 namespace blink {
  38
  39 // FIXME: This code is taken from libexslt 1.1.11; should sync with newer
  40 // versions.
  41 static void exsltNodeSetFunction(xmlXPathParserContextPtr ctxt, int nargs)
  42 {
  43     xmlChar* strval;
  44     xmlNodePtr retNode;
  45     xmlXPathObjectPtr ret;
  46
  47     if (nargs != 1) {
  48         xmlXPathSetArityError(ctxt);
  49         return;
  50     }
  51
  52     if (xmlXPathStackIsNodeSet(ctxt)) {
  53         xsltFunctionNodeSet(ctxt, nargs);
  54         return;
  55     }
  56
  57     strval = xmlXPathPopString(ctxt);
  58     retNode = xmlNewDocText(0, strval);
  59     ret = xmlXPathNewValueTree(retNode);
  60
  61     // FIXME: It might be helpful to push any errors from xmlXPathNewValueTree
  62     // up to the Javascript Console.
  63     if (ret)
  64         ret->type = XPATH_NODESET;
  65
  66     if (strval)
  67         xmlFree(strval);
  68
  69     valuePush(ctxt, ret);
  70 }
  71
  72 void registerXSLTExtensions(xsltTransformContextPtr ctxt)
  73 {
  74     ASSERT(RuntimeEnabledFeatures::xsltEnabled());
  75     xsltRegisterExtFunction(ctxt, (const xmlChar*)"node-set", (const xmlChar*)"http://exslt.org/common", exsltNodeSetFunction);
  76 }
  77
  78 } // namespace blink