Initial checkin for Olivier

content/xslt/src/xslt/txDocumentFunctionCall.cpp

@@ -0,0 +1,161 @@
+/*
+ * The contents of this file are subject to the Mozilla Public
+ * License Version 1.1 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ * implied. See the License for the specific language governing
+ * rights and limitations under the License.
+ *
+ * The Original Code is TransforMiiX XSLT processor.
+ *
+ * The Initial Developer of the Original Code is The MITRE Corporation.
+ * Portions created by MITRE are Copyright (C) 1999 The MITRE Corporation.
+ *
+ * Portions created by Olivier Gerardin are  Copyright (C) 2000,
+ * Olivier Gerardin. All rights reserved.
+ *
+ * Portions created by Keith Visco are  Copyright (C) 2000, Keith Visco.
+ * All rights reserved.
+ *
+ * Contributor(s):
+ * Olivier Gerardin, ogerardin@vo.lu
+ *   -- original author.
+ */
+
+/**
+ * DocumentFunctionCall
+ * A representation of the XSLT additional function: document()
+ */
+
+
+#include "XSLTFunctions.h"
+#include "URIUtils.h"
+#include "XMLParser.h"
+
+/**
+ * Creates a new DocumentFunctionCall.
+**/
+DocumentFunctionCall::DocumentFunctionCall(Document* xslDocument) : FunctionCall(DOCUMENT_FN)
+{
+  this->xslDocument = xslDocument;
+} //-- DocumentFunctionCall
+
+
+/**
+ * Evaluates this Expr based on the given context node and processor state
+ * NOTE: the implementation is incomplete since it does not make use of the
+ * second argument (base URI)
+ * @param context the context node for evaluation of this Expr
+ * @param ps the ContextState containing the stack information needed
+ * for evaluation
+ * @return the result of the evaluation
+**/
+ExprResult* DocumentFunctionCall::evaluate(Node* context, ContextState* cs) {
+    NodeSet* nodeSet = new NodeSet();
+
+    //-- document( object, node-set? )
+    if ( requireParams(1, 2, cs) ) {
+      ListIterator* iter = params.iterator();
+      Expr* param1 = (Expr*) iter->next();
+      ExprResult* exprResult1 = param1->evaluate(context, cs);
+      NodeSet*    nodeSet2 = 0;
+
+      if (iter->hasNext()) {
+	// we have 2 arguments, make sure the second is a NodeSet
+	Expr* param2 = (Expr*) iter->next();
+	ExprResult* exprResult2 = param2->evaluate(context, cs);
+	if ( exprResult2->getResultType() != ExprResult::NODESET ) {
+	  String err("node-set expected as second argument to document()");
+	  cs->recieveError(err);
+	  delete exprResult2;
+	}
+	else {
+	  nodeSet2 = (NodeSet*) exprResult2;
+	}
+      }
+
+      if ( exprResult1->getResultType() == ExprResult::NODESET ) {
+	// The first argument is a NodeSet, iterate on its nodes
+	NodeSet* nodeSet1 = (NodeSet*) exprResult1;
+	for (int i=0; i<nodeSet1->size(); i++) {
+	  Node* node = nodeSet1->get(i);
+	  DOMString uriStr;
+	  XMLDOMUtils::getNodeValue(node, &uriStr);
+	  if (nodeSet2) {
+	    // if the second argument was specified, use it
+	    String baseUriStr;
+	    // TODO: retrieve the base URI of the first node of nodeSet2 in document order
+	    retrieveDocument(uriStr, baseUriStr, *nodeSet, cs);
+	  }
+	  else {
+	    // otherwise, use the base URI of the node itself
+	    String baseUriStr;
+	    // TODO: retrieve the base URI of node
+	    retrieveDocument(uriStr, baseUriStr, *nodeSet, cs);
+	  }
+	}
+      }
+
+      else {
+	// The first argument is not a NodeSet
+	String uriStr;
+	evaluateToString(param1, context, cs, uriStr);
+	String baseUriStr;
+	// TODO: retrieve the base URI of the first node of nodeSet2 in document order
+	retrieveDocument(uriStr, baseUriStr, *nodeSet, cs);
+      }
+      delete exprResult1;
+      delete nodeSet2;
+      delete iter;
+    }
+
+    return nodeSet;
+} //-- evaluate
+
+
+/**
+ * Retrieve the document designated by the URI uri, using baseUri as base URI if
+ * necessary, parses it as an XML document, and append the resulting document node
+ * to resultNodeSet.
+ * NOTES: fragment identifiers in the URI are not supported
+ *
+ * @param uri the URI of the document to retrieve
+ * @param baseUri the base URI used to resolve the URI if uri is relative
+ * @param resultNodeSet the NodeSet to append the document to
+ * @param cs the ContextState, used for reporting errors
+ */
+void DocumentFunctionCall::retrieveDocument(String& uri, String& baseUri, NodeSet& resultNodeSet, ContextState* cs)
+{
+  if (uri.length() == 0) {
+    // if uri is the empty String, the document is the stylesheet itself
+    resultNodeSet.add(xslDocument);
+    return;
+  }
+
+  // open URI
+  istream* xmlInput = URIUtils::getInputStream(uri, baseUri, "error");
+  if (!xmlInput) {
+    String err("in document() function: failed to open URI: ");
+    err.append(uri);
+    cs->recieveError(err);
+    return;
+  }
+
+  // parse document
+  XMLParser xmlParser;
+  Document* xmlDoc = xmlParser.parse(*xmlInput);
+  if (!xmlDoc) {
+    String err("in document() function: ");
+    err.append(xmlParser.getErrorString());
+    cs->recieveError(err);
+    return;
+  }
+
+  // append the to resultNodeSet
+  resultNodeSet.add(xmlDoc);
+}
+
+