зеркало из https://github.com/mozilla/gecko-dev.git
140 строки
4.1 KiB
C++
140 строки
4.1 KiB
C++
/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is TransforMiiX XSLT processor.
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*
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* The Initial Developer of the Original Code is The MITRE Corporation.
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* Portions created by MITRE are Copyright (C) 1999 The MITRE Corporation.
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*
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* Portions created by Keith Visco as a Non MITRE employee,
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* (C) 1999 Keith Visco. All Rights Reserved.
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*
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* Contributor(s):
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* Keith Visco, kvisco@ziplink.net
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* -- original author.
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*
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* $Id: BasicNodeExpr.cpp,v 1.1 2000/04/06 07:44:45 kvisco%ziplink.net Exp $
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*/
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#include "Expr.h"
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/**
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* @author <a href="mailto:kvisco@ziplink.net">Keith Visco</a>
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* @version $Revision: 1.1 $ $Date: 2000/04/06 07:44:45 $
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**/
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//- Constructors -/
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/**
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* Creates a new BasicNodeExpr, which matchs any Node
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**/
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BasicNodeExpr::BasicNodeExpr() {
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this->type = NodeExpr::NODE_EXPR;
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} //-- BasicNodeExpr
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/**
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* Creates a new BasicNodeExpr of the given type
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**/
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BasicNodeExpr::BasicNodeExpr(NodeExpr::NodeExprType nodeExprType) {
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this->type = nodeExprType;
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} //-- BasicNodeExpr
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/**
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* Destroys this NodeExpr
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**/
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BasicNodeExpr::~BasicNodeExpr() {};
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//------------------/
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//- Public Methods -/
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//------------------/
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/**
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* Evaluates this Expr based on the given context node and processor state
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* @param context the context node for evaluation of this Expr
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* @param ps the ContextState containing the stack information needed
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* for evaluation
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* @return the result of the evaluation
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**/
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ExprResult* BasicNodeExpr::evaluate(Node* context, ContextState* cs) {
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NodeSet* nodeSet = new NodeSet();
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if ( !context ) return nodeSet;
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NodeList* nl = context->getChildNodes();
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for (int i = 0; i < nl->getLength(); i++ ) {
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Node* node = nl->item(i);
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if (matches(node, context, cs)) nodeSet->add(node);
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}
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return nodeSet;
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} //-- evaluate
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//-----------------------------/
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//- Methods from NodeExpr.cpp -/
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//-----------------------------/
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/**
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* Returns the default priority of this Pattern based on the given Node,
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* context Node, and ContextState.
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* If this pattern does not match the given Node under the current context Node and
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* ContextState then Negative Infinity is returned.
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**/
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double BasicNodeExpr::getDefaultPriority(Node* node, Node* context, ContextState* cs) {
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return -0.5;
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} //-- getDefaultPriority
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/**
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* Returns the type of this NodeExpr
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* @return the type of this NodeExpr
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**/
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short BasicNodeExpr::getType() {
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return type;
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} //-- getType
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/**
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* Determines whether this NodeExpr matches the given node within
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* the given context
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**/
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MBool BasicNodeExpr::matches(Node* node, Node* context, ContextState* cs) {
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if ( !node ) return MB_FALSE;
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switch ( type ) {
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case NodeExpr::COMMENT_EXPR:
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return (MBool) (node->getNodeType() == Node::COMMENT_NODE);
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case NodeExpr::PI_EXPR :
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return (MBool) (node->getNodeType() == Node::PROCESSING_INSTRUCTION_NODE);
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default: //-- node()
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break;
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}
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return MB_TRUE;
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} //-- matches
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/**
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* Returns the String representation of this NodeExpr.
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* @param dest the String to use when creating the String
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* representation. The String representation will be appended to
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* any data in the destination String, to allow cascading calls to
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* other #toString() methods for Expressions.
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* @return the String representation of this NodeExpr.
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**/
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void BasicNodeExpr::toString(String& dest) {
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switch ( type ) {
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case NodeExpr::COMMENT_EXPR:
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dest.append("comment()");
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break;
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case NodeExpr::PI_EXPR :
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dest.append("processing-instruction()");
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break;
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default: //-- node()
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dest.append("node()");
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break;
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}
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} //-- toString
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