Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)

1 files changed, 129 insertions, 0 deletions

diff --git a/Source/WebCore/xml/XPathParser.h b/Source/WebCore/xml/XPathParser.h
new file mode 100644
index 000000000..e58c444e1
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+++ b/Source/WebCore/xml/XPathParser.h
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+/*
+ * Copyright 2005 Maksim Orlovich <maksim@kde.org>
+ * Copyright (C) 2006 Apple Computer, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef XPathParser_h
+#define XPathParser_h
+
+#include "XPathStep.h"
+#include "XPathPredicate.h"
+
+namespace WebCore {
+
+    typedef int ExceptionCode;
+
+    class XPathNSResolver;
+
+    namespace XPath {
+
+        class Expression;
+        class ParseNode;
+        class Predicate;
+
+        struct Token {
+            int type;
+            String str;
+            Step::Axis axis;
+            NumericOp::Opcode numop;
+            EqTestOp::Opcode eqop;
+            
+            Token(int t) : type(t) {}
+            Token(int t, const String& v): type(t), str(v) {}
+            Token(int t, Step::Axis v): type(t), axis(v) {}
+            Token(int t, NumericOp::Opcode v): type(t), numop(v) {}
+            Token(int t, EqTestOp::Opcode v): type(t), eqop(v) {}
+        };
+
+        class Parser {
+            WTF_MAKE_NONCOPYABLE(Parser);
+        public:
+            Parser();
+            ~Parser();
+
+            XPathNSResolver* resolver() const { return m_resolver.get(); }
+            bool expandQName(const String& qName, String& localName, String& namespaceURI);
+
+            Expression* parseStatement(const String& statement, PassRefPtr<XPathNSResolver>, ExceptionCode&);
+
+            static Parser* current() { return currentParser; }
+
+            int lex(void* yylval);
+
+            Expression* m_topExpr;
+            bool m_gotNamespaceError;
+
+            void registerParseNode(ParseNode*);
+            void unregisterParseNode(ParseNode*);
+
+            void registerPredicateVector(Vector<Predicate*>*);
+            void deletePredicateVector(Vector<Predicate*>*);
+
+            void registerExpressionVector(Vector<Expression*>*);
+            void deleteExpressionVector(Vector<Expression*>*);
+
+            void registerString(String*);
+            void deleteString(String*);
+
+            void registerNodeTest(Step::NodeTest*);
+            void deleteNodeTest(Step::NodeTest*);
+
+        private:
+            bool isBinaryOperatorContext() const;
+
+            void skipWS();
+            Token makeTokenAndAdvance(int type, int advance = 1);
+            Token makeTokenAndAdvance(int type, NumericOp::Opcode, int advance = 1);
+            Token makeTokenAndAdvance(int type, EqTestOp::Opcode, int advance = 1);
+            char peekAheadHelper();
+            char peekCurHelper();
+
+            Token lexString();
+            Token lexNumber();
+            bool lexNCName(String&);
+            bool lexQName(String&);
+
+            Token nextToken();
+            Token nextTokenInternal();
+
+            void reset(const String& data);
+
+            static Parser* currentParser;
+
+            unsigned m_nextPos;
+            String m_data;
+            int m_lastTokenType;
+            RefPtr<XPathNSResolver> m_resolver;
+
+            HashSet<ParseNode*> m_parseNodes;
+            HashSet<Vector<Predicate*>*> m_predicateVectors;
+            HashSet<Vector<Expression*>*> m_expressionVectors;
+            HashSet<String*> m_strings;
+            HashSet<Step::NodeTest*> m_nodeTests;
+        };
+
+    }
+}
+
+#endif