1 files changed, 109 insertions, 0 deletions
diff --git a/dom/xslt/xpath/txExprParser.h b/dom/xslt/xpath/txExprParser.h
new file mode 100644
index 000000000..238e03399
--- /dev/null
+++ b/dom/xslt/xpath/txExprParser.h
@@ -0,0 +1,109 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * ExprParser
+ * This class is used to parse XSL Expressions
+ * @see ExprLexer
+**/
+
+#ifndef MITREXSL_EXPRPARSER_H
+#define MITREXSL_EXPRPARSER_H
+
+#include "txCore.h"
+#include "nsAutoPtr.h"
+#include "nsString.h"
+
+class Expr;
+class txExprLexer;
+class FunctionCall;
+class LocationStep;
+class nsIAtom;
+class PredicateList;
+class Token;
+class txIParseContext;
+class txNodeTest;
+
+class txExprParser
+{
+public:
+
+    static nsresult createExpr(const nsSubstring& aExpression,
+                               txIParseContext* aContext, Expr** aExpr)
+    {
+        return createExprInternal(aExpression, 0, aContext, aExpr);
+    }
+
+    /**
+     * Creates an Attribute Value Template using the given value
+     */
+    static nsresult createAVT(const nsSubstring& aAttrValue,
+                              txIParseContext* aContext,
+                              Expr** aResult);
+
+
+protected:
+    static nsresult createExprInternal(const nsSubstring& aExpression,
+                                       uint32_t aSubStringPos,
+                                       txIParseContext* aContext,
+                                       Expr** aExpr);
+    /**
+     * Using nsAutoPtr& to optimize passing the ownership to the
+     * created binary expression objects.
+     */
+    static nsresult createBinaryExpr(nsAutoPtr<Expr>& left,
+                                     nsAutoPtr<Expr>& right, Token* op,
+                                     Expr** aResult);
+    static nsresult createExpr(txExprLexer& lexer, txIParseContext* aContext,
+                               Expr** aResult);
+    static nsresult createFilterOrStep(txExprLexer& lexer,
+                                       txIParseContext* aContext,
+                                       Expr** aResult);
+    static nsresult createFunctionCall(txExprLexer& lexer,
+                                       txIParseContext* aContext,
+                                       Expr** aResult);
+    static nsresult createLocationStep(txExprLexer& lexer,
+                                       txIParseContext* aContext,
+                                       Expr** aResult);
+    static nsresult createNodeTypeTest(txExprLexer& lexer,
+                                       txNodeTest** aResult);
+    static nsresult createPathExpr(txExprLexer& lexer,
+                                   txIParseContext* aContext,
+                                   Expr** aResult);
+    static nsresult createUnionExpr(txExprLexer& lexer,
+                                    txIParseContext* aContext,
+                                    Expr** aResult);
+                  
+    static bool isLocationStepToken(Token* aToken);
+                  
+    static short precedence(Token* aToken);
+
+    /**
+     * Resolve a QName, given the mContext parse context.
+     * Returns prefix and localName as well as namespace ID
+     */
+    static nsresult resolveQName(const nsAString& aQName, nsIAtom** aPrefix,
+                                 txIParseContext* aContext,
+                                 nsIAtom** aLocalName, int32_t& aNamespace,
+                                 bool aIsNameTest = false);
+
+    /**
+     * Using the given lexer, parses the tokens if they represent a
+     * predicate list
+     * If an error occurs a non-zero String pointer will be returned
+     * containing the error message.
+     * @param predicateList, the PredicateList to add predicate expressions to
+     * @param lexer the ExprLexer to use for parsing tokens
+     * @return 0 if successful, or a String pointer to the error message
+     */
+    static nsresult parsePredicates(PredicateList* aPredicateList,
+                                    txExprLexer& lexer,
+                                    txIParseContext* aContext);
+    static nsresult parseParameters(FunctionCall* aFnCall, txExprLexer& lexer,
+                                    txIParseContext* aContext);
+
+};
+
+#endif