mirror of
https://github.com/jezhiggins/arabica
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289 lines
9.9 KiB
C++
289 lines
9.9 KiB
C++
#ifndef ARABICA_XSLT_COMPILATION_CONTEXT
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#define ARABICA_XSLT_COMPILATION_CONTEXT
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#include <SAX/XMLReader.hpp>
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#include <SAX/helpers/DefaultHandler.hpp>
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#include <XML/strings.hpp>
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#include <XPath/XPath.hpp>
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#include <stack>
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#include "xslt_stylesheet_parser.hpp"
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#include "xslt_functions.hpp"
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namespace Arabica
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{
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namespace XSLT
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{
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template<class string_type, class string_adaptor> class CompiledStylesheet;
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template<class string_type, class string_adaptor> class ItemContainer;
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template<class string_type, class string_adaptor = Arabica::default_string_adaptor<string_type> >
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class CompilationContext :
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private Arabica::XPath::FunctionResolver<string_type, string_adaptor>,
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private Arabica::XPath::NamespaceContext<string_type, string_adaptor>,
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private Arabica::XPath::DefaultVariableCompileTimeResolver<string_type, string_adaptor>
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{
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private:
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typedef Arabica::XPath::DefaultVariableCompileTimeResolver<string_type, string_adaptor> CTVariableResolverT;
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public:
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typedef StylesheetParser<string_type, string_adaptor> StylesheetParserT;
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typedef CompiledStylesheet<string_type, string_adaptor> CompiledStylesheetT;
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typedef SAX::DefaultHandler<string_type, string_adaptor> DefaultHandlerT;
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typedef SAX::ContentHandler<string_type, string_adaptor> ContentHandlerT;
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typedef SAX::Attributes<string_type, string_adaptor> AttributesT;
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typedef Arabica::XPath::XPathExpressionPtr<string_type, string_adaptor> XPathExpressionPtrT;
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typedef Arabica::XPath::MatchExpr<string_type, string_adaptor> MatchExprT;
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typedef XML::QualifiedName<string_type, string_adaptor> QualifiedNameT;
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CompilationContext(StylesheetParserT& parser,
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CompiledStylesheetT& stylesheet) :
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parser_(parser),
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stylesheet_(stylesheet),
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autoNs_(1),
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current_allowed_(false),
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variables_allowed_(true),
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precedence_(Precedence::InitialPrecedence())
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{
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xpath_.setNamespaceContext(*this);
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xpath_.setFunctionResolver(*this);
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xpath_.setVariableCompileTimeResolver(*this);
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} // CompilationContext
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~CompilationContext()
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{
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// delete any left over - will only be the case if unwinding
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while(handlerStack_.size() > 1)
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{
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delete handlerStack_.top();
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handlerStack_.pop();
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} // while ...
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} // ~CompilationContext
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void root(DefaultHandlerT& root)
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{
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handlerStack_.push(&root);
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} // root
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StylesheetParserT& parser() const { return parser_; }
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XPathExpressionPtrT xpath_expression(const string_type& expr) const { return xpath_.compile_expr(expr); }
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XPathExpressionPtrT xpath_expression_no_variables(const string_type& expr) const
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{
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Disallow variables(variables_allowed_);
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return xpath_expression(expr);
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} // xpath_expression_no_variables
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std::vector<MatchExprT> xpath_match(const string_type& match) const
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{
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Disallow current(current_allowed_);
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return xpath_.compile_match(match);
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} // xpath_match
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std::vector<Arabica::XPath::MatchExpr<string_type> > xpath_match_no_variables(const string_type& match) const
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{
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Disallow variables(variables_allowed_);
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return xpath_match(match);
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} // xpath_match_no_variables
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XPathExpressionPtrT xpath_attribute_value_template(const string_type& expr) const { return xpath_.compile_attribute_value_template(expr); }
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CompiledStylesheetT& stylesheet() const { return stylesheet_; }
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QualifiedNameT processElementQName(const string_type& qName) const
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{
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return parser_.processElementQName(qName);
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} // processElementQName
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QualifiedNameT processInternalQName(const string_type& qName) const
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{
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return parser_.processInternalQName(qName);
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} // processInternalQName
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string_type makeAbsolute(const string_type& href) const
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{
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return parser_.makeAbsolute(href);
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} // makeAbsolute
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string_type setBase(const string_type& href) const
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{
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return parser_.setBase(href);
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} // setBase
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string_type currentBase() const
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{
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return parser_.currentBase();
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} // currentBase
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void push(ItemContainer<string_type, string_adaptor>* parent,
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DefaultHandlerT* newHandler,
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const string_type& namespaceURI,
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const string_type& localName,
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const string_type& qName,
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const AttributesT& atts)
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{
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parentStack_.push(parent);
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handlerStack_.push(newHandler);
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parser_.setContentHandler(*newHandler);
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newHandler->startElement(namespaceURI, localName, qName, atts);
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} // push
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void pop()
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{
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parentStack_.pop();
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delete handlerStack_.top();
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handlerStack_.pop();
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parser_.setContentHandler(*handlerStack_.top());
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} // pop
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ItemContainer<string_type, string_adaptor>& parentContainer() const
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{
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return *parentStack_.top();
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} // parentContainer
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ContentHandlerT& parentHandler() const
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{
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parser_.setContentHandler(*handlerStack_.top());
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return parser_.contentHandler();
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} // parentHandler
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std::map<string_type, string_type> inScopeNamespaces() const
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{
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return parser_.inScopeNamespaces();
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} // inScopeNamespaces
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void addNamespaceAlias(const string_type& stylesheet_namespace,
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const string_type& result_prefix,
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const string_type& result_namespace)
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{
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namespaceRemap_[stylesheet_namespace] = std::make_pair(result_prefix, result_namespace);
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} // addNamespaceAlias
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bool isRemapped(const string_type& namespaceURI) const
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{
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return namespaceRemap_.find(namespaceURI) != namespaceRemap_.end();
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} // isRemapped
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const std::pair<string_type, string_type>& remappedNamespace(const string_type& namespaceURI)
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{
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return namespaceRemap_[namespaceURI];
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} // remappedNamespace
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string_type autoNamespacePrefix() const
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{
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std::ostringstream ss;
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ss << "auto-ns" << autoNs_++;
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return ss.str();
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} // autoNamespacePrefix
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void set_precedence(const Precedence& prec)
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{
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precedence_ = prec;
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} // set_precedence
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Precedence next_precedence()
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{
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return precedence_.next_generation();
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} // next_precedence
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const Precedence& precedence() const
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{
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return precedence_;
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} // precedence
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private:
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virtual Arabica::XPath::XPathExpression_impl<string_type, Arabica::default_string_adaptor<string_type> >*
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compileVariable(const string_type& namespace_uri, const string_type& name) const
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{
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if(!variables_allowed_)
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return 0;
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return CTVariableResolverT::compileVariable(namespace_uri, name);
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} // compileVariable
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// FunctionResolver
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virtual Arabica::XPath::XPathFunction<string_type>* resolveFunction(
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const string_type& namespace_uri,
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const string_type& name,
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const std::vector<Arabica::XPath::XPathExpression<string_type> >& argExprs) const
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{
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if(!namespace_uri.empty())
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return new Functions<string_type, string_adaptor>::UndefinedFunction(namespace_uri, name, argExprs);
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// document
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if(name == "document")
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return new Functions<string_type, string_adaptor>::DocumentFunction(parser_.currentBase(), argExprs);
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// key
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if(name == "key")
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return new Functions<string_type, string_adaptor>::KeyFunction(stylesheet_.keys(), parser_.inScopeNamespaces(), argExprs);
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// format-number
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// current
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if((name == "current") && (current_allowed_))
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return new Functions<string_type, string_adaptor>::CurrentFunction(argExprs);
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// unparsed-entity-uri
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//if(name == "unparsed-entity-uri")
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// return new UnparsedEntityUriFunction(argExprs);
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// generate-id
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if(name == "generate-id")
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return new Functions<string_type, string_adaptor>::GenerateIdFunction(argExprs);
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if(name == "system-property")
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return new Functions<string_type, string_adaptor>::SystemPropertyFunction(argExprs);
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// element-available
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if(name == "element-available")
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{
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std::vector<std::pair<string_type, string_type> > dummy;
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return new Functions<string_type, string_adaptor>::ElementAvailableFunction(dummy, parser_.inScopeNamespaces(), argExprs);
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}
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// function-available
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if(name == "function-available")
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return new Functions<string_type, string_adaptor>::FunctionAvailableFunction(validNames(), parser_.inScopeNamespaces(), argExprs);
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return 0;
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} // resolveFunction
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virtual std::vector<std::pair<string_type, string_type> > validNames() const
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{
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static const char* functionNames[] = { "document", "key", /* format-number, */ "current",
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/* unparsed-entity-uri, */ "generate-id", "system-property",
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/* element-available, */ "function-available", 0 };
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std::vector<std::pair<string_type,string_type> > names;
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for(int i = 0; functionNames[i] != 0; ++i)
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names.push_back(std::make_pair("", functionNames[i]));
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return names;
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} // validNames
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// NamespaceContext
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virtual string_type namespaceURI(const string_type& prefix) const
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{
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return parser_.namespaceURI(prefix);
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} // namespaceURI
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typedef std::pair<string_type, string_type> Namespace;
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StylesheetParser<string_type, string_adaptor>& parser_;
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CompiledStylesheetT& stylesheet_;
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mutable int autoNs_;
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mutable bool current_allowed_;
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mutable bool variables_allowed_;
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Precedence precedence_;
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Arabica::XPath::XPath<string_type> xpath_;
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std::stack<SAX::DefaultHandler<string_type>*> handlerStack_;
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std::stack<ItemContainer<string_type, string_adaptor>*> parentStack_;
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std::map<string_type, Namespace> namespaceRemap_;
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CompilationContext(const CompilationContext&);
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class Disallow
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{
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public:
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Disallow(bool& allow) : allow_(allow) { allow_ = false; }
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~Disallow() { allow_ = true; }
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private:
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bool& allow_;
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}; // DisallowCurrent
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}; // class CompilationContext
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} // namespace XSLT
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} // namespace Arabica
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#endif // ARABICA_XSLT_COMPILATION_CONTEXT
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