mirror of
https://github.com/jezhiggins/arabica
synced 2024-12-29 22:23:27 +01:00
279 lines
11 KiB
C++
279 lines
11 KiB
C++
#ifndef ARABICA_XSLT_EXECUTION_CONTEXT_HPP
|
|
#define ARABICA_XSLT_EXECUTION_CONTEXT_HPP
|
|
|
|
#include <ostream>
|
|
#include "xslt_sink.hpp"
|
|
#include "xslt_variable_stack.hpp"
|
|
|
|
namespace Arabica
|
|
{
|
|
namespace XSLT
|
|
{
|
|
|
|
template<class string_type, class string_adaptor> class CompiledStylesheet;
|
|
template<class string_type, class string_adaptor> class ExecutionContext;
|
|
template<class string_type, class string_adaptor> class StackFrame;
|
|
template<class string_type, class string_adaptor> class ChainStackFrame;
|
|
|
|
template<class string_type, class string_adaptor>
|
|
class Variable_declaration
|
|
{
|
|
protected:
|
|
Variable_declaration() { }
|
|
|
|
public:
|
|
virtual const string_type& name() const = 0;
|
|
virtual Arabica::XPath::XPathValue<string_type> value(const DOM::Node<string_type, string_adaptor>& node,
|
|
ExecutionContext<string_type, string_adaptor>& context,
|
|
DOMSink<string_type, string_adaptor>& sink) const = 0;
|
|
virtual const Precedence& precedence() const = 0;
|
|
|
|
private:
|
|
Variable_declaration(const Variable_declaration&);
|
|
Variable_declaration& operator=(const Variable_declaration&);
|
|
bool operator==(const Variable_declaration&) const;
|
|
}; // class Variable_declaration
|
|
|
|
template<class string_type, class string_adaptor>
|
|
class ExecutionContext
|
|
{
|
|
public:
|
|
ExecutionContext(const CompiledStylesheet<string_type, string_adaptor>& stylesheet,
|
|
Sink<string_type, string_adaptor>& output,
|
|
std::basic_ostream<typename string_adaptor::value_type>& error_output) :
|
|
stylesheet_(stylesheet),
|
|
sink_(output.asOutput()),
|
|
message_sink_(error_output),
|
|
to_msg_(0)
|
|
{
|
|
xpathContext_.setVariableResolver(stack_);
|
|
sink_.set_warning_sink(message_sink_.asOutput());
|
|
message_sink_.asOutput().set_warning_sink(message_sink_.asOutput());
|
|
} // ExecutionContext
|
|
|
|
ExecutionContext(Sink<string_type, string_adaptor>& output,
|
|
ExecutionContext<string_type, string_adaptor>& rhs) :
|
|
stylesheet_(rhs.stylesheet_),
|
|
stack_(rhs.stack_),
|
|
sink_(output.asOutput()),
|
|
message_sink_(rhs.message_sink_),
|
|
to_msg_(false)
|
|
{
|
|
xpathContext_.setVariableResolver(stack_);
|
|
xpathContext_.setCurrentNode(rhs.xpathContext().currentNode());
|
|
xpathContext_.setPosition(rhs.xpathContext().position());
|
|
xpathContext_.setLast(rhs.xpathContext().last());
|
|
} // ExecutionContext
|
|
|
|
const CompiledStylesheet<string_type, string_adaptor>& stylesheet() const { return stylesheet_; }
|
|
|
|
Output<string_type, string_adaptor>& sink()
|
|
{
|
|
return !to_msg_ ? sink_ : message_sink_.asOutput();
|
|
} // sink
|
|
void redirectToMessageSink() { ++to_msg_; }
|
|
void revertFromMessageSink() { --to_msg_; }
|
|
|
|
const Arabica::XPath::ExecutionContext<string_type, string_adaptor>& xpathContext() const { return xpathContext_; }
|
|
|
|
void topLevelParam(const DOM::Node<string_type, string_adaptor>& node, const Variable_declaration<string_type, string_adaptor>& param);
|
|
string_type passParam(const DOM::Node<string_type, string_adaptor>& node, const Variable_declaration<string_type, string_adaptor>& param);
|
|
void unpassParam(const string_type& name);
|
|
void declareParam(const DOM::Node<string_type, string_adaptor>& node, const Variable_declaration<string_type, string_adaptor>& param);
|
|
void declareVariable(const DOM::Node<string_type, string_adaptor>& node, const Variable_declaration<string_type, string_adaptor>& variable);
|
|
void freezeTopLevel();
|
|
void injectGlobalScope(const typename ScopeType<string_type, string_adaptor>::Scope& scope);
|
|
|
|
void setPosition(const DOM::Node<string_type, string_adaptor>& current, size_t pos) { setPosition(current, static_cast<int>(pos)); }
|
|
void setPosition(const DOM::Node<string_type, string_adaptor>& current, int pos)
|
|
{
|
|
xpathContext_.setCurrentNode(current);
|
|
xpathContext_.setPosition(pos);
|
|
} // setPosition
|
|
|
|
int setLast(int last)
|
|
{
|
|
int old = xpathContext_.last();
|
|
xpathContext_.setLast(last);
|
|
return old;
|
|
} // setLast
|
|
|
|
private:
|
|
void pushStackFrame() { stack_.pushScope(); }
|
|
void chainStackFrame() { stack_.chainScope(); }
|
|
void popStackFrame() { stack_.popScope(); }
|
|
|
|
private:
|
|
const CompiledStylesheet<string_type, string_adaptor>& stylesheet_;
|
|
VariableStack<string_type, string_adaptor> stack_;
|
|
Arabica::XPath::ExecutionContext<string_type, string_adaptor> xpathContext_;
|
|
Output<string_type, string_adaptor>& sink_;
|
|
StreamSink<string_type, string_adaptor> message_sink_;
|
|
int to_msg_;
|
|
|
|
friend class StackFrame<string_type, string_adaptor> ;
|
|
friend class ChainStackFrame<string_type, string_adaptor> ;
|
|
}; // class ExecutionContext
|
|
|
|
///////////////////////////
|
|
template<class string_type, class string_adaptor>
|
|
class VariableClosure : public Variable_instance<string_type, string_adaptor>
|
|
{
|
|
public:
|
|
typedef typename ScopeType<string_type, string_adaptor>::Variable_instance_ptr Variable_instance_ptr;
|
|
typedef typename ScopeType<string_type, string_adaptor>::Scope Scope;
|
|
|
|
static Variable_instance_ptr create(const Variable_declaration<string_type, string_adaptor>& var,
|
|
const DOM::Node<string_type, string_adaptor>& node,
|
|
ExecutionContext<string_type, string_adaptor>& context)
|
|
{
|
|
return Variable_instance_ptr(new VariableClosure(var, node, context));
|
|
} // create
|
|
|
|
virtual const string_type& name() const { return var_.name(); }
|
|
virtual const Precedence& precedence() const { return var_.precedence(); }
|
|
|
|
virtual Arabica::XPath::XPathValue<string_type, string_adaptor> value() const
|
|
{
|
|
if(!value_)
|
|
value_ = var_.value(node_, context_, sink_);
|
|
return value_;
|
|
} // value
|
|
|
|
virtual void injectGlobalScope(const Scope& scope) const
|
|
{
|
|
context_.injectGlobalScope(scope);
|
|
} // globalScope
|
|
|
|
private:
|
|
VariableClosure(const Variable_declaration<string_type, string_adaptor>& var,
|
|
const DOM::Node<string_type, string_adaptor>& node,
|
|
ExecutionContext<string_type, string_adaptor>& context) :
|
|
var_(var),
|
|
sink_(),
|
|
node_(node),
|
|
context_(sink_, context)
|
|
{
|
|
} // VariableClosure
|
|
|
|
const Variable_declaration<string_type, string_adaptor>& var_;
|
|
mutable DOMSink<string_type, string_adaptor> sink_;
|
|
const DOM::Node<string_type, string_adaptor> node_;
|
|
mutable ExecutionContext<string_type, string_adaptor> context_;
|
|
mutable Arabica::XPath::XPathValue<string_type, string_adaptor> value_;
|
|
|
|
VariableClosure();
|
|
VariableClosure(const VariableClosure&);
|
|
VariableClosure& operator=(const VariableClosure&);
|
|
const VariableClosure& operator==(const VariableClosure&) const;
|
|
}; // class VariableClosure
|
|
|
|
///////////////////////////
|
|
template<class string_type, class string_adaptor>
|
|
void ExecutionContext<string_type, string_adaptor>::topLevelParam(const DOM::Node<string_type, string_adaptor>& node, const Variable_declaration<string_type, string_adaptor>& param)
|
|
{
|
|
stack_.topLevelParam(VariableClosure<string_type, string_adaptor>::create(param, node, *this));
|
|
} // topLevelParam
|
|
|
|
template<class string_type, class string_adaptor>
|
|
string_type ExecutionContext<string_type, string_adaptor>::passParam(const DOM::Node<string_type, string_adaptor>& node, const Variable_declaration<string_type, string_adaptor>& param)
|
|
{
|
|
return stack_.passParam(VariableClosure<string_type, string_adaptor>::create(param, node, *this));
|
|
} // passParam
|
|
|
|
template<class string_type, class string_adaptor>
|
|
void ExecutionContext<string_type, string_adaptor>::unpassParam(const string_type& name)
|
|
{
|
|
stack_.unpassParam(name);
|
|
} // unpassParam
|
|
|
|
template<class string_type, class string_adaptor>
|
|
void ExecutionContext<string_type, string_adaptor>::declareParam(const DOM::Node<string_type, string_adaptor>& node, const Variable_declaration<string_type, string_adaptor>& param)
|
|
{
|
|
if(!stack_.findPassedParam(param.name()))
|
|
stack_.declareParam(VariableClosure<string_type, string_adaptor>::create(param, node, *this));
|
|
} // declareParam
|
|
|
|
template<class string_type, class string_adaptor>
|
|
void ExecutionContext<string_type, string_adaptor>::declareVariable(const DOM::Node<string_type, string_adaptor>& node, const Variable_declaration<string_type, string_adaptor>& variable)
|
|
{
|
|
stack_.declareVariable(VariableClosure<string_type, string_adaptor>::create(variable, node, *this));
|
|
} // declareVariable
|
|
|
|
template<class string_type, class string_adaptor>
|
|
void ExecutionContext<string_type, string_adaptor>::freezeTopLevel()
|
|
{
|
|
stack_.freezeTopLevel();
|
|
} // freezeTopLevel
|
|
|
|
template<class string_type, class string_adaptor>
|
|
void ExecutionContext<string_type, string_adaptor>::injectGlobalScope(const typename ScopeType<string_type, string_adaptor>::Scope& scope)
|
|
{
|
|
stack_.injectGlobalScope(scope);
|
|
} // injectGlobalScope
|
|
|
|
///////////////////////////
|
|
template<class string_type, class string_adaptor>
|
|
class StackFrame
|
|
{
|
|
public:
|
|
StackFrame(ExecutionContext<string_type, string_adaptor>& context) : context_(context) { context_.pushStackFrame(); }
|
|
~StackFrame() { context_.popStackFrame(); }
|
|
|
|
private:
|
|
ExecutionContext<string_type, string_adaptor>& context_;
|
|
|
|
StackFrame(const StackFrame&);
|
|
StackFrame& operator=(const StackFrame&);
|
|
bool operator==(const StackFrame&) const;
|
|
}; // class StackFrame
|
|
|
|
template<class string_type, class string_adaptor>
|
|
class ChainStackFrame
|
|
{
|
|
public:
|
|
ChainStackFrame(ExecutionContext<string_type, string_adaptor>& context) : context_(context) { context_.chainStackFrame(); }
|
|
~ChainStackFrame() { context_.popStackFrame(); }
|
|
|
|
private:
|
|
ExecutionContext<string_type, string_adaptor>& context_;
|
|
|
|
ChainStackFrame(const ChainStackFrame&);
|
|
ChainStackFrame& operator=(const ChainStackFrame&);
|
|
bool operator==(const ChainStackFrame&) const;
|
|
}; // class ChainStackFrame
|
|
|
|
///////////////////////////
|
|
template<class string_type, class string_adaptor>
|
|
class LastFrame
|
|
{
|
|
public:
|
|
LastFrame(ExecutionContext<string_type, string_adaptor>& context, int last) : context_(context)
|
|
{
|
|
oldLast_ = context_.setLast(last);
|
|
} // LastFrame
|
|
|
|
LastFrame(ExecutionContext<string_type, string_adaptor>& context, size_t last) : context_(context)
|
|
{
|
|
oldLast_ = context_.setLast(static_cast<int>(last));
|
|
} // LastFrame
|
|
|
|
~LastFrame()
|
|
{
|
|
context_.setLast(oldLast_);
|
|
} // ~LastFrame
|
|
|
|
private:
|
|
ExecutionContext<string_type, string_adaptor>& context_;
|
|
int oldLast_;
|
|
|
|
LastFrame(const LastFrame&);
|
|
LastFrame& operator=(const LastFrame&);
|
|
bool operator==(const LastFrame&) const;
|
|
}; // class LastFrame
|
|
|
|
} // namespace XSLT
|
|
} // namespace Arabica
|
|
|
|
#endif // ARABICA_XSLT_EXECUTION_CONTEXT_HPP
|
|
|