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// Copyright (c) 1996 James Clark
// See the file copying.txt for copying permission.
#ifndef ProcessContext_INCLUDED
#define ProcessContext_INCLUDED 1
#include "Resource.h"
#include "Ptr.h"
#include "Vector.h"
#include "NCVector.h"
#include "Owner.h"
#include "Collector.h"
#include "Style.h"
#include "FOTBuilder.h"
#include "ELObj.h"
#include "SosofoObj.h"
#include "VM.h"
#include "ProcessingMode.h"
#include "Link.h"
#include "IList.h"
#include "IQueue.h"
#ifdef DSSSL_NAMESPACE
namespace DSSSL_NAMESPACE {
#endif
class Expression;
class ProcessContext : public Collector::DynamicRoot {
public:
ProcessContext(Interpreter &, FOTBuilder &);
FOTBuilder ¤tFOTBuilder();
StyleStack ¤tStyleStack();
void process(const NodePtr &);
void processNode(const NodePtr &, const ProcessingMode *, bool chunk = 1);
void processNodeSafe(const NodePtr &, const ProcessingMode *, bool chunk = 1);
void nextMatch(StyleObj *);
void processChildren(const ProcessingMode *);
void processChildrenTrim(const ProcessingMode *);
void trace(Collector &) const;
void startFlowObj();
void endFlowObj();
// Uses of label: do this
void startConnection(SymbolObj *, const Location &);
void endConnection();
// happens only for objcet with a non-principal port
void pushPorts(bool hasPrincipalPort,
const Vector<SymbolObj *> &ports, const Vector<FOTBuilder *> &fotbs);
void popPorts();
// happens inside pushPorts() (if any)
void startMapContent(ELObj *, const Location &);
void endMapContent();
void startDiscardLabeled(SymbolObj *);
void endDiscardLabeled();
// table support
void startTable();
void endTable();
void startTablePart();
void endTablePart();
void addTableColumn(unsigned columnIndex, unsigned span, StyleObj *);
unsigned currentTableColumn();
void noteTableCell(unsigned colIndex, unsigned colSpan, unsigned rowSpan);
StyleObj *tableColumnStyle(unsigned columnIndex, unsigned span);
StyleObj *tableRowStyle();
void startTableRow(StyleObj *);
bool inTable() const;
bool inTableRow();
void endTableRow();
void clearPageType();
void setPageType(unsigned);
bool getPageType(unsigned &) const;
VM &vm();
private:
ProcessContext(const ProcessContext &); // undefined
void operator=(const ProcessContext &); // undefined
void badContentMap(bool &, const Location &);
void coverSpannedRows();
void restoreConnection(unsigned connectableLevel, size_t portIndex);
struct Port {
Port();
FOTBuilder *fotb;
IQueue<SaveFOTBuilder> saveQueue;
Vector<SymbolObj *> labels;
unsigned connected;
};
// A flow object with a port that can be connected to.
struct Connectable;
friend struct Connectable;
struct Connectable : public Link {
Connectable(int nPorts, const StyleStack &, unsigned);
NCVector<Port> ports;
StyleStack styleStack;
unsigned flowObjLevel;
Vector<SymbolObj *> principalPortLabels;
};
// An connection between a flow object and its flow parent
// made with label:.
struct Connection;
friend struct Connection;
struct Connection : public Link {
Connection(FOTBuilder *);
Connection(const StyleStack &, Port *, unsigned connectableLevel);
FOTBuilder *fotb;
StyleStack styleStack;
Port *port;
unsigned connectableLevel;
unsigned nBadFollow;
};
struct Table : public Link {
Table();
unsigned currentColumn;
// first index is column (zero-based)
// second is span - 1.
Vector<Vector<StyleObj *> > columnStyles;
// for each column, how many rows are covered
// starting with the current row
Vector<unsigned> covered;
unsigned nColumns;
StyleObj *rowStyle;
bool inTableRow;
unsigned rowConnectableLevel;
};
struct NodeStackEntry {
unsigned long elementIndex;
unsigned groveIndex;
const ProcessingMode *processingMode;
};
FOTBuilder ignoreFotb_;
IList<Connection> connectionStack_;
IList<Connectable> connectableStack_;
unsigned connectableStackLevel_;
IList<Table> tableStack_;
NCVector<IQueue<SaveFOTBuilder> > principalPortSaveQueues_;
VM vm_;
ProcessingMode::Specificity matchSpecificity_;
unsigned flowObjLevel_;
bool havePageType_;
unsigned pageType_;
Vector<NodeStackEntry> nodeStack_;
friend class CurrentNodeSetter;
friend struct Table;
};
inline
FOTBuilder &ProcessContext::currentFOTBuilder()
{
return *connectionStack_.head()->fotb;
}
inline
StyleStack &ProcessContext::currentStyleStack()
{
return connectionStack_.head()->styleStack;
}
inline
VM &ProcessContext::vm()
{
return vm_;
}
inline
void ProcessContext::startFlowObj()
{
flowObjLevel_++;
}
inline
void ProcessContext::setPageType(unsigned n)
{
havePageType_ = 1;
pageType_ = n;
}
inline
void ProcessContext::clearPageType()
{
havePageType_ = 0;
}
inline
bool ProcessContext::getPageType(unsigned &n) const
{
if (!havePageType_)
return 0;
n = pageType_;
return 1;
}
inline
bool ProcessContext::inTable() const
{
return !tableStack_.empty();
}
#ifdef DSSSL_NAMESPACE
}
#endif
#endif /* not ProcessContext_INCLUDED */
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