lyx_mirror/src/Counters.h

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// -*- C++ -*-
/**
* \file Counters.h
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Lars Gullik Bj<EFBFBD>nnes
* \author Jean-Marc Lasgouttes
* \author John Levon
* \author Martin Vermeer
*
* Full author contact details are available in file CREDITS.
*/
#ifndef COUNTERS_H
#define COUNTERS_H
#include "support/docstring.h"
#include <map>
#include <set>
namespace lyx {
class Lexer;
/// This represents a single counter.
class Counter {
public:
///
Counter();
///
Counter(docstring const & mc, docstring const & ls,
docstring const & lsa);
/// \return true on success
bool read(Lexer & lex);
///
void set(int v);
///
void addto(int v);
///
int value() const;
///
void step();
///
void reset();
/// Returns the master counter of this counter.
docstring const & master() const;
/// Returns a LaTeX-like string to format the counter.
/** This is similar to what one gets in LaTeX when using
* "\the<counter>".
*/
docstring const & labelString() const;
/// Returns a LaTeX-like string to format the counter in appendix.
/** This is similar to what one gets in LaTeX when using
* "\the<counter>" in an appendix.
*/
docstring const & labelStringAppendix() const;
private:
///
int value_;
/// contains master counter name.
/** The master counter is the counter that, if stepped
* (incremented) zeroes this counter. E.g. "subsection"'s
* master is "section".
*/
docstring master_;
/// Contains a LaTeX-like string to format the counter.
docstring labelstring_;
/// The same as labelstring_, but in appendices.
docstring labelstringappendix_;
};
/// This is a class of (La)TeX type counters.
/// Every instantiation is an array of counters of type Counter.
class Counters {
public:
///
Counters() : appendix_(false), subfloat_(false) {}
/// Add new counter newc having masterc as its master,
/// ls as its label, and lsa as its appendix label.
void newCounter(docstring const & newc,
docstring const & masterc,
docstring const & ls,
docstring const & lsa);
/// Checks whether the given counter exists.
bool hasCounter(docstring const & c) const;
/// reads the counter name
/// \return true on success
bool read(Lexer & lex, docstring const & name);
///
void set(docstring const & ctr, int val);
///
void addto(docstring const & ctr, int val);
///
int value(docstring const & ctr) const;
/// Increment by one counter named by arg, and zeroes slave
/// counter(s) for which it is the master.
/** Sub-slaves not zeroed! That happens at slave's first step
* 0->1. Seems to be sufficient.
*/
void step(docstring const & ctr);
/// Reset all counters.
void reset();
/// Reset counters matched by match string.
void reset(docstring const & match);
/// Copy counters whose name matches match from the &from to
/// the &to array of counters. Empty string matches all.
void copy(Counters & from, Counters & to,
docstring const & match = docstring());
/// returns the expanded string representation of the counter.
docstring theCounter(docstring const & c);
/// Replace om format all the LaTeX-like macros that depend on
/// counters.
docstring counterLabel(docstring const & format,
std::set<docstring> * callers = 0);
/// Are we in apendix?
bool appendix() const { return appendix_; };
/// Set the state variable indicating whether we are in appendix.
void appendix(bool a) { appendix_ = a; };
/// Returns the current enclosing float.
std::string const & current_float() const { return current_float_; }
/// Sets the current enclosing float.
void current_float(std::string const & f) { current_float_ = f; }
/// Are we in a subfloat?
bool isSubfloat() const { return subfloat_; }
/// Set the state variable indicating whether we are in a subfloat.
void isSubfloat(bool s) { subfloat_ = s; };
private:
/// returns the expanded string representation of the counter
/// with recursion protection through callers.
docstring theCounter(docstring const & c,
std::set<docstring> & callers);
/// Returns the value of the counter according to the
/// numbering scheme numbertype.
/** Available numbering schemes are arabic (1, 2,...), roman
* (i, ii,...), Roman (I, II,...), alph (a, b,...), Alpha (A,
* B,...) and hebrew.
*/
docstring labelItem(docstring const & ctr,
docstring const & numbertype);
/// Maps counter (layout) names to actual counters.
typedef std::map<docstring, Counter> CounterList;
/// Instantiate.
CounterList counterList;
/// Are we in an appendix?
bool appendix_;
/// The current enclosing float.
std::string current_float_;
/// Are we in a subfloat?
bool subfloat_;
};
} // namespace lyx
#endif