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 Bjønnes
* \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 "OutputEnums.h"
#include "support/docstring.h"
#include <map>
#include <vector>
namespace lyx {
class Layout;
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;
/// Checks if the master counter is cnt, and if so removes
/// it. This is used when a counter is deleted.
/// \return whether we removed the master.
bool checkAndRemoveMaster(docstring const & cnt);
/// Returns a LaTeX-like string to format the counter.
/** This is similar to what one gets in LaTeX when using
* "\the<counter>". The \c in_appendix bool tells whether we
* want the version shown in an appendix.
*/
docstring const & labelString(bool in_appendix) const;
/// Similar, but used for formatted references in XHTML output.
/// E.g., for a section counter it might be "section \thesection"
docstring const & prettyFormat() const { return prettyformat_; }
/// Returns a map of LaTeX-like strings to format the counter.
/** For each language, the string is similar to what one gets
* in LaTeX when using "\the<counter>". The \c in_appendix
* bool tells whether we want the version shown in an
* appendix. This version does not contain any \\the<counter>
* expression.
*/
typedef std::map<std::string, docstring> StringMap;
StringMap & flatLabelStrings(bool in_appendix) const;
private:
///
int value_;
/// This is actually one less than the initial value, since the
/// counter is always stepped before being used.
int initial_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_;
/// Similar, but used for formatted references in XHTML output
docstring prettyformat_;
/// Cache of the labelstring with \\the<counter> expressions expanded,
/// indexed by language
mutable StringMap flatlabelstring_;
/// Cache of the appendix labelstring with \\the<counter> expressions expanded,
/// indexed by language
mutable StringMap flatlabelstringappendix_;
};
/// This is a class of (La)TeX type counters.
/// Every instantiation is an array of counters of type Counter.
class Counters {
public:
/// NOTE Do not call this in an attempt to clear the counters.
/// That will wipe out all the information we have about them
/// from the document class (e.g., which ones are defined).
/// Instead, call Counters::reset().
Counters();
/// 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
/// \param makeNew whether to make a new counter if one
/// doesn't already exist
/// \return true on success
bool read(Lexer & lex, docstring const & name, bool makenew);
///
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 are not zeroed! That happens at slave's first
/// step 0->1. Seems to be sufficient.
/// \param utype determines whether we track the counters.
void step(docstring const & ctr, UpdateType utype);
/// Reset all counters, and all the internal data structures
/// used for keeping track of their values.
void reset();
/// Reset counters matched by match string.
void reset(docstring const & match);
/// Remove counter \p cnt.
bool remove(docstring const & cnt);
/// 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 counter \c
* c. The \c lang code is used to translate the string.
*/
docstring theCounter(docstring const & c,
std::string const & lang) const;
/** Replace in \c format all the LaTeX-like macros that depend
* on counters. The \c lang code is used to translate the
* string.
*/
docstring counterLabel(docstring const & format,
std::string const & lang) const;
/// returns a formatted version of the counter, using the
/// format given by Counter::prettyFormat().
docstring prettyCounter(docstring const & cntr,
std::string const & lang) const;
/// Are we in appendix?
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; }
/// Are we in a longtable?
bool isLongtable() const { return longtable_; }
/// Set the state variable indicating whether we are in a longtable.
void isLongtable(bool s) { longtable_ = s; }
/// \name refstepcounter
// @{
/// The currently active counter, so far as references go.
/// We're trying to track \refstepcounter in LaTeX, more or less.
/// Note that this may be empty.
docstring currentCounter() const;
/// Called during updateBuffer() as we go through various paragraphs,
/// to track the layouts as we go through.
void setActiveLayout(Layout const & lay);
/// Also for updateBuffer().
/// Call this when entering things like footnotes, where there is now
/// no "last layout" and we want to restore the "last layout" on exit.
void clearLastLayout() { layout_stack_.push_back(0); }
/// Call this when exiting things like footnotes.
void restoreLastLayout() { layout_stack_.pop_back(); }
///
void saveLastCounter()
{ counter_stack_.push_back(counter_stack_.back()); }
///
void restoreLastCounter() { counter_stack_.pop_back(); }
// @}
private:
/** expands recursively any \\the<counter> macro in the
* labelstring of \c counter. The \c lang code is used to
* translate the string.
*/
docstring flattenLabelString(docstring const & counter, bool in_appendix,
std::string const &lang,
std::vector<docstring> & callers) const;
/// 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) const;
/// Used for managing the counter_stack_.
// @{
void beginEnvironment();
void endEnvironment();
// @}
/// 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_;
/// Are we in a longtable?
bool longtable_;
/// Used to keep track of active counters.
std::vector<docstring> counter_stack_;
/// Same, but for last layout.
std::vector<Layout const *> layout_stack_;
};
} // namespace lyx
#endif