src/Counters.h

   1 // -*- C++ -*-
   2 /**
   3  * \file Counters.h
   4  * This file is part of LyX, the document processor.
   5  * Licence details can be found in the file COPYING.
   6  *
   7  * \author Lars Gullik Bjønnes
   8  * \author Jean-Marc Lasgouttes
   9  * \author John Levon
  10  * \author Martin Vermeer
  11  *
  12  * Full author contact details are available in file CREDITS.
  13  */
  14
  15 #ifndef COUNTERS_H
  16 #define COUNTERS_H
  17
  18 #include "support/docstring.h"
  19
  20 #include <map>
  21 #include <set>
  22
  23
  24 namespace lyx {
  25
  26 class Lexer;
  27
  28 /// This represents a single counter.
  29 class Counter {
  30 public:
  31         ///
  32         Counter();
  33         ///
  34         Counter(docstring const & mc, docstring const & ls,
  35                 docstring const & lsa);
  36         /// \return true on success
  37         bool read(Lexer & lex);
  38         ///
  39         void set(int v);
  40         ///
  41         void addto(int v);
  42         ///
  43         int value() const;
  44         ///
  45         void step();
  46         ///
  47         void reset();
  48         /// Returns the master counter of this counter.
  49         docstring const & master() const;
  50         /// Returns a LaTeX-like string to format the counter.
  51         /** This is similar to what one gets in LaTeX when using
  52          *  "\the<counter>".
  53          */
  54         docstring const & labelString() const;
  55         /// Returns a LaTeX-like string to format the counter in appendix.
  56         /** This is similar to what one gets in LaTeX when using
  57          *  "\the<counter>" in an appendix.
  58          */
  59         docstring const & labelStringAppendix() const;
  60 private:
  61         ///
  62         int value_;
  63         /// contains master counter name.
  64         /** The master counter is the counter that, if stepped
  65          *  (incremented) zeroes this counter. E.g. "subsection"'s
  66          *  master is "section".
  67          */
  68         docstring master_;
  69         /// Contains a LaTeX-like string to format the counter.
  70         docstring labelstring_;
  71         /// The same as labelstring_, but in appendices.
  72         docstring labelstringappendix_;
  73 };
  74
  75
  76 /// This is a class of (La)TeX type counters.
  77 /// Every instantiation is an array of counters of type Counter.
  78 class Counters {
  79 public:
  80         ///
  81         Counters() : appendix_(false), subfloat_(false) {}
  82         /// Add new counter newc having masterc as its master,
  83         /// ls as its label, and lsa as its appendix label.
  84         void newCounter(docstring const & newc,
  85                         docstring const & masterc,
  86                         docstring const & ls,
  87                         docstring const & lsa);
  88         /// Checks whether the given counter exists.
  89         bool hasCounter(docstring const & c) const;
  90         /// reads the counter name
  91         /// \return true on success
  92         bool read(Lexer & lex, docstring const & name);
  93         ///
  94         void set(docstring const & ctr, int val);
  95         ///
  96         void addto(docstring const & ctr, int val);
  97         ///
  98         int value(docstring const & ctr) const;
  99         /// Increment by one counter named by arg, and zeroes slave
 100         /// counter(s) for which it is the master.
 101         /** Sub-slaves not zeroed! That happens at slave's first step
 102          *  0->1. Seems to be sufficient.
 103          */
 104         void step(docstring const & ctr);
 105         /// Reset all counters.
 106         void reset();
 107         /// Reset counters matched by match string.
 108         void reset(docstring const & match);
 109         /// Copy counters whose name matches match from the &from to
 110         /// the &to array of counters. Empty string matches all.
 111         void copy(Counters & from, Counters & to,
 112                   docstring const & match = docstring());
 113         /// returns the expanded string representation of the counter.
 114         docstring theCounter(docstring const & c);
 115         /// Replace om format all the LaTeX-like macros that depend on
 116         /// counters.
 117         docstring counterLabel(docstring const & format,
 118                                std::set<docstring> * callers = 0);
 119         /// Are we in apendix?
 120         bool appendix() const { return appendix_; };
 121         /// Set the state variable indicating whether we are in appendix.
 122         void appendix(bool a) { appendix_ = a; };
 123         /// Returns the current enclosing float.
 124         std::string const & current_float() const { return current_float_; }
 125         /// Sets the current enclosing float.
 126         void current_float(std::string const & f) { current_float_ = f; }
 127         /// Are we in a subfloat?
 128         bool isSubfloat() const { return subfloat_; }
 129         /// Set the state variable indicating whether we are in a subfloat.
 130         void isSubfloat(bool s) { subfloat_ = s; };
 131 private:
 132         /// returns the expanded string representation of the counter
 133         /// with recursion protection through callers.
 134         docstring theCounter(docstring const & c,
 135                              std::set<docstring> & callers);
 136         /// Returns the value of the counter according to the
 137         /// numbering scheme numbertype.
 138         /** Available numbering schemes are arabic (1, 2,...), roman
 139          *  (i, ii,...), Roman (I, II,...), alph (a, b,...), Alpha (A,
 140          *  B,...) and hebrew.
 141          */
 142         docstring labelItem(docstring const & ctr,
 143                             docstring const & numbertype);
 144         /// Maps counter (layout) names to actual counters.
 145         typedef std::map<docstring, Counter> CounterList;
 146         /// Instantiate.
 147         CounterList counterList;
 148         /// Are we in an appendix?
 149         bool appendix_;
 150         /// The current enclosing float.
 151         std::string current_float_;
 152         /// Are we in a subfloat?
 153         bool subfloat_;
 154 };
 155
 156
 157 } // namespace lyx
 158
 159 #endif