src/FontList.h

   1 /**
   2  * \file FontList.h
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Abdelrazak Younes
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #ifndef FONT_LIST_H
  12 #define FONT_LIST_H
  13
  14 #include "Font.h"
  15
  16 #include "support/types.h"
  17
  18 #include <vector>
  19
  20 namespace lyx {
  21
  22 /** A font entry covers a range of positions. Notice that the
  23     entries in the list are inserted in random order.
  24     I don't think it's worth the effort to implement a more effective
  25     datastructure, because the number of different fonts in a paragraph
  26     is limited. (Asger)
  27     Nevertheless, I decided to store fontlist_ using a sorted vector:
  28     fontlist_ = { {pos_1,font_1} , {pos_2,font_2} , ... } where
  29     pos_1 < pos_2 < ..., font_{i-1} != font_i for all i,
  30     and font_i covers the chars in positions pos_{i-1}+1,...,pos_i
  31     (font_1 covers the chars 0,...,pos_1) (Dekel)
  32 */
  33 class FontTable
  34 {
  35 public:
  36         ///
  37         FontTable(pos_type p, Font const & f)
  38                 : pos_(p), font_(f)
  39         {}
  40         ///
  41         pos_type pos() const { return pos_; }
  42         ///
  43         void pos(pos_type p) { pos_ = p; }
  44         ///
  45         Font const & font() const { return font_; }
  46         ///
  47         void font(Font const & f) { font_ = f;}
  48
  49 private:
  50         friend class FontList;
  51         /// End position of paragraph this font attribute covers
  52         pos_type pos_;
  53         /** Font. Interpretation of the font values:
  54         If a value is Font::INHERIT_*, it means that the font
  55         attribute is inherited from either the layout of this
  56         paragraph or, in the case of nested paragraphs, from the
  57         layout in the environment one level up until completely
  58         resolved.
  59         The values Font::IGNORE_* and FONT_TOGGLE are NOT
  60         allowed in these font tables.
  61         */
  62         Font font_;
  63 };
  64
  65 class LaTeXFeatures;
  66
  67 ///
  68 class FontList
  69 {
  70 public:
  71         typedef std::vector<FontTable> List;
  72         ///
  73         typedef List::iterator iterator;
  74         ///
  75         typedef List::const_iterator const_iterator;
  76         ///
  77         iterator begin() { return list_.begin(); }
  78         ///
  79         iterator end() { return list_.end(); }
  80         ///
  81         const_iterator begin() const { return list_.begin(); }
  82         ///
  83         const_iterator end() const { return list_.end(); }
  84         ///
  85         bool empty() const { return list_.empty(); }
  86         ///
  87         void clear() { list_.clear(); }
  88         ///
  89         void erase(pos_type pos);
  90         ///
  91         iterator fontIterator(pos_type pos);
  92         ///
  93         const_iterator fontIterator(pos_type pos) const;
  94         ///
  95         Font & get(pos_type pos);
  96         ///
  97         void set(pos_type pos, Font const & font);
  98         ///
  99         void setRange(
 100                 pos_type startpos,
 101                 pos_type endpos,
 102                 Font const & font);
 103         ///
 104         void increasePosAfterPos(pos_type pos);
 105         ///
 106         void decreasePosAfterPos(pos_type pos);
 107
 108         /// Returns the height of the highest font in range
 109         FontSize highestInRange(
 110                 pos_type startpos,
 111                 pos_type endpos,
 112                 FontSize def_size
 113                 ) const;
 114
 115         /// is there a font change in middle of the word?
 116         bool hasChangeInRange(
 117                 pos_type pos, ///< position in the paragraph.
 118                 int len ///< length of the range to check.
 119                 ) const;
 120
 121         ///
 122         void validate(LaTeXFeatures & features) const;
 123
 124 private:
 125         ///
 126         List list_;
 127 };
 128
 129 } // namespace lyx
 130
 131 #endif