src/tex2lyx/context.C

   1 /**
   2  * \file context.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Jean-Marc Lasgouttes
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include <iostream>
  14
  15 #include "support/lstrings.h"
  16 #include "context.h"
  17
  18 using std::ostream;
  19 using std::endl;
  20 using std::string;
  21
  22
  23 namespace {
  24
  25 void begin_layout(ostream & os, LyXLayout_ptr layout, Font const & font,
  26                   Font const & normalfont)
  27 {
  28         os << "\n\\begin_layout " << layout->name() << "\n";
  29         // FIXME: This is not enough for things like
  30         // \\Huge par1 \\par par2
  31         output_font_change(os, normalfont, font);
  32 }
  33
  34
  35 void end_layout(ostream & os)
  36 {
  37         os << "\n\\end_layout\n";
  38 }
  39
  40
  41 void begin_deeper(ostream & os)
  42 {
  43         os << "\n\\begin_deeper";
  44 }
  45
  46
  47 void end_deeper(ostream & os)
  48 {
  49         os << "\n\\end_deeper";
  50 }
  51
  52 }
  53
  54
  55 bool operator==(Font const & f1, Font const & f2)
  56 {
  57         return
  58                 f1.size == f2.size &&
  59                 f1.family == f2.family &&
  60                 f1.series == f2.series &&
  61                 f1.shape == f2.shape;
  62 }
  63
  64
  65 void output_font_change(ostream & os, Font const & oldfont,
  66                         Font const & newfont)
  67 {
  68         if (oldfont.family != newfont.family)
  69                 os << "\n\\family " << newfont.family << '\n';
  70         if (oldfont.series != newfont.series)
  71                 os << "\n\\series " << newfont.series << '\n';
  72         if (oldfont.shape != newfont.shape)
  73                 os << "\n\\shape " << newfont.shape << '\n';
  74         if (oldfont.size != newfont.size)
  75                 os << "\n\\size " << newfont.size << '\n';
  76 }
  77
  78
  79 Font Context::normalfont;
  80 bool Context::empty = true;
  81
  82
  83 Context::Context(bool need_layout_,
  84                  LyXTextClass const & textclass_,
  85                  LyXLayout_ptr layout_, LyXLayout_ptr parent_layout_,
  86                  Font font_)
  87         : need_layout(need_layout_),
  88           need_end_layout(false), need_end_deeper(false),
  89           has_item(false), deeper_paragraph(false),
  90           new_layout_allowed(true), textclass(textclass_),
  91           layout(layout_), parent_layout(parent_layout_),
  92           font(font_)
  93 {
  94         if (!layout.get())
  95                 layout = textclass.defaultLayout();
  96         if (!parent_layout.get())
  97                 parent_layout = textclass.defaultLayout();
  98 }
  99
 100
 101 Context::~Context()
 102 {
 103         if (!extra_stuff.empty())
 104                 std::cerr << "Bug: Ignoring extra stuff '" << extra_stuff
 105                           << '\'' << std::endl;
 106 }
 107
 108
 109 void Context::check_layout(ostream & os)
 110 {
 111         if (need_layout) {
 112                 check_end_layout(os);
 113
 114                 // are we in a list-like environment?
 115                 if (layout->isEnvironment()
 116                     && layout->latextype != LATEX_ENVIRONMENT) {
 117                         // A list-like environment
 118                         if (has_item) {
 119                                 // a new item. If we had a standard
 120                                 // paragraph before, we have to end it.
 121                                 if (deeper_paragraph) {
 122                                         end_deeper(os);
 123                                         deeper_paragraph = false;
 124                                 }
 125                                 begin_layout(os, layout, font, normalfont);
 126                                 has_item = false;
 127                         } else {
 128                                 // a standard paragraph in an
 129                                 // enumeration. We have to recognize
 130                                 // that this may require a begin_deeper.
 131                                 if (!deeper_paragraph)
 132                                         begin_deeper(os);
 133                                 begin_layout(os, textclass.defaultLayout(),
 134                                              font, normalfont);
 135                                 deeper_paragraph = true;
 136                         }
 137                         need_layout = false;
 138                 } else {
 139                         // No list-like environment
 140                         begin_layout(os, layout, font, normalfont);
 141                         need_layout=false;
 142                 }
 143                 need_end_layout = true;
 144                 if (!extra_stuff.empty()) {
 145                         os << extra_stuff;
 146                         extra_stuff.erase();
 147                 }
 148                 os << "\n";
 149                 empty = false;
 150         }
 151 }
 152
 153
 154 void Context::check_end_layout(ostream & os)
 155 {
 156         if (need_end_layout) {
 157                 end_layout(os);
 158                 need_end_layout = false;
 159         }
 160 }
 161
 162
 163 void Context::check_deeper(ostream & os)
 164 {
 165         if (parent_layout->isEnvironment()) {
 166                 // We start a nested environment.
 167                 // We need to increase the depth.
 168                 if (need_end_deeper) {
 169                         // no need to have \end_deeper \begin_deeper
 170                         need_end_deeper = false;
 171                 } else {
 172                         begin_deeper(os);
 173                         need_end_deeper = true;
 174                 }
 175         } else
 176                 check_end_deeper(os);
 177 }
 178
 179
 180 void Context::check_end_deeper(ostream & os)
 181 {
 182         if (need_end_deeper) {
 183                 end_deeper(os);
 184                 need_end_deeper = false;
 185         }
 186         if (deeper_paragraph) {
 187                 end_deeper(os);
 188                 deeper_paragraph = false;
 189         }
 190 }
 191
 192
 193 void Context::set_item()
 194 {
 195         need_layout = true;
 196         has_item = true;
 197 }
 198
 199
 200 void Context::new_paragraph(ostream & os)
 201 {
 202         check_end_layout(os);
 203         need_layout = true;
 204 }
 205
 206
 207 void Context::add_extra_stuff(std::string const & stuff)
 208 {
 209         if (!lyx::support::contains(extra_stuff, stuff))
 210                 extra_stuff += stuff;
 211 }
 212
 213
 214 void Context::dump(ostream & os, string const & desc) const
 215 {
 216         os << "\n" << desc <<" [";
 217         if (need_layout)
 218                 os << "need_layout ";
 219         if (need_end_layout)
 220                 os << "need_end_layout ";
 221         if (need_end_deeper)
 222                 os << "need_end_deeper ";
 223         if (has_item)
 224                 os << "has_item ";
 225         if (deeper_paragraph)
 226                 os << "deeper_paragraph ";
 227         if (new_layout_allowed)
 228                 os << "new_layout_allowed ";
 229         if (!extra_stuff.empty())
 230                 os << "extrastuff=[" << extra_stuff << "] ";
 231         os << "textclass=" << textclass.name()
 232            << " layout=" << layout->name()
 233            << " parent_layout=" << parent_layout->name() << "] font=["
 234            << font.size << ' ' << font.family << ' ' << font.series << ' '
 235            << font.shape << ']' << endl;
 236 }