src/insets/InsetNewline.cpp

   1 /**
   2  * \file InsetNewline.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author John Levon
   7  * \author Jürgen Spitzmüller
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 #include <config.h>
  13
  14 #include "InsetNewline.h"
  15
  16 #include "Cursor.h"
  17 #include "Dimension.h"
  18 #include "FuncRequest.h"
  19 #include "FuncStatus.h"
  20 #include "Lexer.h"
  21 #include "MetricsInfo.h"
  22 #include "OutputParams.h"
  23 #include "output_docbook.h"
  24 #include "output_xhtml.h"
  25 #include "texstream.h"
  26
  27 #include "frontends/Application.h"
  28 #include "frontends/FontMetrics.h"
  29 #include "frontends/Painter.h"
  30
  31 #include "support/debug.h"
  32 #include "support/docstream.h"
  33 #include "support/docstring.h"
  34
  35 using namespace std;
  36
  37 namespace lyx {
  38
  39 InsetNewline::InsetNewline() : Inset(nullptr)
  40 {}
  41
  42
  43 void InsetNewlineParams::write(ostream & os) const
  44 {
  45         switch (kind) {
  46         case InsetNewlineParams::NEWLINE:
  47                 os << "newline";
  48                 break;
  49         case InsetNewlineParams::LINEBREAK:
  50                 os <<  "linebreak";
  51                 break;
  52         }
  53 }
  54
  55
  56 void InsetNewlineParams::read(Lexer & lex)
  57 {
  58         string token;
  59         lex.setContext("InsetNewlineParams::read");
  60         lex >> token;
  61         if (token == "newline")
  62                 kind = InsetNewlineParams::NEWLINE;
  63         else if (token == "linebreak")
  64                 kind = InsetNewlineParams::LINEBREAK;
  65         else
  66                 lex.printError("Unknown kind: `$$Token'");
  67 }
  68
  69
  70 void InsetNewline::write(ostream & os) const
  71 {
  72         os << "Newline ";
  73         params_.write(os);
  74 }
  75
  76
  77 void InsetNewline::read(Lexer & lex)
  78 {
  79         params_.read(lex);
  80         lex >> "\\end_inset";
  81 }
  82
  83
  84 void InsetNewline::metrics(MetricsInfo & mi, Dimension & dim) const
  85 {
  86         frontend::FontMetrics const & fm = theFontMetrics(mi.base.font);
  87         dim.asc = fm.maxAscent();
  88         dim.des = fm.maxDescent();
  89         dim.wid = fm.width('n');
  90 }
  91
  92
  93 void InsetNewline::doDispatch(Cursor & cur, FuncRequest & cmd)
  94 {
  95         switch (cmd.action()) {
  96
  97         case LFUN_INSET_MODIFY: {
  98                 InsetNewlineParams params;
  99                 cur.recordUndo();
 100                 string2params(to_utf8(cmd.argument()), params);
 101                 params_.kind = params.kind;
 102                 break;
 103         }
 104
 105         default:
 106                 Inset::doDispatch(cur, cmd);
 107                 break;
 108         }
 109 }
 110
 111
 112 bool InsetNewline::getStatus(Cursor & cur, FuncRequest const & cmd,
 113         FuncStatus & status) const
 114 {
 115         switch (cmd.action()) {
 116         // we handle these
 117         case LFUN_INSET_MODIFY:
 118                 if (cmd.getArg(0) == "newline") {
 119                         InsetNewlineParams params;
 120                         string2params(to_utf8(cmd.argument()), params);
 121                         status.setOnOff(params_.kind == params.kind);
 122                 }
 123                 status.setEnabled(true);
 124                 return true;
 125         default:
 126                 return Inset::getStatus(cur, cmd, status);
 127         }
 128 }
 129
 130
 131 ColorCode InsetNewline::ColorName() const
 132 {
 133         switch (params_.kind) {
 134                 case InsetNewlineParams::NEWLINE:
 135                         return Color_eolmarker;
 136                         break;
 137                 case InsetNewlineParams::LINEBREAK:
 138                         return Color_pagebreak;
 139                         break;
 140         }
 141         // not really useful, but to avoids gcc complaints
 142         return Color_eolmarker;
 143 }
 144
 145
 146 void InsetNewline::latex(otexstream & os, OutputParams const & rp) const
 147 {
 148         switch (params_.kind) {
 149                 case InsetNewlineParams::NEWLINE:
 150                         if (!rp.newlinecmd.empty())
 151                                 os << "\\" << rp.newlinecmd << "\n";
 152                         else if (rp.inTableCell == OutputParams::PLAIN)
 153                                 os << "\\newline\n";
 154                         else
 155                                 os << "\\\\\n";
 156                         break;
 157                 case InsetNewlineParams::LINEBREAK:
 158                         os << "\\linebreak{}\n";
 159                         break;
 160                 default:
 161                         os << "\\\\\n";
 162                         break;
 163         }
 164 }
 165
 166
 167 int InsetNewline::plaintext(odocstringstream & os,
 168         OutputParams const &, size_t) const
 169 {
 170         os << '\n';
 171         return PLAINTEXT_NEWLINE;
 172 }
 173
 174
 175 void InsetNewline::docbook(XMLStream &, OutputParams const &) const
 176 {
 177         // New lines are handled by Paragraph::simpleDocBookOnePar.
 178 }
 179
 180
 181 docstring InsetNewline::xhtml(XMLStream & xs, OutputParams const &) const
 182 {
 183         xs << xml::CR() << xml::CompTag("br") << xml::CR();
 184         return docstring();
 185 }
 186
 187
 188 void InsetNewline::draw(PainterInfo & pi, int x, int y) const
 189 {
 190         FontInfo font;
 191         font.setColor(ColorName());
 192
 193         frontend::FontMetrics const & fm = theFontMetrics(pi.base.font);
 194         int const wid = fm.width('n');
 195         int const asc = fm.maxAscent();
 196
 197         int xp[3];
 198         int yp[3];
 199
 200         yp[0] = int(y - 0.875 * asc * 0.75);
 201         yp[1] = int(y - 0.500 * asc * 0.75);
 202         yp[2] = int(y - 0.125 * asc * 0.75);
 203
 204         if (pi.ltr_pos) {
 205                 xp[0] = int(x + wid * 0.375);
 206                 xp[1] = int(x);
 207                 xp[2] = int(x + wid * 0.375);
 208         } else {
 209                 xp[0] = int(x + wid * 0.625);
 210                 xp[1] = int(x + wid);
 211                 xp[2] = int(x + wid * 0.625);
 212         }
 213
 214         pi.pain.lines(xp, yp, 3, ColorName());
 215
 216         yp[0] = int(y - 0.500 * asc * 0.75);
 217         yp[1] = int(y - 0.500 * asc * 0.75);
 218         yp[2] = int(y - asc * 0.75);
 219
 220         if (pi.ltr_pos) {
 221                 xp[0] = int(x);
 222                 xp[1] = int(x + wid);
 223                 xp[2] = int(x + wid);
 224         } else {
 225                 xp[0] = int(x + wid);
 226                 xp[1] = int(x);
 227                 xp[2] = int(x);
 228         }
 229
 230         pi.pain.lines(xp, yp, 3, ColorName());
 231
 232         if (params_.kind == InsetNewlineParams::LINEBREAK) {
 233
 234                 yp[2] = int(y - 0.500 * asc * 0.75);
 235
 236                 if (pi.ltr_pos) {
 237                         xp[0] = int(x + 1.3 * wid);
 238                         xp[1] = int(x + 2 * wid);
 239                         xp[2] = int(x + 2 * wid);
 240                 } else {
 241                         xp[0] = int(x - 0.3 * wid);
 242                         xp[1] = int(x - wid);
 243                         xp[2] = int(x - wid);
 244                 }
 245                 pi.pain.lines(xp, yp, 3, ColorName());
 246
 247                 yp[0] = int(y - 0.875 * asc * 0.75);
 248                 yp[1] = int(y - 0.500 * asc * 0.75);
 249                 yp[2] = int(y - 0.125 * asc * 0.75);
 250
 251                 if (pi.ltr_pos) {
 252                         xp[0] = int(x + 2 * wid * 0.813);
 253                         xp[1] = int(x + 2 * wid);
 254                         xp[2] = int(x + 2 * wid * 0.813);
 255                 } else {
 256                         xp[0] = int(x - wid * 0.625);
 257                         xp[1] = int(x - wid);
 258                         xp[2] = int(x - wid * 0.625);
 259                 }
 260                 pi.pain.lines(xp, yp, 3, ColorName());
 261         }
 262 }
 263
 264
 265 string InsetNewline::contextMenuName() const
 266 {
 267         return "context-newline";
 268 }
 269
 270
 271 void InsetNewline::string2params(string const & in, InsetNewlineParams & params)
 272 {
 273         params = InsetNewlineParams();
 274         if (in.empty())
 275                 return;
 276         istringstream data(in);
 277         Lexer lex;
 278         lex.setStream(data);
 279         lex.setContext("InsetNewline::string2params");
 280         lex >> "newline";
 281         params.read(lex);
 282 }
 283
 284
 285 string InsetNewline::params2string(InsetNewlineParams const & params)
 286 {
 287         ostringstream data;
 288         data << "newline" << ' ';
 289         params.write(data);
 290         return data.str();
 291 }
 292
 293
 294 } // namespace lyx