src/mathed/InsetMathPhantom.cpp

   1 /**
   2  * \file InsetMathPhantom.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Georg Baum
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "InsetMathPhantom.h"
  14
  15 #include "LaTeXFeatures.h"
  16 #include "MathStream.h"
  17 #include "frontends/Painter.h"
  18
  19 #include <ostream>
  20
  21 namespace lyx {
  22
  23
  24 InsetMathPhantom::InsetMathPhantom(Buffer * buf, Kind k)
  25         : InsetMathNest(buf, 1), kind_(k)
  26 {}
  27
  28
  29 Inset * InsetMathPhantom::clone() const
  30 {
  31         return new InsetMathPhantom(*this);
  32 }
  33
  34
  35 void InsetMathPhantom::metrics(MetricsInfo & mi, Dimension & dim) const
  36 {
  37         cell(0).metrics(mi, dim);
  38         metricsMarkers(dim);
  39 }
  40
  41
  42 void InsetMathPhantom::draw(PainterInfo & pi, int x, int y) const
  43 {
  44         static int const arrow_size = 4;
  45
  46         // We first draw the text and then an arrow
  47         ColorCode const origcol = pi.base.font.color();
  48         if (visibleContents())
  49                 pi.base.font.setColor(Color_special);
  50         cell(0).draw(pi, x + 1, y);
  51         if (visibleContents())
  52                 pi.base.font.setColor(origcol);
  53         Dimension const dim = dimension(*pi.base.bv);
  54
  55         if (kind_ == phantom || kind_ == vphantom) {
  56                 // y1---------
  57                 //           / \.
  58                 // y2-----  / | \.
  59                 //            |
  60                 //            |
  61                 // y3-----  \ | /
  62                 //           \ /
  63                 // y4---------
  64                 //          | | |
  65                 //         /  |  \.
  66                 //        x1  x2 x3
  67
  68                 int const x2 = x + dim.wid / 2;
  69                 int const x1 = x2 - arrow_size;
  70                 int const x3 = x2 + arrow_size;
  71
  72                 int const y1 = y - dim.asc;
  73                 int const y2 = y1 + arrow_size;
  74                 int const y4 = y + dim.des;
  75                 int const y3 = y4 - arrow_size;
  76
  77                 // top arrow
  78                 pi.pain.line(x2, y1, x1, y2, Color_added_space);
  79                 pi.pain.line(x2, y1, x3, y2, Color_added_space);
  80
  81                 // bottom arrow
  82                 pi.pain.line(x2, y4, x1, y3, Color_added_space);
  83                 pi.pain.line(x2, y4, x3, y3, Color_added_space);
  84
  85                 // joining line
  86                 pi.pain.line(x2, y1, x2, y4, Color_added_space);
  87         }
  88
  89         if (kind_ == phantom || kind_ == hphantom) {
  90                 // y1----  /            \.
  91                 //        /              \.
  92                 // y2--- <---------------->
  93                 //        \              /
  94                 // y3----  \            /
  95                 //       |  |          |  |
  96                 //      x1 x2         x3 x4
  97
  98                 int const x1 = x;
  99                 int const x2 = x + arrow_size;
 100                 int const x4 = x + dim.wid;
 101                 int const x3 = x4 - arrow_size;
 102
 103                 int const y2 = y + (dim.des - dim.asc) / 2;
 104                 int const y1 = y2 - arrow_size;
 105                 int const y3 = y2 + arrow_size;
 106
 107                 // left arrow
 108                 pi.pain.line(x1, y2, x2, y3, Color_added_space);
 109                 pi.pain.line(x1, y2, x2, y1, Color_added_space);
 110
 111                 // right arrow
 112                 pi.pain.line(x4, y2, x3, y3, Color_added_space);
 113                 pi.pain.line(x4, y2, x3, y1, Color_added_space);
 114
 115                 // joining line
 116                 pi.pain.line(x1, y2, x4, y2, Color_added_space);
 117         }
 118
 119         else if (kind_ == mathclap) {
 120                 // y1----      \     /
 121                 //              \   /
 122                 // y2--- -------->-<--------
 123                 //              /   \.
 124                 // y3----      /     \.
 125                 //       |    |   |   |    |
 126                 //      x1   x2  x3  x4   x5
 127
 128                 int const x1 = x;
 129                 int const x5 = x + dim.wid;
 130                 int const x3 = x + dim.wid / 2;
 131                 int const x2 = std::max(x1, x3 - arrow_size);
 132                 int const x4 = std::min(x5, x3 + arrow_size);
 133
 134                 int const y2 = y + (dim.des - dim.asc) / 2;
 135                 int const y1 = y2 - arrow_size;
 136                 int const y3 = y2 + arrow_size;
 137
 138                 // left arrow
 139                 pi.pain.line(x2, y3, x3, y2, Color_added_space);
 140                 pi.pain.line(x2, y1, x3, y2, Color_added_space);
 141
 142                 // right arrow
 143                 pi.pain.line(x4, y3, x3, y2, Color_added_space);
 144                 pi.pain.line(x4, y1, x3, y2, Color_added_space);
 145
 146                 // joining line
 147                 pi.pain.line(x1, y2, x5, y2, Color_added_space);
 148         }
 149
 150         else if (kind_ == mathllap) {
 151                 // y1----                \.
 152                 //                        \.
 153                 // y2--- ------------------>
 154                 //                        /
 155                 // y3----                /
 156                 //       |              |  |
 157                 //      x1             x2 x3
 158
 159                 int const x1 = x;
 160                 int const x3 = x + dim.wid;
 161                 int const x2 = std::max(x1, x3 - arrow_size);
 162
 163                 int const y2 = y + (dim.des - dim.asc) / 2;
 164                 int const y1 = y2 - arrow_size;
 165                 int const y3 = y2 + arrow_size;
 166
 167                 // right arrow
 168                 pi.pain.line(x3, y2, x2, y3, Color_added_space);
 169                 pi.pain.line(x3, y2, x2, y1, Color_added_space);
 170
 171                 // joining line
 172                 pi.pain.line(x1, y2, x3, y2, Color_added_space);
 173         }
 174
 175         else if (kind_ == mathrlap) {
 176                 // y1----  /
 177                 //        /
 178                 // y2--- <------------------
 179                 //        \.
 180                 // y3----  \.
 181                 //       |  |              |
 182                 //      x1 x2             x3
 183
 184                 int const x1 = x;
 185                 int const x3 = x + dim.wid;
 186                 int const x2 = std::min(x3, x + arrow_size);
 187
 188                 int const y2 = y + (dim.des - dim.asc) / 2;
 189                 int const y1 = y2 - arrow_size;
 190                 int const y3 = y2 + arrow_size;
 191
 192                 // left arrow
 193                 pi.pain.line(x1, y2, x2, y3, Color_added_space);
 194                 pi.pain.line(x1, y2, x2, y1, Color_added_space);
 195
 196                 // joining line
 197                 pi.pain.line(x1, y2, x3, y2, Color_added_space);
 198         }
 199
 200         else if (kind_ == smash) {
 201                 // y1---------
 202                 //            |
 203                 // y2-----  \ | /
 204                 //           \ /
 205                 // y3-------- |
 206                 //           / \.
 207                 // y4-----  / | \.
 208                 //            |
 209                 // y5---------
 210                 //          | | |
 211                 //         /  |  \.
 212                 //        x1  x2 x3
 213
 214                 int const x2 = x + dim.wid / 2;
 215                 int const x1 = x2 - arrow_size;
 216                 int const x3 = x2 + arrow_size;
 217
 218                 int const y1 = y - dim.asc;
 219                 int const y5 = y + dim.des;
 220                 int const y3 = y;
 221                 int const y2 = std::max(y1, y3 - arrow_size);
 222                 int const y4 = std::min(y5, y3 + arrow_size);
 223
 224                 // top arrow
 225                 pi.pain.line(x1, y2, x2, y3, Color_added_space);
 226                 pi.pain.line(x3, y2, x2, y3, Color_added_space);
 227
 228                 // bottom arrow
 229                 pi.pain.line(x1, y4, x2, y3, Color_added_space);
 230                 pi.pain.line(x3, y4, x2, y3, Color_added_space);
 231
 232                 // joining line
 233                 pi.pain.line(x2, y1, x2, y5, Color_added_space);
 234         }
 235
 236         drawMarkers(pi, x, y);
 237 }
 238
 239
 240 void InsetMathPhantom::write(WriteStream & os) const
 241 {
 242         MathEnsurer ensurer(os);
 243         switch (kind_) {
 244         case phantom:
 245                 os << "\\phantom{";
 246                 break;
 247         case vphantom:
 248                 os << "\\vphantom{";
 249                 break;
 250         case hphantom:
 251                 os << "\\hphantom{";
 252                 break;
 253         case smash:
 254                 os << "\\smash{";
 255                 break;
 256         case mathclap:
 257                 os << "\\mathclap{";
 258                 break;
 259         case mathllap:
 260                 os << "\\mathllap{";
 261                 break;
 262         case mathrlap:
 263                 os << "\\mathrlap{";
 264                 break;
 265         }
 266         os << cell(0) << '}';
 267 }
 268
 269
 270 void InsetMathPhantom::normalize(NormalStream & os) const
 271 {
 272         switch (kind_) {
 273         case phantom:
 274                 os << "[phantom ";
 275                 break;
 276         case vphantom:
 277                 os << "[vphantom ";
 278                 break;
 279         case hphantom:
 280                 os << "[hphantom ";
 281                 break;
 282         case smash:
 283                 os << "[smash ";
 284                 break;
 285         case mathclap:
 286                 os << "[mathclap ";
 287                 break;
 288         case mathllap:
 289                 os << "[mathllap ";
 290                 break;
 291         case mathrlap:
 292                 os << "[mathrlap ";
 293                 break;
 294         }
 295         os << cell(0) << ']';
 296 }
 297
 298
 299 void InsetMathPhantom::infoize(odocstream & os) const
 300 {
 301         switch (kind_) {
 302         case phantom:
 303                 os << "Phantom";
 304                 break;
 305         case vphantom:
 306                 os << "Vphantom";
 307                 break;
 308         case hphantom:
 309                 os << "Hphantom";
 310                 break;
 311         case smash:
 312                 os << "Smash";
 313                 break;
 314         case mathllap:
 315                 os << "Mathllap";
 316                 break;
 317         case mathclap:
 318                 os << "Mathclap";
 319                 break;
 320         case mathrlap:
 321                 os << "Mathrlap";
 322                 break;
 323         }
 324 }
 325
 326
 327 void InsetMathPhantom::validate(LaTeXFeatures & features) const
 328 {
 329         InsetMathNest::validate(features);
 330         switch (kind_) {
 331         case phantom:
 332         case vphantom:
 333         case hphantom:
 334         case smash:
 335                 break;
 336         case mathclap:
 337         case mathllap:
 338         case mathrlap:
 339                 features.require("mathtools");
 340                 break;
 341         }
 342 }
 343
 344
 345 bool InsetMathPhantom::visibleContents() const
 346 {
 347         return kind_ == phantom || kind_ == vphantom || kind_ == vphantom;
 348 }
 349
 350
 351 } // namespace lyx