src/frontends/qt/GuiDelimiter.cpp

   1 /**
   2  * \file GuiDelimiter.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  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "GuiDelimiter.h"
  14
  15 #include "GuiApplication.h"
  16 #include "GuiFontLoader.h"
  17 #include "GuiView.h"
  18 #include "qt_helpers.h"
  19
  20 #include "FontEnums.h"
  21 #include "FontInfo.h"
  22 #include "FuncRequest.h"
  23
  24 #include "support/debug.h"
  25 #include "support/docstring.h"
  26 #include "support/gettext.h"
  27 #include "support/lstrings.h"
  28
  29 #include <QBitmap>
  30 #include <QPainter>
  31 #include <QPixmap>
  32 #include <QCheckBox>
  33 #include <QListWidgetItem>
  34 #include <QScrollBar>
  35
  36 #include <map>
  37 #include <string>
  38
  39 using namespace std;
  40
  41 namespace lyx {
  42 namespace frontend {
  43
  44 namespace {
  45
  46 static char const *  latex_delimiters[] = {
  47         "(", ")", "{", "}", "[", "]",
  48         "lceil", "rceil", "lfloor", "rfloor", "langle", "rangle",
  49         "llbracket", "rrbracket",
  50         "uparrow", "updownarrow", "Uparrow", "Updownarrow", "downarrow", "Downarrow",
  51         "|", "Vert", "/", "backslash", ""
  52 };
  53
  54
  55 static int const nr_latex_delimiters =
  56         sizeof(latex_delimiters) / sizeof(char const *);
  57
  58 static string const bigleft[]  = {"", "bigl", "Bigl", "biggl", "Biggl"};
  59
  60 static string const bigright[] = {"", "bigr", "Bigr", "biggr", "Biggr"};
  61
  62 static char const * const biggui[] = {
  63         N_("big[[delimiter size]]"),
  64         N_("Big[[delimiter size]]"),
  65         N_("bigg[[delimiter size]]"),
  66         N_("Bigg[[delimiter size]]"),
  67         ""
  68 };
  69
  70
  71 // FIXME: It might be better to fix the big delim LFUN to not require
  72 // additional '\' prefix.
  73 static docstring fix_name(string const & str, bool big)
  74 {
  75         if (str.empty())
  76                 return from_ascii(".");
  77         if (!big || str == "(" || str == ")" || str == "[" || str == "]"
  78             || str == "|" || str == "/")
  79                 return from_ascii(str);
  80
  81         return "\\" + from_ascii(str);
  82 }
  83
  84 struct MathSymbol {
  85         MathSymbol(char_type uc = '?', string icon = string())
  86                 : unicode(uc), icon(icon)
  87         {}
  88         char_type unicode;
  89         string icon;
  90 };
  91
  92
  93 QPixmap getSelectedPixmap(QPixmap pixmap, QSize const icon_size)
  94 {
  95         QPalette palette = QPalette();
  96         QColor text_color = (guiApp->isInDarkMode())
  97                         ? palette.color(QPalette::Active, QPalette::WindowText)
  98                         : Qt::black;
  99         QColor highlight_color = palette.color(QPalette::Active, QPalette::HighlightedText);
 100         QColor highlight_bg = palette.color(QPalette::Active, QPalette::Highlight);
 101
 102         // create a layer with black text turned to QPalette::HighlightedText
 103         QPixmap hl_overlay(pixmap.size());
 104         hl_overlay.fill(highlight_color);
 105         hl_overlay.setMask(pixmap.createMaskFromColor(text_color, Qt::MaskOutColor));
 106
 107         // Create highlighted background
 108         QPixmap hl_background(icon_size);
 109         hl_background.fill(highlight_bg);
 110
 111         // put layers on top of existing pixmap
 112         QPainter painter(&pixmap);
 113         painter.drawPixmap(pixmap.rect(), hl_background);
 114         painter.drawPixmap(pixmap.rect(), hl_overlay);
 115
 116         return pixmap;
 117 }
 118
 119 /// TeX-name / Math-symbol map.
 120 static map<std::string, MathSymbol> math_symbols_;
 121 /// Math-symbol / TeX-name map.
 122 /// This one is for fast search, it contains the same data as
 123 /// \c math_symbols_.
 124 static map<char_type, string> tex_names_;
 125
 126 typedef map<char_type, QListWidgetItem *> ListItems;
 127 ListItems left_list_items_;
 128 ListItems right_list_items_;
 129
 130 void initMathSymbols()
 131 {
 132         // FIXME: Ideally, those unicode codepoints would be defined
 133         // in "lib/symbols". Unfortunately, some of those are already
 134         // defined with non-unicode ids for use within mathed.
 135         // FIXME 2: We should fill-in this map with the parsed "symbols"
 136         // file done in MathFactory.cpp.
 137         math_symbols_["("] = MathSymbol('(', "lparen");
 138         math_symbols_[")"] = MathSymbol(')', "rparen");
 139         math_symbols_["{"] = MathSymbol('{', "lbrace");
 140         math_symbols_["}"] = MathSymbol('}', "rbrace");
 141         math_symbols_["["] = MathSymbol('[', "lbracket");
 142         math_symbols_["]"] = MathSymbol(']', "rbracket");
 143         math_symbols_["|"] = MathSymbol('|', "mid");
 144         math_symbols_["/"] = MathSymbol('/', "slash");
 145         math_symbols_["backslash"] = MathSymbol('\\', "backslash");
 146         math_symbols_["lceil"] = MathSymbol(0x2308, "lceil");
 147         math_symbols_["rceil"] = MathSymbol(0x2309, "rceil");
 148         math_symbols_["lfloor"] = MathSymbol(0x230A, "lfloor");
 149         math_symbols_["rfloor"] = MathSymbol(0x230B, "rfloor");
 150         math_symbols_["langle"] = MathSymbol(0x2329, "langle");
 151         math_symbols_["rangle"] = MathSymbol(0x232A, "rangle");
 152         math_symbols_["llbracket"] = MathSymbol(0x27e6, "llbracket");
 153         math_symbols_["rrbracket"] = MathSymbol(0x27e7, "rrbracket");
 154         math_symbols_["uparrow"] = MathSymbol(0x2191, "uparrow");
 155         math_symbols_["Uparrow"] = MathSymbol(0x21D1, "uparrow2");
 156         math_symbols_["updownarrow"] = MathSymbol(0x2195, "updownarrow");
 157         math_symbols_["Updownarrow"] = MathSymbol(0x21D5, "updownarrow2");
 158         math_symbols_["downarrow"] = MathSymbol(0x2193, "downarrow");
 159         math_symbols_["Downarrow"] = MathSymbol(0x21D3, "downarrow2");
 160         math_symbols_["downdownarrows"] = MathSymbol(0x21CA, "downdownarrows");
 161         math_symbols_["downharpoonleft"] = MathSymbol(0x21C3, "downharpoonleft");
 162         math_symbols_["downharpoonright"] = MathSymbol(0x21C2, "downharpoonright");
 163         math_symbols_["vert"] = MathSymbol(0x007C, "vert");
 164         math_symbols_["Vert"] = MathSymbol(0x2016, "vert2");
 165
 166         map<string, MathSymbol>::const_iterator it = math_symbols_.begin();
 167         map<string, MathSymbol>::const_iterator end = math_symbols_.end();
 168         for (; it != end; ++it)
 169                 tex_names_[it->second.unicode] = it->first;
 170 }
 171
 172 /// \return the math unicode symbol associated to a TeX name.
 173 MathSymbol const & mathSymbol(string const & tex_name)
 174 {
 175         map<string, MathSymbol>::const_iterator it =
 176                 math_symbols_.find(tex_name);
 177
 178         static MathSymbol const unknown_symbol;
 179         if (it == math_symbols_.end())
 180                 return unknown_symbol;
 181
 182         return it->second;
 183 }
 184
 185 /// \return the TeX name associated to a math unicode symbol.
 186 string const & texName(char_type math_symbol)
 187 {
 188         map<char_type, string>::const_iterator it =
 189                 tex_names_.find(math_symbol);
 190
 191         static string const empty_string;
 192         if (it == tex_names_.end())
 193                 return empty_string;
 194
 195         return it->second;
 196 }
 197
 198
 199 void setDelimiterName(QListWidgetItem * lwi, string const & name)
 200 {
 201         lwi->setData(Qt::UserRole, toqstr(name));
 202 }
 203
 204
 205 string getDelimiterName(QListWidgetItem const * lwi)
 206 {
 207         return fromqstr(lwi->data(Qt::UserRole).toString());
 208 }
 209
 210
 211 } // namespace
 212
 213
 214 GuiDelimiter::GuiDelimiter(GuiView & lv)
 215         : GuiDialog(lv, "mathdelimiter", qt_("Math Delimiter"))
 216 {
 217         setupUi(this);
 218
 219         connect(buttonBox, SIGNAL(rejected()), this, SLOT(accept()));
 220
 221         setFocusProxy(leftLW);
 222
 223         leftLW->setViewMode(QListView::IconMode);
 224         rightLW->setViewMode(QListView::IconMode);
 225
 226         leftLW->setDragDropMode(QAbstractItemView::NoDragDrop);
 227         rightLW->setDragDropMode(QAbstractItemView::NoDragDrop);
 228
 229         left_list_items_.clear();
 230         right_list_items_.clear();
 231
 232         initMathSymbols();
 233
 234         QSize icon_size(26, 26);
 235
 236         // we calculate the appropriate width to fit 4 icons in a row
 237         leftLW->setMinimumWidth((4 * (icon_size.width() + (2 * leftLW->spacing())))
 238                                 + (leftLW->frameWidth() * 2)
 239                                 + leftLW->verticalScrollBar()->height());
 240         rightLW->setMinimumWidth((4 * (icon_size.width() + (2 * rightLW->spacing())))
 241                                  + (rightLW->frameWidth() * 2)
 242                                  + rightLW->verticalScrollBar()->height());
 243         leftLW->setIconSize(icon_size);
 244         rightLW->setIconSize(icon_size);
 245
 246         // The last element is the empty one.
 247         int const end = nr_latex_delimiters - 1;
 248         for (int i = 0; i < end; ++i) {
 249                 string const delim = latex_delimiters[i];
 250                 MathSymbol const & ms = mathSymbol(delim);
 251                 // get pixmap with bullets
 252                 QPixmap pixmap = getPixmap("images/math/", toqstr(ms.icon), "svgz,png");
 253                 QIcon icon(pixmap);
 254                 icon.addPixmap(getSelectedPixmap(pixmap, icon_size), QIcon::Selected);
 255                 QListWidgetItem * lwi = new QListWidgetItem(icon, QString());
 256                 setDelimiterName(lwi, delim);
 257                 left_list_items_[ms.unicode] = lwi;
 258                 lwi->setToolTip(toqstr(delim));
 259                 lwi->setSizeHint(icon_size);
 260                 leftLW->addItem(lwi);
 261         }
 262
 263         for (int i = 0; i != leftLW->count(); ++i) {
 264                 MathSymbol const & ms = mathSymbol(getDelimiterName(leftLW->item(i)));
 265                 QListWidgetItem * rwi = left_list_items_[doMatch(ms.unicode)]->clone();
 266                 right_list_items_[ms.unicode] = rwi;
 267                 rightLW->addItem(rwi);
 268         }
 269
 270         // The last element is the empty one.
 271         QListWidgetItem * lwi = new QListWidgetItem(qt_("(None)"));
 272         lwi->setToolTip(qt_("No Delimiter"));
 273         left_list_items_['?'] = lwi;
 274         QListWidgetItem * rwi = new QListWidgetItem(qt_("(None)"));
 275         rwi->setToolTip(qt_("No Delimiter"));
 276         right_list_items_['?'] = rwi;
 277         leftLW->addItem(lwi);
 278         rightLW->addItem(rwi);
 279
 280         sizeCO->addItem(qt_("Variable"));
 281
 282         for (int i = 0; *biggui[i]; ++i)
 283                 sizeCO->addItem(qt_(biggui[i]));
 284
 285         on_leftLW_currentRowChanged(0);
 286         // synchronise the scroll bars
 287         on_matchCB_stateChanged(matchCB->checkState());
 288         bc().setPolicy(ButtonPolicy::IgnorantPolicy);
 289 }
 290
 291
 292 char_type GuiDelimiter::doMatch(char_type const symbol)
 293 {
 294         string const & str = texName(symbol);
 295         string match;
 296         if (str == "(")
 297                 match = ")";
 298         else if (str == ")")
 299                 match = "(";
 300         else if (str == "[")
 301                 match = "]";
 302         else if (str == "]")
 303                 match = "[";
 304         else if (str == "{")
 305                 match = "}";
 306         else if (str == "}")
 307                 match = "{";
 308         else if (str == "l")
 309                 match = "r";
 310         else if (str == "rceil")
 311                 match = "lceil";
 312         else if (str == "lceil")
 313                 match = "rceil";
 314         else if (str == "rfloor")
 315                 match = "lfloor";
 316         else if (str == "lfloor")
 317                 match = "rfloor";
 318         else if (str == "rangle")
 319                 match = "langle";
 320         else if (str == "langle")
 321                 match = "rangle";
 322         else if (str == "llbracket")
 323                 match = "rrbracket";
 324         else if (str == "rrbracket")
 325                 match = "llbracket";
 326         else if (str == "backslash")
 327                 match = "/";
 328         else if (str == "/")
 329                 match = "backslash";
 330         else
 331                 return symbol;
 332
 333         return mathSymbol(match).unicode;
 334 }
 335
 336
 337 void GuiDelimiter::updateTeXCode(int size)
 338 {
 339         bool const bigsize = size != 0;
 340
 341         docstring left_str = fix_name(getDelimiterName(leftLW->currentItem()),
 342                                       bigsize);
 343         docstring right_str = fix_name(getDelimiterName(rightLW->currentItem()),
 344                                        bigsize);
 345
 346         if (!bigsize)
 347                 tex_code_ = left_str + ' ' + right_str;
 348         else {
 349                 tex_code_ = from_ascii(bigleft[size]) + ' '
 350                         + left_str + ' '
 351                         + from_ascii(bigright[size]) + ' '
 352                         + right_str;
 353         }
 354
 355         // Generate TeX-code for GUI display.
 356         // FIXME: Instead of reconstructing the TeX code it would be nice to
 357         // FIXME: retrieve the LateX code directly from mathed.
 358         // In all cases, we want the '\' prefix if needed, so we pass 'true'
 359         // to fix_name.
 360         left_str = fix_name(getDelimiterName(leftLW->currentItem()),
 361                             true);
 362         right_str = fix_name(getDelimiterName(rightLW->currentItem()),
 363                              true);
 364         docstring code_str;
 365         if (!bigsize)
 366                 code_str = "\\left" + left_str + " \\right" + right_str;
 367         else {
 368                 // There should be nothing in the TeX-code when the delimiter is "None".
 369                 if (left_str != ".")
 370                         code_str = "\\" + from_ascii(bigleft[size]) + left_str + ' ';
 371                 if (right_str != ".")
 372                         code_str += "\\" + from_ascii(bigright[size]) + right_str;
 373         }
 374
 375         texCodeL->setText(qt_("TeX Code: ") + toqstr(code_str));
 376
 377         // Enable the Swap button with non-matched pairs
 378         bool const allow_swap =
 379                 (doMatch(mathSymbol(getDelimiterName(leftLW->currentItem())).unicode)
 380                  != mathSymbol(getDelimiterName(rightLW->currentItem())).unicode);
 381         swapPB->setEnabled(allow_swap);
 382 }
 383
 384
 385 void  GuiDelimiter::on_buttonBox_clicked(QAbstractButton * button)
 386 {
 387         switch (buttonBox->standardButton(button)) {
 388         case QDialogButtonBox::Apply:
 389                 insert();
 390                 break;
 391         case QDialogButtonBox::Ok:
 392                 insert();
 393         // fall through
 394         case QDialogButtonBox::Cancel:
 395                 accept();
 396                 break;
 397         default:
 398                 break;
 399         }
 400 }
 401
 402
 403 void GuiDelimiter::insert()
 404 {
 405         if (sizeCO->currentIndex() == 0)
 406                 dispatch(FuncRequest(LFUN_MATH_DELIM, tex_code_));
 407         else {
 408                 docstring command = '"' + tex_code_ + '"';
 409                 command = support::subst(command, from_ascii(" "), from_ascii("\" \""));
 410                 dispatch(FuncRequest(LFUN_MATH_BIGDELIM, command));
 411         }
 412         buttonBox->button(QDialogButtonBox::Cancel)->setText(qt_("Close"));
 413 }
 414
 415
 416 void GuiDelimiter::on_sizeCO_activated(int index)
 417 {
 418         updateTeXCode(index);
 419 }
 420
 421
 422 void GuiDelimiter::on_leftLW_itemActivated(QListWidgetItem *)
 423 {
 424         // do not auto-apply if !matchCB->isChecked()
 425         if (!matchCB->isChecked())
 426                 return;
 427         insert();
 428         accept();
 429 }
 430
 431
 432 void GuiDelimiter::on_rightLW_itemActivated(QListWidgetItem *)
 433 {
 434         // do not auto-apply if !matchCB->isChecked()
 435         if (!matchCB->isChecked())
 436                 return;
 437         insert();
 438         accept();
 439 }
 440
 441
 442 void GuiDelimiter::on_leftLW_currentRowChanged(int item)
 443 {
 444         if (matchCB->isChecked())
 445                 rightLW->setCurrentRow(item);
 446
 447         updateTeXCode(sizeCO->currentIndex());
 448 }
 449
 450
 451 void GuiDelimiter::on_rightLW_currentRowChanged(int item)
 452 {
 453         if (matchCB->isChecked())
 454                 leftLW->setCurrentRow(item);
 455
 456         updateTeXCode(sizeCO->currentIndex());
 457 }
 458
 459
 460 void GuiDelimiter::on_matchCB_stateChanged(int state)
 461 {
 462         // Synchronise the vertical scroll bars when checked
 463         QScrollBar * ls = leftLW->verticalScrollBar();
 464         QScrollBar * rs = rightLW->verticalScrollBar();
 465
 466         if (state == Qt::Checked) {
 467                 on_leftLW_currentRowChanged(leftLW->currentRow());
 468
 469                 connect(ls, SIGNAL(valueChanged(int)), rs, SLOT(setValue(int)),
 470                         Qt::UniqueConnection);
 471                 connect(rs, SIGNAL(valueChanged(int)), ls, SLOT(setValue(int)),
 472                         Qt::UniqueConnection);
 473                 rs->setValue(ls->value());
 474         } else {
 475                 ls->disconnect(rs);
 476                 rs->disconnect(ls);
 477         }
 478
 479         updateTeXCode(sizeCO->currentIndex());
 480 }
 481
 482 void GuiDelimiter::on_swapPB_clicked()
 483 {
 484         // Get current math symbol for each side.
 485         MathSymbol const & lms =
 486                 mathSymbol(getDelimiterName(leftLW->currentItem()));
 487         MathSymbol const & rms =
 488                 mathSymbol(getDelimiterName(rightLW->currentItem()));
 489
 490         // Swap and match.
 491         char_type const lc = doMatch(rms.unicode);
 492         char_type const rc = doMatch(lms.unicode);
 493
 494         // Convert back to QString to locate them in the widget.
 495         MathSymbol const & nlms = mathSymbol(texName(lc));
 496         MathSymbol const & nrms = mathSymbol(texName(rc));
 497
 498         // Locate matching QListWidgetItem.
 499         QListWidgetItem * lwi = left_list_items_[nlms.unicode];
 500         QListWidgetItem * rwi = right_list_items_[nrms.unicode];
 501
 502         // Select.
 503         leftLW->setCurrentItem(lwi);
 504         rightLW->setCurrentItem(rwi);
 505
 506         updateTeXCode(sizeCO->currentIndex());
 507 }
 508
 509
 510 } // namespace frontend
 511 } // namespace lyx
 512
 513 #include "moc_GuiDelimiter.cpp"