src/frontends/qt4/GuiApplication.cpp

   1 /**
   2  * \file qt4/GuiApplication.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author unknown
   7  * \author John Levon
   8  * \author Abdelrazak Younes
   9  *
  10  * Full author contact details are available in file CREDITS.
  11  */
  12
  13 #include <config.h>
  14
  15 #include "GuiApplication.h"
  16
  17 #include "qt_helpers.h"
  18 #include "QLImage.h"
  19 #include "socket_callback.h"
  20
  21 #include "frontends/LyXView.h"
  22
  23 #include "graphics/LoaderQueue.h"
  24
  25 #include "support/FileName.h"
  26 #include "support/lstrings.h"
  27 #include "support/os.h"
  28 #include "support/Package.h"
  29
  30 #include "BufferView.h"
  31 #include "Color.h"
  32 #include "debug.h"
  33 #include "FuncRequest.h"
  34 #include "gettext.h"
  35 #include "LyX.h"
  36 #include "LyXFunc.h"
  37 #include "LyXRC.h"
  38
  39 #include <QApplication>
  40 #include <QClipboard>
  41 #include <QEventLoop>
  42 #include <QFileOpenEvent>
  43 #include <QLocale>
  44 #include <QLibraryInfo>
  45 #include <QTextCodec>
  46 #include <QTimer>
  47 #include <QTranslator>
  48 #include <QWidget>
  49
  50 #ifdef Q_WS_X11
  51 #include <X11/Xatom.h>
  52 #include <X11/Xlib.h>
  53 #endif
  54
  55 #include <boost/bind.hpp>
  56
  57 #include <exception>
  58
  59 using std::string;
  60 using std::endl;
  61
  62 ///////////////////////////////////////////////////////////////
  63 // You can find other X11 specific stuff
  64 // at the end of this file...
  65 ///////////////////////////////////////////////////////////////
  66
  67 namespace {
  68
  69 int getDPI()
  70 {
  71         QWidget w;
  72         return int(0.5 * (w.logicalDpiX() + w.logicalDpiY()));
  73 }
  74
  75 } // namespace anon
  76
  77
  78 namespace lyx {
  79
  80 using support::FileName;
  81
  82 frontend::Application * createApplication(int & argc, char * argv[])
  83 {
  84         return new frontend::GuiApplication(argc, argv);
  85 }
  86
  87
  88 namespace frontend {
  89
  90 GuiApplication * guiApp;
  91
  92
  93 GuiApplication::~GuiApplication()
  94 {
  95         socket_callbacks_.clear();
  96 }
  97
  98
  99 GuiApplication::GuiApplication(int & argc, char ** argv)
 100         : QApplication(argc, argv), Application(argc, argv)
 101 {
 102         // Qt bug? setQuitOnLastWindowClosed(true); does not work
 103         setQuitOnLastWindowClosed(false);
 104
 105 #ifdef Q_WS_X11
 106         // doubleClickInterval() is 400 ms on X11 which is just too long.
 107         // On Windows and Mac OS X, the operating system's value is used.
 108         // On Microsoft Windows, calling this function sets the double
 109         // click interval for all applications. So we don't!
 110         QApplication::setDoubleClickInterval(300);
 111 #endif
 112
 113         // install translation file for Qt built-in dialogs
 114         QString language_name = QString("qt_") + QLocale::system().name();
 115
 116         // language_name can be short (e.g. qt_zh) or long (e.g. qt_zh_CN).
 117         // Short-named translator can be loaded from a long name, but not the
 118         // opposite. Therefore, long name should be used without truncation.
 119         // c.f. http://doc.trolltech.com/4.1/qtranslator.html#load
 120         if (qt_trans_.load(language_name,
 121                 QLibraryInfo::location(QLibraryInfo::TranslationsPath)))
 122         {
 123                 installTranslator(&qt_trans_);
 124                 // even if the language calls for RtL, don't do that
 125                 setLayoutDirection(Qt::LeftToRight);
 126                 LYXERR(Debug::GUI)
 127                         << "Successfully installed Qt translations for locale "
 128                         << fromqstr(language_name) << std::endl;
 129         } else
 130                 LYXERR(Debug::GUI)
 131                         << "Could not find  Qt translations for locale "
 132                         << fromqstr(language_name) << std::endl;
 133
 134 #ifdef Q_WS_MACX
 135         // This allows to translate the strings that appear in the LyX menu.
 136         addMenuTranslator();
 137 #endif
 138
 139         using namespace lyx::graphics;
 140
 141         Image::newImage = boost::bind(&QLImage::newImage);
 142         Image::loadableFormats = boost::bind(&QLImage::loadableFormats);
 143
 144         // needs to be done before reading lyxrc
 145         lyxrc.dpi = getDPI();
 146
 147         LoaderQueue::setPriority(10,100);
 148
 149         guiApp = this;
 150 }
 151
 152
 153 Clipboard& GuiApplication::clipboard()
 154 {
 155         return clipboard_;
 156 }
 157
 158
 159 Selection& GuiApplication::selection()
 160 {
 161         return selection_;
 162 }
 163
 164
 165 int const GuiApplication::exec()
 166 {
 167         QTimer::singleShot(1, this, SLOT(execBatchCommands()));
 168         return QApplication::exec();
 169 }
 170
 171
 172 void GuiApplication::exit(int status)
 173 {
 174         QApplication::exit(status);
 175 }
 176
 177
 178 void GuiApplication::execBatchCommands()
 179 {
 180         LyX::ref().execBatchCommands();
 181 }
 182
 183
 184 string const GuiApplication::romanFontName()
 185 {
 186         QFont font;
 187         font.setKerning(false);
 188         font.setStyleHint(QFont::Serif);
 189         font.setFamily("serif");
 190
 191         return fromqstr(QFontInfo(font).family());
 192 }
 193
 194
 195 string const GuiApplication::sansFontName()
 196 {
 197         QFont font;
 198         font.setKerning(false);
 199         font.setStyleHint(QFont::SansSerif);
 200         font.setFamily("sans");
 201
 202         return fromqstr(QFontInfo(font).family());
 203 }
 204
 205
 206 string const GuiApplication::typewriterFontName()
 207 {
 208         QFont font;
 209         font.setKerning(false);
 210         font.setStyleHint(QFont::TypeWriter);
 211         font.setFamily("monospace");
 212
 213         return fromqstr(QFontInfo(font).family());
 214 }
 215
 216
 217 bool GuiApplication::event(QEvent * e)
 218 {
 219         switch(e->type()) {
 220         case QEvent::FileOpen: {
 221                 // Open a file; this happens only on Mac OS X for now
 222                 QFileOpenEvent * foe = static_cast<QFileOpenEvent *>(e);
 223
 224                 if (!currentView() || !currentView()->view())
 225                         // The application is not properly initialized yet.
 226                         // So we acknowledge the event and delay the file opening
 227                         // until LyX is ready.
 228                         // FIXME UNICODE: FileName accept an utf8 encoded string.
 229                         LyX::ref().addFileToLoad(FileName(fromqstr(foe->file())));
 230                 else
 231                         lyx::dispatch(FuncRequest(LFUN_FILE_OPEN,
 232                                 qstring_to_ucs4(foe->file())));
 233
 234                 e->accept();
 235                 return true;
 236         }
 237         default:
 238                 return QApplication::event(e);
 239         }
 240 }
 241
 242
 243 bool GuiApplication::notify(QObject * receiver, QEvent * event)
 244 {
 245         bool return_value;
 246         try {
 247                 return_value = QApplication::notify(receiver, event);
 248         }
 249         catch (std::exception  const & e) {
 250                 lyxerr << "Caught \"normal\" exception: " << e.what() << endl;
 251                 LyX::cref().emergencyCleanup();
 252                 abort();
 253         }
 254         catch (...) {
 255                 lyxerr << "Caught some really weird exception..." << endl;
 256                 LyX::cref().emergencyCleanup();
 257                 abort();
 258         }
 259
 260         return return_value;
 261 }
 262
 263
 264 void GuiApplication::syncEvents()
 265 {
 266         // This is the ONLY place where processEvents may be called.
 267         // During screen update/ redraw, this method is disabled to
 268         // prevent keyboard events being handed to the LyX core, where
 269         // they could cause re-entrant calls to screen update.
 270         processEvents(QEventLoop::ExcludeUserInputEvents);
 271 }
 272
 273
 274 bool GuiApplication::getRgbColor(Color_color col,
 275         RGBColor & rgbcol)
 276 {
 277         QColor const & qcol = color_cache_.get(col);
 278         if (!qcol.isValid()) {
 279                 rgbcol.r = 0;
 280                 rgbcol.g = 0;
 281                 rgbcol.b = 0;
 282                 return false;
 283         }
 284         rgbcol.r = qcol.red();
 285         rgbcol.g = qcol.green();
 286         rgbcol.b = qcol.blue();
 287         return true;
 288 }
 289
 290
 291 string const GuiApplication::hexName(Color_color col)
 292 {
 293         return lyx::support::ltrim(fromqstr(color_cache_.get(col).name()), "#");
 294 }
 295
 296
 297 void GuiApplication::updateColor(Color_color)
 298 {
 299         // FIXME: Bleh, can't we just clear them all at once ?
 300         color_cache_.clear();
 301 }
 302
 303
 304 void GuiApplication::registerSocketCallback(int fd, boost::function<void()> func)
 305 {
 306         socket_callbacks_[fd] =
 307                 boost::shared_ptr<socket_callback>(new socket_callback(fd, func));
 308 }
 309
 310
 311 void GuiApplication::unregisterSocketCallback(int fd)
 312 {
 313         socket_callbacks_.erase(fd);
 314 }
 315
 316 ////////////////////////////////////////////////////////////////////////
 317 // X11 specific stuff goes here...
 318 #ifdef Q_WS_X11
 319 bool GuiApplication::x11EventFilter(XEvent * xev)
 320 {
 321         if (!currentView())
 322                 return false;
 323
 324         switch (xev->type) {
 325         case SelectionRequest: {
 326                 if (xev->xselectionrequest.selection != XA_PRIMARY)
 327                         break;
 328                 LYXERR(Debug::GUI) << "X requested selection." << endl;
 329                 BufferView * bv = currentView()->view();
 330                 if (bv) {
 331                         docstring const sel = bv->requestSelection();
 332                         if (!sel.empty())
 333                                 selection_.put(sel);
 334                 }
 335                 break;
 336         }
 337         case SelectionClear: {
 338                 if (xev->xselectionclear.selection != XA_PRIMARY)
 339                         break;
 340                 LYXERR(Debug::GUI) << "Lost selection." << endl;
 341                 BufferView * bv = currentView()->view();
 342                 if (bv)
 343                         bv->clearSelection();
 344                 break;
 345         }
 346         }
 347         return false;
 348 }
 349 #endif
 350
 351
 352 ////////////////////////////////////////////////////////////////////////
 353 // Mac specific stuff goes here...
 354
 355 class MenuTranslator : public QTranslator {
 356 public:
 357         virtual ~MenuTranslator() {};
 358         virtual QString translate(const char * context,
 359                                   const char * sourceText,
 360                                   const char * comment = 0) const;
 361 };
 362
 363
 364 QString MenuTranslator::translate(const char * /*context*/,
 365                                   const char * sourceText,
 366                                   const char *) const
 367 {
 368         string const s = sourceText;
 369         if (s == N_("About %1") || s == N_("Preferences")
 370             || s == N_("Reconfigure") || s == N_("Quit %1"))
 371                 return qt_(s);
 372         else
 373                 return QString();
 374 }
 375
 376
 377 void GuiApplication::addMenuTranslator()
 378 {
 379         menu_trans_.reset(new MenuTranslator());
 380         installTranslator(menu_trans_.get());
 381 }
 382
 383
 384 } // namespace frontend
 385 } // namespace lyx
 386
 387 #include "GuiApplication_moc.cpp"