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