okular/dviwin.cpp

//
// Class: dviWindow
//
// Previewer for TeX DVI files.
//

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <setjmp.h>

#include <qbitmap.h> 
#include <qfileinfo.h>
#include <qimage.h>
#include <qkeycode.h>
#include <qlabel.h>
#include <qpaintdevice.h>
#include <qpainter.h>
#include <qurl.h>

#include <kapp.h>
#include <kmessagebox.h>
#include <kmimemagic.h>
#include <kdebug.h>
#include <kfiledialog.h>
#include <kio/job.h>
#include <klocale.h>
#include <kprinter.h>
#include <kprocess.h>

#include "dviwin.h"
#include "fontpool.h"
#include "fontprogress.h"
#include "infodialog.h"
#include "optiondialog.h"


//------ some definitions from xdvi ----------


#include <X11/Xlib.h>
#include <X11/Intrinsic.h>

#define	MAXDIM		32767
#define    DVI_BUFFER_LEN  512     
struct WindowRec mane	= {(Window) 0, 3, 0, 0, 0, 0, MAXDIM, 0, MAXDIM, 0};
struct WindowRec currwin = {(Window) 0, 3, 0, 0, 0, 0, MAXDIM, 0, MAXDIM, 0};
extern	struct WindowRec alt;
extern unsigned char       dvi_buffer[DVI_BUFFER_LEN];  
struct drawinf	currinf;


const char *dvi_oops_msg;	/* error message */
extern struct frame        frame0; /* dummy head of list */  

jmp_buf	dvi_env;	/* mechanism to communicate dvi file errors */


QIntDict<font> tn_table;


int	_pixels_per_inch; //@@@




// The following are really used
unsigned int	page_w;
unsigned int	page_h;
// end of "really used"

extern unsigned int	page_w, page_h;
Window                  mainwin;

void 	draw_page(void);

#include <setjmp.h>
extern	jmp_buf	dvi_env;	/* mechanism to communicate dvi file errors */
QPainter foreGroundPaint; // QPainter used for text


//------ now comes the dviWindow class implementation ----------

dviWindow::dviWindow(double zoom, int mkpk, QWidget *parent, const char *name ) 
  : QWidget( parent, name )
{
#ifdef DEBUG_DVIWIN
  kdDebug(4300) << "dviWindow" << endl;
#endif

  setBackgroundMode(NoBackground);

  setFocusPolicy(QWidget::StrongFocus);
  setFocus();
  
  // initialize the dvi machinery
  dviFile                = 0;

  font_pool              = new fontPool();
  if (font_pool == NULL) {
    kdError(4300) << "Could not allocate memory for the font pool." << endl;
    exit(-1);
  }
  connect(font_pool, SIGNAL( setStatusBarText( const QString& ) ), this, SIGNAL( setStatusBarText( const QString& ) ) );
  connect(font_pool, SIGNAL(fonts_have_been_loaded()), this, SLOT(drawPage()));

  info                   = new infoDialog(this);
  if (info == 0) {
    // The info dialog is not vital. Therefore we don't abort if
    // something goes wrong here.
    kdError(4300) << "Could not allocate memory for the info dialog." << endl;
  } else {
    qApp->connect(font_pool, SIGNAL(MFOutput(QString)), info, SLOT(outputReceiver(QString)));
    qApp->connect(font_pool, SIGNAL(fonts_info(class fontPool *)), info, SLOT(setFontInfo(class fontPool *)));
    qApp->connect(font_pool, SIGNAL(new_kpsewhich_run(QString)), info, SLOT(clear(QString)));
  }


  setMakePK( mkpk );
  editorCommand         = "";
  setMetafontMode( DefaultMFMode ); // that also sets the basedpi
  paper_width           = 21.0; // set A4 paper as default
  paper_height          = 27.9;
  unshrunk_page_w       = int( 21.0 * basedpi/2.54 + 0.5 );
  unshrunk_page_h       = int( 27.9 * basedpi/2.54 + 0.5 ); 
  PostScriptOutPutString = NULL;
  HTML_href              = NULL;
  mainwin                = handle();
  mane                   = currwin;
  _postscript            = 0;
  pixmap                 = 0;

  // Storage used for dvips and friends, i.e. for the "export" functions.
  proc                   = 0;
  progress               = 0;
  export_printer         = 0;
  export_fileName        = "";

  // Calculate the horizontal resolution of the display device.  @@@
  // We assume implicitly that the horizontal and vertical resolutions
  // agree. This is probably not a safe assumption.
  Display *DISP          = x11Display();
  xres                   = ((double)(DisplayWidth(DISP,(int)DefaultScreen(DISP)) *25.4) /
			    DisplayWidthMM(DISP,(int)DefaultScreen(DISP)) );
  // Just to make sure that we are never dividing by zero.
  if ((xres < 10)||(xres > 1000))
    xres = 75.0;

  // In principle, this method should never be called with illegal
  // values for zoom. In principle.
  if (zoom < KViewPart::minZoom/1000.0)
    zoom = KViewPart::minZoom/1000.0;
  if (zoom > KViewPart::maxZoom/1000.0)
    zoom = KViewPart::maxZoom/1000.0;
  mane.shrinkfactor      = currwin.shrinkfactor = (double)basedpi/(xres*zoom);
  _zoom                  = zoom;

  PS_interface           = new ghostscript_interface(0.0, 0, 0);
  // pass status bar messages through 
  connect(PS_interface, SIGNAL( setStatusBarText( const QString& ) ), this, SIGNAL( setStatusBarText( const QString& ) ) );
  is_current_page_drawn  = 0;  

  // Variables used in animation.
  animationCounter = 0;
  timerIdent       = 0;
  
  resize(0,0);
}

dviWindow::~dviWindow()
{
#ifdef DEBUG_DVIWIN
  kdDebug(4300) << "~dviWindow" << endl;
#endif

  if (info)
    delete info;

  delete PS_interface;

  if (dviFile)
    delete dviFile;

  // Don't delete the export printer. This is owned by the
  // kdvi_multipage.
  export_printer = 0;
}

void dviWindow::showInfo(void)
{
  if (info == 0) 
    return;

  info->setDVIData(dviFile);
  // Call check_if_fonts_are_loaded() to make sure that the fonts_info
  // is emitted. That way, the infoDialog will know about the fonts
  // and their status.
  font_pool->check_if_fonts_are_loaded();
  info->show();
}


void dviWindow::exportPDF(void)
{
  // Should not happen since the progressDialog is modal... but who
  // knows?
  if (proc != 0) {
    KMessageBox::sorry(0, i18n("Another export command is currently running"));
    return;
  }

  // That sould also not happen.
  if (dviFile == NULL)
    return;

  // Is the dvipdfm-Programm available ??
  QStringList texList = QStringList::split(":", QString::fromLocal8Bit(getenv("PATH")));
  bool found = false;
  for (QStringList::Iterator it=texList.begin(); it!=texList.end(); ++it) {
    QString temp = (*it) + "/" + "dvipdfm";
    if (QFile::exists(temp)) {
      found = true;
      break;
    }
  }
  if (found == false) {
    KMessageBox::sorry(0, i18n("KDVI could not locate the program 'dvipdfm' on your computer. That program is\n"
			       "absolutely needed by the export function. You can, however, convert\n"
			       "the DVI-file to PDF using the print function of KDVI, but that will often\n"
			       "produce which print ok, but are of inferior quality if viewed in the \n"
			       "Acrobat Reader. It may be wise to upgrade to a more recent version of your\n"
			       "TeX distribution which includes the 'dvipdfm' program.\n\n"
			       "Hint to the perplexed system administrator: KDVI uses the shell's PATH variable\n"
			       "when looking for programs."));
    return;
  }

  QString fileName = KFileDialog::getSaveFileName(QString::null, "*.pdf|Portable Document Format (*.pdf)", this, i18n("Export File As"));
  if (fileName.isEmpty())
    return;
  QFileInfo finfo(fileName);
  if (finfo.exists()) {
    int r = KMessageBox::warningYesNo (this, QString(i18n("The file %1\nexists. Shall I overwrite that file?")).arg(fileName), 
				       i18n("Overwrite file"));
    if (r == KMessageBox::No)
      return;
  }
  
  // Initialize the progress dialog
  progress = new fontProgressDialog( QString::null, 
				     i18n("Using dvipdfm to export the file to PDF"), 
				     QString::null, 
				     i18n("KDVI is currently using the external program 'dvipdfm' to "
					  "convert your DVI-file to PDF. Sometimes that can take "
					  "a while because dvipdfm needs to generate its own bitmap fonts "
					  "Please be patient."),
				     i18n("Waiting for dvipdfm to finish..."),
				     this, "dvipdfm progress dialog", false );
  if (progress != 0) {
    progress->TextLabel2->setText( i18n("Please be patient") );
    progress->setTotalSteps( dviFile->total_pages );
    qApp->connect(progress, SIGNAL(finished(void)), this, SLOT(abortExternalProgramm(void)));
  }

  proc = new KShellProcess();
  if (proc == 0) {
    kdError(4300) << "Could not allocate ShellProcess for the dvipdfm command." << endl;
    return;
  }
  
  qApp->connect(proc, SIGNAL(receivedStderr(KProcess *, char *, int)), this, SLOT(dvips_output_receiver(KProcess *, char *, int)));
  qApp->connect(proc, SIGNAL(receivedStdout(KProcess *, char *, int)), this, SLOT(dvips_output_receiver(KProcess *, char *, int)));
  qApp->connect(proc, SIGNAL(processExited(KProcess *)), this, SLOT(dvips_terminated(KProcess *)));

  if (info)
    info->clear(QString(i18n("Export: %1 to PDF")).arg(KShellProcess::quote(dviFile->filename)));

  proc->clearArguments();
  finfo.setFile(dviFile->filename);
  *proc << QString("cd %1; dvipdfm").arg(KShellProcess::quote(finfo.dirPath(true)));
  *proc << QString("-o %1").arg(KShellProcess::quote(fileName));
  *proc << KShellProcess::quote(dviFile->filename);
  proc->closeStdin();
  if (proc->start(KProcess::NotifyOnExit, KProcess::AllOutput) == false) {
    kdError(4300) << "dvipdfm failed to start" << endl;
    return;
  }
  return;
}


void dviWindow::exportPS(QString fname, QString options, KPrinter *printer)
{
  // Should not happen since the progressDialog is modal... but who
  // knows?
  if (proc != 0) {
    KMessageBox::sorry(0, i18n("Another export command is currently running"));
    return;
  }

  // That sould also not happen.
  if (dviFile == NULL)
    return;

  QString fileName;
  if (fname.isEmpty()) {
    fileName = KFileDialog::getSaveFileName(QString::null, "*.ps|PostScript (*.ps)", this, i18n("Export File As"));
    if (fileName.isEmpty())
      return;
    QFileInfo finfo(fileName);
    if (finfo.exists()) {
      int r = KMessageBox::warningYesNo (this, QString(i18n("The file %1\nexists. Shall I overwrite that file?")).arg(fileName), 
					 i18n("Overwrite file"));
      if (r == KMessageBox::No)
	return;
    }
  } else
    fileName = fname;
  export_fileName = fileName;
  export_printer  = printer;

  // Initialize the progress dialog
  progress = new fontProgressDialog( QString::null, 
				     i18n("Using dvips to export the file to PostScript"), 
				     QString::null, 
				     i18n("KDVI is currently using the external program 'dvips' to "
					  "convert your DVI-file to PostScript. Sometimes that can take "
					  "a while because dvips needs to generate its own bitmap fonts "
					  "Please be patient."),
				     i18n("Waiting for dvips to finish..."),
				     this, "dvips progress dialog", false );
  if (progress != 0) {
    progress->TextLabel2->setText( i18n("Please be patient") );
    progress->setTotalSteps( dviFile->total_pages );
    qApp->connect(progress, SIGNAL(finished(void)), this, SLOT(abortExternalProgramm(void)));
  }

  proc = new KShellProcess();
  if (proc == 0) {
    kdError(4300) << "Could not allocate ShellProcess for the dvips command." << endl;
    return;
  }
  
  qApp->connect(proc, SIGNAL(receivedStderr(KProcess *, char *, int)),
		this, SLOT(dvips_output_receiver(KProcess *, char *, int)));
  qApp->connect(proc, SIGNAL(processExited(KProcess *)),
		this, SLOT(dvips_terminated(KProcess *)));

  if (info)
    info->clear(QString(i18n("Export: %1 to PostScript")).arg(KShellProcess::quote(dviFile->filename)));

  proc->clearArguments();
  QFileInfo finfo(dviFile->filename);
  *proc << QString("cd %1; dvips").arg(KShellProcess::quote(finfo.dirPath(true)));
  if (printer == 0)
    *proc << "-z"; // export Hyperlinks
  if (options.isEmpty() == false)
    *proc << options;
  *proc << QString("%1").arg(KShellProcess::quote(dviFile->filename));
  *proc << QString("-o %1").arg(KShellProcess::quote(fileName));
  proc->closeStdin();
  if (proc->start(KProcess::NotifyOnExit, KProcess::Stderr) == false) {
    kdError(4300) << "dvips failed to start" << endl;
    return;
  }
  return;
}


void dviWindow::abortExternalProgramm(void)
{
  if (proc != 0) {
    delete proc; // Deleting the KProcess kills the child.
    proc = 0;
  }

  if (progress != 0) {
    progress->hideDialog();
    delete progress;
    progress = 0;
  }

  export_printer  = 0;
  export_fileName = "";
}

void dviWindow::dvips_output_receiver(KProcess *, char *buffer, int buflen)
{
  // Paranoia.
  if (buflen < 0)
    return;
  QString op = QString::fromLocal8Bit(buffer, buflen);

  if (info != 0)
    info->outputReceiver(op);
  if (progress != 0)
    progress->show();
}

void dviWindow::dvips_terminated(KProcess *)
{
  if ((proc->normalExit() == true) && (proc->exitStatus() != 0)) 
    KMessageBox::error( this,
			i18n("An external program (e.g. an editor used for inverse search, or a program like "
			     "dvips or dvipdfm which is used by the export functions) reported an error. You "
			     "might wish to look at the <strong>document info dialog</strong> which you will "
			     "find in the File-Menu for a precise error report.") );

  // If a printer is defined, print and delete the output file.
  if (export_printer != 0)
    export_printer->printFiles( QStringList(export_fileName), true );

  // Kill and delete the remaining process, reset the printer, etc.
  abortExternalProgramm();
}


void dviWindow::setShowPS( int flag )
{
#ifdef DEBUG_DVIWIN
  kdDebug(4300) << "setShowPS" << endl;
#endif

  if ( _postscript == flag )
    return;
  _postscript = flag;
  drawPage();
}

void dviWindow::setShowHyperLinks( int flag )
{
  if ( _showHyperLinks == flag )
    return;
  _showHyperLinks = flag;

  drawPage();
}

void dviWindow::setMakePK( int flag )
{
  makepk = flag;
  font_pool->setMakePK(makepk);
}

void dviWindow::setMetafontMode( unsigned int mode )
{
  if ((dviFile != NULL) && (mode != font_pool->getMetafontMode()))
    KMessageBox::sorry( this,
			i18n("The change in Metafont mode will be effective\n"
			     "only after you start kdvi again!") );
  
  MetafontMode     = font_pool->setMetafontMode(mode);
  basedpi          = MFResolutions[MetafontMode];
  _pixels_per_inch = MFResolutions[MetafontMode];  //@@@
#ifdef DEBUG_DVIWIN
  kdDebug(4300) << "basedpi " << basedpi << endl;
#endif
}


void dviWindow::setPaper(double w, double h)
{
#ifdef DEBUG_DVIWIN
  kdDebug(4300) << "setPaper" << endl;
#endif

  paper_width      = w;
  paper_height     = h;
  unshrunk_page_w  = int( w * basedpi/2.54 + 0.5 );
  unshrunk_page_h  = int( h * basedpi/2.54 + 0.5 ); 
  page_w           = (int)(unshrunk_page_w / mane.shrinkfactor  + 0.5) + 2;
  page_h           = (int)(unshrunk_page_h / mane.shrinkfactor  + 0.5) + 2;
  font_pool->reset_fonts();
  changePageSize();
}


//------ this function calls the dvi interpreter ----------

void dviWindow::drawPage()
{
#ifdef DEBUG_DVIWIN
  kdDebug(4300) << "drawPage" << endl;
#endif

  setCursor(arrowCursor);

  // Stop any animation which may be in progress
  if (timerIdent != 0) {
    killTimer(timerIdent);
    timerIdent       = 0;
    animationCounter = 0;
  }

  // Stop if there is no dvi-file present
  if (dviFile == NULL) {
    resize(0, 0);
    return;
  }
  if ( dviFile->file == NULL) {
    resize(0, 0);
    return;
  }
  if ( !pixmap )
    return;

  if ( !pixmap->paintingActive() ) {
    foreGroundPaint.begin( pixmap );
    QApplication::setOverrideCursor( waitCursor );
    if (setjmp(dvi_env)) {	// dvi_oops called
      QApplication::restoreOverrideCursor();
      foreGroundPaint.end();
      KMessageBox::error( this,
			  i18n("File corruption!\n\n") +
			  QString::fromUtf8(dvi_oops_msg) +
			  i18n("\n\nMost likely this means that the DVI file\nis broken, or that it is not a DVI file."));
      return;
    } else {
      draw_page();
    }
    foreGroundPaint.drawRect(0,0,pixmap->width(),pixmap->height());
    QApplication::restoreOverrideCursor();
    foreGroundPaint.end();
  }
  repaint();
  emit contents_changed();
}


bool dviWindow::correctDVI(QString filename)
{
  QFile f(filename);
  if (!f.open(IO_ReadOnly))
    return FALSE;
  int n = f.size();
  if ( n < 134 )	// Too short for a dvi file
    return FALSE;
  f.at( n-4 );

  char test[4];
  unsigned char trailer[4] = { 0xdf,0xdf,0xdf,0xdf };

  if ( f.readBlock( test, 4 )<4 || strncmp( test, (char *) trailer, 4 ) )
    return FALSE;
  // We suppose now that the dvi file is complete	and OK
  return TRUE;
}


void dviWindow::changePageSize()
{
  if ( pixmap && pixmap->paintingActive() )
    return;

  int old_width = 0;
  if (pixmap) {
    old_width = pixmap->width();
    delete pixmap;
  }
  pixmap = new QPixmap( (int)page_w, (int)page_h );
  pixmap->fill( white );

  resize( page_w, page_h );
  currwin.win = mane.win = pixmap->handle();

  PS_interface->setSize( basedpi/mane.shrinkfactor, page_w, page_h );
  drawPage();
}

//------ setup the dvi interpreter (should do more here ?) ----------

bool dviWindow::setFile( const QString & fname )
{
  setMouseTracking(true);

  QFileInfo fi(fname);
  QString   filename = fi.absFilePath();

  // If fname is the empty string, then this means: "close". Delete
  // the dvifile and the pixmap.
  if (fname.isEmpty()) {
    // Delete DVI file
    if (info != 0)
      info->setDVIData(0);
    if (dviFile)
      delete dviFile;
    dviFile = 0;

    if (pixmap)
      delete pixmap;
    pixmap = 0;
    resize(0, 0);
    return true;
  }

  // Make sure the file actually exists.
  if (!fi.exists() || fi.isDir()) {
    KMessageBox::error( this,
			i18n("File error!\n\n") +
			i18n("The file does not exist\n") + 
			filename);
    return false;
  }

  // Check if we are really loading a DVI file, and complain about the
  // mime type, if the file is not DVI. 
  // Perhaps we should move the procedure later to the kviewpart,
  // instead of the implementaton of the multipage.
  QString mimetype( KMimeMagic::self()->findFileType( fname )->mimeType() );
  if (mimetype != "application/x-dvi") {
    KMessageBox::sorry( this,
			i18n( "Could not open file <nobr><strong>%1</strong></nobr> which has " 
			      "type <strong>%2</strong>. KDVI can only load DVI (.dvi) files." )
			.arg( fname )
			.arg( mimetype ) );
    return false;
  }

  QApplication::setOverrideCursor( waitCursor );
  if (setjmp(dvi_env)) {	// dvi_oops called
    QApplication::restoreOverrideCursor();
    KMessageBox::error( this,
			i18n("File corruption!\n\n") +
			QString::fromUtf8(dvi_oops_msg) +
			i18n("\n\nMost likely this means that the DVI file\n") + 
			filename +
			i18n("\nis broken, or that it is not a DVI file."));
    return false;
  }

  dvifile *dviFile_new = new dvifile(filename,font_pool);
  if (dviFile_new->file == NULL) {
    delete dviFile_new;
    return false;
  }

  if (dviFile)
    delete dviFile;
  dviFile = dviFile_new;
  if (info != 0)
    info->setDVIData(dviFile);

  page_w = (int)(unshrunk_page_w / mane.shrinkfactor  + 0.5) + 2;
  page_h = (int)(unshrunk_page_h / mane.shrinkfactor  + 0.5) + 2;

  // Extract PostScript from the DVI file, and store the PostScript
  // specials in PostScriptDirectory, and the headers in the
  // PostScriptHeaderString.
  PS_interface->clear();
  
  // We will also generate a list of hyperlink-anchors in the
  // document. So declare the existing list empty.
  numAnchors = 0;
  
  for(current_page=0; current_page < dviFile->total_pages; current_page++) {
    PostScriptOutPutString = new QString();
    
    (void) lseek(fileno(dviFile->file), dviFile->page_offset[current_page], SEEK_SET);
    memset((char *) &currinf.data, 0, sizeof(currinf.data));
    currinf.fonttable = tn_table;
    currinf.end       = dvi_buffer;
    currinf.pos       = dvi_buffer;
    currinf._virtual  = NULL;
    draw_part(dviFile->dimconv, false);

    if (!PostScriptOutPutString->isEmpty())
      PS_interface->setPostScript(current_page, *PostScriptOutPutString);
    delete PostScriptOutPutString;
  }
  PostScriptOutPutString = NULL;
  is_current_page_drawn  = 0;

  QApplication::restoreOverrideCursor();
  return true;
}



//------ handling pages ----------


void dviWindow::gotoPage(int new_page)
{
  if (dviFile == NULL)
    return;

  if (new_page<1)
    new_page = 1;
  if (new_page > dviFile->total_pages)
    new_page = dviFile->total_pages;
  if ((new_page-1==current_page) &&  !is_current_page_drawn)
    return;
  current_page           = new_page-1;
  is_current_page_drawn  = 0;  
  animationCounter = 0;
  drawPage();
}


void dviWindow::gotoPage(int new_page, int vflashOffset)
{
  gotoPage(new_page);
  animationCounter = 0;
  flashOffset      = vflashOffset - pixmap->height()/100; // Heuristic correction. Looks better.
  timerIdent       = startTimer(50); // Start the animation. The animation proceeds in 1/10s intervals
}

void dviWindow::timerEvent( QTimerEvent * ) 
{
  animationCounter++;
  if (animationCounter >= 10) {
    killTimer(timerIdent);
    timerIdent       = 0;
    animationCounter = 0;
  }

  repaint();
}

int dviWindow::totalPages()
{
  if (dviFile != NULL)
    return dviFile->total_pages;
  else
    return 0;
}


double dviWindow::setZoom(double zoom)
{
  // In principle, this method should never be called with illegal
  // values. In principle.
  if (zoom < KViewPart::minZoom/1000.0)
    zoom = KViewPart::minZoom/1000.0;
  if (zoom > KViewPart::maxZoom/1000.0)
    zoom = KViewPart::maxZoom/1000.0;

  mane.shrinkfactor = currwin.shrinkfactor = basedpi/(xres*zoom);
  _zoom             = zoom;

  page_w = (int)(unshrunk_page_w / mane.shrinkfactor  + 0.5) + 2;
  page_h = (int)(unshrunk_page_h / mane.shrinkfactor  + 0.5) + 2;

  font_pool->reset_fonts();
  changePageSize();
  return _zoom;
}

void dviWindow::paintEvent(QPaintEvent *)
{
  if (pixmap) {
    QPainter p(this);
    p.drawPixmap(QPoint(0, 0), *pixmap);
    if (animationCounter > 0 && animationCounter < 10) {
      int wdt = pixmap->width()/(10-animationCounter);
      int hgt = pixmap->height()/((10-animationCounter)*20);
      p.setPen(QPen(QColor(150,0,0), 3, DashLine));
      p.drawRect((pixmap->width()-wdt)/2, flashOffset, wdt, hgt);
    }
  }
}

void dviWindow::mouseMoveEvent ( QMouseEvent * e )
{
  // If no mouse button pressed
  if ( e->state() == 0 ) {
    for(int i=0; i<num_of_used_hyperlinks; i++) {
      if (hyperLinkList[i].box.contains(e->pos())) {
	setCursor(pointingHandCursor);
	return;
      }
    }
    setCursor(arrowCursor);
  }
}


void dviWindow::mousePressEvent ( QMouseEvent * e )
{
#ifdef DEBUG_SPECIAL
  kdDebug(4300) << "mouse event" << endl;
#endif

  // Check if the mouse is pressed on a regular hyperlink
  if (e->button() == LeftButton)
    for(int i=0; i<num_of_used_hyperlinks; i++) {
      if (hyperLinkList[i].box.contains(e->pos())) {
	if (hyperLinkList[i].linkText[0] == '#' ) {
#ifdef DEBUG_SPECIAL
	  kdDebug(4300) << "hit: local link to " << hyperLinkList[i].linkText << endl;
#endif
	  QString locallink = hyperLinkList[i].linkText.mid(1); // Drop the '#' at the beginning
	  for(int j=0; j<numAnchors; j++) {
	    if (locallink.compare(AnchorList_String[j]) == 0) {
#ifdef DEBUG_SPECIAL
	      kdDebug(4300) << "hit: local link to  y=" << AnchorList_Vert[j] << endl;
	      kdDebug(4300) << "hit: local link to sf=" << mane.shrinkfactor << endl;
#endif
	      emit(request_goto_page(AnchorList_Page[j], (int)(AnchorList_Vert[j]/mane.shrinkfactor)));
	      break;
	    }
	  }
	} else {
#ifdef DEBUG_SPECIAL
	  kdDebug(4300) << "hit: external link to " << hyperLinkList[i].linkText << endl;
#endif
	  QUrl DVI_Url(dviFile->filename);
	  QUrl Link_Url(DVI_Url, hyperLinkList[i].linkText, TRUE );
	
	  KShellProcess proc;
	  proc << "kfmclient openURL " << Link_Url.toString();
	  proc.start(KProcess::Block);
	  //@@@ Set up a warning requester if the command failed?
	}
	break;
      }
    }

  // Check if the mouse is pressed on a source-hyperlink
  if (e->button() == MidButton)
    for(int i=0; i<num_of_used_source_hyperlinks; i++) 
      if (sourceHyperLinkList[i].box.contains(e->pos())) {
#ifdef DEBUG_SPECIAL
	kdDebug(4300) << "Source hyperlink to " << sourceHyperLinkList[i].linkText << endl;
#endif

	QString cp = sourceHyperLinkList[i].linkText;
	int max = cp.length();
	int i;

	for(i=0; i<max; i++)
	  if (cp[i].isDigit() == false)
	    break;

	QString TeXfile = cp.mid(i);
	if (!QFile::exists(TeXfile)) {
	  KMessageBox::sorry(this, i18n("The DVI-file refers to the TeX-file "
					"<strong>%1</strong> which could not be found.").arg(TeXfile),
			     i18n( "Could not find file" ));
	  return;
	}


	QString command = editorCommand;
	if (command.isEmpty() == true) {
	  int r = KMessageBox::warningContinueCancel(this, i18n("You have not yet specified an editor for inverse search. "
								"Please choose your favourite editor in the "
								"<strong>DVI options dialog</strong> "
								"which you will find in the <strong>Settings</strong>-menu."),
						     "Need to specify editor",
						     "Use KDE's editor kate for now");
	  if (r == KMessageBox::Continue)
	    command = "xkate %f";
	  else
	    return;
	}
	command = command.replace( QRegExp("%l"), cp.left(i) ).replace( QRegExp("%f"), KShellProcess::quote(TeXfile) ); 
	
#ifdef DEBUG_SPECIAL
	kdDebug(4300) << "Calling program: " << command << endl;
#endif

	// Problem... soll ich proc benutzen oder nicht? Ohne proc
	// kann ich wahrscheinlich nicht feststellen, wenn das
	// Kommando mit fehler zur<EFBFBD>ckkehrt... andererseits ben<EFBFBD>tige ich @@@@

	proc = new KShellProcess();
	if (proc == 0) {
	  kdError(4300) << "Could not allocate ShellProcess for the editor command." << endl;
	  return;
	}
  
	qApp->connect(proc, SIGNAL(receivedStderr(KProcess *, char *, int)), this, SLOT(dvips_output_receiver(KProcess *, char *, int)));
	qApp->connect(proc, SIGNAL(receivedStdout(KProcess *, char *, int)), this, SLOT(dvips_output_receiver(KProcess *, char *, int)));
	qApp->connect(proc, SIGNAL(processExited(KProcess *)), this, SLOT(dvips_terminated(KProcess *)));

	if (info)
	  info->clear(i18n("Starting the editor..."));

	proc->clearArguments();
	*proc << command;
	proc->closeStdin();
	if (proc->start(KProcess::DontCare, KProcess::AllOutput) == false) {
	  kdError(4300) << "Editor failed to start" << endl;
	  return;
	}
      }
}

#include "dviwin.moc"