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okular/dviwin.cpp
Stefan Kebekus 384bd2934f added proper support for font encodings 
svn path=/trunk/kdegraphics/kdvi/; revision=231906
2003-06-17 06:42:22 +00:00

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//
// Class: dviWindow
//
// Widget for displaying TeX DVI files.
// Part of KDVI- A previewer for TeX DVI files.
//
// (C) 2001 Stefan Kebekus
// Distributed under the GPL
//
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <qcheckbox.h>
#include <qclipboard.h>
#include <qfileinfo.h>
#include <qlabel.h>
#include <qlayout.h>
#include <qmessagebox.h>
#include <qpaintdevice.h>
#include <qpainter.h>
#include <qprogressdialog.h>
#include <qregexp.h>
#include <qurl.h>
#include <qvbox.h>
#include <kapplication.h>
#include <kmessagebox.h>
#include <kmimemagic.h>
#include <kglobal.h>
#include <kdebug.h>
#include <keditcl.h>
#include <kfiledialog.h>
#include <kio/job.h>
#include <kio/netaccess.h>
#include <klocale.h>
#include <kprinter.h>
#include <kprocess.h>
#include <kstandarddirs.h>
#include <kstringhandler.h>
#include "dviwin.h"
#include "fontpool.h"
#include "fontprogress.h"
#include "infodialog.h"
#include "optiondialog.h"
#include "performanceMeasurement.h"
#include "xdvi.h"
#include "zoomlimits.h"
QPainter foreGroundPaint; // QPainter used for text
//------ now comes the dviWindow class implementation ----------
dviWindow::dviWindow(double zoom, QWidget *parent, const char *name )
: QWidget( parent, name )
{
#ifdef DEBUG_DVIWIN
kdDebug(4300) << "dviWindow( zoom=" << zoom << ", mkpk=" << mkpk << ", parent=" << parent << ", name=" << name << " )" << endl;
#endif
shrinkfactor = 3;
setBackgroundMode(NoBackground);
setFocusPolicy(QWidget::StrongFocus);
setFocus();
connect( &clearStatusBarTimer, SIGNAL(timeout()), this, SLOT(clearStatusBar()) );
currentlyDrawnPage.sourceHyperLinkList.reserve(200);
currentlyDrawnPage.textLinkList.reserve(250);
// 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(fontPool *)), this, SLOT(all_fonts_loaded(fontPool *)));
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_have_been_loaded(fontPool *)), info, SLOT(setFontInfo(fontPool *)));
qApp->connect(font_pool, SIGNAL(new_kpsewhich_run(QString)), info, SLOT(clear(QString)));
}
editorCommand = "";
// 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.
xres = QPaintDevice::x11AppDpiX ();
// 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 < ZoomLimits::MinZoom/1000.0)
zoom = ZoomLimits::MinZoom/1000.0;
if (zoom > ZoomLimits::MaxZoom/1000.0)
zoom = ZoomLimits::MaxZoom/1000.0;
_zoom = zoom;
paper_width_in_cm = 21.0; // set A4 paper as default
paper_height_in_cm = 27.9;
PostScriptOutPutString = NULL;
HTML_href = NULL;
_postscript = 0;
_showHyperLinks = true;
currentlyDrawnPage.pixmap = 0;
findDialog = 0;
findNextAction = 0;
findPrevAction = 0;
DVIselection.clear();
reference = QString::null;
searchText = QString::null;
// Storage used for dvips and friends, i.e. for the "export" functions.
proc = 0;
progress = 0;
export_printer = 0;
export_fileName = "";
export_tmpFileName = "";
export_errorString = "";
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;
if (currentlyDrawnPage.pixmap)
delete currentlyDrawnPage.pixmap;
delete PS_interface;
if (dviFile)
delete dviFile;
if (font_pool)
delete font_pool;
// 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_filenames_are_looked_up() 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_filenames_are_looked_up();
info->show();
}
void dviWindow::selectAll(void)
{
QString selectedText("");
for(unsigned int i = 0; i < currentlyDrawnPage.textLinkList.size(); i++) {
selectedText += currentlyDrawnPage.textLinkList[i].linkText;
selectedText += "\n";
}
DVIselection.set(0, currentlyDrawnPage.textLinkList.size()-1, selectedText);
update();
}
void dviWindow::copyText(void)
{
QApplication::clipboard()->setSelectionMode(false);
QApplication::clipboard()->setText(DVIselection.selectedText);
}
void dviWindow::setShowPS( bool flag )
{
#ifdef DEBUG_DVIWIN
kdDebug(4300) << "setShowPS" << endl;
#endif
if ( _postscript == flag )
return;
_postscript = flag;
drawPage();
}
void dviWindow::setShowHyperLinks( bool flag )
{
if ( _showHyperLinks == flag )
return;
_showHyperLinks = flag;
drawPage();
}
void dviWindow::setPaper(double width_in_cm, double height_in_cm)
{
#ifdef DEBUG_DVIWIN
kdDebug(4300) << "dviWindow::setPaper( width_in_cm=" << width_in_cm << ", height_in_cm=" << height_in_cm << " )" << endl;
#endif
paper_width_in_cm = width_in_cm;
paper_height_in_cm = height_in_cm;
changePageSize();
}
//------ this function calls the dvi interpreter ----------
void dviWindow::drawPage()
{
#ifdef DEBUG_DVIWIN
kdDebug(4300) << "dviWindow::drawPage()" << endl;
#endif
#ifdef PERFORMANCE_MEASUREMENT
start:
#endif
shrinkfactor = MFResolutions[font_pool->getMetafontMode()]/(xres*_zoom);
setCursor(arrowCursor);
// Stop any animation which may be in progress
if (timerIdent != 0) {
killTimer(timerIdent);
timerIdent = 0;
animationCounter = 0;
}
// Remove the mouse selection
DVIselection.clear();
// Stop if there is no dvi-file present
if ( dviFile == 0 ) {
resize(0, 0);
return;
}
if ( dviFile->dvi_Data == 0 ) {
resize(0, 0);
return;
}
if ( !currentlyDrawnPage.pixmap )
return;
if ( !currentlyDrawnPage.pixmap->paintingActive() ) {
// Reset colors
colorStack.clear();
globalColor = Qt::black;
foreGroundPaint.begin( currentlyDrawnPage.pixmap );
QApplication::setOverrideCursor( waitCursor );
errorMsg = QString::null;
draw_page();
foreGroundPaint.drawRect(0, 0, currentlyDrawnPage.pixmap->width(), currentlyDrawnPage.pixmap->height());
foreGroundPaint.end();
QApplication::restoreOverrideCursor();
if (errorMsg.isEmpty() != true) {
KMessageBox::detailedError(this,
i18n("<qt><strong>File corruption!</strong> KDVI had trouble interpreting your DVI file. Most "
"likely this means that the DVI file is broken.</qt>"),
errorMsg, i18n("DVI File error"));
return;
}
// Tell the user (once) if the DVI file contains source specials
// ... wo don't want our great feature to go unnoticed. In
// principle, we should use a KMessagebox here, but we want to add
// a button "Explain in more detail..." which opens the
// Helpcenter. Thus, we practically re-implement the KMessagebox
// here. Most of the code is stolen from there.
if ((dviFile->sourceSpecialMarker == true) && (currentlyDrawnPage.sourceHyperLinkList.size() > 0)) {
dviFile->sourceSpecialMarker = false;
// Check if the 'Don't show again' feature was used
KConfig *config = kapp->config();
KConfigGroupSaver saver( config, "Notification Messages" );
bool showMsg = config->readBoolEntry( "KDVI-info_on_source_specials", true);
if (showMsg) {
KDialogBase *dialog= new KDialogBase(i18n("KDVI: Information"), KDialogBase::Yes, KDialogBase::Yes, KDialogBase::Yes,
this, "information", true, true, i18n("&OK"));
QVBox *topcontents = new QVBox (dialog);
topcontents->setSpacing(KDialog::spacingHint()*2);
topcontents->setMargin(KDialog::marginHint()*2);
QWidget *contents = new QWidget(topcontents);
QHBoxLayout * lay = new QHBoxLayout(contents);
lay->setSpacing(KDialog::spacingHint()*2);
lay->addStretch(1);
QLabel *label1 = new QLabel( contents);
label1->setPixmap(QMessageBox::standardIcon(QMessageBox::Information));
lay->add( label1 );
QLabel *label2 = new QLabel( i18n("<qt>This DVI file contains source file information. You may click into the text with the "
"middle mouse button, and an editor will open the TeX-source file immediately.</qt>"),
contents);
label2->setMinimumSize(label2->sizeHint());
lay->add( label2 );
lay->addStretch(1);
QSize extraSize = QSize(50,30);
QCheckBox *checkbox = new QCheckBox(i18n("Do not show this message again"), topcontents);
extraSize = QSize(50,0);
dialog->setHelpLinkText(i18n("Explain in more detail..."));
dialog->setHelp("inverse-search", "kdvi");
dialog->enableLinkedHelp(true);
dialog->setMainWidget(topcontents);
dialog->enableButtonSeparator(false);
dialog->incInitialSize( extraSize );
dialog->exec();
delete dialog;
showMsg = !checkbox->isChecked();
if (!showMsg) {
KConfigGroupSaver saver( config, "Notification Messages" );
config->writeEntry( "KDVI-info_on_source_specials", showMsg);
}
config->sync();
}
}
}
// WORK IN PROGRESS
/* repaint();
unsigned int current_page_sav = current_page;
qApp->processEvents();
if (current_page_sav == current_page)
emit contents_changed();
*/
repaint();
// update();
emit contents_changed();
#ifdef PERFORMANCE_MEASUREMENT
if (performanceFlag == 1) {
qApp->processEvents(30);
current_page++;
if (current_page < dviFile->total_pages)
goto start;
else {
kdDebug(4300) << "Time required to draw all pages: " << performanceTimer.restart() << "ms" << endl;
performanceFlag = 2;
exit(0);
}
}
#endif
}
bool dviWindow::correctDVI(QString filename)
{
QFile f(filename);
if (!f.open(IO_ReadOnly))
return FALSE;
unsigned char test[4];
if ( f.readBlock( (char *)test,2)<2 || test[0] != 247 || test[1] != 2 )
return FALSE;
int n = f.size();
if ( n < 134 ) // Too short for a dvi file
return FALSE;
f.at( n-4 );
unsigned char trailer[4] = { 0xdf,0xdf,0xdf,0xdf };
if ( f.readBlock( (char *)test, 4 )<4 || strncmp( (char *)test, (char *) trailer, 4 ) )
return FALSE;
// We suppose now that the dvi file is complete and OK
return TRUE;
}
void dviWindow::changePageSize()
{
#ifdef DEBUG_DVIWIN
kdDebug(4300) << "dviWindow::changePageSize()" << endl;
#endif
if ( currentlyDrawnPage.pixmap && currentlyDrawnPage.pixmap->paintingActive() )
return;
if (currentlyDrawnPage.pixmap)
delete currentlyDrawnPage.pixmap;
unsigned int page_width_in_pixel = (unsigned int)(_zoom*paper_width_in_cm/2.54 * xres + 0.5);
unsigned int page_height_in_pixel = (unsigned int)(_zoom*paper_height_in_cm/2.54 * xres + 0.5);
currentlyDrawnPage.pixmap = new QPixmap( page_width_in_pixel, page_height_in_pixel );
if (currentlyDrawnPage.pixmap == 0) {
kdError(4300) << "dviWindow::changePageSize(), no memory for pixmap, width=" << page_width_in_pixel << ", height=" << page_height_in_pixel << endl;
exit(0);
}
currentlyDrawnPage.pixmap->fill( white );
resize( page_width_in_pixel, page_height_in_pixel );
PS_interface->setSize( xres*_zoom, page_width_in_pixel, page_height_in_pixel );
drawPage();
}
//------ setup the dvi interpreter (should do more here ?) ----------
bool dviWindow::setFile(QString fname, QString ref, bool sourceMarker)
{
DVIselection.clear();
reference = QString::null;
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 (currentlyDrawnPage.pixmap)
delete currentlyDrawnPage.pixmap;
currentlyDrawnPage.pixmap = 0;
resize(0, 0);
return true;
}
// Make sure the file actually exists.
if (!fi.exists() || fi.isDir()) {
KMessageBox::error( this,
i18n("<qt><strong>File error!</strong> The specified file '%1' does not exist. "
"KDVI already tried to add the ending '.dvi'</qt>").arg(filename),
i18n("File Error!"));
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 in
// the multipage.
QString mimetype( KMimeMagic::self()->findFileType( fname )->mimeType() );
if (mimetype != "application/x-dvi") {
KMessageBox::sorry( this,
i18n( "<qt>Could not open file <nobr><strong>%1</strong></nobr> which has "
"type <strong>%2</strong>. KDVI can only load DVI (.dvi) files.</qt>" )
.arg( fname )
.arg( mimetype ) );
return false;
}
QApplication::setOverrideCursor( waitCursor );
dvifile *dviFile_new = new dvifile(filename, font_pool, sourceMarker);
if ((dviFile_new->dvi_Data == NULL)||(dviFile_new->errorMsg.isEmpty() != true)) {
QApplication::restoreOverrideCursor();
if (dviFile_new->errorMsg.isEmpty() != true)
KMessageBox::detailedError(this,
i18n("<qt>File corruption! KDVI had trouble interpreting your DVI file. Most "
"likely this means that the DVI file is broken.</qt>"),
dviFile_new->errorMsg, i18n("DVI File Error"));
delete dviFile_new;
return false;
}
if (dviFile)
delete dviFile;
dviFile = dviFile_new;
if (info != 0)
info->setDVIData(dviFile);
// Extract PostScript from the DVI file, and store the PostScript
// specials in PostScriptDirectory, and the headers in the
// PostScriptHeaderString.
PS_interface->clear();
// Files that reside under "tmp" or under the "data" resource are most
// likely remote files. We limit the files they are able to read to
// the directory they are in in order to limit the possibilities of a
// denial of service attack.
bool restrictIncludePath = true;
QString tmp = KGlobal::dirs()->saveLocation("tmp", QString::null);
if (!filename.startsWith(tmp))
{
tmp = KGlobal::dirs()->saveLocation("data", QString::null);
if (!filename.startsWith(tmp))
restrictIncludePath = false;
}
QString includePath;
if (restrictIncludePath)
{
includePath = filename;
includePath.truncate(includePath.findRev('/'));
}
PS_interface->setIncludePath(includePath);
// We will also generate a list of hyperlink-anchors and source-file
// anchors in the document. So declare the existing lists empty.
anchorList.clear();
sourceHyperLinkAnchors.clear();
if (dviFile->page_offset == 0)
return false;
// Prescan phase starts here
#ifdef PERFORMANCE_MEASUREMENT
kdDebug(4300) << "Time elapsed till prescan phase starts " << performanceTimer.elapsed() << "ms" << endl;
QTime preScanTimer;
preScanTimer.start();
#endif
for(current_page=0; current_page < dviFile->total_pages; current_page++) {
PostScriptOutPutString = new QString();
if (current_page < dviFile->total_pages) {
command_pointer = dviFile->dvi_Data + dviFile->page_offset[current_page];
end_pointer = dviFile->dvi_Data + dviFile->page_offset[current_page+1];
} else
command_pointer = end_pointer = 0;
memset((char *) &currinf.data, 0, sizeof(currinf.data));
currinf.fonttable = &(dviFile->tn_table);
currinf._virtual = NULL;
draw_part(65536.0*fontPixelPerDVIunit(), false);
if (!PostScriptOutPutString->isEmpty())
PS_interface->setPostScript(current_page, *PostScriptOutPutString);
delete PostScriptOutPutString;
}
PostScriptOutPutString = NULL;
is_current_page_drawn = 0;
#ifdef PERFORMANCE_MEASUREMENT
kdDebug(4300) << "Time required for prescan phase: " << preScanTimer.restart() << "ms" << endl;
#endif
QApplication::restoreOverrideCursor();
reference = ref;
return true;
}
void dviWindow::all_fonts_loaded(fontPool *)
{
if (dviFile == 0)
return;
drawPage();
// case 1: The reference is a number, which we'll interpret as a
// page number.
bool ok;
int page = reference.toInt ( &ok );
if (ok == true) {
page--;
if (page < 0)
page = 0;
if (page >= dviFile->total_pages)
page = dviFile->total_pages-1;
emit(request_goto_page(page, -1000));
reference = QString::null;
return;
}
// case 2: The reference is of form "src:1111Filename", where "1111"
// points to line number 1111 in the file "Filename". KDVI then
// looks for source specials of the form "src:xxxxFilename", and
// tries to find the special with the biggest xxxx
if (reference.find("src:",0,false) == 0) {
QString ref = reference.mid(4);
// Extract the file name and the numeral part from the reference string
Q_UINT32 i;
for(i=0;i<ref.length();i++)
if (!ref.at(i).isNumber())
break;
Q_UINT32 refLineNumber = ref.left(i).toUInt();
QString refFileName = QFileInfo(ref.mid(i).stripWhiteSpace()).absFilePath();
if (sourceHyperLinkAnchors.isEmpty()) {
KMessageBox::sorry(this, i18n("<qt>You have asked KDVI to locate the place in the DVI file which corresponds to "
"line %1 in the TeX-file <strong>%2</strong>. It seems, however, that the DVI file "
"does not contain the necessary source file information. "
"We refer to the manual of KDVI for a detailed explanation on how to include this "
"information. Press the F1 key to open the manual.</qt>").arg(ref.left(i)).arg(refFileName),
i18n( "Could not Find Reference" ));
return;
}
Q_INT32 page = 0;
Q_INT32 y = -1000;
QValueVector<DVI_SourceFileAnchor>::iterator it;
for( it = sourceHyperLinkAnchors.begin(); it != sourceHyperLinkAnchors.end(); ++it )
if (refFileName.stripWhiteSpace() == it->fileName.stripWhiteSpace()) {
if (refLineNumber >= it->line) {
page = it->page;
y = (Q_INT32)(it->vertical_coordinate/shrinkfactor+0.5);
}
}
reference = QString::null;
if (y >= 0)
emit(request_goto_page(page, y));
if (y < 0)
KMessageBox::sorry(this, i18n("<qt>KDVI was not able to locate the place in the DVI file which corresponds to "
"line %1 in the TeX-file <strong>%2</strong>.</qt>").arg(ref.left(i)).arg(refFileName),
i18n( "Could not Find Reference" ));
return;
}
reference = QString::null;
}
//------ handling pages ----------
void dviWindow::gotoPage(unsigned 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;
if (timerIdent != 0)
killTimer(timerIdent);
flashOffset = vflashOffset - currentlyDrawnPage.pixmap->height()/100; // Heuristic correction. Looks better.
timerIdent = startTimer(50); // Start the animation. The animation proceeds in 1/10s intervals
}
void dviWindow::timerEvent( QTimerEvent *e )
{
animationCounter++;
if (animationCounter >= 10) {
killTimer(e->timerId());
timerIdent = 0;
animationCounter = 0;
}
repaint(0, flashOffset, currentlyDrawnPage.pixmap->width(), currentlyDrawnPage.pixmap->height()/19, false);
}
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 < ZoomLimits::MinZoom/1000.0)
zoom = ZoomLimits::MinZoom/1000.0;
if (zoom > ZoomLimits::MaxZoom/1000.0)
zoom = ZoomLimits::MaxZoom/1000.0;
shrinkfactor = MFResolutions[font_pool->getMetafontMode()]/(xres*zoom);
_zoom = zoom;
font_pool->setDisplayResolution( xres*zoom );
changePageSize();
return _zoom;
}
void dviWindow::paintEvent(QPaintEvent *e)
{
if (currentlyDrawnPage.pixmap) {
bitBlt ( this, e->rect().topLeft(), currentlyDrawnPage.pixmap, e->rect(), CopyROP);
QPainter p(this);
p.setClipRect(e->rect());
if (animationCounter > 0 && animationCounter < 10) {
int wdt = currentlyDrawnPage.pixmap->width()/(10-animationCounter);
int hgt = currentlyDrawnPage.pixmap->height()/((10-animationCounter)*20);
p.setPen(QPen(QColor(150,0,0), 3, DashLine));
p.drawRect((currentlyDrawnPage.pixmap->width()-wdt)/2, flashOffset, wdt, hgt);
}
// Mark selected text.
if (DVIselection.selectedTextStart != -1)
for(unsigned int i = DVIselection.selectedTextStart; (i <= DVIselection.selectedTextEnd)&&(i < currentlyDrawnPage.textLinkList.size()); i++) {
p.setPen( NoPen );
p.setBrush( white );
p.setRasterOp( Qt::XorROP );
p.drawRect(currentlyDrawnPage.textLinkList[i].box);
}
}
}
void dviWindow::clearStatusBar(void)
{
emit setStatusBarText( QString::null );
}
void dviWindow::mouseMoveEvent ( QMouseEvent * e )
{
// If no mouse button pressed
if ( e->state() == 0 ) {
// go through hyperlinks
for(unsigned int i=0; i<currentlyDrawnPage.hyperLinkList.size(); i++) {
if (currentlyDrawnPage.hyperLinkList[i].box.contains(e->pos())) {
clearStatusBarTimer.stop();
setCursor(pointingHandCursor);
QString link = currentlyDrawnPage.hyperLinkList[i].linkText;
if ( link.startsWith("#") )
link = link.remove(0,1);
emit setStatusBarText( i18n("Link to %1").arg(link) );
return;
}
}
// Cursor not over hyperlink? Then let the cursor be the usual arrow
setCursor(arrowCursor);
// But maybe the cursor hovers over a sourceHyperlink?
for(unsigned int i=0; i<currentlyDrawnPage.sourceHyperLinkList.size(); i++) {
if (currentlyDrawnPage.sourceHyperLinkList[i].box.contains(e->pos())) {
clearStatusBarTimer.stop();
KStringHandler kstr;
QString line = kstr.word(currentlyDrawnPage.sourceHyperLinkList[i].linkText, "0");
QString file = kstr.word(currentlyDrawnPage.sourceHyperLinkList[i].linkText, "1:");
emit setStatusBarText( i18n("Link to line %1 of %2").arg(line).arg(file) );
return;
}
}
if (!clearStatusBarTimer.isActive())
clearStatusBarTimer.start( 200, TRUE ); // clear the statusbar after 200 msec.
return;
}
// Right mouse button pressed -> Text copy function
if ((e->state() & RightButton) != 0) {
if (selectedRectangle.isEmpty()) {
firstSelectedPoint = e->pos();
selectedRectangle.setRect(e->pos().x(),e->pos().y(),1,1);
} else {
int lx = e->pos().x() < firstSelectedPoint.x() ? e->pos().x() : firstSelectedPoint.x();
int rx = e->pos().x() > firstSelectedPoint.x() ? e->pos().x() : firstSelectedPoint.x();
int ty = e->pos().y() < firstSelectedPoint.y() ? e->pos().y() : firstSelectedPoint.y();
int by = e->pos().y() > firstSelectedPoint.y() ? e->pos().y() : firstSelectedPoint.y();
selectedRectangle.setCoords(lx,ty,rx,by);
}
// Now that we know the rectangle, we have to find out which words
// intersect it!
Q_INT32 selectedTextStart = -1;
Q_INT32 selectedTextEnd = -1;
for(unsigned int i=0; i<currentlyDrawnPage.textLinkList.size(); i++)
if ( selectedRectangle.intersects(currentlyDrawnPage.textLinkList[i].box) ) {
if (selectedTextStart == -1)
selectedTextStart = i;
selectedTextEnd = i;
}
QString selectedText("");
if (selectedTextStart != -1)
for(unsigned int i = selectedTextStart; (i <= selectedTextEnd)&&(i < currentlyDrawnPage.textLinkList.size()); i++) {
selectedText += currentlyDrawnPage.textLinkList[i].linkText;
selectedText += "\n";
}
if ((selectedTextStart != DVIselection.selectedTextStart) || (selectedTextEnd != DVIselection.selectedTextEnd)) {
if (selectedTextEnd == -1) {
DVIselection.clear();
update();
} else {
// Find the rectangle that needs to be updated (reduces
// flicker)
int a = DVIselection.selectedTextStart;
int b = DVIselection.selectedTextEnd+1;
int c = selectedTextStart;
int d = selectedTextEnd+1;
int i1 = kMin(a,c);
int i2 = kMin(kMax(a,c),kMin(b,d));
int i3 = kMax(kMax(a,c),kMin(b,d));
int i4 = kMax(b,d);
QRect box;
int i=i1;
while(i<i2) {
if (i != -1)
box = box.unite(currentlyDrawnPage.textLinkList[i].box);
i++;
}
for(int i=i3; i<i4; i++)
if (i != -1)
box = box.unite(currentlyDrawnPage.textLinkList[i].box);
DVIselection.set(selectedTextStart, selectedTextEnd, selectedText);
update(box);
}
}
}
}
void dviWindow::mouseReleaseEvent ( QMouseEvent * )
{
selectedRectangle.setRect(0,0,0,0);
}
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) && (currentlyDrawnPage.hyperLinkList.size() > 0))
for(int i=0; i<currentlyDrawnPage.hyperLinkList.size(); i++) {
if (currentlyDrawnPage.hyperLinkList[i].box.contains(e->pos())) {
if (currentlyDrawnPage.hyperLinkList[i].linkText[0] == '#' ) {
#ifdef DEBUG_SPECIAL
kdDebug(4300) << "hit: local link to " << currentlyDrawnPage.hyperLinkList[i].linkText << endl;
#endif
QString locallink = currentlyDrawnPage.hyperLinkList[i].linkText.mid(1); // Drop the '#' at the beginning
QMap<QString,DVI_Anchor>::Iterator it = anchorList.find(locallink);
if (it != anchorList.end()) {
#ifdef DEBUG_SPECIAL
kdDebug(4300) << "hit: local link to y=" << AnchorList_Vert[j] << endl;
kdDebug(4300) << "hit: local link to sf=" << shrinkfactor << endl;
#endif
emit(request_goto_page(it.data().page, (int)(it.data().vertical_coordinate/shrinkfactor)));
}
} else {
#ifdef DEBUG_SPECIAL
kdDebug(4300) << "hit: external link to " << currentlyDrawnPage.hyperLinkList[i].linkText << endl;
#endif
// We could in principle use KIO::Netaccess::run() here, but
// it is perhaps not a very good idea to allow a DVI-file to
// specify arbitrary commands, such as "rm -rvf /". Using
// the kfmclient seems to be MUCH safer.
QUrl DVI_Url(dviFile->filename);
QUrl Link_Url(DVI_Url, currentlyDrawnPage.hyperLinkList[i].linkText, TRUE );
QStringList args;
args << "openURL";
args << Link_Url.toString();
kapp->kdeinitExec("kfmclient", args);
}
break;
}
}
// Check if the mouse is pressed on a source-hyperlink
if ((e->button() == MidButton) && (currentlyDrawnPage.sourceHyperLinkList.size() > 0))
for(unsigned int i=0; i<currentlyDrawnPage.sourceHyperLinkList.size(); i++)
if (currentlyDrawnPage.sourceHyperLinkList[i].box.contains(e->pos())) {
#ifdef DEBUG_SPECIAL
kdDebug(4300) << "Source hyperlink to " << currentlyDrawnPage.sourceHyperLinkList[i].linkText << endl;
#endif
QString cp = currentlyDrawnPage.sourceHyperLinkList[i].linkText;
int max = cp.length();
int i;
for(i=0; i<max; i++)
if (cp[i].isDigit() == false)
break;
// The macro-package srcltx gives a special like "src:99 test.tex"
// while MikTeX gives "src:99test.tex". KDVI tries
// to understand both.
QFileInfo fi1(dviFile->filename);
QFileInfo fi2(fi1.dir(),cp.mid(i+1));
QString TeXfile;
if ( fi2.exists() )
TeXfile = fi2.absFilePath();
else {
QFileInfo fi3(fi1.dir(),cp.mid(i));
TeXfile = fi3.absFilePath();
if ( !fi3.exists() ) {
KMessageBox::sorry(this, i18n("The DVI-file refers to the TeX-file "
"<strong>%1</strong> which could not be found.").arg(KShellProcess::quote(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 favorite editor in the "
"<strong>DVI options dialog</strong> "
"which you will find in the <strong>Settings</strong>-menu."),
i18n("Need to Specify Editor"),
i18n("Use KDE's Editor Kate for Now"));
if (r == KMessageBox::Continue)
command = "kate %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
// There may still be another program running. Since we don't
// want to mix the output of several programs, we will
// henceforth dimiss the output of the older programm. "If it
// hasn't failed until now, we don't care."
if (proc != 0) {
qApp->disconnect(proc, SIGNAL(receivedStderr(KProcess *, char *, int)), 0, 0);
qApp->disconnect(proc, SIGNAL(receivedStdout(KProcess *, char *, int)), 0, 0);
proc = 0;
}
// Set up a shell process with the editor command.
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(editorCommand_terminated(KProcess *)));
// Merge the editor-specific editor message here.
export_errorString = i18n("<qt>The external program<br><br><tt><strong>%1</strong></tt><br/><br/>which was used to call the editor "
"for inverse search, 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. The "
"manual for KDVI contains a detailed explanation how to set up your editor for use with KDVI, "
"and a list of common problems.</qt>").arg(command);
if (info)
info->clear(i18n("Starting the editor..."));
animationCounter = 0;
flashOffset = e->y(); // Heuristic correction. Looks better.
timerIdent = startTimer(50); // Start the animation. The animation proceeds in 1/10s intervals
proc->clearArguments();
*proc << command;
proc->closeStdin();
if (proc->start(KProcess::NotifyOnExit, KProcess::AllOutput) == false) {
kdError(4300) << "Editor failed to start" << endl;
return;
}
}
}
#include "dviwin.moc"
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