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tdegraphics/kdvi/dviRenderer.cpp

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//
// Class: dviRenderer
//
// Class for rendering TeX DVI files.
// Part of KDVI- A previewer for TeX DVI files.
//
// (C) 2001-2005 Stefan Kebekus
// Distributed under the GPL
//
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <tqcheckbox.h>
#include <tqclipboard.h>
#include <tqcursor.h>
#include <tqlabel.h>
#include <tqfileinfo.h>
#include <tqlayout.h>
#include <tqmessagebox.h>
#include <tqpaintdevice.h>
#include <tqpainter.h>
#include <tqptrstack.h>
#include <tqregexp.h>
#include <tqurl.h>
#include <tqvbox.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 <kprogress.h>
#include <kstandarddirs.h>
#include <kstdguiitem.h>
#include "documentWidget.h"
#include "dviFile.h"
#include "dviRenderer.h"
#include "fontpool.h"
#include "fontprogress.h"
#include "hyperlink.h"
#include "infodialog.h"
#include "kdvi_multipage.h"
#include "performanceMeasurement.h"
#include "prebookmark.h"
#include "psgs.h"
#include "xdvi.h"
#include "zoomlimits.h"
#include "dvisourcesplitter.h"
#include "renderedDviPagePixmap.h"
//#define DEBUG_DVIRENDERER
TQPainter *foreGroundPainter; // TQPainter used for text
//------ now comes the dviRenderer class implementation ----------
dviRenderer::dviRenderer(TQWidget *par)
: DocumentRenderer(par), info(new infoDialog(par))
{
#ifdef DEBUG_DVIRENDERER
kdDebug(4300) << "dviRenderer( parent=" << par << " )" << endl;
#endif
// initialize the dvi machinery
dviFile = 0;
connect(&font_pool, TQT_SIGNAL( setStatusBarText( const TQString& ) ), this, TQT_SIGNAL( setStatusBarText( const TQString& ) ) );
parentWidget = par;
shrinkfactor = 3;
current_page = 0;
resolutionInDPI = 0.0;
connect( &clearStatusBarTimer, TQT_SIGNAL(timeout()), this, TQT_SLOT(clearStatusBar()) );
currentlyDrawnPage = 0;
editorCommand = "";
PostScriptOutPutString = NULL;
HTML_href = NULL;
_postscript = 0;
// 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();
// pass status bar messages through
connect(PS_interface, TQT_SIGNAL( setStatusBarText( const TQString& ) ), this, TQT_SIGNAL( setStatusBarText( const TQString& ) ) );
}
dviRenderer::~dviRenderer()
{
#ifdef DEBUG_DVIRENDERER
kdDebug(4300) << "~dviRenderer" << endl;
#endif
mutex.lock();
mutex.unlock();
delete PS_interface;
delete proc;
delete dviFile;
// Don't delete the export printer. This is owned by the
// kdvi_multipage.
export_printer = 0;
}
void dviRenderer::setPrefs(bool flag_showPS, const TQString &str_editorCommand, bool useFontHints )
{
TQMutexLocker locker(&mutex);
_postscript = flag_showPS;
editorCommand = str_editorCommand;
font_pool.setParameters( useFontHints );
emit(documentIsChanged());
}
void dviRenderer::showInfo()
{
mutex.lock();
info->setDVIData(dviFile);
info->show();
mutex.unlock();
}
//------ this function calls the dvi interpreter ----------
void dviRenderer::drawPage(double resolution, RenderedDocumentPage *page)
{
#ifdef DEBUG_DVIRENDERER
kdDebug(4300) << "dviRenderer::drawPage(documentPage *) called, page number " << page->getPageNumber() << endl;
#endif
// Paranoid safety checks
if (page == 0) {
kdError(4300) << "dviRenderer::drawPage(documentPage *) called with argument == 0" << endl;
return;
}
if (page->getPageNumber() == 0) {
kdError(4300) << "dviRenderer::drawPage(documentPage *) called for a documentPage with page number 0" << endl;
return;
}
mutex.lock();
if ( dviFile == 0 ) {
kdError(4300) << "dviRenderer::drawPage(documentPage *) called, but no dviFile class allocated." << endl;
page->clear();
mutex.unlock();
return;
}
if (page->getPageNumber() > dviFile->total_pages) {
kdError(4300) << "dviRenderer::drawPage(documentPage *) called for a documentPage with page number " << page->getPageNumber()
<< " but the current dviFile has only " << dviFile->total_pages << " pages." << endl;
mutex.unlock();
return;
}
if ( dviFile->dvi_Data() == 0 ) {
kdError(4300) << "dviRenderer::drawPage(documentPage *) called, but no dviFile is loaded yet." << endl;
page->clear();
mutex.unlock();
return;
}
if (resolution != resolutionInDPI)
setResolution(resolution);
currentlyDrawnPage = page;
shrinkfactor = 1200/resolutionInDPI;
current_page = page->getPageNumber()-1;
// Reset colors
colorStack.clear();
globalColor = Qt::black;
TQApplication::setOverrideCursor( waitCursor );
foreGroundPainter = page->getPainter();
if (foreGroundPainter != 0) {
errorMsg = TQString::null;
draw_page();
page->returnPainter(foreGroundPainter);
}
TQApplication::restoreOverrideCursor();
page->isEmpty = false;
if (errorMsg.isEmpty() != true) {
KMessageBox::detailedError(parentWidget,
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"));
errorMsg = TQString::null;
currentlyDrawnPage = 0;
mutex.unlock();
return;
}
// Tell the user (once) if the DVI file contains source specials
// ... we don't want our great feature to go unnoticed.
RenderedDviPagePixmap* currentDVIPage = dynamic_cast<RenderedDviPagePixmap*>(currentlyDrawnPage);
if (currentDVIPage)
{
if ((dviFile->sourceSpecialMarker == true) && (currentDVIPage->sourceHyperLinkList.size() > 0)) {
dviFile->sourceSpecialMarker = false;
// Show the dialog as soon as event processing is finished, and
// the program is idle
TQTimer::singleShot( 0, this, TQT_SLOT(showThatSourceInformationIsPresent()) );
}
}
currentlyDrawnPage = 0;
mutex.unlock();
}
void dviRenderer::getText(RenderedDocumentPage* page)
{
bool postscriptBackup = _postscript;
// Disable postscript-specials temporarely to speed up text extraction.
_postscript = false;
drawPage(100.0, page);
_postscript = postscriptBackup;
}
void dviRenderer::showThatSourceInformationIsPresent()
{
// 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.
// 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,
parentWidget, "information", true, true,KStdGuiItem::ok() );
TQVBox *topcontents = new TQVBox (dialog);
topcontents->setSpacing(KDialog::spacingHint()*2);
topcontents->setMargin(KDialog::marginHint()*2);
TQWidget *contents = new TQWidget(topcontents);
TQHBoxLayout * lay = new TQHBoxLayout(contents);
lay->setSpacing(KDialog::spacingHint()*2);
lay->addStretch(1);
TQLabel *label1 = new TQLabel( contents);
label1->setPixmap(TQMessageBox::standardIcon(TQMessageBox::Information));
lay->add( label1 );
TQLabel *label2 = new TQLabel( 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);
TQSize extraSize = TQSize(50,30);
TQCheckBox *checkbox = new TQCheckBox(i18n("Do not show this message again"), topcontents);
extraSize = TQSize(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();
}
}
void dviRenderer::embedPostScript()
{
#ifdef DEBUG_DVIRENDERER
kdDebug(4300) << "dviRenderer::embedPostScript()" << endl;
#endif
if (!dviFile)
return;
embedPS_progress = new KProgressDialog(parentWidget, "embedPSProgressDialog",
i18n("Embedding PostScript Files"), TQString::null, true);
if (!embedPS_progress)
return;
embedPS_progress->setAllowCancel(false);
embedPS_progress->showCancelButton(false);
embedPS_progress->setMinimumDuration(400);
embedPS_progress->progressBar()->setTotalSteps(dviFile->numberOfExternalPSFiles);
embedPS_progress->progressBar()->setProgress(0);
embedPS_numOfProgressedFiles = 0;
Q_UINT16 currPageSav = current_page;
errorMsg = TQString::null;
for(current_page=0; current_page < dviFile->total_pages; current_page++) {
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;
prescan(&dviRenderer::prescan_embedPS);
}
delete embedPS_progress;
if (!errorMsg.isEmpty()) {
errorMsg = "<qt>" + errorMsg + "</qt>";
KMessageBox::detailedError(parentWidget, "<qt>" + i18n("Not all PostScript files could be embedded into your document.") + "</qt>", errorMsg);
errorMsg = TQString::null;
} else
KMessageBox::information(parentWidget, "<qt>" + i18n("All external PostScript files were embedded into your document. You "
"will probably want to save the DVI file now.") + "</qt>",
TQString::null, "embeddingDone");
// Prescan phase starts here
#ifdef PERFORMANCE_MEASUREMENT
kdDebug(4300) << "Time elapsed till prescan phase starts " << performanceTimer.elapsed() << "ms" << endl;
TQTime preScanTimer;
preScanTimer.start();
#endif
dviFile->numberOfExternalPSFiles = 0;
prebookmarks.clear();
for(current_page=0; current_page < dviFile->total_pages; current_page++) {
PostScriptOutPutString = new TQString();
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;
prescan(&dviRenderer::prescan_parseSpecials);
if (!PostScriptOutPutString->isEmpty())
PS_interface->setPostScript(current_page, *PostScriptOutPutString);
delete PostScriptOutPutString;
}
PostScriptOutPutString = NULL;
#ifdef PERFORMANCE_MEASUREMENT
kdDebug(4300) << "Time required for prescan phase: " << preScanTimer.restart() << "ms" << endl;
#endif
current_page = currPageSav;
_isModified = true;
}
bool dviRenderer::isValidFile(const TQString& filename) const
{
TQFile 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;
}
bool dviRenderer::setFile(const TQString &fname, const KURL &base)
{
#ifdef DEBUG_DVIRENDERER
kdDebug(4300) << "dviRenderer::setFile( fname='" << fname << "', ref='" << ref << "', sourceMarker=" << sourceMarker << " )" << endl;
#endif
TQMutexLocker lock(&mutex);
TQFileInfo fi(fname);
TQString 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
info->setDVIData(0);
delete dviFile;
dviFile = 0;
return true;
}
// Make sure the file actually exists.
if (!fi.exists() || fi.isDir()) {
KMessageBox::error( parentWidget,
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.
TQString mimetype( KMimeMagic::self()->findFileType( fname )->mimeType() );
if (mimetype != "application/x-dvi") {
KMessageBox::sorry( parentWidget,
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;
}
// Check if the file is a valid DVI file.
if (!isValidFile(filename))
{
KMessageBox::sorry( parentWidget,
i18n("<qt>File corruption! KDVI had trouble interpreting your DVI file. Most "
"likely this means that the DVI file is broken.</qt>")
.arg( fname ) );
return false;
}
TQApplication::setOverrideCursor( waitCursor );
dvifile *dviFile_new = new dvifile(filename, &font_pool);
if ((dviFile == 0) || (dviFile->filename != filename))
dviFile_new->sourceSpecialMarker = true;
else
dviFile_new->sourceSpecialMarker = false;
if ((dviFile_new->dvi_Data() == NULL)||(dviFile_new->errorMsg.isEmpty() != true)) {
TQApplication::restoreOverrideCursor();
if (dviFile_new->errorMsg.isEmpty() != true)
KMessageBox::detailedError(parentWidget,
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;
}
delete dviFile;
dviFile = dviFile_new;
numPages = dviFile->total_pages;
info->setDVIData(dviFile);
_isModified = false;
baseURL = base;
font_pool.setExtraSearchPath( fi.dirPath(true) );
font_pool.setCMperDVIunit( dviFile->getCmPerDVIunit() );
// Extract PostScript from the DVI file, and store the PostScript
// specials in PostScriptDirectory, and the headers in the
// PostScriptHeaderString.
PS_interface->clear();
// If the DVI file comes from a remote URL (e.g. downloaded from a
// web server), we limit the PostScript files that can be accessed
// by this file to the download directory, in order to limit the
// possibilities of a denial of service attack.
TQString includePath;
if (!baseURL.isLocalFile()) {
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();
bookmarks.clear();
prebookmarks.clear();
if (dviFile->page_offset.isEmpty() == true)
return false;
// Locate fonts.
font_pool.locateFonts();
// Update the list of fonts in the info window
if (info != 0)
info->setFontInfo(&font_pool);
// We should pre-scan the document now (to extract embedded,
// PostScript, Hyperlinks, ets).
// PRESCAN STARTS HERE
#ifdef PERFORMANCE_MEASUREMENT
kdDebug(4300) << "Time elapsed till prescan phase starts " << performanceTimer.elapsed() << "ms" << endl;
TQTime preScanTimer;
preScanTimer.start();
#endif
dviFile->numberOfExternalPSFiles = 0;
Q_UINT16 currPageSav = current_page;
prebookmarks.clear();
for(current_page=0; current_page < dviFile->total_pages; current_page++) {
PostScriptOutPutString = new TQString();
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;
prescan(&dviRenderer::prescan_parseSpecials);
if (!PostScriptOutPutString->isEmpty())
PS_interface->setPostScript(current_page, *PostScriptOutPutString);
delete PostScriptOutPutString;
}
PostScriptOutPutString = NULL;
// Generate the list of bookmarks
bookmarks.clear();
TQPtrStack<Bookmark> stack;
stack.setAutoDelete (false);
TQValueVector<PreBookmark>::iterator it;
for( it = prebookmarks.begin(); it != prebookmarks.end(); ++it ) {
Bookmark *bmk = new Bookmark((*it).title, findAnchor((*it).anchorName));
if (stack.isEmpty())
bookmarks.append(bmk);
else {
stack.top()->subordinateBookmarks.append(bmk);
stack.remove();
}
for(int i=0; i<(*it).noOfChildren; i++)
stack.push(bmk);
}
prebookmarks.clear();
#ifdef PERFORMANCE_MEASUREMENT
kdDebug(4300) << "Time required for prescan phase: " << preScanTimer.restart() << "ms" << endl;
#endif
current_page = currPageSav;
// PRESCAN ENDS HERE
pageSizes.resize(0);
if (dviFile->suggestedPageSize != 0) {
// Fill the vector pageSizes with total_pages identical entries
pageSizes.resize(dviFile->total_pages, *(dviFile->suggestedPageSize));
}
TQApplication::restoreOverrideCursor();
return true;
}
Anchor dviRenderer::parseReference(const TQString &reference)
{
mutex.lock();
#ifdef DEBUG_DVIRENDERER
kdError(4300) << "dviRenderer::parseReference( " << reference << " ) called" << endl;
#endif
if (dviFile == 0) {
mutex.unlock();
return Anchor();
}
// 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) {
if (page < 0)
page = 0;
if (page > dviFile->total_pages)
page = dviFile->total_pages;
mutex.unlock();
return Anchor(page, Length() );
}
// 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) {
// Extract the file name and the numeral part from the reference string
DVI_SourceFileSplitter splitter(reference, dviFile->filename);
Q_UINT32 refLineNumber = splitter.line();
TQString refFileName = splitter.filePath();
if (sourceHyperLinkAnchors.isEmpty()) {
KMessageBox::sorry(parentWidget, 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(refLineNumber).arg(refFileName),
i18n("Could Not Find Reference"));
mutex.unlock();
return Anchor();
}
// Go through the list of source file anchors, and find the anchor
// whose line number is the biggest among those that are smaller
// than the refLineNumber. That way, the position in the DVI file
// which is highlighted is always a little further up than the
// position in the editor, e.g. if the DVI file contains
// positional information at the beginning of every paragraph,
// KDVI jumps to the beginning of the paragraph that the cursor is
// in, and never to the next paragraph. If source file anchors for
// the refFileName can be found, but none of their line numbers is
// smaller than the refLineNumber, the reason is most likely, that
// the cursor in the editor stands somewhere in the preamble of
// the LaTeX file. In that case, we jump to the beginning of the
// document.
bool anchorForRefFileFound = false; // Flag that is set if source file anchors for the refFileName could be found at all
TQValueVector<DVI_SourceFileAnchor>::iterator bestMatch = sourceHyperLinkAnchors.end();
TQValueVector<DVI_SourceFileAnchor>::iterator it;
for( it = sourceHyperLinkAnchors.begin(); it != sourceHyperLinkAnchors.end(); ++it )
if (refFileName.stripWhiteSpace() == it->fileName.stripWhiteSpace()
|| refFileName.stripWhiteSpace() == it->fileName.stripWhiteSpace() + ".tex"
) {
anchorForRefFileFound = true;
if ( (it->line <= refLineNumber) &&
( (bestMatch == sourceHyperLinkAnchors.end()) || (it->line > bestMatch->line) ) )
bestMatch = it;
}
if (bestMatch != sourceHyperLinkAnchors.end()) {
mutex.unlock();
return Anchor(bestMatch->page, bestMatch->distance_from_top);
} else
if (anchorForRefFileFound == false)
KMessageBox::sorry(parentWidget, 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(refLineNumber).arg(refFileName),
i18n( "Could Not Find Reference" ));
else {
mutex.unlock();
return Anchor();
}
mutex.unlock();
return Anchor();
}
mutex.unlock();
return Anchor();
}
void dviRenderer::setResolution(double resolution_in_DPI)
{
// Ignore minute changes. The difference to the current value would
// hardly be visible anyway. That saves a lot of re-painting,
// e.g. when the user resizes the window, and a flickery mouse
// changes the window size by 1 pixel all the time.
if (fabs(resolutionInDPI-resolution_in_DPI) < 1)
return;
resolutionInDPI = resolution_in_DPI;
// Pass the information on to the font pool.
font_pool.setDisplayResolution( resolutionInDPI );
shrinkfactor = 1200/resolutionInDPI;
return;
}
void dviRenderer::clearStatusBar()
{
emit setStatusBarText( TQString::null );
}
void dviRenderer::handleSRCLink(const TQString &linkText, TQMouseEvent *e, DocumentWidget *win)
{
#ifdef DEBUG_SPECIAL
RenderedDviPagePixmap* currentDVIPage = dynamic_cast<RenderedDviPagePixmap*> currentlyDrawnPage;
if (currentDVIPage)
{
kdDebug(4300) << "Source hyperlink to " << currentDVIPage->sourceHyperLinkList[i].linkText << endl;
}
#endif
DVI_SourceFileSplitter splitter(linkText, dviFile->filename);
TQString TeXfile = splitter.filePath();
if ( ! splitter.fileExists() )
{
KMessageBox::sorry(parentWidget, TQString("<qt>") +
i18n("The DVI-file refers to the TeX-file "
"<strong>%1</strong> which could not be found.").arg(KShellProcess::quote(TeXfile)) +
TQString("</qt>"),
i18n( "Could Not Find File" ));
return;
}
TQString command = editorCommand;
if (command.isEmpty() == true) {
int r = KMessageBox::warningContinueCancel(parentWidget, TQString("<qt>") +
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.") +
TQString("</qt>"),
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( "%l", TQString::number(splitter.line()) ).replace( "%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, TQT_SIGNAL(receivedStderr(KProcess *, char *, int)), 0, 0);
qApp->disconnect(proc, TQT_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, TQT_SIGNAL(receivedStderr(KProcess *, char *, int)), this, TQT_SLOT(dvips_output_receiver(KProcess *, char *, int)));
qApp->connect(proc, TQT_SIGNAL(receivedStdout(KProcess *, char *, int)), this, TQT_SLOT(dvips_output_receiver(KProcess *, char *, int)));
qApp->connect(proc, TQT_SIGNAL(processExited(KProcess *)), this, TQT_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);
info->clear(i18n("Starting the editor..."));
int flashOffset = e->y(); // Heuristic correction. Looks better.
win->flash(flashOffset);
proc->clearArguments();
*proc << command;
proc->closeStdin();
if (proc->start(KProcess::NotifyOnExit, KProcess::AllOutput) == false) {
kdError(4300) << "Editor failed to start" << endl;
return;
}
}
TQString dviRenderer::PDFencodingToQString(const TQString& _pdfstring)
{
// This method locates special PDF characters in a string and
// replaces them by UTF8. See Section 3.2.3 of the PDF reference
// guide for information.
TQString pdfstring = _pdfstring;
pdfstring = pdfstring.replace("\\n", "\n");
pdfstring = pdfstring.replace("\\r", "\n");
pdfstring = pdfstring.replace("\\t", "\t");
pdfstring = pdfstring.replace("\\f", "\f");
pdfstring = pdfstring.replace("\\(", "(");
pdfstring = pdfstring.replace("\\)", ")");
pdfstring = pdfstring.replace("\\\\", "\\");
// Now replace octal character codes with the characters they encode
int pos;
TQRegExp rx( "(\\\\)(\\d\\d\\d)" ); // matches "\xyz" where x,y,z are numbers
while((pos = rx.search( pdfstring )) != -1) {
pdfstring = pdfstring.replace(pos, 4, TQChar(rx.cap(2).toInt(0,8)));
}
rx.setPattern( "(\\\\)(\\d\\d)" ); // matches "\xy" where x,y are numbers
while((pos = rx.search( pdfstring )) != -1) {
pdfstring = pdfstring.replace(pos, 3, TQChar(rx.cap(2).toInt(0,8)));
}
rx.setPattern( "(\\\\)(\\d)" ); // matches "\x" where x is a number
while((pos = rx.search( pdfstring )) != -1) {
pdfstring = pdfstring.replace(pos, 4, TQChar(rx.cap(2).toInt(0,8)));
}
return pdfstring;
}
#include "dviRenderer.moc"
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