// // 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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( tqparent=" << 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 = TQt::black; TQApplication::setOverrideCursor( waitCursor ); foreGroundPainter = page->getPainter(); if (foreGroundPainter != 0) { errorMsg = TQString(); draw_page(); page->returnPainter(foreGroundPainter); } TQApplication::restoreOverrideCursor(); page->isEmpty = false; if (errorMsg.isEmpty() != true) { KMessageBox::detailedError(parentWidget, i18n("File corruption! KDVI had trouble interpreting your DVI file. Most " "likely this means that the DVI file is broken."), errorMsg, i18n("DVI File Error")); errorMsg = TQString(); 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(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("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."), contents); label2->setMinimumSize(label2->tqsizeHint()); 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(), 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; TQ_UINT16 currPageSav = current_page; errorMsg = TQString(); 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 = "" + errorMsg + ""; KMessageBox::detailedError(parentWidget, "" + i18n("Not all PostScript files could be embedded into your document.") + "", errorMsg); errorMsg = TQString(); } else KMessageBox::information(parentWidget, "" + i18n("All external PostScript files were embedded into your document. You " "will probably want to save the DVI file now.") + "", TQString(), "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("File error. The specified file '%1' does not exist. " "KDVI already tried to add the ending '.dvi'.").tqarg(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( "Could not open file %1 which has " "type %2. KDVI can only load DVI (.dvi) files." ) .tqarg( fname ) .tqarg( mimetype ) ); return false; } // Check if the file is a valid DVI file. if (!isValidFile(filename)) { KMessageBox::sorry( parentWidget, i18n("File corruption! KDVI had trouble interpreting your DVI file. Most " "likely this means that the DVI file is broken.") .tqarg( 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("File corruption! KDVI had trouble interpreting your DVI file. Most " "likely this means that the DVI file is broken."), 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; TQ_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 stack; stack.setAutoDelete (false); TQValueVector::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); TQ_UINT32 refLineNumber = splitter.line(); TQString refFileName = splitter.filePath(); if (sourceHyperLinkAnchors.isEmpty()) { KMessageBox::sorry(parentWidget, i18n("You have asked KDVI to locate the place in the DVI file which corresponds to " "line %1 in the TeX-file %2. 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.").tqarg(refLineNumber).tqarg(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::iterator bestMatch = sourceHyperLinkAnchors.end(); TQValueVector::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("KDVI was not able to locate the place in the DVI file which corresponds to " "line %1 in the TeX-file %2.").tqarg(refLineNumber).tqarg(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() ); } void dviRenderer::handleSRCLink(const TQString &linkText, TQMouseEvent *e, DocumentWidget *win) { #ifdef DEBUG_SPECIAL RenderedDviPagePixmap* currentDVIPage = dynamic_cast 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("") + i18n("The DVI-file refers to the TeX-file " "%1 which could not be found.").tqarg(KShellProcess::quote(TeXfile)) + TQString(""), i18n( "Could Not Find File" )); return; } TQString command = editorCommand; if (command.isEmpty() == true) { int r = KMessageBox::warningContinueCancel(parentWidget, TQString("") + i18n("You have not yet specified an editor for inverse search. " "Please choose your favorite editor in the " "DVI options dialog " "which you will find in the Settings-menu.") + TQString(""), 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) { tqApp->disconnect(proc, TQT_SIGNAL(receivedStderr(KProcess *, char *, int)), 0, 0); tqApp->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; } tqApp->connect(proc, TQT_SIGNAL(receivedStderr(KProcess *, char *, int)), this, TQT_SLOT(dvips_output_receiver(KProcess *, char *, int))); tqApp->connect(proc, TQT_SIGNAL(receivedStdout(KProcess *, char *, int)), this, TQT_SLOT(dvips_output_receiver(KProcess *, char *, int))); tqApp->connect(proc, TQT_SIGNAL(processExited(KProcess *)), this, TQT_SLOT(editorCommand_terminated(KProcess *))); // Merge the editor-specific editor message here. export_errorString = i18n("The external program

%1

which was used to call the editor " "for inverse search, reported an error. You might wish to look at the document info " "dialog 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.
").tqarg(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::PDFencodingToTQString(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"