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authortoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
committertoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
commit47d455dd55be855e4cc691c32f687f723d9247ee (patch)
tree52e236aaa2576bdb3840ebede26619692fed6d7d /kdvi/dviRenderer.cpp
downloadtdegraphics-47d455dd55be855e4cc691c32f687f723d9247ee.tar.gz
tdegraphics-47d455dd55be855e4cc691c32f687f723d9247ee.zip
Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.
BUG:215923 git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdegraphics@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
Diffstat (limited to 'kdvi/dviRenderer.cpp')
-rw-r--r--kdvi/dviRenderer.cpp839
1 files changed, 839 insertions, 0 deletions
diff --git a/kdvi/dviRenderer.cpp b/kdvi/dviRenderer.cpp
new file mode 100644
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+++ b/kdvi/dviRenderer.cpp
@@ -0,0 +1,839 @@
+//
+// 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 <qcheckbox.h>
+#include <qclipboard.h>
+#include <qcursor.h>
+#include <qlabel.h>
+#include <qfileinfo.h>
+#include <qlayout.h>
+#include <qmessagebox.h>
+#include <qpaintdevice.h>
+#include <qpainter.h>
+#include <qptrstack.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 <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
+
+QPainter *foreGroundPainter; // QPainter used for text
+
+
+//------ now comes the dviRenderer class implementation ----------
+
+dviRenderer::dviRenderer(QWidget *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, SIGNAL( setStatusBarText( const QString& ) ), this, SIGNAL( setStatusBarText( const QString& ) ) );
+
+ parentWidget = par;
+ shrinkfactor = 3;
+ current_page = 0;
+ resolutionInDPI = 0.0;
+
+ connect( &clearStatusBarTimer, SIGNAL(timeout()), this, 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, SIGNAL( setStatusBarText( const QString& ) ), this, SIGNAL( setStatusBarText( const QString& ) ) );
+}
+
+
+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 QString &str_editorCommand, bool useFontHints )
+{
+ QMutexLocker 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;
+
+ QApplication::setOverrideCursor( waitCursor );
+ foreGroundPainter = page->getPainter();
+ if (foreGroundPainter != 0) {
+ errorMsg = QString::null;
+ draw_page();
+ page->returnPainter(foreGroundPainter);
+ }
+ QApplication::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 = QString::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
+ QTimer::singleShot( 0, this, 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() );
+
+ 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();
+ }
+}
+
+
+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"), QString::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 = QString::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 = QString::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>",
+ QString::null, "embeddingDone");
+
+ // Prescan phase starts here
+#ifdef PERFORMANCE_MEASUREMENT
+ kdDebug(4300) << "Time elapsed till prescan phase starts " << performanceTimer.elapsed() << "ms" << endl;
+ QTime preScanTimer;
+ preScanTimer.start();
+#endif
+ dviFile->numberOfExternalPSFiles = 0;
+ prebookmarks.clear();
+ 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;
+
+ 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 QString& filename) const
+{
+ 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;
+}
+
+
+bool dviRenderer::setFile(const QString &fname, const KURL &base)
+{
+#ifdef DEBUG_DVIRENDERER
+ kdDebug(4300) << "dviRenderer::setFile( fname='" << fname << "', ref='" << ref << "', sourceMarker=" << sourceMarker << " )" << endl;
+#endif
+
+ QMutexLocker lock(&mutex);
+
+ 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
+ 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.
+ QString 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;
+ }
+
+ QApplication::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)) {
+ QApplication::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.
+ QString 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;
+ QTime 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 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;
+ prescan(&dviRenderer::prescan_parseSpecials);
+
+ if (!PostScriptOutPutString->isEmpty())
+ PS_interface->setPostScript(current_page, *PostScriptOutPutString);
+ delete PostScriptOutPutString;
+ }
+ PostScriptOutPutString = NULL;
+
+ // Generate the list of bookmarks
+ bookmarks.clear();
+ QPtrStack<Bookmark> stack;
+ stack.setAutoDelete (false);
+ QValueVector<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));
+ }
+
+ QApplication::restoreOverrideCursor();
+ return true;
+}
+
+
+Anchor dviRenderer::parseReference(const QString &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();
+ QString 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
+
+ QValueVector<DVI_SourceFileAnchor>::iterator bestMatch = sourceHyperLinkAnchors.end();
+ QValueVector<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( QString::null );
+}
+
+
+void dviRenderer::handleSRCLink(const QString &linkText, QMouseEvent *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);
+ QString TeXfile = splitter.filePath();
+ if ( ! splitter.fileExists() )
+ {
+ KMessageBox::sorry(parentWidget, QString("<qt>") +
+ i18n("The DVI-file refers to the TeX-file "
+ "<strong>%1</strong> which could not be found.").arg(KShellProcess::quote(TeXfile)) +
+ QString("</qt>"),
+ i18n( "Could Not Find File" ));
+ return;
+ }
+
+ QString command = editorCommand;
+ if (command.isEmpty() == true) {
+ int r = KMessageBox::warningContinueCancel(parentWidget, QString("<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.") +
+ QString("</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", QString::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, 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);
+
+ 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;
+ }
+}
+
+
+QString dviRenderer::PDFencodingToQString(const QString& _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.
+ QString 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;
+ QRegExp rx( "(\\\\)(\\d\\d\\d)" ); // matches "\xyz" where x,y,z are numbers
+ while((pos = rx.search( pdfstring )) != -1) {
+ pdfstring = pdfstring.replace(pos, 4, QChar(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, QChar(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, QChar(rx.cap(2).toInt(0,8)));
+ }
+ return pdfstring;
+}
+
+
+#include "dviRenderer.moc"