// // Class: dviWindow // Author: Stefan Kebekus // // (C) 2001, Stefan Kebekus. // // Previewer for TeX DVI files. // // This program is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License as // published by the Free Software Foundation; either version 2 of the // License, or (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA // 02111-1307, USA. // // Please report bugs or improvements, etc. via the "Report bug"-Menu // of kdvi. #include #include #include #include #include #include #include #include #include #include #include #include "dviwin.h" #include "fontprogress.h" #include "infodialog.h" extern QPainter foreGroundPaint; // QPainter used for text void dviWindow::exportText(void) { // That sould also not happen. if (dviFile == NULL) return; if (dviFile->dvi_Data == 0 ) return; if (pixmap->paintingActive()) return; if (KMessageBox::warningContinueCancel( this, i18n("This function exports the DVI file to a plain text. Unfortunately, this version of " "KDVI treats only plain ASCII characters properly. Symbols, ligatures, mathematical " "formulae, accented characters, and non-english text, such as Russian or Korean, will " "most likely be messed up completely."), i18n("Function May Not Work as Expected"), i18n("Continue anyway"), "warning_export_to_text_may_not_work") == KMessageBox::Cancel) return; QString fileName = KFileDialog::getSaveFileName(QString::null, "*.txt|Plain Text (Latin 1) (*.txt)", this, i18n("Export File As")); if (fileName.isEmpty()) return; QFileInfo finfo(fileName); if (finfo.exists()) { int r = KMessageBox::warningYesNo (this, QString(i18n("The file %1\nexists. Shall I overwrite that file?")).arg(fileName), i18n("Overwrite file")); if (r == KMessageBox::No) return; } QFile textFile(fileName); textFile.open( IO_WriteOnly ); QTextStream stream( &textFile ); bool _postscript_sav = _postscript; int current_page_sav = current_page; _postscript = FALSE; // Switch off postscript to speed up things... QProgressDialog progress( i18n("Exporting to text..."), i18n("Abort"), dviFile->total_pages, this, "export_text_progress", TRUE ); progress.setMinimumDuration(300); QPixmap pixie(1,1); for(current_page=0; current_page < dviFile->total_pages; current_page++) { progress.setProgress( current_page ); // Funny. The manual to QT tells us that we need to call // qApp->processEvents() regularly to keep the application from // freezing. However, the application crashes immediately if we // uncomment the following line and works just fine as it is. Wild // guess: Could that be related to the fact that we are linking // agains qt-mt? // qApp->processEvents(); if ( progress.wasCancelled() ) break; foreGroundPaint.begin( &pixie ); draw_page(); // We gracefully ingore any errors (bad dvi-file, etc.) which may occur during draw_page() foreGroundPaint.end(); for(int i=0; itotal_pages ); // Restore the PostScript setting _postscript = _postscript_sav; // Restore the current page. current_page = current_page_sav; foreGroundPaint.begin( &pixie ); draw_page(); // We gracefully ingore any errors (bad dvi-file, etc.) which may occur during draw_page() foreGroundPaint.end(); return; } void dviWindow::exportPDF(void) { // It could perhaps happen that a kShellProcess, which runs an // editor for inverse search, is still running. In that case, we // ingore any further output of the editor by detaching the // appropriate slots. The sigal "processExited", however, remains // attached to the slow "exportCommand_terminated", which is smart // enough to ignore the exit status of the editor if another command // has been called meanwhile. See also the exportPS method. if (proc != 0) { // Make sure all further output of the programm is ignored qApp->disconnect(proc, SIGNAL(receivedStderr(KProcess *, char *, int)), 0, 0); qApp->disconnect(proc, SIGNAL(receivedStdout(KProcess *, char *, int)), 0, 0); proc = 0; } // That sould also not happen. if (dviFile == NULL) return; // Is the dvipdfm-Programm available ?? QStringList texList = QStringList::split(":", QString::fromLocal8Bit(getenv("PATH"))); bool found = false; for (QStringList::Iterator it=texList.begin(); it!=texList.end(); ++it) { QString temp = (*it) + "/" + "dvipdfm"; if (QFile::exists(temp)) { found = true; break; } } if (found == false) { KMessageBox::sorry(0, i18n("KDVI could not locate the program 'dvipdfm' on your computer. That program is " "absolutely needed by the export function. You can, however, convert " "the DVI-file to PDF using the print function of KDVI, but that will often " "produce files which print ok, but are of inferior quality if viewed in the " "Acrobat Reader. It may be wise to upgrade to a more recent version of your " "TeX distribution which includes the 'dvipdfm' program.\n" "Hint to the perplexed system administrator: KDVI uses the shell's PATH variable " "when looking for programs.")); return; } QString fileName = KFileDialog::getSaveFileName(QString::null, "*.pdf|Portable Document Format (*.pdf)", this, i18n("Export File As")); if (fileName.isEmpty()) return; QFileInfo finfo(fileName); if (finfo.exists()) { int r = KMessageBox::warningYesNo (this, QString(i18n("The file %1\nexists. Shall I overwrite that file?")).arg(fileName), i18n("Overwrite file")); if (r == KMessageBox::No) return; } // Initialize the progress dialog progress = new fontProgressDialog( QString::null, i18n("Using dvipdfm to export the file to PDF"), QString::null, i18n("KDVI is currently using the external program 'dvipdfm' to " "convert your DVI-file to PDF. Sometimes that can take " "a while because dvipdfm needs to generate its own bitmap fonts " "Please be patient."), i18n("Waiting for dvipdfm to finish..."), this, "dvipdfm progress dialog", false ); if (progress != 0) { progress->TextLabel2->setText( i18n("Please be patient") ); progress->setTotalSteps( dviFile->total_pages ); qApp->connect(progress, SIGNAL(finished(void)), this, SLOT(abortExternalProgramm(void))); } proc = new KShellProcess(); if (proc == 0) { kdError(4300) << "Could not allocate ShellProcess for the dvipdfm command." << endl; return; } qApp->disconnect( this, SIGNAL(mySignal()), 0, 0 ); qApp->connect(proc, SIGNAL(receivedStderr(KProcess *, char *, int)), this, SLOT(dvips_output_receiver(KProcess *, char *, int))); qApp->connect(proc, SIGNAL(receivedStdout(KProcess *, char *, int)), this, SLOT(dvips_output_receiver(KProcess *, char *, int))); qApp->connect(proc, SIGNAL(processExited(KProcess *)), this, SLOT(dvips_terminated(KProcess *))); export_errorString = i18n("The external program 'dvipdf', which was used to export the file, 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.") ; if (info) info->clear(QString(i18n("Export: %1 to PDF")).arg(KShellProcess::quote(dviFile->filename))); proc->clearArguments(); finfo.setFile(dviFile->filename); *proc << QString("cd %1; dvipdfm").arg(KShellProcess::quote(finfo.dirPath(true))); *proc << QString("-o %1").arg(KShellProcess::quote(fileName)); *proc << KShellProcess::quote(dviFile->filename); proc->closeStdin(); if (proc->start(KProcess::NotifyOnExit, KProcess::AllOutput) == false) { kdError(4300) << "dvipdfm failed to start" << endl; return; } return; } void dviWindow::exportPS(QString fname, QString options, KPrinter *printer) { // Safety check. if (dviFile->page_offset == 0) return; // It could perhaps happen that a kShellProcess, which runs an // editor for inverse search, is still running. In that case, we // ingore any further output of the editor by detaching the // appropriate slots. The sigal "processExited", however, remains // attached to the slow "exportCommand_terminated", which is smart // enough to ignore the exit status of the editor if another command // has been called meanwhile. See also the exportPDF method. 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; } // That sould also not happen. if (dviFile == NULL) return; QString fileName; if (fname.isEmpty()) { fileName = KFileDialog::getSaveFileName(QString::null, "*.ps|PostScript (*.ps)", this, i18n("Export File As")); if (fileName.isEmpty()) return; QFileInfo finfo(fileName); if (finfo.exists()) { int r = KMessageBox::warningYesNo (this, QString(i18n("The file %1\nexists. Shall I overwrite that file?")).arg(fileName), i18n("Overwrite file")); if (r == KMessageBox::No) return; } } else fileName = fname; export_fileName = fileName; export_printer = printer; // Initialize the progress dialog progress = new fontProgressDialog( QString::null, i18n("Using dvips to export the file to PostScript"), QString::null, i18n("KDVI is currently using the external program 'dvips' to " "convert your DVI-file to PostScript. Sometimes that can take " "a while because dvips needs to generate its own bitmap fonts " "Please be patient."), i18n("Waiting for dvips to finish..."), this, "dvips progress dialog", false ); if (progress != 0) { progress->TextLabel2->setText( i18n("Please be patient") ); progress->setTotalSteps( dviFile->total_pages ); qApp->connect(progress, SIGNAL(finished(void)), this, SLOT(abortExternalProgramm(void))); } // There is a major problem with dvips, at least 5.86 and lower: the // arguments of the option "-pp" refer to TeX-pages, not to // sequentially numbered pages. For instance "-pp 7" may refer to 3 // or more pages: one page "VII" in the table of contents, a page // "7" in the text body, and any number of pages "7" in various // appendices, indices, bibliographies, and so forth. KDVI currently // uses the following disgusting workaround: if the "options" // variable is used, the DVI-file is copied to a temporary file, and // all the page numbers are changed into a sequential ordering // (using UNIX files, and taking manually care of CPU byte // ordering). Finally, dvips is then called with the new file, and // the file is afterwards deleted. Isn't that great? // Sourcefile is the name of the DVI which is used by dvips, either // the original file, or a temporary file with a new numbering. QString sourceFileName = dviFile->filename; if (options.isEmpty() == false) { // Get a name for a temporary file. KTempFile export_tmpFile; export_tmpFileName = export_tmpFile.name(); export_tmpFile.unlink(); sourceFileName = export_tmpFileName; if (KIO::NetAccess::copy(dviFile->filename, sourceFileName)) { int wordSize; bool bigEndian; qSysInfo (&wordSize, &bigEndian); // Proper error handling? We don't care. FILE *f = fopen(QFile::encodeName(sourceFileName),"r+"); for(Q_UINT32 i=1; i<=dviFile->total_pages; i++) { fseek(f,dviFile->page_offset[i-1]+1, SEEK_SET); // Write the page number to the file, taking good care of byte // orderings. Hopefully QT will implement random access QFiles // soon. if (bigEndian) { fwrite(&i, sizeof(Q_INT32), 1, f); fwrite(&i, sizeof(Q_INT32), 1, f); fwrite(&i, sizeof(Q_INT32), 1, f); fwrite(&i, sizeof(Q_INT32), 1, f); } else { Q_UINT8 anum[4]; Q_UINT8 *bnum = (Q_UINT8 *)&i; anum[0] = bnum[3]; anum[1] = bnum[2]; anum[2] = bnum[1]; anum[3] = bnum[0]; fwrite(anum, sizeof(Q_INT32), 1, f); fwrite(anum, sizeof(Q_INT32), 1, f); fwrite(anum, sizeof(Q_INT32), 1, f); fwrite(anum, sizeof(Q_INT32), 1, f); } } fclose(f); } else { KMessageBox::error(this, i18n("Failed to copy the DVI-file %1 to the temporary file %2. " "The export or print command is aborted.").arg(dviFile->filename).arg(sourceFileName)); return; } } // Allocate and initialize the shell process. proc = new KShellProcess(); if (proc == 0) { kdError(4300) << "Could not allocate ShellProcess for the dvips command." << endl; return; } qApp->connect(proc, SIGNAL(receivedStderr(KProcess *, char *, int)), this, SLOT(dvips_output_receiver(KProcess *, char *, int))); qApp->connect(proc, SIGNAL(receivedStdout(KProcess *, char *, int)), this, SLOT(dvips_output_receiver(KProcess *, char *, int))); qApp->connect(proc, SIGNAL(processExited(KProcess *)), this, SLOT(dvips_terminated(KProcess *))); export_errorString = i18n("The external program 'dvips', which was used to export the file, 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.") ; if (info) info->clear(QString(i18n("Export: %1 to PostScript")).arg(KShellProcess::quote(dviFile->filename))); proc->clearArguments(); QFileInfo finfo(dviFile->filename); *proc << QString("cd %1; dvips").arg(KShellProcess::quote(finfo.dirPath(true))); if (printer == 0) *proc << "-z"; // export Hyperlinks if (options.isEmpty() == false) *proc << options; *proc << QString("%1").arg(KShellProcess::quote(sourceFileName)); *proc << QString("-o %1").arg(KShellProcess::quote(fileName)); proc->closeStdin(); if (proc->start(KProcess::NotifyOnExit, KProcess::Stderr) == false) { kdError(4300) << "dvips failed to start" << endl; return; } return; } void dviWindow::dvips_output_receiver(KProcess *, char *buffer, int buflen) { // Paranoia. if (buflen < 0) return; QString op = QString::fromLocal8Bit(buffer, buflen); if (info != 0) info->outputReceiver(op); if (progress != 0) progress->show(); } void dviWindow::dvips_terminated(KProcess *sproc) { // Give an error message from the message string. However, if the // sproc is not the "current external process of interest", i.e. not // the LAST external program that was started by the user, then the // export_errorString, does not correspond to sproc. In that case, // we ingore the return status silently. if ((proc == sproc) && (sproc->normalExit() == true) && (sproc->exitStatus() != 0)) KMessageBox::error( this, export_errorString ); if (export_printer != 0) export_printer->printFiles( QStringList(export_fileName), true ); // Kill and delete the remaining process, reset the printer, etc. abortExternalProgramm(); } void dviWindow::editorCommand_terminated(KProcess *sproc) { // Give an error message from the message string. However, if the // sproc is not the "current external process of interest", i.e. not // the LAST external program that was started by the user, then the // export_errorString, does not correspond to sproc. In that case, // we ingore the return status silently. if ((proc == sproc) && (sproc->normalExit() == true) && (sproc->exitStatus() != 0)) KMessageBox::error( this, export_errorString ); // Let's hope that this is not all too nasty... killing a // KShellProcess from a slot that was called from the KShellProcess // itself. Until now, there weren't any problems. // Perhaps it was a bad idea, after all. //@@@@ delete sproc; } void dviWindow::abortExternalProgramm(void) { if (proc != 0) { delete proc; // Deleting the KProcess kills the child. proc = 0; } if (export_tmpFileName.isEmpty() != true) { unlink(QFile::encodeName(export_tmpFileName)); // That should delete the file. export_tmpFileName = ""; } if (progress != 0) { progress->hideDialog(); delete progress; progress = 0; } export_printer = 0; export_fileName = ""; }