From e992c8a99c106fdb4d9bce3c827f14b689e58eeb Mon Sep 17 00:00:00 2001 From: Stefan Kebekus Date: Sun, 2 Dec 2001 14:32:50 +0000 Subject: [PATCH] source code cleanup svn path=/trunk/kdegraphics/kdvi/; revision=125126 --- dviwin_export.cpp | 441 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 441 insertions(+) create mode 100644 dviwin_export.cpp diff --git a/dviwin_export.cpp b/dviwin_export.cpp new file mode 100644 index 000000000..544c97ce8 --- /dev/null +++ b/dviwin_export.cpp @@ -0,0 +1,441 @@ +// +// Class: dviWindow +// +// 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\n" + "absolutely needed by the export function. You can, however, convert\n" + "the DVI-file to PDF using the print function of KDVI, but that will often\n" + "produce which print ok, but are of inferior quality if viewed in the \n" + "Acrobat Reader. It may be wise to upgrade to a more recent version of your\n" + "TeX distribution which includes the 'dvipdfm' program.\n\n" + "Hint to the perplexed system administrator: KDVI uses the shell's PATH variable\n" + "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 = ""; +}