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source code cleanup

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svn path=/trunk/kdegraphics/kdvi/; revision=125126
remotes/origin/kdvi-3.0
Stefan Kebekus 25 years ago
parent a0ed2caf2a
commit e992c8a99c
1 changed files with 441 additions and 0 deletions
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  1. 441
      dviwin_export.cpp

441
dviwin_export.cpp
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//
// 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 <kapplication.h>
#include <kmessagebox.h>
#include <kdebug.h>
#include <kfiledialog.h>
#include <kio/job.h>
#include <kio/netaccess.h>
#include <klocale.h>
#include <kprinter.h>
#include <kprocess.h>
#include <qpainter.h>
#include <qprogressdialog.h>
#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("<qt>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.</qt>"),
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; i<num_of_used_textlinks; i++)
stream << textLinkList[i].linkText << endl;
}
// Switch off the progress dialog, etc.
progress.setProgress( dviFile->total_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("<qt>The external program 'dvipdf', which was used to export the file, 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.</qt>") ;
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 <strong>%1</strong> to the temporary file <strong>%2</strong>. "
"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 <strong>document info dialog</strong> 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 = "";
}
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