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okular/dviwin.cpp
Stefan Kebekus c9c6982ca1 further implementation of inverse search 
svn path=/trunk/kdegraphics/kdvi/; revision=113404
2001-09-05 15:13:19 +00:00

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//
// Class: dviWindow
//
// Previewer for TeX DVI files.
//
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <setjmp.h>
#include <qbitmap.h>
#include <qfileinfo.h>
#include <qimage.h>
#include <qkeycode.h>
#include <qlabel.h>
#include <qpaintdevice.h>
#include <qpainter.h>
#include <qregexp.h>
#include <qurl.h>
#include <kapp.h>
#include <kmessagebox.h>
#include <kmimemagic.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 "dviwin.h"
#include "fontpool.h"
#include "fontprogress.h"
#include "infodialog.h"
#include "optiondialog.h"
//------ some definitions from xdvi ----------
#include <X11/Xlib.h>
#include <X11/Intrinsic.h>
#define MAXDIM 32767
#define DVI_BUFFER_LEN 512
struct WindowRec mane = {(Window) 0, 3, 0, 0, 0, 0, MAXDIM, 0, MAXDIM, 0};
struct WindowRec currwin = {(Window) 0, 3, 0, 0, 0, 0, MAXDIM, 0, MAXDIM, 0};
extern struct WindowRec alt;
extern unsigned char dvi_buffer[DVI_BUFFER_LEN];
struct drawinf currinf;
const char *dvi_oops_msg; /* error message */
extern struct frame frame0; /* dummy head of list */
jmp_buf dvi_env; /* mechanism to communicate dvi file errors */
QIntDict<font> tn_table;
int _pixels_per_inch; //@@@
// The following are really used
unsigned int page_w;
unsigned int page_h;
// end of "really used"
extern unsigned int page_w, page_h;
Window mainwin;
void draw_page(void);
#include <setjmp.h>
extern jmp_buf dvi_env; /* mechanism to communicate dvi file errors */
QPainter foreGroundPaint; // QPainter used for text
//------ now comes the dviWindow class implementation ----------
dviWindow::dviWindow(double zoom, int mkpk, QWidget *parent, const char *name )
: QWidget( parent, name )
{
#ifdef DEBUG_DVIWIN
kdDebug(4300) << "dviWindow" << endl;
#endif
setBackgroundMode(NoBackground);
setFocusPolicy(QWidget::StrongFocus);
setFocus();
// initialize the dvi machinery
dviFile = 0;
font_pool = new fontPool();
if (font_pool == NULL) {
kdError(4300) << "Could not allocate memory for the font pool." << endl;
exit(-1);
}
connect(font_pool, SIGNAL( setStatusBarText( const QString& ) ), this, SIGNAL( setStatusBarText( const QString& ) ) );
connect(font_pool, SIGNAL(fonts_have_been_loaded()), this, SLOT(drawPage()));
info = new infoDialog(this);
if (info == 0) {
// The info dialog is not vital. Therefore we don't abort if
// something goes wrong here.
kdError(4300) << "Could not allocate memory for the info dialog." << endl;
} else {
qApp->connect(font_pool, SIGNAL(MFOutput(QString)), info, SLOT(outputReceiver(QString)));
qApp->connect(font_pool, SIGNAL(fonts_info(class fontPool *)), info, SLOT(setFontInfo(class fontPool *)));
qApp->connect(font_pool, SIGNAL(new_kpsewhich_run(QString)), info, SLOT(clear(QString)));
}
setMakePK( mkpk );
editorCommand = "";
setMetafontMode( DefaultMFMode ); // that also sets the basedpi
paper_width = 21.0; // set A4 paper as default
paper_height = 27.9;
unshrunk_page_w = int( 21.0 * basedpi/2.54 + 0.5 );
unshrunk_page_h = int( 27.9 * basedpi/2.54 + 0.5 );
PostScriptOutPutString = NULL;
HTML_href = NULL;
mainwin = handle();
mane = currwin;
_postscript = 0;
pixmap = 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 = "";
// Calculate the horizontal resolution of the display device. @@@
// We assume implicitly that the horizontal and vertical resolutions
// agree. This is probably not a safe assumption.
Display *DISP = x11Display();
xres = ((double)(DisplayWidth(DISP,(int)DefaultScreen(DISP)) *25.4) /
DisplayWidthMM(DISP,(int)DefaultScreen(DISP)) );
// Just to make sure that we are never dividing by zero.
if ((xres < 10)||(xres > 1000))
xres = 75.0;
// In principle, this method should never be called with illegal
// values for zoom. In principle.
if (zoom < KViewPart::minZoom/1000.0)
zoom = KViewPart::minZoom/1000.0;
if (zoom > KViewPart::maxZoom/1000.0)
zoom = KViewPart::maxZoom/1000.0;
mane.shrinkfactor = currwin.shrinkfactor = (double)basedpi/(xres*zoom);
_zoom = zoom;
PS_interface = new ghostscript_interface(0.0, 0, 0);
// pass status bar messages through
connect(PS_interface, SIGNAL( setStatusBarText( const QString& ) ), this, SIGNAL( setStatusBarText( const QString& ) ) );
is_current_page_drawn = 0;
// Variables used in animation.
animationCounter = 0;
timerIdent = 0;
resize(0,0);
}
dviWindow::~dviWindow()
{
#ifdef DEBUG_DVIWIN
kdDebug(4300) << "~dviWindow" << endl;
#endif
if (info)
delete info;
delete PS_interface;
if (dviFile)
delete dviFile;
// Don't delete the export printer. This is owned by the
// kdvi_multipage.
export_printer = 0;
}
void dviWindow::showInfo(void)
{
if (info == 0)
return;
info->setDVIData(dviFile);
// Call check_if_fonts_are_loaded() to make sure that the fonts_info
// is emitted. That way, the infoDialog will know about the fonts
// and their status.
font_pool->check_if_fonts_are_loaded();
info->show();
}
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)
{
// 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(sourceFileName.latin1(),"r+");
for(Q_UINT32 i=0; 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(export_tmpFileName.latin1()); // That should delete the file.
export_tmpFileName = "";
}
if (progress != 0) {
progress->hideDialog();
delete progress;
progress = 0;
}
export_printer = 0;
export_fileName = "";
}
void dviWindow::setShowPS( int flag )
{
#ifdef DEBUG_DVIWIN
kdDebug(4300) << "setShowPS" << endl;
#endif
if ( _postscript == flag )
return;
_postscript = flag;
drawPage();
}
void dviWindow::setShowHyperLinks( int flag )
{
if ( _showHyperLinks == flag )
return;
_showHyperLinks = flag;
drawPage();
}
void dviWindow::setMakePK( int flag )
{
makepk = flag;
font_pool->setMakePK(makepk);
}
void dviWindow::setMetafontMode( unsigned int mode )
{
if ((dviFile != NULL) && (mode != font_pool->getMetafontMode()))
KMessageBox::sorry( this,
i18n("The change in Metafont mode will be effective\n"
"only after you start kdvi again!") );
MetafontMode = font_pool->setMetafontMode(mode);
basedpi = MFResolutions[MetafontMode];
_pixels_per_inch = MFResolutions[MetafontMode]; //@@@
#ifdef DEBUG_DVIWIN
kdDebug(4300) << "basedpi " << basedpi << endl;
#endif
}
void dviWindow::setPaper(double w, double h)
{
#ifdef DEBUG_DVIWIN
kdDebug(4300) << "setPaper" << endl;
#endif
paper_width = w;
paper_height = h;
unshrunk_page_w = int( w * basedpi/2.54 + 0.5 );
unshrunk_page_h = int( h * basedpi/2.54 + 0.5 );
page_w = (int)(unshrunk_page_w / mane.shrinkfactor + 0.5) + 2;
page_h = (int)(unshrunk_page_h / mane.shrinkfactor + 0.5) + 2;
font_pool->reset_fonts();
changePageSize();
}
//------ this function calls the dvi interpreter ----------
void dviWindow::drawPage()
{
#ifdef DEBUG_DVIWIN
kdDebug(4300) << "drawPage" << endl;
#endif
setCursor(arrowCursor);
// Stop any animation which may be in progress
if (timerIdent != 0) {
killTimer(timerIdent);
timerIdent = 0;
animationCounter = 0;
}
// Stop if there is no dvi-file present
if ( dviFile == 0 ) {
resize(0, 0);
return;
}
if ( dviFile->file == 0 ) {
resize(0, 0);
return;
}
if ( !pixmap )
return;
if ( !pixmap->paintingActive() ) {
foreGroundPaint.begin( pixmap );
QApplication::setOverrideCursor( waitCursor );
if (setjmp(dvi_env)) { // dvi_oops called
QApplication::restoreOverrideCursor();
foreGroundPaint.end();
KMessageBox::error( this,
i18n("File corruption!\n\n") +
QString::fromUtf8(dvi_oops_msg) +
i18n("\n\nMost likely this means that the DVI file\nis broken, or that it is not a DVI file."));
return;
} else {
draw_page();
}
foreGroundPaint.drawRect(0,0,pixmap->width(),pixmap->height());
QApplication::restoreOverrideCursor();
foreGroundPaint.end();
// @@@ Problem here: KMessageBox doesn't support hyperlinks.
if ((dviFile->sourceSpecialMarker == true) && (num_of_used_source_hyperlinks > 0)) {
dviFile->sourceSpecialMarker = false;
KMessageBox::information(this, 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. See the "
"<a href=\"http://devel-home.kde.org/~kdvi\">KDVI documentation</a> for a more "
"detailed explanation of this."),
QString::null, "KDVI-SourceFileInfoFound", true);
}
}
repaint();
emit contents_changed();
}
bool dviWindow::correctDVI(QString filename)
{
QFile f(filename);
if (!f.open(IO_ReadOnly))
return FALSE;
int n = f.size();
if ( n < 134 ) // Too short for a dvi file
return FALSE;
f.at( n-4 );
char test[4];
unsigned char trailer[4] = { 0xdf,0xdf,0xdf,0xdf };
if ( f.readBlock( test, 4 )<4 || strncmp( test, (char *) trailer, 4 ) )
return FALSE;
// We suppose now that the dvi file is complete and OK
return TRUE;
}
void dviWindow::changePageSize()
{
if ( pixmap && pixmap->paintingActive() )
return;
int old_width = 0;
if (pixmap) {
old_width = pixmap->width();
delete pixmap;
}
pixmap = new QPixmap( (int)page_w, (int)page_h );
pixmap->fill( white );
resize( page_w, page_h );
currwin.win = mane.win = pixmap->handle();
PS_interface->setSize( basedpi/mane.shrinkfactor, page_w, page_h );
drawPage();
}
//------ setup the dvi interpreter (should do more here ?) ----------
bool dviWindow::setFile( const QString & fname )
{
setMouseTracking(true);
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
if (info != 0)
info->setDVIData(0);
if (dviFile)
delete dviFile;
dviFile = 0;
if (pixmap)
delete pixmap;
pixmap = 0;
resize(0, 0);
return true;
}
// Make sure the file actually exists.
if (!fi.exists() || fi.isDir()) {
KMessageBox::error( this,
i18n("File error!\n\n") +
i18n("The file does not exist\n") +
filename);
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 of the multipage.
QString mimetype( KMimeMagic::self()->findFileType( fname )->mimeType() );
if (mimetype != "application/x-dvi") {
KMessageBox::sorry( this,
i18n( "Could not open file <nobr><strong>%1</strong></nobr> which has "
"type <strong>%2</strong>. KDVI can only load DVI (.dvi) files." )
.arg( fname )
.arg( mimetype ) );
return false;
}
QApplication::setOverrideCursor( waitCursor );
if (setjmp(dvi_env)) { // dvi_oops called
QApplication::restoreOverrideCursor();
KMessageBox::error( this,
i18n("File corruption!\n\n") +
QString::fromUtf8(dvi_oops_msg) +
i18n("\n\nMost likely this means that the DVI file\n") +
filename +
i18n("\nis broken, or that it is not a DVI file."));
return false;
}
dvifile *dviFile_new = new dvifile(filename,font_pool);
if (dviFile_new->file == NULL) {
delete dviFile_new;
return false;
}
if (dviFile)
delete dviFile;
dviFile = dviFile_new;
if (info != 0)
info->setDVIData(dviFile);
page_w = (int)(unshrunk_page_w / mane.shrinkfactor + 0.5) + 2;
page_h = (int)(unshrunk_page_h / mane.shrinkfactor + 0.5) + 2;
// Extract PostScript from the DVI file, and store the PostScript
// specials in PostScriptDirectory, and the headers in the
// PostScriptHeaderString.
PS_interface->clear();
// We will also generate a list of hyperlink-anchors in the
// document. So declare the existing list empty.
numAnchors = 0;
for(current_page=0; current_page < dviFile->total_pages; current_page++) {
PostScriptOutPutString = new QString();
(void) lseek(fileno(dviFile->file), dviFile->page_offset[current_page], SEEK_SET);
memset((char *) &currinf.data, 0, sizeof(currinf.data));
currinf.fonttable = tn_table;
currinf.end = dvi_buffer;
currinf.pos = dvi_buffer;
currinf._virtual = NULL;
draw_part(dviFile->dimconv, false);
if (!PostScriptOutPutString->isEmpty())
PS_interface->setPostScript(current_page, *PostScriptOutPutString);
delete PostScriptOutPutString;
}
PostScriptOutPutString = NULL;
is_current_page_drawn = 0;
QApplication::restoreOverrideCursor();
return true;
}
//------ handling pages ----------
void dviWindow::gotoPage(unsigned int new_page)
{
if (dviFile == NULL)
return;
if (new_page<1)
new_page = 1;
if (new_page > dviFile->total_pages)
new_page = dviFile->total_pages;
if ((new_page-1==current_page) && !is_current_page_drawn)
return;
current_page = new_page-1;
is_current_page_drawn = 0;
animationCounter = 0;
drawPage();
}
void dviWindow::gotoPage(int new_page, int vflashOffset)
{
gotoPage(new_page);
animationCounter = 0;
flashOffset = vflashOffset - pixmap->height()/100; // Heuristic correction. Looks better.
timerIdent = startTimer(50); // Start the animation. The animation proceeds in 1/10s intervals
}
void dviWindow::timerEvent( QTimerEvent * )
{
animationCounter++;
if (animationCounter >= 10) {
killTimer(timerIdent);
timerIdent = 0;
animationCounter = 0;
}
repaint();
}
int dviWindow::totalPages()
{
if (dviFile != NULL)
return dviFile->total_pages;
else
return 0;
}
double dviWindow::setZoom(double zoom)
{
// In principle, this method should never be called with illegal
// values. In principle.
if (zoom < KViewPart::minZoom/1000.0)
zoom = KViewPart::minZoom/1000.0;
if (zoom > KViewPart::maxZoom/1000.0)
zoom = KViewPart::maxZoom/1000.0;
mane.shrinkfactor = currwin.shrinkfactor = basedpi/(xres*zoom);
_zoom = zoom;
page_w = (int)(unshrunk_page_w / mane.shrinkfactor + 0.5) + 2;
page_h = (int)(unshrunk_page_h / mane.shrinkfactor + 0.5) + 2;
font_pool->reset_fonts();
changePageSize();
return _zoom;
}
void dviWindow::paintEvent(QPaintEvent *)
{
if (pixmap) {
QPainter p(this);
p.drawPixmap(QPoint(0, 0), *pixmap);
if (animationCounter > 0 && animationCounter < 10) {
int wdt = pixmap->width()/(10-animationCounter);
int hgt = pixmap->height()/((10-animationCounter)*20);
p.setPen(QPen(QColor(150,0,0), 3, DashLine));
p.drawRect((pixmap->width()-wdt)/2, flashOffset, wdt, hgt);
}
}
}
void dviWindow::mouseMoveEvent ( QMouseEvent * e )
{
// If no mouse button pressed
if ( e->state() == 0 ) {
for(int i=0; i<num_of_used_hyperlinks; i++) {
if (hyperLinkList[i].box.contains(e->pos())) {
setCursor(pointingHandCursor);
return;
}
}
setCursor(arrowCursor);
}
}
void dviWindow::mousePressEvent ( QMouseEvent * e )
{
#ifdef DEBUG_SPECIAL
kdDebug(4300) << "mouse event" << endl;
#endif
// Check if the mouse is pressed on a regular hyperlink
if ((e->button() == LeftButton) && (num_of_used_hyperlinks > 0))
for(int i=0; i<num_of_used_hyperlinks; i++) {
if (hyperLinkList[i].box.contains(e->pos())) {
if (hyperLinkList[i].linkText[0] == '#' ) {
#ifdef DEBUG_SPECIAL
kdDebug(4300) << "hit: local link to " << hyperLinkList[i].linkText << endl;
#endif
QString locallink = hyperLinkList[i].linkText.mid(1); // Drop the '#' at the beginning
for(int j=0; j<numAnchors; j++) {
if (locallink.compare(AnchorList_String[j]) == 0) {
#ifdef DEBUG_SPECIAL
kdDebug(4300) << "hit: local link to y=" << AnchorList_Vert[j] << endl;
kdDebug(4300) << "hit: local link to sf=" << mane.shrinkfactor << endl;
#endif
emit(request_goto_page(AnchorList_Page[j], (int)(AnchorList_Vert[j]/mane.shrinkfactor)));
break;
}
}
} else {
#ifdef DEBUG_SPECIAL
kdDebug(4300) << "hit: external link to " << hyperLinkList[i].linkText << endl;
#endif
// We could in principle use KIO::Netaccess::run() here, but
// it is perhaps not a very good idea to allow a DVI-file to
// specify arbitrary commands, such as "rm -rvf /*". Using
// the kfmclient seems to be MUCH safer.
QUrl DVI_Url(dviFile->filename);
QUrl Link_Url(DVI_Url, hyperLinkList[i].linkText, TRUE );
KShellProcess proc;
proc << "kfmclient openURL " << Link_Url.toString();
proc.start(KProcess::Block);
}
break;
}
}
// Check if the mouse is pressed on a source-hyperlink
if ((e->button() == MidButton) && (num_of_used_source_hyperlinks > 0))
for(int i=0; i<num_of_used_source_hyperlinks; i++)
if (sourceHyperLinkList[i].box.contains(e->pos())) {
#ifdef DEBUG_SPECIAL
kdDebug(4300) << "Source hyperlink to " << sourceHyperLinkList[i].linkText << endl;
#endif
QString cp = sourceHyperLinkList[i].linkText;
int max = cp.length();
int i;
for(i=0; i<max; i++)
if (cp[i].isDigit() == false)
break;
// The macro-package srcltx gives a special like "src:99 test.tex"
// while MikTeX gives "src:99test.tex". KDVI tries
// to understand both.
QFileInfo fi1(dviFile->filename);
QFileInfo fi2(fi1.dir(),cp.mid(i+1));
QString TeXfile;
if ( fi2.exists() )
TeXfile = fi2.absFilePath();
else {
QFileInfo fi3(fi1.dir(),cp.mid(i));
TeXfile = fi3.absFilePath();
if ( !fi3.exists() ) {
KMessageBox::sorry(this, i18n("The DVI-file refers to the TeX-file "
"<strong>%1</strong> which could not be found.").arg(KShellProcess::quote(TeXfile)),
i18n( "Could not find file" ));
return;
}
}
QString command = editorCommand;
if (command.isEmpty() == true) {
int r = KMessageBox::warningContinueCancel(this, i18n("You have not yet specified an editor for inverse search. "
"Please choose your favourite editor in the "
"<strong>DVI options dialog</strong> "
"which you will find in the <strong>Settings</strong>-menu."),
"Need to specify editor",
"Use KDE's editor kate for now");
if (r == KMessageBox::Continue)
command = "kate %f";
else
return;
}
command = command.replace( QRegExp("%l"), cp.left(i) ).replace( QRegExp("%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/><nobr><tt>%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 of KDVI contains a detailed explanation how to set up your editor for use with KDVI, "
"and a list of common problems.</qt>").arg(command);
if (info)
info->clear(i18n("Starting the editor..."));
proc->clearArguments();
*proc << command;
proc->closeStdin();
if (proc->start(KProcess::NotifyOnExit, KProcess::AllOutput) == false) {
kdError(4300) << "Editor failed to start" << endl;
return;
}
}
}
#include "dviwin.moc"
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