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okular/dviwin.cpp

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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 <qurl.h>
#include <kapp.h>
#include <kmessagebox.h>
#include <kdebug.h>
#include <kfiledialog.h>
#include <kio/job.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
extern struct frame *current_frame;
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 */
double dimconv;
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; //@@@
_Xconst char *_paper;
// The following are really used
long magnification;
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 */
double xres;
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);
}
qApp->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 );
setMetafontMode( DefaultMFMode ); // that also sets the basedpi
unshrunk_paper_w = int( 21.0 * basedpi/2.54 + 0.5 ); // set A4 paper as default
unshrunk_paper_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.
proc = 0;
progress = 0;
export_printer = 0;
export_fileName = "";
// 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);
is_current_page_drawn = 0;
// Variables used in animation.
animationCounter = 0;
timerIdent = 0;
resize(0,0);
//@@@ setMouseTracking(true);
}
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)
{
// Should not happen since the progressDialog is modal... but who
// knows?
if (proc != 0) {
KMessageBox::sorry(0, i18n("Another export command is currently running"));
return;
}
// 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 dvipdf to finish..."),
this, "dvipdf 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->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 *)));
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)
{
// Should not happen since the progressDialog is modal... but who
// knows?
if (proc != 0) {
KMessageBox::sorry(0, i18n("Another export command is currently running"));
return;
}
// 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)));
}
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(processExited(KProcess *)),
this, SLOT(dvips_terminated(KProcess *)));
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)));
*proc << "-z"; // export Hyperlinks
if (options.isEmpty() == false)
*proc << options;
*proc << QString("%1").arg(KShellProcess::quote(dviFile->filename));
*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::abortExternalProgramm(void)
{
if (proc != 0) {
delete proc; // Deleting the KProcess kills the child.
proc = 0;
}
if (progress != 0) {
progress->hideDialog();
delete progress;
progress = 0;
}
export_printer = 0;
export_fileName = "";
}
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 *)
{
if ((proc->normalExit() == true) && (proc->exitStatus() != 0))
KMessageBox::error( this,
i18n("The external program used to export the DVI-file\n"
"reported an error. You might wish to look at the\n"
"document info dialog for a precise error report.") );
// If a printer is defined, print and delete the output file.
if (export_printer != 0)
export_printer->printFiles( QStringList(export_fileName), true );
// Kill and delete the remaining process, reset the printer, etc.
abortExternalProgramm();
}
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
unshrunk_paper_w = int( w * basedpi/2.54 + 0.5 );
unshrunk_paper_h = int( h * basedpi/2.54 + 0.5 );
unshrunk_page_w = unshrunk_paper_w;
unshrunk_page_h = unshrunk_paper_h;
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;
}
if (dviFile == NULL) {
resize(0, 0);
return;
}
if ( dviFile->file == NULL) {
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();
}
QApplication::restoreOverrideCursor();
foreGroundPaint.end();
}
resize(pixmap->width(), pixmap->height());
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;
}
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(current_frame = &frame0, dimconv);
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(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
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
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);
//@@@ Set up a warning requester if the command failed?
}
break;
}
}
}
#include "dviwin.moc"