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/* vi: ts=8 sts=4 sw=4
*
*
* This file is part of the KDE libraries.
* Copyright (C) 1999,2000 Geert Jansen <jansen@kde.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* Shared pixmap client for KDE.
*/
#include "config.h"
#include <tqrect.h>
#include <tqsize.h>
#include <tqstring.h>
#include <tqpixmap.h>
#include <tqwindowdefs.h>
#include <tqwidget.h>
#ifdef Q_WS_X11
#include <kapplication.h>
#include <krootprop.h>
#include <ksharedpixmap.h>
#include <kdebug.h>
#include <stdlib.h> // for abs
#include <X11/Xlib.h>
// Make sure to include all this X-based shit before we clean up the mess.
// Needed for --enable-final. Not needed by this file itself!
#include <X11/Xutil.h>
#ifdef HAVE_MITSHM
#include <X11/extensions/XShm.h>
#endif
#include <netwm.h>
// Clean up the mess
#undef Bool
#undef Above
#undef Below
#undef KeyPress
#undef KeyRelease
#undef FocusOut
/**
* KSharedPixmap
*/
class KSharedPixmapPrivate
{
public:
Atom pixmap;
Atom target;
Atom selection;
TQRect rect;
};
KSharedPixmap::KSharedPixmap()
: TQWidget(0L, "shpixmap comm window")
{
d = new KSharedPixmapPrivate;
init();
}
KSharedPixmap::~KSharedPixmap()
{
delete d;
}
void KSharedPixmap::init()
{
d->pixmap = XInternAtom(qt_xdisplay(), "PIXMAP", false);
TQCString atom;
atom.sprintf("target prop for window %lx", static_cast<unsigned long int>(winId()));
d->target = XInternAtom(qt_xdisplay(), atom.data(), false);
d->selection = None;
}
bool KSharedPixmap::isAvailable(const TQString & name) const
{
TQString str = TQString("KDESHPIXMAP:%1").arg(name);
Atom sel = XInternAtom(qt_xdisplay(), str.latin1(), true);
if (sel == None)
return false;
return XGetSelectionOwner(qt_xdisplay(), sel) != None;
}
bool KSharedPixmap::loadFromShared(const TQString & name, const TQRect & rect)
{
d->rect = rect;
if (d->selection != None)
// already active
return false;
TQPixmap::resize(0, 0); // invalidate
TQString str = TQString("KDESHPIXMAP:%1").arg(name);
d->selection = XInternAtom(qt_xdisplay(), str.latin1(), true);
if (d->selection == None)
return false;
if (XGetSelectionOwner(qt_xdisplay(), d->selection) == None)
{
d->selection = None;
return false;
}
XConvertSelection(qt_xdisplay(), d->selection, d->pixmap, d->target,
winId(), CurrentTime);
return true;
}
bool KSharedPixmap::x11Event(XEvent *event)
{
if (event->type != SelectionNotify)
return false;
XSelectionEvent *ev = &event->xselection;
if (ev->selection != d->selection)
return false;
if ((ev->target != d->pixmap) || (ev->property == None))
{
kdWarning(270) << k_funcinfo << "illegal selection notify event.\n";
d->selection = None;
emit done(false);
return true;
}
// Read pixmap handle from ev->property
int dummy, format;
unsigned long nitems, ldummy;
unsigned char *pixmap_id = 0;
Atom type;
XGetWindowProperty(qt_xdisplay(), winId(), ev->property, 0, 1, false,
d->pixmap, &type, &format, &nitems, &ldummy,
&pixmap_id);
if (nitems != 1 || !pixmap_id)
{
kdWarning(270) << k_funcinfo << "could not read property, nitems = " << nitems << "\n";
emit done(false);
return true;
}
Window root;
unsigned int width, height, udummy;
void *drawable_id = (void *) pixmap_id;
Drawable pixmap = *(Drawable*) drawable_id;
Status status = XGetGeometry(qt_xdisplay(), pixmap, &root, &dummy, &dummy, &width, &height, &udummy, &udummy);
// HACK
// XGetGeometry can return bogus values on some systems, leading to a SIGFPE
// See http://bugs.trinitydesktop.org/show_bug.cgi?id=1161 for details
// Work around that here...
if ((width < 1) || (height < 1))
return false;
if (status == BadDrawable)
return false;
if (d->rect.isEmpty())
{
TQPixmap::resize(width, height);
XCopyArea(qt_xdisplay(), pixmap, ((KPixmap*)this)->handle(), qt_xget_temp_gc(qt_xscreen(), false),
0, 0, width, height, 0, 0);
XFree(pixmap_id);
XDeleteProperty(qt_xdisplay(), winId(), ev->property);
d->selection = None;
emit done(true);
return true;
}
// Do some more processing here: Generate a tile that can be used as a
// background tile for the rectangle "rect".
//Check for origin off screen
TQPoint origin(0, 0);
if( d->rect.topLeft().x() < 0 || d->rect.topLeft().y() < 0 ) {
//Save the offset and relocate the rect corners
TQPoint tl = d->rect.topLeft();
TQPoint br = d->rect.bottomRight();
if( tl.x() < 0 ) {
origin.setX( abs( tl.x() ) );
tl.setX( 0 );
}
if( tl.y() < 0 ) {
origin.setY( abs( tl.y() ) );
tl.setY( 0 );
}
TQRect adjustedRect( tl, br );
d->rect = adjustedRect;
}
unsigned w = d->rect.width(), h = d->rect.height();
unsigned tw = QMIN(width, w), th = QMIN(height, h);
unsigned xa = d->rect.x() % width, ya = d->rect.y() % height;
unsigned t1w = QMIN(width-xa,tw), t1h = QMIN(height-ya,th);
TQPixmap::resize( tw+origin.x(), th+origin.y() );
XCopyArea(qt_xdisplay(), pixmap, (static_cast<KPixmap*>(this))->handle(), qt_xget_temp_gc(qt_xscreen(), false),
xa, ya, t1w+origin.x(), t1h+origin.y(), origin.x(), origin.y() );
XCopyArea(qt_xdisplay(), pixmap, (static_cast<KPixmap*>(this))->handle(), qt_xget_temp_gc(qt_xscreen(), false),
0, ya, tw-t1w, t1h, t1w, 0);
XCopyArea(qt_xdisplay(), pixmap, (static_cast<KPixmap*>(this))->handle(), qt_xget_temp_gc(qt_xscreen(), false),
xa, 0, t1w, th-t1h, 0, t1h);
XCopyArea(qt_xdisplay(), pixmap, (static_cast<KPixmap*>(this))->handle(), qt_xget_temp_gc(qt_xscreen(), false),
0, 0, tw-t1w, th-t1h, t1w, t1h);
XFree(pixmap_id);
d->selection = None;
XDeleteProperty(qt_xdisplay(), winId(), ev->property);
emit done(true);
return true;
}
#include "ksharedpixmap.moc"
#endif
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