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tdegraphics/kview/kview.cpp

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/* This file is part of the KDE project
Copyright (C) 2001-2003 Matthias Kretz <kretz@kde.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2
as published by the Free Software Foundation.
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "kview.h"
#include "kimageviewer/viewer.h"
#include "kimageviewer/canvas.h"
#include <ksettings/dialog.h>
#include <ksettings/dispatcher.h>
#include <kurl.h>
#include <klibloader.h>
#include <kmessagebox.h>
#include <kparts/componentfactory.h>
#include <kparts/plugin.h>
#include <kparts/part.h>
#include <kapplication.h>
#include <kaction.h>
#include <kstdaction.h>
#include <kimageio.h>
#include <kfiledialog.h>
#include <klocale.h>
#include <kwinmodule.h>
#include <kmenubar.h>
#include <kstatusbar.h>
#include <kdebug.h>
#include <kedittoolbar.h>
#include <kstdaccel.h>
#include <kprogress.h>
#include <tqimage.h>
#include <tqsize.h>
#include <tqscrollbar.h>
#include <tqstyle.h>
#include <tqclipboard.h>
#include <tqdragobject.h>
#include <tqvaluelist.h>
#include <tqtimer.h>
#include <tqdockarea.h>
#include <assert.h>
#include <kplugininfo.h>
KView::KView()
: KParts::MainWindow( 0, "KView" )
, m_pViewer( 0 )
, m_pCanvas( 0 )
, m_pWinModule( new KWinModule( TQT_TQOBJECT(this), KWinModule::INFO_DESKTOP ) )
, m_bImageSizeChangedBlocked( false )
, m_bFullscreen( false )
{
KParts::ReadWritePart * part = KParts::ComponentFactory::createPartInstanceFromLibrary<KParts::ReadWritePart>(
"libkviewviewer", this, "KViewViewer Widget", TQT_TQOBJECT(this), "KImageViewer Part" );
if( part )
{
m_pViewer = static_cast<KImageViewer::Viewer *>( part );
if( m_pViewer )
m_pCanvas = m_pViewer->canvas();
}
kdDebug( 4600 ) << "m_pViewer = " << m_pViewer << endl;
if( m_pCanvas )
{
setupActions( part );
setCentralWidget( part->widget() );
setStandardToolBarMenuEnabled( true );
connect( part->widget(), TQT_SIGNAL( imageSizeChanged( const TQSize & ) ),
TQT_SLOT( imageSizeChanged( const TQSize & ) ) );
connect( part->widget(), TQT_SIGNAL( selectionChanged( const TQRect & ) ),
TQT_SLOT( selectionChanged( const TQRect & ) ) );
connect( part->widget(), TQT_SIGNAL( contextPress( const TQPoint & ) ),
TQT_SLOT( contextPress( const TQPoint & ) ) );
connect( TQApplication::tqclipboard(), TQT_SIGNAL( dataChanged() ),
TQT_SLOT( clipboardDataChanged() ) );
connect( m_pViewer, TQT_SIGNAL( started( KIO::Job * ) ),
this, TQT_SLOT( jobStarted( KIO::Job * ) ) );
connect( m_pViewer, TQT_SIGNAL( completed() ),
this, TQT_SLOT( jobCompleted() ) );
connect( m_pViewer, TQT_SIGNAL( completed( bool ) ),
this, TQT_SLOT( jobCompleted( bool ) ) );
connect( m_pViewer, TQT_SIGNAL( canceled( const TQString & ) ),
this, TQT_SLOT( jobCanceled( const TQString & ) ) );
connect( m_pViewer, TQT_SIGNAL( imageOpened( const KURL & ) ),
m_paRecent, TQT_SLOT( addURL( const KURL & ) ) );
connect( m_pCanvas->widget(), TQT_SIGNAL( cursorPos( const TQPoint & ) ), TQT_SLOT( cursorPos( const TQPoint & ) ) );
m_paRecent->loadEntries( KGlobal::config() );
if (!initialGeometrySet())
resize(500, 350);
readSettings();
m_pViewer->widget()->installEventFilter( this );
// reload configuration when it's changed by the conf dlg
KSettings::Dispatcher::self()->registerInstance( instance(), TQT_TQOBJECT(this), TQT_SLOT( readSettings() ) );
setPluginLoadingMode( LoadPluginsIfEnabled );
createGUI( part );
// create status bar (hidden by default)
statusBar()->insertItem( "", STATUSBAR_SPEED_ID, 0, true );
statusBar()->setItemFixed( STATUSBAR_SPEED_ID,
8 + fontMetrics().width( i18n( "%1/s" ).tqarg( KIO::convertSize( 999000 ) ) ) );
statusBar()->insertItem( "", STATUSBAR_CURSOR_ID, 0, true );
statusBar()->setItemFixed( STATUSBAR_CURSOR_ID, 8 + fontMetrics().width( "8888, 8888" ) );
statusBar()->insertItem( "", STATUSBAR_SIZE_ID, 0, true );
statusBar()->setItemFixed( STATUSBAR_SIZE_ID, 8 + fontMetrics().width( "8888 x 8888" ) );
statusBar()->insertItem( TQString(), STATUSBAR_SELECTION_ID );
m_pProgressBar = new KProgress( statusBar() );
m_pProgressBar->setFixedSize( 140, fontMetrics().height() );
statusBar()->addWidget( m_pProgressBar, 0, true );
m_pProgressBar->hide();
setAutoSaveSettings();
m_paShowMenubar->setChecked( ! menuBar()->isHidden() );
// show progress info dialog if the statusbar is hidden
m_pViewer->setProgressInfoEnabled( statusBar()->isHidden() );
// set small minimum size
setMinimumSize( 0, 0 );
}
else
{
KMessageBox::error( this, i18n( "An error occurred while loading the KViewViewer KPart. Check your installation." ) );
TQTimer::singleShot( 0, kapp, TQT_SLOT( quit() ) );
}
}
KView::~KView()
{
saveSettings( KGlobal::config() );
KGlobal::config()->sync();
}
void KView::load( const KURL & url )
{
if( m_pViewer )
{
m_pViewer->openURL( url );
if( url.isLocalFile() )
{
// XXX: this code is what
//KRecentDirs::add( TQString::tqfromLatin1( ":load_image" ), url.directory() );
// would do:
TQString directory = url.directory();
TQString key = TQString::tqfromLatin1( "load_image" );
KConfig * config = KGlobal::config();
config->setGroup( TQString::tqfromLatin1( "Recent Dirs" ) );
TQStringList result = config->readPathListEntry( key );
// make sure the dir is first in history
result.remove( directory );
result.prepend( directory );
while( result.count() > 3 )
result.remove( result.fromLast() );
config->writePathEntry( key, result );
config->sync();
}
}
}
void KView::loadFromStdin()
{
if( m_pViewer )
{
TQFile file;
file.open( IO_ReadOnly, stdin );
TQImage image( file.readAll() );
file.close();
m_pViewer->newImage( image );
}
}
TQSize KView::sizeForCentralWidgetSize( TQSize size )
{
// add size of the dockareas
kdDebug( 4600 ) << "sizeForCentralWidgetSize " << size << endl;
size.rheight() += topDock()->height() + bottomDock()->height();
size.rwidth() += leftDock()->width() + rightDock()->width() - 2;
kdDebug( 4600 ) << "added Dockareas: " << size << endl;
KStatusBar * sb = statusBar();
size.rheight() += sb->isHidden() ? 0 : sb->height();
kdDebug( 4600 ) << "added Statusbar: " << size << endl;
KMenuBar * mb = menuBar();
if( ! mb->isHidden() )
{
size.rheight() += mb->heightForWidth( width() );
if( tqstyle().tqstyleHint( TQStyle::SH_MainWindow_SpaceBelowMenuBar, this ) )
size.rheight() += dockWindowsMovable() ? 1 : 2;
}
kdDebug( 4600 ) << "added Menubar: " << size << endl;
return size;
}
bool KView::queryClose()
{
return m_pViewer->closeURL();
}
void KView::saveProperties( KConfig * /*config*/ )
{
// save session data:
// What URL is currently open
// somehow the plugins have to get a chance to store their data
}
void KView::readProperties( KConfig * /*config*/ )
{
// read session data
}
void KView::saveSettings( KConfig * config )
{
// write settings to config/kviewrc
kdDebug( 4600 ) << k_funcinfo << endl;
m_paRecent->saveEntries( config );
}
void KView::readSettings() // KConfig * config )
{
// read settings from config/kviewrc
kdDebug( 4600 ) << k_funcinfo << endl;
KConfigGroup cfgGroup( KGlobal::config(), "KView General" );
m_nResizeMode = cfgGroup.readNumEntry( "Resize Mode", 2 );
kdDebug( 4600 ) << "m_nResizeMode = " << m_nResizeMode << endl;
loadPlugins();
}
bool KView::eventFilter( TQObject * obj, TQEvent * ev )
{
if( TQT_BASE_OBJECT(obj) == TQT_BASE_OBJECT(m_pViewer->widget()) && ev->type() == TQEvent::Resize )
{
if( m_nResizeMode == ResizeImage )
handleResize();
}
return KParts::MainWindow::eventFilter( obj, ev );
}
void KView::imageSizeChanged( const TQSize & /*size*/ )
{
TQSize size = m_pCanvas->imageSize();
statusBar()->changeItem( TQString( "%1 x %2" ).tqarg( size.width() ).tqarg( size.height() ), STATUSBAR_SIZE_ID );
handleResize();
}
void KView::selectionChanged( const TQRect & rect )
{
kdDebug( 4600 ) << k_funcinfo << rect << endl;
if( rect.isNull() )
statusBar()->changeItem( TQString(), STATUSBAR_SELECTION_ID );
else
statusBar()->changeItem( TQString( "%1, %2 - %3 x %4" ).tqarg( rect.x() ).tqarg( rect.y() ).tqarg( rect.width() ).tqarg( rect.height() ), STATUSBAR_SELECTION_ID );
action( "crop" )->setEnabled( ! rect.isNull() );
}
void KView::contextPress( const TQPoint & point )
{
TQPopupMenu * pop = ( TQPopupMenu* )factory()->container( "popupmenu", this );
pop->popup( point );
}
void KView::slotOpenFile()
{
KURL url = KFileDialog::getImageOpenURL( ":load_image", this );
load( url );
}
void KView::slotOpenRecent( const KURL & url )
{
load( url );
}
void KView::slotClose()
{
if( m_pViewer->closeURL() )
m_pCanvas->clear();
}
void KView::slotCopy()
{
TQClipboard *cb = TQApplication::tqclipboard();
cb->setSelectionMode( false );
TQRect selectarea = m_pCanvas->selection();
if( selectarea.isEmpty() )
{
kdDebug( 4600 ) << k_funcinfo << " copy whole image" << endl;
cb->setImage( *m_pCanvas->image() );
}
else
{
kdDebug( 4600 ) << k_funcinfo << " copy selected area of image" << endl;
cb->setImage( m_pCanvas->image()->copy( selectarea ) );
}
}
void KView::slotPaste()
{
// Get TQImage from clipboard and create a new image.
TQClipboard *cb = TQApplication::tqclipboard();
TQImage img = cb->image();
if( ! img.isNull() )
m_pViewer->newImage( img );
}
void KView::slotCrop()
{
TQRect selectarea = m_pCanvas->selection();
kdDebug( 4600 ) << "Crop following area: " << selectarea.x() << ", " << selectarea.y() << ", " << selectarea.width() << ", " << selectarea.height() << endl;
if( selectarea.isNull() )
return;
const TQImage * origimg = m_pCanvas->image();
if( origimg == 0 )
return;
m_pCanvas->setImage( origimg->copy( selectarea ) );
m_pViewer->setModified( true );
}
void KView::slotUpdateFullScreen( bool set )
{
m_bFullscreen = set;
if( set )
{ // switch to FullScreen mode
saveMainWindowSettings( KGlobal::config(), "nonFullScreen MainWindow" );
showFullScreen();
applyMainWindowSettings( KGlobal::config(), "FullScreen MainWindow" );
m_paShowMenubar->setChecked( ! menuBar()->isHidden() );
}
else
{ // leave FullScreen mode
saveMainWindowSettings( KGlobal::config(), "FullScreen MainWindow" );
showNormal();
applyMainWindowSettings( KGlobal::config(), "nonFullScreen MainWindow" );
m_paShowMenubar->setChecked( ! menuBar()->isHidden() );
handleResize();
}
}
void KView::slotToggleMenubar()
{
if( menuBar()->isVisible() )
menuBar()->hide();
else
menuBar()->show();
handleResize();
}
void KView::slotPreferences()
{
// construct KCD for KView app
static KSettings::Dialog * dlg = 0;
if( ! dlg )
{
dlg = new KSettings::Dialog( this );
//dlg = new KConfigureDialog( KConfigureDialog::Configurable, this );
//dlg->addPluginInfos( KPluginInfo::fromKPartsInstanceName( instance()->instanceName(), KGlobal::config(), "KParts Plugins" ) );
}
dlg->show();
}
void KView::slotConfigureToolbars()
{
saveMainWindowSettings( KGlobal::config(), "MainWindow" );
KEditToolbar dlg( factory() );
connect( &dlg, TQT_SIGNAL( newToolbarConfig() ), TQT_SLOT( slotNewToolbarConfig() ) );
dlg.exec();
}
void KView::slotNewToolbarConfig()
{
applyMainWindowSettings( KGlobal::config(), "MainWindow" );
}
void KView::reloadConfig()
{
readSettings(); //KGlobal::config() );
}
void KView::enableAction( const char * name, bool b )
{
KAction * a = actionCollection()->action( name );
if( a )
a->setEnabled( b );
else
kdWarning( 4600 ) << k_funcinfo << " unknown action" << endl;
}
void KView::clipboardDataChanged()
{
TQClipboard * cb = TQApplication::tqclipboard();
cb->setSelectionMode( false );
bool hasImage = TQImageDrag::canDecode( cb->data( TQClipboard::Clipboard ) );
m_paPaste->setEnabled( hasImage );
}
void KView::jobStarted( KIO::Job * job )
{
if( job )
{
connect( job, TQT_SIGNAL( percent( KIO::Job *, unsigned long ) ), this, TQT_SLOT( loadingProgress( KIO::Job *, unsigned long ) ) );
connect( job, TQT_SIGNAL( speed( KIO::Job *, unsigned long ) ), this, TQT_SLOT( speedProgress( KIO::Job *, unsigned long ) ) );
//connect( job, TQT_SIGNAL( infoMessage( KIO::Job *, const TQString & ) ), this, TQT_SLOT() );
loadingProgress( job, 0 );
speedProgress( job, 0 );
}
}
void KView::jobCompleted()
{
jobCompleted( false );
}
void KView::jobCompleted( bool /*hasPending*/ )
{
loadingProgress( 0, 101 );
statusBar()->changeItem( "", STATUSBAR_SPEED_ID );
}
void KView::jobCanceled( const TQString & errorMsg )
{
statusBar()->message( errorMsg );
jobCompleted();
}
void KView::loadingProgress( KIO::Job *, unsigned long percent )
{
if( percent > 100 )
{
m_pProgressBar->hide();
return;
}
if( ! m_pProgressBar->isVisible() )
m_pProgressBar->show();
m_pProgressBar->setValue( percent );
}
void KView::speedProgress( KIO::Job *, unsigned long bytesPerSecond )
{
TQString sizeStr;
if( bytesPerSecond > 0 )
sizeStr = i18n( "%1/s" ).tqarg( KIO::convertSize( bytesPerSecond ) );
else
sizeStr = i18n( "Stalled" );
statusBar()->changeItem( sizeStr, STATUSBAR_SPEED_ID );
}
void KView::slotSetStatusBarText( const TQString & msg )
{
kdDebug( 4600 ) << k_funcinfo << endl;
statusBar()->message( msg );
if( statusBar()->isHidden() )
KMessageBox::information( this, msg );
}
void KView::cursorPos( const TQPoint & pos )
{
statusBar()->changeItem( TQString( "%1, %2" ).tqarg( pos.x() ).tqarg( pos.y() ), STATUSBAR_CURSOR_ID );
}
void KView::setupActions( TQObject * partobject )
{
// File
KStdAction::open( TQT_TQOBJECT(this), TQT_SLOT( slotOpenFile() ), actionCollection() );
m_paRecent = KStdAction::openRecent( TQT_TQOBJECT(this), TQT_SLOT( slotOpenRecent( const KURL & ) ), actionCollection() );
KAction * aClose = KStdAction::close( TQT_TQOBJECT(this), TQT_SLOT( slotClose() ), actionCollection() );
aClose->setEnabled( false );
connect( m_pViewer->widget(), TQT_SIGNAL( hasImage( bool ) ), aClose, TQT_SLOT( setEnabled( bool ) ) );
TQObject * extension = partobject->child( 0, "KParts::BrowserExtension", false );
if( extension )
{
TQStrList slotNames = extension->tqmetaObject()->slotNames();
if( slotNames.contains( "print()" ) )
KStdAction::print( extension, TQT_SLOT( print() ), actionCollection(), "print" );
if( slotNames.contains( "del()" ) )
( void )new KAction( i18n( "&Delete" ), "editdelete", SHIFT+Key_Delete,
extension, TQT_SLOT( del() ), actionCollection(), "del" );
connect( extension, TQT_SIGNAL( enableAction( const char *, bool ) ), TQT_SLOT( enableAction( const char *, bool ) ) );
}
KStdAction::quit( TQT_TQOBJECT(this), TQT_SLOT( close() ), actionCollection() );
// Edit
KAction * aCopy = KStdAction::copy( TQT_TQOBJECT(this), TQT_SLOT( slotCopy() ), actionCollection() );
aCopy->setEnabled( false );
connect( m_pViewer->widget(), TQT_SIGNAL( hasImage( bool ) ), aCopy, TQT_SLOT( setEnabled( bool ) ) );
m_paPaste = KStdAction::paste( TQT_TQOBJECT(this), TQT_SLOT( slotPaste() ), actionCollection() );
clipboardDataChanged(); //enable or disable paste
KAction * aCrop = new KAction( i18n( "Cr&op" ), Key_C, TQT_TQOBJECT(this), TQT_SLOT( slotCrop() ), actionCollection(), "crop" );
aCrop->setEnabled( false );
KAction * aReload = new KAction( i18n( "&Reload" ), "reload", KStdAccel::shortcut( KStdAccel::Reload ), partobject,
TQT_SLOT( reload() ), actionCollection(), "reload" );
aReload->setEnabled( false );
connect( m_pViewer->widget(), TQT_SIGNAL( hasImage( bool ) ), aReload, TQT_SLOT( setEnabled( bool ) ) );
// Settings
m_paShowMenubar = KStdAction::showMenubar( TQT_TQOBJECT(this), TQT_SLOT( slotToggleMenubar() ), actionCollection() );
createStandardStatusBarAction();
m_paShowStatusBar = ::tqqt_cast<KToggleAction*>( action( "options_show_statusbar" ) );
if( m_paShowStatusBar )
connect( m_paShowStatusBar, TQT_SIGNAL( toggled( bool ) ), TQT_SLOT( statusbarToggled( bool ) ) );
m_paShowFullScreen = KStdAction::fullScreen( 0, 0, actionCollection(), this );
connect( m_paShowFullScreen, TQT_SIGNAL( toggled( bool )), this, TQT_SLOT( slotUpdateFullScreen( bool )));
KStdAction::preferences( TQT_TQOBJECT(this), TQT_SLOT( slotPreferences() ), actionCollection() );
KStdAction::keyBindings(guiFactory(), TQT_SLOT(configureShortcuts()),
actionCollection());
KStdAction::configureToolbars( TQT_TQOBJECT(this), TQT_SLOT( slotConfigureToolbars() ), actionCollection() );
}
void KView::handleResize()
{
if( m_bImageSizeChangedBlocked )
return;
m_bImageSizeChangedBlocked = true;
setUpdatesEnabled( false );
switch( m_nResizeMode )
{
case ResizeWindow:
fitWindowToImage();
fitWindowToImage();
break;
case ResizeImage:
m_pCanvas->boundImageTo( m_pViewer->widget()->size() );
break;
case BestFit:
TQSize imageSize = m_pCanvas->imageSize();
if( imageSize.isEmpty() )
return;
// Compare the image size and the maximum available space in the
// display canvas i.e. will the image fit without resizing ?
TQSize maxCanvas = maxCanvasSize();
if( ( maxCanvas.height() >= imageSize.height() )
&& ( maxCanvas.width() >= imageSize.width() ) )
{
//Image can be displayed at full size
m_pCanvas->setZoom( 1.0 );
}
else
{
// Image is too big for the available canvas.
m_pCanvas->boundImageTo( maxCanvas );
}
// We assume the displayed image size has changed and we must resize
// the window around it (using the code for ResizeWindow).
fitWindowToImage();
fitWindowToImage();
break;
}
setUpdatesEnabled( true );
m_bImageSizeChangedBlocked = false;
}
void KView::fitWindowToImage()
{
if( m_bFullscreen ) // don't do anything in fullscreen mode
return;
bool centeredOrig = m_pCanvas->centered();
m_pCanvas->setCentered( false );
TQSize imagesize = m_pCanvas->currentSize();
if( imagesize.isEmpty() )
return;
TQSize winsize = sizeForCentralWidgetSize( imagesize );
TQRect workarea = m_pWinModule->workArea();
TQScrollBar * sb = new TQScrollBar( Qt::Horizontal, this );
int scrollbarwidth = sb->height();
delete sb;
if( winsize.width() > workarea.width() )
{
winsize.setWidth( workarea.width() );
winsize.rheight() += scrollbarwidth;
if( winsize.height() > workarea.height() )
winsize.setHeight( workarea.height() );
}
else if( winsize.height() > workarea.height() )
{
winsize.setHeight( workarea.height() );
winsize.rwidth() += scrollbarwidth;
if( winsize.width() > workarea.width() )
winsize.setWidth( workarea.width() );
}
TQRect winrect( tqgeometry() );
winrect.setSize( winsize );
int xdiff = winrect.x() + winrect.width() - workarea.x() - workarea.width();
int ydiff = winrect.y() + winrect.height() - workarea.y() - workarea.height();
if( xdiff > 0 )
{
winrect.rLeft() -= xdiff;
winrect.rRight() -= xdiff;
}
if( ydiff > 0 )
{
winrect.rTop() -= ydiff;
winrect.rBottom() -= ydiff;
}
setGeometry( winrect );
m_pCanvas->setCentered( centeredOrig );
}
TQSize KView::barSize( int mainwinwidth, BarSizeFrom from )
{
int height = 0;
int width = 0;
if( toolBar()->isVisibleTo( this ) )
{
switch( toolBar()->barPos() )
{
case KToolBar::Top:
case KToolBar::Bottom:
height += toolBar()->height();
break;
case KToolBar::Left:
case KToolBar::Right:
width += toolBar()->width();
break;
case KToolBar::Flat:
height += kapp->tqstyle().tqpixelMetric( TQStyle::PM_DockWindowHandleExtent );
break;
case KToolBar::Floating:
break;
case KToolBar::Unmanaged:
break;
}
}
if( menuBar()->isVisibleTo( this ) && ( ! menuBar()->isTopLevelMenu() ) )
height += menuBar()->heightForWidth( mainwinwidth + ( ( from == FromImageSize ) ? width : 0 ) );
if( statusBar()->isVisibleTo( this ) )
height += statusBar()->height();
return TQSize( width, height );
}
TQSize KView::maxCanvasSize()
{
TQSize workarea = m_pWinModule->workArea().size();
TQSize framesize = frameSize() - size();
TQSize maxcanvassize = workarea - framesize - barSize( workarea.width() - framesize.width(), FromWidgetSize );
kdDebug( 4600 ) << "maxcanvassize = " << maxcanvassize.width() << "x" << maxcanvassize.height() << endl;
return maxcanvassize;
}
void KView::loadPlugins()
{
createGUI( 0 );
createShellGUI( false );
createGUI( m_pViewer );
}
void KView::statusbarToggled( bool sbvisible )
{
kdDebug( 4600 ) << k_funcinfo << sbvisible << endl;
m_pViewer->setProgressInfoEnabled( !sbvisible );
}
// vim:sw=4:ts=4
#include "kview.moc"
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