Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdebase@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 151 insertions, 0 deletions

diff --git a/konqueror/preloader/preloader.cc b/konqueror/preloader/preloader.cc
new file mode 100644
index 000000000..a60604e86
--- /dev/null
+++ b/konqueror/preloader/preloader.cc
@@ -0,0 +1,151 @@
+/* This file is part of the KDE project
+   Copyright (C) 2002 Lubos Lunak <l.lunak@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.
+
+   This library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public License
+   along with this library; see the file COPYING.LIB.  If not, write to
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.
+*/
+
+#include "preloader.h"
+#include "konq_settingsxt.h"
+
+#include <kconfig.h>
+#include <dcopref.h>
+#include <kapplication.h>
+#include <dcopclient.h>
+#include <kdebug.h>
+
+KonqyPreloader::KonqyPreloader( const QCString& obj )
+    : KDEDModule( obj )
+    {
+    reconfigure();
+    connect( kapp->dcopClient(), SIGNAL( applicationRemoved( const QCString& )),
+        SLOT( appRemoved( const QCString& )));
+    connect( &check_always_preloaded_timer, SIGNAL( timeout()),
+	SLOT( checkAlwaysPreloaded()));
+    }
+
+KonqyPreloader::~KonqyPreloader()
+    {
+    updateCount();
+    }
+
+bool KonqyPreloader::registerPreloadedKonqy( QCString id, int screen )
+    {
+    if( instances.count() >= (uint)KonqSettings::maxPreloadCount() )
+        return false;
+    instances.append( KonqyData( id, screen ));
+    return true;
+    }
+
+QCString KonqyPreloader::getPreloadedKonqy( int screen )
+    {
+    if( instances.count() == 0 )
+        return "";
+    for( InstancesList::Iterator it = instances.begin();
+         it != instances.end();
+         ++it )
+        {
+        if( (*it).screen == screen )
+            {
+            QCString ret = (*it).id;
+            instances.remove( it );
+            check_always_preloaded_timer.start( 5000, true );
+            return ret;
+            }
+        }
+    return "";
+    }
+
+void KonqyPreloader::unregisterPreloadedKonqy( QCString id_P )
+    {
+    for( InstancesList::Iterator it = instances.begin();
+         it != instances.end();
+         ++it )
+        if( (*it).id == id_P )
+            {
+            instances.remove( it );
+            return;
+            }
+    }
+
+void KonqyPreloader::appRemoved( const QCString& id )
+    {
+    unregisterPreloadedKonqy( id );
+    }
+    
+void KonqyPreloader::reconfigure()
+    {
+    KonqSettings::self()->readConfig();
+    updateCount();
+    // Ignore "PreloadOnStartup" here, it's used by the .desktop file
+    // in the autostart folder, which will do 'konqueror --preload' in autostart
+    // phase 2. This will also cause activation of this kded module.
+    }
+
+void KonqyPreloader::updateCount()
+    {
+    while( instances.count() > (uint)KonqSettings::maxPreloadCount() )
+        {
+        KonqyData konqy = instances.first();
+        instances.pop_front();
+        DCOPRef ref( konqy.id, "KonquerorIface" );
+        ref.send( "terminatePreloaded" );
+        }
+    if( KonqSettings::alwaysHavePreloaded() &&
+        KonqSettings::maxPreloadCount() > 0 &&
+        instances.count() == 0 )
+	{
+	if( !check_always_preloaded_timer.isActive())
+	    {
+	    if( kapp->kdeinitExec( QString::fromLatin1( "konqueror" ),
+		QStringList() << QString::fromLatin1( "--preload" ), NULL, NULL, "0" ) == 0 )
+		{
+		kdDebug( 1202 ) << "Preloading Konqueror instance" << endl;
+	        check_always_preloaded_timer.start( 5000, true );
+		}
+	    // else do nothing, the launching failed
+	    }
+	}
+    }
+
+// have 5s interval between attempts to preload a new konqy
+// in order not to start many of them at the same time
+void KonqyPreloader::checkAlwaysPreloaded()
+    {
+    // TODO here should be detection whether the system is too busy,
+    // and delaying preloading another konqy in such case
+    // but I have no idea how to do it
+    updateCount();
+    }
+    
+void KonqyPreloader::unloadAllPreloaded()
+    {
+    while( instances.count() > 0 )
+        {
+        KonqyData konqy = instances.first();
+        instances.pop_front();
+        DCOPRef ref( konqy.id, "KonquerorIface" );
+        ref.send( "terminatePreloaded" );
+        }
+    // ignore 'always_have_preloaded' here
+    }
+    
+extern "C"
+KDE_EXPORT KDEDModule *create_konqy_preloader( const QCString& obj )
+    {
+    return new KonqyPreloader( obj );
+    }
+
+#include "preloader.moc"