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/kdegraphics@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 154 insertions, 0 deletions

diff --git a/kghostview/kgvconfigdialog.cpp b/kghostview/kgvconfigdialog.cpp
new file mode 100644
index 00000000..a9952008
--- /dev/null
+++ b/kghostview/kgvconfigdialog.cpp
@@ -0,0 +1,154 @@
+/**
+ * Copyright (C) 2000-2002 the KGhostView authors. See file AUTHORS.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ */
+
+
+// Add header files alphabetically
+
+#include <qlayout.h>
+
+#include <kconfig.h>
+#include <kdebug.h>
+#include <kglobal.h>
+#include <kiconloader.h>
+#include <kinstance.h>
+#include <klocale.h>
+#include <kmessagebox.h>
+#include <kprocess.h>
+#include <kstandarddirs.h>
+#include <kconfigdialog.h>
+
+#include "configuration.h"
+#include "kgv_view.h"
+#include "kgvfactory.h"
+
+#include "generalsettingswidget.h"
+#include "gssettingswidget.h"
+
+#include "kgvconfigdialog.h"
+
+
+namespace {
+    QString getGSVersion( QString fullPathToExec )
+    {
+	QString res;
+	QString chkVersion = KProcess::quote(fullPathToExec) + " --version";
+	FILE* p = popen( QFile::encodeName(chkVersion), "r" );
+	if( p ) {
+	    // FIXME: a badly configured interpreter can hang us
+	    QFile qp;
+	    qp.open( IO_ReadOnly, p );
+	    qp.readLine( res, 80 );
+	    qp.close();
+	    pclose( p );
+	    res = res.stripWhiteSpace();
+	}
+	kdDebug(4500) << "kgvconfigdialog.cpp::{unamed}::getGSVersion() returning " << res <<  endl;
+	return res;
+    }
+
+
+    /* A mechanism for triggering redetection of gs versions:
+     *
+     * The idea is that whenever we find we need to workaround a certain version of gs,
+     * we cannot rely that there will solelly be a new kghostviewrc, but that users will
+     * upgrade kghostview. Therefore, whenever we want to trigger redection on a new version,
+     * we increment the counter below. It should have the old value from the previous version
+     * of kghostview and this function will get called.
+     * 
+     */
+
+    /* On a related note:
+     * We don't detect upgrades (or downgrades, for that matter) of gs.
+     * I am seeing if I can get the version out of gs as a side effect to displaying a file.
+     * This way, using kconfig:/Ghostscript/GS Version we will see whether the version has changed
+     * and trigger a redetection without the trouble of running "gs --version" on each launch.
+     *
+     * LPC (9 April 2003)
+     */
+    /* currentRedetection value log:
+     * 
+     * 1- remove -dMaxBitmap for gs 6.5x
+     * 2- see if it supports .setsafe ( see bug:57291 ).
+     */
+    const int currentRedetection = 2;
+
+
+    /* Here are the issues we found so far in version of gs:
+     *
+     * - gs before 6.50 uses device x11alpha instead of x11
+     * - gs 6.5x does not work well with -dMaxBitmap=...
+     * - gs 6.52 and earlier as well as 7.0x for x < 4 don't support the .setsafe operator
+     *
+     */
+
+    QString recommendSetSafe( QString version )
+    {
+	if ( version < QString::number( 6.53 ) ) return QString::number( 6.53 );
+	if ( version[ 0 ] == '7' && version < QString::number( 7.04 ) ) return QString::number( 7.05 );
+	return QString::null;
+    }
+    // This function should contain all the gs version specific workarounds.
+    void redoGSDetection() 
+    {
+	kdDebug(4500) << "kgvconfigdialog.cpp::{unnamed}::redoGSDetection()" << endl;
+	QString version = getGSVersion( Configuration::interpreter() );
+	QString recommended = recommendSetSafe( version );
+	if ( !recommended.isNull() ) {
+	    KMessageBox::sorry( 0,
+		    i18n( "Your version of gs (version %1) is too old, since it has security issues "
+			"which are impossible to resolve. Please upgrade to a newer version.\n"
+			"KGhostView will try to work with it, but it may not display any files at all.\n"
+			"Version %2 seems to be appropriate on your system, although newer versions will work as well." )
+		    .arg( version )
+		    .arg( recommended ) );
+	}
+	if ( version < QString::number( 7.00 ) ) 
+	{
+	    QStringList arguments = QStringList::split( ' ', Configuration::antialiasingArguments() );
+	    arguments.remove( QString::fromLatin1( "-dMaxBitmap=10000000" ) );
+	    QString antiAliasArgs = arguments.join( " " );
+
+	    Configuration::setAntialiasingArguments( antiAliasArgs );
+	}
+
+	Configuration::setRedetectionCounter( currentRedetection );
+	Configuration::setVersion( version );
+    }
+} // namespace
+
+void  ConfigDialog::showSettings( KGVPart* main ) {
+    const char* name = "kghostview-settings";
+    if ( KConfigDialog::showDialog( name ) ) return;
+
+    if ( Configuration::redetectionCounter() < currentRedetection ) redoGSDetection();
+
+    KConfigDialog* dialog = new KConfigDialog( 0, name,
+	    Configuration::self(), KDialogBase::IconList );
+    dialog->addPage( new GeneralSettingsWidget( 0, "general-settings" ),
+	    i18n( "General" ), QString::fromLatin1( "kghostview" ) );
+    GSSettingsWidget *gssw = new GSSettingsWidget( 0, "gs-settings" );
+    dialog->addPage( gssw, i18n( "Ghostscript\nConfiguration" ), QString::fromLatin1( "pdf" ) );
+
+    gssw->setDetectedVersion(Configuration::version());
+
+    QObject::connect( dialog, SIGNAL( settingsChanged() ), main, SLOT( slotConfigurationChanged() ) );
+    dialog->show();
+}
+
+
+// vim:sw=4:sts=4:ts=8:noet