comparison kdiff3/kdiff3plugin-QT4/kdiff3plugin.cpp @ 81:5d7e91c44e6d

New files.

+/* This file is part of the KDiff3 project
+
+   Copyright (C) 2008 Joachim Eibl <joachim dot eibl at gmx dot de>
+
+   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; version 2
+   of the License.
+
+   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; see the file COPYING.  If not, write to
+   the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.
+*/
+
+#include "kdiff3plugin.h"
+
+#include <kapplication.h>
+#include <kstandarddirs.h>
+#include <kaction.h>
+#include <kactionmenu.h>
+#include <klocale.h>
+#include <kgenericfactory.h>
+#include <kurl.h>
+#include <kconfig.h>
+#include <kconfiggroup.h>
+#include <konq_popupmenuinformation.h>
+#include <kmessagebox.h>
+#include <kprocess.h>
+
+//#include <iostream>
+
+static QStringList* s_pHistory=0;
+
+class KDiff3PluginFactory : public KGenericFactory < KDiff3Plugin, KonqPopupMenu >
+{
+   KConfig* m_pConfig;
+   KConfigGroup* m_pConfigGroup;
+public:
+   KDiff3PluginFactory( const char* instanceName  = 0 )
+   : KGenericFactory< KDiff3Plugin, KonqPopupMenu >( instanceName )
+   {
+      m_pConfig = 0;
+      if (s_pHistory==0)
+      {
+         //std::cout << "New History: " << instanceName << std::endl;
+         s_pHistory = new QStringList;
+         m_pConfig = new KConfig( "kdiff3pluginrc", KConfig::SimpleConfig );
+         m_pConfigGroup = new KConfigGroup( m_pConfig, "KDiff3Plugin" );
+         *s_pHistory = m_pConfigGroup->readEntry("HistoryStack", QStringList() );
+      }
+   }
+
+   ~KDiff3PluginFactory()
+   {
+      //std::cout << "Delete History" << std::endl;
+      if ( s_pHistory && m_pConfigGroup )
+         m_pConfigGroup->writeEntry("HistoryStack",*s_pHistory);
+      delete s_pHistory;
+      delete m_pConfigGroup;
+      delete m_pConfig;
+      s_pHistory = 0;
+      m_pConfig = 0;
+   }
+};
+
+K_EXPORT_COMPONENT_FACTORY (libkdiff3plugin, KDiff3PluginFactory ("kdiff3plugin"))
+
+KDiff3Plugin::KDiff3Plugin( KonqPopupMenu* pPopupMenu, const QStringList & /* list */ )
+:KonqPopupMenuPlugin(pPopupMenu)
+{
+   KGlobal::locale()->insertCatalog("kdiff3_plugin");
+   m_pPopupMenu = pPopupMenu;
+   m_pParentWidget = pPopupMenu->parentWidget();
+}
+
+void KDiff3Plugin::setup( KActionCollection* actionCollection, const KonqPopupMenuInformation& popupMenuInfo, QMenu* pMenu )
+{
+   if (KStandardDirs::findExe("kdiff3").isNull ())
+      return;
+
+   // remember currently selected files (copy to a QStringList)
+   KFileItemList itemList = popupMenuInfo.items();
+   foreach ( const KFileItem& item, itemList )
+   {
+      //m_urlList.append( item.url() );
+      m_list.append( item.url().url() );
+   }
+
+
+   /* Menu structure:
+      KDiff3 -> (1 File selected):  Save 'selection' for later comparison (push onto history stack)
+                                    Compare 'selection' with first file on history stack.
+                                    Compare 'selection' with -> choice from history stack
+                                    Merge 'selection' with first file on history stack.
+                                    Merge 'selection' with last two files on history stack.
+                (2 Files selected): Compare 's1' with 's2'
+                                    Merge 's1' with 's2'
+                (3 Files selected): Compare 's1', 's2' and 's3'
+   */
+
+   KActionMenu* pActionMenu = new KActionMenu (i18n ("KDiff3"), actionCollection );
+   KAction* pAction = 0;
+   QString s;
+
+   if(m_list.count() == 1)
+   {
+      int historyCount = s_pHistory ? s_pHistory->count() : 0;
+      s = i18n("Compare with %1", (historyCount>0 ? s_pHistory->front() : QString()) );
+      pAction = new KAction ( s, actionCollection );
+      connect( pAction, SIGNAL(triggered(bool)), this, SLOT(slotCompareWith()));
+      pAction->setEnabled( m_list.count()>0 && historyCount>0 );
+      pActionMenu->addAction(pAction);
+
+      s = i18n("Merge with %1", historyCount>0 ? s_pHistory->front() : QString() );
+      pAction = new KAction( s, actionCollection);
+      connect( pAction, SIGNAL(triggered(bool)), this, SLOT(slotMergeWith()));
+      pAction->setEnabled( m_list.count()>0 && historyCount>0 );
+      pActionMenu->addAction (pAction);
+
+      s = i18n("Save '%1' for later", ( m_list.front() ) );
+      pAction = new KAction ( s, actionCollection);
+      connect( pAction, SIGNAL(triggered(bool)), this, SLOT(slotSaveForLater()));
+      pAction->setEnabled( m_list.count()>0 );
+      pActionMenu->addAction(pAction);
+
+      pAction = new KAction (i18n("3-way merge with base"), actionCollection);
+      connect( pAction, SIGNAL(triggered(bool)), this, SLOT(slotMergeThreeWay()));
+      pAction->setEnabled( m_list.count()>0 && historyCount>=2 );
+      pActionMenu->addAction (pAction);
+
+      if ( s_pHistory && !s_pHistory->empty() )
+      {
+         KActionMenu* pHistoryMenu = new KActionMenu( i18n("Compare with ..."), actionCollection );
+         pHistoryMenu->setEnabled( m_list.count()>0 && historyCount>0 );
+         pActionMenu->addAction(pHistoryMenu);
+         for (QStringList::iterator i = s_pHistory->begin(); i!=s_pHistory->end(); ++i)
+         {
+            pAction = new KAction( *i, actionCollection);
+            connect( pAction, SIGNAL(triggered(bool)), this, SLOT(slotCompareWithHistoryItem()));
+            pHistoryMenu->addAction (pAction);
+         }
+
+         pAction = new KAction (i18n("Clear list"), actionCollection);
+         connect( pAction, SIGNAL(triggered(bool)), this, SLOT(slotClearList()));
+         pActionMenu->addAction (pAction);
+         pAction->setEnabled( historyCount>0 );
+      }
+   }
+   else if(m_list.count() == 2)
+   {
+      pAction = new KAction (i18n("Compare"), actionCollection);
+      connect( pAction, SIGNAL(triggered(bool)), this, SLOT(slotCompareTwoFiles()));
+      pActionMenu->addAction (pAction);
+   }
+   else if ( m_list.count() == 3 )
+   {
+      pAction = new KAction (i18n("3 way comparison"), actionCollection);
+      connect( pAction, SIGNAL(triggered(bool)), this, SLOT(slotCompareThreeFiles()));
+      pActionMenu->addAction (pAction);
+   }
+   pAction = new KAction (i18n("About KDiff3 menu plugin ..."), actionCollection);
+   connect( pAction, SIGNAL(triggered(bool)), this, SLOT(slotAbout()));
+   pActionMenu->addAction (pAction);
+
+   pMenu->addSeparator();
+   pMenu->addAction( pActionMenu );
+   pMenu->addSeparator();
+}
+
+KDiff3Plugin::~KDiff3Plugin ()
+{
+}
+
+void KDiff3Plugin::slotCompareWith()
+{
+   if ( m_list.count() > 0 && s_pHistory && ! s_pHistory->empty() )
+   {
+      QStringList args;
+      args << s_pHistory->front();
+      args << m_list.front();
+      KProcess::execute("kdiff3", args);
+   }
+}
+
+void KDiff3Plugin::slotCompareWithHistoryItem()
+{
+   const KAction* pAction = dynamic_cast<const KAction*>( sender() );
+   if ( m_list.count() > 0 && pAction )
+   {
+      QStringList args;
+      args << pAction->text();
+      args << m_list.front();
+      KProcess::execute ("kdiff3", args);
+   }
+}
+
+void KDiff3Plugin::slotCompareTwoFiles()
+{
+   if ( m_list.count() == 2 )
+   {
+      QStringList args;
+      args << m_list.front();
+      args << m_list.back();
+      KProcess::execute ("kdiff3", args);
+   }
+}
+
+void KDiff3Plugin::slotCompareThreeFiles()
+{
+   if ( m_list.count() == 3 )
+   {
+      QStringList args;
+      args << m_list[0];
+      args << m_list[1];
+      args << m_list[2];
+      KProcess::execute ("kdiff3", args);
+   }
+}
+
+void KDiff3Plugin::slotMergeWith()
+{
+   if ( m_list.count() > 0 && s_pHistory && ! s_pHistory->empty() )
+   {
+      QStringList args;
+      args << s_pHistory->front();
+      args << m_list.front();
+      args << ( "-o" + m_list.front() );
+      KProcess::execute ("kdiff3", args);
+   }
+}
+
+void KDiff3Plugin::slotMergeThreeWay()
+{
+   if ( m_list.count() > 0 && s_pHistory &&  s_pHistory->count()>=2 )
+   {
+      QStringList args;
+      args << (*s_pHistory)[1];
+      args << (*s_pHistory)[0];
+      args << m_list.front();
+      args << ("-o" + m_list.front());
+      KProcess::execute ("kdiff3", args);
+   }
+}
+
+void KDiff3Plugin::slotSaveForLater()
+{
+   if ( !m_list.isEmpty() && s_pHistory )
+   {
+      while ( s_pHistory->count()>=10 )
+         s_pHistory->pop_back();
+      s_pHistory->push_front( m_list.front() );
+   }
+}
+
+void KDiff3Plugin::slotClearList()
+{
+   if ( s_pHistory )
+      s_pHistory->clear();
+}
+
+void KDiff3Plugin::slotAbout()
+{
+   QString s = i18n("KDiff3 Menu Plugin: Copyright (C) 2008 Joachim Eibl\n"
+                    "KDiff3 homepage: http://kdiff3.sourceforge.net\n\n");
+   s += i18n("Using the contextmenu extension:\n"
+             "For simple comparison of two selected files choose \"Compare\".\n"
+             "If the other file is somewhere else \"Save\" the first file for later. "
+             "It will appear in the \"Compare With ...\" submenu. "
+             "Then use \"Compare With\" on second file.\n"
+             "For a 3-way merge first \"Save\" the base file, then the branch to merge and "
+             "choose \"3-way merge with base\" on the other branch which will be used as destination.\n"
+             "Same also applies to directory comparison and merge.");
+   KMessageBox::information(m_pParentWidget, s, tr("About KDiff3 Menu Plugin") );
+}
+