File indexing completed on 2024-04-28 04:20:11

 
 /*
    Copyright (c) 2003-2007 Clarence Dang <dang@kde.org>
    All rights reserved.
 
    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions
    are met:
 
    1. Redistributions of source code must retain the above copyright
       notice, this list of conditions and the following disclaimer.
    2. Redistributions in binary form must reproduce the above copyright
       notice, this list of conditions and the following disclaimer in the
       documentation and/or other materials provided with the distribution.
 
    THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
    IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
    OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
    IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
    NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
    THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
 
 #define DEBUG_KP_COMMAND_HISTORY 0
 
 
 #include "kpCommandHistoryBase.h"
 
 #include <climits>
 
 #include <QMenu>
 
 #include <KSharedConfig>
 #include <KConfigGroup>
 #include <KStandardShortcut>
 #include <KStandardAction>
 #include <KToolBarPopupAction>
 #include <KActionCollection>
 #include <KLocalizedString>
 
 #include "kpCommand.h"
 #include "kpLogCategories.h"
 #include "environments/commands/kpCommandEnvironment.h"
 #include "kpDefs.h"
 #include "document/kpDocument.h"
 #include "mainWindow/kpMainWindow.h"
 #include "tools/kpTool.h"
 
 //---------------------------------------------------------------------
 
 static void ClearPointerList(QList<kpCommand *> &list)
 {
     qDeleteAll(list);
     list.clear();
 }
 
 //--------------------------------------------------------------------------------
 
 kpCommandHistoryBase::kpCommandHistoryBase (bool doReadConfig,
                                             KActionCollection *ac)
 {
     m_actionUndo = new KToolBarPopupAction(QIcon::fromTheme(QStringLiteral("edit-undo")), undoActionText (), this);
 #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
     ac->addAction (QString::fromLatin1(KStandardAction::name (KStandardAction::Undo)), m_actionUndo);
 #else
     ac->addAction (KStandardAction::name (KStandardAction::Undo), m_actionUndo);
 #endif
     ac->setDefaultShortcuts (m_actionUndo, KStandardShortcut::shortcut (KStandardShortcut::Undo));
     connect (m_actionUndo, &KToolBarPopupAction::triggered, this, &kpCommandHistoryBase::undo);
 
     m_actionRedo = new KToolBarPopupAction(QIcon::fromTheme(QStringLiteral("edit-redo")), redoActionText (), this);
 #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
     ac->addAction (QString::fromLatin1(KStandardAction::name (KStandardAction::Redo)), m_actionRedo);
 #else
     ac->addAction (KStandardAction::name (KStandardAction::Redo), m_actionRedo);
 #endif
     ac->setDefaultShortcuts (m_actionRedo, KStandardShortcut::shortcut (KStandardShortcut::Redo));
     connect (m_actionRedo, &KToolBarPopupAction::triggered, this, &kpCommandHistoryBase::redo );
 
 
     m_actionUndo->setEnabled (false);
     m_actionRedo->setEnabled (false);
 
 #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
     connect (m_actionUndo->menu(), &QMenu::triggered,
 #else
     connect (m_actionUndo->popupMenu(), &QMenu::triggered,
 #endif
              this, &kpCommandHistoryBase::undoUpToNumber);
 
 #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
     connect (m_actionRedo->menu(), &QMenu::triggered,
 #else
     connect (m_actionRedo->popupMenu(), &QMenu::triggered,
 #endif
              this, &kpCommandHistoryBase::redoUpToNumber);
 
 
     m_undoMinLimit = 10;
     m_undoMaxLimit = 500;
     m_undoMaxLimitSizeLimit = 16 * 1048576;
 
 
     m_documentRestoredPosition = 0;
 
 
     if (doReadConfig) {
         readConfig ();
     }
 }
 
 //--------------------------------------------------------------------------------
 
 kpCommandHistoryBase::~kpCommandHistoryBase ()
 {
     ::ClearPointerList(m_undoCommandList);
     ::ClearPointerList(m_redoCommandList);
 }
 
 //--------------------------------------------------------------------------------
 
 // public
 int kpCommandHistoryBase::undoLimit () const
 {
     return undoMinLimit ();
 }
 
 // public
 void kpCommandHistoryBase::setUndoLimit (int limit)
 {
     setUndoMinLimit (limit);
 }
 
 
 // public
 int kpCommandHistoryBase::undoMinLimit () const
 {
     return m_undoMinLimit;
 }
 
 // public
 void kpCommandHistoryBase::setUndoMinLimit (int limit)
 {
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "kpCommandHistoryBase::setUndoMinLimit("
                << limit << ")";
 #endif
 
     if (limit < 1 || limit > 5000/*"ought to be enough for anybody"*/)
     {
         qCCritical(kpLogCommands) << "kpCommandHistoryBase::setUndoMinLimit("
                    << limit << ")";
         return;
     }
 
     if (limit == m_undoMinLimit) {
         return;
     }
 
     m_undoMinLimit = limit;
     trimCommandListsUpdateActions ();
 }
 
 
 // public
 int kpCommandHistoryBase::undoMaxLimit () const
 {
     return m_undoMaxLimit;
 }
 
 // public
 void kpCommandHistoryBase::setUndoMaxLimit (int limit)
 {
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "kpCommandHistoryBase::setUndoMaxLimit("
                << limit << ")";
 #endif
 
     if (limit < 1 || limit > 5000/*"ought to be enough for anybody"*/)
     {
         qCCritical(kpLogCommands) << "kpCommandHistoryBase::setUndoMaxLimit("
                    << limit << ")";
         return;
     }
 
     if (limit == m_undoMaxLimit) {
         return;
     }
 
     m_undoMaxLimit = limit;
     trimCommandListsUpdateActions ();
 }
 
 
 // public
 kpCommandSize::SizeType kpCommandHistoryBase::undoMaxLimitSizeLimit () const
 {
     return m_undoMaxLimitSizeLimit;
 }
 
 // public
 void kpCommandHistoryBase::setUndoMaxLimitSizeLimit (kpCommandSize::SizeType sizeLimit)
 {
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "kpCommandHistoryBase::setUndoMaxLimitSizeLimit("
                << sizeLimit << ")";
 #endif
 
     if (sizeLimit < 0 ||
         sizeLimit > (500 * 1048576)/*"ought to be enough for anybody"*/)
     {
         qCCritical(kpLogCommands) << "kpCommandHistoryBase::setUndoMaxLimitSizeLimit("
                    << sizeLimit << ")";
         return;
     }
 
     if (sizeLimit == m_undoMaxLimitSizeLimit) {
         return;
     }
 
     m_undoMaxLimitSizeLimit = sizeLimit;
     trimCommandListsUpdateActions ();
 }
 
 
 // public
 void kpCommandHistoryBase::readConfig ()
 {
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "kpCommandHistoryBase::readConfig()";
 #endif
     KConfigGroup cfg (KSharedConfig::openConfig (), QStringLiteral(kpSettingsGroupUndoRedo));
 
     setUndoMinLimit (cfg.readEntry (kpSettingUndoMinLimit, undoMinLimit ()));
     setUndoMaxLimit (cfg.readEntry (kpSettingUndoMaxLimit, undoMaxLimit ()));
     setUndoMaxLimitSizeLimit (
         cfg.readEntry <kpCommandSize::SizeType> (kpSettingUndoMaxLimitSizeLimit,
                                                  undoMaxLimitSizeLimit ()));
 
     trimCommandListsUpdateActions ();
 }
 
 // public
 void kpCommandHistoryBase::writeConfig ()
 {
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "kpCommandHistoryBase::writeConfig()";
 #endif
     KConfigGroup cfg (KSharedConfig::openConfig (), QStringLiteral(kpSettingsGroupUndoRedo));
 
     cfg.writeEntry (kpSettingUndoMinLimit, undoMinLimit ());
     cfg.writeEntry (kpSettingUndoMaxLimit, undoMaxLimit ());
     cfg.writeEntry <kpCommandSize::SizeType> (
         kpSettingUndoMaxLimitSizeLimit, undoMaxLimitSizeLimit ());
 
     cfg.sync ();
 }
 
 
 // public
 void kpCommandHistoryBase::addCommand (kpCommand *command, bool execute)
 {
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "kpCommandHistoryBase::addCommand("
                << command
                << ",execute=" << execute << ")"
 #endif
 
     if (execute) {
         command->execute ();
     }
 
     m_undoCommandList.push_front (command);
     ::ClearPointerList(m_redoCommandList);
 
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "\tdocumentRestoredPosition=" << m_documentRestoredPosition;
 #endif
     if (m_documentRestoredPosition != INT_MAX)
     {
         if (m_documentRestoredPosition > 0) {
             m_documentRestoredPosition = INT_MAX;
         }
         else {
             m_documentRestoredPosition--;
         }
     #if DEBUG_KP_COMMAND_HISTORY
         qCDebug(kpLogCommands) << "\t\tdocumentRestoredPosition=" << m_documentRestoredPosition;
     #endif
     }
 
     trimCommandListsUpdateActions ();
 }
 
 // public
 void kpCommandHistoryBase::clear ()
 {
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "kpCommandHistoryBase::clear()";
 #endif
 
     ::ClearPointerList(m_undoCommandList);
     ::ClearPointerList(m_redoCommandList);
 
     m_documentRestoredPosition = 0;
 
     updateActions ();
 }
 
 //---------------------------------------------------------------------
 
 // protected slot
 void kpCommandHistoryBase::undoInternal ()
 {
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "kpCommandHistoryBase::undoInternal()";
 #endif
 
     kpCommand *undoCommand = nextUndoCommand ();
     if (!undoCommand) {
         return;
     }
 
     undoCommand->unexecute ();
 
 
     m_undoCommandList.erase (m_undoCommandList.begin ());
     m_redoCommandList.push_front (undoCommand);
 
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "\tdocumentRestoredPosition=" << m_documentRestoredPosition;
 #endif
     if (m_documentRestoredPosition != INT_MAX)
     {
         m_documentRestoredPosition++;
         if (m_documentRestoredPosition == 0)
             Q_EMIT documentRestored ();
     #if DEBUG_KP_COMMAND_HISTORY
         qCDebug(kpLogCommands) << "\t\tdocumentRestoredPosition=" << m_documentRestoredPosition;
     #endif
     }
 }
 
 //---------------------------------------------------------------------
 
 // protected slot
 void kpCommandHistoryBase::redoInternal ()
 {
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "kpCommandHistoryBase::redoInternal()";
 #endif
 
     kpCommand *redoCommand = nextRedoCommand ();
     if (!redoCommand) {
         return;
     }
 
     redoCommand->execute ();
 
 
     m_redoCommandList.erase (m_redoCommandList.begin ());
     m_undoCommandList.push_front (redoCommand);
 
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "\tdocumentRestoredPosition=" << m_documentRestoredPosition;
 #endif
     if (m_documentRestoredPosition != INT_MAX)
     {
         m_documentRestoredPosition--;
         if (m_documentRestoredPosition == 0) {
             Q_EMIT documentRestored ();
         }
     #if DEBUG_KP_COMMAND_HISTORY
         qCDebug(kpLogCommands) << "\t\tdocumentRestoredPosition=" << m_documentRestoredPosition;
     #endif
     }
 }
 
 //---------------------------------------------------------------------
 
 // public slot virtual
 void kpCommandHistoryBase::undo ()
 {
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "kpCommandHistoryBase::undo()";
 #endif
 
     undoInternal ();
     trimCommandListsUpdateActions ();
 }
 
 //---------------------------------------------------------------------
 
 // public slot virtual
 void kpCommandHistoryBase::redo ()
 {
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "kpCommandHistoryBase::redo()";
 #endif
 
     redoInternal ();
     trimCommandListsUpdateActions ();
 }
 
 //---------------------------------------------------------------------
 
 // public slot virtual
 void kpCommandHistoryBase::undoUpToNumber (QAction *which)
 {
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "kpCommandHistoryBase::undoUpToNumber(" << which << ")";
 #endif
 
     for (int i = 0;
          i <= which->data().toInt() && !m_undoCommandList.isEmpty ();
          i++)
     {
         undoInternal ();
     }
 
     trimCommandListsUpdateActions ();
 }
 
 // public slot virtual
 void kpCommandHistoryBase::redoUpToNumber (QAction *which)
 {
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "kpCommandHistoryBase::redoUpToNumber(" << which << ")";
 #endif
 
     for (int i = 0;
          i <= which->data().toInt() && !m_redoCommandList.isEmpty ();
          i++)
     {
         redoInternal ();
     }
 
     trimCommandListsUpdateActions ();
 }
 
 
 // protected
 QString kpCommandHistoryBase::undoActionText () const
 {
     kpCommand *undoCommand = nextUndoCommand ();
 
     return (undoCommand) ? i18n ("&Undo: %1", undoCommand->name ()) : i18n ("&Undo");
 }
 
 // protected
 QString kpCommandHistoryBase::redoActionText () const
 {
     kpCommand *redoCommand = nextRedoCommand ();
 
     return (redoCommand) ? i18n ("&Redo: %1", redoCommand->name ()) : i18n ("&Redo");
 }
 
 
 // protected
 QString kpCommandHistoryBase::undoActionToolTip () const
 {
     kpCommand *undoCommand = nextUndoCommand ();
 
     return (undoCommand) ? i18n ("Undo: %1", undoCommand->name ()) : i18n ("Undo");
 }
 
 // protected
 QString kpCommandHistoryBase::redoActionToolTip () const
 {
     kpCommand *redoCommand = nextRedoCommand ();
 
     return (redoCommand) ? i18n ("Redo: %1", redoCommand->name ()) : i18n ("Redo");
 }
 
 
 // protected
 void kpCommandHistoryBase::trimCommandListsUpdateActions ()
 {
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "kpCommandHistoryBase::trimCommandListsUpdateActions()";
 #endif
 
     trimCommandLists ();
     updateActions ();
 }
 
 //--------------------------------------------------------------------------------
 
 // protected
 void kpCommandHistoryBase::trimCommandList(QList<kpCommand *> &commandList)
 {
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "kpCommandHistoryBase::trimCommandList()";
     QTime timer; timer.start ();
 
     qCDebug(kpLogCommands) << "\tsize=" << commandList.size()
                << "    undoMinLimit=" << m_undoMinLimit
                << " undoMaxLimit=" << m_undoMaxLimit
                << " undoMaxLimitSizeLimit=" << m_undoMaxLimitSizeLimit;
 #endif
     if ( commandList.size() <= m_undoMinLimit )
     {
     #if DEBUG_KP_COMMAND_HISTORY
         qCDebug(kpLogCommands) << "\t\tsize under undoMinLimit - done";
     #endif
         return;
     }
 
 
 #if DEBUG_KP_COMMAND_HISTORY && 0
     qCDebug(kpLogCommands) << "\tsize over undoMinLimit - iterating thru cmds:";
 #endif
 
     QList <kpCommand *>::iterator it = commandList.begin ();
     int upto = 0;
 
     kpCommandSize::SizeType sizeSoFar = 0;
 
     while (it != commandList.end ())
     {
         bool advanceIt = true;
 
         if (sizeSoFar <= m_undoMaxLimitSizeLimit)
         {
             sizeSoFar += (*it)->size ();
         }
 
     #if DEBUG_KP_COMMAND_HISTORY && 0
         qCDebug(kpLogCommands) << "\t\t" << upto << ":"
                    << " name='" << (*it)->name ()
                    << "' size=" << (*it)->size ()
                    << "    sizeSoFar=" << sizeSoFar;
     #endif
 
         if (upto >= m_undoMinLimit)
         {
             if (upto >= m_undoMaxLimit ||
                 sizeSoFar > m_undoMaxLimitSizeLimit)
             {
             #if DEBUG_KP_COMMAND_HISTORY && 0
                 qCDebug(kpLogCommands) << "\t\t\tkill";
             #endif
                 delete (*it);
                 it = commandList.erase (it);
                 advanceIt = false;
             }
         }
 
         if (advanceIt) {
             it++;
         }
         upto++;
     }
 
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "\ttook " << timer.elapsed () << "ms";
 #endif
 }
 
 //--------------------------------------------------------------------------------
 
 // protected
 void kpCommandHistoryBase::trimCommandLists ()
 {
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "kpCommandHistoryBase::trimCommandLists()";
 #endif
 
     trimCommandList(m_undoCommandList);
     trimCommandList(m_redoCommandList);
 
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "\tdocumentRestoredPosition=" << m_documentRestoredPosition
 #endif
     if (m_documentRestoredPosition != INT_MAX)
     {
     #if DEBUG_KP_COMMAND_HISTORY
         qCDebug(kpLogCommands) << "\t\tundoCmdList.size=" << m_undoCommandList.size ()
                    << " redoCmdList.size=" << m_redoCommandList.size ();
     #endif
         if (m_documentRestoredPosition > static_cast<int> (m_redoCommandList.size ()) ||
             -m_documentRestoredPosition > static_cast<int> (m_undoCommandList.size ()))
         {
         #if DEBUG_KP_COMMAND_HISTORY
             qCDebug(kpLogCommands) << "\t\t\tinvalidate documentRestoredPosition";
         #endif
             m_documentRestoredPosition = INT_MAX;
         }
     }
 }
 
 
 static void populatePopupMenu (QMenu *popupMenu,
                                const QString &undoOrRedo,
                                const QList <kpCommand *> &commandList)
 {
     if (!popupMenu) {
         return;
     }
 
     popupMenu->clear ();
 
     QList <kpCommand *>::const_iterator it = commandList.begin ();
     int i = 0;
     while (i < 10 && it != commandList.end ())
     {
         QAction *action = new QAction(i18n ("%1: %2", undoOrRedo, (*it)->name ()), popupMenu);
         action->setData(i);
         popupMenu->addAction (action);
         i++;
         it++;
     }
 
     if (it != commandList.end ())
     {
         // TODO: maybe have a scrollview show all the items instead, like KOffice in KDE 3
         // LOCOMPAT: should be centered text.
         popupMenu->addSection (i18np ("%1 more item", "%1 more items",
                                     commandList.size () - i));
     }
 }
 
 
 // protected
 void kpCommandHistoryBase::updateActions ()
 {
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "kpCommandHistoryBase::updateActions()";
 #endif
 
     m_actionUndo->setEnabled (static_cast<bool> (nextUndoCommand ()));
     // Don't want to keep changing toolbar text.
     // TODO: As a bad side-effect, the menu doesn't have "Undo: <action>"
     //       anymore.  In any case, the KDE4 KToolBarPopupAction
     //       sucks in menus as it forces the clicking of a submenu.  IMO,
     //       there should be no submenu in the menu.
     //m_actionUndo->setText (undoActionText ());
 
     // But in icon mode, a tooltip with context is useful.
     m_actionUndo->setToolTip (undoActionToolTip ());
 #if DEBUG_KP_COMMAND_HISTORY
     QTime timer; timer.start ();
 #endif
 #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
     populatePopupMenu (m_actionUndo->menu (),
 #else
     populatePopupMenu (m_actionUndo->popupMenu (),
 #endif
                        i18n ("Undo"),
                        m_undoCommandList);
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "\tpopuplatePopupMenu undo=" << timer.elapsed ()
                << "ms";
 #endif
 
     m_actionRedo->setEnabled (static_cast<bool> (nextRedoCommand ()));
     // Don't want to keep changing toolbar text.
     // TODO: As a bad side-effect, the menu doesn't have "Undo: <action>"
     //       anymore.  In any case, the KDE4 KToolBarPopupAction
     //       sucks in menus as it forces the clicking of a submenu.  IMO,
     //       there should be no submenu in the menu.
     //m_actionRedo->setText (redoActionText ());
 
     // But in icon mode, a tooltip with context is useful.
     m_actionRedo->setToolTip (redoActionToolTip ());
 #if DEBUG_KP_COMMAND_HISTORY
     timer.restart ();
 #endif
 #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
     populatePopupMenu (m_actionRedo->menu (),
 #else
     populatePopupMenu (m_actionRedo->popupMenu (),
 #endif
                        i18n ("Redo"),
                        m_redoCommandList);
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "\tpopuplatePopupMenu redo=" << timer.elapsed ()
                << "ms";
 #endif
 }
 
 
 // public
 kpCommand *kpCommandHistoryBase::nextUndoCommand () const
 {
     if (m_undoCommandList.isEmpty ()) {
         return nullptr;
     }
 
     return m_undoCommandList.first ();
 }
 
 // public
 kpCommand *kpCommandHistoryBase::nextRedoCommand () const
 {
     if (m_redoCommandList.isEmpty ()) {
         return nullptr;
     }
 
     return m_redoCommandList.first ();
 }
 
 
 // public
 void kpCommandHistoryBase::setNextUndoCommand (kpCommand *command)
 {
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "kpCommandHistoryBase::setNextUndoCommand("<< command << ")";
 #endif
 
     if (m_undoCommandList.isEmpty ()) {
         return;
     }
 
     delete *m_undoCommandList.begin ();
     *m_undoCommandList.begin () = command;
 
     trimCommandListsUpdateActions ();
 }
 
 
 // public slot virtual
 void kpCommandHistoryBase::documentSaved ()
 {
 #if DEBUG_KP_COMMAND_HISTORY
     qCDebug(kpLogCommands) << "kpCommandHistoryBase::documentSaved()";
 #endif
 
     m_documentRestoredPosition = 0;
 }
 
 #include "moc_kpCommandHistoryBase.cpp"