ViewManager.cpp 22.7 KB
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/*
    Copyright (C) 2006-2007 by Robert Knight <robertknight@gmail.com>

    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.
*/

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// Own
#include "ViewManager.h"

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// System
#include <assert.h>

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// Qt
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#include <QtCore/QSignalMapper>
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// KDE
#include <kdebug.h>
#include <KLocale>
#include <KToggleAction>
#include <KXMLGUIFactory>

// Konsole
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#include "BookmarkHandler.h"
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#include "ColorScheme.h"
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#include "Session.h"
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#include "TerminalDisplay.h"
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#include "SessionController.h"
#include "SessionManager.h"
#include "ViewContainer.h"
#include "ViewSplitter.h"

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using namespace Konsole;

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ViewManager::ViewManager(QObject* parent , KActionCollection* collection)
    : QObject(parent)
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    , _viewSplitter(0)
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    , _actionCollection(collection)
    , _containerSignalMapper(new QSignalMapper(this))
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{
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    // create main view area
    _viewSplitter = new ViewSplitter(0);   
    // the ViewSplitter class supports both recursive and non-recursive splitting,
    // in non-recursive mode, all containers are inserted into the same top-level splitter
    // widget, and all the divider lines between the containers have the same orientation
    //
    // the ViewManager class is not currently able to handle a ViewSplitter in recursive-splitting
    // mode 
    _viewSplitter->setRecursiveSplitting(false);

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    // setup actions which relating to the view
    setupActions();

    // emit a signal when all of the views held by this view manager are destroyed
    connect( _viewSplitter , SIGNAL(allContainersEmpty()) , this , SIGNAL(empty()) );
    connect( _viewSplitter , SIGNAL(empty(ViewSplitter*)) , this , SIGNAL(empty()) );
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    // listen for addition or removal of views from associated containers
    connect( _containerSignalMapper , SIGNAL(mapped(QObject*)) , this , 
            SLOT(containerViewsChanged(QObject*)) ); 
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    // listen for profile changes
    connect( SessionManager::instance() , SIGNAL(profileChanged(const QString&)) , this,
            SLOT(profileChanged(const QString&)) );
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    connect( SessionManager::instance() , SIGNAL(sessionUpdated(Session*)) , this,
            SLOT(updateViewsForSession(Session*)) );
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}

ViewManager::~ViewManager()
{
}
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QWidget* ViewManager::activeView() const
{
    ViewContainer* container = _viewSplitter->activeContainer();
    if ( container )
    {
        return container->activeView();
    }
    else
    {
        return 0;
    }
}
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QWidget* ViewManager::widget() const
{
    return _viewSplitter;
}

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void ViewManager::setupActions()
{
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    KActionCollection* collection = _actionCollection;
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    KAction* nextViewAction = new KAction( i18n("Next View") , this );
    KAction* previousViewAction = new KAction( i18n("Previous View") , this );
    QAction* nextContainerAction = new QAction( i18n("Next View Container") , this);
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    // list of actions that should only be enabled when there are multiple view
    // containers open
    QList<QAction*> multiViewOnlyActions;
    multiViewOnlyActions << nextContainerAction;

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    if ( collection )
    {
        KAction* splitLeftRightAction = new KAction( KIcon("view-left-right"),
                                                      i18n("Split View Left/Right"),
                                                      this );
        splitLeftRightAction->setShortcut( QKeySequence(Qt::CTRL+Qt::SHIFT+Qt::Key_L) );
        collection->addAction("split-view-left-right",splitLeftRightAction);
        connect( splitLeftRightAction , SIGNAL(triggered()) , this , SLOT(splitLeftRight()) );

        KAction* splitTopBottomAction = new KAction( KIcon("view-top-bottom") , 
                                             i18n("Split View Top/Bottom"),this);
        splitTopBottomAction->setShortcut( QKeySequence(Qt::CTRL+Qt::SHIFT+Qt::Key_T) );
        collection->addAction("split-view-top-bottom",splitTopBottomAction);
        connect( splitTopBottomAction , SIGNAL(triggered()) , this , SLOT(splitTopBottom()));

        KAction* closeActiveAction = new KAction( i18n("Close Active") , this );
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        closeActiveAction->setIcon(KIcon("view-remove"));
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        closeActiveAction->setShortcut( QKeySequence(Qt::CTRL+Qt::SHIFT+Qt::Key_S) );
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        closeActiveAction->setEnabled(false);
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        collection->addAction("close-active-view",closeActiveAction);
        connect( closeActiveAction , SIGNAL(triggered()) , this , SLOT(closeActiveView()) );
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        multiViewOnlyActions << closeActiveAction; 

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        KAction* closeOtherAction = new KAction( i18n("Close Others") , this );
        closeOtherAction->setShortcut( QKeySequence(Qt::CTRL+Qt::SHIFT+Qt::Key_O) );
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        closeOtherAction->setEnabled(false);
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        collection->addAction("close-other-views",closeOtherAction);
        connect( closeOtherAction , SIGNAL(triggered()) , this , SLOT(closeOtherViews()) );
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        multiViewOnlyActions << closeOtherAction;
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        QAction* detachViewAction = collection->addAction("detach-view");
        detachViewAction->setIcon( KIcon("tab-breakoff") );
        detachViewAction->setText( i18n("&Detach View") );
        // Ctrl+Shift+D is not used as a shortcut by default because it is too close
        // to Ctrl+D - which will terminate the session in many cases
        detachViewAction->setShortcut( QKeySequence(Qt::CTRL+Qt::SHIFT+Qt::Key_H) );
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        multiViewOnlyActions << detachViewAction;
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        connect( detachViewAction , SIGNAL(triggered()) , this , SLOT(detachActiveView()) );
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        // Expand & Shrink Active View
        KAction* expandActiveAction = new KAction( i18n("Expand View") , this );
        expandActiveAction->setShortcut( QKeySequence(Qt::CTRL+Qt::SHIFT+Qt::Key_BracketRight) );
        collection->addAction("expand-active-view",expandActiveAction);
        connect( expandActiveAction , SIGNAL(triggered()) , this , SLOT(expandActiveView()) );

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        multiViewOnlyActions << expandActiveAction;

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        KAction* shrinkActiveAction = new KAction( i18n("Shrink View") , this );
        shrinkActiveAction->setShortcut( QKeySequence(Qt::CTRL+Qt::SHIFT+Qt::Key_BracketLeft) );
        collection->addAction("shrink-active-view",shrinkActiveAction);
        connect( shrinkActiveAction , SIGNAL(triggered()) , this , SLOT(shrinkActiveView()) );

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        multiViewOnlyActions << shrinkActiveAction;

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        // Next / Previous View , Next Container
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        collection->addAction("next-view",nextViewAction);
        collection->addAction("previous-view",previousViewAction);
        collection->addAction("next-container",nextContainerAction);
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    }
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    QListIterator<QAction*> iter(multiViewOnlyActions);
    while ( iter.hasNext() )
    {
        connect( this , SIGNAL(splitViewToggle(bool)) , iter.next() , SLOT(setEnabled(bool)) );
    }

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    KShortcut nextViewShortcut = nextViewAction->shortcut();
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    nextViewShortcut.setPrimary( QKeySequence(Qt::SHIFT+Qt::Key_Right) );
    nextViewShortcut.setAlternate( QKeySequence(Qt::CTRL+Qt::Key_PageUp) );
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    nextViewAction->setShortcut(nextViewShortcut); 
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    connect( nextViewAction, SIGNAL(triggered()) , this , SLOT(nextView()) );
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    _viewSplitter->addAction(nextViewAction);
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    KShortcut previousViewShortcut = previousViewAction->shortcut();
    previousViewShortcut.setPrimary( QKeySequence(Qt::SHIFT+Qt::Key_Left) );
    previousViewShortcut.setAlternate( QKeySequence(Qt::CTRL+Qt::Key_PageDown) );
    previousViewAction->setShortcut(previousViewShortcut);
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    connect( previousViewAction, SIGNAL(triggered()) , this , SLOT(previousView()) );
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    _viewSplitter->addAction(previousViewAction);
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    nextContainerAction->setShortcut( QKeySequence(Qt::SHIFT+Qt::Key_Tab) );
    connect( nextContainerAction , SIGNAL(triggered()) , this , SLOT(nextContainer()) );
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    _viewSplitter->addAction(nextContainerAction);
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}

void ViewManager::nextContainer()
{
    _viewSplitter->activateNextContainer();
}

void ViewManager::nextView()
{
    ViewContainer* container = _viewSplitter->activeContainer();

    Q_ASSERT( container );

    container->activateNextView();
}

void ViewManager::previousView()
{
    ViewContainer* container = _viewSplitter->activeContainer();

    Q_ASSERT( container );

    container->activatePreviousView();
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}
void ViewManager::detachActiveView()
{
    // find the currently active view and remove it from its container 
    ViewContainer* container = _viewSplitter->activeContainer();
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    TerminalDisplay* activeView = dynamic_cast<TerminalDisplay*>(container->activeView());
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    if (!activeView)
        return;

    emit viewDetached(_sessionMap[activeView]);
    
    _sessionMap.remove(activeView);

    // remove the view from this window
    container->removeView(activeView);
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    activeView->deleteLater();
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    // if the container from which the view was removed is now empty then it can be deleted,
    // unless it is the only container in the window, in which case it is left empty
    // so that there is always an active container
    if ( _viewSplitter->containers().count() > 1 && 
         container->views().count() == 0 )
    {
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        removeContainer(container);
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    }

}

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void ViewManager::sessionFinished()
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{
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    // switch to the previous view before deleting the session views to prevent flicker 
    // occurring as a result of an interval between removing the active view and switching
    // to the previous view
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    previousView();

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    Session* session = qobject_cast<Session*>(sender());

    Q_ASSERT(session);

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    QList<TerminalDisplay*> children = _viewSplitter->findChildren<TerminalDisplay*>();
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    foreach ( TerminalDisplay* view , children )
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    {
        if ( _sessionMap[view] == session )
        {
            _sessionMap.remove(view);
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            view->deleteLater();
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        }
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    }
}

void ViewManager::focusActiveView()
{
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    // give the active view in a container the focus.  this ensures 
    // that controller associated with that view is activated and the session-specific
    // menu items are replaced with the ones for the newly focused view

    // see the viewFocused() method

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    ViewContainer* container = _viewSplitter->activeContainer(); 
    if ( container )
    {
        QWidget* activeView = container->activeView();
        if ( activeView )
        {
            activeView->setFocus(Qt::MouseFocusReason);
        }
    }
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}

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void ViewManager::viewActivated( QWidget* view )
{
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    Q_ASSERT( view != 0 );

    // focus the activated view, this will cause the SessionController
    // to notify the world that the view has been focused and the appropriate UI
    // actions will be plugged in.
    view->setFocus(Qt::OtherFocusReason);
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}

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void ViewManager::splitLeftRight()
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{
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    splitView(Qt::Horizontal);
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}
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void ViewManager::splitTopBottom()
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{
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    splitView(Qt::Vertical);
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}

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void ViewManager::splitView(Qt::Orientation orientation)
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{
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    // iterate over each session which has a view in the current active
    // container and create a new view for that session in a new container 
    QListIterator<QWidget*> existingViewIter(_viewSplitter->activeContainer()->views());
    
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    ViewContainer* container = 0; 
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    while (existingViewIter.hasNext())
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    {
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        Session* session = _sessionMap[(TerminalDisplay*)existingViewIter.next()];
        TerminalDisplay* display = createTerminalDisplay();
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        applyProfile(display,session->profileKey()); 
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        ViewProperties* properties = createController(session,display);
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        _sessionMap[display] = session;
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        // create a container using settings from the first 
        // session in the previous container
        if ( !container )
            container = createContainer(session->profileKey());

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        container->addView(display,properties);
        session->addView( display );
    }
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    _viewSplitter->addContainer(container,orientation);
    emit splitViewToggle(_viewSplitter->containers().count() > 0);
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    // focus the new container
    container->containerWidget()->setFocus();
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    // ensure that the active view is focused after the split / unsplit
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    ViewContainer* activeContainer = _viewSplitter->activeContainer();
    QWidget* activeView = activeContainer ? activeContainer->activeView() : 0;

    if ( activeView )
        activeView->setFocus(Qt::OtherFocusReason);
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}
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void ViewManager::removeContainer(ViewContainer* container)
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{
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    // note that the _viewSplitter->containers().count() will not be updated
    // until the container is deleted when Qt returns to the main event loop,
    // so we take the previous container count and work out what the new count
    // would be.
    int previousCount = _viewSplitter->containers().count();
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    container->deleteLater();
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    emit splitViewToggle( (previousCount-1) > 1);
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}
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void ViewManager::expandActiveView()
{
    _viewSplitter->adjustContainerSize(_viewSplitter->activeContainer(),10);
}
void ViewManager::shrinkActiveView()
{
    _viewSplitter->adjustContainerSize(_viewSplitter->activeContainer(),-10);
}
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void ViewManager::closeActiveView()
{
    // only do something if there is more than one container active
    if ( _viewSplitter->containers().count() > 1 )
    {
        ViewContainer* container = _viewSplitter->activeContainer();

        removeContainer(container);
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        // focus next container so that user can continue typing 
        // without having to manually focus it themselves
        nextContainer();
    }
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}
void ViewManager::closeOtherViews()
{
    ViewContainer* active = _viewSplitter->activeContainer();

    QListIterator<ViewContainer*> iter(_viewSplitter->containers());
    while ( iter.hasNext() )
    {
        ViewContainer* next = iter.next();
        if ( next != active )
            delete next;
    }
}

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SessionController* ViewManager::createController(Session* session , TerminalDisplay* view)
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{
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    // create a new controller for the session, and ensure that this view manager
    // is notified when the view gains the focus
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    SessionController* controller = new SessionController(session,view,this);
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    connect( controller , SIGNAL(focused(SessionController*)) , this , SIGNAL(activeViewChanged(SessionController*)) );
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    connect( session , SIGNAL(destroyed()) , controller , SLOT(deleteLater()) );
    connect( view , SIGNAL(destroyed()) , controller , SLOT(deleteLater()) );
    
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    return controller;
}

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void ViewManager::createView(Session* session)
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{
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    // create the default container
    if (_viewSplitter->containers().count() == 0)
    {
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        _viewSplitter->addContainer( createContainer(session->profileKey()) , 
                                     Qt::Vertical );
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        emit splitViewToggle(false);
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    }

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    // notify this view manager when the session finishes so that its view
    // can be deleted
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    connect( session , SIGNAL(finished()) , this , SLOT(sessionFinished()) );
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    // iterate over the view containers owned by this view manager
    // and create a new terminal display for the session in each of them, along with
    // a controller for the session/display pair 
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    ViewContainer* const activeContainer = _viewSplitter->activeContainer();
    QListIterator<ViewContainer*> containerIter(_viewSplitter->containers());

    while ( containerIter.hasNext() )
    {
        ViewContainer* container = containerIter.next();
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        TerminalDisplay* display = createTerminalDisplay();
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        applyProfile(display,session->profileKey());
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        // set initial size
        // temporary default used for now
        display->setSize(80,40);
        
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        ViewProperties* properties = createController(session,display);
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        _sessionMap[display] = session; 
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        container->addView(display,properties);
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        session->addView(display);

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        if ( container == activeContainer ) 
        {
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            container->setActiveView(display);
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            display->setFocus( Qt::OtherFocusReason );
        }
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    }
}

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ViewContainer* ViewManager::createContainer(const QString& profileKey)
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{
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    const Profile* info = SessionManager::instance()->profile(profileKey);

    Q_ASSERT( info );

    const int tabPosition = info->property(Profile::TabBarPosition).value<int>();

    ViewContainer::NavigationPosition position = ( tabPosition == Profile::TabBarTop ) ?
                                                   ViewContainer::NavigationPositionTop :
                                                   ViewContainer::NavigationPositionBottom;

    ViewContainer* container = new TabbedViewContainerV2(position,_viewSplitter);
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    // connect signals and slots
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    connect( container , SIGNAL(viewAdded(QWidget*,ViewProperties*)) , _containerSignalMapper ,
           SLOT(map()) );
    connect( container , SIGNAL(viewRemoved(QWidget*)) , _containerSignalMapper ,
           SLOT(map()) ); 
    _containerSignalMapper->setMapping(container,container);

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    connect( container , SIGNAL(viewRemoved(QWidget*)) , this , SLOT(viewCloseRequest(QWidget*)) );
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    connect( container , SIGNAL(closeRequest(QWidget*)) , this , SLOT(viewCloseRequest(QWidget*)) );
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    connect( container , SIGNAL(activeViewChanged(QWidget*)) , this , SLOT(viewActivated(QWidget*)));
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    return container;
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}

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void ViewManager::containerViewsChanged(QObject* container)
{
    qDebug() << "Container views changed";

    if ( container == _viewSplitter->activeContainer() )
    {
        emit viewPropertiesChanged( viewProperties() );
    } 
}

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void ViewManager::viewCloseRequest(QWidget* view)
{
    // 1. detach view from session
    // 2. if the session has no views left, close it
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    qDebug() << "Removing view.";

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    TerminalDisplay* display = (TerminalDisplay*)view;
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    Session* session = _sessionMap[ display ];
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    if ( session )
    {
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        display->deleteLater();
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        _sessionMap.remove(display);

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        if ( session->views().count() == 0 )
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            session->close();
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    }
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    focusActiveView();
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}

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TerminalDisplay* ViewManager::createTerminalDisplay()
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{
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   TerminalDisplay* display = new TerminalDisplay(0);
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   //TODO Temporary settings used here
   display->setBellMode(0);
   display->setTerminalSizeHint(false);
   display->setCutToBeginningOfLine(true);
   display->setTerminalSizeStartup(false);
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   display->setScrollBarLocation(TerminalDisplay::SCROLLBAR_RIGHT);
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   return display;
}

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void ViewManager::applyProfile(TerminalDisplay* view , const QString& profileKey)
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{
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    Profile* info = SessionManager::instance()->profile(profileKey);

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    Q_ASSERT( info );

    const ColorScheme* colorScheme = ColorSchemeManager::instance()->
                                            findColorScheme(info->colorScheme());
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    if ( !colorScheme )
       colorScheme = ColorSchemeManager::instance()->defaultColorScheme(); 
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    Q_ASSERT( colorScheme );

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    // menu bar visibility
    emit setMenuBarVisible( info->property(Profile::ShowMenuBar).value<bool>() );

    // tab bar visibility
    ViewContainer* container = _viewSplitter->activeContainer();
    int tabBarMode = info->property(Profile::TabBarMode).value<int>();
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    int tabBarPosition = info->property(Profile::TabBarPosition).value<int>();

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    if ( tabBarMode == Profile::AlwaysHideTabBar )
        container->setNavigationDisplayMode(ViewContainer::AlwaysHideNavigation);
    else if ( tabBarMode == Profile::AlwaysShowTabBar )
        container->setNavigationDisplayMode(ViewContainer::AlwaysShowNavigation);
    else if ( tabBarMode == Profile::ShowTabBarAsNeeded )
        container->setNavigationDisplayMode(ViewContainer::ShowNavigationAsNeeded);

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    if ( tabBarPosition == Profile::TabBarTop )
        container->setNavigationPosition(ViewContainer::NavigationPositionTop);
    else if ( tabBarPosition == Profile::TabBarBottom )
        container->setNavigationPosition(ViewContainer::NavigationPositionBottom);

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    // load colour scheme
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    view->setColorTable(colorScheme->colorTable());
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    view->setOpacity(colorScheme->opacity());
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    // load font 
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    view->setVTFont(info->font());
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    // set scroll-bar position
    int scrollBarPosition = info->property(Profile::ScrollBarPosition).value<int>();

    if ( scrollBarPosition == Profile::ScrollBarHidden )
       view->setScrollBarLocation(TerminalDisplay::SCROLLBAR_NONE);
    else if ( scrollBarPosition == Profile::ScrollBarLeft )
       view->setScrollBarLocation(TerminalDisplay::SCROLLBAR_LEFT);
    else if ( scrollBarPosition == Profile::ScrollBarRight )
       view->setScrollBarLocation(TerminalDisplay::SCROLLBAR_RIGHT);
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    // terminal features
    bool blinkingCursor = info->property(Profile::BlinkingCursorEnabled).value<bool>();
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    view->setBlinkingCursor(blinkingCursor);  

    // cursor shape
    int cursorShape = info->property(Profile::CursorShape).value<int>();

    if ( cursorShape == Profile::BlockCursor )
        view->setKeyboardCursorShape(TerminalDisplay::BlockCursor);  
    else if ( cursorShape == Profile::IBeamCursor )
        view->setKeyboardCursorShape(TerminalDisplay::IBeamCursor);
    else if ( cursorShape == Profile::UnderlineCursor )
        view->setKeyboardCursorShape(TerminalDisplay::UnderlineCursor);

    // cursor color
    bool useCustomColor = info->property(Profile::UseCustomCursorColor).value<bool>();
    const QColor& cursorColor = info->property(Profile::CustomCursorColor).value<QColor>();
        
    view->setKeyboardCursorColor(!useCustomColor,cursorColor);

    // word characters
    view->setWordCharacters( info->property(Profile::WordCharacters).value<QString>() );
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}

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void ViewManager::updateViewsForSession(Session* session)
{
    QListIterator<QPointer<TerminalDisplay> > iter(_sessionMap.keys(session));
    while ( iter.hasNext() )
    {
        applyProfile(iter.next(),session->profileKey());
    }
}

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void ViewManager::profileChanged(const QString& key)
{
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    QHashIterator<QPointer<TerminalDisplay>,QPointer<Session> > iter(_sessionMap);
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    while ( iter.hasNext() )
    {
        iter.next();

        // if session uses this profile, update the display
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        if ( iter.key() != 0 && iter.value() != 0 && iter.value()->profileKey() == key )
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        {
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            applyProfile(iter.key(),key);
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        }
    }
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}

QList<ViewProperties*> ViewManager::viewProperties() const
{
    QList<ViewProperties*> list;

    ViewContainer* container = _viewSplitter->activeContainer();

    Q_ASSERT( container );

    QListIterator<QWidget*> viewIter(container->views());
    while ( viewIter.hasNext() )
    {
        ViewProperties* properties = container->viewProperties(viewIter.next());        Q_ASSERT( properties );
        list << properties; 
    } 
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    return list;
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}

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uint qHash(QPointer<TerminalDisplay> display)
{
    return qHash((TerminalDisplay*)display);
}

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#include "ViewManager.moc"