/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/

#include "precompiled_sfx2.hxx"

#include "sidebar/ControllerItem.hxx"

#include <sfx2/msgpool.hxx>
#include <sfx2/viewsh.hxx>
#include "sfx2/imagemgr.hxx"
#include "sfx2/bindings.hxx"
#include <unotools/cmdoptions.hxx>
#include "sfx2/sidebar/CommandInfoProvider.hxx"
#include <vcl/svapp.hxx>
#include <vcl/toolbox.hxx>
#include <vcl/help.hxx>

#include <com/sun/star/frame/XFrame.hpp>
#include <com/sun/star/frame/XFrameActionListener.hpp>


using namespace css;
using namespace cssu;


#define A2S(pString) (::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM(pString)))

namespace
{
    typedef ::cppu::WeakComponentImplHelper1 <
        css::frame::XFrameActionListener
        > FrameActionListenerInterfaceBase;

    class FrameActionListener
        : public ::cppu::BaseMutex,
          public FrameActionListenerInterfaceBase
    {
    public:
        FrameActionListener (
            sfx2::sidebar::ControllerItem& rControllerItem,
            const Reference<frame::XFrame>& rxFrame)
            : FrameActionListenerInterfaceBase(m_aMutex),
              mrControllerItem(rControllerItem),
              mxFrame(rxFrame)
        {
            if (mxFrame.is())
                mxFrame->addFrameActionListener(this);
        }
        virtual ~FrameActionListener (void)
        {
        }
        virtual void SAL_CALL disposing (void)
        {
            if (mxFrame.is())
                mxFrame->removeFrameActionListener(this);
        }
        virtual void SAL_CALL disposing (const css::lang::EventObject& rEvent)
            throw (cssu::RuntimeException)
        {
            (void)rEvent;
            mrControllerItem.ResetFrame();
            mxFrame = NULL;
        }
        virtual void SAL_CALL frameAction (const css::frame::FrameActionEvent& rEvent)
            throw (cssu::RuntimeException)
        {
            if (rEvent.Action == frame::FrameAction_CONTEXT_CHANGED)
                mrControllerItem.NotifyFrameContextChange();
        }

    private:
        sfx2::sidebar::ControllerItem& mrControllerItem;
        Reference<frame::XFrame> mxFrame;
    };
}

namespace sfx2 { namespace sidebar {

ControllerItem::ControllerItem (
    const sal_uInt16 nSlotId,
    SfxBindings &rBindings,
    ItemUpdateReceiverInterface& rItemUpdateReceiver)
    : SfxControllerItem(nSlotId, rBindings),
      mrItemUpdateReceiver(rItemUpdateReceiver),
      mxFrame(),
      mxFrameActionListener(),
      msCommandName()
{
}




ControllerItem::ControllerItem (
    const sal_uInt16 nSlotId,
    SfxBindings &rBindings,
    ItemUpdateReceiverInterface& rItemUpdateReceiver,
    const ::rtl::OUString& rsCommandName,
    const Reference<frame::XFrame>& rxFrame)
    : SfxControllerItem(nSlotId, rBindings),
      mrItemUpdateReceiver(rItemUpdateReceiver),
      mxFrame(rxFrame),
      mxFrameActionListener(new FrameActionListener(*this, mxFrame)),
      msCommandName(rsCommandName)
{
}




ControllerItem::~ControllerItem (void)
{
    if (mxFrameActionListener.is())
        mxFrameActionListener->dispose();
}




void ControllerItem::StateChanged (
    sal_uInt16 nSID,
    SfxItemState eState,
    const SfxPoolItem* pState)
{
    mrItemUpdateReceiver.NotifyItemUpdate(nSID, eState, pState, IsEnabled(eState));
}




bool ControllerItem::IsEnabled (SfxItemState eState) const
{
    if (eState == SFX_ITEM_DISABLED)
        return false;
    else if ( ! SvtCommandOptions().HasEntries(SvtCommandOptions::CMDOPTION_DISABLED))
    {
        // There are no disabled commands.
        return true;
    }
    else if (msCommandName.getLength() == 0)
    {
        // We were not given a command name at construction and can
        // not check the state now.  Assume the best and return true.
        return true;
    }
    else if (SvtCommandOptions().Lookup(SvtCommandOptions::CMDOPTION_DISABLED, msCommandName))
    {
        // The command is part of a list of disabled commands.
        return false;
    }
    else
        return true;
}




void ControllerItem::RequestUpdate (void)
{
    SfxPoolItem* pState = NULL;
    const SfxItemState eState (GetBindings().QueryState(GetId(), pState));
    mrItemUpdateReceiver.NotifyItemUpdate(GetId(), eState, pState, IsEnabled(eState));
}




void ControllerItem::NotifyFrameContextChange (void)
{
    RequestUpdate();
}




void ControllerItem::ResetFrame (void)
{
    mxFrame = NULL;
}




::rtl::OUString ControllerItem::GetLabel (void) const
{
    return CommandInfoProvider::Instance().GetLabelForCommand(
        A2S(".uno:")+msCommandName,
        mxFrame);
}




::rtl::OUString ControllerItem::GetHelpText (void) const
{
    Help* pHelp = Application::GetHelp();
    if (pHelp != NULL)
    {
        if (msCommandName.getLength() > 0)
        {
            const ::rtl::OUString sHelp (pHelp->GetHelpText(A2S(".uno:")+msCommandName, NULL));
            return sHelp;
        }
    }
    return ::rtl::OUString();
}



            
Image ControllerItem::GetIcon (void) const
{
    return GetIcon(Application::GetSettings().GetStyleSettings().GetHighContrastMode());
}




Image ControllerItem::GetIcon (const bool bIsHighContrastMode) const
{
    return GetImage(mxFrame, A2S(".uno:")+msCommandName, sal_False, bIsHighContrastMode);

}




void ControllerItem::SetupToolBoxItem (ToolBox& rToolBox, const sal_uInt16 nIndex)
{
    rToolBox.SetQuickHelpText(nIndex, GetLabel());
    rToolBox.SetHelpText(nIndex, GetHelpText());
    rToolBox.SetItemImage(nIndex, GetIcon());
}


} } // end of namespace sfx2::sidebar