/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   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 .
 */

#include <accessibility/accessiblemenubasecomponent.hxx>
#include <accessibility/vclxaccessiblemenu.hxx>
#include <accessibility/vclxaccessiblemenuitem.hxx>
#include <accessibility/vclxaccessiblemenuseparator.hxx>

#include <com/sun/star/accessibility/AccessibleEventId.hpp>
#include <com/sun/star/accessibility/AccessibleRole.hpp>
#include <com/sun/star/accessibility/AccessibleStateType.hpp>
#include <comphelper/accessiblecontexthelper.hxx>
#include <cppuhelper/supportsservice.hxx>
#include <o3tl/safeint.hxx>
#include <vcl/menu.hxx>
#include <vcl/unohelp.hxx>
#include <vcl/vclevent.hxx>

#include <array>

using namespace ::com::sun::star;
using namespace ::com::sun::star::lang;
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::accessibility;
using namespace ::comphelper;


// OAccessibleMenuBaseComponent


OAccessibleMenuBaseComponent::OAccessibleMenuBaseComponent( Menu* pMenu )
    :m_pMenu( pMenu )
    ,m_bEnabled( false )
    ,m_bFocused( false )
    ,m_bVisible( false )
    ,m_bSelected( false )
    ,m_bChecked( false )
{
    if ( m_pMenu )
    {
        m_aAccessibleChildren.assign( m_pMenu->GetItemCount(), rtl::Reference< OAccessibleMenuItemComponent >() );
        m_pMenu->AddEventListener( LINK( this, OAccessibleMenuBaseComponent, MenuEventListener ) );
    }
}


OAccessibleMenuBaseComponent::~OAccessibleMenuBaseComponent()
{
    if ( m_pMenu )
        m_pMenu->RemoveEventListener( LINK( this, OAccessibleMenuBaseComponent, MenuEventListener ) );
}


bool OAccessibleMenuBaseComponent::IsEnabled()
{
    return false;
}


bool OAccessibleMenuBaseComponent::IsFocused()
{
    return false;
}


bool OAccessibleMenuBaseComponent::IsVisible()
{
    return false;
}


bool OAccessibleMenuBaseComponent::IsSelected()
{
    return false;
}


bool OAccessibleMenuBaseComponent::IsChecked()
{
    return false;
}


void OAccessibleMenuBaseComponent::SetStates()
{
    m_bEnabled = IsEnabled();
    m_bFocused = IsFocused();
    m_bVisible = IsVisible();
    m_bSelected = IsSelected();
    m_bChecked = IsChecked();
}


void OAccessibleMenuBaseComponent::SetEnabled( bool bEnabled )
{
    if ( m_bEnabled == bEnabled )
        return;

    sal_Int64 nStateType=AccessibleStateType::ENABLED;
    if (IsMenuHideDisabledEntries())
    {
        nStateType = AccessibleStateType::VISIBLE;
    }
    std::array<Any, 2> aOldValue, aNewValue;
    if ( m_bEnabled )
    {
        aOldValue[0] <<= AccessibleStateType::SENSITIVE;
        aOldValue[1] <<= nStateType;
    }
    else
    {
        aNewValue[0] <<= nStateType;
        aNewValue[1] <<= AccessibleStateType::SENSITIVE;
    }
    m_bEnabled = bEnabled;
    NotifyAccessibleEvent( AccessibleEventId::STATE_CHANGED, aOldValue[0], aNewValue[0] );
    NotifyAccessibleEvent( AccessibleEventId::STATE_CHANGED, aOldValue[1], aNewValue[1] );
}


void OAccessibleMenuBaseComponent::SetFocused( bool bFocused )
{
    if ( m_bFocused != bFocused )
    {
        Any aOldValue, aNewValue;
        if ( m_bFocused )
            aOldValue <<= AccessibleStateType::FOCUSED;
        else
            aNewValue <<= AccessibleStateType::FOCUSED;
        m_bFocused = bFocused;
        NotifyAccessibleEvent( AccessibleEventId::STATE_CHANGED, aOldValue, aNewValue );
    }
}


void OAccessibleMenuBaseComponent::SetVisible( bool bVisible )
{
    if ( m_bVisible != bVisible )
    {
        Any aOldValue, aNewValue;
        if ( m_bVisible )
            aOldValue <<= AccessibleStateType::VISIBLE;
        else
            aNewValue <<= AccessibleStateType::VISIBLE;
        m_bVisible = bVisible;
        NotifyAccessibleEvent( AccessibleEventId::STATE_CHANGED, aOldValue, aNewValue );
    }
}


void OAccessibleMenuBaseComponent::SetSelected( bool bSelected )
{
    if ( m_bSelected != bSelected )
    {
        Any aOldValue, aNewValue;
        if ( m_bSelected )
            aOldValue <<= AccessibleStateType::SELECTED;
        else
            aNewValue <<= AccessibleStateType::SELECTED;
        m_bSelected = bSelected;
        NotifyAccessibleEvent( AccessibleEventId::STATE_CHANGED, aOldValue, aNewValue );
    }
}


void OAccessibleMenuBaseComponent::SetChecked( bool bChecked )
{
    if ( m_bChecked != bChecked )
    {
        Any aOldValue, aNewValue;
        if ( m_bChecked )
            aOldValue <<= AccessibleStateType::CHECKED;
        else
            aNewValue <<= AccessibleStateType::CHECKED;
        m_bChecked = bChecked;
        NotifyAccessibleEvent( AccessibleEventId::STATE_CHANGED, aOldValue, aNewValue );
    }
}


void OAccessibleMenuBaseComponent::UpdateEnabled( sal_Int32 i, bool bEnabled )
{
    if ( i >= 0 && o3tl::make_unsigned(i) < m_aAccessibleChildren.size() )
    {
        rtl::Reference< OAccessibleMenuBaseComponent > xChild( m_aAccessibleChildren[i] );
        if ( xChild.is() )
            xChild->SetEnabled( bEnabled );
    }
}


void OAccessibleMenuBaseComponent::UpdateFocused( sal_Int32 i, bool bFocused )
{
    if ( i >= 0 && o3tl::make_unsigned(i) < m_aAccessibleChildren.size() )
    {
        rtl::Reference< OAccessibleMenuBaseComponent > xChild( m_aAccessibleChildren[i] );
        if ( xChild.is() )
            xChild->SetFocused( bFocused );
    }
}


void OAccessibleMenuBaseComponent::UpdateVisible()
{
    SetVisible( IsVisible() );
    for (const rtl::Reference<OAccessibleMenuItemComponent>& xChild : m_aAccessibleChildren)
    {
        if ( xChild.is() )
            xChild->SetVisible( xChild->IsVisible() );
    }
}


void OAccessibleMenuBaseComponent::UpdateSelected( sal_Int32 i, bool bSelected )
{
    NotifyAccessibleEvent( AccessibleEventId::SELECTION_CHANGED, Any(), Any() );

    if ( i >= 0 && o3tl::make_unsigned(i) < m_aAccessibleChildren.size() )
    {
        rtl::Reference< OAccessibleMenuBaseComponent > xChild( m_aAccessibleChildren[i] );
        if ( xChild.is() )
            xChild->SetSelected( bSelected );
    }
}


void OAccessibleMenuBaseComponent::UpdateChecked( sal_Int32 i, bool bChecked )
{
    if ( i >= 0 && o3tl::make_unsigned(i) < m_aAccessibleChildren.size() )
    {
        rtl::Reference< OAccessibleMenuBaseComponent > xChild( m_aAccessibleChildren[i] );
        if ( xChild.is() )
            xChild->SetChecked( bChecked );
    }
}


void OAccessibleMenuBaseComponent::UpdateAccessibleName( sal_Int32 i )
{
    if ( i >= 0 && o3tl::make_unsigned(i) < m_aAccessibleChildren.size() )
    {
        rtl::Reference< OAccessibleMenuBaseComponent > xChild( m_aAccessibleChildren[i] );
        if ( xChild.is() )
        {
            OAccessibleMenuItemComponent* pComp = static_cast< OAccessibleMenuItemComponent* >( xChild.get() );
            if ( pComp )
                pComp->SetAccessibleName( pComp->GetAccessibleName() );
        }
    }
}

void OAccessibleMenuBaseComponent::UpdateItemRole(sal_Int32 i)
{
    if (i < 0 || o3tl::make_unsigned(i) >= m_aAccessibleChildren.size())
        return;

    rtl::Reference<OAccessibleMenuItemComponent> xChild(m_aAccessibleChildren[i]);
    if (!xChild.is())
        return;

    xChild->NotifyAccessibleEvent(AccessibleEventId::ROLE_CHANGED, Any(), Any());
}

void OAccessibleMenuBaseComponent::UpdateItemText( sal_Int32 i )
{
    if ( i >= 0 && o3tl::make_unsigned(i) < m_aAccessibleChildren.size() )
    {
        rtl::Reference< OAccessibleMenuItemComponent > xChild( m_aAccessibleChildren[i] );
        if ( xChild.is() )
            xChild->SetItemText( xChild->GetItemText() );
    }
}


sal_Int64 OAccessibleMenuBaseComponent::GetChildCount() const
{
    return m_aAccessibleChildren.size();
}


rtl::Reference<comphelper::OAccessible> OAccessibleMenuBaseComponent::GetChild( sal_Int64 i )
{
    rtl::Reference< OAccessibleMenuItemComponent > xChild = m_aAccessibleChildren[i];
    if ( !xChild.is() )
    {
        if ( m_pMenu )
        {
            // create a new child
            if ( m_pMenu->GetItemType( static_cast<sal_uInt16>(i) ) == MenuItemType::SEPARATOR )
            {
                xChild = new VCLXAccessibleMenuSeparator(m_pMenu, static_cast<sal_uInt16>(i));
            }
            else
            {
                PopupMenu* pPopupMenu = m_pMenu->GetPopupMenu( m_pMenu->GetItemId( static_cast<sal_uInt16>(i) ) );
                if ( pPopupMenu )
                {
                    xChild = new VCLXAccessibleMenu(m_pMenu, static_cast<sal_uInt16>(i), pPopupMenu);
                    pPopupMenu->SetAccessible(xChild);
                }
                else
                {
                    xChild = new VCLXAccessibleMenuItem(m_pMenu, static_cast<sal_uInt16>(i));
                }
            }

            // set states
            xChild->SetStates();

            // insert into menu item list
            m_aAccessibleChildren[i] = xChild;
        }
    }

    return xChild;
}


Reference< XAccessible > OAccessibleMenuBaseComponent::GetChildAt( const awt::Point& rPoint )
{
    for ( sal_Int64 i = 0, nCount = getAccessibleChildCount(); i < nCount; ++i )
    {
        Reference< XAccessible > xAcc = getAccessibleChild( i );
        if ( xAcc.is() )
        {
            Reference< XAccessibleComponent > xComp( xAcc->getAccessibleContext(), UNO_QUERY );
            if ( xComp.is() )
            {
                tools::Rectangle aRect = vcl::unohelper::ConvertToVCLRect(xComp->getBounds());
                Point aPos = vcl::unohelper::ConvertToVCLPoint(rPoint);
                if ( aRect.Contains( aPos ) )
                {
                    return xAcc;
                }
            }
        }
    }

    return nullptr;
}


void OAccessibleMenuBaseComponent::InsertChild( sal_Int32 i )
{
    if ( i < 0 )
        return;

    if ( o3tl::make_unsigned(i) > m_aAccessibleChildren.size() )
        i = m_aAccessibleChildren.size();

    // insert entry in child list
    m_aAccessibleChildren.insert( m_aAccessibleChildren.begin() + i, rtl::Reference< OAccessibleMenuItemComponent >() );

    // update item position of accessible children
    for ( sal_uInt32 j = i, nCount = m_aAccessibleChildren.size(); j < nCount; ++j )
    {
        rtl::Reference< OAccessibleMenuItemComponent > xAcc( m_aAccessibleChildren[j] );
        if ( xAcc.is() )
            xAcc->SetItemPos( static_cast<sal_uInt16>(j) );
    }

    // send accessible child event
    Reference< XAccessible > xChild( GetChild( i ) );
    if ( xChild.is() )
    {
        Any aOldValue, aNewValue;
        aNewValue <<= xChild;
        NotifyAccessibleEvent( AccessibleEventId::CHILD, aOldValue, aNewValue );
    }
}


void OAccessibleMenuBaseComponent::RemoveChild( sal_Int32 i )
{
    if ( i < 0 || o3tl::make_unsigned(i) >= m_aAccessibleChildren.size() )
        return;

    // keep the accessible of the removed item
    rtl::Reference< OAccessibleMenuItemComponent > xChild( m_aAccessibleChildren[i] );

    // remove entry in child list
    m_aAccessibleChildren.erase( m_aAccessibleChildren.begin() + i );

    // update item position of accessible children
    for ( sal_uInt32 j = i, nCount = m_aAccessibleChildren.size(); j < nCount; ++j )
    {
        rtl::Reference< OAccessibleMenuItemComponent > xAcc( m_aAccessibleChildren[j] );
        if ( xAcc.is() )
            xAcc->SetItemPos( static_cast<sal_uInt16>(j) );
    }

    // send accessible child event
    if ( xChild.is() )
    {
        Any aOldValue, aNewValue;
        aOldValue <<= uno::Reference<XAccessible>(xChild);
        NotifyAccessibleEvent( AccessibleEventId::CHILD, aOldValue, aNewValue );

        xChild->dispose();
    }
}


bool OAccessibleMenuBaseComponent::IsHighlighted()
{
    return false;
}


bool OAccessibleMenuBaseComponent::IsChildHighlighted()
{
    bool bChildHighlighted = false;

    for (const rtl::Reference<OAccessibleMenuItemComponent>& xChild : m_aAccessibleChildren)
    {
        if ( xChild.is() && xChild->IsHighlighted() )
        {
            bChildHighlighted = true;
            break;
        }
    }

    return bChildHighlighted;
}


void OAccessibleMenuBaseComponent::SelectChild( sal_Int32 i )
{
    // open the menu
    if ( getAccessibleRole() == AccessibleRole::MENU && !IsPopupMenuOpen() )
        Click();

    // highlight the child
    if ( m_pMenu )
        m_pMenu->HighlightItem( static_cast<sal_uInt16>(i) );
}


void OAccessibleMenuBaseComponent::DeSelectAll()
{
    if ( m_pMenu )
        m_pMenu->DeHighlight();
}


bool OAccessibleMenuBaseComponent::IsChildSelected( sal_Int32 i )
{
    bool bSelected = false;

    if ( m_pMenu && m_pMenu->IsHighlighted( static_cast<sal_uInt16>(i) ) )
        bSelected = true;

    return bSelected;
}


void OAccessibleMenuBaseComponent::Click()
{
}


bool OAccessibleMenuBaseComponent::IsPopupMenuOpen()
{
    return false;
}


IMPL_LINK( OAccessibleMenuBaseComponent, MenuEventListener, VclMenuEvent&, rEvent, void )
{
    OSL_ENSURE( rEvent.GetMenu(), "OAccessibleMenuBaseComponent - Menu?" );
    ProcessMenuEvent( rEvent );
}


void OAccessibleMenuBaseComponent::ProcessMenuEvent( const VclMenuEvent& rVclMenuEvent )
{
    sal_uInt16 nItemPos = rVclMenuEvent.GetItemPos();

    switch ( rVclMenuEvent.GetId() )
    {
        case VclEventId::MenuShow:
        case VclEventId::MenuHide:
        {
            UpdateVisible();
        }
        break;
        case VclEventId::MenuHighlight:
        {
            SetFocused( false );
            UpdateFocused( nItemPos, true );
            UpdateSelected( nItemPos, true );
        }
        break;
        case VclEventId::MenuDehighlight:
        {
            UpdateFocused( nItemPos, false );
            UpdateSelected( nItemPos, false );
        }
        break;
        case VclEventId::MenuSubmenuActivate:
        {
        }
        break;
        case VclEventId::MenuSubmenuDeactivate:
        {
            UpdateFocused( nItemPos, true );
        }
        break;
        case VclEventId::MenuEnable:
        {
            UpdateEnabled( nItemPos, true );
        }
        break;
        case VclEventId::MenuDisable:
        {
            UpdateEnabled( nItemPos, false );
        }
        break;
        case VclEventId::MenuSubmenuChanged:
        {
            RemoveChild( nItemPos );
            InsertChild( nItemPos );
        }
        break;
        case VclEventId::MenuInsertItem:
        {
            InsertChild( nItemPos );
        }
        break;
        case VclEventId::MenuRemoveItem:
        {
            RemoveChild( nItemPos );
        }
        break;
        case VclEventId::MenuAccessibleNameChanged:
        {
            UpdateAccessibleName( nItemPos );
        }
        break;
        case VclEventId::MenuItemRoleChanged:
        {
            UpdateItemRole(nItemPos);
        }
        break;
        case VclEventId::MenuItemTextChanged:
        {
            UpdateAccessibleName( nItemPos );
            UpdateItemText( nItemPos );
        }
        break;
        case VclEventId::MenuItemChecked:
        {
            UpdateChecked( nItemPos, true );
        }
        break;
        case VclEventId::MenuItemUnchecked:
        {
            UpdateChecked( nItemPos, false );
        }
        break;
        case VclEventId::ObjectDying:
        {
            if ( m_pMenu )
            {
                m_pMenu->RemoveEventListener( LINK( this, OAccessibleMenuBaseComponent, MenuEventListener ) );

                m_pMenu = nullptr;

                // dispose all menu items
                for (const rtl::Reference<OAccessibleMenuItemComponent>& xComponent : m_aAccessibleChildren)
                {
                    if ( xComponent.is() )
                        xComponent->dispose();
                }
                m_aAccessibleChildren.clear();
            }
        }
        break;
        default:
        {
        }
        break;
    }
}


// XComponent


void OAccessibleMenuBaseComponent::disposing()
{
    OAccessible::disposing();

    if ( !m_pMenu )
        return;

    m_pMenu->RemoveEventListener( LINK( this, OAccessibleMenuBaseComponent, MenuEventListener ) );

    m_pMenu = nullptr;

    // dispose all menu items
    for (const rtl::Reference<OAccessibleMenuItemComponent>& xComponent : m_aAccessibleChildren)
    {
        if ( xComponent.is() )
            xComponent->dispose();
    }
    m_aAccessibleChildren.clear();
}


// XServiceInfo


sal_Bool OAccessibleMenuBaseComponent::supportsService( const OUString& rServiceName )
{
    return cppu::supportsService(this, rServiceName);
}

// XAccessibleContext


sal_Int64 OAccessibleMenuBaseComponent::getAccessibleStateSet(  )
{
    OExternalLockGuard aGuard( this );

    sal_Int64 nStateSet = 0;

    if (isAlive())
        FillAccessibleStateSet( nStateSet );
    else
        nStateSet |= AccessibleStateType::DEFUNC;

    return nStateSet;
}


bool OAccessibleMenuBaseComponent::IsMenuHideDisabledEntries()
{
    return false;
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
