/* -*- 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 <com/sun/star/awt/FontDescriptor.hpp>
#include <com/sun/star/frame/XFrame.hpp>
#include <com/sun/star/frame/status/FontHeight.hpp>
#include <com/sun/star/frame/XDispatchProvider.hpp>
#include <com/sun/star/beans/PropertyValue.hpp>
#include <com/sun/star/lang/XServiceInfo.hpp>
#include <com/sun/star/util/XURLTransformer.hpp>

#include <rtl/ref.hxx>
#include <vcl/event.hxx>
#include <vcl/svapp.hxx>
#include <vcl/window.hxx>
#include <vcl/settings.hxx>
#include <toolkit/helper/vclunohelper.hxx>
#include <svtools/ctrltool.hxx>
#include <svtools/ctrlbox.hxx>
#include <svtools/toolboxcontroller.hxx>
#include <cppuhelper/queryinterface.hxx>
#include <cppuhelper/supportsservice.hxx>

#include <memory>

#include <sfx2/InterimItemWindow.hxx>
#include <sfx2/sidebar/SidebarToolBox.hxx>
#include <boost/property_tree/ptree.hpp>

using namespace ::com::sun::star;

namespace {

class SvxFontSizeBox_Impl;
class FontHeightToolBoxControl : public svt::ToolboxController,
                                 public lang::XServiceInfo
{
    public:
        explicit FontHeightToolBoxControl(
            const css::uno::Reference< css::uno::XComponentContext >& rServiceManager );

        // XInterface
        virtual css::uno::Any SAL_CALL queryInterface( const css::uno::Type& aType ) override;
        virtual void SAL_CALL acquire() throw () override;
        virtual void SAL_CALL release() throw () override;

        // XServiceInfo
        virtual OUString SAL_CALL getImplementationName() override;
        virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
        virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;

        // XComponent
        virtual void SAL_CALL dispose() override;

        // XStatusListener
        virtual void SAL_CALL statusChanged( const css::frame::FeatureStateEvent& Event ) override;

        // XToolbarController
        virtual void SAL_CALL execute( sal_Int16 KeyModifier ) override;
        virtual void SAL_CALL click() override;
        virtual void SAL_CALL doubleClick() override;
        virtual css::uno::Reference< css::awt::XWindow > SAL_CALL createPopupWindow() override;
        virtual css::uno::Reference< css::awt::XWindow > SAL_CALL createItemWindow( const css::uno::Reference< css::awt::XWindow >& Parent ) override;

        void dispatchCommand( const css::uno::Sequence< css::beans::PropertyValue >& rArgs );
        using svt::ToolboxController::dispatchCommand;

    private:
        VclPtr<SvxFontSizeBox_Impl>           m_pBox;
        css::awt::FontDescriptor m_aCurrentFont;
};

class SvxFontSizeBox_Impl final : public InterimItemWindow
{
public:
                        SvxFontSizeBox_Impl( vcl::Window* pParent,
                                             const uno::Reference< frame::XFrame >& _xFrame,
                                             FontHeightToolBoxControl& rCtrl );

    virtual void        dispose() override;
    virtual             ~SvxFontSizeBox_Impl() override;
    void                statusChanged_Impl( long nHeight, bool bErase );
    void                UpdateFont( const css::awt::FontDescriptor& rCurrentFont );
    void                SetOptimalSize();

    virtual void        DataChanged( const DataChangedEvent& rDCEvt ) override;
    virtual void        GetFocus() override;

private:
    FontHeightToolBoxControl&                  m_rCtrl;
    OUString                                   m_aCurText;
    bool                                       m_bRelease;
    uno::Reference< frame::XFrame >            m_xFrame;
    std::unique_ptr<FontSizeBox>            m_xWidget;

    void                ReleaseFocus_Impl();

    void                Select();

    DECL_LINK(SelectHdl, weld::ComboBox&, void);
    DECL_LINK(KeyInputHdl, const KeyEvent&, bool);
    DECL_LINK(ActivateHdl, weld::ComboBox&, bool);
    DECL_LINK(FocusOutHdl, weld::Widget&, void);
    DECL_LINK(DumpAsPropertyTreeHdl, boost::property_tree::ptree&, void);
};

SvxFontSizeBox_Impl::SvxFontSizeBox_Impl(
    vcl::Window*                                      _pParent,
    const uno::Reference< frame::XFrame >&            _xFrame,
    FontHeightToolBoxControl&                         _rCtrl ) :

    InterimItemWindow(_pParent, "svx/ui/fontsizebox.ui", "FontSizeBox"),

    m_rCtrl             ( _rCtrl ),
    m_bRelease          ( true ),
    m_xFrame            ( _xFrame ),
    m_xWidget(new FontSizeBox(m_xBuilder->weld_combo_box("fontsizecombobox")))
{
    m_xWidget->set_value(0);
    m_xWidget->set_active_text("");
    m_xWidget->disable_entry_completion();

    m_xWidget->connect_changed(LINK(this, SvxFontSizeBox_Impl, SelectHdl));
    m_xWidget->connect_key_press(LINK(this, SvxFontSizeBox_Impl, KeyInputHdl));
    m_xWidget->connect_entry_activate(LINK(this, SvxFontSizeBox_Impl, ActivateHdl));
    m_xWidget->connect_focus_out(LINK(this, SvxFontSizeBox_Impl, FocusOutHdl));
    m_xWidget->connect_get_property_tree(LINK(this, SvxFontSizeBox_Impl, DumpAsPropertyTreeHdl));
}

void SvxFontSizeBox_Impl::dispose()
{
    m_xWidget.reset();
    InterimItemWindow::dispose();
}

SvxFontSizeBox_Impl::~SvxFontSizeBox_Impl()
{
    disposeOnce();
}

void SvxFontSizeBox_Impl::GetFocus()
{
    if (m_xWidget)
        m_xWidget->grab_focus();
    InterimItemWindow::GetFocus();
}

void SvxFontSizeBox_Impl::ReleaseFocus_Impl()
{
    if ( !m_bRelease )
    {
        m_bRelease = true;
        return;
    }

    if ( m_xFrame.is() && m_xFrame->getContainerWindow().is() )
        m_xFrame->getContainerWindow()->setFocus();
}

IMPL_LINK(SvxFontSizeBox_Impl, SelectHdl, weld::ComboBox&, rCombo, void)
{
    if (rCombo.changed_by_direct_pick()) // only when picked from the list
        Select();
}

IMPL_LINK_NOARG(SvxFontSizeBox_Impl, ActivateHdl, weld::ComboBox&, bool)
{
    Select();
    return true;
}

void SvxFontSizeBox_Impl::Select()
{
    sal_Int64 nSelVal = m_xWidget->get_value();
    float fSelVal     = float( nSelVal ) / 10;

    uno::Sequence< beans::PropertyValue > aArgs( 1 );
    aArgs[0].Name  = "FontHeight.Height";
    aArgs[0].Value <<= fSelVal;

    /*  #i33380# DR 2004-09-03 Moved the following line above the Dispatch() call.
        This instance may be deleted in the meantime (i.e. when a dialog is opened
        while in Dispatch()), accessing members will crash in this case. */
    ReleaseFocus_Impl();

    m_rCtrl.dispatchCommand( aArgs );
}

void SvxFontSizeBox_Impl::statusChanged_Impl( long nPoint, bool bErase )
{
    if ( !bErase )
    {
        // convert the metric
        long nVal = nPoint;

        // changed => set new value
        if (m_xWidget->get_value() != nVal)
            m_xWidget->set_value(nVal);
    }
    else
    {
        // delete value in the display
        m_xWidget->set_value(-1L);
        m_xWidget->set_active_text("");
    }
    m_xWidget->save_value();
}

void SvxFontSizeBox_Impl::UpdateFont( const css::awt::FontDescriptor& rCurrentFont )
{
    // filling up the sizes list
    auto nOldVal = m_xWidget->get_value(); // memorize old value
    const FontList* _pFontList = nullptr;
    std::unique_ptr<FontList> aHold( new FontList( this ));
    _pFontList = aHold.get();

    if ( !rCurrentFont.Name.isEmpty() )
    {
        FontMetric _aFontMetric;
        _aFontMetric.SetFamilyName( rCurrentFont.Name );
        _aFontMetric.SetStyleName( rCurrentFont.StyleName );
        _aFontMetric.SetFontHeight( rCurrentFont.Height );
        m_xWidget->Fill(&_aFontMetric, _pFontList);
    }
    else
    {
        m_xWidget->Fill(nullptr, _pFontList);
    }
    m_xWidget->set_value(nOldVal); // restore old value
    m_aCurText = m_xWidget->get_active_text(); // memorize to reset at ESC
}

IMPL_LINK(SvxFontSizeBox_Impl, KeyInputHdl, const KeyEvent&, rKEvt, bool)
{
    bool bHandled = false;

    sal_uInt16 nCode = rKEvt.GetKeyCode().GetCode();

    switch (nCode)
    {
        case KEY_TAB:
            m_bRelease = false;
            Select();
            break;

        case KEY_ESCAPE:
            m_xWidget->set_active_text(m_aCurText);
            if ( typeid( *GetParent() ) != typeid( sfx2::sidebar::SidebarToolBox ) )
                ReleaseFocus_Impl();
            bHandled = true;
            break;
    }

    return bHandled || ChildKeyInput(rKEvt);
}

IMPL_LINK_NOARG(SvxFontSizeBox_Impl, FocusOutHdl, weld::Widget&, void)
{
    if (!m_xWidget->has_focus()) // a combobox can be comprised of different subwidget so double-check if none of those has focus
        m_xWidget->set_value(m_xWidget->get_saved_value());
}

void SvxFontSizeBox_Impl::SetOptimalSize()
{
    SetSizePixel(get_preferred_size());
}

void SvxFontSizeBox_Impl::DataChanged( const DataChangedEvent& rDCEvt )
{
    if ( (rDCEvt.GetType() == DataChangedEventType::SETTINGS) &&
         (rDCEvt.GetFlags() & AllSettingsFlags::STYLE) )
    {
        SetOptimalSize();
    }
}

IMPL_LINK(SvxFontSizeBox_Impl, DumpAsPropertyTreeHdl, boost::property_tree::ptree&, rTree, void)
{
    boost::property_tree::ptree aEntries;

    for (int i = 0, nCount = m_xWidget->get_count(); i < nCount; ++i)
    {
        boost::property_tree::ptree aEntry;
        aEntry.put("", m_xWidget->get_text(i));
        aEntries.push_back(std::make_pair("", aEntry));
    }

    rTree.add_child("entries", aEntries);

    boost::property_tree::ptree aSelected;

    int nActive = m_xWidget->get_active();
    if (nActive != -1)
    {
        boost::property_tree::ptree aEntry;
        aEntry.put("", nActive);
        aSelected.push_back(std::make_pair("", aEntry));
    }

    rTree.put("selectedCount", nActive == -1 ? 0 : 1);
    rTree.add_child("selectedEntries", aSelected);

    rTree.put("command", ".uno:FontHeight");
}

FontHeightToolBoxControl::FontHeightToolBoxControl( const uno::Reference< uno::XComponentContext >& rxContext )
 : svt::ToolboxController( rxContext,
                           uno::Reference< frame::XFrame >(),
                           ".uno:FontHeight" ),
   m_pBox( nullptr )
{
    addStatusListener( ".uno:CharFontName");
}

// XInterface
css::uno::Any SAL_CALL FontHeightToolBoxControl::queryInterface( const css::uno::Type& aType )
{
    uno::Any a = ToolboxController::queryInterface( aType );
    if ( a.hasValue() )
        return a;

    return ::cppu::queryInterface( aType, static_cast< lang::XServiceInfo* >( this ));
}

void SAL_CALL FontHeightToolBoxControl::acquire() throw ()
{
    ToolboxController::acquire();
}

void SAL_CALL FontHeightToolBoxControl::release() throw ()
{
    ToolboxController::release();
}

// XServiceInfo
sal_Bool SAL_CALL FontHeightToolBoxControl::supportsService( const OUString& ServiceName )
{
    return cppu::supportsService(this, ServiceName);
}

OUString SAL_CALL FontHeightToolBoxControl::getImplementationName()
{
    return "com.sun.star.svx.FontHeightToolBoxController";
}

uno::Sequence< OUString > SAL_CALL FontHeightToolBoxControl::getSupportedServiceNames(  )
{
    return { "com.sun.star.frame.ToolbarController" };
}

// XComponent
void SAL_CALL FontHeightToolBoxControl::dispose()
{
    svt::ToolboxController::dispose();

    SolarMutexGuard aSolarMutexGuard;
    m_pBox.disposeAndClear();
}

// XStatusListener
void SAL_CALL FontHeightToolBoxControl::statusChanged(
    const frame::FeatureStateEvent& rEvent )
{
    if ( m_pBox )
    {
        SolarMutexGuard aSolarMutexGuard;
        if ( rEvent.FeatureURL.Path == "FontHeight" )
        {
            ToolBox* pToolBox = nullptr;
            sal_uInt16 nId = 0;
            if ( !getToolboxId( nId, &pToolBox ) )
                return;

            if ( rEvent.IsEnabled )
            {
                m_pBox->Enable();
                frame::status::FontHeight aFontHeight;
                if ( rEvent.State >>= aFontHeight )
                    m_pBox->statusChanged_Impl( long( 10. * aFontHeight.Height ), false );
                else
                    m_pBox->statusChanged_Impl( long( -1 ), true );
            }
            else
            {
                m_pBox->Disable();
                m_pBox->statusChanged_Impl( long( -1 ), true );
            }

            pToolBox->EnableItem( nId, rEvent.IsEnabled );
        }
        else if ( rEvent.FeatureURL.Path == "CharFontName" )
        {
            if ( rEvent.State >>= m_aCurrentFont )
                m_pBox->UpdateFont( m_aCurrentFont );
        }
    }
}

// XToolbarController
void SAL_CALL FontHeightToolBoxControl::execute( sal_Int16 /*KeyModifier*/ )
{
}

void SAL_CALL FontHeightToolBoxControl::click()
{
}

void SAL_CALL FontHeightToolBoxControl::doubleClick()
{
}

uno::Reference< awt::XWindow > SAL_CALL FontHeightToolBoxControl::createPopupWindow()
{
    return uno::Reference< awt::XWindow >();
}

uno::Reference< awt::XWindow > SAL_CALL FontHeightToolBoxControl::createItemWindow(
    const uno::Reference< awt::XWindow >& xParent )
{
    uno::Reference< awt::XWindow > xItemWindow;

    VclPtr<vcl::Window> pParent = VCLUnoHelper::GetWindow( xParent );
    if ( pParent )
    {
        SolarMutexGuard aSolarMutexGuard;
        m_pBox = VclPtr<SvxFontSizeBox_Impl>::Create( pParent, m_xFrame, *this );
        //Get the box to fill itself with all its sizes
        m_pBox->UpdateFont(m_aCurrentFont);
        //Make it size itself to its optimal size re above sizes
        m_pBox->SetOptimalSize();
        xItemWindow = VCLUnoHelper::GetInterface( m_pBox );
    }

    return xItemWindow;
}

void FontHeightToolBoxControl::dispatchCommand(
    const uno::Sequence< beans::PropertyValue >& rArgs )
{
    uno::Reference< frame::XDispatchProvider > xDispatchProvider( m_xFrame, uno::UNO_QUERY );
    if ( xDispatchProvider.is() )
    {
        util::URL                               aURL;
        uno::Reference< frame::XDispatch >      xDispatch;
        uno::Reference< util::XURLTransformer > xURLTransformer = getURLTransformer();

        aURL.Complete = ".uno:FontHeight";
        xURLTransformer->parseStrict( aURL );
        xDispatch = xDispatchProvider->queryDispatch( aURL, OUString(), 0 );
        if ( xDispatch.is() )
            xDispatch->dispatch( aURL, rArgs );
    }
}

}

extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface *
com_sun_star_svx_FontHeightToolBoxController_get_implementation(
    css::uno::XComponentContext *rxContext,
    css::uno::Sequence<css::uno::Any> const &)
{
    return cppu::acquire(new FontHeightToolBoxControl(rxContext));
}

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