/* -*- 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 <vcl/layout.hxx>
#include <vcl/svapp.hxx>
#include <vcl/settings.hxx>

#include <tools/stream.hxx>
#include <rtl/bootstrap.hxx>
#include <unotools/configmgr.hxx>
#include <unotools/bootstrap.hxx>
#include <com/sun/star/uno/Any.h>
#include <vcl/graph.hxx>
#include <vcl/graphicfilter.hxx>
#include <svtools/langhelp.hxx>

#include "com/sun/star/system/SystemShellExecuteFlags.hpp"
#include "com/sun/star/system/SystemShellExecute.hpp"
#include <comphelper/processfactory.hxx>
#include "comphelper/anytostring.hxx"
#include "cppuhelper/exc_hlp.hxx"
#include "cppuhelper/bootstrap.hxx"
#include <basegfx/numeric/ftools.hxx>
#include <com/sun/star/geometry/RealRectangle2D.hpp>
#include <svtools/optionsdrawinglayer.hxx>

#include <sfx2/sfxuno.hxx>
#include <sfx2/sfxcommands.h>
#include "about.hxx"
#include <config_buildid.h>
#include <sfx2/sfxdefs.hxx>
#include <sfx2/app.hxx>
#include <rtl/ustrbuf.hxx>
#include <vcl/bitmap.hxx>
#include <officecfg/Office/Common.hxx>

using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::beans;
using namespace ::com::sun::star;

enum AboutDialogButton
{
    CREDITS_BUTTON,
    WEBSITE_BUTTON
};

AboutDialog::AboutDialog(vcl::Window* pParent)
    : SfxModalDialog(pParent, "AboutDialog", "cui/ui/aboutdialog.ui")
{
    get(m_pLogoReplacement, "logoreplacement");
    get(m_pLogoImage, "logo");
    get(m_pVersion, "version");
    get(m_pDescriptionText, "description");
    get(m_pCopyrightText, "copyright");
    m_aCopyrightTextStr = m_pCopyrightText->GetText();
    get(m_pWebsiteButton, "website");
    get(m_pCreditsButton, "credits");
    m_aCreditsLinkStr = get<FixedText>("link")->GetText();
    m_sBuildStr = get<FixedText>("buildid")->GetText();
    m_aVendorTextStr = get<FixedText>("vendor")->GetText();
    m_aVersionTextStr = m_pVersion->GetText();
    m_aBasedTextStr = get<FixedText>("libreoffice")->GetText();
    m_aBasedDerivedTextStr = get<FixedText>("derived")->GetText();
    m_pLocaleStr = get<FixedText>("locale")->GetText();;

    m_pVersion->SetText(GetVersionString());

    OUString aCopyrightString = GetCopyrightString();
    m_pCopyrightText->SetText( aCopyrightString );

    StyleControls();

    SetLogo();

    // Allow the button to be identifiable once they are clicked
    m_pCreditsButton->SetData( reinterpret_cast<void*>(CREDITS_BUTTON) );
    m_pWebsiteButton->SetData( reinterpret_cast<void*>(WEBSITE_BUTTON) );

    // Connect all handlers
    m_pCreditsButton->SetClickHdl( LINK( this, AboutDialog, HandleClick ) );
    m_pWebsiteButton->SetClickHdl( LINK( this, AboutDialog, HandleClick ) );

    get<PushButton>("close")->GrabFocus();
}

IMPL_LINK( AboutDialog, HandleClick, PushButton*, pButton )
{
    OUString sURL = "";

    // Find which button was pressed and from this, get the URL to be opened
    AboutDialogButton aDialogButton = static_cast<AboutDialogButton>(reinterpret_cast<sal_Int64>(pButton->GetData()));
    if ( aDialogButton == CREDITS_BUTTON )
        sURL = m_aCreditsLinkStr;
    else if ( aDialogButton == WEBSITE_BUTTON )
    {
        sURL = officecfg::Office::Common::Help::StartCenter::InfoURL::get();
        localizeWebserviceURI(sURL);
    }

    // If the URL is empty, don't do anything
    if ( sURL.isEmpty() )
        return 1;
    try
    {
        Reference< com::sun::star::system::XSystemShellExecute > xSystemShellExecute(
            com::sun::star::system::SystemShellExecute::create(::comphelper::getProcessComponentContext() ) );
        xSystemShellExecute->execute( sURL, OUString(), com::sun::star::system::SystemShellExecuteFlags::URIS_ONLY );
    }
    catch (const Exception&)
    {
        Any exc( ::cppu::getCaughtException() );
        OUString msg( ::comphelper::anyToString( exc ) );
        const SolarMutexGuard guard;
        MessageDialog aErrorBox(NULL, msg);
        aErrorBox.SetText( GetText() );
        aErrorBox.Execute();
    }

    return 1;
}

void AboutDialog::StyleControls()
{
    // Make all the controls have a transparent background
    m_pLogoImage->SetBackground();
    m_pLogoReplacement->SetPaintTransparent(true);
    m_pVersion->SetPaintTransparent(true);
    m_pDescriptionText->SetPaintTransparent(true);
    m_pCopyrightText->SetPaintTransparent(true);

    vcl::Font aLabelFont = GetSettings().GetStyleSettings().GetLabelFont();
    vcl::Font aLargeFont = aLabelFont;
    aLargeFont.SetSize( Size( 0, aLabelFont.GetSize().Height() * 3 ) );

    // Logo Replacement Text
    m_pLogoReplacement->SetControlFont( aLargeFont );

    // Description Text
    aLargeFont.SetSize( Size( 0, aLabelFont.GetSize().Height() * 1.3 ) );
    m_pDescriptionText->SetControlFont(aLargeFont);

    // Version Text
    aLargeFont.SetSize( Size( 0, aLabelFont.GetSize().Height() * 1.2 ) );
    m_pVersion->SetControlFont(aLargeFont);

    // If not in high-contrast mode, hard-code colors
    if ( !(Application::GetSettings().GetStyleSettings().GetHighContrastMode()) )
    {
        m_pLogoReplacement->SetControlForeground(Color(51, 51, 51));
        m_pVersion->SetControlForeground(Color(102, 102, 102));
        m_pDescriptionText->SetControlForeground(Color(51, 51, 51));
        m_pCopyrightText->SetControlForeground(Color(102, 102, 102));
    }
}

void AboutDialog::SetLogo()
{
    long nWidth = get_content_area()->get_preferred_size().Width();

    // fdo#67401 set AntiAliasing for SVG logo
    SvtOptionsDrawinglayer aDrawOpt;
    bool bOldAntiAliasSetting = aDrawOpt.IsAntiAliasing();
    aDrawOpt.SetAntiAliasing(true);

    // load svg logo, specify desired width, scale height isotrophically
    if( SfxApplication::loadBrandSvg("flat_logo", aLogoBitmap, nWidth) &&
        !aLogoBitmap.IsEmpty() )
    {
        m_pLogoImage->SetImage(Image(aLogoBitmap));
        m_pLogoReplacement->Hide();
        m_pLogoImage->Show();
    }
    else
    {
        m_pLogoImage->Hide();
        m_pLogoReplacement->Show();
    }
    aDrawOpt.SetAntiAliasing(bOldAntiAliasSetting);
}

void AboutDialog::Resize()
{
    SfxModalDialog::Resize();
    // Load background image
    if (isInitialLayout(this) && !(Application::GetSettings().GetStyleSettings().GetHighContrastMode()))
    {
        SfxApplication::loadBrandSvg("shell/about", aBackgroundBitmap, GetOutputSizePixel().Width());
    }
}

void AboutDialog::Paint( const Rectangle& rRect )
{
    SetClipRegion(vcl::Region(rRect));

    Size aSize(GetOutputSizePixel());
    Point aPos(aSize.Width() - aBackgroundBitmap.GetSizePixel().Width(),
                aSize.Height() - aBackgroundBitmap.GetSizePixel().Height());
    DrawBitmapEx(aPos, aBackgroundBitmap);
}

OUString AboutDialog::GetBuildId()
{
    OUString sDefault;
    OUString sBuildId(utl::Bootstrap::getBuildVersion(sDefault));
    if (!sBuildId.isEmpty())
        return sBuildId;

    sBuildId = utl::Bootstrap::getBuildIdData(sDefault);

    if (!sBuildId.isEmpty())
    {
        sal_Int32 nIndex = 0;
        return sBuildId.getToken( 0, '-', nIndex );
    }

    OSL_ENSURE( !sBuildId.isEmpty(), "No BUILDID in bootstrap file" );
    return sBuildId;
}

OUString AboutDialog::GetLocaleString()
{
    OUString pLocaleStr;
    rtl_Locale * pLocale;

    osl_getProcessLocale( &pLocale );

    if ( pLocale && pLocale->Language && pLocale->Country )
    {
        pLocaleStr = OUString(pLocale->Language) + "_" + OUString(pLocale->Country);
    }

    return pLocaleStr;
}

OUString AboutDialog::GetVersionString()
{
    OUString sVersion = m_aVersionTextStr;

    OUString sBuildId = GetBuildId();

    OUString pLocaleStr = GetLocaleString();

    if (!sBuildId.trim().isEmpty())
    {
        sVersion += "\n";
        if (m_sBuildStr.indexOf("$BUILDID") == -1)
        {
            SAL_WARN( "cui.dialogs", "translated Build Id string in translations doesn't contain $BUILDID placeholder" );
            m_sBuildStr += " $BUILDID";
        }
        sVersion += m_sBuildStr.replaceAll("$BUILDID", sBuildId);
    }

    if (strlen(EXTRA_BUILDID) > 0)
    {
        sVersion += "\n";
        sVersion += EXTRA_BUILDID;
    }

    if (!pLocaleStr.trim().isEmpty())
    {
        sVersion += "\n";
        if (m_pLocaleStr.indexOf("$LOCALE") == -1)
        {
            SAL_WARN( "cui.dialogs", "translated locale string in translations doesn't contain $LOCALE placeholder" );
            m_pLocaleStr += " $LOCALE";
        }
        sVersion += m_pLocaleStr.replaceAll("$LOCALE", pLocaleStr);
    }

    return sVersion;
}

OUString AboutDialog::GetCopyrightString()
{
    OUString aCopyrightString = m_aVendorTextStr;
    aCopyrightString += "\n";

    aCopyrightString += m_aCopyrightTextStr;
    aCopyrightString += "\n";

    if (utl::ConfigManager::getProductName().equals("LibreOffice"))
        aCopyrightString += m_aBasedTextStr;
    else
        aCopyrightString += m_aBasedDerivedTextStr;

    return aCopyrightString;
}

bool AboutDialog::Close()
{
    EndDialog( RET_OK );
    return false;
}

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