/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*

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 *

 * 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 <overlayobject.hxx>

#include <drawinglayer/attribute/fontattribute.hxx>

#include <drawinglayer/geometry/viewinformation2d.hxx>

#include <drawinglayer/primitive2d/PolygonHairlinePrimitive2D.hxx>

#include <drawinglayer/primitive2d/PolyPolygonColorPrimitive2D.hxx>

#include <drawinglayer/primitive2d/textlayoutdevice.hxx>

#include <drawinglayer/primitive2d/textprimitive2d.hxx>

#include <basegfx/polygon/b2dpolygontools.hxx>

#include <basegfx/matrix/b2dhommatrixtools.hxx>

#include <tools/lineend.hxx>

#include <utility>

#include <vcl/outdev.hxx>

#include <vcl/settings.hxx>

#include <vcl/metric.hxx>

#include <sal/log.hxx>

#define HINT_LINESPACE  2

#define HINT_INDENT     3

#define HINT_MARGIN     4

ScOverlayHint::ScOverlayHint(OUString aTit, const OUString& rMsg,

                             const Color& rBackColor, const Color& rTextColor,

                             vcl::Font aFont)

    : OverlayObject(rBackColor)

    , m_aTitle(std::move(aTit))

    , m_aMessage(convertLineEnd(rMsg, LINEEND_CR))

    , m_aTextFont(std::move(aFont))

    , m_aTextColor(rTextColor)

    , m_aMapMode(MapUnit::MapPixel)

    , m_nLeft(0)

    , m_nTop(0)

{

}

drawinglayer::primitive2d::Primitive2DContainer ScOverlayHint::createOverlaySequence(sal_Int32 nLeft, sal_Int32 nTop,

                                                                                     const MapMode &rMapMode,

                                                                                     basegfx::B2DRange &rRange) const

{

    OutputDevice* pDefaultDev = Application::GetDefaultDevice();

    MapMode aOld = pDefaultDev->GetMapMode();

    pDefaultDev->SetMapMode(rMapMode);

    vcl::Font aTextFont = m_aTextFont;

    aTextFont.SetFontSize(pDefaultDev->PixelToLogic(aTextFont.GetFontSize(), rMapMode));

    vcl::Font aHeadFont = aTextFont;

    aHeadFont.SetWeight(WEIGHT_BOLD);

    // Create the text primitive for the title

    basegfx::B2DVector aFontSize;

    drawinglayer::attribute::FontAttribute aFontAttr =

        drawinglayer::primitive2d::getFontAttributeFromVclFont(aFontSize, aHeadFont, false, false);

    FontMetric aFontMetric = pDefaultDev->GetFontMetric(aHeadFont);

    Size aHintMargin = pDefaultDev->PixelToLogic(Size(HINT_MARGIN, HINT_MARGIN), rMapMode);

    Size aIndent = pDefaultDev->PixelToLogic(Size(HINT_INDENT, HINT_LINESPACE), rMapMode);

    double nTextOffsetY = nTop + aHintMargin.Height() + aFontMetric.GetAscent();

    Point aTextPos(nLeft + aHintMargin.Width() , nTextOffsetY);

    rRange = basegfx::B2DRange(nLeft, nTop, nLeft + aHintMargin.Width(), nTop + aHintMargin.Height());

    basegfx::B2DHomMatrix aTextMatrix(basegfx::utils::createScaleTranslateB2DHomMatrix(

                                            aFontSize.getX(), aFontSize.getY(),

                                            aTextPos.X(), aTextPos.Y()));

    rtl::Reference<drawinglayer::primitive2d::TextSimplePortionPrimitive2D> pTitle =

        new drawinglayer::primitive2d::TextSimplePortionPrimitive2D(

                        aTextMatrix, m_aTitle, 0, m_aTitle.getLength(),

                        std::vector<double>(), {}, std::move(aFontAttr), css::lang::Locale(),

                        m_aTextColor.getBColor());

    Point aTextStart(nLeft + aHintMargin.Width() + aIndent.Width(),

                     nTop + aHintMargin.Height() + aFontMetric.GetLineHeight() + aIndent.Height());

    drawinglayer::geometry::ViewInformation2D aDummy;

    rRange.expand(pTitle->getB2DRange(aDummy));

    // insert two empty elements as placeholders for bg and border

    drawinglayer::primitive2d::Primitive2DContainer aSeq { nullptr, nullptr, pTitle };

    aFontMetric = pDefaultDev->GetFontMetric(aTextFont);

    pDefaultDev->SetMapMode(aOld);

    nTextOffsetY = aFontMetric.GetAscent();

    sal_Int32 nLineHeight = aFontMetric.GetLineHeight();

    aFontAttr = drawinglayer::primitive2d::getFontAttributeFromVclFont(aFontSize, aTextFont, false, false);

    sal_Int32 nIndex = 0;

    Point aLineStart = aTextStart;

    sal_Int32 nLineCount = 0;

    while (nIndex != -1)

    {

        OUString aLine = m_aMessage.getToken( 0, '\r', nIndex );

        if (aLine.getLength() > 255)

        {

            // prevent silliness higher up from hanging up the program

            SAL_WARN("sc", "ridiculously long line, truncating, len=" << aLine.getLength());

            aLine = aLine.copy(0,255);

        }

        aTextMatrix = basegfx::utils::createScaleTranslateB2DHomMatrix(

                                aFontSize.getX(), aFontSize.getY(),

                                aLineStart.X(), aLineStart.Y() + nTextOffsetY);

        // Create the text primitive for each line of text

        rtl::Reference<drawinglayer::primitive2d::TextSimplePortionPrimitive2D> pMessage =

                                        new drawinglayer::primitive2d::TextSimplePortionPrimitive2D(

                                                aTextMatrix, aLine, 0, aLine.getLength(),

                                                std::vector<double>(), {}, aFontAttr, css::lang::Locale(),

                                                m_aTextColor.getBColor());

        rRange.expand(pMessage->getB2DRange(aDummy));

        aSeq.push_back(pMessage);

        aLineStart.AdjustY(nLineHeight );

        nLineCount++;

        if (nLineCount > 50)

        {

            // prevent silliness higher up from hanging up the program

            SAL_WARN("sc", "ridiculously long message, bailing out");

            break;

        }

    }

    rRange.expand(basegfx::B2DTuple(rRange.getMaxX() + aHintMargin.Width(),

                                    rRange.getMaxY() + aHintMargin.Height()));

    basegfx::B2DPolygon aPoly(basegfx::utils::createPolygonFromRect(rRange));

    // background

    aSeq[0] = drawinglayer::primitive2d::Primitive2DReference(

        new drawinglayer::primitive2d::PolyPolygonColorPrimitive2D(basegfx::B2DPolyPolygon(aPoly), getBaseColor().getBColor()));

    // border

    aSeq[1] = drawinglayer::primitive2d::Primitive2DReference(

        new drawinglayer::primitive2d::PolygonHairlinePrimitive2D(

            std::move(aPoly), basegfx::BColor(0.5, 0.5, 0.5)));

    return aSeq;

}

drawinglayer::primitive2d::Primitive2DContainer ScOverlayHint::createOverlayObjectPrimitive2DSequence()

{

    basegfx::B2DRange aRange;

    return createOverlaySequence(m_nLeft, m_nTop, m_aMapMode, aRange);

}

Size ScOverlayHint::GetSizePixel() const

{

    basegfx::B2DRange aRange;

    createOverlaySequence(0, 0, MapMode(MapUnit::MapPixel), aRange);

    return Size(aRange.getWidth(), aRange.getHeight());

}

void ScOverlayHint::SetPos(const Point& rPos, const MapMode& rMode)

{

    m_nLeft = rPos.X();

    m_nTop = rPos.Y();

    m_aMapMode = rMode;

}

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