/* -*- 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/filter/PngImageWriter.hxx>

#include <vcl/toolkit/treelistentry.hxx>

#include <vcl/toolkit/viewdataentry.hxx>

#include <iconview.hxx>

#include "iconviewimpl.hxx"

#include <vcl/uitest/uiobject.hxx>

#include <tools/json_writer.hxx>

#include <vcl/toolkit/svlbitm.hxx>

#include <tools/stream.hxx>

#include <vcl/cvtgrf.hxx>

#include <comphelper/base64.hxx>

#include <comphelper/propertyvalue.hxx>

namespace

{

const int separatorHeight = 10;

const int nSpacing = 5; // 5 pixels from top, from bottom, between icon and label

}

IconView::IconView(vcl::Window* pParent, WinBits nBits)

    : SvTreeListBox(pParent, nBits)

{

    m_nColumnCount = 1;

    mbCenterAndClipText = true;

    SetEntryWidth(100);

    pImpl.reset(new IconViewImpl(this, GetModel(), GetStyle()));

}

Unexecuted instantiation: IconView::IconView(vcl::Window*, long)

Unexecuted instantiation: IconView::IconView(vcl::Window*, long)

Size IconView::GetEntrySize(const SvTreeListEntry& entry) const

{

    if (entry.IsSeparator())

        return { GetEntryWidth() * GetColumnCount(), separatorHeight };

    return { GetEntryWidth(), GetEntryHeight() };

}

void IconView::SetFixedColumnCount(short nColumnCount)

{

    m_nFixedColumnCount = nColumnCount;

    m_nColumnCount = nColumnCount;

}

void IconView::UpdateEntrySize(const Image& pImage)

{

    int spacing = nSpacing * 2;

    SetEntryHeight(pImage.GetSizePixel().getHeight() + spacing);

    SetEntryWidth(pImage.GetSizePixel().getWidth() + spacing);

}

bool IconView::HasSeparatorEntry() const

{

    for (sal_uInt32 i = 0; i < GetEntryCount(); i++)

    {

        SvTreeListEntry* pEntry = GetEntry(i);

        if (pEntry && pEntry->IsSeparator())

            return true;

    }

    return false;

}

void IconView::CalcEntryHeight(SvTreeListEntry const* pEntry)

{

    int nHeight = nSpacing * 2;

    SvViewDataEntry* pViewData = GetViewDataEntry(pEntry);

    const size_t nCount = pEntry->ItemCount();

    bool bHasIcon = false;

    for (size_t nCur = 0; nCur < nCount; ++nCur)

    {

        nHeight += SvLBoxItem::GetHeight(pViewData, nCur);

        if (!bHasIcon && pEntry->GetItem(nCur).GetType() == SvLBoxItemType::ContextBmp)

            bHasIcon = true;

    }

    if (bHasIcon && nCount > 1)

        nHeight += nSpacing; // between icon and label

    if (nHeight > nEntryHeight)

    {

        nEntryHeight = nHeight;

        Control::SetFont(GetFont());

        pImpl->SetEntryHeight();

    }

}

void IconView::Resize()

{

    Size aBoxSize = Control::GetOutputSizePixel();

    if (!aBoxSize.Width())

        return;

    if (m_nFixedColumnCount == -1)

        m_nColumnCount = nEntryWidth ? aBoxSize.Width() / nEntryWidth : 1;

    SvTreeListBox::Resize();

}

Size IconView::GetOptimalSize() const

{

    if (m_nFixedColumnCount != -1 && !HasSeparatorEntry())

    {

        // if a fixed amount of columns has been set and only icons (no separators) are used,

        // calculate size needed for those

        const short nRowCount = std::ceil(double(GetEntryCount()) / GetColumnCount());

        Size aSize(GetColumnCount() * nEntryWidth, nRowCount * nEntryHeight);

        if (GetStyle() & WB_VSCROLL)

            aSize.AdjustWidth(GetSettings().GetStyleSettings().GetScrollBarSize());

        return aSize;

    }

    return SvTreeListBox::GetOptimalSize();

}

tools::Rectangle IconView::GetFocusRect(const SvTreeListEntry* pEntry, tools::Long)

{

    return { GetEntryPosition(pEntry), GetEntrySize(*pEntry) };

}

void IconView::PaintEntry(SvTreeListEntry& rEntry, tools::Long nX, tools::Long nY,

                          vcl::RenderContext& rRenderContext)

{

    pImpl->UpdateContextBmpWidthMax(&rEntry);

    const Size entrySize = GetEntrySize(rEntry);

    short nTempEntryHeight = entrySize.Height();

    short nTempEntryWidth = entrySize.Width();

    Point aEntryPos(nX, nY);

    auto popIt = rRenderContext.ScopedPush(vcl::PushFlags::FILLCOLOR | vcl::PushFlags::LINECOLOR

                                           | vcl::PushFlags::FONT);

    const Color aBackupColor = rRenderContext.GetFillColor();

    const StyleSettings& rSettings = rRenderContext.GetSettings().GetStyleSettings();

    const Size aOutputSize = GetOutputSizePixel();

    if (aOutputSize.getHeight() < nTempEntryHeight)

        nTempEntryHeight = aOutputSize.getHeight();

    const SvViewDataEntry* pViewDataEntry = GetViewDataEntry(&rEntry);

    if (pViewDataEntry->IsHighlighted())

    {

        vcl::Font aHighlightFont(rRenderContext.GetFont());

        const Color aHighlightTextColor(rSettings.GetHighlightTextColor());

        aHighlightFont.SetColor(aHighlightTextColor);

        // set font color to highlight

        rRenderContext.SetTextColor(aHighlightTextColor);

        rRenderContext.SetFont(aHighlightFont);

    }

    bool bFillColorSet = false;

    // draw background

    if (!(nTreeFlags & SvTreeFlags::USESEL))

    {

        // set background pattern/color

        Wallpaper aWallpaper = rRenderContext.GetBackground();

        if (pViewDataEntry->IsHighlighted())

        {

            Color aNewWallColor = rSettings.GetHighlightColor();

            // if the face color is bright then the deactivate color is also bright

            // -> so you can't see any deactivate selection

            const WinBits nWindowStyle = GetStyle();

            const bool bHideSelection = (nWindowStyle & WB_HIDESELECTION) != 0 && !HasFocus();

            if (bHideSelection && !rSettings.GetFaceColor().IsBright()

                && aWallpaper.GetColor().IsBright() != rSettings.GetDeactiveColor().IsBright())

            {

                aNewWallColor = rSettings.GetDeactiveColor();

            }

            aWallpaper.SetColor(aNewWallColor);

        }

        Color aBackgroundColor = aWallpaper.GetColor();

        if (aBackgroundColor != COL_TRANSPARENT)

        {

            rRenderContext.SetFillColor(aBackgroundColor);

            bFillColorSet = true;

            // this case may occur for smaller horizontal resizes

            if (nTempEntryWidth > 1)

                rRenderContext.DrawRect({ aEntryPos, Size(nTempEntryWidth, nTempEntryHeight) });

        }

    }

    const size_t nItemCount = rEntry.ItemCount();

    size_t nIconItem = nItemCount;

    int nLabelHeight = 0;

    std::vector<size_t> aTextItems;

    for (size_t nCurItem = 0; nCurItem < nItemCount; ++nCurItem)

    {

        SvLBoxItem& rItem = rEntry.GetItem(nCurItem);

        SvLBoxItemType nItemType = rItem.GetType();

        if (nItemType == SvLBoxItemType::ContextBmp)

        {

            nIconItem = nCurItem;

            continue;

        }

        aTextItems.push_back(nCurItem);

        auto nItemHeight = SvLBoxItem::GetHeight(pViewDataEntry, nCurItem);

        nLabelHeight += nItemHeight;

    }

    int nLabelYPos = nY + nTempEntryHeight - nLabelHeight - nSpacing; // padding from bottom

    for (auto nCurItem : aTextItems)

    {

        aEntryPos.setY(nLabelYPos);

        auto nItemHeight = SvLBoxItem::GetHeight(pViewDataEntry, nCurItem);

        nLabelYPos += nItemHeight;

        rEntry.GetItem(nCurItem).Paint(aEntryPos, *this, rRenderContext, pViewDataEntry, rEntry);

    }

    if (bFillColorSet)

        rRenderContext.SetFillColor(aBackupColor);

    // draw icon

    if (nIconItem < nItemCount)

    {

        SvLBoxItem& rItem = rEntry.GetItem(nIconItem);

        auto nItemWidth = rItem.GetWidth(this, pViewDataEntry, nIconItem);

        auto nItemHeight = SvLBoxItem::GetHeight(pViewDataEntry, nIconItem);

        aEntryPos.setY(nY);

        // center horizontally

        aEntryPos.AdjustX((nTempEntryWidth - nItemWidth) / 2);

        // center vertically

        int nImageAreaHeight = nTempEntryHeight - nSpacing * 2; // spacings from top, from bottom

        if (nLabelHeight > 0)

        {

            nImageAreaHeight -= nLabelHeight + nSpacing; // spacing between icon and label

        }

        aEntryPos.AdjustY((nImageAreaHeight - nItemHeight) / 2 + nSpacing);

        rItem.Paint(aEntryPos, *this, rRenderContext, pViewDataEntry, rEntry);

    }

}

FactoryFunction IconView::GetUITestFactory() const { return IconViewUIObject::create; }

static OString extractPngString(const SvLBoxContextBmp* pBmpItem)

{

    Bitmap aImage = pBmpItem->GetBitmap1().GetBitmap();

    SvMemoryStream aOStm(65535, 65535);

    // Use fastest compression "1"

    css::uno::Sequence<css::beans::PropertyValue> aFilterData{

        comphelper::makePropertyValue(u"Compression"_ustr, sal_Int32(1)),

    };

    vcl::PngImageWriter aPNGWriter(aOStm);

    aPNGWriter.setParameters(aFilterData);

    if (aPNGWriter.write(aImage))

    {

        css::uno::Sequence<sal_Int8> aSeq(static_cast<sal_Int8 const*>(aOStm.GetData()),

                                          aOStm.Tell());

        OStringBuffer aBuffer("data:image/png;base64,");

        ::comphelper::Base64::encode(aBuffer, aSeq);

        return aBuffer.makeStringAndClear();

    }

    return ""_ostr;

}

OUString IconView::renderEntry(int pos, int /*dpix*/, int /*dpiy*/) const

{

    // TODO: support various DPI

    SvTreeListEntry* pEntry = GetEntry(pos);

    if (!pEntry)

        return "";

    OUString sResult;

    const bool bHandled

        = maDumpImageHdl.IsSet() && maDumpImageHdl.Call(encoded_image_query(sResult, pEntry));

    if (!bHandled)

    {

        if (const SvLBoxItem* pIt = pEntry->GetFirstItem(SvLBoxItemType::ContextBmp))

        {

            const SvLBoxContextBmp* pBmpItem = static_cast<const SvLBoxContextBmp*>(pIt);

            if (pBmpItem)

                return OStringToOUString(extractPngString(pBmpItem), RTL_TEXTENCODING_ASCII_US);

        }

    }

    return sResult;

}

void IconView::DumpEntryAndSiblings(tools::JsonWriter& rJsonWriter, SvTreeListEntry* pEntry)

{

    while (pEntry)

    {

        auto aNode = rJsonWriter.startStruct();

        // simple listbox value

        const SvLBoxItem* pIt = pEntry->GetFirstItem(SvLBoxItemType::String);

        if (pIt)

            rJsonWriter.put("text", static_cast<const SvLBoxString*>(pIt)->GetText());

        pIt = pEntry->GetFirstItem(SvLBoxItemType::ContextBmp);

        if (pIt)

        {

            const SvLBoxContextBmp* pBmpItem = static_cast<const SvLBoxContextBmp*>(pIt);

            if (pBmpItem)

                rJsonWriter.put("ondemand", true);

        }

        if (const OUString tooltip = GetEntryTooltip(pEntry); !tooltip.isEmpty())

            rJsonWriter.put("tooltip", tooltip);

        if (IsSelected(pEntry))

            rJsonWriter.put("selected", true);

        if (pEntry->IsSeparator())

            rJsonWriter.put("separator", true);

        rJsonWriter.put("row", GetModel()->GetAbsPos(pEntry));

        pEntry = pEntry->NextSibling();

    }

}

void IconView::DumpAsPropertyTree(tools::JsonWriter& rJsonWriter)

{

    SvTreeListBox::DumpAsPropertyTree(rJsonWriter);

    rJsonWriter.put("type", "iconview");

    rJsonWriter.put("singleclickactivate", GetActivateOnSingleClick());

    rJsonWriter.put("textWithIconEnabled", IsTextColumnEnabled());

    auto aNode = rJsonWriter.startArray("entries");

    DumpEntryAndSiblings(rJsonWriter, First());

}

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