/* -*- 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 <sal/config.h>

#include <unotools/fontdefs.hxx>

#include <Qt5FontFace.hxx>
#include <Qt5Font.hxx>
#include <Qt5Tools.hxx>

#include <sft.hxx>
#include <fontinstance.hxx>
#include <fontselect.hxx>
#include <PhysicalFontCollection.hxx>

#include <QtGui/QFont>
#include <QtGui/QFontDatabase>
#include <QtGui/QFontInfo>
#include <QtGui/QRawFont>

using namespace vcl;

Qt5FontFace::Qt5FontFace(const Qt5FontFace& rSrc)
    : PhysicalFontFace(rSrc)
    , m_aFontId(rSrc.m_aFontId)
{
}

static FontWeight fromQFontWeight(int nWeight)
{
    FontWeight eWeight = WEIGHT_DONTKNOW;
    switch (nWeight)
    {
        case QFont::Thin:
            eWeight = WEIGHT_THIN;
            break;
        case QFont::ExtraLight:
            eWeight = WEIGHT_ULTRALIGHT;
            break;
        case QFont::Light:
            eWeight = WEIGHT_LIGHT;
            break;
        case QFont::Normal:
            eWeight = WEIGHT_NORMAL;
            break;
        case QFont::Medium:
            eWeight = WEIGHT_MEDIUM;
            break;
        case QFont::DemiBold:
            eWeight = WEIGHT_SEMIBOLD;
            break;
        case QFont::Bold:
            eWeight = WEIGHT_BOLD;
            break;
        case QFont::ExtraBold:
            eWeight = WEIGHT_ULTRABOLD;
            break;
        case QFont::Black:
            eWeight = WEIGHT_BLACK;
            break;
    }
    return eWeight;
}

void Qt5FontFace::fillAttributesFromQFont(const QFont& rFont, FontAttributes& rFA)
{
    QFontInfo aFontInfo(rFont);

    rFA.SetFamilyName(toOUString(aFontInfo.family()));
    if (IsStarSymbol(toOUString(aFontInfo.family())))
        rFA.SetSymbolFlag(true);
    rFA.SetStyleName(toOUString(aFontInfo.styleName()));
    rFA.SetPitch(aFontInfo.fixedPitch() ? PITCH_FIXED : PITCH_VARIABLE);
    rFA.SetWeight(fromQFontWeight(aFontInfo.weight()));

    switch (aFontInfo.style())
    {
        case QFont::StyleNormal:
            rFA.SetItalic(ITALIC_NONE);
            break;
        case QFont::StyleItalic:
            rFA.SetItalic(ITALIC_NORMAL);
            break;
        case QFont::StyleOblique:
            rFA.SetItalic(ITALIC_OBLIQUE);
            break;
    }
}

Qt5FontFace* Qt5FontFace::fromQFont(const QFont& rFont)
{
    FontAttributes aFA;
    fillAttributesFromQFont(rFont, aFA);
    return new Qt5FontFace(aFA, rFont.toString());
}

Qt5FontFace* Qt5FontFace::fromQFontDatabase(const QString& aFamily, const QString& aStyle)
{
    QFontDatabase aFDB;
    FontAttributes aFA;
    aFA.SetFamilyName(toOUString(aFamily));
    if (IsStarSymbol(aFA.GetFamilyName()))
        aFA.SetSymbolFlag(true);
    aFA.SetStyleName(toOUString(aStyle));
    aFA.SetPitch(aFDB.isFixedPitch(aFamily, aStyle) ? PITCH_FIXED : PITCH_VARIABLE);
    aFA.SetWeight(fromQFontWeight(aFDB.weight(aFamily, aStyle)));
    aFA.SetItalic(aFDB.italic(aFamily, aStyle) ? ITALIC_NORMAL : ITALIC_NONE);
    return new Qt5FontFace(aFA, aFamily + "," + aStyle);
}

Qt5FontFace::Qt5FontFace(const FontAttributes& rFA, const QString& rFontID)
    : PhysicalFontFace(rFA)
    , m_aFontId(rFontID)
    , m_bFontCapabilitiesRead(false)
{
}

sal_IntPtr Qt5FontFace::GetFontId() const { return reinterpret_cast<sal_IntPtr>(&m_aFontId); }

rtl::Reference<LogicalFontInstance>
Qt5FontFace::CreateFontInstance(const FontSelectPattern& rFSD) const
{
    return new Qt5Font(*this, rFSD);
}

bool Qt5FontFace::GetFontCapabilities(vcl::FontCapabilities& rFontCapabilities) const
{
    // read this only once per font
    if (m_bFontCapabilitiesRead)
    {
        rFontCapabilities = m_aFontCapabilities;
        return rFontCapabilities.oUnicodeRange || rFontCapabilities.oCodePageRange;
    }
    m_bFontCapabilitiesRead = true;

    QFont aFont;
    aFont.fromString(m_aFontId);
    QRawFont aRawFont(QRawFont::fromFont(aFont));
    QByteArray aOS2Table = aRawFont.fontTable("OS/2");
    if (!aOS2Table.isEmpty())
    {
        vcl::getTTCoverage(m_aFontCapabilities.oUnicodeRange, m_aFontCapabilities.oCodePageRange,
                           reinterpret_cast<const unsigned char*>(aOS2Table.data()),
                           aOS2Table.size());
    }

    rFontCapabilities = m_aFontCapabilities;
    return rFontCapabilities.oUnicodeRange || rFontCapabilities.oCodePageRange;
}

hb_blob_t* Qt5FontFace::GetHbTable(hb_tag_t nTag) const
{
    char pName[5];
    pName[0] = static_cast<char>(nTag >> 24);
    pName[1] = static_cast<char>(nTag >> 16);
    pName[2] = static_cast<char>(nTag >> 8);
    pName[3] = static_cast<char>(nTag);
    pName[4] = 0;

    QFont aFont;
    aFont.fromString(m_aFontId);
    QRawFont aRawFont(QRawFont::fromFont(aFont));
    QByteArray aTable = aRawFont.fontTable(pName);
    const sal_uInt32 nLength = aTable.size();

    hb_blob_t* pBlob = nullptr;
    if (nLength > 0)
        pBlob = hb_blob_create(aTable.data(), nLength, HB_MEMORY_MODE_DUPLICATE, nullptr, nullptr);
    return pBlob;
}

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