libreoffice/vcl/qt5/Qt5Graphics_Text.cxx

/* -*- 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 "Qt5Graphics.hxx"
#include "Qt5FontFace.hxx"
#include "Qt5Font.hxx"
#include "Qt5Painter.hxx"

#include <vcl/fontcharmap.hxx>

#include <sallayout.hxx>
#include <PhysicalFontCollection.hxx>

#include <QtGui/QGlyphRun>
#include <QtGui/QFontDatabase>
#include <QtGui/QRawFont>
#include <QtCore/QStringList>

void Qt5Graphics::SetTextColor(Color nColor) { m_aTextColor = nColor; }

void Qt5Graphics::SetFont(const FontSelectPattern* pReqFont, int nFallbackLevel)
{
    // release the text styles
    for (int i = nFallbackLevel; i < MAX_FALLBACK; ++i)
    {
        if (!m_pTextStyle[i])
            break;
        m_pTextStyle[i]->Release();
        m_pTextStyle[i] = nullptr;
    }

    if (!pReqFont)
        return;
    assert(pReqFont->mpFontInstance);
    if (!pReqFont->mpFontInstance)
        return;

    m_pTextStyle[nFallbackLevel] = static_cast<Qt5Font*>(pReqFont->mpFontInstance);
    m_pTextStyle[nFallbackLevel]->Acquire();
}

void Qt5Graphics::GetFontMetric(ImplFontMetricDataRef& rFMD, int nFallbackLevel)
{
    QRawFont aRawFont(QRawFont::fromFont(*m_pTextStyle[nFallbackLevel]));

    QByteArray aHheaTable = aRawFont.fontTable("hhea");
    std::vector<uint8_t> rHhea(aHheaTable.data(), aHheaTable.data() + aHheaTable.size());

    QByteArray aOs2Table = aRawFont.fontTable("OS/2");
    std::vector<uint8_t> rOS2(aOs2Table.data(), aOs2Table.data() + aOs2Table.size());

    rFMD->ImplCalcLineSpacing(rHhea, rOS2, aRawFont.unitsPerEm());

    rFMD->SetWidth(aRawFont.averageCharWidth());

    rFMD->SetMinKashida(m_pTextStyle[nFallbackLevel]->GetKashidaWidth());
}

const FontCharMapRef Qt5Graphics::GetFontCharMap() const
{
    if (!m_pTextStyle[0])
        return FontCharMapRef(new FontCharMap());
    return static_cast<const Qt5FontFace*>(m_pTextStyle[0]->GetFontFace())->GetFontCharMap();
}

bool Qt5Graphics::GetFontCapabilities(vcl::FontCapabilities& rFontCapabilities) const
{
    if (!m_pTextStyle[0])
        return false;
    return static_cast<const Qt5FontFace*>(m_pTextStyle[0]->GetFontFace())
        ->GetFontCapabilities(rFontCapabilities);
}

void Qt5Graphics::GetDevFontList(PhysicalFontCollection* pPFC)
{
    m_pFontCollection = pPFC;
    if (pPFC->Count())
        return;

    QFontDatabase aFDB;
    for (auto& family : aFDB.families())
        for (auto& style : aFDB.styles(family))
        {
            // Just get any size - we don't care
            QList<int> sizes = aFDB.smoothSizes(family, style);
            pPFC->Add(Qt5FontFace::fromQFont(aFDB.font(family, style, *sizes.begin())));
        }
}

void Qt5Graphics::ClearDevFontCache() {}

bool Qt5Graphics::AddTempDevFont(PhysicalFontCollection*, const OUString& /*rFileURL*/,
                                 const OUString& /*rFontName*/)
{
    return false;
}

bool Qt5Graphics::CreateFontSubset(const OUString& /*rToFile*/, const PhysicalFontFace* /*pFont*/,
                                   const sal_GlyphId* /*pGlyphIds*/, const sal_uInt8* /*pEncoding*/,
                                   sal_Int32* /*pWidths*/, int /*nGlyphs*/,
                                   FontSubsetInfo& /*rInfo*/)
{
    return false;
}

const void* Qt5Graphics::GetEmbedFontData(const PhysicalFontFace*, long* /*pDataLen*/)
{
    return nullptr;
}

void Qt5Graphics::FreeEmbedFontData(const void* /*pData*/, long /*nDataLen*/) {}

void Qt5Graphics::GetGlyphWidths(const PhysicalFontFace* /*pPFF*/, bool /*bVertical*/,
                                 std::vector<sal_Int32>& /*rWidths*/, Ucs2UIntMap& /*rUnicodeEnc*/)
{
}

bool Qt5Graphics::GetGlyphBoundRect(const GlyphItem& rGlyph, tools::Rectangle& rRect)
{
    const int nLevel = rGlyph.mnFallbackLevel;
    if( nLevel >= MAX_FALLBACK )
        return false;

    Qt5Font* pFont = m_pTextStyle[ nLevel ];
    if( !pFont )
        return false;

    QRawFont aRawFont(QRawFont::fromFont( *pFont ));
    rRect = toRectangle(aRawFont.boundingRect(rGlyph.maGlyphId).toAlignedRect());
    return true;
}

bool Qt5Graphics::GetGlyphOutline(const GlyphItem&, basegfx::B2DPolyPolygon&) { return false; }

std::unique_ptr<SalLayout> Qt5Graphics::GetTextLayout(ImplLayoutArgs&, int nFallbackLevel)
{
    if (m_pTextStyle[nFallbackLevel])
        return std::unique_ptr<SalLayout>(new GenericSalLayout(*m_pTextStyle[nFallbackLevel]));
    return std::unique_ptr<SalLayout>();
}

void Qt5Graphics::DrawTextLayout(const GenericSalLayout &rLayout )
{
    const Qt5Font* pFont = static_cast<const Qt5Font*>(&rLayout.GetFont());
    assert( pFont );
    QRawFont aRawFont(QRawFont::fromFont( *pFont ));

    QVector<quint32> glyphIndexes;
    QVector<QPointF> positions;

    Point aPos;
    const GlyphItem* pGlyph;
    int nStart = 0;
    while (rLayout.GetNextGlyph(&pGlyph, aPos, nStart))
    {
        glyphIndexes.push_back(pGlyph->maGlyphId);
        positions.push_back(QPointF(aPos.X(), aPos.Y()));
    }

    QGlyphRun aGlyphRun;
    aGlyphRun.setPositions( positions );
    aGlyphRun.setGlyphIndexes( glyphIndexes );
    aGlyphRun.setRawFont( aRawFont );

    Qt5Painter aPainter(*this);
    QColor aColor = toQColor(m_aTextColor);
    aPainter.setPen(aColor);
    aPainter.drawGlyphRun( QPointF(), aGlyphRun );
}

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