Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 226 insertions, 0 deletions

diff --git a/vcl/inc/sallayout.hxx b/vcl/inc/sallayout.hxx
new file mode 100644
index 000000000..e94b4c205
--- /dev/null
+++ b/vcl/inc/sallayout.hxx
@@ -0,0 +1,226 @@
+/* -*- 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 .
+ */
+
+#ifndef INCLUDED_VCL_INC_SALLAYOUT_HXX
+#define INCLUDED_VCL_INC_SALLAYOUT_HXX
+
+#include <iostream>
+#include <memory>
+#include <vector>
+
+#include <hb.h>
+
+#include <com/sun/star/i18n/XBreakIterator.hpp>
+
+#include <basegfx/polygon/b2dpolypolygon.hxx>
+#include <i18nlangtag/languagetag.hxx>
+#include <tools/gen.hxx>
+#include <vcl/dllapi.h>
+#include <vcl/vclenum.hxx> // for typedef sal_UCS4
+#include <vcl/devicecoordinate.hxx>
+#include <vcl/vcllayout.hxx>
+
+#include "impglyphitem.hxx"
+
+#define MAX_FALLBACK 16
+
+
+class SalGraphics;
+class PhysicalFontFace;
+class GenericSalLayout;
+enum class SalLayoutFlags;
+namespace vcl {
+    class TextLayoutCache;
+}
+
+// used for managing runs e.g. for BiDi, glyph and script fallback
+class ImplLayoutRuns
+{
+private:
+    int                 mnRunIndex;
+    std::vector<int>    maRuns;
+
+public:
+            ImplLayoutRuns() { mnRunIndex = 0; maRuns.reserve(8); }
+
+    void    Clear()             { maRuns.clear(); }
+    void    AddPos( int nCharPos, bool bRTL );
+    void    AddRun( int nMinRunPos, int nEndRunPos, bool bRTL );
+
+    bool    IsEmpty() const     { return maRuns.empty(); }
+    void    ResetPos()          { mnRunIndex = 0; }
+    void    NextRun()           { mnRunIndex += 2; }
+    bool    GetRun( int* nMinRunPos, int* nEndRunPos, bool* bRTL ) const;
+    bool    GetNextPos( int* nCharPos, bool* bRTL );
+    bool    PosIsInRun( int nCharPos ) const;
+    bool    PosIsInAnyRun( int nCharPos ) const;
+};
+
+class VCL_DLLPUBLIC ImplLayoutArgs
+{
+public:
+    // string related inputs
+    LanguageTag         maLanguageTag;
+    SalLayoutFlags      mnFlags;
+    const OUString&     mrStr;
+    int                 mnMinCharPos;
+    int                 mnEndCharPos;
+
+    // performance hack
+    vcl::TextLayoutCache const* m_pTextLayoutCache;
+
+    // positioning related inputs
+    const DeviceCoordinate* mpDXArray;     // in pixel units
+    DeviceCoordinate    mnLayoutWidth;      // in pixel units
+    int                 mnOrientation;      // in 0-3600 system
+
+    // data for bidi and glyph+script fallback
+    ImplLayoutRuns      maRuns;
+    ImplLayoutRuns      maFallbackRuns;
+
+                ImplLayoutArgs( const OUString& rStr,
+                                int nMinCharPos, int nEndCharPos, SalLayoutFlags nFlags,
+                                const LanguageTag& rLanguageTag,
+                                vcl::TextLayoutCache const* pLayoutCache);
+
+    void        SetLayoutWidth( DeviceCoordinate nWidth )       { mnLayoutWidth = nWidth; }
+    void        SetDXArray( const DeviceCoordinate* pDXArray )  { mpDXArray = pDXArray; }
+    void        SetOrientation( int nOrientation )  { mnOrientation = nOrientation; }
+
+    void        ResetPos()
+                    { maRuns.ResetPos(); }
+    bool        GetNextPos( int* nCharPos, bool* bRTL )
+                    { return maRuns.GetNextPos( nCharPos, bRTL ); }
+    bool        GetNextRun( int* nMinRunPos, int* nEndRunPos, bool* bRTL );
+    void        NeedFallback( int nMinRunPos, int nEndRunPos, bool bRTL )
+                    { maFallbackRuns.AddRun( nMinRunPos, nEndRunPos, bRTL ); }
+    // methods used by BiDi and glyph fallback
+    bool        NeedFallback() const
+                    { return !maFallbackRuns.IsEmpty(); }
+    bool        PrepareFallback();
+
+private:
+    void        AddRun( int nMinCharPos, int nEndCharPos, bool bRTL );
+};
+
+// For nice SAL_INFO logging of ImplLayoutArgs values
+std::ostream &operator <<(std::ostream& s, ImplLayoutArgs const &rArgs);
+
+class MultiSalLayout final : public SalLayout
+{
+public:
+    void            DrawText(SalGraphics&) const override;
+    sal_Int32       GetTextBreak(DeviceCoordinate nMaxWidth, DeviceCoordinate nCharExtra, int nFactor) const override;
+    DeviceCoordinate FillDXArray(DeviceCoordinate* pDXArray) const override;
+    void            GetCaretPositions(int nArraySize, long* pCaretXArray) const override;
+    bool            GetNextGlyph(const GlyphItem** pGlyph, Point& rPos, int& nStart,
+                                 const PhysicalFontFace** pFallbackFont = nullptr,
+                                 int* const pFallbackLevel = nullptr) const override;
+    bool            GetOutline(basegfx::B2DPolyPolygonVector&) const override;
+    bool            IsKashidaPosValid(int nCharPos) const override;
+
+    // used only by OutputDevice::ImplLayout, TODO: make friend
+    explicit        MultiSalLayout( std::unique_ptr<SalLayout> pBaseLayout );
+    void            AddFallback(std::unique_ptr<SalLayout> pFallbackLayout, ImplLayoutRuns const &);
+    bool            LayoutText(ImplLayoutArgs&, const SalLayoutGlyphs*) override;
+    void            AdjustLayout(ImplLayoutArgs&) override;
+    void            InitFont() const override;
+
+    void SetIncomplete(bool bIncomplete);
+
+public:
+    virtual         ~MultiSalLayout() override;
+
+private:
+                    MultiSalLayout( const MultiSalLayout& ) = delete;
+                    MultiSalLayout& operator=( const MultiSalLayout& ) = delete;
+
+    std::unique_ptr<GenericSalLayout> mpLayouts[ MAX_FALLBACK ];
+    ImplLayoutRuns  maFallbackRuns[ MAX_FALLBACK ];
+    int             mnLevel;
+    bool            mbIncomplete;
+};
+
+class VCL_DLLPUBLIC GenericSalLayout : public SalLayout
+{
+    friend void MultiSalLayout::AdjustLayout(ImplLayoutArgs&);
+
+public:
+                    GenericSalLayout(LogicalFontInstance&);
+                    ~GenericSalLayout() override;
+
+    void            AdjustLayout(ImplLayoutArgs&) final override;
+    bool            LayoutText(ImplLayoutArgs&, const SalLayoutGlyphs*) final override;
+    void            DrawText(SalGraphics&) const final override;
+    static std::shared_ptr<vcl::TextLayoutCache> CreateTextLayoutCache(OUString const&);
+    const SalLayoutGlyphs* GetGlyphs() const final override;
+
+    bool            IsKashidaPosValid(int nCharPos) const final override;
+
+    // used by upper layers
+    DeviceCoordinate GetTextWidth() const final override;
+    DeviceCoordinate FillDXArray(DeviceCoordinate* pDXArray) const final override;
+    sal_Int32 GetTextBreak(DeviceCoordinate nMaxWidth, DeviceCoordinate nCharExtra, int nFactor) const final override;
+    void            GetCaretPositions(int nArraySize, long* pCaretXArray) const final override;
+
+    // used by display layers
+    LogicalFontInstance& GetFont() const
+        { return m_GlyphItems.Impl()->GetFont(); }
+
+    bool            GetNextGlyph(const GlyphItem** pGlyph, Point& rPos, int& nStart,
+                                 const PhysicalFontFace** pFallbackFont = nullptr,
+                                 int* const pFallbackLevel = nullptr) const override;
+
+private:
+    // for glyph+font+script fallback
+    void            MoveGlyph(int nStart, long nNewXPos);
+    void            DropGlyph(int nStart);
+    void            Simplify(bool bIsBase);
+
+                    GenericSalLayout( const GenericSalLayout& ) = delete;
+                    GenericSalLayout& operator=( const GenericSalLayout& ) = delete;
+
+    void            ApplyDXArray(const ImplLayoutArgs&);
+    void            Justify(DeviceCoordinate nNewWidth);
+    void            ApplyAsianKerning(const OUString& rStr);
+
+    void            GetCharWidths(DeviceCoordinate* pCharWidths) const;
+
+    void            SetNeedFallback(ImplLayoutArgs&, sal_Int32, bool);
+
+    bool            HasVerticalAlternate(sal_UCS4 aChar, sal_UCS4 aNextChar);
+
+    void            ParseFeatures(const OUString& name);
+
+    css::uno::Reference<css::i18n::XBreakIterator> mxBreak;
+
+    SalLayoutGlyphs m_GlyphItems;
+
+    OString         msLanguage;
+    std::vector<hb_feature_t> maFeatures;
+
+    hb_set_t*       mpVertGlyphs;
+    const bool      mbFuzzing;
+};
+
+#undef SalGraphics
+
+#endif // INCLUDED_VCL_INC_SALLAYOUT_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */