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Diffstat (limited to 'vcl/inc/sallayout.hxx')
| -rw-r--r-- | vcl/inc/sallayout.hxx | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/vcl/inc/sallayout.hxx b/vcl/inc/sallayout.hxx new file mode 100644 index 000000000..a1b30ed36 --- /dev/null +++ b/vcl/inc/sallayout.hxx @@ -0,0 +1,173 @@ +/* -*- 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 <sal/config.h> + +#include <basegfx/polygon/b2dpolypolygon.hxx> +#include <tools/gen.hxx> +#include <tools/degree.hxx> +#include <i18nlangtag/languagetag.hxx> + +#include <vcl/dllapi.h> +#include <vcl/devicecoordinate.hxx> +#include <vcl/vclenum.hxx> // for typedef sal_UCS4 +#include <vcl/vcllayout.hxx> + +#include "ImplLayoutRuns.hxx" +#include "impglyphitem.hxx" + +#include <com/sun/star/i18n/XBreakIterator.hpp> + +#include <hb.h> + +#include <iostream> +#include <memory> +#include <vector> + +#define MAX_FALLBACK 16 + +class GenericSalLayout; +class SalGraphics; +enum class SalLayoutFlags; + +namespace vcl::font { + class PhysicalFontFace; +} + +namespace vcl::text { + class TextLayoutCache; +} + +class MultiSalLayout final : public SalLayout +{ +public: + void DrawText(SalGraphics&) const override; + sal_Int32 GetTextBreak(DeviceCoordinate nMaxWidth, DeviceCoordinate nCharExtra, int nFactor) const override; + DeviceCoordinate FillDXArray(std::vector<DeviceCoordinate>* pDXArray) const override; + void GetCaretPositions(int nArraySize, sal_Int32* pCaretXArray) const override; + bool GetNextGlyph(const GlyphItem** pGlyph, DevicePoint& rPos, int& nStart, + const LogicalFontInstance** ppGlyphFont = nullptr, + const vcl::font::PhysicalFontFace** pFallbackFont = nullptr) const override; + bool GetOutline(basegfx::B2DPolyPolygonVector&) const override; + bool IsKashidaPosValid(int nCharPos) const override; + SalLayoutGlyphs GetGlyphs() const final 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 &); + // give up ownership of the initial pBaseLayout taken by the ctor + std::unique_ptr<SalLayout> ReleaseBaseLayout(); + bool LayoutText(vcl::text::ImplLayoutArgs&, const SalLayoutGlyphsImpl*) override; + void AdjustLayout(vcl::text::ImplLayoutArgs&) override; + void InitFont() const override; + + void SetIncomplete(bool bIncomplete); + + template<typename DC> + void ImplAdjustMultiLayout(vcl::text::ImplLayoutArgs& rArgs, + vcl::text::ImplLayoutArgs& rMultiArgs, + const DC* pMultiDXArray); + + 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 +{ + template<typename DC> friend void MultiSalLayout::ImplAdjustMultiLayout( + vcl::text::ImplLayoutArgs& rArgs, + vcl::text::ImplLayoutArgs& rMultiArgs, + const DC* pMultiDXArray); + +public: + GenericSalLayout(LogicalFontInstance&); + ~GenericSalLayout() override; + + void AdjustLayout(vcl::text::ImplLayoutArgs&) final override; + bool LayoutText(vcl::text::ImplLayoutArgs&, const SalLayoutGlyphsImpl*) final override; + void DrawText(SalGraphics&) const final override; + SalLayoutGlyphs GetGlyphs() const final override; + + bool IsKashidaPosValid(int nCharPos) const final override; + + // used by upper layers + DeviceCoordinate GetTextWidth() const final override; + DeviceCoordinate FillDXArray(std::vector<DeviceCoordinate>* pDXArray) const final override; + sal_Int32 GetTextBreak(DeviceCoordinate nMaxWidth, DeviceCoordinate nCharExtra, int nFactor) const final override; + void GetCaretPositions(int nArraySize, sal_Int32* pCaretXArray) const final override; + + // used by display layers + LogicalFontInstance& GetFont() const + { return *m_GlyphItems.GetFont(); } + + bool GetNextGlyph(const GlyphItem** pGlyph, DevicePoint& rPos, int& nStart, + const LogicalFontInstance** ppGlyphFont = nullptr, + const vcl::font::PhysicalFontFace** pFallbackFont = nullptr) const override; + + const SalLayoutGlyphsImpl& GlyphsImpl() const { return m_GlyphItems; } + +private: + // for glyph+font+script fallback + void MoveGlyph(int nStart, double nNewXPos); + void DropGlyph(int nStart); + void Simplify(bool bIsBase); + + GenericSalLayout( const GenericSalLayout& ) = delete; + GenericSalLayout& operator=( const GenericSalLayout& ) = delete; + + template<typename DC> + void ApplyDXArray(const DC*, SalLayoutFlags nLayoutFlags); + void Justify(DeviceCoordinate nNewWidth); + void ApplyAsianKerning(const OUString& rStr); + + void GetCharWidths(std::vector<DeviceCoordinate>& rCharWidths) const; + + void SetNeedFallback(vcl::text::ImplLayoutArgs&, sal_Int32, bool); + + bool HasVerticalAlternate(sal_UCS4 aChar, sal_UCS4 aNextChar); + + void ParseFeatures(std::u16string_view name); + + css::uno::Reference<css::i18n::XBreakIterator> mxBreak; + + SalLayoutGlyphsImpl 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: */ |