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11e7d72686
Append text chunks to either the start or end of the text fragment, depending on the text direction. The direction is determined by what script its code points are from.
78 lines
2 KiB
C++
78 lines
2 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, sin-ack <sin-ack@protonmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/ByteString.h>
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#include <AK/CharacterTypes.h>
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#include <AK/Forward.h>
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#include <AK/Utf32View.h>
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#include <AK/Utf8View.h>
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#include <AK/Vector.h>
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#include <LibGfx/Font/Font.h>
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#include <LibGfx/FontCascadeList.h>
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#include <LibGfx/Forward.h>
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#include <LibGfx/Rect.h>
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namespace Gfx {
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struct DrawGlyph {
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FloatPoint position;
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u32 glyph_id;
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void translate_by(FloatPoint const& delta)
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{
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position.translate_by(delta);
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}
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};
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struct DrawEmoji {
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FloatPoint position;
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Gfx::Bitmap const* emoji;
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void translate_by(FloatPoint const& delta)
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{
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position.translate_by(delta);
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}
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};
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using DrawGlyphOrEmoji = Variant<DrawGlyph, DrawEmoji>;
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class GlyphRun : public RefCounted<GlyphRun> {
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public:
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enum class TextType {
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Common,
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ContextDependent,
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EndPadding,
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Ltr,
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Rtl,
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};
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GlyphRun(Vector<Gfx::DrawGlyphOrEmoji>&& glyphs, NonnullRefPtr<Font> font, TextType text_type)
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: m_glyphs(move(glyphs))
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, m_font(move(font))
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, m_text_type(text_type)
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{
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}
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[[nodiscard]] Font const& font() const { return m_font; }
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[[nodiscard]] TextType text_type() const { return m_text_type; }
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[[nodiscard]] Vector<Gfx::DrawGlyphOrEmoji> const& glyphs() const { return m_glyphs; }
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[[nodiscard]] Vector<Gfx::DrawGlyphOrEmoji>& glyphs() { return m_glyphs; }
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[[nodiscard]] bool is_empty() const { return m_glyphs.is_empty(); }
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void append(Gfx::DrawGlyphOrEmoji glyph) { m_glyphs.append(glyph); }
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private:
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Vector<Gfx::DrawGlyphOrEmoji> m_glyphs;
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NonnullRefPtr<Font> m_font;
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TextType m_text_type;
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};
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void for_each_glyph_position(FloatPoint baseline_start, Utf8View string, Gfx::Font const& font, Function<void(DrawGlyphOrEmoji const&)> callback, Optional<float&> width = {});
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}
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