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80 lines
2.3 KiB
C++
80 lines
2.3 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/Forward.h"
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#include "LibGfx/Forward.h"
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#include <AK/String.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/Rect.h>
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#include <LibGfx/TextElision.h>
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#include <LibGfx/TextWrapping.h>
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namespace Gfx {
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enum class FitWithinRect {
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Yes,
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No
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};
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// FIXME: This currently isn't an ideal way of doing things; ideally, TextLayout
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// would be doing the rendering by painting individual glyphs. However, this
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// would regress our Unicode bidirectional text support. Therefore, fixing this
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// requires:
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// - Moving the bidirectional algorithm either here, or some place TextLayout
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// can access;
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// - Making TextLayout render the given text into something like a Vector<Line>
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// where:
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// using Line = Vector<DirectionalRun>;
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// struct DirectionalRun {
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// Utf32View glyphs;
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// Vector<int> advance;
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// TextDirection direction;
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// };
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// - Either;
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// a) Making TextLayout output these Lines directly using a given Painter, or
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// b) Taking the Lines from TextLayout and painting each glyph.
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class TextLayout {
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public:
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TextLayout(Gfx::Font const* font, Utf8View const& text, IntRect const& rect)
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: m_font(font)
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, m_text(text)
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, m_rect(rect)
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{
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}
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Font const& font() const { return *m_font; }
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void set_font(Font const* font) { m_font = font; }
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Utf8View const& text() const { return m_text; }
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void set_text(Utf8View const& text) { m_text = text; }
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IntRect const& rect() const { return m_rect; }
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void set_rect(IntRect const& rect) { m_rect = rect; }
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Vector<String, 32> lines(TextElision elision, TextWrapping wrapping, int line_spacing) const
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{
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return wrap_lines(elision, wrapping, line_spacing, FitWithinRect::Yes);
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}
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IntRect bounding_rect(TextWrapping wrapping, int line_spacing) const;
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private:
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Vector<String, 32> wrap_lines(TextElision, TextWrapping, int line_spacing, FitWithinRect) const;
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String elide_text_from_right(Utf8View, bool force_elision) const;
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Font const* m_font;
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Utf8View m_text;
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IntRect m_rect;
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};
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}
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