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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, sin-ack <sin-ack@protonmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include "AK/Forward.h"
#include "LibGfx/Forward.h"
#include <AK/String.h>
#include <AK/Utf32View.h>
#include <AK/Utf8View.h>
#include <AK/Vector.h>
#include <LibGfx/Font.h>
#include <LibGfx/Rect.h>
#include <LibGfx/TextElision.h>
#include <LibGfx/TextWrapping.h>
namespace Gfx {
enum class FitWithinRect {
Yes,
No
};
// FIXME: This currently isn't an ideal way of doing things; ideally, TextLayout
// would be doing the rendering by painting individual glyphs. However, this
// would regress our Unicode bidirectional text support. Therefore, fixing this
// requires:
// - Moving the bidirectional algorithm either here, or some place TextLayout
// can access;
// - Making TextLayout render the given text into something like a Vector<Line>
// where:
// using Line = Vector<DirectionalRun>;
// struct DirectionalRun {
// Utf32View glyphs;
// Vector<int> advance;
// TextDirection direction;
// };
// - Either;
// a) Making TextLayout output these Lines directly using a given Painter, or
// b) Taking the Lines from TextLayout and painting each glyph.
class TextLayout {
public:
TextLayout(Gfx::Font const* font, Utf8View const& text, IntRect const& rect)
: m_font(font)
, m_text(text)
, m_rect(rect)
{
}
Font const& font() const { return *m_font; }
void set_font(Font const* font) { m_font = font; }
Utf8View const& text() const { return m_text; }
void set_text(Utf8View const& text) { m_text = text; }
IntRect const& rect() const { return m_rect; }
void set_rect(IntRect const& rect) { m_rect = rect; }
Vector<String, 32> lines(TextElision elision, TextWrapping wrapping, int line_spacing) const
{
return wrap_lines(elision, wrapping, line_spacing, FitWithinRect::Yes);
}
IntRect bounding_rect(TextWrapping wrapping, int line_spacing) const;
private:
Vector<String, 32> wrap_lines(TextElision, TextWrapping, int line_spacing, FitWithinRect) const;
String elide_text_from_right(Utf8View, bool force_elision) const;
Font const* m_font;
Utf8View m_text;
IntRect m_rect;
};
}
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