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https://github.com/RGBCube/serenity
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78 lines
3.1 KiB
C++
78 lines
3.1 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <LibWeb/Forward.h>
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namespace Web::Layout {
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class FormattingContext {
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public:
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virtual void run(Box&, LayoutMode) = 0;
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Box& context_box() { return *m_context_box; }
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const Box& context_box() const { return *m_context_box; }
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FormattingContext* parent() { return m_parent; }
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const FormattingContext* parent() const { return m_parent; }
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virtual bool is_block_formatting_context() const { return false; }
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static bool creates_block_formatting_context(const Box&);
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static float compute_width_for_replaced_element(const ReplacedBox&);
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static float compute_height_for_replaced_element(const ReplacedBox&);
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protected:
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FormattingContext(Box&, FormattingContext* parent = nullptr);
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virtual ~FormattingContext();
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void layout_inside(Box&, LayoutMode);
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struct ShrinkToFitResult {
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float preferred_width { 0 };
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float preferred_minimum_width { 0 };
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};
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static float tentative_width_for_replaced_element(const ReplacedBox&, const CSS::Length& width);
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static float tentative_height_for_replaced_element(const ReplacedBox&, const CSS::Length& width);
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ShrinkToFitResult calculate_shrink_to_fit_widths(Box&);
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void layout_absolutely_positioned_element(Box&);
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void compute_width_for_absolutely_positioned_element(Box&);
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void compute_width_for_absolutely_positioned_non_replaced_element(Box&);
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void compute_width_for_absolutely_positioned_replaced_element(ReplacedBox&);
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void compute_height_for_absolutely_positioned_element(Box&);
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void compute_height_for_absolutely_positioned_non_replaced_element(Box&);
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void compute_height_for_absolutely_positioned_replaced_element(ReplacedBox&);
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FormattingContext* m_parent { nullptr };
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Box* m_context_box { nullptr };
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};
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}
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