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serenity/Userland/Libraries/LibWeb/Layout/InlineFormattingContext.h
Andreas Kling c9700e100e LibWeb: Start making our layout system "transactional"
This patch adds a map of Layout::Node to FormattingState::NodeState.
Instead of updating layout nodes incrementally as layout progresses
through the formatting contexts, all updates are now written to the
corresponding NodeState instead.

At the end of layout, FormattingState::commit() is called, which
transfers all the values from the NodeState objects to the Node.

This will soon allow us to perform completely non-destructive layouts
which don't affect the tree.

Note that there are many imperfections here, and still many places
where we assign to the NodeState, but later read directly from the Node
instead. I'm just committing at this stage to make subsequent diffs
easier to understand.
2022-02-21 18:35:12 +01:00

41 lines
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C++

/*
* Copyright (c) 2020-2022, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Types.h>
#include <LibWeb/Forward.h>
#include <LibWeb/Layout/BlockContainer.h>
#include <LibWeb/Layout/FormattingContext.h>
namespace Web::Layout {
class InlineFormattingContext final : public FormattingContext {
public:
InlineFormattingContext(FormattingState&, BlockContainer const& containing_block, BlockFormattingContext& parent);
~InlineFormattingContext();
BlockFormattingContext& parent();
BlockFormattingContext const& parent() const;
BlockContainer const& containing_block() const { return static_cast<BlockContainer const&>(context_box()); }
virtual void run(Box const&, LayoutMode) override;
void dimension_box_on_line(Box const&, LayoutMode);
struct AvailableSpaceForLineInfo {
float left { 0 };
float right { 0 };
};
AvailableSpaceForLineInfo available_space_for_line(float y) const;
private:
void generate_line_boxes(LayoutMode);
};
}