b1fd801436
This is poorly factored. TextNode needs to know whether the most recently inserted fragment on the current line was empty or ended in whitespace. This is used when deciding what to do with leading whitespace in text nodes. Let's keep this working for now, but we should eventually sort this out and make text chunk iteration not depend on this information.
66 lines
1.8 KiB
C++
66 lines
1.8 KiB
C++
/*
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* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
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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/Noncopyable.h>
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#include <LibWeb/Layout/BlockContainer.h>
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#include <LibWeb/Layout/TextNode.h>
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namespace Web::Layout {
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// This class iterates over all the inline-level objects within an inline formatting context.
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// By repeatedly calling next() with the remaining available width on the current line,
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// it returns an "Item" representing the next piece of inline-level content to be placed on the line.
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class InlineLevelIterator {
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AK_MAKE_NONCOPYABLE(InlineLevelIterator);
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AK_MAKE_NONMOVABLE(InlineLevelIterator);
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public:
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struct Item {
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enum class Type {
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Text,
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Element,
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ForcedBreak,
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};
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Type type {};
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Layout::Node* node { nullptr };
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size_t offset_in_node { 0 };
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size_t length_in_node { 0 };
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float width { 0.0f };
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bool should_force_break { false };
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bool is_collapsible_whitespace { false };
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};
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explicit InlineLevelIterator(Layout::BlockContainer& container, LayoutMode layout_mode)
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: m_container(container)
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, m_current_node(container.first_child())
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, m_layout_mode(layout_mode)
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{
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}
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Optional<Item> next(float available_width);
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private:
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void skip_to_next();
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void enter_text_node(Layout::TextNode&, bool previous_is_empty_or_ends_in_whitespace);
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Layout::BlockContainer& m_container;
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Layout::Node* m_current_node { nullptr };
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LayoutMode const m_layout_mode;
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struct TextNodeContext {
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bool do_collapse {};
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bool do_wrap_lines {};
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bool do_respect_linebreaks {};
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TextNode::ChunkIterator chunk_iterator;
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};
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Optional<TextNodeContext> m_text_node_context;
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};
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}
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