b67d73a661
We now apply first letter styles by splitting text with a first-letter style applied into 2 `TextSliceNode` objects. The `DOM::Text` layout node always points at the non first-letter slice and the first-letter slice is reachable via `TextSliceNode::first_letter_slice()`. First letter splitting works by `TreeBuilder` walking a block container's inline descendants to find the first typographic letter unit per the pattern given in css-pseudo level 4, which is then wrapped in an anonymous inline box styled with the `::first-letter` computed properties. Consumers that map between DOM offsets and layout geometry are updated to visit all slices of a `DOM::Text` through `TextOffsetMapping`.
70 lines
2.4 KiB
C++
70 lines
2.4 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <andreas@ladybird.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 <LibGC/Ptr.h>
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#include <LibWeb/Forward.h>
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namespace Web::Layout {
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class TreeBuilder {
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public:
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TreeBuilder();
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GC::Ptr<Layout::Node> build(DOM::Node&);
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private:
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struct Context {
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bool has_svg_root = false;
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bool layout_top_layer = false;
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bool layout_svg_mask_or_clip_path = false;
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bool layout_svg_pattern = false;
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};
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i32 calculate_list_item_index(DOM::Node&);
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void update_layout_tree_before_children(DOM::Node&, GC::Ref<Layout::Node>, Context&, bool element_has_content_visibility_hidden);
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void update_layout_tree_after_children(DOM::Node&, GC::Ref<Layout::Node>, Context&, bool element_has_content_visibility_hidden);
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void wrap_in_button_layout_tree_if_needed(DOM::Node&, GC::Ref<Layout::Node>);
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enum class MustCreateSubtree {
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No,
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Yes,
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};
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void update_layout_tree(DOM::Node&, Context&, MustCreateSubtree);
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TraversalDecision clear_stale_layout_and_paint_node(DOM::Node&, DOM::Node const* content_visibility_hidden_root = nullptr);
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void push_parent(Layout::NodeWithStyle& node) { m_ancestor_stack.append(node); }
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void pop_parent() { m_ancestor_stack.take_last(); }
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template<CSS::DisplayInternal, typename Callback>
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void for_each_in_tree_with_internal_display(NodeWithStyle& root, Callback);
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template<CSS::DisplayInside, typename Callback>
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void for_each_in_tree_with_inside_display(NodeWithStyle& root, Callback);
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void fixup_tables(NodeWithStyle& root);
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void remove_irrelevant_boxes(NodeWithStyle& root);
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void generate_missing_child_wrappers(NodeWithStyle& root);
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Vector<GC::Root<Box>> generate_missing_parents(NodeWithStyle& root);
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void missing_cells_fixup(Vector<GC::Root<Box>> const&);
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enum class AppendOrPrepend {
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Append,
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Prepend,
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};
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void insert_node_into_inline_or_block_ancestor(Layout::Node&, CSS::Display, AppendOrPrepend);
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GC::Ptr<NodeWithStyle> create_pseudo_element_if_needed(DOM::Element&, CSS::PseudoElement, Optional<AppendOrPrepend>);
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static void create_first_letter_wrapper_if_needed(DOM::Element&, Layout::BlockContainer&);
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void restructure_block_node_in_inline_parent(NodeWithStyleAndBoxModelMetrics&);
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GC::Ptr<Layout::Node> m_layout_root;
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Vector<GC::Ref<Layout::NodeWithStyle>> m_ancestor_stack;
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u32 m_quote_nesting_level { 0 };
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};
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}
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