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ladybird/Libraries/LibWeb/Layout/BlockContainer.h

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Meta: Add license header to source files As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
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/*
Meta: Update my e-mail address everywhere
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* Copyright (c) 2018-2021, Andreas Kling <andreas@ladybird.org>
Meta: Add license header to source files As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
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*
Everything: Move to SPDX license identifiers in all files. SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
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* SPDX-License-Identifier: BSD-2-Clause
Meta: Add license header to source files As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
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*/
LibHTML: Start fleshing out a basic layout tree.
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#pragma once
LibWeb: Rename LayoutNode classes and move them into Layout namespace Bring the names of various boxes closer to spec language. This should hopefully make things easier to understand and hack on. :^) Some notable changes: - LayoutNode -> Layout::Node - LayoutBox -> Layout::Box - LayoutBlock -> Layout::BlockBox - LayoutReplaced -> Layout::ReplacedBox - LayoutDocument -> Layout::InitialContainingBlockBox - LayoutText -> Layout::TextNode - LayoutInline -> Layout::InlineNode Note that this is not strictly a "box tree" as we also hang inline/text nodes in the same tree, and they don't generate boxes. (Instead, they contribute line box fragments to their containing block!)
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#include <LibWeb/Layout/Box.h>
LibWeb: Rename directory LibHTML => LibWeb Let's rename this to LibWeb since it aims to provide more parts of the web platform than just HTML. :^)
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#include <LibWeb/Layout/LineBox.h>
LibHTML: Start fleshing out a basic layout tree.
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LibWeb: Rename LayoutNode classes and move them into Layout namespace Bring the names of various boxes closer to spec language. This should hopefully make things easier to understand and hack on. :^) Some notable changes: - LayoutNode -> Layout::Node - LayoutBox -> Layout::Box - LayoutBlock -> Layout::BlockBox - LayoutReplaced -> Layout::ReplacedBox - LayoutDocument -> Layout::InitialContainingBlockBox - LayoutText -> Layout::TextNode - LayoutInline -> Layout::InlineNode Note that this is not strictly a "box tree" as we also hang inline/text nodes in the same tree, and they don't generate boxes. (Instead, they contribute line box fragments to their containing block!)
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namespace Web::Layout {
LibWeb: Move everything into the Web namespace
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LibWeb: Use W3C urls for CSS-DISPLAY spec links
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// https://www.w3.org/TR/css-display/#block-container
LibWeb: Rename Layout::BlockBox => BlockContainer There's a subtle difference here. A "block box" in the spec is a block-level box, while a "block container" is a box whose children are either all inline-level boxes in an IFC, or all block-level boxes participating in a BFC. Notably, an "inline-block" box is a "block container" but not a "block box" since it is itself inline-level.
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class BlockContainer : public Box {
LibGC+Everywhere: Factor out a LibGC from LibJS Resulting in a massive rename across almost everywhere! Alongside the namespace change, we now have the following names: * JS::NonnullGCPtr -> GC::Ref * JS::GCPtr -> GC::Ptr * JS::HeapFunction -> GC::Function * JS::CellImpl -> GC::Cell * JS::Handle -> GC::Root
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GC_CELL(BlockContainer, Box);
LibWeb: Make the layout tree GC-allocated This removes a set of complex reference cycles between DOM, layout tree and browsing context. It also makes lifetimes much easier to reason about, as the DOM and layout trees are now free to keep each other alive.
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LibHTML: Start fleshing out a basic layout tree.
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public:
LibWeb: Make CSS::ComputedProperties GC-allocated
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BlockContainer(DOM::Document&, DOM::Node*, GC::Ref<CSS::ComputedProperties>);
LibWeb: Allocate CSS::ComputedValues objects on the heap This makes them cheap to move around, since we can store them in a NonnullOwnPtr instead of memcopying 2584(!) bytes. Drastically reduces the chance of stack overflow while building the layout tree for deeply nested DOMs (since tree building was putting these things on the stack). This change also exposed a completely unnecessary ComputedValues deep copy in block layout.
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BlockContainer(DOM::Document&, DOM::Node*, NonnullOwnPtr<CSS::ComputedValues>);
LibWeb: Rename Layout::BlockBox => BlockContainer There's a subtle difference here. A "block box" in the spec is a block-level box, while a "block container" is a box whose children are either all inline-level boxes in an IFC, or all block-level boxes participating in a BFC. Notably, an "inline-block" box is a "block container" but not a "block box" since it is itself inline-level.
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virtual ~BlockContainer() override;
LibHTML: Start fleshing out a basic layout tree.
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LibWeb/Layout: Rename BlockContainer::paint{_box => able_with_lines}() It returns a PaintableBox (a PaintableWithLines, to be specific), not a 'PaintBox'. paintable_box() without the cast is already available through BlockContainer's Box base class, we don't need to shadow it.
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Painting::PaintableWithLines const* paintable_with_lines() const;
LibWeb: Make Painting::Box virtual and add Painting::BoxWithLines BlockContainer paint boxes are the only ones that have line boxes associated, so let's not waste memory on line boxes in all the other types of boxes. This also adds Layout::Box::paint_box() and the more tightly typed Layout::BlockContainer::paint_box() to get at the paint box from the corresponding layout box.
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LibGC+Everywhere: Factor out a LibGC from LibJS Resulting in a massive rename across almost everywhere! Alongside the namespace change, we now have the following names: * JS::NonnullGCPtr -> GC::Ref * JS::GCPtr -> GC::Ptr * JS::HeapFunction -> GC::Function * JS::CellImpl -> GC::Cell * JS::Handle -> GC::Root
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virtual GC::Ptr<Painting::Paintable> create_paintable() const override;
LibWeb: Let Paintable perform the painting This patch adds a bunch of Paintable subclasses, each corresponding to the Layout::Node subclasses that had a paint() override. All painting logic is moved from layout nodes into their corresponding paintables. Paintables are now created by asking a Layout::Box to produce one: static NonnullOwnPtr<Paintable> Layout::Box::create_paintable() Note that inline nodes still have their painting logic. Since they are not boxes, and all paintables have a corresponding box, we'll need to come up with some other solution for them.
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LibWeb: Add fast_is<T>() for some DOM and layout node subclasses The generic is<T>() uses dynamic_cast which is fine in the majority of cases, but when one of them shows up in profiles, we can make it faster by answering the is-a question manually.
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private:
LibWeb: Rename Layout::Node::is_block_box() => is_block_container()
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virtual bool is_block_container() const final { return true; }
LibHTML: Start fleshing out a basic layout tree.
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};
LibHTML: Implement the <blink> element Just in time for Serenity's 1st birthday, here is the <blink> element! This patch adds a bunch of different mechanisms to enable partial repaints of the layout tree (LayoutNode::set_needs_display())) It also adds LayoutNode::is_visible(), which can be toggled to prevent a LayoutNode from rendering anything (it still takes up space though.)
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LibWeb: Add fast_is<T>() for some DOM and layout node subclasses The generic is<T>() uses dynamic_cast which is fine in the majority of cases, but when one of them shows up in profiles, we can make it faster by answering the is-a question manually.
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template<>
LibWeb: Rename Layout::Node::is_block_box() => is_block_container()
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inline bool Node::fast_is<BlockContainer>() const { return is_block_container(); }
LibWeb: Add fast_is<T>() for some DOM and layout node subclasses The generic is<T>() uses dynamic_cast which is fine in the majority of cases, but when one of them shows up in profiles, we can make it faster by answering the is-a question manually.
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LibHTML: Add is<T> and to<T> helpers for LayoutNode class family
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}
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