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ladybird/Libraries/LibWeb/Layout/CheckBox.h

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LibWeb: Add basic support for <input type=checkbox> This is implemented entirely inside LibWeb, there is no GUI::CheckBox widget instantiated, unlike other input types. All input types should be moved to this new style of implementation.
2020-09-11 13:17:39 -03:00
/*
Meta: Update my e-mail address everywhere
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* Copyright (c) 2020, Andreas Kling <andreas@ladybird.org>
LibWeb: Add basic support for <input type=checkbox> This is implemented entirely inside LibWeb, there is no GUI::CheckBox widget instantiated, unlike other input types. All input types should be moved to this new style of implementation.
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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
LibWeb: Add basic support for <input type=checkbox> This is implemented entirely inside LibWeb, there is no GUI::CheckBox widget instantiated, unlike other input types. All input types should be moved to this new style of implementation.
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*/
#pragma once
LibWeb: Clean up HTMLInputElement-related includes This mainly uses forward declarations as appropriate for input element related files. This reduces the number of targets being built when we change HTMLInputElement.h from 430 to 44.
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#include <LibWeb/Forward.h>
LibWeb: Separate the active element and the element being activated We were conflating elements being the active element and elements being activated. The :active pseudo class is supposed to be based on whether an element will have its activation behavior run upon a button being released. Store whether an element is being activated as a flag that is set/reset by EventHandler. Doing this allows label elements to visually activate their control without doing a weird paintable hack, so the Labelable classes have been yeeted.
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#include <LibWeb/Layout/ReplacedBox.h>
LibWeb: Add basic support for <input type=checkbox> This is implemented entirely inside LibWeb, there is no GUI::CheckBox widget instantiated, unlike other input types. All input types should be moved to this new style of implementation.
2020-09-11 13:17:39 -03:00
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: Add basic support for <input type=checkbox> This is implemented entirely inside LibWeb, there is no GUI::CheckBox widget instantiated, unlike other input types. All input types should be moved to this new style of implementation.
2020-09-11 13:17:39 -03:00
LibWeb: Separate the active element and the element being activated We were conflating elements being the active element and elements being activated. The :active pseudo class is supposed to be based on whether an element will have its activation behavior run upon a button being released. Store whether an element is being activated as a flag that is set/reset by EventHandler. Doing this allows label elements to visually activate their control without doing a weird paintable hack, so the Labelable classes have been yeeted.
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class CheckBox final : public ReplacedBox {
LibWeb: Make layout nodes refcounted Move the layout tree from GC allocation to refcounted ownership so removed layout and paint subtrees are destroyed synchronously instead of waiting for the next GC sweep. This dramatically reduces GC memory usage peaks after layout tree churn and makes it easier for memory use to fall back after large document updates. Update layout factories, tree traversal, SVG layout node creation, paintable back-pointers, and pseudo-element layout links to use RefPtr ownership. Make display: contents follow the same shape as Blink and WebKit: the element itself does not create a layout node, and its children are flattened into the nearest layout parent. Wrap direct non-whitespace text in an anonymous inline node when the boxless element contributes inherited style to that text. Use an internal inline wrapper for display: contents pseudo-elements so generated content can still participate in layout, painting, hit testing, and pseudo-element queries. Keep CSSOM reporting the computed display value from the pseudo style, not the internal wrapper. Remove the retained out-of-tree layout node list and its testing hook, since the flattened model does not need a side owner for boxless elements. Add coverage for inherited text style, dynamic insertion order, pseudo-element hit testing, and computed style queries.
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LAYOUT_NODE(CheckBox, ReplacedBox);
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.
2022-10-17 09:41:50 -03:00
LibWeb: Add basic support for <input type=checkbox> This is implemented entirely inside LibWeb, there is no GUI::CheckBox widget instantiated, unlike other input types. All input types should be moved to this new style of implementation.
2020-09-11 13:17:39 -03:00
public:
LibWeb: Make computed style data refcounted Move ComputedProperties and CascadedProperties out of the GC. They no longer contain strong references to GC-managed data. Keep computed styles alive from DOM elements and animation updates with RefPtr. Pass style into layout constructors by reference, since layout only copies the values it needs while building nodes. Use GC::Weak for cascade source links, so entries no longer keep the style declaration or shadow root alive.
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CheckBox(DOM::Document&, HTML::HTMLInputElement&, CSS::ComputedProperties const&);
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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virtual ~CheckBox() override;
LibWeb: Add basic support for <input type=checkbox> This is implemented entirely inside LibWeb, there is no GUI::CheckBox widget instantiated, unlike other input types. All input types should be moved to this new style of implementation.
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private:
LibWeb/Layout: Don't inject natural size in prepare_for_replaced_layout Instead, compute them on demand. This affects ReplacedBox and its subclasses. This commit is centered around a new Box::auto_content_box_size method. It returns a SizeWithAspectRatio representing the natural size of a replaced element, or the size derived from attributes for text input and textarea. These values are used when the corresponding axis is auto or indefinite. Although introducing this API choke-point for sizing replaced and replaced-like elements was the main goal, it's notable that layout becomes more robust in the face of dynamic changes due to reduced potential for stale size values (at the cost of extra calculations and allocations).
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virtual CSS::SizeWithAspectRatio compute_auto_content_box_size() const override { return { 13, 13, {} }; }
LibWeb: Make Paintable tree ref-counted The Paintable tree and its supplemental painting data structures were GC allocated because that was the easiest way to manage it and avoid leaks introduced by ref cycles. This included the Paintable subclasses themselves plus StackingContext, ChromeWidget, Scrollbar, ResizeHandle, and scroll-frame state. We are now trying to reduce GC allocation churn on layout and painting updates, so keeping this short-lived rendering tree outside the JS heap is a better fit. Move Paintable to RefCountedTreeNode, make painting helpers ref-counted or weakly reference Paintables, and update the layout and event-handler call sites to use RefPtr/WeakPtr ownership.
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virtual RefPtr<Painting::Paintable> create_paintable() const override;
LibWeb: Add basic support for <input type=checkbox> This is implemented entirely inside LibWeb, there is no GUI::CheckBox widget instantiated, unlike other input types. All input types should be moved to this new style of implementation.
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};
}
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