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ladybird/Libraries/LibWeb/CSS/CSSStyleRule.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) 2018-2020, Andreas Kling <andreas@ladybird.org>
LibWeb: Create base class CSSRule for all CSS rules This is a foundation for handling other ("at") CSS rules.
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* Copyright (c) 2021, the SerenityOS developers.
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: Add the outline of a CSS stylesheet object graph.
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#pragma once
LibWeb: Make CSS::Selector reference counted The end goal is to make the PseudoClass::not_selector be a Selector instead of a String that is repeatedly re-parsed. But since Selector contains a Vector of ComplexSelectors, which each have a Vector of SimpleSelectors, it's probably a good idea to not be passing them around by value anyway. :^)
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#include <AK/NonnullRefPtr.h>
LibWeb/CSS: Make CSSStyleRule be a CSSGroupingRule As part of this, we can now fill in the missing serialization steps. The parsing is a stub for now, and will be filled out in a subsequent commit.
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#include <LibWeb/CSS/CSSGroupingRule.h>
LibWeb: Rename StyleDeclaration => CSSStyleDeclaration to match CSSOM
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#include <LibWeb/CSS/CSSStyleDeclaration.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/CSS/Selector.h>
LibHTML: Add the outline of a CSS stylesheet object graph.
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LibWeb: Move CSS classes into the Web::CSS namespace
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namespace Web::CSS {
LibWeb: Move everything into the Web namespace
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LibWeb/CSS: Make CSSStyleRule be a CSSGroupingRule As part of this, we can now fill in the missing serialization steps. The parsing is a stub for now, and will be filled out in a subsequent commit.
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class CSSStyleRule final : public CSSGroupingRule {
WEB_PLATFORM_OBJECT(CSSStyleRule, CSSGroupingRule);
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_DECLARE_ALLOCATOR(CSSStyleRule);
LibWeb: Apply style rules in order of specificity (kinda) We now sort the matched rules by the specificity of the first selector in them. This is not perfect, since a rule can have multiple selectors, but it is a nice chin-related progression on ACID2. :^)
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LibHTML: Add the outline of a CSS stylesheet object graph.
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public:
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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[[nodiscard]] static GC::Ref<CSSStyleRule> create(JS::Realm&, SelectorList&&, PropertyOwningCSSStyleDeclaration&, CSSRuleList&);
LibHTML: More work on the CSS object model.
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Libraries: Use default constructors/destructors in LibWeb https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#cother-other-default-operation-rules "The compiler is more likely to get the default semantics right and you cannot implement these functions better than the compiler."
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virtual ~CSSStyleRule() override = default;
LibHTML: Add the outline of a CSS stylesheet object graph.
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LibWeb/CSS: Use SelectorList type instead of Vector<NNRP<Selector>>
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SelectorList const& selectors() const { return m_selectors; }
LibWeb/CSS: Parse and use nested style rules For example, this: ```css .foo { color: red; &:hover { color: green; } } ``` now has the same effect as this: ```css .foo { color: red; } .foo:hover { color: green; } ``` CSSStyleRule now has "absolutized selectors", which are its selectors with any `&`s resolved. We use these instead of the "real" selectors when matching them, meaning the style computer doesn't have to know or care about where the selector appears in the CSS document.
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SelectorList const& absolutized_selectors() const;
LibWeb: Make CSSStyleRule::declaration() return a more specific type This removes the need for some hot verify_casts in StyleComputer.
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PropertyOwningCSSStyleDeclaration const& declaration() const { return m_declaration; }
LibHTML: Flesh out the code to dump a StyleSheet object graph.
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LibWeb: Return String from CSSStyleRule::selector_text()
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String selector_text() const;
LibWeb: Add the CSSStyleRule interface with some limited functionality
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void set_selector_text(StringView);
CSSStyleDeclaration* style();
LibWeb: Make CSSStyleRule::qualified_layer_name() return a const-ref And also make it inline. We were spending 8% of selector matching on creating and destroying FlyString copies here. With this change, it's now ~1%.
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[[nodiscard]] FlyString const& qualified_layer_name() const { return parent_layer_internal_qualified_name(); }
LibWeb/CSS: Implement cascade layers (aka `@layer`) This is done quite simply for now, there are certainly optimizations that can and should be made later. With this we now pass: - http://wpt.live/css/css-cascade/layer-basic.html - http://wpt.live/css/css-cascade/layer-important.html - http://wpt.live/css/css-cascade/layer-statement-copy-crash.html - http://wpt.live/css/css-cascade/layer-stylesheet-sharing-important.html - http://wpt.live/css/css-cascade/layer-stylesheet-sharing.html - http://wpt.live/css/css-cascade/layer-vs-inline-style.html
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LibHTML: Add the outline of a CSS stylesheet object graph.
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private:
LibWeb/CSS: Use SelectorList type instead of Vector<NNRP<Selector>>
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CSSStyleRule(JS::Realm&, SelectorList&&, PropertyOwningCSSStyleDeclaration&, CSSRuleList&);
LibWeb+LibJS: Make the EventTarget hierarchy (incl. DOM) GC-allocated This is a monster patch that turns all EventTargets into GC-allocated PlatformObjects. Their C++ wrapper classes are removed, and the LibJS garbage collector is now responsible for their lifetimes. There's a fair amount of hacks and band-aids in this patch, and we'll have a lot of cleanup to do after this.
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LibJS: Make Cell::initialize() return void Stop worrying about tiny OOMs. Work towards #20405
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virtual void initialize(JS::Realm&) override;
LibWeb: Make CSSStyleDeclaration GC-allocated
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virtual void visit_edges(Cell::Visitor&) override;
LibWeb/CSS: Parse and use nested style rules For example, this: ```css .foo { color: red; &:hover { color: green; } } ``` now has the same effect as this: ```css .foo { color: red; } .foo:hover { color: green; } ``` CSSStyleRule now has "absolutized selectors", which are its selectors with any `&`s resolved. We use these instead of the "real" selectors when matching them, meaning the style computer doesn't have to know or care about where the selector appears in the CSS document.
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virtual void clear_caches() override;
LibWeb: Port CSSRule::serialized from DeprecatedString to String
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virtual String serialized() const override;
LibWeb: Implement CSSRule and CSSStyleDeclaration serialization There are a handful of FIXME's here, but this seems generally good. Note that CSS *values* don't get serialized in a spec-compliant way since we currently rely on StyleValue::to_string() which is ad-hoc.
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LibWeb: Add & when setting nested style rule's selector text When we first parse a nested CSSStyleRule's selectors, we treat them as relative selectors and then patch them up with an `&` as needed. However, we weren't doing this when assigning the `cssText` attribute. So, let's do that! This gives us a couple of subtest passes. :^)
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CSSStyleRule const* parent_style_rule() const;
LibWeb/CSS: Use SelectorList type instead of Vector<NNRP<Selector>>
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SelectorList m_selectors;
LibWeb/CSS: Parse and use nested style rules For example, this: ```css .foo { color: red; &:hover { color: green; } } ``` now has the same effect as this: ```css .foo { color: red; } .foo:hover { color: green; } ``` CSSStyleRule now has "absolutized selectors", which are its selectors with any `&`s resolved. We use these instead of the "real" selectors when matching them, meaning the style computer doesn't have to know or care about where the selector appears in the CSS document.
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mutable Optional<SelectorList> m_cached_absolutized_selectors;
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::Ref<PropertyOwningCSSStyleDeclaration> m_declaration;
LibHTML: Add the outline of a CSS stylesheet object graph.
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};
LibWeb: Move everything into the Web namespace
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LibWeb: Add fast_is<T> for CSSRule subclasses Since we already have a type enum for these, let's use it to make is<T> bypass dynamic_cast for CSS rules. These were often near the top of random browser profiles.
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template<>
inline bool CSSRule::fast_is<CSSStyleRule>() const { return type() == CSSRule::Type::Style; }
LibWeb: Move everything into the Web namespace
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}
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