mirror of
https://github.com/servo/servo.git
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4f47b41fa7
The util component specified fnv and smallvec as dependencies and publicly reexported both of them. Several other components utilized these reexports, presumably because fnv and smallvec used to live in the tree so reexporting made the transition easier. These indirect dependencies through the util component are unnecessary. This commit removes the fnv & smallvec crate reexports in the util component. It exchange, it adds fnv & smallvec as dependencies to non-util components wherever needed. Finally, it removes the fnv dependency from util as it is not utilized anywhere in the util component.
65 lines
2.7 KiB
Rust
65 lines
2.7 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//! Legacy presentational attributes defined in the HTML5 specification: `<td width>`,
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//! `<input size>`, and so forth.
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use std::sync::Arc;
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use selectors::tree::TNode;
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use selectors::matching::DeclarationBlock;
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use node::TElementAttributes;
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use properties::PropertyDeclaration;
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use selector_matching::Stylist;
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use smallvec::VecLike;
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/// Legacy presentational attributes that take a nonnegative integer as defined in HTML5 § 2.4.4.2.
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#[derive(Copy, Clone, PartialEq, Eq)]
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pub enum UnsignedIntegerAttribute {
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/// `<td colspan>`
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ColSpan,
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}
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/// Extension methods for `Stylist` that cause rules to be synthesized for legacy attributes.
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pub trait PresentationalHintSynthesis {
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/// Synthesizes rules from various HTML attributes (mostly legacy junk from HTML4) that confer
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/// *presentational hints* as defined in the HTML5 specification. This handles stuff like
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/// `<body bgcolor>`, `<input size>`, `<td width>`, and so forth.
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///
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/// NB: Beware! If you add an attribute to this list, be sure to add it to
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/// `common_style_affecting_attributes` or `rare_style_affecting_attributes` as appropriate. If
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/// you don't, you risk strange random nondeterministic failures due to false positives in
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/// style sharing.
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fn synthesize_presentational_hints_for_legacy_attributes<'a,N,V>(
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&self, node: &N, matching_rules_list: &mut V, shareable: &mut bool)
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where N: TNode<'a>,
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N::Element: TElementAttributes<'a>,
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V: VecLike<DeclarationBlock<Vec<PropertyDeclaration>>>;
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}
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impl PresentationalHintSynthesis for Stylist {
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fn synthesize_presentational_hints_for_legacy_attributes<'a,N,V>(
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&self, node: &N, matching_rules_list: &mut V, shareable: &mut bool)
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where N: TNode<'a>,
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N::Element: TElementAttributes<'a>,
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V: VecLike<DeclarationBlock<Vec<PropertyDeclaration>>> {
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let element = node.as_element();
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let length = matching_rules_list.len();
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element.synthesize_presentational_hints_for_legacy_attributes(matching_rules_list);
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if matching_rules_list.len() != length {
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// Never share style for elements with preshints
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*shareable = false;
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}
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}
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}
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/// A convenience function to create a declaration block from a single declaration. This is
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/// primarily used in `synthesize_rules_for_legacy_attributes`.
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#[inline]
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pub fn from_declaration(rule: PropertyDeclaration) -> DeclarationBlock<Vec<PropertyDeclaration>> {
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DeclarationBlock::from_declarations(Arc::new(vec![rule]))
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}
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