07c968075f
This implements a general framework for legacy presentational attributes to the DOM and style calculation, so that adding more of them later will be straightforward. Source-Repo: https://github.com/servo/servo Source-Revision: 0aeecfc41d5f0c637960fcddf87cc2db3e5efeea
55 lines
2.1 KiB
Rust
55 lines
2.1 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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//! Traits that nodes must implement. Breaks the otherwise-cyclic dependency between layout and
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//! style.
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use legacy::{IntegerAttribute, LengthAttribute};
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use selectors::AttrSelector;
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use servo_util::str::LengthOrPercentageOrAuto;
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use string_cache::{Atom, Namespace};
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pub trait TNode<'a, E: TElement<'a>> : Clone + Copy {
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fn parent_node(self) -> Option<Self>;
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fn first_child(self) -> Option<Self>;
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fn prev_sibling(self) -> Option<Self>;
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fn next_sibling(self) -> Option<Self>;
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fn is_document(self) -> bool;
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fn is_element(self) -> bool;
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fn as_element(self) -> E;
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fn match_attr(self, attr: &AttrSelector, test: |&str| -> bool) -> bool;
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fn is_html_element_in_html_document(self) -> bool;
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fn is_dirty(self) -> bool;
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unsafe fn set_dirty(self, value: bool);
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fn has_dirty_descendants(self) -> bool;
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unsafe fn set_dirty_descendants(self, value: bool);
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}
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pub trait TElement<'a> : Copy {
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fn get_attr(self, namespace: &Namespace, attr: &Atom) -> Option<&'a str>;
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fn get_attrs(self, attr: &Atom) -> Vec<&'a str>;
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fn get_link(self) -> Option<&'a str>;
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fn get_local_name(self) -> &'a Atom;
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fn get_namespace(self) -> &'a Namespace;
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fn get_hover_state(self) -> bool;
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fn get_id(self) -> Option<Atom>;
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fn get_disabled_state(self) -> bool;
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fn get_enabled_state(self) -> bool;
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fn has_class(self, name: &Atom) -> bool;
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// Ordinarily I wouldn't use callbacks like this, but the alternative is
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// really messy, since there is a `JSRef` and a `RefCell` involved. Maybe
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// in the future when we have associated types and/or a more convenient
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// JS GC story... --pcwalton
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fn each_class(self, callback: |&Atom|);
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}
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pub trait TElementAttributes : Copy {
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fn get_length_attribute(self, attribute: LengthAttribute) -> LengthOrPercentageOrAuto;
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fn get_integer_attribute(self, attribute: IntegerAttribute) -> Option<i32>;
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}
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