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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
//! Traits that nodes must implement. Breaks the otherwise-cyclic dependency between layout and
//! style.
use legacy::{IntegerAttribute, LengthAttribute, SimpleColorAttribute, UnsignedIntegerAttribute};
use selectors::AttrSelector;
use servo_util::str::{LengthOrPercentageOrAuto, SimpleColor};
use string_cache::{Atom, Namespace};
pub trait TNode<'a, E: TElement<'a>> : Clone + Copy {
fn parent_node(self) -> Option<Self>;
fn first_child(self) -> Option<Self>;
fn last_child(self) -> Option<Self>;
fn prev_sibling(self) -> Option<Self>;
fn next_sibling(self) -> Option<Self>;
fn is_document(self) -> bool;
fn is_element(self) -> bool;
fn as_element(self) -> E;
fn match_attr(self, attr: &AttrSelector, test: |&str| -> bool) -> bool;
fn is_html_element_in_html_document(self) -> bool;
fn has_changed(self) -> bool;
unsafe fn set_changed(self, value: bool);
fn is_dirty(self) -> bool;
unsafe fn set_dirty(self, value: bool);
fn has_dirty_siblings(self) -> bool;
unsafe fn set_dirty_siblings(self, value: bool);
fn has_dirty_descendants(self) -> bool;
unsafe fn set_dirty_descendants(self, value: bool);
}
pub trait TElement<'a> : Copy {
fn get_attr(self, namespace: &Namespace, attr: &Atom) -> Option<&'a str>;
fn get_attrs(self, attr: &Atom) -> Vec<&'a str>;
fn get_link(self) -> Option<&'a str>;
fn get_local_name(self) -> &'a Atom;
fn get_namespace(self) -> &'a Namespace;
fn get_hover_state(self) -> bool;
fn get_id(self) -> Option<Atom>;
fn get_disabled_state(self) -> bool;
fn get_enabled_state(self) -> bool;
fn get_checked_state(self) -> bool;
fn has_class(self, name: &Atom) -> bool;
fn has_nonzero_border(self) -> bool;
// Ordinarily I wouldn't use callbacks like this, but the alternative is
// really messy, since there is a `JSRef` and a `RefCell` involved. Maybe
// in the future when we have associated types and/or a more convenient
// JS GC story... --pcwalton
fn each_class(self, callback: |&Atom|);
}
pub trait TElementAttributes : Copy {
fn get_length_attribute(self, attribute: LengthAttribute) -> LengthOrPercentageOrAuto;
fn get_integer_attribute(self, attribute: IntegerAttribute) -> Option<i32>;
fn get_unsigned_integer_attribute(self, attribute: UnsignedIntegerAttribute) -> Option<u32>;
fn get_simple_color_attribute(self, attribute: SimpleColorAttribute) -> Option<SimpleColor>;
}
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