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Split out is_element and is_text_node into a helper trait.

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This commit is contained in:
Bobby Holley 2016-09-20 16:51:48 -07:00
parent 66c736194d
commit e6bbff110a
6 changed files with 50 additions and 39 deletions
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18
components/style/dom.rs
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@ -64,7 +64,16 @@ pub trait TRestyleDamage : Debug + PartialEq + BitOr<Output=Self> + Copy {
fn rebuild_and_reflow() -> Self;
}
pub trait TNode : Sized + Copy + Clone {
/// Simple trait to provide basic information about the type of an element.
///
/// We avoid exposing the full type id, since computing it in the general case
/// would be difficult for Gecko nodes.
pub trait NodeInfo {
fn is_element(&self) -> bool;
fn is_text_node(&self) -> bool;
}
pub trait TNode : Sized + Copy + Clone + NodeInfo {
type ConcreteElement: TElement<ConcreteNode = Self, ConcreteDocument = Self::ConcreteDocument>;
type ConcreteDocument: TDocument<ConcreteNode = Self, ConcreteElement = Self::ConcreteElement>;
type ConcreteRestyleDamage: TRestyleDamage;
@ -73,13 +82,6 @@ pub trait TNode : Sized + Copy + Clone {
fn to_unsafe(&self) -> UnsafeNode;
unsafe fn from_unsafe(n: &UnsafeNode) -> Self;
/// Returns whether this is a text node. It turns out that this is all the style system cares
/// about, and thus obviates the need to compute the full type id, which would be expensive in
/// Gecko.
fn is_text_node(&self) -> bool;
fn is_element(&self) -> bool;
fn dump(self);
fn dump_style(self);