зеркало из https://github.com/mozilla/gecko-dev.git
100 строки
2.3 KiB
Rust
100 строки
2.3 KiB
Rust
/* 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/. */
|
|
|
|
//! A type to represent a namespace.
|
|
|
|
use gecko_bindings::structs::nsIAtom;
|
|
use precomputed_hash::PrecomputedHash;
|
|
use std::borrow::Borrow;
|
|
use std::fmt;
|
|
use std::ops::Deref;
|
|
use string_cache::{Atom, WeakAtom};
|
|
|
|
#[macro_export]
|
|
macro_rules! ns {
|
|
() => { $crate::string_cache::Namespace(atom!("")) };
|
|
($s: tt) => { $crate::string_cache::Namespace(atom!($s)) };
|
|
}
|
|
|
|
/// A Gecko namespace is just a wrapped atom.
|
|
#[derive(Debug, PartialEq, Eq, Clone, Default, Hash)]
|
|
pub struct Namespace(pub Atom);
|
|
|
|
impl PrecomputedHash for Namespace {
|
|
#[inline]
|
|
fn precomputed_hash(&self) -> u32 {
|
|
self.0.precomputed_hash()
|
|
}
|
|
}
|
|
|
|
/// A Gecko WeakNamespace is a wrapped WeakAtom.
|
|
#[derive(Hash)]
|
|
pub struct WeakNamespace(WeakAtom);
|
|
|
|
impl Deref for WeakNamespace {
|
|
type Target = WeakAtom;
|
|
|
|
#[inline]
|
|
fn deref(&self) -> &WeakAtom {
|
|
&self.0
|
|
}
|
|
}
|
|
|
|
|
|
impl Deref for Namespace {
|
|
type Target = WeakNamespace;
|
|
|
|
#[inline]
|
|
fn deref(&self) -> &WeakNamespace {
|
|
let weak: *const WeakAtom = &*self.0;
|
|
unsafe {
|
|
&*(weak as *const WeakNamespace)
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<'a> From<&'a str> for Namespace {
|
|
fn from(s: &'a str) -> Self {
|
|
Namespace(Atom::from(s))
|
|
}
|
|
}
|
|
|
|
impl fmt::Display for Namespace {
|
|
fn fmt(&self, w: &mut fmt::Formatter) -> fmt::Result {
|
|
self.0.fmt(w)
|
|
}
|
|
}
|
|
|
|
impl Borrow<WeakNamespace> for Namespace {
|
|
#[inline]
|
|
fn borrow(&self) -> &WeakNamespace {
|
|
self
|
|
}
|
|
}
|
|
|
|
impl WeakNamespace {
|
|
/// Trivially construct a WeakNamespace.
|
|
#[inline]
|
|
pub unsafe fn new<'a>(atom: *mut nsIAtom) -> &'a Self {
|
|
&*(atom as *const WeakNamespace)
|
|
}
|
|
|
|
/// Clone this WeakNamespace to obtain a strong reference to the same
|
|
/// underlying namespace.
|
|
#[inline]
|
|
pub fn clone(&self) -> Namespace {
|
|
Namespace(self.0.clone())
|
|
}
|
|
}
|
|
|
|
impl Eq for WeakNamespace {}
|
|
impl PartialEq for WeakNamespace {
|
|
#[inline]
|
|
fn eq(&self, other: &Self) -> bool {
|
|
let weak: *const WeakNamespace = self;
|
|
let other: *const WeakNamespace = other;
|
|
weak == other
|
|
}
|
|
}
|