forked from mirrors/gecko-dev
c08c32ca01
http://www.robohornet.org gives a score of 101.36 on master, and 102.68 with this PR. The latter is slightly better, but probably within noise level. So it looks like this PR does not affect DOM performance. This is expected since `Box::new` is defined as: ```rust impl<T> Box<T> { #[inline(always)] pub fn new(x: T) -> Box<T> { box x } } ``` With inlining, it should compile to the same as box syntax. Source-Repo: https://github.com/servo/servo Source-Revision: a9022be0c3e30249845ca5947ac0c0a6743c7991 --HG-- extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear extra : subtree_revision : 97a17674f72dbfcb99552fe4877789f149ccfc84
87 lines
3 KiB
Rust
87 lines
3 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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use dom::bindings::codegen::Bindings::HistoryBinding;
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use dom::bindings::codegen::Bindings::HistoryBinding::HistoryMethods;
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use dom::bindings::codegen::Bindings::LocationBinding::LocationBinding::LocationMethods;
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use dom::bindings::codegen::Bindings::WindowBinding::WindowMethods;
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use dom::bindings::error::{Error, ErrorResult, Fallible};
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use dom::bindings::inheritance::Castable;
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use dom::bindings::reflector::{Reflector, reflect_dom_object};
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use dom::bindings::root::{Dom, DomRoot};
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use dom::globalscope::GlobalScope;
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use dom::window::Window;
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use dom_struct::dom_struct;
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use ipc_channel::ipc;
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use msg::constellation_msg::TraversalDirection;
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use script_traits::ScriptMsg;
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// https://html.spec.whatwg.org/multipage/#the-history-interface
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#[dom_struct]
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pub struct History {
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reflector_: Reflector,
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window: Dom<Window>,
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}
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impl History {
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pub fn new_inherited(window: &Window) -> History {
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History {
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reflector_: Reflector::new(),
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window: Dom::from_ref(&window),
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}
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}
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pub fn new(window: &Window) -> DomRoot<History> {
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reflect_dom_object(Box::new(History::new_inherited(window)),
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window,
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HistoryBinding::Wrap)
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}
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}
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impl History {
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fn traverse_history(&self, direction: TraversalDirection) -> ErrorResult {
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if !self.window.Document().is_fully_active() {
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return Err(Error::Security);
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}
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let msg = ScriptMsg::TraverseHistory(direction);
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let _ = self.window.upcast::<GlobalScope>().script_to_constellation_chan().send(msg);
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Ok(())
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}
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}
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impl HistoryMethods for History {
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// https://html.spec.whatwg.org/multipage/#dom-history-length
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fn GetLength(&self) -> Fallible<u32> {
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if !self.window.Document().is_fully_active() {
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return Err(Error::Security);
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}
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let (sender, recv) = ipc::channel().expect("Failed to create channel to send jsh length.");
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let msg = ScriptMsg::JointSessionHistoryLength(sender);
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let _ = self.window.upcast::<GlobalScope>().script_to_constellation_chan().send(msg);
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Ok(recv.recv().unwrap())
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}
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// https://html.spec.whatwg.org/multipage/#dom-history-go
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fn Go(&self, delta: i32) -> ErrorResult {
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let direction = if delta > 0 {
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TraversalDirection::Forward(delta as usize)
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} else if delta < 0 {
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TraversalDirection::Back(-delta as usize)
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} else {
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return self.window.Location().Reload();
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};
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self.traverse_history(direction)
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}
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// https://html.spec.whatwg.org/multipage/#dom-history-back
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fn Back(&self) -> ErrorResult {
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self.traverse_history(TraversalDirection::Back(1))
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}
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// https://html.spec.whatwg.org/multipage/#dom-history-forward
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fn Forward(&self) -> ErrorResult {
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self.traverse_history(TraversalDirection::Forward(1))
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}
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}
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