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84 lines
2.9 KiB
Rust
84 lines
2.9 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::LocationMethods;
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use dom::bindings::codegen::Bindings::WindowBinding::WindowMethods;
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use dom::bindings::inheritance::Castable;
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use dom::bindings::js::{JS, Root};
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use dom::bindings::reflector::{Reflector, reflect_dom_object};
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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 as ConstellationMsg;
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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: JS<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: JS::from_ref(&window),
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}
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}
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pub fn new(window: &Window) -> Root<History> {
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reflect_dom_object(box 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) {
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let global_scope = self.window.upcast::<GlobalScope>();
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let pipeline = global_scope.pipeline_id();
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let msg = ConstellationMsg::TraverseHistory(Some(pipeline), direction);
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let _ = global_scope.constellation_chan().send(msg);
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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 Length(&self) -> u32 {
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let global_scope = self.window.upcast::<GlobalScope>();
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let pipeline = global_scope.pipeline_id();
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let (sender, recv) = ipc::channel().expect("Failed to create channel to send jsh length.");
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let msg = ConstellationMsg::JointSessionHistoryLength(pipeline, sender);
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let _ = global_scope.constellation_chan().send(msg);
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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) {
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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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self.window.Location().Reload();
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return;
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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) {
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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) {
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self.traverse_history(TraversalDirection::Forward(1));
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}
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}
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