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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/. */
use dom::bindings::codegen::Bindings::HistoryBinding;
use dom::bindings::codegen::Bindings::HistoryBinding::HistoryMethods;
use dom::bindings::codegen::Bindings::LocationBinding::LocationBinding::LocationMethods;
use dom::bindings::codegen::Bindings::WindowBinding::WindowMethods;
use dom::bindings::error::{Error, ErrorResult, Fallible};
use dom::bindings::inheritance::Castable;
use dom::bindings::js::{JS, Root};
use dom::bindings::reflector::{Reflector, reflect_dom_object};
use dom::globalscope::GlobalScope;
use dom::window::Window;
use dom_struct::dom_struct;
use ipc_channel::ipc;
use msg::constellation_msg::TraversalDirection;
use script_traits::ScriptMsg;
// https://html.spec.whatwg.org/multipage/#the-history-interface
#[dom_struct]
pub struct History {
reflector_: Reflector,
window: JS<Window>,
}
impl History {
pub fn new_inherited(window: &Window) -> History {
History {
reflector_: Reflector::new(),
window: JS::from_ref(&window),
}
}
pub fn new(window: &Window) -> Root<History> {
reflect_dom_object(box History::new_inherited(window),
window,
HistoryBinding::Wrap)
}
}
impl History {
fn traverse_history(&self, direction: TraversalDirection) -> ErrorResult {
if !self.window.Document().is_fully_active() {
return Err(Error::Security);
}
let msg = ScriptMsg::TraverseHistory(direction);
let _ = self.window.upcast::<GlobalScope>().script_to_constellation_chan().send(msg);
Ok(())
}
}
impl HistoryMethods for History {
// https://html.spec.whatwg.org/multipage/#dom-history-length
fn GetLength(&self) -> Fallible<u32> {
if !self.window.Document().is_fully_active() {
return Err(Error::Security);
}
let (sender, recv) = ipc::channel().expect("Failed to create channel to send jsh length.");
let msg = ScriptMsg::JointSessionHistoryLength(sender);
let _ = self.window.upcast::<GlobalScope>().script_to_constellation_chan().send(msg);
Ok(recv.recv().unwrap())
}
// https://html.spec.whatwg.org/multipage/#dom-history-go
fn Go(&self, delta: i32) -> ErrorResult {
let direction = if delta > 0 {
TraversalDirection::Forward(delta as usize)
} else if delta < 0 {
TraversalDirection::Back(-delta as usize)
} else {
return self.window.Location().Reload();
};
self.traverse_history(direction)
}
// https://html.spec.whatwg.org/multipage/#dom-history-back
fn Back(&self) -> ErrorResult {
self.traverse_history(TraversalDirection::Back(1))
}
// https://html.spec.whatwg.org/multipage/#dom-history-forward
fn Forward(&self) -> ErrorResult {
self.traverse_history(TraversalDirection::Forward(1))
}
}
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