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Implement history state

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This commit is contained in:
Connor Brewster 2018-04-14 01:53:11 -05:00
parent e4472f7c1f
commit 17bd80a7b1
55 changed files with 316 additions and 359 deletions
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36
components/msg/constellation_msg.rs
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@ -213,6 +213,13 @@ impl PipelineNamespace {
index: BrowsingContextIndex(self.next_index()),
}
}
fn next_history_state_id(&mut self) -> HistoryStateId {
HistoryStateId {
namespace_id: self.id,
index: HistoryStateIndex(self.next_index()),
}
}
}
thread_local!(pub static PIPELINE_NAMESPACE: Cell<Option<PipelineNamespace>> = Cell::new(None));
@ -351,6 +358,35 @@ impl PartialEq<BrowsingContextId> for TopLevelBrowsingContextId {
}
}
#[derive(Clone, Copy, Debug, Deserialize, Eq, Hash, Ord, PartialEq, PartialOrd, Serialize)]
pub struct HistoryStateIndex(pub NonZeroU32);
malloc_size_of_is_0!(HistoryStateIndex);
#[derive(Clone, Copy, Debug, Deserialize, Eq, Hash, MallocSizeOf, Ord, PartialEq, PartialOrd, Serialize)]
pub struct HistoryStateId {
pub namespace_id: PipelineNamespaceId,
pub index: HistoryStateIndex,
}
impl HistoryStateId {
pub fn new() -> HistoryStateId {
PIPELINE_NAMESPACE.with(|tls| {
let mut namespace = tls.get().expect("No namespace set for this thread!");
let next_history_state_id = namespace.next_history_state_id();
tls.set(Some(namespace));
next_history_state_id
})
}
}
impl fmt::Display for HistoryStateId {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
let PipelineNamespaceId(namespace_id) = self.namespace_id;
let HistoryStateIndex(index) = self.index;
write!(fmt, "({},{})", namespace_id, index.get())
}
}
// We provide ids just for unit testing.
pub const TEST_NAMESPACE: PipelineNamespaceId = PipelineNamespaceId(1234);
#[allow(unsafe_code)]