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Implement diff-based session history

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This new implementation of the session history keeps track of
a single tree of browsing contexts and pipelines which represents
the active entry of the session history and it keeps track of
diffs between adjacent entries. This allows use to traverse across
the joint session history by applying diffs to the active tree.
This commit is contained in:
Connor Brewster 2018-03-26 10:47:01 -05:00
parent 044f19d914
commit f3d068f583
9 changed files with 500 additions and 465 deletions
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14
components/constellation/pipeline.rs
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@ -89,6 +89,9 @@ pub struct Pipeline {
/// Whether this pipeline should be treated as visible for the purposes of scheduling and
/// resource management.
pub visible: bool,
/// The Load Data used to create this pipeline.
pub load_data: LoadData,
}
/// Initial setup data needed to construct a pipeline.
@ -209,7 +212,7 @@ impl Pipeline {
new_pipeline_id: state.id,
browsing_context_id: state.browsing_context_id,
top_level_browsing_context_id: state.top_level_browsing_context_id,
load_data: state.load_data,
load_data: state.load_data.clone(),
window_size: window_size,
pipeline_port: pipeline_port,
content_process_shutdown_chan: Some(layout_content_process_shutdown_chan.clone()),
@ -260,7 +263,7 @@ impl Pipeline {
window_size: window_size,
layout_to_constellation_chan: state.layout_to_constellation_chan,
script_chan: script_chan.clone(),
load_data: state.load_data,
load_data: state.load_data.clone(),
script_port: script_port,
opts: (*opts::get()).clone(),
prefs: PREFS.cloned(),
@ -298,7 +301,8 @@ impl Pipeline {
state.compositor_proxy,
state.is_private,
url,
state.prev_visibility.unwrap_or(true)))
state.prev_visibility.unwrap_or(true),
state.load_data))
}
/// Creates a new `Pipeline`, after the script and layout threads have been
@ -312,7 +316,8 @@ impl Pipeline {
compositor_proxy: CompositorProxy,
is_private: bool,
url: ServoUrl,
visible: bool)
visible: bool,
load_data: LoadData)
-> Pipeline {
let pipeline = Pipeline {
id: id,
@ -327,6 +332,7 @@ impl Pipeline {
running_animations: false,
visible: visible,
is_private: is_private,
load_data: load_data,
};
pipeline.notify_visibility();