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Implement non-visible pipeline and iframe visibility methods

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jmr0 2016-03-09 01:24:46 -05:00
parent ce88b8ed30
commit 2bff131535
14 changed files with 382 additions and 24 deletions
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60
components/script/script_thread.rs
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@ -139,6 +139,8 @@ struct InProgressLoad {
clip_rect: Option<Rect<f32>>,
/// Window is frozen (navigated away while loading for example).
is_frozen: bool,
/// Window is visible.
is_visible: bool,
/// The requested URL of the load.
url: Url,
}
@ -157,6 +159,7 @@ impl InProgressLoad {
window_size: window_size,
clip_rect: None,
is_frozen: false,
is_visible: true,
url: url,
}
}
@ -918,6 +921,10 @@ impl ScriptThread {
self.handle_freeze_msg(pipeline_id),
ConstellationControlMsg::Thaw(pipeline_id) =>
self.handle_thaw_msg(pipeline_id),
ConstellationControlMsg::ChangeFrameVisibilityStatus(pipeline_id, visible) =>
self.handle_visibility_change_msg(pipeline_id, visible),
ConstellationControlMsg::NotifyVisibilityChange(containing_id, pipeline_id, visible) =>
self.handle_visibility_change_complete_msg(containing_id, pipeline_id, visible),
ConstellationControlMsg::MozBrowserEvent(parent_pipeline_id,
subpage_id,
event) =>
@ -1217,6 +1224,55 @@ impl ScriptThread {
reports_chan.send(reports);
}
/// To slow/speed up timers and manage any other script thread resource based on visibility.
/// Returns true if successful.
fn alter_resource_utilization(&self, id: PipelineId, visible: bool) -> bool {
if let Some(root_context) = self.browsing_context.get() {
if let Some(ref inner_context) = root_context.find(id) {
let window = inner_context.active_window();
if visible {
window.speed_up_timers();
} else {
window.slow_down_timers();
}
return true;
}
}
false
}
/// Updates iframe element after a change in visibility
fn handle_visibility_change_complete_msg(&self, containing_id: PipelineId, id: PipelineId, visible: bool) {
if let Some(root_context) = self.browsing_context.get() {
if let Some(ref inner_context) = root_context.find(containing_id) {
if let Some(iframe) = inner_context.active_document().find_iframe_by_pipeline(id) {
iframe.change_visibility_status(visible);
}
}
}
}
/// Handle visibility change message
fn handle_visibility_change_msg(&self, id: PipelineId, visible: bool) {
let resources_altered = self.alter_resource_utilization(id, visible);
// Separate message sent since parent script thread could be different (Iframe of different
// domain)
self.constellation_chan.send(ConstellationMsg::VisibilityChangeComplete(id, visible)).unwrap();
if !resources_altered {
let mut loads = self.incomplete_loads.borrow_mut();
if let Some(ref mut load) = loads.iter_mut().find(|load| load.pipeline_id == id) {
load.is_visible = visible;
return;
}
} else {
return;
}
warn!("change visibility message sent to nonexistent pipeline");
}
/// Handles freeze message
fn handle_freeze_msg(&self, id: PipelineId) {
if let Some(root_context) = self.browsing_context.get() {
@ -1692,6 +1748,10 @@ impl ScriptThread {
window.freeze();
}
if !incomplete.is_visible {
self.alter_resource_utilization(browsing_context.pipeline(), false);
}
context_remover.neuter();
document.get_current_parser().unwrap()