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Auto merge of #15128 - nox:load-fixes, r=Ms2ger

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Simplify how we handle script scheduling and delaying the load event

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bors-servo 2017-01-20 13:41:32 -08:00 • committed by GitHub
commit 830fe189ad
2 changed files with 41 additions and 44 deletions
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82
components/script/dom/document.rs
View file

@ -229,7 +229,7 @@ pub struct Document {
/// https://html.spec.whatwg.org/multipage/#list-of-scripts-that-will-execute-in-order-as-soon-as-possible
asap_in_order_scripts_list: PendingInOrderScriptVec,
/// https://html.spec.whatwg.org/multipage/#set-of-scripts-that-will-execute-as-soon-as-possible
asap_scripts_set: DOMRefCell<VecDeque<PendingScript>>,
asap_scripts_set: DOMRefCell<Vec<JS<HTMLScriptElement>>>,
/// https://html.spec.whatwg.org/multipage/#concept-n-noscript
/// True if scripting is enabled for all scripts in this document
scripting_enabled: Cell<bool>,
@ -1547,29 +1547,15 @@ impl Document {
loader.finish_load(&load);
}
if let LoadType::Script(_) = load {
self.process_deferred_scripts();
self.process_asap_scripts();
}
if let Some(parser) = self.get_current_parser() {
let ready_to_be_executed = match self.pending_parsing_blocking_script.borrow_mut().as_mut() {
Some(pending) => {
if self.script_blocking_stylesheets_count.get() > 0 {
return;
}
if let Some(pair) = pending.take_result() {
Some(pair)
} else {
return;
}
},
None => None,
};
if let Some((element, result)) = ready_to_be_executed {
*self.pending_parsing_blocking_script.borrow_mut() = None;
parser.resume_with_pending_parsing_blocking_script(&element, result);
}
match load {
LoadType::Stylesheet(_) => {
self.process_deferred_scripts();
self.process_pending_parsing_blocking_script();
},
LoadType::PageSource(_) => {
self.process_deferred_scripts();
},
_ => {},
}
if !self.loader.borrow().is_blocked() && !self.loader.borrow().events_inhibited() {
@ -1594,23 +1580,42 @@ impl Document {
/// https://html.spec.whatwg.org/multipage/#prepare-a-script step 22.d.
pub fn pending_parsing_blocking_script_loaded(&self, element: &HTMLScriptElement, result: ScriptResult) {
let mut blocking_script = self.pending_parsing_blocking_script.borrow_mut();
let entry = blocking_script.as_mut().unwrap();
assert!(&*entry.element == element);
entry.loaded(result);
{
let mut blocking_script = self.pending_parsing_blocking_script.borrow_mut();
let entry = blocking_script.as_mut().unwrap();
assert!(&*entry.element == element);
entry.loaded(result);
}
self.process_pending_parsing_blocking_script();
}
fn process_pending_parsing_blocking_script(&self) {
if self.script_blocking_stylesheets_count.get() > 0 {
return;
}
let pair = self.pending_parsing_blocking_script
.borrow_mut()
.as_mut()
.and_then(PendingScript::take_result);
if let Some((element, result)) = pair {
*self.pending_parsing_blocking_script.borrow_mut() = None;
self.get_current_parser().unwrap().resume_with_pending_parsing_blocking_script(&element, result);
}
}
pub fn add_asap_script(&self, script: &HTMLScriptElement) {
self.asap_scripts_set.borrow_mut().push_back(PendingScript::new(script));
self.asap_scripts_set.borrow_mut().push(JS::from_ref(script));
}
/// https://html.spec.whatwg.org/multipage/#the-end step 3.
/// https://html.spec.whatwg.org/multipage/#prepare-a-script step 22.d.
pub fn asap_script_loaded(&self, element: &HTMLScriptElement, result: ScriptResult) {
let mut scripts = self.asap_scripts_set.borrow_mut();
let idx = scripts.iter().position(|entry| &*entry.element == element).unwrap();
scripts.swap(0, idx);
scripts[0].loaded(result);
{
let mut scripts = self.asap_scripts_set.borrow_mut();
let idx = scripts.iter().position(|entry| &**entry == element).unwrap();
scripts.swap_remove(idx);
}
element.execute(result);
}
pub fn push_asap_in_order_script(&self, script: &HTMLScriptElement) {
@ -1623,14 +1628,6 @@ impl Document {
element: &HTMLScriptElement,
result: ScriptResult) {
self.asap_in_order_scripts_list.loaded(element, result);
}
fn process_asap_scripts(&self) {
let pair = self.asap_scripts_set.borrow_mut().front_mut().and_then(PendingScript::take_result);
if let Some((element, result)) = pair {
self.asap_scripts_set.borrow_mut().pop_front();
element.execute(result);
}
while let Some((element, result)) = self.asap_in_order_scripts_list.take_next_ready_to_be_executed() {
element.execute(result);
}
@ -1643,10 +1640,11 @@ impl Document {
/// https://html.spec.whatwg.org/multipage/#prepare-a-script step 22.d.
pub fn deferred_script_loaded(&self, element: &HTMLScriptElement, result: ScriptResult) {
self.deferred_scripts.loaded(element, result);
self.process_deferred_scripts();
}
/// https://html.spec.whatwg.org/multipage/#the-end step 3.
pub fn process_deferred_scripts(&self) {
fn process_deferred_scripts(&self) {
if self.ready_state.get() != DocumentReadyState::Interactive {
return;
}

3
components/script/dom/servoparser/mod.rs
View file

@ -359,9 +359,8 @@ impl ServoParser {
window.reflow(ReflowGoal::ForDisplay, ReflowQueryType::NoQuery, ReflowReason::FirstLoad);
}
// Steps 3-12 are in other castles, namely process_deferred_scripts and finish_load.
// Steps 3-12 are in another castle, namely finish_load.
let url = self.tokenizer.borrow().url().clone();
self.document.process_deferred_scripts();
self.document.finish_load(LoadType::PageSource(url));
}
}