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Rewrite how parser handles script scheduling

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This commit is contained in:
Anthony Ramine 2016-11-20 01:33:21 +01:00
parent e1eff691f8
commit c801327eab
10 changed files with 54 additions and 100 deletions
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37
components/script/dom/document.rs
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@ -142,12 +142,6 @@ pub enum IsHTMLDocument {
NonHTMLDocument,
}
#[derive(PartialEq)]
enum ParserBlockedByScript {
Blocked,
Unblocked,
}
#[derive(JSTraceable, HeapSizeOf)]
#[must_root]
pub struct StylesheetInDocument {
@ -1546,15 +1540,13 @@ impl Document {
self.process_asap_scripts();
}
if self.maybe_execute_parser_blocking_script() == ParserBlockedByScript::Blocked {
return;
}
// A finished resource load can potentially unblock parsing. In that case, resume the
// parser so its loop can find out.
if let Some(parser) = self.get_current_parser() {
if parser.is_suspended() {
parser.resume();
if let Some(script) = self.pending_parsing_blocking_script.get() {
if self.script_blocking_stylesheets_count.get() > 0 || !script.is_ready_to_be_executed() {
return;
}
self.pending_parsing_blocking_script.set(None);
parser.resume_with_pending_parsing_blocking_script(&script);
}
} else if self.reflow_timeout.get().is_none() {
// If we don't have a parser, and the reflow timer has been reset, explicitly
@ -1577,23 +1569,6 @@ impl Document {
}
}
/// If document parsing is blocked on a script, and that script is ready to run,
/// execute it.
/// https://html.spec.whatwg.org/multipage/#ready-to-be-parser-executed
fn maybe_execute_parser_blocking_script(&self) -> ParserBlockedByScript {
let script = match self.pending_parsing_blocking_script.get() {
None => return ParserBlockedByScript::Unblocked,
Some(script) => script,
};
if self.script_blocking_stylesheets_count.get() == 0 && script.is_ready_to_be_executed() {
self.pending_parsing_blocking_script.set(None);
script.execute();
return ParserBlockedByScript::Unblocked;
}
ParserBlockedByScript::Blocked
}
/// https://html.spec.whatwg.org/multipage/#the-end step 3
pub fn process_deferred_scripts(&self) {
if self.ready_state.get() != DocumentReadyState::Interactive {