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style: Add docs about the lack of device in the stylesheet set.

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Also add a few comments and similar about pending invalidation work, and avoid
passing a device in script, since the work it performs scanning the stylesheet
is just thrown away in the `flush_without_invalidations` call.
This commit is contained in:
Emilio Cobos Álvarez 2017-08-21 20:17:24 +02:00
parent cbf388a5fd
commit 0701c0c953
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GPG key ID: 056B727BB9C1027C
2 changed files with 10 additions and 5 deletions
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13
components/script/dom/document.rs
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@ -2338,6 +2338,11 @@ impl Document {
pub fn flush_stylesheets_for_reflow(&self) -> bool {
// NOTE(emilio): The invalidation machinery is used on the replicated
// list on the layout thread.
//
// FIXME(emilio): This really should differentiate between CSSOM changes
// and normal stylesheets additions / removals, because in the last case
// the layout thread already has that information and we could avoid
// dirtying the whole thing.
let mut stylesheets = self.stylesheets.borrow_mut();
let have_changed = stylesheets.has_changed();
stylesheets.flush_without_invalidation();
@ -2370,11 +2375,10 @@ impl Document {
.unwrap();
let guard = s.shared_lock.read();
let device = self.device();
// FIXME(emilio): Would be nice to remove the clone, etc.
self.stylesheets.borrow_mut().remove_stylesheet(
device.as_ref(),
None,
StyleSheetInDocument {
sheet: s.clone(),
owner: JS::from_ref(owner),
@ -2414,13 +2418,12 @@ impl Document {
let lock = self.style_shared_lock();
let guard = lock.read();
let device = self.device();
match insertion_point {
Some(ip) => {
stylesheets.insert_stylesheet_before(device.as_ref(), sheet, ip, &guard);
stylesheets.insert_stylesheet_before(None, sheet, ip, &guard);
}
None => {
stylesheets.append_stylesheet(device.as_ref(), sheet, &guard);
stylesheets.append_stylesheet(None, sheet, &guard);
}
}
}