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layout: Don't rerun selector matching unless we need to when resizing

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the window.
This commit is contained in:
Patrick Walton 2015-05-04 12:49:46 -07:00
parent 92f46e3149
commit be8a5a2939
4 changed files with 61 additions and 38 deletions
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36
components/script/dom/window.rs
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@ -490,6 +490,7 @@ pub trait WindowHelpers {
fn init_browser_context(self, doc: JSRef<Document>, frame_element: Option<JSRef<Element>>);
fn load_url(self, href: DOMString);
fn handle_fire_timer(self, timer_id: TimerId);
fn force_reflow(self, goal: ReflowGoal, query_type: ReflowQueryType, reason: ReflowReason);
fn reflow(self, goal: ReflowGoal, query_type: ReflowQueryType, reason: ReflowReason);
fn join_layout(self);
fn layout(&self) -> &LayoutRPC;
@ -566,24 +567,19 @@ impl<'a> WindowHelpers for JSRef<'a, Window> {
*self.browser_context.borrow_mut() = None;
}
/// Reflows the page if it's possible to do so and the page is dirty. This method will wait
/// for the layout thread to complete (but see the `TODO` below). If there is no window size
/// yet, the page is presumed invisible and no reflow is performed.
/// Reflows the page unconditionally. This method will wait for the layout thread to complete
/// (but see the `TODO` below). If there is no window size yet, the page is presumed invisible
/// and no reflow is performed.
///
/// TODO(pcwalton): Only wait for style recalc, since we have off-main-thread layout.
fn reflow(self, goal: ReflowGoal, query_type: ReflowQueryType, reason: ReflowReason) {
fn force_reflow(self, goal: ReflowGoal, query_type: ReflowQueryType, reason: ReflowReason) {
let document = self.Document().root();
let root = document.r().GetDocumentElement().root();
let root = match root.r() {
Some(root) => root,
None => return,
};
let root: JSRef<Node> = NodeCast::from_ref(root);
if query_type == ReflowQueryType::NoQuery && !root.get_has_dirty_descendants() {
debug!("root has no dirty descendants; avoiding reflow (reason {:?})", reason);
return
}
let window_size = match self.window_size.get() {
Some(window_size) => window_size,
@ -642,6 +638,28 @@ impl<'a> WindowHelpers for JSRef<'a, Window> {
}
}
/// Reflows the page if it's possible to do so and the page is dirty. This method will wait
/// for the layout thread to complete (but see the `TODO` below). If there is no window size
/// yet, the page is presumed invisible and no reflow is performed.
///
/// TODO(pcwalton): Only wait for style recalc, since we have off-main-thread layout.
fn reflow(self, goal: ReflowGoal, query_type: ReflowQueryType, reason: ReflowReason) {
let document = self.Document().root();
let root = document.r().GetDocumentElement().root();
let root = match root.r() {
Some(root) => root,
None => return,
};
let root: JSRef<Node> = NodeCast::from_ref(root);
if query_type == ReflowQueryType::NoQuery && !root.get_has_dirty_descendants() {
debug!("root has no dirty descendants; avoiding reflow (reason {:?})", reason);
return
}
self.force_reflow(goal, query_type, reason)
}
// FIXME(cgaebel): join_layout is racey. What if the compositor triggers a
// reflow between the "join complete" message and returning from this
// function?