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Implement attribute restyle hints.

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Fixes #6942.
This commit is contained in:
Bobby Holley 2015-11-05 09:58:06 -08:00
parent 47744d95ad
commit 7fa7936657
9 changed files with 237 additions and 101 deletions
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27
components/script/dom/document.rs
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@ -88,7 +88,6 @@ use net_traits::{AsyncResponseTarget, PendingAsyncLoad};
use num::ToPrimitive;
use script_task::{MainThreadScriptMsg, Runnable};
use script_traits::{MouseButton, TouchEventType, TouchId, UntrustedNodeAddress};
use selectors::states::*;
use std::ascii::AsciiExt;
use std::borrow::ToOwned;
use std::boxed::FnBox;
@ -102,6 +101,7 @@ use std::rc::Rc;
use std::sync::Arc;
use std::sync::mpsc::channel;
use string_cache::{Atom, QualName};
use style::restyle_hints::ElementSnapshot;
use style::stylesheets::Stylesheet;
use time;
use url::Url;
@ -188,8 +188,9 @@ pub struct Document {
/// This field is set to the document itself for inert documents.
/// https://html.spec.whatwg.org/multipage/#appropriate-template-contents-owner-document
appropriate_template_contents_owner_document: MutNullableHeap<JS<Document>>,
/// For each element that has had a state change since the last restyle, track the original state.
modified_elements: DOMRefCell<HashMap<JS<Element>, ElementState>>,
/// For each element that has had a state or attribute change since the last restyle,
/// track the original condition of the element.
modified_elements: DOMRefCell<HashMap<JS<Element>, ElementSnapshot>>,
/// http://w3c.github.io/touch-events/#dfn-active-touch-point
active_touch_points: DOMRefCell<Vec<JS<Touch>>>,
}
@ -1275,7 +1276,7 @@ pub enum DocumentSource {
#[allow(unsafe_code)]
pub trait LayoutDocumentHelpers {
unsafe fn is_html_document_for_layout(&self) -> bool;
unsafe fn drain_modified_elements(&self) -> Vec<(LayoutJS<Element>, ElementState)>;
unsafe fn drain_modified_elements(&self) -> Vec<(LayoutJS<Element>, ElementSnapshot)>;
}
#[allow(unsafe_code)]
@ -1287,7 +1288,7 @@ impl LayoutDocumentHelpers for LayoutJS<Document> {
#[inline]
#[allow(unrooted_must_root)]
unsafe fn drain_modified_elements(&self) -> Vec<(LayoutJS<Element>, ElementState)> {
unsafe fn drain_modified_elements(&self) -> Vec<(LayoutJS<Element>, ElementSnapshot)> {
let mut elements = (*self.unsafe_get()).modified_elements.borrow_mut_for_layout();
let drain = elements.drain();
let layout_drain = drain.map(|(k, v)| (k.to_layout(), v));
@ -1457,7 +1458,21 @@ impl Document {
pub fn element_state_will_change(&self, el: &Element) {
let mut map = self.modified_elements.borrow_mut();
map.entry(JS::from_ref(el)).or_insert(el.get_state());
let snapshot = map.entry(JS::from_ref(el)).or_insert(ElementSnapshot::new());
if snapshot.state.is_none() {
snapshot.state = Some(el.get_state());
}
}
pub fn element_attr_will_change(&self, el: &Element) {
let mut map = self.modified_elements.borrow_mut();
let mut snapshot = map.entry(JS::from_ref(el)).or_insert(ElementSnapshot::new());
if snapshot.attrs.is_none() {
let attrs = el.attrs().iter()
.map(|attr| (attr.identifier().clone(), attr.value().clone()))
.collect();
snapshot.attrs = Some(attrs);
}
}
}