Mirrors/servo
1
0
Fork 0
mirror of https://github.com/servo/servo.git synced 2025-08-07 06:25:32 +01:00
Code Issues Projects Releases Packages Wiki Activity

script: Don't avoid all the mutation notification methods when the style attribute changes.

Browse source 
Styling was correct because of the explicit dirtiness, but still not fun.

Some things, like dynamic updates to with things like [style~="color"] ~ foo
selectors, were pretty broken, because we didn't take snapshots of those
attributes.
This commit is contained in:
Emilio Cobos Álvarez 2017-01-29 01:25:56 +01:00
parent cb304fd42c
commit 31ecc9b692
No known key found for this signature in database
GPG key ID: 056B727BB9C1027C
4 changed files with 93 additions and 55 deletions
Download patch file Download diff file Expand all files Collapse all files

83
components/script/dom/element.rs
View file

@ -824,31 +824,6 @@ impl Element {
}
}
// this sync method is called upon modification of the style_attribute property,
// therefore, it should not trigger subsequent mutation events
pub fn set_style_attr(&self, new_value: String) {
let mut new_style = AttrValue::String(new_value);
if let Some(style_attr) = self.attrs.borrow().iter().find(|a| a.name() == &local_name!("style")) {
style_attr.swap_value(&mut new_style);
return;
}
// explicitly not calling the push_new_attribute convenience method
// in order to avoid triggering mutation events
let window = window_from_node(self);
let attr = Attr::new(&window,
local_name!("style"),
new_style,
local_name!("style"),
ns!(),
None,
Some(self));
assert!(attr.GetOwnerElement().r() == Some(self));
self.attrs.borrow_mut().push(JS::from_ref(&attr));
}
pub fn serialize(&self, traversal_scope: TraversalScope) -> Fallible<DOMString> {
let mut writer = vec![];
match serialize(&mut writer,
@ -2121,18 +2096,43 @@ impl VirtualMethods for Element {
match attr.local_name() {
&local_name!("style") => {
// Modifying the `style` attribute might change style.
*self.style_attribute.borrow_mut() =
mutation.new_value(attr).map(|value| {
let win = window_from_node(self);
Arc::new(RwLock::new(parse_style_attribute(
&value,
&doc.base_url(),
win.css_error_reporter(),
ParserContextExtraData::default())))
});
if node.is_in_doc() {
node.dirty(NodeDamage::NodeStyleDamaged);
}
*self.style_attribute.borrow_mut() = match mutation {
AttributeMutation::Set(..) => {
// This is the fast path we use from
// CSSStyleDeclaration.
//
// Juggle a bit to keep the borrow checker happy
// while avoiding the extra clone.
let is_declaration = match *attr.value() {
AttrValue::Declaration(..) => true,
_ => false,
};
let block = if is_declaration {
let mut value = AttrValue::String(String::new());
attr.swap_value(&mut value);
let (serialization, block) = match value {
AttrValue::Declaration(s, b) => (s, b),
_ => unreachable!(),
};
let mut value = AttrValue::String(serialization);
attr.swap_value(&mut value);
block
} else {
let win = window_from_node(self);
Arc::new(RwLock::new(parse_style_attribute(
&attr.value(),
&doc.base_url(),
win.css_error_reporter(),
ParserContextExtraData::default())))
};
Some(block)
}
AttributeMutation::Removed => {
None
}
};
},
&local_name!("id") => {
*self.id_attribute.borrow_mut() =
@ -2716,7 +2716,7 @@ impl Element {
}
}
#[derive(Clone, Copy, PartialEq)]
#[derive(Clone, Copy)]
pub enum AttributeMutation<'a> {
/// The attribute is set, keep track of old value.
/// https://dom.spec.whatwg.org/#attribute-is-set
@ -2728,6 +2728,13 @@ pub enum AttributeMutation<'a> {
}
impl<'a> AttributeMutation<'a> {
pub fn is_removal(&self) -> bool {
match *self {
AttributeMutation::Removed => true,
AttributeMutation::Set(..) => false,
}
}
pub fn new_value<'b>(&self, attr: &'b Attr) -> Option<Ref<'b, AttrValue>> {
match *self {
AttributeMutation::Set(_) => Some(attr.value()),