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Merge normal and important declarations in style rules.

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Have a single Vec instead of two. Fix #3426
This commit is contained in:
Simon Sapin 2016-08-19 16:14:06 +02:00
parent 577d2dc3fa
commit 16bbc2f26e
11 changed files with 248 additions and 221 deletions
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103
components/script/dom/element.rs
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@ -80,7 +80,6 @@ use std::cell::{Cell, Ref};
use std::convert::TryFrom;
use std::default::Default;
use std::fmt;
use std::mem;
use std::sync::Arc;
use std::sync::atomic::{AtomicUsize, Ordering};
use string_cache::{Atom, Namespace, QualName};
@ -329,7 +328,9 @@ impl LayoutElementHelpers for LayoutJS<Element> {
{
#[inline]
fn from_declaration(rule: PropertyDeclaration) -> DeclarationBlock {
DeclarationBlock::from_declarations(Arc::new(vec![rule]))
DeclarationBlock::from_declarations(
Arc::new(vec![(rule, Importance::Normal)]),
Importance::Normal)
}
let bgcolor = if let Some(this) = self.downcast::<HTMLBodyElement>() {
@ -761,20 +762,11 @@ impl Element {
fn remove(element: &Element, property: &str) {
let mut inline_declarations = element.style_attribute.borrow_mut();
if let &mut Some(ref mut declarations) = &mut *inline_declarations {
let index = declarations.normal
let index = declarations.declarations
.iter()
.position(|decl| decl.matches(property));
.position(|&(ref decl, _)| decl.matches(property));
if let Some(index) = index {
Arc::make_mut(&mut declarations.normal).remove(index);
return;
}
let index = declarations.important
.iter()
.position(|decl| decl.matches(property));
if let Some(index) = index {
Arc::make_mut(&mut declarations.important).remove(index);
return;
Arc::make_mut(&mut declarations.declarations).remove(index);
}
}
}
@ -786,47 +778,29 @@ impl Element {
pub fn update_inline_style(&self,
declarations: Vec<PropertyDeclaration>,
importance: Importance) {
fn update(element: &Element, mut declarations: Vec<PropertyDeclaration>,
fn update(element: &Element, declarations: Vec<PropertyDeclaration>,
importance: Importance) {
let mut inline_declarations = element.style_attribute().borrow_mut();
if let &mut Some(ref mut existing_declarations) = &mut *inline_declarations {
let existing_declarations = if importance.important() {
&mut existing_declarations.important
} else {
&mut existing_declarations.normal
};
// Usually, the reference count will be 1 here. But transitions could make it greater
// than that.
let existing_declarations = Arc::make_mut(existing_declarations);
let existing_declarations = Arc::make_mut(&mut existing_declarations.declarations);
for mut incoming_declaration in declarations {
let mut replaced = false;
'outer: for incoming_declaration in declarations {
for existing_declaration in &mut *existing_declarations {
if existing_declaration.name() == incoming_declaration.name() {
mem::swap(existing_declaration, &mut incoming_declaration);
replaced = true;
break;
if existing_declaration.0.name() == incoming_declaration.name() {
*existing_declaration = (incoming_declaration, importance);
continue 'outer;
}
}
if !replaced {
existing_declarations.push(incoming_declaration);
}
existing_declarations.push((incoming_declaration, importance));
}
return;
}
let (important, normal) = if importance.important() {
(declarations, vec![])
} else {
(vec![], declarations)
};
*inline_declarations = Some(PropertyDeclarationBlock {
important: Arc::new(important),
normal: Arc::new(normal),
declarations: Arc::new(declarations.into_iter().map(|d| (d, importance)).collect()),
});
}
@ -836,30 +810,18 @@ impl Element {
pub fn set_inline_style_property_priority(&self,
properties: &[&str],
importance: Importance) {
new_importance: Importance) {
{
let mut inline_declarations = self.style_attribute().borrow_mut();
if let &mut Some(ref mut declarations) = &mut *inline_declarations {
let (from, to) = if importance == Importance::Important {
(&mut declarations.normal, &mut declarations.important)
} else {
(&mut declarations.important, &mut declarations.normal)
};
// Usually, the reference counts of `from` and `to` will be 1 here. But transitions
// could make them greater than that.
let from = Arc::make_mut(from);
let to = Arc::make_mut(to);
let mut new_from = Vec::new();
for declaration in from.drain(..) {
let name = declaration.name();
if properties.iter().any(|p| name == **p) {
to.push(declaration)
} else {
new_from.push(declaration)
}
}
mem::replace(from, new_from);
// Usually, the reference counts of `from` and `to` will be 1 here. But transitions
// could make them greater than that.
let declarations = Arc::make_mut(&mut declarations.declarations);
for &mut (ref declaration, ref mut importance) in declarations {
if properties.iter().any(|p| declaration.name() == **p) {
*importance = new_importance
}
}
}
}
@ -868,25 +830,12 @@ impl Element {
pub fn get_inline_style_declaration(&self,
property: &Atom)
-> Option<Ref<PropertyDeclaration>> {
-> Option<Ref<(PropertyDeclaration, Importance)>> {
ref_filter_map(self.style_attribute.borrow(), |inline_declarations| {
inline_declarations.as_ref().and_then(|declarations| {
declarations.normal
declarations.declarations
.iter()
.chain(declarations.important.iter())
.find(|decl| decl.matches(&property))
})
})
}
pub fn get_important_inline_style_declaration(&self,
property: &Atom)
-> Option<Ref<PropertyDeclaration>> {
ref_filter_map(self.style_attribute.borrow(), |inline_declarations| {
inline_declarations.as_ref().and_then(|declarations| {
declarations.important
.iter()
.find(|decl| decl.matches(&property))
.find(|&&(ref decl, _)| decl.matches(&property))
})
})
}