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ID and class selectors are ASCII case-insensitive in quirks mode.

Browse source 
https://bugzilla.mozilla.org/show_bug.cgi?id=1363778
This commit is contained in:
Simon Sapin 2017-06-07 19:07:07 +02:00
parent 524fcac191
commit 5bccf98aa4
22 changed files with 313 additions and 191 deletions
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135
components/style/selector_map.rs
View file

@ -7,6 +7,7 @@
use {Atom, LocalName};
use applicable_declarations::ApplicableDeclarationBlock;
use context::QuirksMode;
use dom::TElement;
use fnv::FnvHashMap;
use pdqsort::sort_by;
@ -16,8 +17,8 @@ use selectors::matching::{matches_selector, MatchingContext, ElementSelectorFlag
use selectors::parser::{AncestorHashes, Component, Combinator, SelectorAndHashes, SelectorIter};
use selectors::parser::LocalName as LocalNameSelector;
use smallvec::VecLike;
use std::borrow::Borrow;
use std::collections::HashMap;
use std::collections::hash_map;
use std::hash::Hash;
use stylist::Rule;
@ -66,9 +67,9 @@ impl SelectorMapEntry for SelectorAndHashes<SelectorImpl> {
#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
pub struct SelectorMap<T: SelectorMapEntry> {
/// A hash from an ID to rules which contain that ID selector.
pub id_hash: FnvHashMap<Atom, Vec<T>>,
pub id_hash: MaybeCaseInsensitiveHashMap<Atom, Vec<T>>,
/// A hash from a class name to rules which contain that class selector.
pub class_hash: FnvHashMap<Atom, Vec<T>>,
pub class_hash: MaybeCaseInsensitiveHashMap<Atom, Vec<T>>,
/// A hash from local name to rules which contain that local name selector.
pub local_name_hash: FnvHashMap<LocalName, Vec<T>>,
/// Rules that don't have ID, class, or element selectors.
@ -86,8 +87,8 @@ impl<T: SelectorMapEntry> SelectorMap<T> {
/// Trivially constructs an empty `SelectorMap`.
pub fn new() -> Self {
SelectorMap {
id_hash: HashMap::default(),
class_hash: HashMap::default(),
id_hash: MaybeCaseInsensitiveHashMap::new(),
class_hash: MaybeCaseInsensitiveHashMap::new(),
local_name_hash: HashMap::default(),
other: Vec::new(),
count: 0,
@ -115,6 +116,7 @@ impl SelectorMap<Rule> {
rule_hash_target: &E,
matching_rules_list: &mut V,
context: &mut MatchingContext,
quirks_mode: QuirksMode,
flags_setter: &mut F,
cascade_level: CascadeLevel)
where E: TElement,
@ -128,32 +130,35 @@ impl SelectorMap<Rule> {
// At the end, we're going to sort the rules that we added, so remember where we began.
let init_len = matching_rules_list.len();
if let Some(id) = rule_hash_target.get_id() {
SelectorMap::get_matching_rules_from_hash(element,
&self.id_hash,
&id,
matching_rules_list,
context,
flags_setter,
cascade_level)
if let Some(rules) = self.id_hash.get(&id, quirks_mode) {
SelectorMap::get_matching_rules(element,
rules,
matching_rules_list,
context,
flags_setter,
cascade_level)
}
}
rule_hash_target.each_class(|class| {
SelectorMap::get_matching_rules_from_hash(element,
&self.class_hash,
class,
matching_rules_list,
context,
flags_setter,
cascade_level);
if let Some(rules) = self.class_hash.get(&class, quirks_mode) {
SelectorMap::get_matching_rules(element,
rules,
matching_rules_list,
context,
flags_setter,
cascade_level)
}
});
SelectorMap::get_matching_rules_from_hash(element,
&self.local_name_hash,
rule_hash_target.get_local_name(),
matching_rules_list,
context,
flags_setter,
cascade_level);
if let Some(rules) = self.local_name_hash.get(rule_hash_target.get_local_name()) {
SelectorMap::get_matching_rules(element,
rules,
matching_rules_list,
context,
flags_setter,
cascade_level)
}
SelectorMap::get_matching_rules(element,
&self.other,
@ -167,12 +172,6 @@ impl SelectorMap<Rule> {
|block| (block.specificity, block.source_order()));
}
/// Check whether we have rules for the given id
#[inline]
pub fn has_rules_for_id(&self, id: &Atom) -> bool {
self.id_hash.get(id).is_some()
}
/// Append to `rule_list` all universal Rules (rules with selector `*|*`) in
/// `self` sorted by specificity and source order.
pub fn get_universal_rules(&self,
@ -196,30 +195,6 @@ impl SelectorMap<Rule> {
rules_list
}
fn get_matching_rules_from_hash<E, Str, BorrowedStr: ?Sized, Vector, F>(
element: &E,
hash: &FnvHashMap<Str, Vec<Rule>>,
key: &BorrowedStr,
matching_rules: &mut Vector,
context: &mut MatchingContext,
flags_setter: &mut F,
cascade_level: CascadeLevel)
where E: TElement,
Str: Borrow<BorrowedStr> + Eq + Hash,
BorrowedStr: Eq + Hash,
Vector: VecLike<ApplicableDeclarationBlock>,
F: FnMut(&E, ElementSelectorFlags),
{
if let Some(rules) = hash.get(key) {
SelectorMap::get_matching_rules(element,
rules,
matching_rules,
context,
flags_setter,
cascade_level)
}
}
/// Adds rules in `rules` that match `element` to the `matching_rules` list.
fn get_matching_rules<E, V, F>(element: &E,
rules: &[Rule],
@ -247,16 +222,16 @@ impl SelectorMap<Rule> {
impl<T: SelectorMapEntry> SelectorMap<T> {
/// Inserts into the correct hash, trying id, class, and localname.
pub fn insert(&mut self, entry: T) {
pub fn insert(&mut self, entry: T, quirks_mode: QuirksMode) {
self.count += 1;
if let Some(id_name) = get_id_name(entry.selector()) {
find_push(&mut self.id_hash, id_name, entry);
self.id_hash.entry(id_name, quirks_mode).or_insert_with(Vec::new).push(entry);
return;
}
if let Some(class_name) = get_class_name(entry.selector()) {
find_push(&mut self.class_hash, class_name, entry);
self.class_hash.entry(class_name, quirks_mode).or_insert_with(Vec::new).push(entry);
return;
}
@ -293,13 +268,13 @@ impl<T: SelectorMapEntry> SelectorMap<T> {
/// FIXME(bholley) This overlaps with SelectorMap<Rule>::get_all_matching_rules,
/// but that function is extremely hot and I'd rather not rearrange it.
#[inline]
pub fn lookup<E, F>(&self, element: E, f: &mut F) -> bool
pub fn lookup<E, F>(&self, element: E, quirks_mode: QuirksMode, f: &mut F) -> bool
where E: TElement,
F: FnMut(&T) -> bool
{
// Id.
if let Some(id) = element.get_id() {
if let Some(v) = self.id_hash.get(&id) {
if let Some(v) = self.id_hash.get(&id, quirks_mode) {
for entry in v.iter() {
if !f(&entry) {
return false;
@ -312,7 +287,7 @@ impl<T: SelectorMapEntry> SelectorMap<T> {
let mut done = false;
element.each_class(|class| {
if !done {
if let Some(v) = self.class_hash.get(class) {
if let Some(v) = self.class_hash.get(class, quirks_mode) {
for entry in v.iter() {
if !f(&entry) {
done = true;
@ -355,6 +330,7 @@ impl<T: SelectorMapEntry> SelectorMap<T> {
#[inline]
pub fn lookup_with_additional<E, F>(&self,
element: E,
quirks_mode: QuirksMode,
additional_id: Option<Atom>,
additional_classes: &[Atom],
f: &mut F)
@ -363,13 +339,13 @@ impl<T: SelectorMapEntry> SelectorMap<T> {
F: FnMut(&T) -> bool
{
// Do the normal lookup.
if !self.lookup(element, f) {
if !self.lookup(element, quirks_mode, f) {
return false;
}
// Check the additional id.
if let Some(id) = additional_id {
if let Some(v) = self.id_hash.get(&id) {
if let Some(v) = self.id_hash.get(&id, quirks_mode) {
for entry in v.iter() {
if !f(&entry) {
return false;
@ -380,7 +356,7 @@ impl<T: SelectorMapEntry> SelectorMap<T> {
// Check the additional classes.
for class in additional_classes {
if let Some(v) = self.class_hash.get(class) {
if let Some(v) = self.class_hash.get(class, quirks_mode) {
for entry in v.iter() {
if !f(&entry) {
return false;
@ -472,3 +448,32 @@ fn find_push<Str: Eq + Hash, V>(map: &mut FnvHashMap<Str, Vec<V>>,
value: V) {
map.entry(key).or_insert_with(Vec::new).push(value)
}
/// Wrapper for FnvHashMap that does ASCII-case-insensitive lookup in quirks mode.
#[derive(Debug)]
#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
pub struct MaybeCaseInsensitiveHashMap<K: Hash + Eq, V>(FnvHashMap<K, V>);
impl<V> MaybeCaseInsensitiveHashMap<Atom, V> {
/// Empty map
pub fn new() -> Self {
MaybeCaseInsensitiveHashMap(FnvHashMap::default())
}
/// HashMap::entry
pub fn entry(&mut self, mut key: Atom, quirks_mode: QuirksMode) -> hash_map::Entry<Atom, V> {
if quirks_mode == QuirksMode::Quirks {
key = key.to_ascii_lowercase()
}
self.0.entry(key)
}
/// HashMap::get
pub fn get(&self, key: &Atom, quirks_mode: QuirksMode) -> Option<&V> {
if quirks_mode == QuirksMode::Quirks {
self.0.get(&key.to_ascii_lowercase())
} else {
self.0.get(key)
}
}
}