mirror of
https://github.com/servo/servo.git
synced 2025-06-06 16:45:39 +00:00
4506f0d30c
Servo currently uses `heapsize`, but Stylo/Gecko use `malloc_size_of`. `malloc_size_of` is better -- it handles various cases that `heapsize` does not -- so this patch changes Servo to use `malloc_size_of`. This patch makes the following changes to the `malloc_size_of` crate. - Adds `MallocSizeOf` trait implementations for numerous types, some built-in (e.g. `VecDeque`), some external and Servo-only (e.g. `string_cache`). - Makes `enclosing_size_of_op` optional, because vanilla jemalloc doesn't support that operation. - For `HashSet`/`HashMap`, falls back to a computed estimate when `enclosing_size_of_op` isn't available. - Adds an extern "C" `malloc_size_of` function that does the actual heap measurement; this is based on the same functions from the `heapsize` crate. This patch makes the following changes elsewhere. - Converts all the uses of `heapsize` to instead use `malloc_size_of`. - Disables the "heapsize"/"heap_size" feature for the external crates that provide it. - Removes the `HeapSizeOf` implementation from `hashglobe`. - Adds `ignore` annotations to a few `Rc`/`Arc`, because `malloc_size_of` doesn't derive those types, unlike `heapsize`.
114 lines
4.6 KiB
Rust
114 lines
4.6 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
|
||
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
||
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
||
|
||
use cssparser::{Parser, ParserInput};
|
||
use dom::bindings::codegen::Bindings::CSSMediaRuleBinding;
|
||
use dom::bindings::codegen::Bindings::CSSMediaRuleBinding::CSSMediaRuleMethods;
|
||
use dom::bindings::codegen::Bindings::WindowBinding::WindowBinding::WindowMethods;
|
||
use dom::bindings::reflector::{DomObject, reflect_dom_object};
|
||
use dom::bindings::root::{DomRoot, MutNullableDom};
|
||
use dom::bindings::str::DOMString;
|
||
use dom::cssconditionrule::CSSConditionRule;
|
||
use dom::cssrule::SpecificCSSRule;
|
||
use dom::cssstylesheet::CSSStyleSheet;
|
||
use dom::medialist::MediaList;
|
||
use dom::window::Window;
|
||
use dom_struct::dom_struct;
|
||
use servo_arc::Arc;
|
||
use style::media_queries::parse_media_query_list;
|
||
use style::parser::ParserContext;
|
||
use style::shared_lock::{Locked, ToCssWithGuard};
|
||
use style::stylesheets::{CssRuleType, MediaRule};
|
||
use style_traits::{PARSING_MODE_DEFAULT, ToCss};
|
||
|
||
#[dom_struct]
|
||
pub struct CSSMediaRule {
|
||
cssconditionrule: CSSConditionRule,
|
||
#[ignore_malloc_size_of = "Arc"]
|
||
mediarule: Arc<Locked<MediaRule>>,
|
||
medialist: MutNullableDom<MediaList>,
|
||
}
|
||
|
||
impl CSSMediaRule {
|
||
fn new_inherited(parent_stylesheet: &CSSStyleSheet, mediarule: Arc<Locked<MediaRule>>)
|
||
-> CSSMediaRule {
|
||
let guard = parent_stylesheet.shared_lock().read();
|
||
let list = mediarule.read_with(&guard).rules.clone();
|
||
CSSMediaRule {
|
||
cssconditionrule: CSSConditionRule::new_inherited(parent_stylesheet, list),
|
||
mediarule: mediarule,
|
||
medialist: MutNullableDom::new(None),
|
||
}
|
||
}
|
||
|
||
#[allow(unrooted_must_root)]
|
||
pub fn new(window: &Window, parent_stylesheet: &CSSStyleSheet,
|
||
mediarule: Arc<Locked<MediaRule>>) -> DomRoot<CSSMediaRule> {
|
||
reflect_dom_object(Box::new(CSSMediaRule::new_inherited(parent_stylesheet, mediarule)),
|
||
window,
|
||
CSSMediaRuleBinding::Wrap)
|
||
}
|
||
|
||
fn medialist(&self) -> DomRoot<MediaList> {
|
||
self.medialist.or_init(|| {
|
||
let guard = self.cssconditionrule.shared_lock().read();
|
||
MediaList::new(self.global().as_window(),
|
||
self.cssconditionrule.parent_stylesheet(),
|
||
self.mediarule.read_with(&guard).media_queries.clone())
|
||
})
|
||
}
|
||
|
||
/// <https://drafts.csswg.org/css-conditional-3/#the-cssmediarule-interface>
|
||
pub fn get_condition_text(&self) -> DOMString {
|
||
let guard = self.cssconditionrule.shared_lock().read();
|
||
let rule = self.mediarule.read_with(&guard);
|
||
let list = rule.media_queries.read_with(&guard);
|
||
list.to_css_string().into()
|
||
}
|
||
|
||
/// <https://drafts.csswg.org/css-conditional-3/#the-cssmediarule-interface>
|
||
pub fn set_condition_text(&self, text: DOMString) {
|
||
let mut input = ParserInput::new(&text);
|
||
let mut input = Parser::new(&mut input);
|
||
let global = self.global();
|
||
let window = global.as_window();
|
||
let url = window.get_url();
|
||
let quirks_mode = window.Document().quirks_mode();
|
||
let context = ParserContext::new_for_cssom(&url, Some(CssRuleType::Media),
|
||
PARSING_MODE_DEFAULT,
|
||
quirks_mode);
|
||
|
||
let new_medialist = parse_media_query_list(&context, &mut input,
|
||
window.css_error_reporter());
|
||
let mut guard = self.cssconditionrule.shared_lock().write();
|
||
|
||
// Clone an Arc because we can’t borrow `guard` twice at the same time.
|
||
|
||
// FIXME(SimonSapin): allow access to multiple objects with one write guard?
|
||
// Would need a set of usize pointer addresses or something,
|
||
// the same object is not accessed more than once.
|
||
let mqs = Arc::clone(&self.mediarule.write_with(&mut guard).media_queries);
|
||
|
||
*mqs.write_with(&mut guard) = new_medialist;
|
||
}
|
||
}
|
||
|
||
impl SpecificCSSRule for CSSMediaRule {
|
||
fn ty(&self) -> u16 {
|
||
use dom::bindings::codegen::Bindings::CSSRuleBinding::CSSRuleConstants;
|
||
CSSRuleConstants::MEDIA_RULE
|
||
}
|
||
|
||
fn get_css(&self) -> DOMString {
|
||
let guard = self.cssconditionrule.shared_lock().read();
|
||
self.mediarule.read_with(&guard).to_css_string(&guard).into()
|
||
}
|
||
}
|
||
|
||
impl CSSMediaRuleMethods for CSSMediaRule {
|
||
// https://drafts.csswg.org/cssom/#dom-cssgroupingrule-media
|
||
fn Media(&self) -> DomRoot<MediaList> {
|
||
self.medialist()
|
||
}
|
||
}
|