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https://github.com/servo/servo.git
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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`.
88 lines
3.6 KiB
Rust
88 lines
3.6 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use cssparser::{Parser, ParserInput};
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use dom::bindings::codegen::Bindings::CSSSupportsRuleBinding;
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use dom::bindings::codegen::Bindings::WindowBinding::WindowBinding::WindowMethods;
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use dom::bindings::reflector::{DomObject, reflect_dom_object};
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use dom::bindings::root::DomRoot;
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use dom::bindings::str::DOMString;
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use dom::cssconditionrule::CSSConditionRule;
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use dom::cssrule::SpecificCSSRule;
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use dom::cssstylesheet::CSSStyleSheet;
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use dom::window::Window;
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use dom_struct::dom_struct;
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use servo_arc::Arc;
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use style::parser::ParserContext;
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use style::shared_lock::{Locked, ToCssWithGuard};
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use style::stylesheets::{CssRuleType, SupportsRule};
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use style::stylesheets::supports_rule::SupportsCondition;
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use style_traits::{PARSING_MODE_DEFAULT, ToCss};
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#[dom_struct]
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pub struct CSSSupportsRule {
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cssconditionrule: CSSConditionRule,
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#[ignore_malloc_size_of = "Arc"]
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supportsrule: Arc<Locked<SupportsRule>>,
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}
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impl CSSSupportsRule {
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fn new_inherited(parent_stylesheet: &CSSStyleSheet, supportsrule: Arc<Locked<SupportsRule>>)
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-> CSSSupportsRule {
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let guard = parent_stylesheet.shared_lock().read();
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let list = supportsrule.read_with(&guard).rules.clone();
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CSSSupportsRule {
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cssconditionrule: CSSConditionRule::new_inherited(parent_stylesheet, list),
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supportsrule: supportsrule,
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}
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}
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#[allow(unrooted_must_root)]
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pub fn new(window: &Window, parent_stylesheet: &CSSStyleSheet,
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supportsrule: Arc<Locked<SupportsRule>>) -> DomRoot<CSSSupportsRule> {
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reflect_dom_object(Box::new(CSSSupportsRule::new_inherited(parent_stylesheet, supportsrule)),
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window,
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CSSSupportsRuleBinding::Wrap)
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}
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/// <https://drafts.csswg.org/css-conditional-3/#the-csssupportsrule-interface>
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pub fn get_condition_text(&self) -> DOMString {
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let guard = self.cssconditionrule.shared_lock().read();
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let rule = self.supportsrule.read_with(&guard);
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rule.condition.to_css_string().into()
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}
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/// <https://drafts.csswg.org/css-conditional-3/#the-csssupportsrule-interface>
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pub fn set_condition_text(&self, text: DOMString) {
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let mut input = ParserInput::new(&text);
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let mut input = Parser::new(&mut input);
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let cond = SupportsCondition::parse(&mut input);
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if let Ok(cond) = cond {
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let global = self.global();
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let win = global.as_window();
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let url = win.Document().url();
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let quirks_mode = win.Document().quirks_mode();
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let context = ParserContext::new_for_cssom(&url, Some(CssRuleType::Supports),
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PARSING_MODE_DEFAULT,
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quirks_mode);
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let enabled = cond.eval(&context);
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let mut guard = self.cssconditionrule.shared_lock().write();
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let rule = self.supportsrule.write_with(&mut guard);
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rule.condition = cond;
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rule.enabled = enabled;
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}
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}
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}
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impl SpecificCSSRule for CSSSupportsRule {
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fn ty(&self) -> u16 {
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use dom::bindings::codegen::Bindings::CSSRuleBinding::CSSRuleConstants;
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CSSRuleConstants::SUPPORTS_RULE
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}
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fn get_css(&self) -> DOMString {
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let guard = self.cssconditionrule.shared_lock().read();
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self.supportsrule.read_with(&guard).to_css_string(&guard).into()
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}
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}
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