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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`.
118 lines
3.9 KiB
Rust
118 lines
3.9 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 dom::bindings::codegen::Bindings::CSSStyleSheetBinding;
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use dom::bindings::codegen::Bindings::CSSStyleSheetBinding::CSSStyleSheetMethods;
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use dom::bindings::codegen::Bindings::WindowBinding::WindowBinding::WindowMethods;
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use dom::bindings::error::{Error, ErrorResult, Fallible};
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use dom::bindings::reflector::{reflect_dom_object, DomObject};
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use dom::bindings::root::{Dom, DomRoot, MutNullableDom};
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use dom::bindings::str::DOMString;
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use dom::cssrulelist::{CSSRuleList, RulesSource};
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use dom::element::Element;
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use dom::stylesheet::StyleSheet;
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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 std::cell::Cell;
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use style::shared_lock::SharedRwLock;
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use style::stylesheets::Stylesheet as StyleStyleSheet;
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#[dom_struct]
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pub struct CSSStyleSheet {
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stylesheet: StyleSheet,
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owner: Dom<Element>,
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rulelist: MutNullableDom<CSSRuleList>,
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#[ignore_malloc_size_of = "Arc"]
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style_stylesheet: Arc<StyleStyleSheet>,
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origin_clean: Cell<bool>,
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}
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impl CSSStyleSheet {
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fn new_inherited(owner: &Element,
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type_: DOMString,
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href: Option<DOMString>,
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title: Option<DOMString>,
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stylesheet: Arc<StyleStyleSheet>) -> CSSStyleSheet {
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CSSStyleSheet {
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stylesheet: StyleSheet::new_inherited(type_, href, title),
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owner: Dom::from_ref(owner),
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rulelist: MutNullableDom::new(None),
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style_stylesheet: stylesheet,
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origin_clean: Cell::new(true),
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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,
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owner: &Element,
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type_: DOMString,
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href: Option<DOMString>,
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title: Option<DOMString>,
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stylesheet: Arc<StyleStyleSheet>) -> DomRoot<CSSStyleSheet> {
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reflect_dom_object(Box::new(CSSStyleSheet::new_inherited(owner, type_, href, title, stylesheet)),
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window,
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CSSStyleSheetBinding::Wrap)
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}
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fn rulelist(&self) -> DomRoot<CSSRuleList> {
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self.rulelist.or_init(|| {
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let rules = self.style_stylesheet.contents.rules.clone();
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CSSRuleList::new(
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self.global().as_window(),
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self,
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RulesSource::Rules(rules)
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)
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})
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}
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pub fn disabled(&self) -> bool {
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self.style_stylesheet.disabled()
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}
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pub fn set_disabled(&self, disabled: bool) {
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if self.style_stylesheet.set_disabled(disabled) {
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self.global().as_window().Document().invalidate_stylesheets();
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}
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}
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pub fn shared_lock(&self) -> &SharedRwLock {
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&self.style_stylesheet.shared_lock
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}
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pub fn style_stylesheet(&self) -> &StyleStyleSheet {
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&self.style_stylesheet
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}
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pub fn set_origin_clean(&self, origin_clean: bool) {
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self.origin_clean.set(origin_clean);
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}
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}
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impl CSSStyleSheetMethods for CSSStyleSheet {
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// https://drafts.csswg.org/cssom/#dom-cssstylesheet-cssrules
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fn GetCssRules(&self) -> Fallible<DomRoot<CSSRuleList>> {
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if !self.origin_clean.get() {
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return Err(Error::Security);
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}
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Ok(self.rulelist())
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}
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// https://drafts.csswg.org/cssom/#dom-cssstylesheet-insertrule
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fn InsertRule(&self, rule: DOMString, index: u32) -> Fallible<u32> {
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if !self.origin_clean.get() {
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return Err(Error::Security);
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}
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self.rulelist().insert_rule(&rule, index, /* nested */ false)
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}
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// https://drafts.csswg.org/cssom/#dom-cssstylesheet-deleterule
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fn DeleteRule(&self, index: u32) -> ErrorResult {
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if !self.origin_clean.get() {
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return Err(Error::Security);
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}
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self.rulelist().remove_rule(index)
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}
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}
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