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https://github.com/servo/servo.git
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30abb99287
This change: 1. Adds safety documentation where it was missing. 2. Limits the scope of unsafe code in some cases to where it is actually unsafe. 3. Converts some free functions to associated functions and methods, thereby making them more likely to be called safely. Signed-off-by: Martin Robinson <mrobinson@igalia.com>
65 lines
2 KiB
Rust
65 lines
2 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 https://mozilla.org/MPL/2.0/. */
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use std::fmt;
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use style::dom::TShadowRoot;
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use style::shared_lock::SharedRwLockReadGuard as StyleSharedRwLockReadGuard;
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use style::stylist::{CascadeData, Stylist};
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use crate::dom::bindings::root::LayoutDom;
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use crate::dom::shadowroot::{LayoutShadowRootHelpers, ShadowRoot};
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use crate::layout_dom::{ServoLayoutElement, ServoLayoutNode};
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#[derive(Clone, Copy, PartialEq)]
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pub struct ServoShadowRoot<'dom> {
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/// The wrapped private DOM ShadowRoot.
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shadow_root: LayoutDom<'dom, ShadowRoot>,
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}
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impl<'dom> fmt::Debug for ServoShadowRoot<'dom> {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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self.as_node().fmt(f)
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}
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}
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impl<'dom> TShadowRoot for ServoShadowRoot<'dom> {
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type ConcreteNode = ServoLayoutNode<'dom>;
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fn as_node(&self) -> Self::ConcreteNode {
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ServoLayoutNode::from_layout_js(self.shadow_root.upcast())
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}
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fn host(&self) -> ServoLayoutElement<'dom> {
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ServoLayoutElement::from_layout_js(self.shadow_root.get_host_for_layout())
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}
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fn style_data<'a>(&self) -> Option<&'a CascadeData>
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where
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Self: 'a,
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{
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Some(self.shadow_root.get_style_data_for_layout())
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}
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}
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impl<'dom> ServoShadowRoot<'dom> {
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pub(super) fn from_layout_js(shadow_root: LayoutDom<'dom, ShadowRoot>) -> Self {
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ServoShadowRoot { shadow_root }
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}
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/// Flush the stylesheets for the underlying shadow root.
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///
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/// # Safety
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///
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/// This modifies a DOM object, so should care should be taken that only one
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/// thread has a reference to this object.
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pub unsafe fn flush_stylesheets(
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&self,
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stylist: &mut Stylist,
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guard: &StyleSharedRwLockReadGuard,
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) {
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self.shadow_root
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.flush_stylesheets::<ServoLayoutElement>(stylist, guard)
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}
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}
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