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Introduce <LayoutDom<Element>>::attrs()

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This safe method is the basic block to access element attributes from layout.
We reuse it in the other attr-related layout methods to remove a pretty big
source of rampant unsafe code between script and layout.
This commit is contained in:
Anthony Ramine 2020-03-31 18:46:49 +02:00
parent 0bda174823
commit 5ff931d171
16 changed files with 203 additions and 301 deletions
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62
components/layout_thread/dom_wrapper.rs
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@ -489,11 +489,9 @@ impl<'le> TElement for ServoLayoutElement<'le> {
where
F: FnMut(&Atom),
{
unsafe {
if let Some(ref classes) = self.element.get_classes_for_layout() {
for class in *classes {
callback(class)
}
if let Some(ref classes) = self.element.get_classes_for_layout() {
for class in *classes {
callback(class)
}
}
}
@ -698,12 +696,12 @@ impl<'le> ServoLayoutElement<'le> {
#[inline]
fn get_attr_enum(&self, namespace: &Namespace, name: &LocalName) -> Option<&AttrValue> {
unsafe { self.element.get_attr_for_layout(namespace, name) }
self.element.get_attr_for_layout(namespace, name)
}
#[inline]
fn get_attr(&self, namespace: &Namespace, name: &LocalName) -> Option<&str> {
unsafe { self.element.get_attr_val_for_layout(namespace, name) }
self.element.get_attr_val_for_layout(namespace, name)
}
fn get_style_data(&self) -> Option<&StyleData> {
@ -805,10 +803,11 @@ impl<'le> ::selectors::Element for ServoLayoutElement<'le> {
NamespaceConstraint::Specific(ref ns) => self
.get_attr_enum(ns, local_name)
.map_or(false, |value| value.eval_selector(operation)),
NamespaceConstraint::Any => {
let values = unsafe { self.element.get_attr_vals_for_layout(local_name) };
values.iter().any(|value| value.eval_selector(operation))
},
NamespaceConstraint::Any => self
.element
.get_attr_vals_for_layout(local_name)
.iter()
.any(|value| value.eval_selector(operation)),
}
}
@ -878,7 +877,7 @@ impl<'le> ::selectors::Element for ServoLayoutElement<'le> {
NonTSPseudoClass::Lang(ref lang) => self.match_element_lang(None, &*lang),
NonTSPseudoClass::ServoNonZeroBorder => unsafe {
NonTSPseudoClass::ServoNonZeroBorder => {
match self
.element
.get_attr_for_layout(&ns!(), &local_name!("border"))
@ -912,23 +911,18 @@ impl<'le> ::selectors::Element for ServoLayoutElement<'le> {
#[inline]
fn is_link(&self) -> bool {
unsafe {
match self.as_node().script_type_id() {
// https://html.spec.whatwg.org/multipage/#selector-link
NodeTypeId::Element(ElementTypeId::HTMLElement(
HTMLElementTypeId::HTMLAnchorElement,
)) |
NodeTypeId::Element(ElementTypeId::HTMLElement(
HTMLElementTypeId::HTMLAreaElement,
)) |
NodeTypeId::Element(ElementTypeId::HTMLElement(
HTMLElementTypeId::HTMLLinkElement,
)) => self
.element
match self.as_node().script_type_id() {
// https://html.spec.whatwg.org/multipage/#selector-link
NodeTypeId::Element(ElementTypeId::HTMLElement(
HTMLElementTypeId::HTMLAnchorElement,
)) |
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLAreaElement)) |
NodeTypeId::Element(ElementTypeId::HTMLElement(HTMLElementTypeId::HTMLLinkElement)) => {
self.element
.get_attr_val_for_layout(&ns!(), &local_name!("href"))
.is_some(),
_ => false,
}
.is_some()
},
_ => false,
}
}
@ -956,7 +950,7 @@ impl<'le> ::selectors::Element for ServoLayoutElement<'le> {
#[inline]
fn has_class(&self, name: &Atom, case_sensitivity: CaseSensitivity) -> bool {
unsafe { self.element.has_class_for_layout(name, case_sensitivity) }
self.element.has_class_for_layout(name, case_sensitivity)
}
fn is_html_slot_element(&self) -> bool {
@ -1439,10 +1433,12 @@ impl<'le> ::selectors::Element for ServoThreadSafeLayoutElement<'le> {
NamespaceConstraint::Specific(ref ns) => self
.get_attr_enum(ns, local_name)
.map_or(false, |value| value.eval_selector(operation)),
NamespaceConstraint::Any => {
let values = unsafe { self.element.element.get_attr_vals_for_layout(local_name) };
values.iter().any(|v| v.eval_selector(operation))
},
NamespaceConstraint::Any => self
.element
.element
.get_attr_vals_for_layout(local_name)
.iter()
.any(|v| v.eval_selector(operation)),
}
}