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Implement declarative shadow dom (#34964)
* Implement declarative shadow dom Signed-off-by: batu_hoang <longvatrong111@gmail.com> * Set allowDeclarativeShadowRoots false for innerHTML Signed-off-by: batu_hoang <longvatrong111@gmail.com> * Enable allowDeclarativeShadowRoots for Document Signed-off-by: batu_hoang <longvatrong111@gmail.com> * Expose HTMLTemplateElement to js Signed-off-by: batu_hoang <longvatrong111@gmail.com> * Implemenet setHTMLUnsafe and add more test cases Signed-off-by: batu_hoang <longvatrong111@gmail.com> * Declarative shadow dom: minor updates and expected test result update Signed-off-by: batu_hoang <longvatrong111@gmail.com> * Shadow-dom: add more test cases Signed-off-by: batu_hoang <longvatrong111@gmail.com> * Update comments according to the spec Signed-off-by: batu_hoang <longvatrong111@gmail.com> * Bump html5ever version Signed-off-by: batu_hoang <longvatrong111@gmail.com> --------- Signed-off-by: batu_hoang <longvatrong111@gmail.com>
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batu_hoang
GitHub
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44 changed files with 360 additions and 1965 deletions
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@ -44,6 +44,9 @@ use crate::dom::bindings::codegen::Bindings::DocumentBinding::{
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use crate::dom::bindings::codegen::Bindings::HTMLImageElementBinding::HTMLImageElementMethods;
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use crate::dom::bindings::codegen::Bindings::HTMLTemplateElementBinding::HTMLTemplateElementMethods;
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use crate::dom::bindings::codegen::Bindings::NodeBinding::NodeMethods;
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use crate::dom::bindings::codegen::Bindings::ShadowRootBinding::{
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ShadowRootMode, SlotAssignmentMode,
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};
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use crate::dom::bindings::inheritance::Castable;
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use crate::dom::bindings::refcounted::Trusted;
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use crate::dom::bindings::reflector::{DomGlobal, Reflector, reflect_dom_object};
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@ -53,6 +56,7 @@ use crate::dom::bindings::str::{DOMString, USVString};
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use crate::dom::characterdata::CharacterData;
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use crate::dom::comment::Comment;
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use crate::dom::document::{Document, DocumentSource, HasBrowsingContext, IsHTMLDocument};
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use crate::dom::documentfragment::DocumentFragment;
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use crate::dom::documenttype::DocumentType;
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use crate::dom::element::{CustomElementCreationMode, Element, ElementCreator};
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use crate::dom::htmlformelement::{FormControlElementHelpers, HTMLFormElement};
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@ -64,6 +68,7 @@ use crate::dom::node::{Node, ShadowIncluding};
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use crate::dom::performanceentry::PerformanceEntry;
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use crate::dom::performancenavigationtiming::PerformanceNavigationTiming;
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use crate::dom::processinginstruction::ProcessingInstruction;
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use crate::dom::shadowroot::IsUserAgentWidget;
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use crate::dom::text::Text;
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use crate::dom::virtualmethods::vtable_for;
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use crate::network_listener::PreInvoke;
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@ -191,6 +196,7 @@ impl ServoParser {
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pub(crate) fn parse_html_fragment(
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context: &Element,
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input: DOMString,
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allow_declarative_shadow_roots: bool,
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can_gc: CanGc,
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) -> impl Iterator<Item = DomRoot<Node>> + use<'_> {
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let context_node = context.upcast::<Node>();
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@ -218,6 +224,7 @@ impl ServoParser {
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None,
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Default::default(),
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false,
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allow_declarative_shadow_roots,
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Some(context_document.insecure_requests_policy()),
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can_gc,
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);
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@ -1184,18 +1191,23 @@ impl TreeSink for Sink {
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&self,
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name: QualName,
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attrs: Vec<Attribute>,
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_flags: ElementFlags,
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flags: ElementFlags,
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) -> Dom<Node> {
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let attrs = attrs
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.into_iter()
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.map(|attr| ElementAttribute::new(attr.name, DOMString::from(String::from(attr.value))))
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.collect();
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let parsing_algorithm = if flags.template {
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ParsingAlgorithm::Fragment
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} else {
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self.parsing_algorithm
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};
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let element = create_element_for_token(
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name,
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attrs,
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&self.document,
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ElementCreator::ParserCreated(self.current_line.get()),
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self.parsing_algorithm,
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parsing_algorithm,
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CanGc::note(),
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);
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Dom::from_ref(element.upcast())
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@ -1381,6 +1393,91 @@ impl TreeSink for Sink {
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let node = DomRoot::from_ref(&**node);
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vtable_for(&node).pop();
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}
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fn allow_declarative_shadow_roots(&self, intended_parent: &Dom<Node>) -> bool {
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intended_parent.owner_doc().allow_declarative_shadow_roots()
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}
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/// <https://html.spec.whatwg.org/multipage/#parsing-main-inhead>
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/// A start tag whose tag name is "template"
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/// Attach shadow path
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fn attach_declarative_shadow(
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&self,
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host: &Dom<Node>,
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template: &Dom<Node>,
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attrs: Vec<Attribute>,
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) -> Result<(), String> {
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let host_element = host.downcast::<Element>().unwrap();
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if host_element.shadow_root().is_some() {
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return Err(String::from("Already in a shadow host"));
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}
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let template_element = template.downcast::<HTMLTemplateElement>().unwrap();
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// Step 3. Let mode be template start tag's shadowrootmode attribute's value.
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// Step 4. Let clonable be true if template start tag has a shadowrootclonable attribute; otherwise false.
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// Step 5. Let delegatesfocus be true if template start tag
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// has a shadowrootdelegatesfocus attribute; otherwise false.
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// Step 6. Let serializable be true if template start tag
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// has a shadowrootserializable attribute; otherwise false.
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let mut shadow_root_mode = ShadowRootMode::Open;
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let mut clonable = false;
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let mut _delegatesfocus = false;
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let mut _serializable = false;
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let attrs: Vec<ElementAttribute> = attrs
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.clone()
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.into_iter()
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.map(|attr| ElementAttribute::new(attr.name, DOMString::from(String::from(attr.value))))
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.collect();
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attrs
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.iter()
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.for_each(|attr: &ElementAttribute| match attr.name.local {
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local_name!("shadowrootmode") => {
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if attr.value.str().eq_ignore_ascii_case("open") {
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shadow_root_mode = ShadowRootMode::Open;
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} else if attr.value.str().eq_ignore_ascii_case("closed") {
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shadow_root_mode = ShadowRootMode::Closed;
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} else {
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unreachable!("shadowrootmode value is not open nor closed");
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}
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},
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local_name!("shadowrootclonable") => {
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clonable = true;
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},
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local_name!("shadowrootdelegatesfocus") => {
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_delegatesfocus = true;
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},
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local_name!("shadowrootserializable") => {
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_serializable = true;
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},
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_ => {},
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});
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// Step 8.1. Attach a shadow root with declarative shadow host element,
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// mode, clonable, serializable, delegatesFocus, and "named".
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match host_element.attach_shadow(
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IsUserAgentWidget::No,
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shadow_root_mode,
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clonable,
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SlotAssignmentMode::Manual,
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CanGc::note(),
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) {
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Ok(shadow_root) => {
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// Step 8.3. Set shadow's declarative to true.
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shadow_root.set_declarative(true);
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// Set 8.4. Set template's template contents property to shadow.
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let shadow = shadow_root.upcast::<DocumentFragment>();
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template_element.set_contents(Some(shadow));
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Ok(())
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},
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Err(_) => Err(String::from("Attaching shadow fails")),
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}
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}
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}
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/// <https://html.spec.whatwg.org/multipage/#create-an-element-for-the-token>
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