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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
use crate::dom::bindings::cell::DomRefCell;
use crate::dom::bindings::codegen::Bindings::ShadowRootBinding::ShadowRootBinding::ShadowRootMethods;
use crate::dom::bindings::codegen::Bindings::ShadowRootBinding::{self, ShadowRootMode};
use crate::dom::bindings::inheritance::Castable;
use crate::dom::bindings::num::Finite;
use crate::dom::bindings::reflector::reflect_dom_object;
use crate::dom::bindings::root::{Dom, DomRoot, LayoutDom, MutNullableDom};
use crate::dom::cssstylesheet::CSSStyleSheet;
use crate::dom::document::Document;
use crate::dom::documentfragment::DocumentFragment;
use crate::dom::documentorshadowroot::{DocumentOrShadowRoot, StyleSheetInDocument};
use crate::dom::element::Element;
use crate::dom::node::{Node, NodeFlags};
use crate::dom::stylesheetlist::{StyleSheetList, StyleSheetListOwner};
use crate::dom::window::Window;
use dom_struct::dom_struct;
use servo_arc::Arc;
use style::author_styles::AuthorStyles;
use style::stylesheets::Stylesheet;
// https://dom.spec.whatwg.org/#interface-shadowroot
#[dom_struct]
pub struct ShadowRoot {
document_fragment: DocumentFragment,
document_or_shadow_root: DocumentOrShadowRoot,
document: Dom<Document>,
host: Dom<Element>,
/// List of stylesheets associated with nodes in this shadow tree.
/// |None| if the list needs to be refreshed.
author_styles: DomRefCell<AuthorStyles<StyleSheetInDocument>>,
stylesheet_list: MutNullableDom<StyleSheetList>,
window: Dom<Window>,
}
impl ShadowRoot {
#[allow(unrooted_must_root)]
fn new_inherited(host: &Element, document: &Document) -> ShadowRoot {
let document_fragment = DocumentFragment::new_inherited(document);
document_fragment
.upcast::<Node>()
.set_flag(NodeFlags::IS_IN_SHADOW_TREE, true);
ShadowRoot {
document_fragment,
document_or_shadow_root: DocumentOrShadowRoot::new(document.window()),
document: Dom::from_ref(document),
host: Dom::from_ref(host),
author_styles: DomRefCell::new(AuthorStyles::new()),
stylesheet_list: MutNullableDom::new(None),
window: Dom::from_ref(document.window()),
}
}
pub fn new(host: &Element, document: &Document) -> DomRoot<ShadowRoot> {
reflect_dom_object(
Box::new(ShadowRoot::new_inherited(host, document)),
document.window(),
ShadowRootBinding::Wrap,
)
}
pub fn get_focused_element(&self) -> Option<DomRoot<Element>> {
//XXX get retargeted focused element
None
}
}
impl ShadowRootMethods for ShadowRoot {
// https://html.spec.whatwg.org/multipage/#dom-document-activeelement
fn GetActiveElement(&self) -> Option<DomRoot<Element>> {
self.document_or_shadow_root
.get_active_element(self.get_focused_element(), None, None)
}
// https://drafts.csswg.org/cssom-view/#dom-document-elementfrompoint
fn ElementFromPoint(&self, x: Finite<f64>, y: Finite<f64>) -> Option<DomRoot<Element>> {
// XXX return the result of running the retargeting algorithm with context object
// and the original result as input
self.document_or_shadow_root.element_from_point(
x,
y,
None,
self.document.has_browsing_context(),
)
}
// https://drafts.csswg.org/cssom-view/#dom-document-elementsfrompoint
fn ElementsFromPoint(&self, x: Finite<f64>, y: Finite<f64>) -> Vec<DomRoot<Element>> {
// XXX return the result of running the retargeting algorithm with context object
// and the original result as input
self.document_or_shadow_root.elements_from_point(
x,
y,
None,
self.document.has_browsing_context(),
)
}
/// https://dom.spec.whatwg.org/#dom-shadowroot-mode
fn Mode(&self) -> ShadowRootMode {
ShadowRootMode::Closed
}
/// https://dom.spec.whatwg.org/#dom-shadowroot-host
fn Host(&self) -> DomRoot<Element> {
DomRoot::from_ref(&self.host)
}
// https://drafts.csswg.org/cssom/#dom-document-stylesheets
fn StyleSheets(&self) -> DomRoot<StyleSheetList> {
self.stylesheet_list
.or_init(|| StyleSheetList::new(&self.window, Box::new(Dom::from_ref(self))))
}
}
#[allow(unsafe_code)]
pub trait LayoutShadowRootHelpers {
unsafe fn get_host_for_layout(&self) -> LayoutDom<Element>;
}
impl LayoutShadowRootHelpers for LayoutDom<ShadowRoot> {
#[inline]
#[allow(unsafe_code)]
unsafe fn get_host_for_layout(&self) -> LayoutDom<Element> {
(*self.unsafe_get()).host.to_layout()
}
}
impl StyleSheetListOwner for Dom<ShadowRoot> {
fn stylesheet_count(&self) -> usize {
self.author_styles.borrow().stylesheets.len()
}
fn stylesheet_at(&self, index: usize) -> Option<DomRoot<CSSStyleSheet>> {
let stylesheets = &self.author_styles.borrow().stylesheets;
stylesheets
.get(index)
.and_then(|s| s.owner.upcast::<Node>().get_cssom_stylesheet())
}
/// Add a stylesheet owned by `owner` to the list of shadow root sheets, in the
/// correct tree position.
#[allow(unrooted_must_root)] // Owner needs to be rooted already necessarily.
fn add_stylesheet(&self, owner: &Element, sheet: Arc<Stylesheet>) {
let stylesheets = &mut self.author_styles.borrow_mut().stylesheets;
let insertion_point = stylesheets
.iter()
.find(|sheet_in_shadow| {
owner
.upcast::<Node>()
.is_before(sheet_in_shadow.owner.upcast())
})
.cloned();
self.document_or_shadow_root.add_stylesheet(
owner,
stylesheets,
sheet,
insertion_point,
self.document.style_shared_lock(),
);
}
/// Remove a stylesheet owned by `owner` from the list of shadow root sheets.
#[allow(unrooted_must_root)] // Owner needs to be rooted already necessarily.
fn remove_stylesheet(&self, owner: &Element, s: &Arc<Stylesheet>) {
self.document_or_shadow_root.remove_stylesheet(
owner,
s,
&mut self.author_styles.borrow_mut().stylesheets,
)
}
}
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