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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 std::cell::Cell;
use dom_struct::dom_struct;
use js::rust::HandleObject;
use super::bindings::codegen::Bindings::IntersectionObserverEntryBinding::{
IntersectionObserverEntryInit, IntersectionObserverEntryMethods,
};
use super::bindings::num::Finite;
use crate::dom::bindings::codegen::Bindings::DOMRectReadOnlyBinding::DOMRectInit;
use crate::dom::bindings::reflector::{Reflector, reflect_dom_object_with_proto};
use crate::dom::bindings::root::{Dom, DomRoot};
use crate::dom::domrectreadonly::DOMRectReadOnly;
use crate::dom::element::Element;
use crate::dom::window::Window;
use crate::script_runtime::CanGc;
/// An individual IntersectionObserver entry.
///
/// <https://w3c.github.io/IntersectionObserver/#intersection-observer-entry>
#[dom_struct]
pub(crate) struct IntersectionObserverEntry {
reflector_: Reflector,
// <https://w3c.github.io/IntersectionObserver/#dom-intersectionobserverentry-time>
time: Cell<Finite<f64>>,
// <https://w3c.github.io/IntersectionObserver/#dom-intersectionobserverentry-rootbounds>
root_bounds: Option<Dom<DOMRectReadOnly>>,
// <https://w3c.github.io/IntersectionObserver/#dom-intersectionobserverentry-boundingclientrect>
bounding_client_rect: Dom<DOMRectReadOnly>,
// <https://w3c.github.io/IntersectionObserver/#dom-intersectionobserverentry-intersectionrect>
intersection_rect: Dom<DOMRectReadOnly>,
// <https://w3c.github.io/IntersectionObserver/#dom-intersectionobserverentry-isintersecting>
is_intersecting: Cell<bool>,
// <https://w3c.github.io/IntersectionObserver/#dom-intersectionobserverentry-isvisible>
is_visible: Cell<bool>,
// <https://w3c.github.io/IntersectionObserver/#dom-intersectionobserverentry-intersectionratio>
intersection_ratio: Cell<Finite<f64>>,
// <https://w3c.github.io/IntersectionObserver/#dom-intersectionobserverentry-target>
target: Dom<Element>,
}
impl IntersectionObserverEntry {
#[allow(clippy::too_many_arguments)]
fn new_inherited(
time: Finite<f64>,
root_bounds: Option<&DOMRectReadOnly>,
bounding_client_rect: &DOMRectReadOnly,
intersection_rect: &DOMRectReadOnly,
is_intersecting: bool,
is_visible: bool,
intersection_ratio: Finite<f64>,
target: &Element,
) -> Self {
Self {
reflector_: Reflector::new(),
target: Dom::from_ref(target),
time: Cell::new(time),
root_bounds: root_bounds.map(Dom::from_ref),
bounding_client_rect: Dom::from_ref(bounding_client_rect),
intersection_rect: Dom::from_ref(intersection_rect),
is_intersecting: Cell::new(is_intersecting),
is_visible: Cell::new(is_visible),
intersection_ratio: Cell::new(intersection_ratio),
}
}
#[allow(clippy::too_many_arguments)]
pub(crate) fn new(
window: &Window,
proto: Option<HandleObject>,
time: Finite<f64>,
root_bounds: Option<&DOMRectReadOnly>,
bounding_client_rect: &DOMRectReadOnly,
intersection_rect: &DOMRectReadOnly,
is_intersecting: bool,
is_visible: bool,
intersection_ratio: Finite<f64>,
target: &Element,
can_gc: CanGc,
) -> DomRoot<Self> {
let observer = Box::new(Self::new_inherited(
time,
root_bounds,
bounding_client_rect,
intersection_rect,
is_intersecting,
is_visible,
intersection_ratio,
target,
));
reflect_dom_object_with_proto(observer, window, proto, can_gc)
}
fn new_from_dictionary(
window: &Window,
proto: Option<HandleObject>,
init: &IntersectionObserverEntryInit,
can_gc: CanGc,
) -> DomRoot<Self> {
let domrectreadonly_from_dictionary = |dictionary: &DOMRectInit| {
DOMRectReadOnly::new_from_dictionary(
window.as_global_scope(),
proto,
dictionary,
can_gc,
)
};
let observer = Box::new(Self::new_inherited(
init.time,
Some(&*domrectreadonly_from_dictionary(&init.rootBounds)),
&domrectreadonly_from_dictionary(&init.boundingClientRect),
&domrectreadonly_from_dictionary(&init.intersectionRect),
init.isIntersecting,
init.isVisible,
init.intersectionRatio,
&init.target,
));
reflect_dom_object_with_proto(observer, window, proto, can_gc)
}
}
impl IntersectionObserverEntryMethods<crate::DomTypeHolder> for IntersectionObserverEntry {
/// > The attribute must return a DOMHighResTimeStamp that corresponds to the time the
/// > intersection was recorded, relative to the time origin of the global object
/// > associated with the IntersectionObserver instance that generated the notification.
///
/// <https://w3c.github.io/IntersectionObserver/#dom-intersectionobserverentry-time>
fn Time(&self) -> Finite<f64> {
self.time.get()
}
/// > For a same-origin-domain target, this will be the root intersection rectangle.
/// > Otherwise, this will be null. Note that if the target is in a different browsing
/// > context than the intersection root, this will be in a different coordinate system
/// > than boundingClientRect and intersectionRect.
///
/// <https://w3c.github.io/IntersectionObserver/#dom-intersectionobserverentry-rootbounds>
fn GetRootBounds(&self) -> Option<DomRoot<DOMRectReadOnly>> {
self.root_bounds.as_ref().map(|rect| rect.as_rooted())
}
/// > A DOMRectReadOnly obtained by getting the bounding box for target.
///
/// <https://w3c.github.io/IntersectionObserver/#dom-intersectionobserverentry-boundingclientrect>
fn BoundingClientRect(&self) -> DomRoot<DOMRectReadOnly> {
self.bounding_client_rect.as_rooted()
}
/// > boundingClientRect, intersected by each of target's ancestors' clip rects (up to
/// > but not including root), intersected with the root intersection rectangle. This
/// > value represents the portion of target that intersects with the root intersection
/// > rectangle.
///
/// <https://w3c.github.io/IntersectionObserver/#dom-intersectionobserverentry-intersectionrect>
fn IntersectionRect(&self) -> DomRoot<DOMRectReadOnly> {
self.intersection_rect.as_rooted()
}
/// > True if the target intersects with the root; false otherwise. This flag makes it
/// > possible to distinguish between an IntersectionObserverEntry signalling the
/// > transition from intersecting to not-intersecting; and an IntersectionObserverEntry
/// > signalling a transition from not-intersecting to intersecting with a zero-area
/// > intersection rect (as will happen with edge-adjacent intersections, or when the
/// > boundingClientRect has zero area).
///
/// <https://w3c.github.io/IntersectionObserver/#dom-intersectionobserverentry-isintersecting>
fn IsIntersecting(&self) -> bool {
self.is_intersecting.get()
}
/// > Contains the result of running the visibility algorithm on target.
///
/// <https://w3c.github.io/IntersectionObserver/#dom-intersectionobserverentry-isvisible>
fn IsVisible(&self) -> bool {
self.is_visible.get()
}
/// > If the boundingClientRect has non-zero area, this will be the ratio of
/// > intersectionRect area to boundingClientRect area. Otherwise, this will be 1 if the
/// > isIntersecting is true, and 0 if not.
///
/// <https://w3c.github.io/IntersectionObserver/#dom-intersectionobserverentry-intersectionratio>
fn IntersectionRatio(&self) -> Finite<f64> {
self.intersection_ratio.get()
}
/// > The Element whose intersection with the intersection root changed.
///
/// <https://w3c.github.io/IntersectionObserver/#dom-intersectionobserverentry-target>
fn Target(&self) -> DomRoot<Element> {
self.target.as_rooted()
}
/// <https://w3c.github.io/IntersectionObserver/#dom-intersectionobserverentry-intersectionobserverentry>
fn Constructor(
window: &Window,
proto: Option<HandleObject>,
can_gc: CanGc,
init: &IntersectionObserverEntryInit,
) -> DomRoot<IntersectionObserverEntry> {
Self::new_from_dictionary(window, proto, init, can_gc)
}
}
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