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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::f64::consts::PI;
use dom_struct::dom_struct;
use euclid::Point2D;
use crate::dom::bindings::codegen::Bindings::TouchBinding::TouchMethods;
use crate::dom::bindings::num::Finite;
use crate::dom::bindings::reflector::{Reflector, reflect_dom_object};
use crate::dom::bindings::root::{DomRoot, MutDom};
use crate::dom::event::{EventBubbles, EventCancelable};
use crate::dom::eventtarget::EventTarget;
use crate::dom::pointerevent::PointerEvent;
use crate::dom::window::Window;
use crate::script_runtime::CanGc;
#[dom_struct]
pub(crate) struct Touch {
reflector_: Reflector,
identifier: i32,
target: MutDom<EventTarget>,
screen_x: f64,
screen_y: f64,
client_x: f64,
client_y: f64,
page_x: f64,
page_y: f64,
}
impl Touch {
#[allow(clippy::too_many_arguments)]
fn new_inherited(
identifier: i32,
target: &EventTarget,
screen_x: Finite<f64>,
screen_y: Finite<f64>,
client_x: Finite<f64>,
client_y: Finite<f64>,
page_x: Finite<f64>,
page_y: Finite<f64>,
) -> Touch {
Touch {
reflector_: Reflector::new(),
identifier,
target: MutDom::new(target),
screen_x: *screen_x,
screen_y: *screen_y,
client_x: *client_x,
client_y: *client_y,
page_x: *page_x,
page_y: *page_y,
}
}
#[allow(clippy::too_many_arguments)]
pub(crate) fn new(
window: &Window,
identifier: i32,
target: &EventTarget,
screen_x: Finite<f64>,
screen_y: Finite<f64>,
client_x: Finite<f64>,
client_y: Finite<f64>,
page_x: Finite<f64>,
page_y: Finite<f64>,
can_gc: CanGc,
) -> DomRoot<Touch> {
reflect_dom_object(
Box::new(Touch::new_inherited(
identifier, target, screen_x, screen_y, client_x, client_y, page_x, page_y,
)),
window,
can_gc,
)
}
/// Create a PointerEvent from this Touch.
/// <https://w3c.github.io/pointerevents/#the-primary-pointer>
#[allow(clippy::too_many_arguments)]
pub(crate) fn to_pointer_event(
&self,
window: &Window,
event_type: &str,
pointer_id: i32,
is_primary: bool,
modifiers: keyboard_types::Modifiers,
is_cancelable: bool,
point_in_node: Option<euclid::Point2D<f32, style_traits::CSSPixel>>,
can_gc: CanGc,
) -> DomRoot<PointerEvent> {
// Pressure is 0.5 for active touches, 0.0 for up/cancel/out/leave
// <https://w3c.github.io/pointerevents/#dom-pointerevent-pressure>
// TODO: add proper force support.
let pressure = if event_type == "pointerup" ||
event_type == "pointercancel" ||
event_type == "pointerout" ||
event_type == "pointerleave"
{
0.0
} else {
0.5
};
// <https://w3c.github.io/pointerevents/#the-button-property>
// For pointermove, pointerover, pointerenter, pointerout, pointerleave: button is -1
// For pointerdown, pointerup, pointercancel: button is 0 (primary button)
let button = if event_type == "pointermove" ||
event_type == "pointerover" ||
event_type == "pointerenter" ||
event_type == "pointerout" ||
event_type == "pointerleave"
{
-1
} else {
0
};
// Buttons: 1 if a button is pressed during the event, 0 otherwise
// For touch: button is pressed during over/enter/down/move, not during up/cancel/out/leave
let buttons = if event_type == "pointermove" ||
event_type == "pointerover" ||
event_type == "pointerenter" ||
event_type == "pointerdown"
{
1
} else {
0
};
// For enter/leave events, they don't bubble and are not cancelable
let (bubbles, cancelable) = match event_type {
"pointerenter" | "pointerleave" => {
(EventBubbles::DoesNotBubble, EventCancelable::NotCancelable)
},
_ => (EventBubbles::Bubbles, EventCancelable::from(is_cancelable)),
};
PointerEvent::new(
window,
event_type.into(),
bubbles,
cancelable,
Some(window),
0, // detail
Point2D::new(*self.ScreenX() as i32, *self.ScreenY() as i32),
Point2D::new(*self.ClientX() as i32, *self.ClientY() as i32),
Point2D::new(*self.PageX() as i32, *self.PageY() as i32),
modifiers,
button,
buttons,
None, // related_target
point_in_node,
pointer_id,
1, // width (TODO: could get from touch if available)
1, // height (TODO: could get from touch if available)
pressure,
0.0, // tangential_pressure
0, // tilt_x
0, // tilt_y
0, // twist
PI / 2.0, // altitude_angle (perpendicular to surface)
0.0, // azimuth_angle
"touch".into(),
is_primary,
vec![], // coalesced_events
vec![], // predicted_events
can_gc,
)
}
}
impl TouchMethods<crate::DomTypeHolder> for Touch {
/// <https://w3c.github.io/touch-events/#widl-Touch-identifier>
fn Identifier(&self) -> i32 {
self.identifier
}
/// <https://w3c.github.io/touch-events/#widl-Touch-target>
fn Target(&self) -> DomRoot<EventTarget> {
self.target.get()
}
/// <https://w3c.github.io/touch-events/#widl-Touch-screenX>
fn ScreenX(&self) -> Finite<f64> {
Finite::wrap(self.screen_x)
}
/// <https://w3c.github.io/touch-events/#widl-Touch-screenY>
fn ScreenY(&self) -> Finite<f64> {
Finite::wrap(self.screen_y)
}
/// <https://w3c.github.io/touch-events/#widl-Touch-clientX>
fn ClientX(&self) -> Finite<f64> {
Finite::wrap(self.client_x)
}
/// <https://w3c.github.io/touch-events/#widl-Touch-clientY>
fn ClientY(&self) -> Finite<f64> {
Finite::wrap(self.client_y)
}
/// <https://w3c.github.io/touch-events/#widl-Touch-clientX>
fn PageX(&self) -> Finite<f64> {
Finite::wrap(self.page_x)
}
/// <https://w3c.github.io/touch-events/#widl-Touch-clientY>
fn PageY(&self) -> Finite<f64> {
Finite::wrap(self.page_y)
}
}