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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 http://mozilla.org/MPL/2.0/. */
use dom::bindings::codegen::Bindings::EventBinding::EventMethods;
use dom::bindings::inheritance::Castable;
use dom::bindings::str::DOMString;
use dom::element::Element;
use dom::event::{Event, EventBubbles, EventCancelable};
use dom::eventtarget::EventTarget;
use dom::mouseevent::MouseEvent;
use dom::node::window_from_node;
/// Trait for elements with defined activation behavior
pub trait Activatable {
fn as_element(&self) -> ∈
// Is this particular instance of the element activatable?
fn is_instance_activatable(&self) -> bool;
// https://html.spec.whatwg.org/multipage/#run-pre-click-activation-steps
fn pre_click_activation(&self);
// https://html.spec.whatwg.org/multipage/#run-canceled-activation-steps
fn canceled_activation(&self);
// https://html.spec.whatwg.org/multipage/#run-post-click-activation-steps
fn activation_behavior(&self, event: &Event, target: &EventTarget);
// https://html.spec.whatwg.org/multipage/#implicit-submission
fn implicit_submission(&self, ctrlKey: bool, shiftKey: bool, altKey: bool, metaKey: bool);
}
/// Whether an activation was initiated via the click() method
#[derive(PartialEq)]
pub enum ActivationSource {
FromClick,
NotFromClick,
}
// https://html.spec.whatwg.org/multipage/#run-synthetic-click-activation-steps
pub fn synthetic_click_activation(element: &Element,
ctrlKey: bool,
shiftKey: bool,
altKey: bool,
metaKey: bool,
source: ActivationSource) {
// Step 1
if element.click_in_progress() {
return;
}
// Step 2
element.set_click_in_progress(true);
// Step 3
let activatable = element.as_maybe_activatable();
if let Some(a) = activatable {
a.pre_click_activation();
}
// Step 4
// https://html.spec.whatwg.org/multipage/#fire-a-synthetic-mouse-event
let win = window_from_node(element);
let target = element.upcast::<EventTarget>();
let mouse = MouseEvent::new(win.r(),
DOMString::from("click"),
EventBubbles::DoesNotBubble,
EventCancelable::NotCancelable,
Some(win.r()),
1,
0,
0,
0,
0,
ctrlKey,
shiftKey,
altKey,
metaKey,
0,
None);
let event = mouse.upcast::<Event>();
if source == ActivationSource::FromClick {
event.set_trusted(false);
}
target.dispatch_event(event);
// Step 5
if let Some(a) = activatable {
if event.DefaultPrevented() {
a.canceled_activation();
} else {
// post click activation
a.activation_behavior(event, target);
}
}
// Step 6
element.set_click_in_progress(false);
}
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