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Test Info: Warnings
- This test gets skipped with pattern: http3 OR http2 OR true
- Manifest: devtools/server/tests/browser/browser.toml
/* Any copyright is dedicated to the Public Domain.
"use strict";
// Test the CanvasFrameAnonymousContentHelper event handling mechanism.
const TEST_URL =
"data:text/html;charset=utf-8,CanvasFrameAnonymousContentHelper test";
add_task(async function () {
const tab = await addTab(TEST_URL);
await SpecialPowers.spawn(tab.linkedBrowser, [], async function () {
const { require } = ChromeUtils.importESModule(
);
const {
HighlighterEnvironment,
const {
CanvasFrameAnonymousContentHelper,
const doc = content.document;
const nodeBuilder = () => {
const root = doc.createElement("div");
const child = doc.createElement("div");
child.style =
"pointer-events:auto;width:200px;height:200px;background:red;";
child.id = "child-element";
child.className = "child-element";
root.appendChild(child);
return root;
};
info("Building the helper");
const env = new HighlighterEnvironment();
env.initFromWindow(doc.defaultView);
const helper = new CanvasFrameAnonymousContentHelper(env, nodeBuilder);
await helper.initialize();
const el = helper.getElement("child-element");
info("Adding an event listener on the inserted element");
let mouseDownHandled = 0;
function onMouseDown(e, id) {
is(
id,
"child-element",
"The mousedown event was triggered on the element"
);
ok(!e.originalTarget, "The originalTarget property isn't available");
mouseDownHandled++;
}
el.addEventListener("mousedown", onMouseDown);
function once(target, event) {
return new Promise(done => {
target.addEventListener(event, done, { once: true });
});
}
info("Synthesizing an event on the inserted element");
let onDocMouseDown = once(doc, "mousedown");
synthesizeMouseDown(100, 100, doc.defaultView);
await onDocMouseDown;
is(
mouseDownHandled,
1,
"The mousedown event was handled once on the element"
);
info("Synthesizing an event somewhere else");
onDocMouseDown = once(doc, "mousedown");
synthesizeMouseDown(400, 400, doc.defaultView);
await onDocMouseDown;
is(
mouseDownHandled,
1,
"The mousedown event was not handled on the element"
);
info("Removing the event listener");
el.removeEventListener("mousedown", onMouseDown);
info("Synthesizing another event after the listener has been removed");
// Using a document event listener to know when the event has been synthesized.
onDocMouseDown = once(doc, "mousedown");
synthesizeMouseDown(100, 100, doc.defaultView);
await onDocMouseDown;
is(
mouseDownHandled,
1,
"The mousedown event hasn't been handled after the listener was removed"
);
info("Adding again the event listener");
el.addEventListener("mousedown", onMouseDown);
info("Destroying the helper");
env.destroy();
helper.destroy();
info("Synthesizing another event after the helper has been destroyed");
// Using a document event listener to know when the event has been synthesized.
onDocMouseDown = once(doc, "mousedown");
synthesizeMouseDown(100, 100, doc.defaultView);
await onDocMouseDown;
is(
mouseDownHandled,
1,
"The mousedown event hasn't been handled after the helper was destroyed"
);
function synthesizeMouseDown(x, y, win) {
// We need to make sure the inserted anonymous content can be targeted by the
// event right after having been inserted, and so we need to force a sync
// reflow.
win.document.documentElement.offsetWidth;
EventUtils.synthesizeMouseAtPoint(x, y, { type: "mousedown" }, win);
}
});
gBrowser.removeCurrentTab();
});