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LibJS+LibWeb: Set [[CanBlock]] false to Agent for window agent

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similar-origin window agents have the [[CanBlock]] flag set to false.
Achieve this by hooking up JS's concept with an agent to HTML::Agent.
For now, this is only hooked up to the similar-origin window agent
case but should be extended to the other agent types in the future.
This commit is contained in:
Shannon Booth
2025-04-20 16:49:34 +12:00
committed by Tim Flynn
parent 4cd186f3f5
commit e124ef52ee
Notes: github-actions[bot] 2025-04-22 15:52:53 +00:00 
Author: https://github.com/shannonbooth
Commit: https://github.com/LadybirdBrowser/ladybird/commit/e124ef52ee9
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4406
16 changed files with 106 additions and 44 deletions
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15
Tests/LibWeb/Text/input/wpt-import/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-agent-formalism/requires-failure.https.any.html Normal file
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@@ -0,0 +1,15 @@
<!doctype html>
<meta charset=utf-8>
<script>
self.GLOBAL = {
isWindow: function() { return true; },
isWorker: function() { return false; },
isShadowRealm: function() { return false; },
};
</script>
<script src="../../../../../resources/testharness.js"></script>
<script src="../../../../../resources/testharnessreport.js"></script>
<div id=log></div>
<script src="../../../../../html/webappapis/scripting/processing-model-2/integration-with-the-javascript-agent-formalism/requires-failure.https.any.js"></script>

11
Tests/LibWeb/Text/input/wpt-import/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-agent-formalism/requires-failure.https.any.js Normal file
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@@ -0,0 +1,11 @@
// META: global=window,serviceworker
test(() => {
// See https://github.com/whatwg/html/issues/5380 for why not `new SharedArrayBuffer()`
const sab = new WebAssembly.Memory({ shared:true, initial:1, maximum:1 }).buffer;
const ta = new Int32Array(sab);
assert_throws_js(TypeError, () => {
Atomics.wait(ta, 0, 0, 10);
});
}, `[[CanBlock]] in a ${self.constructor.name}`);