Right now the only functionality supported is getting/setting via JS
and resetting when browsing cross origin.
The HTML Specification (7.11 Browsing the web) also specifies how the
name should be restored from history entries, but we don't have those
yet.
Our setInterval implementation currently crashes on DuckDuckGo when it's
invoked with a string argument. In this path, we were creating a native
function to evaluate and execute that string. That evaluation was always
returning a Completion, but NativeFunction expects ThrowCompletionOr.
The conversion from Completion to ThrowCompletionOr would fail a VERIFY
because that conversion is only valid if the Completion is an error; but
we would trigger this conversion even on success.
This change re-implements setTimeout & setInterval in direct accordance
with the spec. So we avoid making that NativeFunction altogether, and
DDG can progress past its invocation to the timer. With this change, we
also have other features we did not previously support, such as passing
any number of arguments to the timers. This does not implement handling
of nesting levels yet.
This is a naive-but-somewhat-functional initial implementation of
HTML Storage.
Note that there is no persistence yet, everything is in-process only,
and one local Storage object per origin.
This isn't perfect (especially the global object situation in
activate_event_handler), but I believe it's in a much more complete
state now :^)
This fixes the issue of crashing in prepare_for_ordinary_call with the
`i < m_size` crash, as it now uses the IDL callback functions which
requires the Environment Settings Object. The environment settings
object for the callback is fetched at the time the callback is created,
for example, WrapperGenerator gets the incumbent settings object for
the callback at the time of wrapping. This allows us to remove passing
in ScriptExecutionContext into EventTarget's constructor.
With this, we can now drop ScriptExecutionContext.
The environment settings object is effectively the context a piece of
script is running under, for example, it contains the origin,
responsible document, realm, global object and event loop for the
current context. This effectively replaces ScriptExecutionContext, but
it cannot be removed in this commit as EventTarget still depends on it.
https://html.spec.whatwg.org/multipage/webappapis.html#environment-settings-object
Being really close to Object.prototype.valueOf() name wise makes this
unnecessarily confusing - while it sometimes serves as the
implementation of a valueOf() function, it's an abstraction which the
spec doesn't have.
Use the appropriate getters to retrieve specific internal slots instead,
most commonly [[FooData]] from the primitive wrapper objects.
For the Object class specifically, use the Value(Object*) ctor instead.
This changes Web::Bindings::throw_dom_exception_if_needed() to return a
JS::ThrowCompletionOr instead of an Optional. This allows callers to
wrap the invocation with a TRY() macro instead of making a follow-up
call to should_return_empty(). Further, this removes all invocations to
vm.exception() in the generated bindings.
The old versions were renamed to JS_DECLARE_OLD_NATIVE_FUNCTION and
JS_DEFINE_OLD_NATIVE_FUNCTION, and will be eventually removed once all
native functions were converted to the new format.
This is the `CSS` namespace defined in IDL here:
https://www.w3.org/TR/cssom-1/#namespacedef-css , not to be confused
with our `Web::CSS` namespace. Words are hard.
`CSS.escape()` lets you escape identifiers that can then be used to
create a CSS string.
I've also stubbed out the `CSS.supports()` function.
This was incorrectly calling DOM::Window::clear_timeout(). In practice,
these functions are interchangeable, but let's have things looking
correct regardless.
Instead of passing a function it is also possible to pass a string,
which is then evaluated as a classic script.
This means we now support the following example from the "timer
initialization steps", step 16 - except that it runs the timers in
reverse order, so the `log` result is `"TWO ONE "`.
https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#timer-initialisation-steps
var log = '';
function logger(s) { log += s + ' '; }
setTimeout({ toString: function () {
setTimeout("logger('ONE')", 100);
return "logger('TWO')";
} }, 100);
Since we don't support IDL typedefs or unions yet, the responsibility
of verifying the type of the argument is temporarily moved from the
generated Wrapper to the implementation.
This is the result of debugging React DOM, which would throw a TypeError
when assigning to window.event in strict mode and then not complete
rendering - here:
cae6350/packages/shared/invokeGuardedCallbackImpl.js (L134)
With this change, the following minimal React example now works!
<div id="app"></div>
<script src="react.development.js"></script>
<script src="react-dom.development.js"></script>
<script>
ReactDOM.render(
React.createElement("h1", null, "Hello World"),
document.getElementById("app")
);
</script>
The spec allows us to optionally return from these for any reason.
Our reason is that we don't have all the infrastructure in place yet to
implement them.
... and `Window.scrollTo()`, which is an alias for `scroll()`.
There is still work that needs to be done here, regarding bringing the
scroll position calculation in line with the spec. Currently we get the
viewport rect from outside, and treat it as if it was the result of
calculating steps 5-9 of the `scroll()` method. But it works. :^)
