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LibWeb: Parse and load the HTMLMediaElement's src attribute

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The spec for loading a media element is quite huge. This implements just
enough to parse the attribute, fetch the corresponding media object, and
decode the media object (if it is a video). While doing so, this also
implements most network state tracking and firing DOM events that may be
observed via JavaScript.
This commit is contained in:
Timothy Flynn 2023-04-04 14:14:33 -04:00 • committed by Linus Groh
parent 460e1bd072
commit e2f32e6ab3
3 changed files with 603 additions and 0 deletions
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27
Userland/Libraries/LibWeb/HTML/HTMLMediaElement.h
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@ -6,6 +6,9 @@
#pragma once
#include <AK/ByteBuffer.h>
#include <AK/Variant.h>
#include <LibJS/SafeFunction.h>
#include <LibWeb/HTML/EventLoop/Task.h>
#include <LibWeb/HTML/HTMLElement.h>
@ -32,19 +35,43 @@ public:
void load() const;
void pause() const;
JS::NonnullGCPtr<VideoTrackList> video_tracks() const { return *m_video_tracks; }
protected:
HTMLMediaElement(DOM::Document&, DOM::QualifiedName);
virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
virtual void visit_edges(Cell::Visitor&) override;
private:
struct EntireResource { };
using ByteRange = Variant<EntireResource>; // FIXME: This will need to include "until end" and an actual byte range.
virtual void parse_attribute(DeprecatedFlyString const& name, DeprecatedString const& value) override;
Task::Source media_element_event_task_source() const { return m_media_element_event_task_source.source; }
WebIDL::ExceptionOr<void> load_element();
WebIDL::ExceptionOr<void> select_resource();
WebIDL::ExceptionOr<void> fetch_resource(AK::URL const&, Function<void()> failure_callback);
static bool verify_response(JS::NonnullGCPtr<Fetch::Infrastructure::Response>, ByteRange const&);
WebIDL::ExceptionOr<void> process_media_data(Function<void()> failure_callback);
WebIDL::ExceptionOr<void> handle_media_source_failure();
void forget_media_resource_specific_tracks();
// https://html.spec.whatwg.org/multipage/media.html#media-element-event-task-source
UniqueTaskSource m_media_element_event_task_source {};
// https://html.spec.whatwg.org/multipage/media.html#dom-media-networkstate
NetworkState m_network_state { NetworkState::Empty };
// https://html.spec.whatwg.org/multipage/media.html#dom-media-videotracks
JS::GCPtr<VideoTrackList> m_video_tracks;
// https://html.spec.whatwg.org/multipage/media.html#media-data
ByteBuffer m_media_data;
JS::GCPtr<Fetch::Infrastructure::FetchController> m_fetch_controller;
};
}