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LibWeb: Implement basic version of CSSOM View's VisualViewport

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We got some errors while loading https://twinings.co.uk/ about this
interface missing, and it looked fairly simple so I sketched it out.
Note that I did leave some FIXMEs where it's not clear exactly which
metrics we should be returning.
This commit is contained in:
Andreas Kling 2023-06-17 16:40:35 +02:00
parent 2a914a7a59
commit 9f6ceff7cf
13 changed files with 257 additions and 2 deletions
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49
Userland/Libraries/LibWeb/CSS/VisualViewport.h Normal file
View file

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/*
* Copyright (c) 2023, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibWeb/DOM/EventTarget.h>
namespace Web::CSS {
// https://drafts.csswg.org/cssom-view/#visualviewport
class VisualViewport final : public DOM::EventTarget {
WEB_PLATFORM_OBJECT(VisualViewport, DOM::EventTarget);
public:
static WebIDL::ExceptionOr<JS::NonnullGCPtr<VisualViewport>> create(DOM::Document&);
virtual ~VisualViewport() override = default;
[[nodiscard]] double offset_left() const;
[[nodiscard]] double offset_top() const;
[[nodiscard]] double page_left() const;
[[nodiscard]] double page_top() const;
[[nodiscard]] double width() const;
[[nodiscard]] double height() const;
[[nodiscard]] double scale() const;
void set_onresize(WebIDL::CallbackType*);
WebIDL::CallbackType* onresize();
void set_onscroll(WebIDL::CallbackType*);
WebIDL::CallbackType* onscroll();
void set_onscrollend(WebIDL::CallbackType*);
WebIDL::CallbackType* onscrollend();
private:
explicit VisualViewport(DOM::Document&);
virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
virtual void visit_edges(Cell::Visitor&) override;
JS::NonnullGCPtr<DOM::Document> m_document;
};
}