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b3bfd02e64
When scripts receive a DataTransferItem from any IDL method, the spec requires we return the same DataTransferItem for a particular item in the drag data store. Meaning, we cannot just create these on the fly as needed. To do this, we store a list of DataTransferItem on the DataTransfer object. We will return one of these objects any time one is requested by a script. It feels a bit weird to have the DataTransfer object store: the drag data store, a DataTransferItemList, and a list of DataTransferItem. But this is how other engines implement this as well. It basically has to be this way as DataTransferItemList is just a proxy to the DataTransfer - meaning, DataTransfer is the source of truth for all IDL access.
86 lines
2.9 KiB
C++
86 lines
2.9 KiB
C++
/*
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* Copyright (c) 2024, Tim Flynn <trflynn89@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibJS/Forward.h>
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#include <LibWeb/Bindings/PlatformObject.h>
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#include <LibWeb/HTML/DragDataStore.h>
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namespace Web::HTML {
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#define ENUMERATE_DATA_TRANSFER_EFFECTS \
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__ENUMERATE_DATA_TRANSFER_EFFECT(none) \
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__ENUMERATE_DATA_TRANSFER_EFFECT(copy) \
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__ENUMERATE_DATA_TRANSFER_EFFECT(copyLink) \
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__ENUMERATE_DATA_TRANSFER_EFFECT(copyMove) \
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__ENUMERATE_DATA_TRANSFER_EFFECT(link) \
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__ENUMERATE_DATA_TRANSFER_EFFECT(linkMove) \
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__ENUMERATE_DATA_TRANSFER_EFFECT(move) \
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__ENUMERATE_DATA_TRANSFER_EFFECT(all) \
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__ENUMERATE_DATA_TRANSFER_EFFECT(uninitialized)
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namespace DataTransferEffect {
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#define __ENUMERATE_DATA_TRANSFER_EFFECT(name) extern FlyString name;
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ENUMERATE_DATA_TRANSFER_EFFECTS
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#undef __ENUMERATE_DATA_TRANSFER_EFFECT
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}
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// https://html.spec.whatwg.org/multipage/dnd.html#the-datatransfer-interface
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class DataTransfer : public Bindings::PlatformObject {
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WEB_PLATFORM_OBJECT(DataTransfer, Bindings::PlatformObject);
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JS_DECLARE_ALLOCATOR(DataTransfer);
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public:
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static JS::NonnullGCPtr<DataTransfer> create(JS::Realm&, NonnullRefPtr<DragDataStore>);
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static JS::NonnullGCPtr<DataTransfer> construct_impl(JS::Realm&);
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virtual ~DataTransfer() override;
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FlyString const& drop_effect() const { return m_drop_effect; }
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void set_drop_effect(String const&);
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void set_drop_effect(FlyString);
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FlyString const& effect_allowed() const { return m_effect_allowed; }
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void set_effect_allowed(String const&);
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void set_effect_allowed(FlyString);
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void set_effect_allowed_internal(FlyString);
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JS::NonnullGCPtr<DataTransferItemList> items();
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ReadonlySpan<String> types() const;
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String get_data(String const& format) const;
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JS::NonnullGCPtr<FileAPI::FileList> files() const;
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void disassociate_with_drag_data_store();
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private:
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DataTransfer(JS::Realm&, NonnullRefPtr<DragDataStore>);
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virtual void initialize(JS::Realm&) override;
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virtual void visit_edges(JS::Cell::Visitor&) override;
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void update_data_transfer_types_list();
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// https://html.spec.whatwg.org/multipage/dnd.html#dom-datatransfer-dropeffect
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FlyString m_drop_effect { DataTransferEffect::none };
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// https://html.spec.whatwg.org/multipage/dnd.html#dom-datatransfer-effectallowed
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FlyString m_effect_allowed { DataTransferEffect::none };
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// https://html.spec.whatwg.org/multipage/dnd.html#dom-datatransfer-items
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JS::GCPtr<DataTransferItemList> m_items;
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Vector<JS::NonnullGCPtr<DataTransferItem>> m_item_list;
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// https://html.spec.whatwg.org/multipage/dnd.html#concept-datatransfer-types
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Vector<String> m_types;
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// https://html.spec.whatwg.org/multipage/dnd.html#the-datatransfer-interface:drag-data-store-3
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RefPtr<DragDataStore> m_associated_drag_data_store;
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};
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}
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