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f7c4165dde
Ownership of the drag data store is a bit weird. In a normal drag-and- drop operation, the DragAndDropEventHandler owns the store. When events are fired for the operation, the DataTransfer object assigned to those events are "associated" with the store. We currently represent that with an Optional<DragDataStore&>. However, it's also possible to create DataTransfer objects from scripts. Those objects create their own drag data store. This puts DataTransfer in a weird situation where it may own a store or just reference one. Rather than coming up with something like Variant<DDS, DDS&> or using MaybeOwned<DDS> here, we can get by with just making the store reference counted.
81 lines
2.2 KiB
C++
81 lines
2.2 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 <AK/ByteBuffer.h>
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#include <AK/ByteString.h>
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#include <AK/FlyString.h>
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#include <AK/NonnullRefPtr.h>
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#include <AK/RefCounted.h>
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#include <AK/String.h>
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#include <AK/Vector.h>
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#include <LibGfx/Bitmap.h>
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#include <LibGfx/Point.h>
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namespace Web::HTML {
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struct DragDataStoreItem {
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enum class Kind {
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Text,
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File,
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};
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// https://html.spec.whatwg.org/multipage/dnd.html#the-drag-data-item-kind
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Kind kind { Kind::Text };
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// https://html.spec.whatwg.org/multipage/dnd.html#the-drag-data-item-type-string
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String type_string;
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ByteBuffer data;
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ByteString file_name;
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};
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// https://html.spec.whatwg.org/multipage/dnd.html#drag-data-store
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class DragDataStore : public RefCounted<DragDataStore> {
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public:
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enum class Mode {
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ReadWrite,
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ReadOnly,
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Protected,
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};
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static NonnullRefPtr<DragDataStore> create();
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~DragDataStore();
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void add_item(DragDataStoreItem item) { m_item_list.append(move(item)); }
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ReadonlySpan<DragDataStoreItem> item_list() const { return m_item_list; }
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bool has_text_item() const;
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Mode mode() const { return m_mode; }
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void set_mode(Mode mode) { m_mode = mode; }
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FlyString allowed_effects_state() const { return m_allowed_effects_state; }
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void set_allowed_effects_state(FlyString allowed_effects_state) { m_allowed_effects_state = move(allowed_effects_state); }
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private:
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DragDataStore();
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// https://html.spec.whatwg.org/multipage/dnd.html#drag-data-store-item-list
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Vector<DragDataStoreItem> m_item_list;
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// https://html.spec.whatwg.org/multipage/dnd.html#drag-data-store-default-feedback
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String m_default_feedback;
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// https://html.spec.whatwg.org/multipage/dnd.html#drag-data-store-bitmap
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RefPtr<Gfx::Bitmap> m_bitmap;
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// https://html.spec.whatwg.org/multipage/dnd.html#drag-data-store-hot-spot-coordinate
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Gfx::IntPoint m_hot_spot_coordinate;
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// https://html.spec.whatwg.org/multipage/dnd.html#drag-data-store-mode
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Mode m_mode { Mode::Protected };
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// https://html.spec.whatwg.org/multipage/dnd.html#drag-data-store-allowed-effects-state
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FlyString m_allowed_effects_state;
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};
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}
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