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// Copyright 2021 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_HIGHLIGHT_HIGHLIGHT_REGISTRY_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_HIGHLIGHT_HIGHLIGHT_REGISTRY_H_
#include "third_party/blink/renderer/bindings/core/v8/maplike.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/highlight/highlight.h"
#include "third_party/blink/renderer/core/highlight/highlight_registry_map_entry.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
#include "third_party/blink/renderer/platform/heap/heap_allocator.h"
#include "third_party/blink/renderer/platform/wtf/forward.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string_hash.h"
namespace blink {
// Using LinkedHashSet<HighlightRegistryMapEntry> to store the map entries
// because order of insertion needs to be preserved (for iteration and breaking
// priority ties during painting) and there's no generic LinkedHashMap. Note
// that the hash functions for HighlightRegistryMapEntry don't allow storing
// more than one entry with the same key (highlight name).
using HighlightRegistryMap =
HeapLinkedHashSet<Member<HighlightRegistryMapEntry>,
HashTraits<Member<HighlightRegistryMapEntry>>>;
using HighlightRegistryMapIterable = Maplike<AtomicString, Member<Highlight>>;
class LocalFrame;
class CORE_EXPORT HighlightRegistry : public ScriptWrappable,
public Supplement<LocalDOMWindow>,
public HighlightRegistryMapIterable {
DEFINE_WRAPPERTYPEINFO();
public:
static const char kSupplementName[];
static HighlightRegistry* From(LocalDOMWindow&);
explicit HighlightRegistry(LocalDOMWindow&);
~HighlightRegistry() override;
void Trace(blink::Visitor*) const override;
HighlightRegistry* setForBinding(ScriptState*,
AtomicString,
Member<Highlight>,
ExceptionState&);
void clearForBinding(ScriptState*, ExceptionState&);
bool deleteForBinding(ScriptState*, const AtomicString&, ExceptionState&);
wtf_size_t size() const { return highlights_.size(); }
const HighlightRegistryMap& GetHighlights() const { return highlights_; }
void ValidateHighlightMarkers();
void ScheduleRepaint() const;
enum OverlayStackingPosition {
kOverlayStackingPositionBelow = -1,
kOverlayStackingPositionEquivalent = 0,
kOverlayStackingPositionAbove = 1,
};
int8_t CompareOverlayStackingPosition(const AtomicString& highlight_name1,
const Highlight* highlight1,
const AtomicString& highlight_name2,
const Highlight* highlight2) const;
class IterationSource final
: public HighlightRegistryMapIterable::IterationSource {
public:
explicit IterationSource(const HighlightRegistry& highlight_registry);
bool Next(ScriptState*,
AtomicString&,
Member<Highlight>&,
ExceptionState&) override;
void Trace(blink::Visitor*) const override;
private:
wtf_size_t index_;
HeapVector<Member<HighlightRegistryMapEntry>> highlights_snapshot_;
};
private:
HighlightRegistryMap highlights_;
Member<LocalFrame> frame_;
HighlightRegistryMap::iterator GetMapIterator(const AtomicString& key) {
return highlights_.find(
MakeGarbageCollected<HighlightRegistryMapEntry>(key));
}
bool GetMapEntry(ScriptState*,
const AtomicString& key,
Member<Highlight>& value,
ExceptionState&) override {
auto iterator = GetMapIterator(key);
if (iterator == highlights_.end())
return false;
value = iterator->Get()->highlight;
return true;
}
HighlightRegistryMapIterable::IterationSource* StartIteration(
ScriptState*,
ExceptionState&) override;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_HIGHLIGHT_HIGHLIGHT_REGISTRY_H_
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