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// Copyright 2018 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.
#include "third_party/blink/renderer/core/layout/custom/layout_worklet.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_binding_for_core.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/frame/local_dom_window.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/core/layout/custom/document_layout_definition.h"
#include "third_party/blink/renderer/core/layout/custom/layout_worklet_global_scope_proxy.h"
#include "third_party/blink/renderer/core/layout/custom/pending_layout_registry.h"
namespace blink {
const size_t LayoutWorklet::kNumGlobalScopes = 2u;
DocumentLayoutDefinition* const kInvalidDocumentLayoutDefinition = nullptr;
// static
LayoutWorklet* LayoutWorklet::From(LocalDOMWindow& window) {
LayoutWorklet* supplement =
Supplement<LocalDOMWindow>::From<LayoutWorklet>(window);
if (!supplement && window.GetFrame()) {
supplement = Create(window.GetFrame());
ProvideTo(window, supplement);
}
return supplement;
}
// static
LayoutWorklet* LayoutWorklet::Create(LocalFrame* frame) {
return MakeGarbageCollected<LayoutWorklet>(frame);
}
LayoutWorklet::LayoutWorklet(LocalFrame* frame)
: Worklet(frame->GetDocument()),
Supplement<LocalDOMWindow>(*frame->DomWindow()),
pending_layout_registry_(MakeGarbageCollected<PendingLayoutRegistry>()) {}
LayoutWorklet::~LayoutWorklet() = default;
const char LayoutWorklet::kSupplementName[] = "LayoutWorklet";
void LayoutWorklet::AddPendingLayout(const AtomicString& name, Node* node) {
pending_layout_registry_->AddPendingLayout(name, node);
}
LayoutWorkletGlobalScopeProxy* LayoutWorklet::Proxy() {
return LayoutWorkletGlobalScopeProxy::From(FindAvailableGlobalScope());
}
void LayoutWorklet::Trace(blink::Visitor* visitor) {
visitor->Trace(document_definition_map_);
visitor->Trace(pending_layout_registry_);
Worklet::Trace(visitor);
Supplement<LocalDOMWindow>::Trace(visitor);
}
bool LayoutWorklet::NeedsToCreateGlobalScope() {
return GetNumberOfGlobalScopes() < kNumGlobalScopes;
}
WorkletGlobalScopeProxy* LayoutWorklet::CreateGlobalScope() {
DCHECK(NeedsToCreateGlobalScope());
return MakeGarbageCollected<LayoutWorkletGlobalScopeProxy>(
To<Document>(GetExecutionContext())->GetFrame(), ModuleResponsesMap(),
pending_layout_registry_, GetNumberOfGlobalScopes() + 1);
}
} // namespace blink
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