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// Copyright 2017 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/svg/svg_tree_scope_resources.h"
#include "third_party/blink/renderer/core/dom/element.h"
#include "third_party/blink/renderer/core/dom/tree_scope.h"
#include "third_party/blink/renderer/core/svg/svg_resource.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string.h"
namespace blink {
SVGTreeScopeResources::SVGTreeScopeResources(TreeScope* tree_scope)
: tree_scope_(tree_scope) {}
LocalSVGResource* SVGTreeScopeResources::ResourceForId(const AtomicString& id) {
if (id.IsEmpty())
return nullptr;
auto& entry = resources_.insert(id, nullptr).stored_value->value;
if (!entry)
entry = MakeGarbageCollected<LocalSVGResource>(*tree_scope_, id);
return entry;
}
LocalSVGResource* SVGTreeScopeResources::ExistingResourceForId(
const AtomicString& id) const {
if (id.IsEmpty())
return nullptr;
return resources_.at(id);
}
void SVGTreeScopeResources::ProcessCustomWeakness(const LivenessBroker& info) {
// Unregister and remove any resources that are no longer alive.
Vector<AtomicString> to_remove;
for (auto& resource_entry : resources_) {
if (info.IsHeapObjectAlive(resource_entry.value))
continue;
resource_entry.value->Unregister();
to_remove.push_back(resource_entry.key);
}
resources_.RemoveAll(to_remove);
}
void SVGTreeScopeResources::Trace(Visitor* visitor) const {
visitor->template RegisterWeakCallbackMethod<
SVGTreeScopeResources, &SVGTreeScopeResources::ProcessCustomWeakness>(
this);
visitor->Trace(resources_);
visitor->Trace(tree_scope_);
}
} // namespace blink
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