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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/performance_manager/public/resource_attribution/page_context.h"
#include <utility>
#include "base/check.h"
#include "base/strings/strcat.h"
#include "components/performance_manager/graph/page_node_impl.h"
#include "components/performance_manager/performance_manager_tab_helper.h"
#include "components/performance_manager/public/graph/graph.h"
#include "components/performance_manager/resource_attribution/performance_manager_aliases.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/web_contents.h"
namespace resource_attribution {
using PerformanceManagerTabHelper =
performance_manager::PerformanceManagerTabHelper;
PageContext::PageContext(base::UnguessableToken token,
base::WeakPtr<content::WebContents> weak_web_contents,
base::WeakPtr<PageNode> weak_node)
: token_(std::move(token)),
weak_web_contents_(std::move(weak_web_contents)),
weak_node_(std::move(weak_node)) {
CHECK(!token_.is_empty());
}
PageContext::~PageContext() = default;
PageContext::PageContext(const PageContext& other) = default;
PageContext& PageContext::operator=(const PageContext& other) = default;
PageContext::PageContext(PageContext&& other) = default;
PageContext& PageContext::operator=(PageContext&& other) = default;
// static
std::optional<PageContext> PageContext::FromWebContents(
content::WebContents* contents) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
if (!contents) {
return std::nullopt;
}
auto* tab_helper = PerformanceManagerTabHelper::FromWebContents(contents);
if (!tab_helper) {
return std::nullopt;
}
PageNodeImpl* node_impl = tab_helper->primary_page_node();
CHECK(node_impl);
return PageContext(node_impl->page_token().value(), contents->GetWeakPtr(),
node_impl->GetWeakPtr());
}
content::WebContents* PageContext::GetWebContents() const {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
return weak_web_contents_.get();
}
base::WeakPtr<PageNode> PageContext::GetWeakPageNode() const {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
return weak_node_;
}
// static
PageContext PageContext::FromPageNode(const PageNode* node) {
CHECK(node);
DCHECK_ON_GRAPH_SEQUENCE(node->GetGraph());
auto* node_impl = PageNodeImpl::FromNode(node);
return PageContext(node_impl->page_token().value(),
node_impl->GetWebContents(), node_impl->GetWeakPtr());
}
// static
std::optional<PageContext> PageContext::FromWeakPageNode(
base::WeakPtr<PageNode> node) {
if (!node) {
return std::nullopt;
}
return FromPageNode(node.get());
}
PageNode* PageContext::GetPageNode() const {
if (weak_node_) {
// `weak_node` will check anyway if dereferenced from the wrong sequence,
// but let's be explicit.
DCHECK_ON_GRAPH_SEQUENCE(weak_node_->GetGraph());
return weak_node_.get();
}
return nullptr;
}
std::string PageContext::ToString() const {
return base::StrCat({"PageContext:", token_.ToString()});
}
} // namespace resource_attribution
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