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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_PAGE_LOAD_METRICS_BROWSER_PAGE_LOAD_METRICS_EMBEDDER_BASE_H_
#define COMPONENTS_PAGE_LOAD_METRICS_BROWSER_PAGE_LOAD_METRICS_EMBEDDER_BASE_H_
#include "base/memory/raw_ptr.h"
#include "components/page_load_metrics/browser/page_load_metrics_embedder_interface.h"
namespace page_load_metrics {
class PageLoadTracker;
// This is base class for PageLoadMetricsEmbedderInterface implementation, it
// registers components' observers which are common among the embedders, while,
// the embedder implementation may override RegisterEmbedderObservers() for its
// specific observers.
class PageLoadMetricsEmbedderBase : public PageLoadMetricsEmbedderInterface {
public:
explicit PageLoadMetricsEmbedderBase(content::WebContents* web_contents);
// PageLoadMetricsEmbedderInterface:
void RegisterObservers(PageLoadTracker* tracker,
content::NavigationHandle* navigation_handle) override;
std::unique_ptr<base::OneShotTimer> CreateTimer() override;
bool ShouldObserveScheme(std::string_view scheme) override;
content::WebContents* web_contents() const { return web_contents_; }
protected:
// Registers the common page load metrics observers that should be added for
// regular web pages. This should be called by subclasses in their
// `RegisterObservers()` override after performing any page-specific checks
// to determine whether common observers should be installed.
//
// This method should not be called for pages that don't represent regular
// web page loads, such as:
// - Special chrome:// pages (e.g., chrome://new-tab-page)
// - Extension pages (chrome-extension://...)
// - Side panels
// - Non-tab Web UI pages
//
// For these cases, subclasses should implement their own page-specific
// observer registration logic.
void RegisterCommonObservers(PageLoadTracker* tracker);
~PageLoadMetricsEmbedderBase() override;
private:
const raw_ptr<content::WebContents> web_contents_;
};
} // namespace page_load_metrics
#endif // COMPONENTS_PAGE_LOAD_METRICS_BROWSER_PAGE_LOAD_METRICS_EMBEDDER_BASE_H_
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