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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_UI_WEB_APPLICATIONS_NAVIGATION_HANDLE_USER_DATA_FORWARDER_H_
#define CHROME_BROWSER_UI_WEB_APPLICATIONS_NAVIGATION_HANDLE_USER_DATA_FORWARDER_H_
#include "base/supports_user_data.h"
#include "content/public/browser/navigation_handle.h"
#include "content/public/browser/navigation_handle_user_data.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_observer.h"
#include "content/public/browser/web_contents_user_data.h"
namespace web_app {
// Helper class that takes a NavigationHandleUserData and attaches it to the
// first navigation that is started in the given WebContents. The user data
// needs to implement a `AttachToNavigationHandle` method to do the actual
// attaching.
// This is a plain `base::SupportsUserData::Data` rather than a
// `WebContentsUserData` to make it easier to re-use the same user data key
// as what is used by the underlying `NavigationHandleUserData`.
template <typename UserDataType>
class NavigationHandleUserDataForwarder : public content::WebContentsObserver,
public base::SupportsUserData::Data {
public:
NavigationHandleUserDataForwarder(content::WebContents& contents,
std::unique_ptr<UserDataType> data,
GURL target_url)
: content::WebContentsObserver(&contents),
data_(std::move(data)),
target_url_(std::move(target_url)) {}
~NavigationHandleUserDataForwarder() override = default;
// Deletes the current instance of `NavigationHandleUserDataForwarder`
// in the associated `WebContents`.
void SelfDestruct() {
CHECK_EQ(web_contents()->GetUserData(UserDataKey()), this);
web_contents()->RemoveUserData(UserDataKey());
}
// content::WebContentsObserver overrides:
void DidStartNavigation(
content::NavigationHandle* navigation_handle) override {
if (navigation_handle->GetURL() == target_url_) {
UserDataType::AttachToNavigationHandle(*navigation_handle,
std::move(data_));
}
SelfDestruct();
}
static const void* UserDataKey() { return UserDataType::UserDataKey(); }
private:
std::unique_ptr<UserDataType> data_;
GURL target_url_;
};
} // namespace web_app
#endif // CHROME_BROWSER_UI_WEB_APPLICATIONS_NAVIGATION_HANDLE_USER_DATA_FORWARDER_H_
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