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// Copyright 2025 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_WEBAPPS_BROWSER_LAUNCH_QUEUE_LAUNCH_QUEUE_H_
#define COMPONENTS_WEBAPPS_BROWSER_LAUNCH_QUEUE_LAUNCH_QUEUE_H_
#include <vector>
#include "components/webapps/browser/launch_queue/launch_params.h"
#include "components/webapps/common/web_app_id.h"
#include "content/public/browser/web_contents_observer.h"
class GURL;
namespace content {
class WebContents;
class NavigationHandle;
} // namespace content
namespace webapps {
class LaunchQueueDelegate;
// This handles passing LaunchParams through to its WebContents.
// There are three scenarios in which launch params are sent to a WebContents:
// - Navigating launches: The launch params are stored until the navigation
// completes.
//
// - Non-navigating launches: The launch params are sent immediately to the
// WebContents unless there was a navigating launch still pending, then it
// gets added to the queue.
//
// - Page reloads: The last launch params sent to the page get resent.
// Note that this is not in the spec and a bit magical. This is to cater for
// the scenario where a user opens a web app via a file handler which provides
// a file handle to the app. Without this reload mechanism the page would lose
// access to the file handle if the user were to refresh the page.
class LaunchQueue : public content::WebContentsObserver {
public:
LaunchQueue(content::WebContents* web_contents,
std::unique_ptr<LaunchQueueDelegate> delegate);
LaunchQueue(const LaunchQueue&) = delete;
LaunchQueue& operator=(const LaunchQueue&) = delete;
~LaunchQueue() override;
void Enqueue(LaunchParams launch_params);
const webapps::AppId* GetPendingLaunchAppId() const;
void FlushForTesting() const;
private:
// Reset self back to the initial state.
void Reset();
// content::WebContentsObserver:
void DidFinishNavigation(content::NavigationHandle* handle) override;
void SendQueuedLaunchParams(const GURL& current_url);
void SendLaunchParams(LaunchParams launch_params, const GURL& current_url);
// Launch params queued up to be sent to the WebContents.
std::vector<LaunchParams> queue_;
// Whether to send the queue of launch params on the next navigation.
bool pending_navigation_ = false;
// A copy of the last sent launch params ready to resend should the user
// reload the page.
std::optional<LaunchParams> last_sent_queued_launch_params_;
std::unique_ptr<LaunchQueueDelegate> delegate_;
};
} // namespace webapps
#endif // COMPONENTS_WEBAPPS_BROWSER_LAUNCH_QUEUE_LAUNCH_QUEUE_H_
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