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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 CHROME_BROWSER_UI_PDF_INFOBAR_PDF_INFOBAR_CONTROLLER_H_
#define CHROME_BROWSER_UI_PDF_INFOBAR_PDF_INFOBAR_CONTROLLER_H_
#include <optional>
#include "base/callback_list.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/shell_integration.h"
#include "components/infobars/core/infobar_manager.h"
#include "content/public/browser/web_contents_observer.h"
class BrowserWindowInterface;
namespace content {
class NavigationHandle;
} // namespace content
namespace infobars {
class ContentInfoBarManager;
class InfoBar;
} // namespace infobars
// Toggles the PDF infobar if Chrome isn't the default PDF viewer. This infobar
// offers to set Chrome as the default PDF viewer if it's not already.
class PdfInfoBarController : public infobars::InfoBarManager::Observer,
public content::WebContentsObserver {
public:
explicit PdfInfoBarController(BrowserWindowInterface* browser);
~PdfInfoBarController() override;
// Enables the PDF infobar to show only if `default_browser_prompt_shown` is
// false. If the PDF-infobar experiment is enabled and should be shown at
// startup, shows the infobar for `startup_browser`.
static void MaybeShowInfoBarAtStartup(
base::WeakPtr<BrowserWindowInterface> startup_browser,
bool default_browser_prompt_shown);
// Callback passed to `BrowserWindowInterface::RegisterActiveTabDidChange()`.
void OnActiveTabChanged(BrowserWindowInterface* browser);
// Callback passed to `BrowserWindowInterface::RegisterBrowserDidClose()`.
void OnBrowserClosed(BrowserWindowInterface* browser);
// WebContentsObserver:
void DidFinishNavigation(
content::NavigationHandle* navigation_handle) override;
// InfoBarManager::Observer:
void OnInfoBarRemoved(infobars::InfoBar* infobar, bool animate) override;
// Shows the PDF infobar if:
// * `default_state` indicates that Chrome (including other channels) is not
// the default PDF viewer
// * the PDF viewer is enabled in settings
// * setting Chrome as default isn't forbidden by policy
// * the infobar wasn't shown recently or the max number of times
// * the default-browser prompt wasn't shown in this session
// Exposed for testing.
void MaybeShowInfoBarCallback(
shell_integration::DefaultWebClientState default_state);
static void SetDefaultBrowserPromptShownForTesting(
bool default_browser_prompt_shown);
private:
// Asynchronously checks if Chrome is the default PDF viewer, and calls
// `MaybeShowInfoBarCallback()` with the result.
void MaybeShowInfoBar();
// The browser that owns this `PdfInfoBarController`.
const raw_ptr<BrowserWindowInterface> browser_;
// The infobar being shown, or `nullptr` if no infobar currently exists.
raw_ptr<infobars::InfoBar> infobar_ = nullptr;
// The manager of the infobar being shown, or `nullptr` if no infobar
// currently exists.
raw_ptr<infobars::ContentInfoBarManager> infobar_manager_ = nullptr;
// Enables `OnActiveTabChanged()` and `OnBrowserClosed()` to be called.
std::vector<base::CallbackListSubscription> browser_subscriptions_;
// Must be the last member variable.
base::WeakPtrFactory<PdfInfoBarController> weak_factory_{this};
// True if the default-browser prompt has been shown in this session, false
// if it was not shown. Has no value if the default-browser prompt is still
// deciding whether to appear.
static std::optional<bool> default_browser_prompt_shown_;
};
#endif // CHROME_BROWSER_UI_PDF_INFOBAR_PDF_INFOBAR_CONTROLLER_H_
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