Public Sessions - prompt the user for pageCapture requests

chrome/browser/extensions/api/page_capture/page_capture_permission_helper.h

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_EXTENSIONS_API_PAGE_CAPTURE_PAGE_CAPTURE_PERMISSION_HELPER_H_
+#define CHROME_BROWSER_EXTENSIONS_API_PAGE_CAPTURE_PAGE_CAPTURE_PERMISSION_HELPER_H_
+
+#include <memory>
+#include <string>
+
+#include "base/callback_forward.h"
+#include "chrome/browser/extensions/extension_install_prompt.h"
+#include "components/prefs/pref_service.h"
+#include "content/public/browser/web_contents.h"
+
+class PrefChangeRegistrar;
+
+namespace extensions {
+class Extension;
+
+class PageCapturePermissionHelper {
+ public:
+  PageCapturePermissionHelper(
+      const Extension* extension,
+      PrefService* prefs,
+      const base::Closure& success_callback,
+      const base::Callback<void(const std::string&)>& failure_callback);
+
+  ~PageCapturePermissionHelper();
+
+  // Handles permission checking inside of Public Sessions.
+  void HandlePermissionRequest(content::WebContents* web_contents);
+
+ private:
+  enum PermissionState {
+    NOT_PROMPTED = 0,
+    SHOWN_PROMPT,
+    ALLOWED,
+    DENIED
+  };
+
+  // Sets up the dialog asking the user for permission.
+  void ShowPermissionPrompt(content::WebContents* web_contents);
+
+  // Handles the user decision of whether to allow page capture.
+  void ResolvePermissionPrompt(ExtensionInstallPrompt::Result prompt_result);
+
+  // Continues with the page capture (if user allowed it), or returns failure
+  // (user denied permission).
+  void ResolvePermissionRequest();
+
+  void SetUserChoice(PermissionState value);
+  PermissionState GetUserChoice();
+
+  std::unique_ptr<ExtensionInstallPrompt> prompt_;
+  std::unique_ptr<PrefChangeRegistrar> pref_change_registrar_;
+  const Extension* extension_;
+  PrefService* prefs_;
+  base::Closure success_callback_;
+  base::Callback<void(const std::string&)> failure_callback_;
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_API_PAGE_CAPTURE_PAGE_CAPTURE_PERMISSION_HELPER_H_