Determine whether to show "Add to Homescreen" dialog or WebAPK infobar

chrome/browser/android/webapps/add_to_homescreen_process.h

-// Copyright 2015 The Chromium Authors. All rights reserved.
+// Copyright 2016 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_ANDROID_WEBAPPS_ADD_TO_HOMESCREEN_DIALOG_HELPER_H_
-#define CHROME_BROWSER_ANDROID_WEBAPPS_ADD_TO_HOMESCREEN_DIALOG_HELPER_H_
+#ifndef CHROME_BROWSER_ANDROID_WEBAPPS_ADD_TO_HOMESCREEN_PROCESS_H_
+#define CHROME_BROWSER_ANDROID_WEBAPPS_ADD_TO_HOMESCREEN_PROCESS_H_
 
 #include "base/android/jni_android.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/macros.h"
+#include "base/memory/weak_ptr.h"
 #include "chrome/browser/android/webapps/add_to_homescreen_data_fetcher.h"
-#include "third_party/skia/include/core/SkBitmap.h"
 
 namespace content {
 class WebContents;
 }
 
 namespace IPC {
 class Message;
 }
 
 class GURL;
+class SkBitmap;
+struct InstallableData;
 struct ShortcutInfo;
 
-// AddToHomescreenDialogHelper is the C++ counterpart of
-// org.chromium.chrome.browser's AddToHomescreenDialogHelper in Java. The object
-// is owned by the Java object. It is created from there via a JNI (Initialize)
-// call and MUST BE DESTROYED via Destroy().
-class AddToHomescreenDialogHelper :
-    public AddToHomescreenDataFetcher::Observer {
+// AddToHomescreenProcess is the C++ counterpart of
+// org.chromium.chrome.browser's AddToHomescreenProcess in Java. The object
+// is owned by the Java object. It is created from there via a JNI
+// (InitializeAndStart) call and MUST BE DESTROYED via Destroy().
+class AddToHomescreenProcess : public AddToHomescreenDataFetcher::Observer {
  public:
-  AddToHomescreenDialogHelper(JNIEnv* env,
-                              jobject obj,
-                              content::WebContents* web_contents);
+  AddToHomescreenProcess(JNIEnv* env, jobject obj);
+
+  // Registers JNI hooks.
+  static bool Register(JNIEnv* env);
 
   // Called by the Java counterpart to destroy its native half.
   void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
 
-  // Registers JNI hooks.
-  static bool RegisterAddToHomescreenDialogHelper(JNIEnv* env);
-
   // Adds a shortcut to the current URL to the Android home screen.
   void AddShortcut(JNIEnv* env,
                    const base::android::JavaParamRef<jobject>& obj,
                    const base::android::JavaParamRef<jstring>& title);
 
-  // AddToHomescreenDataFetcher::Observer
-  void OnUserTitleAvailable(const base::string16& user_title) override;
-  void OnDataAvailable(const ShortcutInfo& info, const SkBitmap& icon) override;
-  SkBitmap FinalizeLauncherIconInBackground(const SkBitmap& icon,
-                                            const GURL& url,
-                                            bool* is_generated) override;
+  // Starts add-to-homescreen process.
+  void Start(content::WebContents* web_contents);
 
  private:
-  virtual ~AddToHomescreenDialogHelper();
+  ~AddToHomescreenProcess() override;
+
+  // Checks whether the current page in |web_contents| can be made into a
+  // WebAPK.
+  void CheckWebApkCompatible(content::WebContents* web_contents);
+
+  // Called once the request for "installability data" started by
+  // CheckWebApkCompatible() has completed.
+  void OnGotWebApkCompatibilityData(content::WebContents* web_contents,
+                                    const InstallableData& installable_data);
+
+  // Shows alert to prompt user for name of home screen shortcut.
+  void ShowDialog();
+
+  // Starts fetching home screen shortcut data (like Web Manifest and home
+  // screen icon).
+  void StartFetchingInfoForShortcut(content::WebContents* web_contents);
 
   // Called only when the AddToHomescreenDataFetcher has retrieved all of the
   // data needed to add the shortcut.
   void AddShortcut(const ShortcutInfo& info, const SkBitmap& icon);
 
   void RecordAddToHomescreen();
 
+  // AddToHomescreenDataFetcher::Observer
+  void OnUserTitleAvailable(const base::string16& user_title) override;
+  void OnDataAvailable(const ShortcutInfo& info, const SkBitmap& icon) override;
+  SkBitmap FinalizeLauncherIconInBackground(const SkBitmap& icon,
+                                            const GURL& url,
+                                            bool* is_generated) override;
+
   // Points to the Java object.
   base::android::ScopedJavaGlobalRef<jobject> java_ref_;
 
   // Whether the user has requested that a shortcut be added while a fetch was
   // in progress.
   bool add_shortcut_pending_;
 
   // Fetches data required to add a shortcut.
   scoped_refptr<AddToHomescreenDataFetcher> data_fetcher_;
 
-  DISALLOW_COPY_AND_ASSIGN(AddToHomescreenDialogHelper);
+  base::WeakPtrFactory<AddToHomescreenProcess> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(AddToHomescreenProcess);
 };
 
-#endif  // CHROME_BROWSER_ANDROID_WEBAPPS_ADD_TO_HOMESCREEN_DIALOG_HELPER_H_
+#endif  // CHROME_BROWSER_ANDROID_WEBAPPS_ADD_TO_HOMESCREEN_PROCESS_H_