Add WebstoreInlineInstaller (downloads store data, shows the install UI, and starts the install).

chrome/browser/extensions/webstore_inline_installer.h

+// Copyright (c) 2011 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_WEBSTORE_INLINE_INSTALLER_H_
+#define CHROME_BROWSER_EXTENSIONS_WEBSTORE_INLINE_INSTALLER_H_
+#pragma once
+
+#include <string>
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/values.h"
+#include "chrome/browser/extensions/extension_install_ui.h"
+#include "chrome/browser/extensions/webstore_install_helper.h"
+#include "content/common/url_fetcher.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+
+class TabContents;
+class SafeWebstoreResponseParser;
+
+// Manages inline installs requested by a page (downloads and parses metadata
+// from the webstore, shows the install UI, starts the download once the user
+// confirms).  Clients must implement the WebstoreInlineInstaller::Delegate
+// interface to be notified when the inline install completes (successfully or
+// not).
+class WebstoreInlineInstaller
+    : public base::RefCountedThreadSafe<WebstoreInlineInstaller>,
+      public ExtensionInstallUI::Delegate,
+      public URLFetcher::Delegate,
+      public WebstoreInstallHelper::Delegate {
+ public:
+  class Delegate {
+   public:
+    virtual void OnInlineInstallSuccess() = 0;
+    virtual void OnInlineInstallFailure(const std::string& error) = 0;
+  };
+
+  WebstoreInlineInstaller(TabContents* tab_contents,
+                          std::string webstore_item_id,
+                          Delegate* d);
+  void BeginInstall();
+
+ private:
+  friend class base::RefCountedThreadSafe<WebstoreInlineInstaller>;
+  friend class SafeWebstoreResponseParser;
+
+  virtual ~WebstoreInlineInstaller();
+
+  // Several delegate/client inteface implementations follow. The normal flow
+  // (for successful installs) is:
+  //
+  // 1. BeginInstall: starts the fetch of data from the webstore
+  // 2. OnURLFetchComplete: starts the parsing of data from the webstore
+  // 3. OnWebstoreResponseParseSuccess: starts the parsing of the manifest and
+  //    fetching of icon data.
+  // 4. OnWebstoreParseSuccess: shows the install UI
+  // 5. InstallUIProceed: initiates the .crx download/install
+  //
+  // All flows (whether successful or not) end up in CompleteInstall, which
+  // informs our delegate of success/failure.
+
+  // UrlFetcher::Delegate interface implementation.
+  virtual void OnURLFetchComplete(const URLFetcher* source) OVERRIDE;
+
+  // Client callbacks for SafeWebstoreResponseParser when parsing is complete.
+  void OnWebstoreResponseParseSuccess(DictionaryValue* webstore_data);
+  void OnWebstoreResponseParseFailure(const std::string& error);
+
+  // WebstoreInstallHelper::Delegate interface implementation.
+  virtual void OnWebstoreParseSuccess(
+      const SkBitmap& icon,
+      base::DictionaryValue* parsed_manifest) OVERRIDE;
+  virtual void OnWebstoreParseFailure(
+      InstallHelperResultCode result_code,
+      const std::string& error_message) OVERRIDE;
+
+  // ExtensionInstallUI::Delegate interface implementation.
+  virtual void InstallUIProceed() OVERRIDE;
+  virtual void InstallUIAbort(bool user_initiated) OVERRIDE;
+
+  void CompleteInstall(const std::string& error);
+
+  TabContents* tab_contents_;
+  std::string id_;
+  Delegate* delegate_;
+
+  // For fetching webstore JSON data.
+  scoped_ptr<URLFetcher> webstore_data_url_fetcher_;
+
+  // Extracted from the webstore JSON data response.
+  std::string localized_name_;
+  scoped_ptr<DictionaryValue> webstore_data_;
+  scoped_ptr<DictionaryValue> manifest_;
+  SkBitmap icon_;
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(WebstoreInlineInstaller);
+};
+
+#endif  // CHROME_BROWSER_EXTENSIONS_WEBSTORE_INLINE_INSTALLER_H_