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      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_COMMON_EXTENSIONS_CHROME_EXTENSIONS_CLIENT_H_
      6 #define CHROME_COMMON_EXTENSIONS_CHROME_EXTENSIONS_CLIENT_H_
      7 
      8 #include "base/basictypes.h"
      9 #include "base/compiler_specific.h"
     10 #include "base/lazy_instance.h"
     11 #include "chrome/common/extensions/permissions/chrome_api_permissions.h"
     12 #include "chrome/common/extensions/permissions/chrome_permission_message_provider.h"
     13 #include "extensions/common/extensions_client.h"
     14 
     15 namespace extensions {
     16 
     17 // The implementation of ExtensionsClient for Chrome, which encapsulates the
     18 // global knowledge of features, permissions, and manifest fields.
     19 class ChromeExtensionsClient : public ExtensionsClient {
     20  public:
     21   ChromeExtensionsClient();
     22   virtual ~ChromeExtensionsClient();
     23 
     24   virtual void Initialize() OVERRIDE;
     25 
     26   virtual const PermissionsProvider& GetPermissionsProvider() const OVERRIDE;
     27   virtual const PermissionMessageProvider& GetPermissionMessageProvider() const
     28       OVERRIDE;
     29   virtual FeatureProvider* GetFeatureProviderByName(const std::string& name)
     30       const OVERRIDE;
     31   virtual void FilterHostPermissions(
     32       const URLPatternSet& hosts,
     33       URLPatternSet* new_hosts,
     34       std::set<PermissionMessage>* messages) const OVERRIDE;
     35   virtual void SetScriptingWhitelist(const ScriptingWhitelist& whitelist)
     36       OVERRIDE;
     37   virtual const ScriptingWhitelist& GetScriptingWhitelist() const OVERRIDE;
     38   virtual URLPatternSet GetPermittedChromeSchemeHosts(
     39       const Extension* extension,
     40       const APIPermissionSet& api_permissions) const OVERRIDE;
     41   virtual bool IsScriptableURL(const GURL& url, std::string* error) const
     42       OVERRIDE;
     43   // Get the LazyInstance for ChromeExtensionsClient.
     44   static ChromeExtensionsClient* GetInstance();
     45 
     46  private:
     47   const ChromeAPIPermissions chrome_api_permissions_;
     48   const ChromePermissionMessageProvider permission_message_provider_;
     49 
     50   // A whitelist of extensions that can script anywhere. Do not add to this
     51   // list (except in tests) without consulting the Extensions team first.
     52   // Note: Component extensions have this right implicitly and do not need to be
     53   // added to this list.
     54   ScriptingWhitelist scripting_whitelist_;
     55 
     56   friend struct base::DefaultLazyInstanceTraits<ChromeExtensionsClient>;
     57 
     58   DISALLOW_COPY_AND_ASSIGN(ChromeExtensionsClient);
     59 };
     60 
     61 }  // namespace extensions
     62 
     63 #endif  // CHROME_COMMON_EXTENSIONS_CHROME_EXTENSIONS_CLIENT_H_
     64