text: // Copyright 2013 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_COMMON_EXTENSIONS_CHROME_EXTENSIONS_CLIENT_H_
  #define CHROME_COMMON_EXTENSIONS_CHROME_EXTENSIONS_CLIENT_H_
  
  #include <memory>
  
  #include "base/compiler_specific.h"
  #include "base/lazy_instance.h"
  #include "base/macros.h"
  #include "chrome/common/extensions/permissions/chrome_api_permissions.h"
  #include "chrome/common/extensions/permissions/chrome_permission_message_provider.h"
  #include "extensions/common/extensions_client.h"
  #include "extensions/common/permissions/extensions_api_permissions.h"
  #include "url/gurl.h"
  
  namespace extensions {
  
  // The implementation of ExtensionsClient for Chrome, which encapsulates the
  // global knowledge of features, permissions, and manifest fields.
  class ChromeExtensionsClient : public ExtensionsClient {
   public:
    ChromeExtensionsClient();
    ~ChromeExtensionsClient() override;
  
    void Initialize() override;
  
    const PermissionMessageProvider& GetPermissionMessageProvider()
        const override;
    const std::string GetProductName() override;
    std::unique_ptr<FeatureProvider> CreateFeatureProvider(
        const std::string& name) const override;
    std::unique_ptr<JSONFeatureProviderSource> CreateAPIFeatureSource()
        const override;
    void FilterHostPermissions(const URLPatternSet& hosts,
                               URLPatternSet* new_hosts,
                               PermissionIDSet* permissions) const override;
    void SetScriptingWhitelist(const ScriptingWhitelist& whitelist) override;
    const ScriptingWhitelist& GetScriptingWhitelist() const override;
    URLPatternSet GetPermittedChromeSchemeHosts(
        const Extension* extension,
        const APIPermissionSet& api_permissions) const override;
    bool IsScriptableURL(const GURL& url, std::string* error) const override;
    bool IsAPISchemaGenerated(const std::string& name) const override;
    base::StringPiece GetAPISchema(const std::string& name) const override;
    bool ShouldSuppressFatalErrors() const override;
    void RecordDidSuppressFatalError() override;
    const GURL& GetWebstoreBaseURL() const override;
    const GURL& GetWebstoreUpdateURL() const override;
    bool IsBlacklistUpdateURL(const GURL& url) const override;
    std::set<base::FilePath> GetBrowserImagePaths(
        const Extension* extension) override;
    bool ExtensionAPIEnabledInExtensionServiceWorkers() const override;
  
    // Get the LazyInstance for ChromeExtensionsClient.
    static ChromeExtensionsClient* GetInstance();
  
   private:
    const ChromeAPIPermissions chrome_api_permissions_;
    const ExtensionsAPIPermissions extensions_api_permissions_;
    const ChromePermissionMessageProvider permission_message_provider_;
  
    // A whitelist of extensions that can script anywhere. Do not add to this
    // list (except in tests) without consulting the Extensions team first.
    // Note: Component extensions have this right implicitly and do not need to be
    // added to this list.
    ScriptingWhitelist scripting_whitelist_;
  
    // Mutable to allow caching in a const method.
    mutable GURL webstore_base_url_;
    mutable GURL webstore_update_url_;
  
    friend struct base::DefaultLazyInstanceTraits<ChromeExtensionsClient>;
  
    DISALLOW_COPY_AND_ASSIGN(ChromeExtensionsClient);
  };
  
  }  // namespace extensions
  
  #endif  // CHROME_COMMON_EXTENSIONS_CHROME_EXTENSIONS_CLIENT_H_
  