extensions/common/extensions_client.h

   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 EXTENSIONS_COMMON_EXTENSIONS_CLIENT_H_
   6 #define EXTENSIONS_COMMON_EXTENSIONS_CLIENT_H_
   7
   8 #include <set>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/strings/string_piece.h"
  14
  15 class GURL;
  16
  17 namespace extensions {
  18
  19 class APIPermissionSet;
  20 class Extension;
  21 class ExtensionAPI;
  22 class FeatureProvider;
  23 class JSONFeatureProviderSource;
  24 class ManifestPermissionSet;
  25 class PermissionMessage;
  26 class PermissionMessageProvider;
  27 class SimpleFeature;
  28 class URLPatternSet;
  29
  30 // Sets up global state for the extensions system. Should be Set() once in each
  31 // process. This should be implemented by the client of the extensions system.
  32 class ExtensionsClient {
  33  public:
  34   typedef std::vector<std::string> ScriptingWhitelist;
  35
  36   virtual ~ExtensionsClient() {}
  37
  38   // Initializes global state. Not done in the constructor because unit tests
  39   // can create additional ExtensionsClients because the utility thread runs
  40   // in-process.
  41   virtual void Initialize() = 0;
  42
  43   // Returns the global PermissionMessageProvider to use to provide permission
  44   // warning strings.
  45   virtual const PermissionMessageProvider& GetPermissionMessageProvider()
  46       const = 0;
  47
  48   // Create a FeatureProvider for a specific feature type, e.g. "permission".
  49   virtual scoped_ptr<FeatureProvider> CreateFeatureProvider(
  50       const std::string& name) const = 0;
  51
  52   // Create a JSONFeatureProviderSource for a specific feature type,
  53   // e.g. "permission". Currently, all features are loaded from
  54   // JSONFeatureProviderSources.
  55   // This is used primarily in CreateFeatureProvider, above.
  56   virtual scoped_ptr<JSONFeatureProviderSource> CreateFeatureProviderSource(
  57       const std::string& name) const = 0;
  58
  59   // Takes the list of all hosts and filters out those with special
  60   // permission strings. Adds the regular hosts to |new_hosts|,
  61   // and adds the special permission messages to |messages|.
  62   virtual void FilterHostPermissions(
  63       const URLPatternSet& hosts,
  64       URLPatternSet* new_hosts,
  65       std::set<PermissionMessage>* messages) const = 0;
  66
  67   // Replaces the scripting whitelist with |whitelist|. Used in the renderer;
  68   // only used for testing in the browser process.
  69   virtual void SetScriptingWhitelist(const ScriptingWhitelist& whitelist) = 0;
  70
  71   // Return the whitelist of extensions that can run content scripts on
  72   // any origin.
  73   virtual const ScriptingWhitelist& GetScriptingWhitelist() const = 0;
  74
  75   // Get the set of chrome:// hosts that |extension| can run content scripts on.
  76   virtual URLPatternSet GetPermittedChromeSchemeHosts(
  77       const Extension* extension,
  78       const APIPermissionSet& api_permissions) const = 0;
  79
  80   // Returns false if content scripts are forbidden from running on |url|.
  81   virtual bool IsScriptableURL(const GURL& url, std::string* error) const = 0;
  82
  83   // Returns true iff a schema named |name| is generated.
  84   virtual bool IsAPISchemaGenerated(const std::string& name) const = 0;
  85
  86   // Gets the generated API schema named |name|.
  87   virtual base::StringPiece GetAPISchema(const std::string& name) const = 0;
  88
  89   // Register non-generated API schema resources with the global ExtensionAPI.
  90   // Called when the ExtensionAPI is lazily initialized.
  91   virtual void RegisterAPISchemaResources(ExtensionAPI* api) const = 0;
  92
  93   // Determines if certain fatal extensions errors should be surpressed
  94   // (i.e., only logged) or allowed (i.e., logged before crashing).
  95   virtual bool ShouldSuppressFatalErrors() const = 0;
  96
  97   // Return the extensions client.
  98   static ExtensionsClient* Get();
  99
 100   // Initialize the extensions system with this extensions client.
 101   static void Set(ExtensionsClient* client);
 102 };
 103
 104 }  // namespace extensions
 105
 106 #endif  // EXTENSIONS_COMMON_EXTENSIONS_CLIENT_H_