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 #include "extensions/common/permissions/api_permission_set.h"
  15
  16 class GURL;
  17
  18 namespace base {
  19 class FilePath;
  20 }
  21
  22 namespace extensions {
  23
  24 class APIPermissionSet;
  25 class Extension;
  26 class ExtensionAPI;
  27 class FeatureProvider;
  28 class JSONFeatureProviderSource;
  29 class ManifestPermissionSet;
  30 class PermissionMessage;
  31 class PermissionMessageProvider;
  32 class SimpleFeature;
  33 class URLPatternSet;
  34
  35 // Sets up global state for the extensions system. Should be Set() once in each
  36 // process. This should be implemented by the client of the extensions system.
  37 class ExtensionsClient {
  38  public:
  39   typedef std::vector<std::string> ScriptingWhitelist;
  40
  41   virtual ~ExtensionsClient() {}
  42
  43   // Initializes global state. Not done in the constructor because unit tests
  44   // can create additional ExtensionsClients because the utility thread runs
  45   // in-process.
  46   virtual void Initialize() = 0;
  47
  48   // Returns the global PermissionMessageProvider to use to provide permission
  49   // warning strings.
  50   virtual const PermissionMessageProvider& GetPermissionMessageProvider()
  51       const = 0;
  52
  53   // Returns the application name. For example, "Chromium" or "app_shell".
  54   virtual const std::string GetProductName() = 0;
  55
  56   // Create a FeatureProvider for a specific feature type, e.g. "permission".
  57   virtual scoped_ptr<FeatureProvider> CreateFeatureProvider(
  58       const std::string& name) const = 0;
  59
  60   // Create a JSONFeatureProviderSource for a specific feature type,
  61   // e.g. "permission". Currently, all features are loaded from
  62   // JSONFeatureProviderSources.
  63   // This is used primarily in CreateFeatureProvider, above.
  64   virtual scoped_ptr<JSONFeatureProviderSource> CreateFeatureProviderSource(
  65       const std::string& name) const = 0;
  66
  67   // Takes the list of all hosts and filters out those with special
  68   // permission strings. Adds the regular hosts to |new_hosts|,
  69   // and adds the special permission messages to |messages|.
  70   // TODO(sashab): Deprecate this in favour of FilterHostPermissions() below.
  71   virtual void FilterHostPermissions(
  72       const URLPatternSet& hosts,
  73       URLPatternSet* new_hosts,
  74       std::set<PermissionMessage>* messages) const = 0;
  75
  76   // Takes the list of all hosts and filters out those with special
  77   // permission strings. Adds the regular hosts to |new_hosts|,
  78   // and adds any additional permissions to |permissions|.
  79   // TODO(sashab): Split this function in two: One to filter out ignored host
  80   // permissions, and one to get permissions for the given hosts.
  81   virtual void FilterHostPermissions(const URLPatternSet& hosts,
  82                                      URLPatternSet* new_hosts,
  83                                      PermissionIDSet* permissions) const = 0;
  84
  85   // Replaces the scripting whitelist with |whitelist|. Used in the renderer;
  86   // only used for testing in the browser process.
  87   virtual void SetScriptingWhitelist(const ScriptingWhitelist& whitelist) = 0;
  88
  89   // Return the whitelist of extensions that can run content scripts on
  90   // any origin.
  91   virtual const ScriptingWhitelist& GetScriptingWhitelist() const = 0;
  92
  93   // Get the set of chrome:// hosts that |extension| can run content scripts on.
  94   virtual URLPatternSet GetPermittedChromeSchemeHosts(
  95       const Extension* extension,
  96       const APIPermissionSet& api_permissions) const = 0;
  97
  98   // Returns false if content scripts are forbidden from running on |url|.
  99   virtual bool IsScriptableURL(const GURL& url, std::string* error) const = 0;
 100
 101   // Returns true iff a schema named |name| is generated.
 102   virtual bool IsAPISchemaGenerated(const std::string& name) const = 0;
 103
 104   // Gets the generated API schema named |name|.
 105   virtual base::StringPiece GetAPISchema(const std::string& name) const = 0;
 106
 107   // Register non-generated API schema resources with the global ExtensionAPI.
 108   // Called when the ExtensionAPI is lazily initialized.
 109   virtual void RegisterAPISchemaResources(ExtensionAPI* api) const = 0;
 110
 111   // Determines if certain fatal extensions errors should be surpressed
 112   // (i.e., only logged) or allowed (i.e., logged before crashing).
 113   virtual bool ShouldSuppressFatalErrors() const = 0;
 114
 115   // Returns the base webstore URL prefix.
 116   virtual std::string GetWebstoreBaseURL() const = 0;
 117
 118   // Returns the URL to use for update manifest queries.
 119   virtual std::string GetWebstoreUpdateURL() const = 0;
 120
 121   // Returns a flag indicating whether or not a given URL is a valid
 122   // extension blacklist URL.
 123   virtual bool IsBlacklistUpdateURL(const GURL& url) const = 0;
 124
 125   // Returns the set of file paths corresponding to any images within an
 126   // extension's contents that may be displayed directly within the browser UI
 127   // or WebUI, such as icons or theme images. This set of paths is used by the
 128   // extension unpacker to determine which assets should be transcoded safely
 129   // within the utility sandbox.
 130   //
 131   // The default implementation returns the images used as icons for the
 132   // extension itself, so implementors of ExtensionsClient overriding this may
 133   // want to call the base class version and then add additional paths to that
 134   // result.
 135   virtual std::set<base::FilePath> GetBrowserImagePaths(
 136       const Extension* extension);
 137
 138   // Return the extensions client.
 139   static ExtensionsClient* Get();
 140
 141   // Initialize the extensions system with this extensions client.
 142   static void Set(ExtensionsClient* client);
 143 };
 144
 145 }  // namespace extensions
 146
 147 #endif  // EXTENSIONS_COMMON_EXTENSIONS_CLIENT_H_