chrome/browser/extensions/shared_module_service.h

   1 // Copyright 2014 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_BROWSER_EXTENSIONS_SHARED_MODULE_SERVICE_H_
   6 #define CHROME_BROWSER_EXTENSIONS_SHARED_MODULE_SERVICE_H_
   7
   8 #include <list>
   9
  10 #include "chrome/browser/extensions/install_observer.h"
  11 #include "extensions/common/manifest_handlers/shared_module_info.h"
  12
  13 namespace content {
  14 class BrowserContext;
  15 }
  16
  17 namespace extensions {
  18
  19 class Extension;
  20 class ExtensionSet;
  21
  22 class SharedModuleService : public InstallObserver {
  23  public:
  24   enum ImportStatus {
  25     // No imports needed.
  26     IMPORT_STATUS_OK,
  27
  28     // Imports are needed, but can be satisfied (i.e., there are missing or
  29     // outdated imports for a webstore extension).
  30     IMPORT_STATUS_UNSATISFIED,
  31
  32     // Imports are needed, and can't be satisfied (i.e., missing or outdated
  33     // imports for an extension not in the webstore).
  34     IMPORT_STATUS_UNRECOVERABLE
  35   };
  36
  37   explicit SharedModuleService(content::BrowserContext* context);
  38   virtual ~SharedModuleService();
  39
  40   // Checks an extension's imports. Imports that are not installed are stored
  41   // in |missing_modules|, and imports that are out of date are stored in
  42   // |outdated_modules|.
  43   ImportStatus CheckImports(
  44       const extensions::Extension* extension,
  45       std::list<SharedModuleInfo::ImportInfo>* missing_modules,
  46       std::list<SharedModuleInfo::ImportInfo>* outdated_modules);
  47
  48   // Checks an extension's shared module imports to see if they are satisfied.
  49   // If they are not, this function adds the dependencies to the pending install
  50   // list if |extension| came from the webstore.
  51   ImportStatus SatisfyImports(const extensions::Extension* extension);
  52
  53  private:
  54   // Returns a set of extensions that import a given extension.
  55   scoped_ptr<const ExtensionSet> GetDependentExtensions(
  56       const Extension* extension);
  57
  58   // Uninstalls shared modules that were only referenced by |extension|.
  59   void PruneSharedModulesOnUninstall(const Extension* extension);
  60
  61   // InstallObserver implementation:
  62   virtual void OnExtensionUninstalled(const Extension* extension) OVERRIDE;
  63   virtual void OnShutdown() OVERRIDE;
  64
  65   // The context associated with this SharedModuleService.
  66   content::BrowserContext* context_;
  67
  68   // Whether or not we are actively observing installs.
  69   bool observing_;
  70
  71   DISALLOW_COPY_AND_ASSIGN(SharedModuleService);
  72 };
  73
  74 }  // namespace extensions
  75
  76 #endif  // CHROME_BROWSER_EXTENSIONS_SHARED_MODULE_SERVICE_H_