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      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_USER_SCRIPT_MASTER_H_
      6 #define CHROME_BROWSER_EXTENSIONS_SHARED_USER_SCRIPT_MASTER_H_
      7 
      8 #include <set>
      9 
     10 #include "base/scoped_observer.h"
     11 #include "chrome/browser/extensions/user_script_loader.h"
     12 #include "extensions/browser/extension_registry_observer.h"
     13 #include "extensions/common/extension.h"
     14 #include "extensions/common/user_script.h"
     15 
     16 namespace content {
     17 class BrowserContext;
     18 }
     19 
     20 class Profile;
     21 
     22 namespace extensions {
     23 
     24 class ExtensionRegistry;
     25 
     26 // Manages statically-defined user scripts for all extensions. Owns a
     27 // UserScriptLoader to which file loading and shared memory management
     28 // operations are delegated.
     29 class SharedUserScriptMaster : public ExtensionRegistryObserver {
     30  public:
     31   explicit SharedUserScriptMaster(Profile* profile);
     32   virtual ~SharedUserScriptMaster();
     33 
     34   // Provides access to loader state method: scripts_ready().
     35   bool scripts_ready() const { return loader_.scripts_ready(); }
     36 
     37  private:
     38   // ExtensionRegistryObserver implementation.
     39   virtual void OnExtensionLoaded(content::BrowserContext* browser_context,
     40                                  const Extension* extension) OVERRIDE;
     41   virtual void OnExtensionUnloaded(
     42       content::BrowserContext* browser_context,
     43       const Extension* extension,
     44       UnloadedExtensionInfo::Reason reason) OVERRIDE;
     45 
     46   // Gets an extension's scripts' metadata; i.e., gets a list of UserScript
     47   // objects that contains script info, but not the contents of the scripts.
     48   const std::set<UserScript> GetScriptsMetadata(const Extension* extension);
     49 
     50   // Script loader that handles loading contents of scripts into shared memory
     51   // and notifying renderers of scripts in shared memory.
     52   UserScriptLoader loader_;
     53 
     54   // The profile for which the scripts managed here are installed.
     55   Profile* profile_;
     56 
     57   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
     58       extension_registry_observer_;
     59 
     60   DISALLOW_COPY_AND_ASSIGN(SharedUserScriptMaster);
     61 };
     62 
     63 }  // namespace extensions
     64 
     65 #endif  // CHROME_BROWSER_EXTENSIONS_SHARED_USER_SCRIPT_MASTER_H_
     66