1 // Copyright (c) 2012 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.
5 #ifndef CHROME_BROWSER_EXTENSIONS_EXTERNAL_PROVIDER_INTERFACE_H_
6 #define CHROME_BROWSER_EXTENSIONS_EXTERNAL_PROVIDER_INTERFACE_H_
10 #include "base/memory/linked_ptr.h"
11 #include "extensions/common/manifest.h"
20 namespace extensions {
22 // This class is an abstract class for implementing external extensions
24 class ExternalProviderInterface {
26 // ExternalProvider uses this interface to communicate back to the
27 // caller what extensions are registered, and which |id|, |version| and |path|
28 // they have. See also VisitRegisteredExtension below. Ownership of |version|
29 // is not transferred to the visitor. Callers of the methods below must
30 // ensure that |id| is a valid extension id (use Extension::IdIsValid(id)).
31 class VisitorInterface {
33 // Return true if the extension install will proceed. Install will not
34 // proceed if the extension is already installed from a higher priority
36 virtual bool OnExternalExtensionFileFound(
37 const std::string& id,
38 const base::Version* version,
39 const base::FilePath& path,
40 Manifest::Location location,
42 bool mark_acknowledged) = 0;
44 // Return true if the extension install will proceed. Install might not
45 // proceed if the extension is already installed from a higher priority
47 virtual bool OnExternalExtensionUpdateUrlFound(
48 const std::string& id,
49 const GURL& update_url,
50 Manifest::Location location,
52 bool mark_acknowledged) = 0;
54 // Called after all the external extensions have been reported
55 // through the above two methods. |provider| is a pointer to the
56 // provider that is now ready (typically this), and the
57 // implementation of OnExternalProviderReady() should be able to
58 // safely assert that provider->IsReady().
59 virtual void OnExternalProviderReady(
60 const ExternalProviderInterface* provider) = 0;
63 virtual ~VisitorInterface() {}
66 virtual ~ExternalProviderInterface() {}
68 // The visitor (ExtensionsService) calls this function before it goes away.
69 virtual void ServiceShutdown() = 0;
71 // Enumerate registered extensions, calling
72 // OnExternalExtension(File|UpdateUrl)Found on the |visitor| object for each
73 // registered extension found.
74 virtual void VisitRegisteredExtension() = 0;
76 // Test if this provider has an extension with id |id| registered.
77 virtual bool HasExtension(const std::string& id) const = 0;
79 // Gets details of an extension by its id. Output params will be set only
80 // if they are not NULL. If an output parameter is not specified by the
81 // provider type, it will not be changed.
82 // This function is no longer used outside unit tests.
83 virtual bool GetExtensionDetails(
84 const std::string& id,
85 Manifest::Location* location,
86 scoped_ptr<base::Version>* version) const = 0;
88 // Determines if this provider had loaded the list of external extensions
90 virtual bool IsReady() const = 0;
93 typedef std::vector<linked_ptr<ExternalProviderInterface> >
96 } // namespace extensions
98 #endif // CHROME_BROWSER_EXTENSIONS_EXTERNAL_PROVIDER_INTERFACE_H_