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1 // Copyright 2015 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 COMPONENTS_RESOURCE_PROVIDER_PUBLIC_CPP_RESOURCE_LOADER_H_ | |
6 #define COMPONENTS_RESOURCE_PROVIDER_PUBLIC_CPP_RESOURCE_LOADER_H_ | |
7 | |
8 #include <map> | |
9 #include <memory> | |
10 #include <set> | |
11 #include <string> | |
12 #include <vector> | |
13 | |
14 #include "base/macros.h" | |
15 #include "components/resource_provider/public/interfaces/resource_provider.mojom
.h" | |
16 #include "mojo/platform_handle/platform_handle.h" | |
17 #include "mojo/public/cpp/bindings/array.h" | |
18 #include "mojo/public/cpp/system/handle.h" | |
19 | |
20 namespace base { | |
21 class File; | |
22 } | |
23 | |
24 namespace shell { | |
25 class Connector; | |
26 } | |
27 | |
28 namespace resource_provider { | |
29 | |
30 // ResourceLoader handles making a request to ResourceProvider and blocking | |
31 // until the resources are available. Expected use is to create a ResourceLoader | |
32 // and shortly thereafter call BlockUntilLoaded() to wait until the resources | |
33 // have been obtained. | |
34 class ResourceLoader { | |
35 public: | |
36 ResourceLoader(shell::Connector* connector, | |
37 const std::set<std::string>& paths); | |
38 ~ResourceLoader(); | |
39 | |
40 // Uses WaitForIncomingMessage() to block until the results are available, or | |
41 // an error occurs. Returns true if the resources were obtained, false on | |
42 // error. This immediately returns if the resources have already been | |
43 // obtained. | |
44 bool BlockUntilLoaded(); | |
45 | |
46 // Releases and returns the file wrapping the handle. | |
47 base::File ReleaseFile(const std::string& path); | |
48 | |
49 bool loaded() const { return loaded_; } | |
50 | |
51 private: | |
52 using ResourceMap = std::map<std::string, std::unique_ptr<base::File>>; | |
53 | |
54 // Callback when resources have loaded. | |
55 void OnGotResources(const std::vector<std::string>& paths, | |
56 mojo::Array<mojo::ScopedHandle> resources); | |
57 | |
58 ResourceProviderPtr resource_provider_; | |
59 | |
60 ResourceMap resource_map_; | |
61 | |
62 bool loaded_; | |
63 bool did_block_; | |
64 | |
65 DISALLOW_COPY_AND_ASSIGN(ResourceLoader); | |
66 }; | |
67 | |
68 } // namespace resource_provider | |
69 | |
70 #endif // COMPONENTS_RESOURCE_PROVIDER_PUBLIC_CPP_RESOURCE_LOADER_H_ | |
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