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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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