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Side by Side Diff: components/resource_provider/public/cpp/resource_loader.h

Issue 1942473002: Eliminate mojo:resource_provider (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: . Created 4 years, 7 months ago
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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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