Merge Chromium + Blink git repositories
[chromium-blink-merge.git] / chrome / browser / extensions / api / file_handlers / mime_util.h
blobe1bc2480d115ce1625c05e72f23bbeec107cb969
1 // Copyright 2013 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 // This file provides MIME related utilities.
7 #ifndef CHROME_BROWSER_EXTENSIONS_API_FILE_HANDLERS_MIME_UTIL_H_
8 #define CHROME_BROWSER_EXTENSIONS_API_FILE_HANDLERS_MIME_UTIL_H_
10 #include <string>
11 #include <vector>
13 #include "base/callback.h"
14 #include "base/memory/scoped_ptr.h"
15 #include "base/memory/weak_ptr.h"
17 class Profile;
19 namespace base {
20 class FilePath;
21 } // namespace base
23 namespace storage {
24 class FileSystemURL;
25 } // namespace storage
27 namespace extensions {
28 namespace app_file_handler_util {
30 // Gets a MIME type for a local path and returns it with |callback|. If not
31 // found, then the MIME type is an empty string.
32 void GetMimeTypeForLocalPath(
33 Profile* profile,
34 const base::FilePath& local_path,
35 const base::Callback<void(const std::string&)>& callback);
37 // Collects MIME types for files passed in the input vector. For non-native
38 // file systems tries to fetch the MIME type from metadata. For native ones,
39 // tries to sniff or guess by looking at the extension. If MIME type is not
40 // available, then an empty string is returned in the result vector.
41 class MimeTypeCollector {
42 public:
43 typedef base::Callback<void(scoped_ptr<std::vector<std::string> >)>
44 CompletionCallback;
46 explicit MimeTypeCollector(Profile* profile);
47 virtual ~MimeTypeCollector();
49 // Collects all mime types asynchronously for a vector of URLs and upon
50 // completion, calls the |callback|. It can be called only once.
51 void CollectForURLs(const std::vector<storage::FileSystemURL>& urls,
52 const CompletionCallback& callback);
54 // Collects all mime types asynchronously for a vector of local file paths and
55 // upon completion, calls the |callback|. It can be called only once.
56 void CollectForLocalPaths(const std::vector<base::FilePath>& local_paths,
57 const CompletionCallback& callback);
59 private:
60 // Called, when the |index|-th input file (or URL) got processed.
61 void OnMimeTypeCollected(size_t index, const std::string& mime_type);
63 Profile* profile_;
64 scoped_ptr<std::vector<std::string> > result_;
65 size_t left_;
66 CompletionCallback callback_;
67 base::WeakPtrFactory<MimeTypeCollector> weak_ptr_factory_;
69 DISALLOW_COPY_AND_ASSIGN(MimeTypeCollector);
72 } // namespace app_file_handler_util
73 } // namespace extensions
75 #endif // CHROME_BROWSER_EXTENSIONS_API_FILE_HANDLERS_MIME_UTIL_H_