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Side by Side Diff: content/browser/font_list_async.h

Issue 7800015: prune down content_dll change to just the CONTENT_EXPORTS (Closed)
Patch Set: update copyright headers, merge Created 9 years, 3 months ago
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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef CONTENT_BROWSER_FONT_LIST_ASYNC_H_ 5 #ifndef CONTENT_BROWSER_FONT_LIST_ASYNC_H_
6 #define CONTENT_BROWSER_FONT_LIST_ASYNC_H_ 6 #define CONTENT_BROWSER_FONT_LIST_ASYNC_H_
7 7
8 #include "base/callback.h" 8 #include "base/callback.h"
9 #include "base/memory/ref_counted.h" 9 #include "base/memory/ref_counted.h"
10 #include "base/memory/scoped_ptr.h" 10 #include "base/memory/scoped_ptr.h"
11 #include "content/common/content_export.h"
11 12
12 namespace base { 13 namespace base {
13 class ListValue; 14 class ListValue;
14 } 15 }
15 16
16 namespace content { 17 namespace content {
17 18
18 // Wraps ownership of a ListValue so we can send it across threads without 19 // Wraps ownership of a ListValue so we can send it across threads without
19 // having ownership problems (for example if the calling thread goes away 20 // having ownership problems (for example if the calling thread goes away
20 // before the callback is executed, we want the ListValue to be destroyed. 21 // before the callback is executed, we want the ListValue to be destroyed.
21 struct FontListResult : public base::RefCountedThreadSafe<FontListResult> { 22 struct CONTENT_EXPORT FontListResult
23 : public base::RefCountedThreadSafe<FontListResult> {
22 FontListResult(); 24 FontListResult();
23 ~FontListResult(); 25 ~FontListResult();
24 26
25 scoped_ptr<base::ListValue> list; 27 scoped_ptr<base::ListValue> list;
26 }; 28 };
27 29
28 // Retrieves the list of fonts on the system as a list of strings. It provides 30 // Retrieves the list of fonts on the system as a list of strings. It provides
29 // a non-blocking interface to GetFontList_SlowBlocking in common/. 31 // a non-blocking interface to GetFontList_SlowBlocking in common/.
30 // 32 //
31 // This function will run asynchronously on a background thread since getting 33 // This function will run asynchronously on a background thread since getting
32 // the font list from the system can be slow. This function may be called from 34 // the font list from the system can be slow. This function may be called from
33 // any thread that has a BrowserThread::ID. The callback will be executed on 35 // any thread that has a BrowserThread::ID. The callback will be executed on
34 // the calling thread. 36 // the calling thread.
35 // 37 //
36 // If the caller wants to take ownership of the ListValue, it can just do 38 // If the caller wants to take ownership of the ListValue, it can just do
37 // FontListResult.list.release() or use scoped_ptr.swap() because this value 39 // FontListResult.list.release() or use scoped_ptr.swap() because this value
38 // isn't used for anything else. 40 // isn't used for anything else.
39 void GetFontListAsync( 41 CONTENT_EXPORT void GetFontListAsync(
40 const base::Callback<void(scoped_refptr<FontListResult>)>& callback); 42 const base::Callback<void(scoped_refptr<FontListResult>)>& callback);
41 43
42 } // namespace content 44 } // namespace content
43 45
44 #endif // CONTENT_BROWSER_FONT_LIST_ASYNC_H_ 46 #endif // CONTENT_BROWSER_FONT_LIST_ASYNC_H_
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