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1 // Copyright (c) 2012 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 CHROME_BROWSER_NET_CLIENT_HINTS_H_ | |
6 #define CHROME_BROWSER_NET_CLIENT_HINTS_H_ | |
7 | |
8 #include <string> | |
9 | |
10 #include "base/memory/ref_counted.h" | |
11 #include "base/values.h" | |
12 #include "ui/gfx/rect.h" | |
13 | |
14 struct ScreenHints; | |
15 typedef std::map<std::pair<int, int>, ScreenHints> ScreenMap; | |
Ryan Sleevi
2013/01/17 01:57:56
nit: Should this be a dependent type of ClientHint
bengr (incorrect)
2013/01/18 02:12:00
Done.
| |
16 | |
17 struct ScreenHints { | |
18 ScreenHints() : | |
19 view_bounds(gfx::Rect(0, 0)), device_pixel_ratio(0.0), hints_str("") {} | |
20 ScreenHints(int width, int height, float d, std::string s) : | |
21 view_bounds(gfx::Rect(width, height)), device_pixel_ratio(d), | |
22 hints_str(s) {} | |
23 gfx::Rect view_bounds; | |
24 float device_pixel_ratio; | |
25 std::string hints_str; | |
26 }; | |
27 | |
28 namespace content { | |
29 class RenderWidgetHostViewPort; | |
30 } | |
Ryan Sleevi
2013/01/17 01:57:56
I meant including this forward decl.
Your typedef
bengr (incorrect)
2013/01/18 02:12:00
Done.
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31 | |
Ryan Sleevi
2013/01/17 01:57:56
No suitable namespace here? We use chrome_browser_
bengr (incorrect)
2013/01/18 02:12:00
Done.
| |
32 // ClientHints is a repository in Chrome for information used | |
33 // to create the Client-Hints request header. For more information, see: | |
34 // https://github.com/igrigorik/http-client-hints/blob/master/ | |
35 // draft-grigorik-http-client-hints-00.txt | |
36 | |
37 class ClientHints : public base::RefCountedThreadSafe<ClientHints> { | |
38 public: | |
39 | |
40 ClientHints(); | |
41 | |
42 | |
43 // Checks to see if screen information is available for the render view with | |
44 // the given process id and render view id. | |
45 bool RetrieveScreenInfoIfUnavailable(int process_id, int render_view_id); | |
46 | |
47 // Returns client hints pertaining to screen information. The format is: | |
48 // "vh=xx, vw=yy, dpr=zz", where xx, yy, and zz are the viewport height, | |
49 // viewport width, and device pixel ratio, respectively. These values are the | |
50 // same as the values returned by the javascript commands: | |
51 // window.innerHeight, window.innerWidth, and window.devicePixelRatio. | |
52 // The function should be called only if IsScreenInfoAvailable() returns true. | |
53 std::string GetScreenInfoHints(int process_id, int render_view_id); | |
54 | |
55 | |
56 private: | |
57 friend class ClientHintsTest; | |
58 friend class base::RefCountedThreadSafe<ClientHints>; | |
59 ~ClientHints(); | |
Ryan Sleevi
2013/01/17 01:57:56
nit: newline between the friend decls
bengr (incorrect)
2013/01/18 02:12:00
Done.
| |
60 bool IsScreenInfoAvailable(int process_id, int render_view_id); | |
61 void FetchScreenInfoOnUIThread(int process_id, int render_view_id); | |
62 void UpdateScreenInfo(int process_id, int render_view_id, | |
63 int viewport_width, int viewport_height, | |
64 float device_pixel_ratio); | |
65 | |
66 ScreenMap screen_hints_; | |
67 | |
68 DISALLOW_COPY_AND_ASSIGN(ClientHints); | |
69 }; | |
70 | |
71 #endif // CHROME_BROWSER_NET_CLIENT_HINTS_H_ | |
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