Index: chrome/browser/net/client_hints.cc |
diff --git a/chrome/browser/net/client_hints.cc b/chrome/browser/net/client_hints.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..1a4a3aa735714837ef582e39fcb3670aa640781f |
--- /dev/null |
+++ b/chrome/browser/net/client_hints.cc |
@@ -0,0 +1,51 @@ |
+// Copyright (c) 2012 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#include "chrome/browser/net/client_hints.h" |
+ |
+#include "base/bind.h" |
+#include "base/stringprintf.h" |
+#include "content/public/browser/browser_thread.h" |
+#include "ui/gfx/screen.h" |
+ |
+using base::Bind; |
+using content::BrowserThread; |
Ryan Sleevi
2013/02/26 02:21:04
These are generally discouraged except when they m
bengr
2013/02/26 18:19:53
Done.
|
+ |
+namespace { |
+typedef base::Callback<void(int, int, float)> ClientHintsCallback; |
Ryan Sleevi
2013/02/26 02:21:04
nit: Unused
bengr
2013/02/26 18:19:53
Done.
|
+ |
+void FetchScreenInfoOnUIThread(ClientHints::ScreenInfo* info) { |
+ DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); |
+ gfx::Display display = gfx::Screen::GetNativeScreen()->GetPrimaryDisplay(); |
+ info->width = display.GetSizeInPixel().width(); |
+ info->height = display.GetSizeInPixel().height(); |
+ info->pixel_ratio = display.device_scale_factor(); |
+} |
+} // namespace |
+ |
+ClientHints::ClientHints() : screen_hints_(""), weak_ptr_factory_(this) { |
+} |
+ |
+ClientHints::~ClientHints() { |
+} |
+ |
+bool ClientHints::RetrieveScreenInfo() { |
+ ClientHints::ScreenInfo* info = new ClientHints::ScreenInfo(); |
+ return BrowserThread::PostTaskAndReply( |
+ BrowserThread::UI, |
+ FROM_HERE, |
+ Bind(&FetchScreenInfoOnUIThread, info), |
+ Bind(&ClientHints::UpdateScreenInfo, weak_ptr_factory_.GetWeakPtr(), |
+ base::Owned(info))); |
+} |
+ |
+std::string ClientHints::GetScreenInfoHints() { |
+ return screen_hints_; |
+} |
+ |
+void ClientHints::UpdateScreenInfo(ClientHints::ScreenInfo* info) { |
+ screen_hints_ = base::StringPrintf( |
+ "dh=%d, dw=%d, dpr=%0.3g", info->height, info->width, info->pixel_ratio); |
+} |
+ |