Index: chrome/browser/host_zoom_map.h |
=================================================================== |
--- chrome/browser/host_zoom_map.h (revision 0) |
+++ chrome/browser/host_zoom_map.h (revision 0) |
@@ -0,0 +1,60 @@ |
+// Copyright (c) 2009 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. |
+ |
+// Maps hostnames to custom zoom levels. Written on the UI thread and read on |
+// the IO thread. One instance per profile. |
+ |
+#ifndef CHROME_BROWSER_HOST_ZOOM_MAP_H_ |
+#define CHROME_BROWSER_HOST_ZOOM_MAP_H_ |
+ |
+#include <map> |
+#include <string> |
+ |
+#include "base/basictypes.h" |
+#include "base/lock.h" |
+#include "base/ref_counted.h" |
+ |
+class PrefService; |
+class Profile; |
+ |
+class HostZoomMap : public base::RefCountedThreadSafe<HostZoomMap> { |
+ public: |
+ explicit HostZoomMap(Profile* profile); |
+ |
+ static void RegisterUserPrefs(PrefService* prefs); |
+ |
+ // Returns the zoom level for a given hostname. In most cases, there is no |
+ // custom zoom level, and this returns 0. Otherwise, returns the saved zoom |
+ // level, which may be positive (to zoom in) or negative (to zoom out). |
+ // |
+ // This may be called on any thread. |
+ int GetZoomLevel(const std::string& host) const; |
+ |
+ // Sets the zoom level for a given hostname to |level|. If the level is 0, |
+ // the host is erased from the saved preferences; otherwise the new value is |
+ // written out. |
+ // |
+ // This should only be called on the UI thread. |
+ void SetZoomLevel(const std::string& host, int level); |
+ |
+ private: |
+ friend class base::RefCountedThreadSafe<HostZoomMap>; |
+ |
+ typedef std::map<std::string, int> HostZoomLevels; |
+ |
+ ~HostZoomMap(); |
+ |
+ // The profile we're associated with. |
+ Profile* profile_; |
+ |
+ // Copy of the pref data, so that we can read it on the IO thread. |
+ HostZoomLevels host_zoom_levels_; |
+ |
+ // Used around accesses to |host_zoom_levels_| to guarantee thread safety. |
+ mutable Lock lock_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(HostZoomMap); |
+}; |
+ |
+#endif // CHROME_BROWSER_HOST_ZOOM_MAP_H_ |
Property changes on: chrome\browser\host_zoom_map.h |
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Added: svn:eol-style |
+ LF |