Zoom Extension API (content changes)

content/public/browser/host_zoom_map.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_HOST_ZOOM_MAP_H_
 #define CONTENT_PUBLIC_BROWSER_HOST_ZOOM_MAP_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 60 matching lines @@
   // Here |host| is the host portion of URL, or (in the absence of a host)
   // the complete spec of the URL.
   // Returns the zoom for the specified |scheme| and |host|. See class
   // description for details.
   //
   // This may be called on any thread.
   virtual double GetZoomLevelForHostAndScheme(
       const std::string& scheme,
       const std::string& host) const = 0;
 
-  // Returns all non-temporary zoom levels. Can only be called on any thread.
+  // Returns true if the specified |scheme| and/or |host| has a zoom level
+  // currently set.
+  //
+  // This may be called on any thread.
+  virtual bool HasZoomLevel(const std::string& scheme,
+                            const std::string& host) const = 0;
+
+  // Returns all non-temporary zoom levels. Can be called on any thread.
   virtual ZoomLevelVector GetAllZoomLevels() const = 0;
 
   // Here |host| is the host portion of URL, or (in the absence of a host)
   // the complete spec of the URL.
   // Sets the zoom level for the |host| to |level|.  If the level matches the
   // current default zoom level, the host is erased from the saved preferences;
   // otherwise the new value is written out.
   // Zoom levels specified for both scheme and host are not affected.
   //
   // This should only be called on the UI thread.
   virtual void SetZoomLevelForHost(const std::string& host, double level) = 0;
 
   // Here |host| is the host portion of URL, or (in the absence of a host)
   // the complete spec of the URL.
   // Sets the zoom level for the |scheme|/|host| pair to |level|. No values
   // will be erased during this operation, and this value will not be stored in
   // the preferences.
   //
   // This should only be called on the UI thread.
   virtual void SetZoomLevelForHostAndScheme(const std::string& scheme,
                                             const std::string& host,
                                             double level) = 0;
 
+  // Returns whether the view manages its zoom level independently of other
+  // views displaying content from the same host.
+  virtual bool UsesTemporaryZoomLevel(int render_process_id,
+                                      int render_view_id) const = 0;
+
+  // Sets the temporary zoom level that's only valid for the lifetime of this
+  // WebContents.
+  //
+  // This should only be called on the UI thread.
+  virtual void SetTemporaryZoomLevel(int render_process_id,
+                                     int render_view_id,
+                                     double level) = 0;
+
+  // Clears the temporary zoom level stored for this WebContents.
+  //
+  // This should only be called on the UI thread.
+  virtual void ClearTemporaryZoomLevel(int render_process_id,
+                                       int render_view_id) = 0;
+
   // Get/Set the default zoom level for pages that don't override it.
   virtual double GetDefaultZoomLevel() const = 0;
   virtual void SetDefaultZoomLevel(double level) = 0;;
 
   typedef base::Callback<void(const ZoomLevelChange&)> ZoomLevelChangedCallback;
   typedef base::CallbackList<void(const ZoomLevelChange&)>::Subscription
       Subscription;
   // Add and remove zoom level changed callbacks.
   virtual scoped_ptr<Subscription> AddZoomLevelChangedCallback(
       const ZoomLevelChangedCallback& callback) = 0;
 
  protected:
   virtual ~HostZoomMap() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_HOST_ZOOM_MAP_H_