content/child/npapi/plugin_web_event_converter_mac.h

   1 // Copyright (c) 2010 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 CONTENT_CHILD_NPAPI_PLUGIN_WEB_EVENT_CONVERTER_MAC_H_
   6 #define CONTENT_CHILD_NPAPI_PLUGIN_WEB_EVENT_CONVERTER_MAC_H_
   7
   8 #include "third_party/npapi/bindings/npapi.h"
   9
  10 namespace blink {
  11 class WebInputEvent;
  12 class WebKeyboardEvent;
  13 class WebMouseEvent;
  14 class WebMouseWheelEvent;
  15 }
  16
  17 namespace content {
  18
  19 // Utility class to translating WebInputEvent structs to equivalent structures
  20 // suitable for sending to Mac plugins (via NPP_HandleEvent).
  21 class PluginWebEventConverter {
  22  public:
  23   PluginWebEventConverter();
  24   virtual ~PluginWebEventConverter();
  25
  26   // Initializes a converter for the given web event. Returns false if the event
  27   // could not be converted.
  28   bool InitWithEvent(const blink::WebInputEvent& web_event);
  29
  30   // Returns a pointer to a plugin event--suitable for passing to
  31   // NPP_HandleEvent--corresponding to the the web event this converter was
  32   // created with. The pointer is valid only as long as this object is.
  33   // Returns NULL iff InitWithEvent returned false.
  34   NPCocoaEvent* plugin_event() { return &cocoa_event_; }
  35
  36  private:
  37   // Stores a converted plugin representation of the given web event, suitable
  38   // for returning from plugin_event.
  39   // Returns true if the event was successfully converted.
  40   bool ConvertKeyboardEvent(const blink::WebKeyboardEvent& web_event);
  41   bool ConvertMouseEvent(const blink::WebMouseEvent& web_event);
  42   bool ConvertMouseWheelEvent(const blink::WebMouseWheelEvent& web_event);
  43
  44   // Returns the Cocoa translation of web_event's modifiers.
  45   static NSUInteger CocoaModifiers(const blink::WebInputEvent& web_event);
  46
  47   NPCocoaEvent cocoa_event_;
  48
  49   DISALLOW_COPY_AND_ASSIGN(PluginWebEventConverter);
  50 };
  51
  52 }  // namespace content
  53
  54 #endif  // CONTENT_CHILD_NPAPI_PLUGIN_WEB_EVENT_CONVERTER_MAC_H_