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      1 /*
      2  * Copyright (C) 2010 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
     14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
     17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     23  * THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef DrawingAreaMessageKinds_h
     27 #define DrawingAreaMessageKinds_h
     28 
     29 #include "MessageID.h"
     30 
     31 // Messages sent from the web process to the UI process.
     32 
     33 namespace DrawingAreaLegacyMessage {
     34 
     35 enum Kind {
     36     // Called whenever the size of the drawing area needs to be updated.
     37     SetSize,
     38 
     39     // Called when the drawing area should stop painting.
     40     SuspendPainting,
     41 
     42     // Called when the drawing area should start painting again.
     43     ResumePainting,
     44 
     45     // Called when an update chunk sent to the drawing area has been
     46     // incorporated into the backing store.
     47     DidUpdate,
     48 
     49 #if ENABLE(TILED_BACKING_STORE)
     50     // Called to request a tile update.
     51     RequestTileUpdate,
     52 
     53     // Called to cancel a requested tile update.
     54     CancelTileUpdate,
     55 
     56     // Called to take a snapshot of the page contents.
     57     TakeSnapshot,
     58 #endif
     59 };
     60 
     61 }
     62 
     63 namespace CoreIPC {
     64 
     65 template<> struct MessageKindTraits<DrawingAreaLegacyMessage::Kind> {
     66     static const MessageClass messageClass = MessageClassDrawingAreaLegacy;
     67 };
     68 
     69 }
     70 
     71 #endif // DrawingAreaMessageKinds_h
     72