third_party/WebKit/public/platform/WebScrollbarThemeGeometry.h

   1 /*
   2  * Copyright (C) 2012 Google 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  *
   8  * 1.  Redistributions of source code must retain the above copyright
   9  *     notice, this list of conditions and the following disclaimer.
  10  * 2.  Redistributions in binary form must reproduce the above copyright
  11  *     notice, this list of conditions and the following disclaimer in the
  12  *     documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  16  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  17  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  18  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  19  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  20  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  21  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef WebScrollbarThemeGeometry_h
  27 #define WebScrollbarThemeGeometry_h
  28
  29 #include "WebRect.h"
  30
  31 namespace blink {
  32
  33 class WebScrollbar;
  34
  35 class BLINK_PLATFORM_EXPORT WebScrollbarThemeGeometry {
  36 public:
  37     virtual ~WebScrollbarThemeGeometry() { }
  38
  39     virtual WebScrollbarThemeGeometry* clone() const = 0;
  40     virtual int thumbPosition(WebScrollbar*) = 0;
  41     virtual int thumbLength(WebScrollbar*) = 0;
  42     virtual int trackPosition(WebScrollbar*) = 0;
  43     virtual int trackLength(WebScrollbar*) = 0;
  44     virtual bool hasButtons(WebScrollbar*) = 0;
  45     virtual bool hasThumb(WebScrollbar*) = 0;
  46     virtual WebRect trackRect(WebScrollbar*) = 0;
  47     virtual WebRect thumbRect(WebScrollbar*) = 0;
  48     virtual int minimumThumbLength(WebScrollbar*) = 0;
  49     virtual int scrollbarThickness(WebScrollbar*) = 0;
  50     virtual WebRect backButtonStartRect(WebScrollbar*) = 0;
  51     virtual WebRect backButtonEndRect(WebScrollbar*) = 0;
  52     virtual WebRect forwardButtonStartRect(WebScrollbar*) = 0;
  53     virtual WebRect forwardButtonEndRect(WebScrollbar*) = 0;
  54     virtual WebRect constrainTrackRectToTrackPieces(WebScrollbar*, const WebRect&) = 0;
  55     virtual void splitTrack(WebScrollbar*, const WebRect& track, WebRect& startTrack, WebRect& thumb, WebRect& endTrack) = 0;
  56 };
  57
  58 } // namespace blink
  59
  60 #endif