third_party/WebKit/Source/platform/exported/WebScrollbarThemeGeometryNative.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 WebScrollbarThemeGeometryNative_h
  27 #define WebScrollbarThemeGeometryNative_h
  28
  29 #include "platform/PlatformExport.h"
  30 #include "public/platform/WebRect.h"
  31 #include "public/platform/WebScrollbarThemeGeometry.h"
  32 #include "wtf/PassOwnPtr.h"
  33
  34 namespace blink {
  35
  36 class ScrollbarTheme;
  37 class WebScrollbar;
  38
  39 class PLATFORM_EXPORT WebScrollbarThemeGeometryNative : public WebScrollbarThemeGeometry {
  40 public:
  41     static PassOwnPtr<WebScrollbarThemeGeometryNative> create(ScrollbarTheme*);
  42
  43     // WebScrollbarThemeGeometry overrides
  44     WebScrollbarThemeGeometryNative* clone() const override;
  45     int thumbPosition(WebScrollbar*) override;
  46     int thumbLength(WebScrollbar*) override;
  47     int trackPosition(WebScrollbar*) override;
  48     int trackLength(WebScrollbar*) override;
  49     bool hasButtons(WebScrollbar*) override;
  50     bool hasThumb(WebScrollbar*) override;
  51     WebRect trackRect(WebScrollbar*) override;
  52     WebRect thumbRect(WebScrollbar*) override;
  53     int minimumThumbLength(WebScrollbar*) override;
  54     int scrollbarThickness(WebScrollbar*) override;
  55     WebRect backButtonStartRect(WebScrollbar*) override;
  56     WebRect backButtonEndRect(WebScrollbar*) override;
  57     WebRect forwardButtonStartRect(WebScrollbar*) override;
  58     WebRect forwardButtonEndRect(WebScrollbar*) override;
  59     WebRect constrainTrackRectToTrackPieces(WebScrollbar*, const WebRect&) override;
  60     void splitTrack(WebScrollbar*, const WebRect& track, WebRect& startTrack, WebRect& thumb, WebRect& endTrack) override;
  61
  62 private:
  63     explicit WebScrollbarThemeGeometryNative(ScrollbarTheme*);
  64
  65     // The theme is not owned by this class. It is assumed that the theme is a
  66     // static pointer and its lifetime is essentially infinite. Only thread-safe
  67     // functions on the theme can be called by this theme.
  68     ScrollbarTheme* m_theme;
  69 };
  70
  71 } // namespace blink
  72
  73 #endif