code.vuplus.com Git - vuplus_webkit/blob - Source/WebCore/platform/chromium/ScrollbarThemeChromiumLinux.cpp

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  30
  31 #include "config.h"
  32 #include "ScrollbarThemeChromiumLinux.h"
  33
  34 #include "PlatformSupport.h"
  35 #include "PlatformMouseEvent.h"
  36 #include "Scrollbar.h"
  37
  38 namespace WebCore {
  39
  40 ScrollbarTheme* ScrollbarTheme::nativeTheme()
  41 {
  42     static ScrollbarThemeChromiumLinux theme;
  43     return &theme;
  44 }
  45
  46 int ScrollbarThemeChromiumLinux::scrollbarThickness(ScrollbarControlSize controlSize)
  47 {
  48     // Horiz and Vert scrollbars are the same thickness.
  49     IntSize scrollbarSize = PlatformSupport::getThemePartSize(PlatformSupport::PartScrollbarVerticalTrack);
  50     return scrollbarSize.width();
  51 }
  52
  53 void ScrollbarThemeChromiumLinux::paintTrackPiece(GraphicsContext* gc, Scrollbar* scrollbar, const IntRect& rect, ScrollbarPart partType)
  54 {
  55     PlatformSupport::ThemePaintState state = scrollbar->hoveredPart() == partType ? PlatformSupport::StateHover : PlatformSupport::StateNormal;
  56     IntRect alignRect = trackRect(scrollbar, false);
  57     PlatformSupport::ThemePaintExtraParams extraParams;
  58     extraParams.scrollbarTrack.trackX = alignRect.x();
  59     extraParams.scrollbarTrack.trackY = alignRect.y();
  60     extraParams.scrollbarTrack.trackWidth = alignRect.width();
  61     extraParams.scrollbarTrack.trackHeight = alignRect.height();
  62     PlatformSupport::paintThemePart(
  63         gc,
  64         scrollbar->orientation() == HorizontalScrollbar ? PlatformSupport::PartScrollbarHorizontalTrack : PlatformSupport::PartScrollbarVerticalTrack,
  65         state,
  66         rect,
  67         &extraParams);
  68 }
  69
  70 void ScrollbarThemeChromiumLinux::paintButton(GraphicsContext* gc, Scrollbar* scrollbar, const IntRect& rect, ScrollbarPart part)
  71 {
  72     PlatformSupport::ThemePart paintPart;
  73     PlatformSupport::ThemePaintState state = PlatformSupport::StateNormal;
  74     bool checkMin = false;
  75     bool checkMax = false;
  76     if (scrollbar->orientation() == HorizontalScrollbar) {
  77         if (part == BackButtonStartPart) {
  78             paintPart = PlatformSupport::PartScrollbarLeftArrow;
  79             checkMin = true;
  80         } else {
  81             paintPart = PlatformSupport::PartScrollbarRightArrow;
  82             checkMax = true;
  83         }
  84     } else {
  85         if (part == BackButtonStartPart) {
  86             paintPart = PlatformSupport::PartScrollbarUpArrow;
  87             checkMin = true;
  88         } else {
  89             paintPart = PlatformSupport::PartScrollbarDownArrow;
  90             checkMax = true;
  91         }
  92     }
  93     if ((checkMin && (scrollbar->currentPos() <= 0))
  94         || (checkMax && scrollbar->currentPos() == scrollbar->maximum())) {
  95         state = PlatformSupport::StateDisabled;
  96     } else {
  97         if (part == scrollbar->pressedPart())
  98             state = PlatformSupport::StatePressed;
  99         else if (part == scrollbar->hoveredPart())
 100             state = PlatformSupport::StateHover;
 101     }
 102     PlatformSupport::paintThemePart(gc, paintPart, state, rect, 0);
 103 }
 104
 105 void ScrollbarThemeChromiumLinux::paintThumb(GraphicsContext* gc, Scrollbar* scrollbar, const IntRect& rect)
 106 {
 107     PlatformSupport::ThemePaintState state;
 108
 109     if (scrollbar->pressedPart() == ThumbPart)
 110         state = PlatformSupport::StatePressed;
 111     else if (scrollbar->hoveredPart() == ThumbPart)
 112         state = PlatformSupport::StateHover;
 113     else
 114         state = PlatformSupport::StateNormal;
 115     PlatformSupport::paintThemePart(
 116         gc,
 117         scrollbar->orientation() == HorizontalScrollbar ? PlatformSupport::PartScrollbarHorizontalThumb : PlatformSupport::PartScrollbarVerticalThumb,
 118         state,
 119         rect,
 120         0);
 121 }
 122
 123 bool ScrollbarThemeChromiumLinux::shouldCenterOnThumb(Scrollbar*, const PlatformMouseEvent& evt)
 124 {
 125     return (evt.shiftKey() && evt.button() == LeftButton) || (evt.button() == MiddleButton);
 126 }
 127
 128 IntSize ScrollbarThemeChromiumLinux::buttonSize(Scrollbar* scrollbar)
 129 {
 130     if (scrollbar->orientation() == VerticalScrollbar) {
 131         IntSize size = PlatformSupport::getThemePartSize(PlatformSupport::PartScrollbarUpArrow);
 132         return IntSize(size.width(), scrollbar->height() < 2 * size.height() ? scrollbar->height() / 2 : size.height());
 133     }
 134
 135     // HorizontalScrollbar
 136     IntSize size = PlatformSupport::getThemePartSize(PlatformSupport::PartScrollbarLeftArrow);
 137     return IntSize(scrollbar->width() < 2 * size.width() ? scrollbar->width() / 2 : size.width(), size.height());
 138 }
 139
 140 int ScrollbarThemeChromiumLinux::minimumThumbLength(Scrollbar* scrollbar)
 141 {
 142     if (scrollbar->orientation() == VerticalScrollbar) {
 143         IntSize size = PlatformSupport::getThemePartSize(PlatformSupport::PartScrollbarVerticalThumb);
 144         return size.height();
 145     }
 146
 147     IntSize size = PlatformSupport::getThemePartSize(PlatformSupport::PartScrollbarHorizontalThumb);
 148     return size.width();
 149 }
 150
 151 } // namespace WebCore