--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/rendering/RenderScrollbarTheme.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,140 @@
+/*
+ * Copyright (C) 2008 Apple Inc. All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#include "config.h"
+#include "RenderScrollbarTheme.h"
+#include "RenderScrollbar.h"
+#include <wtf/StdLibExtras.h>
+
+namespace WebCore {
+
+RenderScrollbarTheme* RenderScrollbarTheme::renderScrollbarTheme()
+{
+    DEFINE_STATIC_LOCAL(RenderScrollbarTheme, theme, ());
+    return &theme;
+}
+
+void RenderScrollbarTheme::buttonSizesAlongTrackAxis(Scrollbar* scrollbar, int& beforeSize, int& afterSize)
+{
+    IntRect firstButton = backButtonRect(scrollbar, BackButtonStartPart);
+    IntRect secondButton = forwardButtonRect(scrollbar, ForwardButtonStartPart);
+    IntRect thirdButton = backButtonRect(scrollbar, BackButtonEndPart);
+    IntRect fourthButton = forwardButtonRect(scrollbar, ForwardButtonEndPart);
+    if (scrollbar->orientation() == HorizontalScrollbar) {
+        beforeSize = firstButton.width() + secondButton.width();
+        afterSize = thirdButton.width() + fourthButton.width();
+    } else {
+        beforeSize = firstButton.height() + secondButton.height();
+        afterSize = thirdButton.height() + fourthButton.height();
+    }
+}
+
+bool RenderScrollbarTheme::hasButtons(Scrollbar* scrollbar)
+{
+    int startSize;
+    int endSize;
+    buttonSizesAlongTrackAxis(scrollbar, startSize, endSize);
+    return (startSize + endSize) <= (scrollbar->orientation() == HorizontalScrollbar ? scrollbar->width() : scrollbar->height());
+}
+
+bool RenderScrollbarTheme::hasThumb(Scrollbar* scrollbar)
+{
+    return trackLength(scrollbar) - thumbLength(scrollbar) >= 0;
+}
+
+int RenderScrollbarTheme::minimumThumbLength(Scrollbar* scrollbar)
+{
+    return toRenderScrollbar(scrollbar)->minimumThumbLength();
+}
+
+IntRect RenderScrollbarTheme::backButtonRect(Scrollbar* scrollbar, ScrollbarPart partType, bool)
+{
+    return toRenderScrollbar(scrollbar)->buttonRect(partType);
+}
+
+IntRect RenderScrollbarTheme::forwardButtonRect(Scrollbar* scrollbar, ScrollbarPart partType, bool)
+{
+    return toRenderScrollbar(scrollbar)->buttonRect(partType);
+}
+
+IntRect RenderScrollbarTheme::trackRect(Scrollbar* scrollbar, bool)
+{
+    if (!hasButtons(scrollbar))
+        return scrollbar->frameRect();
+    
+    int startLength;
+    int endLength;
+    buttonSizesAlongTrackAxis(scrollbar, startLength, endLength);
+    
+    return toRenderScrollbar(scrollbar)->trackRect(startLength, endLength);
+}
+
+IntRect RenderScrollbarTheme::constrainTrackRectToTrackPieces(Scrollbar* scrollbar, const IntRect& rect)
+{ 
+    IntRect backRect = toRenderScrollbar(scrollbar)->trackPieceRectWithMargins(BackTrackPart, rect);
+    IntRect forwardRect = toRenderScrollbar(scrollbar)->trackPieceRectWithMargins(ForwardTrackPart, rect);
+    IntRect result = rect;
+    if (scrollbar->orientation() == HorizontalScrollbar) {
+        result.setX(backRect.x());
+        result.setWidth(forwardRect.right() - backRect.x());
+    } else {
+        result.setY(backRect.y());
+        result.setHeight(forwardRect.bottom() - backRect.y());
+    }
+    return result;
+}
+
+void RenderScrollbarTheme::paintScrollCorner(ScrollView*, GraphicsContext* context, const IntRect& cornerRect)
+{
+    // FIXME: Implement.
+    context->fillRect(cornerRect, Color::white, DeviceColorSpace);
+}
+
+void RenderScrollbarTheme::paintScrollbarBackground(GraphicsContext* context, Scrollbar* scrollbar)
+{
+    toRenderScrollbar(scrollbar)->paintPart(context, ScrollbarBGPart, scrollbar->frameRect());
+}
+
+void RenderScrollbarTheme::paintTrackBackground(GraphicsContext* context, Scrollbar* scrollbar, const IntRect& rect)
+{
+    toRenderScrollbar(scrollbar)->paintPart(context, TrackBGPart, rect);
+}
+
+void RenderScrollbarTheme::paintTrackPiece(GraphicsContext* context, Scrollbar* scrollbar, const IntRect& rect, ScrollbarPart part)
+{
+    toRenderScrollbar(scrollbar)->paintPart(context, part, rect);
+}
+
+void RenderScrollbarTheme::paintButton(GraphicsContext* context, Scrollbar* scrollbar, const IntRect& rect, ScrollbarPart part)
+{
+    toRenderScrollbar(scrollbar)->paintPart(context, part, rect);
+}
+
+void RenderScrollbarTheme::paintThumb(GraphicsContext* context, Scrollbar* scrollbar, const IntRect& rect)
+{
+    toRenderScrollbar(scrollbar)->paintPart(context, ThumbPart, rect);
+}
+
+}