diff -r 000000000000 -r 4f2f89ce4247 WebKit/chromium/public/WebScrollbar.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebKit/chromium/public/WebScrollbar.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2010 Google 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:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "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 THE COPYRIGHT
+ * OWNER 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.
+ */
+
+#ifndef WebScrollbar_h
+#define WebScrollbar_h
+
+#include "WebCanvas.h"
+#include "WebCommon.h"
+
+namespace WebKit {
+
+class WebInputEvent;
+class WebScrollbarClient;
+struct WebRect;
+
+class WebScrollbar {
+public:
+    enum Orientation {
+        Horizontal,
+        Vertical
+    };
+
+    enum ScrollDirection {
+        ScrollBackward,
+        ScrollForward
+    };
+
+    enum ScrollGranularity {
+        ScrollByLine,
+        ScrollByPage,
+        ScrollByDocument,
+        ScrollByPixel
+    };
+
+    // Creates a WebScrollbar.
+    WEBKIT_API static WebScrollbar* create(WebScrollbarClient*, Orientation);
+
+    virtual ~WebScrollbar() {}
+
+    // Gets the thickness of the scrollbar in pixels.
+    WEBKIT_API static int defaultThickness();
+
+    // Sets the rectangle of the scrollbar.
+    virtual void setLocation(const WebRect&) = 0;
+
+    // Gets the current value (i.e. position inside the region).
+    virtual int value() const = 0;
+
+    // Sets the current value.
+    virtual void setValue(int position) = 0;
+
+    // Sets the size of the scrollable region in pixels.  i.e. if a document is
+    // 800x10000 pixels and the viewport is 1000x1000 pixels, then setLocation
+    // for the vertical scrollbar would have passed in a rectangle like:
+    //            (800 - defaultThickness(), 0) (defaultThickness() x 10000)
+    // and setDocumentSize(10000)
+    virtual void setDocumentSize(int size) = 0;
+
+    // Scroll back or forward with the given granularity.
+    virtual void scroll(ScrollDirection, ScrollGranularity, float multiplier) = 0;
+
+    // Paint the given rectangle.
+    virtual void paint(WebCanvas*, const WebRect&) = 0;
+
+    // Returns true iff the given event was used.
+    virtual bool handleInputEvent(const WebInputEvent&) = 0;
+};
+
+} // namespace WebKit
+
+#endif