| /* |
| * Copyright (C) 2012 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: |
| * 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. AND ITS 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 APPLE INC. OR ITS 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 "WebPoint.h" |
| #include "WebRect.h" |
| #include "WebScrollbarOverlayColorTheme.h" |
| #include "WebSize.h" |
| #include "WebVector.h" |
| |
| namespace blink { |
| |
| // A const accessor interface for a WebKit scrollbar |
| class BLINK_PLATFORM_EXPORT WebScrollbar { |
| public: |
| enum Orientation { kHorizontal, kVertical }; |
| |
| enum ScrollDirection { kScrollBackward, kScrollForward }; |
| |
| enum ScrollGranularity { |
| kScrollByLine, |
| kScrollByPage, |
| kScrollByDocument, |
| kScrollByPixel |
| }; |
| |
| enum ScrollbarControlSize { kRegularScrollbar, kSmallScrollbar }; |
| |
| enum ScrollbarPart { |
| kNoPart = 0, |
| kBackButtonStartPart = 1, |
| kForwardButtonStartPart = 1 << 1, |
| kBackTrackPart = 1 << 2, |
| kThumbPart = 1 << 3, |
| kForwardTrackPart = 1 << 4, |
| kBackButtonEndPart = 1 << 5, |
| kForwardButtonEndPart = 1 << 6, |
| kScrollbarBGPart = 1 << 7, |
| kTrackBGPart = 1 << 8, |
| kAllParts = 0xffffffff |
| }; |
| |
| enum class ScrollingMode { kAuto, kAlwaysOff, kAlwaysOn, kLast = kAlwaysOn }; |
| |
| virtual ~WebScrollbar() = default; |
| |
| // Return true if this is an overlay scrollbar. |
| virtual bool IsOverlay() const = 0; |
| |
| // Gets the current value (i.e. position inside the region). |
| virtual int Value() const = 0; |
| |
| virtual WebPoint Location() const = 0; |
| virtual WebSize Size() const = 0; |
| virtual bool Enabled() const = 0; |
| virtual int Maximum() const = 0; |
| virtual int TotalSize() const = 0; |
| virtual bool IsScrollableAreaActive() const = 0; |
| virtual bool HasTickmarks() const = 0; |
| virtual void GetTickmarks(WebVector<WebRect>& tickmarks) const = 0; |
| virtual ScrollbarControlSize GetControlSize() const = 0; |
| virtual ScrollbarPart PressedPart() const = 0; |
| virtual ScrollbarPart HoveredPart() const = 0; |
| virtual WebScrollbarOverlayColorTheme ScrollbarOverlayColorTheme() const = 0; |
| virtual bool IsCustomScrollbar() const = 0; |
| virtual Orientation GetOrientation() const = 0; |
| virtual bool IsLeftSideVerticalScrollbar() const = 0; |
| virtual float ElasticOverscroll() const = 0; |
| virtual void SetElasticOverscroll(float) = 0; |
| }; |
| |
| } // namespace blink |
| |
| #endif |