| /* |
| * Copyright (C) 2011 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 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 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. |
| */ |
| |
| #include "config.h" |
| #include "core/platform/chromium/ScrollbarThemeChromiumOverlay.h" |
| |
| #include "core/platform/PlatformMouseEvent.h" |
| #include "core/platform/Scrollbar.h" |
| #include "core/platform/graphics/GraphicsContext.h" |
| #include "core/platform/graphics/transforms/TransformationMatrix.h" |
| |
| #include <algorithm> |
| |
| using namespace std; |
| |
| namespace WebCore { |
| |
| static const int scrollbarWidth = 3; |
| static const int scrollbarMargin = 4; |
| |
| int ScrollbarThemeChromiumOverlay::scrollbarThickness(ScrollbarControlSize controlSize) |
| { |
| return scrollbarWidth + scrollbarMargin; |
| } |
| |
| bool ScrollbarThemeChromiumOverlay::usesOverlayScrollbars() const |
| { |
| return true; |
| } |
| |
| int ScrollbarThemeChromiumOverlay::thumbPosition(ScrollbarThemeClient* scrollbar) |
| { |
| if (!scrollbar->totalSize()) |
| return 0; |
| |
| int trackLen = trackLength(scrollbar); |
| float proportion = static_cast<float>(scrollbar->currentPos()) / scrollbar->totalSize(); |
| return round(proportion * trackLen); |
| } |
| |
| int ScrollbarThemeChromiumOverlay::thumbLength(ScrollbarThemeClient* scrollbar) |
| { |
| int trackLen = trackLength(scrollbar); |
| |
| if (!scrollbar->totalSize()) |
| return trackLen; |
| |
| float proportion = (float)scrollbar->visibleSize() / scrollbar->totalSize(); |
| int length = round(proportion * trackLen); |
| length = min(max(length, minimumThumbLength(scrollbar)), trackLen); |
| return length; |
| } |
| |
| bool ScrollbarThemeChromiumOverlay::hasThumb(ScrollbarThemeClient* scrollbar) |
| { |
| return true; |
| } |
| |
| IntRect ScrollbarThemeChromiumOverlay::backButtonRect(ScrollbarThemeClient*, ScrollbarPart, bool) |
| { |
| return IntRect(); |
| } |
| |
| IntRect ScrollbarThemeChromiumOverlay::forwardButtonRect(ScrollbarThemeClient*, ScrollbarPart, bool) |
| { |
| return IntRect(); |
| } |
| |
| IntRect ScrollbarThemeChromiumOverlay::trackRect(ScrollbarThemeClient* scrollbar, bool) |
| { |
| IntRect rect = scrollbar->frameRect(); |
| if (scrollbar->orientation() == HorizontalScrollbar) |
| rect.inflateX(-scrollbarMargin); |
| else |
| rect.inflateY(-scrollbarMargin); |
| return rect; |
| } |
| |
| void ScrollbarThemeChromiumOverlay::paintThumb(GraphicsContext* context, ScrollbarThemeClient* scrollbar, const IntRect& rect) |
| { |
| IntRect thumbRect = rect; |
| if (scrollbar->orientation() == HorizontalScrollbar) |
| thumbRect.setHeight(thumbRect.height() - scrollbarMargin); |
| else |
| thumbRect.setWidth(thumbRect.width() - scrollbarMargin); |
| context->fillRect(thumbRect, Color(128, 128, 128, 128)); |
| } |
| |
| } // namespace WebCore |