| /* |
| * 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 "platform/scroll/ScrollbarThemeOverlay.h" |
| |
| #include "platform/PlatformMouseEvent.h" |
| #include "platform/graphics/GraphicsContext.h" |
| #include "platform/scroll/ScrollbarThemeClient.h" |
| #include "platform/transforms/TransformationMatrix.h" |
| #include "public/platform/Platform.h" |
| #include "public/platform/WebRect.h" |
| #include "public/platform/WebThemeEngine.h" |
| |
| #include <algorithm> |
| |
| using namespace std; |
| |
| namespace blink { |
| |
| ScrollbarThemeOverlay::ScrollbarThemeOverlay(int thumbThickness, int scrollbarMargin, HitTestBehavior allowHitTest, Color color) |
| : ScrollbarTheme() |
| , m_thumbThickness(thumbThickness) |
| , m_scrollbarMargin(scrollbarMargin) |
| , m_allowHitTest(allowHitTest) |
| , m_color(color) |
| , m_useSolidColor(true) |
| { |
| } |
| |
| ScrollbarThemeOverlay::ScrollbarThemeOverlay(int thumbThickness, int scrollbarMargin, HitTestBehavior allowHitTest) |
| : ScrollbarTheme() |
| , m_thumbThickness(thumbThickness) |
| , m_scrollbarMargin(scrollbarMargin) |
| , m_allowHitTest(allowHitTest) |
| , m_useSolidColor(false) |
| { |
| } |
| |
| int ScrollbarThemeOverlay::scrollbarThickness(ScrollbarControlSize controlSize) |
| { |
| return m_thumbThickness + m_scrollbarMargin; |
| } |
| |
| bool ScrollbarThemeOverlay::usesOverlayScrollbars() const |
| { |
| return true; |
| } |
| |
| int ScrollbarThemeOverlay::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 ScrollbarThemeOverlay::thumbLength(ScrollbarThemeClient* scrollbar) |
| { |
| int trackLen = trackLength(scrollbar); |
| |
| if (!scrollbar->totalSize()) |
| return trackLen; |
| |
| float proportion = static_cast<float>(scrollbar->visibleSize()) / scrollbar->totalSize(); |
| int length = round(proportion * trackLen); |
| length = min(max(length, minimumThumbLength(scrollbar)), trackLen); |
| return length; |
| } |
| |
| bool ScrollbarThemeOverlay::hasThumb(ScrollbarThemeClient* scrollbar) |
| { |
| return true; |
| } |
| |
| IntRect ScrollbarThemeOverlay::backButtonRect(ScrollbarThemeClient*, ScrollbarPart, bool) |
| { |
| return IntRect(); |
| } |
| |
| IntRect ScrollbarThemeOverlay::forwardButtonRect(ScrollbarThemeClient*, ScrollbarPart, bool) |
| { |
| return IntRect(); |
| } |
| |
| IntRect ScrollbarThemeOverlay::trackRect(ScrollbarThemeClient* scrollbar, bool) |
| { |
| IntRect rect = scrollbar->frameRect(); |
| if (scrollbar->orientation() == HorizontalScrollbar) |
| rect.inflateX(-m_scrollbarMargin); |
| else |
| rect.inflateY(-m_scrollbarMargin); |
| return rect; |
| } |
| |
| int ScrollbarThemeOverlay::thumbThickness(ScrollbarThemeClient*) |
| { |
| return m_thumbThickness; |
| } |
| |
| void ScrollbarThemeOverlay::paintThumb(GraphicsContext* context, ScrollbarThemeClient* scrollbar, const IntRect& rect) |
| { |
| IntRect thumbRect = rect; |
| if (scrollbar->orientation() == HorizontalScrollbar) { |
| thumbRect.setHeight(thumbRect.height() - m_scrollbarMargin); |
| } else { |
| thumbRect.setWidth(thumbRect.width() - m_scrollbarMargin); |
| if (scrollbar->isLeftSideVerticalScrollbar()) |
| thumbRect.setX(thumbRect.x() + m_scrollbarMargin); |
| } |
| |
| if (m_useSolidColor) { |
| context->fillRect(thumbRect, m_color); |
| return; |
| } |
| |
| blink::WebThemeEngine::State state = blink::WebThemeEngine::StateNormal; |
| if (scrollbar->pressedPart() == ThumbPart) |
| state = blink::WebThemeEngine::StatePressed; |
| else if (scrollbar->hoveredPart() == ThumbPart) |
| state = blink::WebThemeEngine::StateHover; |
| |
| blink::WebCanvas* canvas = context->canvas(); |
| |
| blink::WebThemeEngine::Part part = blink::WebThemeEngine::PartScrollbarHorizontalThumb; |
| if (scrollbar->orientation() == VerticalScrollbar) |
| part = blink::WebThemeEngine::PartScrollbarVerticalThumb; |
| |
| blink::Platform::current()->themeEngine()->paint(canvas, part, state, blink::WebRect(rect), 0); |
| } |
| |
| ScrollbarPart ScrollbarThemeOverlay::hitTest(ScrollbarThemeClient* scrollbar, const IntPoint& position) |
| { |
| if (m_allowHitTest == DisallowHitTest) |
| return NoPart; |
| |
| return ScrollbarTheme::hitTest(scrollbar, position); |
| } |
| |
| } // namespace blink |