| /* |
| * 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 "ScrollbarGroup.h" |
| |
| #include "WebPluginScrollbarImpl.h" |
| #include "core/frame/FrameView.h" |
| #include "platform/scroll/Scrollbar.h" |
| #include "platform/scroll/ScrollbarTheme.h" |
| #include "public/platform/WebRect.h" |
| |
| using namespace WebCore; |
| |
| namespace blink { |
| |
| ScrollbarGroup::ScrollbarGroup(FrameView* frameView, const IntRect& frameRect) |
| : m_frameView(frameView) |
| , m_frameRect(frameRect) |
| , m_horizontalScrollbar(0) |
| , m_verticalScrollbar(0) |
| { |
| } |
| |
| ScrollbarGroup::~ScrollbarGroup() |
| { |
| ASSERT(!m_horizontalScrollbar); |
| ASSERT(!m_verticalScrollbar); |
| } |
| |
| void ScrollbarGroup::scrollbarCreated(WebPluginScrollbarImpl* scrollbar) |
| { |
| bool hadScrollbars = m_horizontalScrollbar || m_verticalScrollbar; |
| if (scrollbar->scrollbar()->orientation() == HorizontalScrollbar) { |
| ASSERT(!m_horizontalScrollbar); |
| m_horizontalScrollbar = scrollbar; |
| didAddScrollbar(scrollbar->scrollbar(), HorizontalScrollbar); |
| } else { |
| ASSERT(!m_verticalScrollbar); |
| m_verticalScrollbar = scrollbar; |
| didAddScrollbar(scrollbar->scrollbar(), VerticalScrollbar); |
| } |
| |
| if (!hadScrollbars) { |
| m_frameView->addScrollableArea(this); |
| m_frameView->setNeedsLayout(); |
| } |
| } |
| |
| void ScrollbarGroup::scrollbarDestroyed(WebPluginScrollbarImpl* scrollbar) |
| { |
| if (scrollbar == m_horizontalScrollbar) { |
| willRemoveScrollbar(scrollbar->scrollbar(), HorizontalScrollbar); |
| m_horizontalScrollbar = 0; |
| } else { |
| ASSERT(scrollbar == m_verticalScrollbar); |
| willRemoveScrollbar(scrollbar->scrollbar(), VerticalScrollbar); |
| m_verticalScrollbar = 0; |
| } |
| |
| if (!m_horizontalScrollbar && !m_verticalScrollbar) { |
| m_frameView->removeScrollableArea(this); |
| m_frameView->setNeedsLayout(); |
| } |
| } |
| |
| void ScrollbarGroup::setLastMousePosition(const IntPoint& point) |
| { |
| m_lastMousePosition = point; |
| } |
| |
| int ScrollbarGroup::scrollSize(WebCore::ScrollbarOrientation orientation) const |
| { |
| WebPluginScrollbarImpl* webScrollbar = orientation == HorizontalScrollbar ? m_horizontalScrollbar : m_verticalScrollbar; |
| if (!webScrollbar) |
| return 0; |
| Scrollbar* scrollbar = webScrollbar->scrollbar(); |
| return scrollbar->totalSize() - scrollbar->visibleSize(); |
| } |
| |
| void ScrollbarGroup::setScrollOffset(const IntPoint& offset) |
| { |
| if (m_horizontalScrollbar && m_horizontalScrollbar->scrollOffset() != offset.x()) |
| m_horizontalScrollbar->setScrollOffset(offset.x()); |
| else if (m_verticalScrollbar && m_verticalScrollbar->scrollOffset() != offset.y()) |
| m_verticalScrollbar->setScrollOffset(offset.y()); |
| } |
| |
| void ScrollbarGroup::invalidateScrollbarRect(Scrollbar* scrollbar, const IntRect& rect) |
| { |
| if (m_horizontalScrollbar && scrollbar == m_horizontalScrollbar->scrollbar()) |
| m_horizontalScrollbar->invalidateScrollbarRect(rect); |
| else if (m_verticalScrollbar && scrollbar == m_verticalScrollbar->scrollbar()) |
| m_verticalScrollbar->invalidateScrollbarRect(rect); |
| } |
| |
| void ScrollbarGroup::invalidateScrollCornerRect(const IntRect&) |
| { |
| } |
| |
| bool ScrollbarGroup::isActive() const |
| { |
| return true; |
| } |
| |
| ScrollableArea* ScrollbarGroup::enclosingScrollableArea() const |
| { |
| // FIXME: Return a parent scrollable area that can be scrolled. |
| return 0; |
| } |
| |
| void ScrollbarGroup::setFrameRect(const IntRect& frameRect) |
| { |
| m_frameRect = frameRect; |
| } |
| |
| IntRect ScrollbarGroup::scrollableAreaBoundingBox() const |
| { |
| return m_frameRect; |
| } |
| |
| bool ScrollbarGroup::isScrollCornerVisible() const |
| { |
| return false; |
| } |
| |
| void ScrollbarGroup::getTickmarks(Vector<IntRect>& tickmarks) const |
| { |
| if (m_verticalScrollbar) |
| m_verticalScrollbar->getTickmarks(tickmarks); |
| } |
| |
| IntPoint ScrollbarGroup::convertFromContainingViewToScrollbar(const Scrollbar* scrollbar, const IntPoint& parentPoint) const |
| { |
| if (m_horizontalScrollbar && scrollbar == m_horizontalScrollbar->scrollbar()) |
| return m_horizontalScrollbar->convertFromContainingViewToScrollbar(parentPoint); |
| if (m_verticalScrollbar && scrollbar == m_verticalScrollbar->scrollbar()) |
| return m_verticalScrollbar->convertFromContainingViewToScrollbar(parentPoint); |
| BLINK_ASSERT_NOT_REACHED(); |
| return IntPoint(); |
| } |
| |
| Scrollbar* ScrollbarGroup::horizontalScrollbar() const |
| { |
| return m_horizontalScrollbar ? m_horizontalScrollbar->scrollbar() : 0; |
| } |
| |
| Scrollbar* ScrollbarGroup::verticalScrollbar() const |
| { |
| return m_verticalScrollbar ? m_verticalScrollbar->scrollbar() : 0; |
| } |
| |
| IntPoint ScrollbarGroup::scrollPosition() const |
| { |
| int x = m_horizontalScrollbar ? m_horizontalScrollbar->scrollOffset() : 0; |
| int y = m_verticalScrollbar ? m_verticalScrollbar->scrollOffset() : 0; |
| return IntPoint(x, y); |
| } |
| |
| IntPoint ScrollbarGroup::minimumScrollPosition() const |
| { |
| return IntPoint(); |
| } |
| |
| IntPoint ScrollbarGroup::maximumScrollPosition() const |
| { |
| return IntPoint(contentsSize().width() - visibleWidth(), contentsSize().height() - visibleHeight()); |
| } |
| |
| int ScrollbarGroup::visibleHeight() const |
| { |
| if (m_verticalScrollbar) |
| return m_verticalScrollbar->scrollbar()->height(); |
| if (m_horizontalScrollbar) |
| return m_horizontalScrollbar->scrollbar()->height(); |
| BLINK_ASSERT_NOT_REACHED(); |
| return 0; |
| } |
| |
| int ScrollbarGroup::visibleWidth() const |
| { |
| if (m_horizontalScrollbar) |
| return m_horizontalScrollbar->scrollbar()->width(); |
| if (m_verticalScrollbar) |
| return m_verticalScrollbar->scrollbar()->width(); |
| BLINK_ASSERT_NOT_REACHED(); |
| return 0; |
| } |
| |
| IntSize ScrollbarGroup::contentsSize() const |
| { |
| IntSize size; |
| if (m_horizontalScrollbar) |
| size.setWidth(m_horizontalScrollbar->scrollbar()->totalSize()); |
| else if (m_verticalScrollbar) { |
| size.setWidth(m_verticalScrollbar->scrollbar()->x()); |
| if (m_verticalScrollbar->scrollbar()->isOverlayScrollbar()) |
| size.expand(WebPluginScrollbar::defaultThickness(), 0); |
| } |
| if (m_verticalScrollbar) |
| size.setHeight(m_verticalScrollbar->scrollbar()->totalSize()); |
| else if (m_horizontalScrollbar) { |
| size.setHeight(m_horizontalScrollbar->scrollbar()->y()); |
| if (m_horizontalScrollbar->scrollbar()->isOverlayScrollbar()) |
| size.expand(0, WebPluginScrollbar::defaultThickness()); |
| } |
| return size; |
| } |
| |
| IntSize ScrollbarGroup::overhangAmount() const |
| { |
| return IntSize(); |
| } |
| |
| IntPoint ScrollbarGroup::lastKnownMousePosition() const |
| { |
| return m_lastMousePosition; |
| } |
| |
| bool ScrollbarGroup::shouldSuspendScrollAnimations() const |
| { |
| return false; |
| } |
| |
| void ScrollbarGroup::scrollbarStyleChanged(int, bool forceUpdate) |
| { |
| if (!forceUpdate) |
| return; |
| |
| if (m_horizontalScrollbar) |
| m_horizontalScrollbar->scrollbarStyleChanged(); |
| if (m_verticalScrollbar) |
| m_verticalScrollbar->scrollbarStyleChanged(); |
| } |
| |
| bool ScrollbarGroup::scrollbarsCanBeActive() const |
| { |
| return true; |
| } |
| |
| bool ScrollbarGroup::userInputScrollable(ScrollbarOrientation orientation) const |
| { |
| return orientation == HorizontalScrollbar ? horizontalScrollbar() : verticalScrollbar(); |
| } |
| |
| bool ScrollbarGroup::shouldPlaceVerticalScrollbarOnLeft() const |
| { |
| return false; |
| } |
| |
| int ScrollbarGroup::pageStep(ScrollbarOrientation orientation) const |
| { |
| int length; |
| if (orientation == VerticalScrollbar) { |
| if (!m_verticalScrollbar) |
| return 0; |
| |
| length = m_verticalScrollbar->scrollbar()->height(); |
| } else { |
| if (!m_horizontalScrollbar) |
| return 0; |
| |
| length = m_horizontalScrollbar->scrollbar()->width(); |
| } |
| |
| int pageStep = std::max( |
| static_cast<int>(static_cast<float>(length) * ScrollableArea::minFractionToStepWhenPaging()), |
| length - ScrollableArea::maxOverlapBetweenPages()); |
| |
| return std::max(pageStep, 1); |
| } |
| |
| } // namespace blink |