Delete WebPluginScrollbar and friends

Source/web/ScrollbarGroup.cpp

-/*
- * 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 "web/ScrollbarGroup.h"
-
-#include "core/frame/FrameView.h"
-#include "platform/scroll/Scrollbar.h"
-#include "platform/scroll/ScrollbarTheme.h"
-#include "public/platform/WebRect.h"
-#include "web/WebPluginScrollbarImpl.h"
-
-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(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;
-}
-
-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;
-}
-
-IntPoint ScrollbarGroup::lastKnownMousePosition() const
-{
-    return m_lastMousePosition;
-}
-
-bool ScrollbarGroup::shouldSuspendScrollAnimations() const
-{
-    return false;
-}
-
-void ScrollbarGroup::scrollbarStyleChanged()
-{
-    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