2 * Copyright (C) 2011 Google Inc. All rights reserved.
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5 * modification, are permitted provided that the following conditions
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14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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27 #include "web/ScrollbarGroup.h"
29 #include "core/frame/FrameView.h"
30 #include "platform/scroll/Scrollbar.h"
31 #include "platform/scroll/ScrollbarTheme.h"
32 #include "public/platform/WebRect.h"
33 #include "web/WebPluginScrollbarImpl.h"
35 using namespace WebCore;
39 ScrollbarGroup::ScrollbarGroup(FrameView* frameView, const IntRect& frameRect)
40 : m_frameView(frameView)
41 , m_frameRect(frameRect)
42 , m_horizontalScrollbar(0)
43 , m_verticalScrollbar(0)
47 ScrollbarGroup::~ScrollbarGroup()
49 ASSERT(!m_horizontalScrollbar);
50 ASSERT(!m_verticalScrollbar);
53 void ScrollbarGroup::scrollbarCreated(WebPluginScrollbarImpl* scrollbar)
55 bool hadScrollbars = m_horizontalScrollbar || m_verticalScrollbar;
56 if (scrollbar->scrollbar()->orientation() == HorizontalScrollbar) {
57 ASSERT(!m_horizontalScrollbar);
58 m_horizontalScrollbar = scrollbar;
59 didAddScrollbar(scrollbar->scrollbar(), HorizontalScrollbar);
61 ASSERT(!m_verticalScrollbar);
62 m_verticalScrollbar = scrollbar;
63 didAddScrollbar(scrollbar->scrollbar(), VerticalScrollbar);
67 m_frameView->addScrollableArea(this);
68 m_frameView->setNeedsLayout();
72 void ScrollbarGroup::scrollbarDestroyed(WebPluginScrollbarImpl* scrollbar)
74 if (scrollbar == m_horizontalScrollbar) {
75 willRemoveScrollbar(scrollbar->scrollbar(), HorizontalScrollbar);
76 m_horizontalScrollbar = 0;
78 ASSERT(scrollbar == m_verticalScrollbar);
79 willRemoveScrollbar(scrollbar->scrollbar(), VerticalScrollbar);
80 m_verticalScrollbar = 0;
83 if (!m_horizontalScrollbar && !m_verticalScrollbar) {
84 m_frameView->removeScrollableArea(this);
85 m_frameView->setNeedsLayout();
89 void ScrollbarGroup::setLastMousePosition(const IntPoint& point)
91 m_lastMousePosition = point;
94 int ScrollbarGroup::scrollSize(WebCore::ScrollbarOrientation orientation) const
96 WebPluginScrollbarImpl* webScrollbar = orientation == HorizontalScrollbar ? m_horizontalScrollbar : m_verticalScrollbar;
99 Scrollbar* scrollbar = webScrollbar->scrollbar();
100 return scrollbar->totalSize() - scrollbar->visibleSize();
103 void ScrollbarGroup::setScrollOffset(const IntPoint& offset)
105 if (m_horizontalScrollbar && m_horizontalScrollbar->scrollOffset() != offset.x())
106 m_horizontalScrollbar->setScrollOffset(offset.x());
107 else if (m_verticalScrollbar && m_verticalScrollbar->scrollOffset() != offset.y())
108 m_verticalScrollbar->setScrollOffset(offset.y());
111 void ScrollbarGroup::invalidateScrollbarRect(Scrollbar* scrollbar, const IntRect& rect)
113 if (m_horizontalScrollbar && scrollbar == m_horizontalScrollbar->scrollbar())
114 m_horizontalScrollbar->invalidateScrollbarRect(rect);
115 else if (m_verticalScrollbar && scrollbar == m_verticalScrollbar->scrollbar())
116 m_verticalScrollbar->invalidateScrollbarRect(rect);
119 void ScrollbarGroup::invalidateScrollCornerRect(const IntRect&)
123 bool ScrollbarGroup::isActive() const
128 void ScrollbarGroup::setFrameRect(const IntRect& frameRect)
130 m_frameRect = frameRect;
133 IntRect ScrollbarGroup::scrollableAreaBoundingBox() const
138 bool ScrollbarGroup::isScrollCornerVisible() const
143 void ScrollbarGroup::getTickmarks(Vector<IntRect>& tickmarks) const
145 if (m_verticalScrollbar)
146 m_verticalScrollbar->getTickmarks(tickmarks);
149 IntPoint ScrollbarGroup::convertFromContainingViewToScrollbar(const Scrollbar* scrollbar, const IntPoint& parentPoint) const
151 if (m_horizontalScrollbar && scrollbar == m_horizontalScrollbar->scrollbar())
152 return m_horizontalScrollbar->convertFromContainingViewToScrollbar(parentPoint);
153 if (m_verticalScrollbar && scrollbar == m_verticalScrollbar->scrollbar())
154 return m_verticalScrollbar->convertFromContainingViewToScrollbar(parentPoint);
155 BLINK_ASSERT_NOT_REACHED();
159 Scrollbar* ScrollbarGroup::horizontalScrollbar() const
161 return m_horizontalScrollbar ? m_horizontalScrollbar->scrollbar() : 0;
164 Scrollbar* ScrollbarGroup::verticalScrollbar() const
166 return m_verticalScrollbar ? m_verticalScrollbar->scrollbar() : 0;
169 IntPoint ScrollbarGroup::scrollPosition() const
171 int x = m_horizontalScrollbar ? m_horizontalScrollbar->scrollOffset() : 0;
172 int y = m_verticalScrollbar ? m_verticalScrollbar->scrollOffset() : 0;
173 return IntPoint(x, y);
176 IntPoint ScrollbarGroup::minimumScrollPosition() const
181 IntPoint ScrollbarGroup::maximumScrollPosition() const
183 return IntPoint(contentsSize().width() - visibleWidth(), contentsSize().height() - visibleHeight());
186 int ScrollbarGroup::visibleHeight() const
188 if (m_verticalScrollbar)
189 return m_verticalScrollbar->scrollbar()->height();
190 if (m_horizontalScrollbar)
191 return m_horizontalScrollbar->scrollbar()->height();
192 BLINK_ASSERT_NOT_REACHED();
196 int ScrollbarGroup::visibleWidth() const
198 if (m_horizontalScrollbar)
199 return m_horizontalScrollbar->scrollbar()->width();
200 if (m_verticalScrollbar)
201 return m_verticalScrollbar->scrollbar()->width();
202 BLINK_ASSERT_NOT_REACHED();
206 IntSize ScrollbarGroup::contentsSize() const
209 if (m_horizontalScrollbar)
210 size.setWidth(m_horizontalScrollbar->scrollbar()->totalSize());
211 else if (m_verticalScrollbar) {
212 size.setWidth(m_verticalScrollbar->scrollbar()->x());
213 if (m_verticalScrollbar->scrollbar()->isOverlayScrollbar())
214 size.expand(WebPluginScrollbar::defaultThickness(), 0);
216 if (m_verticalScrollbar)
217 size.setHeight(m_verticalScrollbar->scrollbar()->totalSize());
218 else if (m_horizontalScrollbar) {
219 size.setHeight(m_horizontalScrollbar->scrollbar()->y());
220 if (m_horizontalScrollbar->scrollbar()->isOverlayScrollbar())
221 size.expand(0, WebPluginScrollbar::defaultThickness());
226 IntSize ScrollbarGroup::overhangAmount() const
231 IntPoint ScrollbarGroup::lastKnownMousePosition() const
233 return m_lastMousePosition;
236 bool ScrollbarGroup::shouldSuspendScrollAnimations() const
241 void ScrollbarGroup::scrollbarStyleChanged()
243 if (m_horizontalScrollbar)
244 m_horizontalScrollbar->scrollbarStyleChanged();
245 if (m_verticalScrollbar)
246 m_verticalScrollbar->scrollbarStyleChanged();
249 bool ScrollbarGroup::scrollbarsCanBeActive() const
254 bool ScrollbarGroup::userInputScrollable(ScrollbarOrientation orientation) const
256 return orientation == HorizontalScrollbar ? horizontalScrollbar() : verticalScrollbar();
259 bool ScrollbarGroup::shouldPlaceVerticalScrollbarOnLeft() const
264 int ScrollbarGroup::pageStep(ScrollbarOrientation orientation) const
267 if (orientation == VerticalScrollbar) {
268 if (!m_verticalScrollbar)
271 length = m_verticalScrollbar->scrollbar()->height();
273 if (!m_horizontalScrollbar)
276 length = m_horizontalScrollbar->scrollbar()->width();
279 int pageStep = std::max(
280 static_cast<int>(static_cast<float>(length) * ScrollableArea::minFractionToStepWhenPaging()),
281 length - ScrollableArea::maxOverlapBetweenPages());
283 return std::max(pageStep, 1);