| /* |
| * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved. |
| * |
| * Portions are Copyright (C) 1998 Netscape Communications Corporation. |
| * |
| * Other contributors: |
| * Robert O'Callahan <roc+@cs.cmu.edu> |
| * David Baron <dbaron@fas.harvard.edu> |
| * Christian Biesinger <cbiesinger@web.de> |
| * Randall Jesup <rjesup@wgate.com> |
| * Roland Mainz <roland.mainz@informatik.med.uni-giessen.de> |
| * Josh Soref <timeless@mac.com> |
| * Boris Zbarsky <bzbarsky@mit.edu> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| * |
| * Alternatively, the contents of this file may be used under the terms |
| * of either the Mozilla Public License Version 1.1, found at |
| * http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public |
| * License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html |
| * (the "GPL"), in which case the provisions of the MPL or the GPL are |
| * applicable instead of those above. If you wish to allow use of your |
| * version of this file only under the terms of one of those two |
| * licenses (the MPL or the GPL) and not to allow others to use your |
| * version of this file under the LGPL, indicate your decision by |
| * deletingthe provisions above and replace them with the notice and |
| * other provisions required by the MPL or the GPL, as the case may be. |
| * If you do not delete the provisions above, a recipient may use your |
| * version of this file under any of the LGPL, the MPL or the GPL. |
| */ |
| |
| #ifndef RenderLayerScrollableArea_h |
| #define RenderLayerScrollableArea_h |
| |
| #include "core/platform/ScrollableArea.h" |
| |
| namespace WebCore { |
| |
| enum ResizerHitTestType { |
| ResizerForPointer, |
| ResizerForTouch |
| }; |
| |
| enum ScrollOffsetClamping { |
| ScrollOffsetUnclamped, |
| ScrollOffsetClamped |
| }; |
| |
| class RenderLayer; |
| class RenderLayerModelObject; |
| |
| class RenderLayerScrollableArea FINAL : public ScrollableArea { |
| // FIXME: Remove once the bits from RenderLayer have been moved here. |
| friend class RenderLayer; |
| public: |
| RenderLayerScrollableArea(RenderLayer*); |
| virtual ~RenderLayerScrollableArea(); |
| |
| virtual Scrollbar* horizontalScrollbar() const OVERRIDE { return m_hBar.get(); } |
| virtual Scrollbar* verticalScrollbar() const OVERRIDE { return m_vBar.get(); } |
| virtual ScrollableArea* enclosingScrollableArea() const OVERRIDE; |
| |
| virtual void updateNeedsCompositedScrolling() OVERRIDE; |
| |
| virtual GraphicsLayer* layerForScrolling() const OVERRIDE; |
| virtual GraphicsLayer* layerForHorizontalScrollbar() const OVERRIDE; |
| virtual GraphicsLayer* layerForVerticalScrollbar() const OVERRIDE; |
| virtual GraphicsLayer* layerForScrollCorner() const OVERRIDE; |
| virtual bool usesCompositedScrolling() const OVERRIDE; |
| virtual void invalidateScrollbarRect(Scrollbar*, const IntRect&) OVERRIDE; |
| virtual void invalidateScrollCornerRect(const IntRect&) OVERRIDE; |
| virtual bool isActive() const OVERRIDE; |
| virtual bool isScrollCornerVisible() const OVERRIDE; |
| virtual IntRect scrollCornerRect() const OVERRIDE; |
| virtual IntRect convertFromScrollbarToContainingView(const Scrollbar*, const IntRect&) const OVERRIDE; |
| virtual IntRect convertFromContainingViewToScrollbar(const Scrollbar*, const IntRect&) const OVERRIDE; |
| virtual IntPoint convertFromScrollbarToContainingView(const Scrollbar*, const IntPoint&) const OVERRIDE; |
| virtual IntPoint convertFromContainingViewToScrollbar(const Scrollbar*, const IntPoint&) const OVERRIDE; |
| virtual int scrollSize(ScrollbarOrientation) const OVERRIDE; |
| virtual void setScrollOffset(const IntPoint&) OVERRIDE; |
| virtual IntPoint scrollPosition() const OVERRIDE; |
| virtual IntPoint minimumScrollPosition() const OVERRIDE; |
| virtual IntPoint maximumScrollPosition() const OVERRIDE; |
| virtual IntRect visibleContentRect(VisibleContentRectIncludesScrollbars) const OVERRIDE; |
| virtual int visibleHeight() const OVERRIDE; |
| virtual int visibleWidth() const OVERRIDE; |
| virtual IntSize contentsSize() const OVERRIDE; |
| virtual IntSize overhangAmount() const OVERRIDE; |
| virtual IntPoint lastKnownMousePosition() const OVERRIDE; |
| virtual bool shouldSuspendScrollAnimations() const OVERRIDE; |
| virtual bool scrollbarsCanBeActive() const OVERRIDE; |
| virtual IntRect scrollableAreaBoundingBox() const OVERRIDE; |
| virtual bool userInputScrollable(ScrollbarOrientation) const OVERRIDE; |
| virtual bool shouldPlaceVerticalScrollbarOnLeft() const OVERRIDE; |
| virtual int pageStep(ScrollbarOrientation) const OVERRIDE; |
| |
| int scrollXOffset() const { return m_scrollOffset.width() + scrollOrigin().x(); } |
| int scrollYOffset() const { return m_scrollOffset.height() + scrollOrigin().y(); } |
| |
| IntSize scrollOffset() const { return m_scrollOffset; } |
| |
| // FIXME: We shouldn't allow access to m_overflowRect outside this class. |
| LayoutRect overflowRect() const { return m_overflowRect; } |
| |
| void scrollToOffset(const IntSize& scrollOffset, ScrollOffsetClamping = ScrollOffsetUnclamped); |
| |
| void updateAfterLayout(); |
| void updateAfterStyleChange(const RenderStyle*); |
| |
| bool hasScrollbar() { return m_hBar || m_vBar; } |
| |
| private: |
| bool hasHorizontalOverflow() const; |
| bool hasVerticalOverflow() const; |
| bool hasScrollableHorizontalOverflow() const; |
| bool hasScrollableVerticalOverflow() const; |
| |
| int scrollWidth() const; |
| int scrollHeight() const; |
| |
| void computeScrollDimensions(); |
| |
| IntSize clampScrollOffset(const IntSize&) const; |
| IntSize adjustedScrollOffset() const { return IntSize(scrollXOffset(), scrollYOffset()); } |
| |
| void setScrollOffset(const IntSize& scrollOffset) { m_scrollOffset = scrollOffset; } |
| |
| IntRect rectForHorizontalScrollbar(const IntRect& borderBoxRect) const; |
| IntRect rectForVerticalScrollbar(const IntRect& borderBoxRect) const; |
| LayoutUnit verticalScrollbarStart(int minX, int maxX) const; |
| LayoutUnit horizontalScrollbarStart(int minX) const; |
| IntSize scrollbarOffset(const Scrollbar*) const; |
| |
| PassRefPtr<Scrollbar> createScrollbar(ScrollbarOrientation); |
| void destroyScrollbar(ScrollbarOrientation); |
| |
| bool hasHorizontalScrollbar() const { return horizontalScrollbar(); } |
| bool hasVerticalScrollbar() const { return verticalScrollbar(); } |
| |
| void setHasHorizontalScrollbar(bool hasScrollbar); |
| void setHasVerticalScrollbar(bool hasScrollbar); |
| |
| int verticalScrollbarWidth(OverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize) const; |
| int horizontalScrollbarHeight(OverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize) const; |
| |
| void positionOverflowControls(const IntSize& offsetFromRoot); |
| void paintOverflowControls(GraphicsContext*, const IntPoint& paintOffset, const IntRect& damageRect, bool paintingOverlayControls); |
| bool hitTestOverflowControls(HitTestResult&, const IntPoint& localPoint, const IntRect&); |
| |
| RenderLayerModelObject* renderer() const; |
| |
| RenderLayer* m_layer; |
| |
| unsigned m_scrollDimensionsDirty : 1; |
| unsigned m_inOverflowRelayout : 1; |
| |
| // The width/height of our scrolled area. |
| LayoutRect m_overflowRect; |
| |
| // This is the (scroll) offset from scrollOrigin(). |
| IntSize m_scrollOffset; |
| |
| // For areas with overflow, we have a pair of scrollbars. |
| RefPtr<Scrollbar> m_hBar; |
| RefPtr<Scrollbar> m_vBar; |
| }; |
| |
| } // Namespace WebCore |
| |
| #endif // RenderLayerScrollableArea_h |