| /* |
| * Copyright (C) 2003, 2009, 2012 Apple 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 INC. ``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 COMPUTER, INC. OR |
| * 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. |
| */ |
| |
| #ifndef ClipRect_h |
| #define ClipRect_h |
| |
| #include "platform/geometry/LayoutRect.h" |
| |
| #include "wtf/Vector.h" |
| |
| #ifndef NDEBUG |
| #include "core/rendering/RenderBox.h" // For OverlayScrollbarSizeRelevancy. |
| #endif |
| |
| namespace WebCore { |
| |
| class RenderLayer; |
| class HitTestLocation; |
| |
| class ClipRect { |
| public: |
| ClipRect() |
| : m_hasRadius(false) |
| { } |
| |
| ClipRect(const LayoutRect& rect) |
| : m_rect(rect) |
| , m_hasRadius(false) |
| { } |
| |
| const LayoutRect& rect() const { return m_rect; } |
| void setRect(const LayoutRect& rect) { m_rect = rect; } |
| |
| bool hasRadius() const { return m_hasRadius; } |
| void setHasRadius(bool hasRadius) { m_hasRadius = hasRadius; } |
| |
| bool operator==(const ClipRect& other) const { return rect() == other.rect() && hasRadius() == other.hasRadius(); } |
| bool operator!=(const ClipRect& other) const { return rect() != other.rect() || hasRadius() != other.hasRadius(); } |
| bool operator!=(const LayoutRect& otherRect) const { return rect() != otherRect; } |
| |
| void intersect(const LayoutRect& other) { m_rect.intersect(other); } |
| void intersect(const ClipRect& other) |
| { |
| m_rect.intersect(other.rect()); |
| if (other.hasRadius()) |
| m_hasRadius = true; |
| } |
| void move(LayoutUnit x, LayoutUnit y) { m_rect.move(x, y); } |
| void move(const LayoutSize& size) { m_rect.move(size); } |
| void moveBy(const LayoutPoint& point) { m_rect.moveBy(point); } |
| |
| bool isEmpty() const { return m_rect.isEmpty(); } |
| bool intersects(const LayoutRect& rect) const { return m_rect.intersects(rect); } |
| bool intersects(const HitTestLocation&) const; |
| |
| private: |
| LayoutRect m_rect; |
| bool m_hasRadius; |
| }; |
| |
| inline ClipRect intersection(const ClipRect& a, const ClipRect& b) |
| { |
| ClipRect c = a; |
| c.intersect(b); |
| return c; |
| } |
| |
| class ClipRects { |
| WTF_MAKE_FAST_ALLOCATED; |
| public: |
| static PassRefPtr<ClipRects> create() |
| { |
| return adoptRef(new ClipRects); |
| } |
| |
| static PassRefPtr<ClipRects> create(const ClipRects& other) |
| { |
| return adoptRef(new ClipRects(other)); |
| } |
| |
| ClipRects() |
| : m_refCnt(1) |
| , m_fixed(0) |
| { |
| } |
| |
| void reset(const LayoutRect& r) |
| { |
| m_overflowClipRect = r; |
| m_fixedClipRect = r; |
| m_posClipRect = r; |
| m_fixed = 0; |
| } |
| |
| const ClipRect& overflowClipRect() const { return m_overflowClipRect; } |
| void setOverflowClipRect(const ClipRect& r) { m_overflowClipRect = r; } |
| |
| const ClipRect& fixedClipRect() const { return m_fixedClipRect; } |
| void setFixedClipRect(const ClipRect&r) { m_fixedClipRect = r; } |
| |
| const ClipRect& posClipRect() const { return m_posClipRect; } |
| void setPosClipRect(const ClipRect& r) { m_posClipRect = r; } |
| |
| bool fixed() const { return static_cast<bool>(m_fixed); } |
| void setFixed(bool fixed) { m_fixed = fixed ? 1 : 0; } |
| |
| void ref() { m_refCnt++; } |
| void deref() |
| { |
| if (!--m_refCnt) |
| delete this; |
| } |
| |
| bool operator==(const ClipRects& other) const |
| { |
| return m_overflowClipRect == other.overflowClipRect() |
| && m_fixedClipRect == other.fixedClipRect() |
| && m_posClipRect == other.posClipRect() |
| && fixed() == other.fixed(); |
| } |
| |
| ClipRects& operator=(const ClipRects& other) |
| { |
| m_overflowClipRect = other.overflowClipRect(); |
| m_fixedClipRect = other.fixedClipRect(); |
| m_posClipRect = other.posClipRect(); |
| m_fixed = other.fixed(); |
| return *this; |
| } |
| |
| private: |
| ClipRects(const LayoutRect& r) |
| : m_overflowClipRect(r) |
| , m_fixedClipRect(r) |
| , m_posClipRect(r) |
| , m_refCnt(1) |
| , m_fixed(0) |
| { |
| } |
| |
| ClipRects(const ClipRects& other) |
| : m_overflowClipRect(other.overflowClipRect()) |
| , m_fixedClipRect(other.fixedClipRect()) |
| , m_posClipRect(other.posClipRect()) |
| , m_refCnt(1) |
| , m_fixed(other.fixed()) |
| { |
| } |
| |
| ClipRect m_overflowClipRect; |
| ClipRect m_fixedClipRect; |
| ClipRect m_posClipRect; |
| unsigned m_refCnt : 31; |
| unsigned m_fixed : 1; |
| }; |
| |
| enum ClipRectsType { |
| PaintingClipRects, // Relative to painting ancestor. Used for painting. |
| RootRelativeClipRects, // Relative to the ancestor treated as the root (e.g. transformed layer). Used for hit testing. |
| CompositingClipRects, // Relative to the compositing ancestor. Used for updating graphics layer geometry. |
| AbsoluteClipRects, // Relative to the RenderView's layer. Used for compositing overlap testing. |
| NumCachedClipRectsTypes, |
| AllClipRectTypes, |
| TemporaryClipRects |
| }; |
| |
| enum ShouldRespectOverflowClip { |
| IgnoreOverflowClip, |
| RespectOverflowClip |
| }; |
| |
| struct ClipRectsCache { |
| WTF_MAKE_FAST_ALLOCATED; |
| public: |
| ClipRectsCache() |
| { |
| for (int i = 0; i < NumCachedClipRectsTypes; ++i) { |
| m_clipRectsRoot[i] = 0; |
| #ifndef NDEBUG |
| m_scrollbarRelevancy[i] = IgnoreOverlayScrollbarSize; |
| #endif |
| } |
| } |
| |
| PassRefPtr<ClipRects> getClipRects(ClipRectsType clipRectsType, ShouldRespectOverflowClip respectOverflow) { return m_clipRects[getIndex(clipRectsType, respectOverflow)]; } |
| void setClipRects(ClipRectsType clipRectsType, ShouldRespectOverflowClip respectOverflow, PassRefPtr<ClipRects> clipRects, const RenderLayer* root) |
| { |
| m_clipRects[getIndex(clipRectsType, respectOverflow)] = clipRects; |
| m_clipRectsRoot[clipRectsType] = root; |
| } |
| |
| const RenderLayer* clipRectsRoot(ClipRectsType clipRectsType) const { return m_clipRectsRoot[clipRectsType]; } |
| |
| #ifndef NDEBUG |
| OverlayScrollbarSizeRelevancy m_scrollbarRelevancy[NumCachedClipRectsTypes]; |
| #endif |
| |
| private: |
| int getIndex(ClipRectsType clipRectsType, ShouldRespectOverflowClip respectOverflow) |
| { |
| int index = static_cast<int>(clipRectsType); |
| if (respectOverflow == RespectOverflowClip) |
| index += static_cast<int>(NumCachedClipRectsTypes); |
| return index; |
| } |
| |
| const RenderLayer* m_clipRectsRoot[NumCachedClipRectsTypes]; |
| RefPtr<ClipRects> m_clipRects[NumCachedClipRectsTypes * 2]; |
| }; |
| |
| struct LayerFragment { |
| public: |
| LayerFragment() |
| : shouldPaintContent(false) |
| { } |
| |
| void setRects(const LayoutRect& bounds, const ClipRect& background, const ClipRect& foreground, const ClipRect& outline) |
| { |
| layerBounds = bounds; |
| backgroundRect = background; |
| foregroundRect = foreground; |
| outlineRect = outline; |
| } |
| |
| void moveBy(const LayoutPoint& offset) |
| { |
| layerBounds.moveBy(offset); |
| backgroundRect.moveBy(offset); |
| foregroundRect.moveBy(offset); |
| outlineRect.moveBy(offset); |
| paginationClip.moveBy(offset); |
| } |
| |
| void intersect(const LayoutRect& rect) |
| { |
| backgroundRect.intersect(rect); |
| foregroundRect.intersect(rect); |
| outlineRect.intersect(rect); |
| } |
| |
| bool shouldPaintContent; |
| LayoutRect layerBounds; |
| ClipRect backgroundRect; |
| ClipRect foregroundRect; |
| ClipRect outlineRect; |
| |
| // Unique to paginated fragments. The physical translation to apply to shift the layer when painting/hit-testing. |
| LayoutPoint paginationOffset; |
| |
| // Also unique to paginated fragments. An additional clip that applies to the layer. It is in layer-local |
| // (physical) coordinates. |
| LayoutRect paginationClip; |
| }; |
| |
| typedef Vector<LayerFragment, 1> LayerFragments; |
| |
| } // namespace WebCore |
| |
| #endif // ClipRect_h |