| /* |
| * 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 PaintLayerFragment_h |
| #define PaintLayerFragment_h |
| |
| #include "core/layout/ClipRect.h" |
| #include "wtf/Allocator.h" |
| #include "wtf/Vector.h" |
| |
| namespace blink { |
| |
| // PaintLayerFragment is the representation of a fragment. |
| // https://drafts.csswg.org/css-break/#fragment |
| // |
| // Fragments are a paint/hit-testing only concept in Blink. |
| // Every box has at least one fragment, even if it is not paginated/fragmented. |
| // If a box has more than one fragment (i.e. is paginated by an ancestor), the |
| // fragments are called "paginated fragments". Note that this is a Blink |
| // vocabulary extension and doesn't come from the specification. |
| // |
| // The fragments are collected by calling PaintLayer::collectFragments |
| // on every box once per paint/hit-testing operation. |
| struct PaintLayerFragment { |
| DISALLOW_NEW_EXCEPT_PLACEMENT_NEW(); |
| |
| public: |
| void setRects(const LayoutRect& bounds, |
| const ClipRect& background, |
| const ClipRect& foreground) { |
| layerBounds = bounds; |
| backgroundRect = background; |
| foregroundRect = foreground; |
| } |
| |
| void moveBy(const LayoutPoint& offset) { |
| layerBounds.moveBy(offset); |
| backgroundRect.moveBy(offset); |
| foregroundRect.moveBy(offset); |
| paginationClip.moveBy(offset); |
| } |
| |
| void intersect(const LayoutRect& rect) { |
| backgroundRect.intersect(rect); |
| foregroundRect.intersect(rect); |
| } |
| |
| // Set on all fragments. |
| // |
| // The PaintLayer's size in the associated ClipRectsContext's |
| // rootLayer coordinate system. See PaintLayer::m_size for the |
| // exact rectangle. |
| // |
| // TODO(jchaffraix): We should store the rootLayer here to ensure we don't |
| // mix coordinate systems by mistake. |
| LayoutRect layerBounds; |
| |
| // Set on all fragments. |
| // |
| // The rectangle used to clip the background. |
| // |
| // The rectangle is the rectangle-to-paint if no clip applies to the |
| // fragment. It is the intersection between the visual overflow rect |
| // and any overflow clips or 'clip' properties. It is also intersected with |
| // |paginationClip| if it is present. |
| // |
| // See PaintLayerClipper::calculateRects. |
| ClipRect backgroundRect; |
| |
| // Set on all fragments. |
| // |
| // The rectangle used to clip the content (foreground). |
| // |
| // The rectangle is the rectangle-to-paint if no clip applies to the |
| // fragment. If there is an overflow clip, the rectangle-to-paint is |
| // intersected with the border box rect without the scrollbars (content gets |
| // clipped at their edge). Also any enclosing 'clip' properties get applied |
| // to the intersected rectangle. It is also intersected with |
| // |paginationClip| if it is present. |
| // |
| // See PaintLayerClipper::calculateRects. |
| ClipRect foregroundRect; |
| |
| // Only set on paginated fragments. |
| // |
| // The physical translation to apply to shift the layer when |
| // painting/hit-testing. |
| LayoutPoint paginationOffset; |
| |
| // Only set on paginated fragments. |
| // |
| // This is the additional clip from the fragmentainer (i.e. column or |
| // page) that applies to the layer. |backgroundRect| and |foregroundRect| |
| // are intersected with it (see collectFragments). |
| // |
| // It is in layer-local (physical) coordinates. |
| LayoutRect paginationClip; |
| }; |
| |
| typedef Vector<PaintLayerFragment, 1> PaintLayerFragments; |
| |
| } // namespace blink |
| |
| #endif // PaintLayerFragment_h |