| /* |
| * 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 THIRD_PARTY_BLINK_RENDERER_CORE_PAINT_PAINT_LAYER_FRAGMENT_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_PAINT_PAINT_LAYER_FRAGMENT_H_ |
| |
| #include "third_party/blink/renderer/core/paint/clip_rect.h" |
| #include "third_party/blink/renderer/platform/wtf/allocator/allocator.h" |
| #include "third_party/blink/renderer/platform/wtf/vector.h" |
| |
| namespace blink { |
| |
| class FragmentData; |
| |
| // 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(); |
| |
| public: |
| // See |root_fragment_data| for the coordinate space of |layer_bounds|, |
| // |background_rect| and |foreground_rect|. |
| |
| // The PaintLayer's size in the space defined by |root_fragment_data|. |
| // See PaintLayer::size_ for the exact rectangle. |
| PhysicalRect layer_bounds; |
| |
| // 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 of |
| // - the visual overflow rect and |
| // - all clips between |root_fragment_data->LocalBorderBoxProperties() |
| // .Clip()| (not included) and |fragment_data->PreClip()| (included). |
| // |
| // See PaintLayerClipper::CalculateRects. |
| ClipRect background_rect; |
| |
| // The rectangle used to clip the content (foreground). |
| // |
| // The rectangle is the rectangle-to-paint if no clip applies to the |
| // fragment. If the layer should apply overflow clip, the rectangle is the |
| // intersection of |background_rect| and the overflow clip rect. Otherwise |
| // it's the same as |background_rect|. |
| // |
| // See PaintLayerClipper::CalculateRects. |
| ClipRect foreground_rect; |
| |
| // Defines the coordinate space of the above rects: |
| // root_fragment_data->LocalBorderBoxProperties().Transform() + |
| // root_fragment_data.PaintOffset(). |
| const FragmentData* root_fragment_data = nullptr; |
| |
| // The corresponding FragmentData of this structure. |
| const FragmentData* fragment_data = nullptr; |
| }; |
| |
| typedef Vector<PaintLayerFragment, 1> PaintLayerFragments; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_PAINT_PAINT_LAYER_FRAGMENT_H_ |