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39 lines
1.8 KiB
C++
39 lines
1.8 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <andreas@ladybird.org>
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* Copyright (c) 2021-2023, Sam Atkins <atkinssj@serenityos.org>
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* Copyright (c) 2021, Tobias Christiansen <tobyase@serenityos.org>
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* Copyright (c) 2022-2023, MacDue <macdue@dueutil.tech>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "EdgeRect.h"
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namespace Web::CSS {
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// https://www.w3.org/TR/CSS2/visufx.html#value-def-shape
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CSSPixelRect EdgeRect::resolved(Layout::Node const& layout_node, CSSPixelRect border_box) const
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{
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// In CSS 2.1, the only valid <shape> value is: rect(<top>, <right>, <bottom>, <left>) where
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// <top> and <bottom> specify offsets from the top border edge of the box, and <right>, and
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// <left> specify offsets from the left border edge of the box.
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// The value 'auto' means that a given edge of the clipping region will be the same as the edge
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// of the element's generated border box (i.e., 'auto' means the same as '0' for <top> and
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// <left>, the same as the used value of the height plus the sum of vertical padding and border
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// widths for <bottom>, and the same as the used value of the width plus the sum of the
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// horizontal padding and border widths for <right>, such that four 'auto' values result in the
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// clipping region being the same as the element's border box).
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auto left = border_box.left() + (left_edge.is_auto() ? 0 : left_edge.to_px(layout_node));
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auto top = border_box.top() + (top_edge.is_auto() ? 0 : top_edge.to_px(layout_node));
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auto right = border_box.left() + (right_edge.is_auto() ? border_box.width() : right_edge.to_px(layout_node));
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auto bottom = border_box.top() + (bottom_edge.is_auto() ? border_box.height() : bottom_edge.to_px(layout_node));
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return CSSPixelRect {
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left,
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top,
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right - left,
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bottom - top
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};
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}
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}
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