mirror of
https://github.com/LadybirdBrowser/ladybird.git
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656b01eb0f
The box tree and line boxes now all store a relative offset from their containing block, instead of an absolute (document-relative) position. This removes a huge pain point from the layout system which was having to adjust offsets recursively when something moved. It also makes some layout logic significantly simpler. Every box can still find its absolute position by walking its chain of containing blocks and accumulating the translation from the root. This is currently what we do both for rendering and hit testing.
97 lines
3.4 KiB
C++
97 lines
3.4 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <LibGfx/FloatRect.h>
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#include <LibWeb/Layout/LayoutNode.h>
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namespace Web {
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class LayoutBox : public LayoutNodeWithStyleAndBoxModelMetrics {
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public:
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const Gfx::FloatRect absolute_rect() const;
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Gfx::FloatPoint effective_offset() const;
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void set_offset(const Gfx::FloatPoint& offset);
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void set_offset(float x, float y) { set_offset({ x, y }); }
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const Gfx::FloatSize& size() const { return m_size; }
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void set_size(const Gfx::FloatSize&);
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void set_size(float width, float height) { set_size({ width, height }); }
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void set_width(float width) { set_size(width, height()); }
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void set_height(float height) { set_size(width(), height); }
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float width() const { return m_size.width(); }
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float height() const { return m_size.height(); }
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float absolute_x() const { return absolute_rect().x(); }
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float absolute_y() const { return absolute_rect().y(); }
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Gfx::FloatPoint absolute_position() const { return absolute_rect().location(); }
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virtual HitTestResult hit_test(const Gfx::Point& absolute_position) const override;
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virtual void set_needs_display() override;
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bool is_body() const;
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void set_containing_line_box_fragment(LineBoxFragment&);
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protected:
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LayoutBox(const Node* node, NonnullRefPtr<StyleProperties> style)
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: LayoutNodeWithStyleAndBoxModelMetrics(node, move(style))
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{
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}
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virtual void render(RenderingContext&) override;
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virtual void did_set_rect() { }
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private:
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virtual bool is_box() const override { return true; }
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enum class Edge {
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Top,
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Right,
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Bottom,
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Left,
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};
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void paint_border(RenderingContext&, Edge, const Gfx::FloatRect&, CSS::PropertyID style_property_id, CSS::PropertyID color_property_id, CSS::PropertyID width_property_id);
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Gfx::FloatPoint m_offset;
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Gfx::FloatSize m_size;
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// Some boxes hang off of line box fragments. (inline-block, inline-table, replaced, etc)
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WeakPtr<LineBoxFragment> m_containing_line_box_fragment;
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};
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template<>
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inline bool is<LayoutBox>(const LayoutNode& node)
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{
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return node.is_box();
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}
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}
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