mirror of
https://github.com/RGBCube/serenity
synced 2025-05-18 18:35:06 +00:00
615a4d4f71
Boxes can now be floated left or right, which makes text within the same block formatting context flow around them. We were creating way too many block formatting contexts. As it turns out, we don't need one for every new block, but rather there's a set of rules that determines whether a given block creates a new block formatting context. Each BFC keeps track of the floating boxes within it, and IFC's can then query it to find the available space for line boxes. There's a huge hack in here where we assume all lines are the exact line-height. Making this work with vertically non-uniform lines will require some architectural changes.
87 lines
3.2 KiB
C++
87 lines
3.2 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 <LibWeb/Layout/Box.h>
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#include <LibWeb/Layout/LineBox.h>
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namespace Web::Layout {
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class BlockBox : public Box {
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public:
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BlockBox(DOM::Document&, DOM::Node*, NonnullRefPtr<CSS::StyleProperties>);
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virtual ~BlockBox() override;
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virtual const char* class_name() const override { return "BlockBox"; }
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virtual void paint(PaintContext&, PaintPhase) override;
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virtual HitTestResult hit_test(const Gfx::IntPoint&, HitTestType) const override;
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BlockBox* previous_sibling() { return downcast<BlockBox>(Node::previous_sibling()); }
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const BlockBox* previous_sibling() const { return downcast<BlockBox>(Node::previous_sibling()); }
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BlockBox* next_sibling() { return downcast<BlockBox>(Node::next_sibling()); }
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const BlockBox* next_sibling() const { return downcast<BlockBox>(Node::next_sibling()); }
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template<typename Callback>
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void for_each_fragment(Callback);
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template<typename Callback>
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void for_each_fragment(Callback) const;
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virtual void split_into_lines(InlineFormattingContext&, LayoutMode) override;
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private:
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virtual bool is_block() const override { return true; }
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};
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template<typename Callback>
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void BlockBox::for_each_fragment(Callback callback)
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{
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for (auto& line_box : line_boxes()) {
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for (auto& fragment : line_box.fragments()) {
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if (callback(fragment) == IterationDecision::Break)
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return;
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}
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}
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}
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template<typename Callback>
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void BlockBox::for_each_fragment(Callback callback) const
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{
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for (auto& line_box : line_boxes()) {
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for (auto& fragment : line_box.fragments()) {
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if (callback(fragment) == IterationDecision::Break)
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return;
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}
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}
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}
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}
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AK_BEGIN_TYPE_TRAITS(Web::Layout::BlockBox)
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static bool is_type(const Web::Layout::Node& layout_node) { return layout_node.is_block(); }
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AK_END_TYPE_TRAITS()
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