RmlUi/Source/Core/Layout/FormattingContext.cpp

/*
 * This source file is part of RmlUi, the HTML/CSS Interface Middleware
 *
 * For the latest information, see http://github.com/mikke89/RmlUi
 *
 * Copyright (c) 2008-2010 CodePoint Ltd, Shift Technology Ltd
 * Copyright (c) 2019 The RmlUi Team, and contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 */

#include "FormattingContext.h"
#include "../../../Include/RmlUi/Core/ComputedValues.h"
#include "../../../Include/RmlUi/Core/Element.h"
#include "BlockFormattingContext.h"
#include "FlexFormattingContext.h"
#include "LayoutBox.h"
#include "ReplacedFormattingContext.h"
#include "TableFormattingContext.h"

namespace Rml {

UniquePtr<LayoutBox> FormattingContext::FormatIndependent(ContainerBox* parent_container, Element* element, const Box* override_initial_box,
	FormattingContextType backup_context)
{
	using namespace Style;

	if (element->IsReplaced())
		return ReplacedFormattingContext::Format(parent_container, element, override_initial_box);

	FormattingContextType type = backup_context;

	auto& computed = element->GetComputedValues();
	const Display display = computed.display();
	if (display == Display::Flex || display == Display::InlineFlex)
	{
		type = FormattingContextType::Flex;
	}
	else if (display == Display::Table || display == Display::InlineTable)
	{
		type = FormattingContextType::Table;
	}
	else if (display == Display::InlineBlock || display == Display::FlowRoot || display == Display::TableCell || computed.float_() != Float::None ||
		computed.position() == Position::Absolute || computed.position() == Position::Fixed || computed.overflow_x() != Overflow::Visible ||
		computed.overflow_y() != Overflow::Visible || !element->GetParentNode() || element->GetParentNode()->GetDisplay() == Display::Flex)
	{
		type = FormattingContextType::Block;
	}

	switch (type)
	{
	case FormattingContextType::Block: return BlockFormattingContext::Format(parent_container, element, override_initial_box);
	case FormattingContextType::Table: return TableFormattingContext::Format(parent_container, element, override_initial_box);
	case FormattingContextType::Flex: return FlexFormattingContext::Format(parent_container, element, override_initial_box);
	case FormattingContextType::None: break;
	}

	return nullptr;
}

} // namespace Rml