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LibWeb: Factor out the "stack of open elements" into its own class

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This will allow us to write more expressive parsing code. :^)
This commit is contained in:
Andreas Kling 2020-05-24 19:24:36 +02:00
parent 96cc1138c0
commit 53d2f4df70
5 changed files with 93 additions and 28 deletions
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53
Libraries/LibWeb/Parser/StackOfOpenElements.h Normal file
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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDER 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.
*/
#pragma once
#include <AK/NonnullRefPtrVector.h>
#include <LibWeb/DOM/Element.h>
#include <LibWeb/Forward.h>
namespace Web {
class StackOfOpenElements {
public:
StackOfOpenElements() { }
~StackOfOpenElements();
bool is_empty() const { return m_elements.is_empty(); }
void push(NonnullRefPtr<Element> element) { m_elements.append(move(element)); }
NonnullRefPtr<Element> pop() { return m_elements.take_last(); }
const Element& current_node() const { return m_elements.last(); }
Element& current_node() { return m_elements.last(); }
bool has_in_scope(const FlyString& tag_name) const;
private:
NonnullRefPtrVector<Element> m_elements;
};
}