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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibWeb/DOM/CharacterData.h>
#include <LibWeb/DOM/Document.h>
namespace Web::DOM {
CharacterData::CharacterData(Document& document, NodeType type, const String& data)
: Node(document, type)
, m_data(data)
{
}
void CharacterData::set_data(String data)
{
if (m_data == data)
return;
m_data = move(data);
if (parent())
parent()->children_changed();
set_needs_style_update(true);
document().set_needs_layout();
}
// https://dom.spec.whatwg.org/#concept-cd-substring
ExceptionOr<String> CharacterData::substring_data(size_t offset, size_t count) const
{
// 1. Let length be node’s length.
auto length = this->length();
// 2. If offset is greater than length, then throw an "IndexSizeError" DOMException.
if (offset > length)
return DOM::IndexSizeError::create("Substring offset out of range.");
// 3. If offset plus count is greater than length, return a string whose value is the code units from the offsetth code unit
// to the end of node’s data, and then return.
if (offset + count > length)
return m_data.substring(offset);
// 4. Return a string whose value is the code units from the offsetth code unit to the offset+countth code unit in node’s data.
return m_data.substring(offset, count);
}
}
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