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