Source/WebCore/editing/DeleteFromTextNodeCommand.cpp

/*
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 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
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#include "config.h"
#include "DeleteFromTextNodeCommand.h"

#include "Editing.h"
#include "Document.h"
#include "Text.h"

namespace WebCore {

DeleteFromTextNodeCommand::DeleteFromTextNodeCommand(Ref<Text>&& node, unsigned offset, unsigned count, EditAction editingAction)
    : SimpleEditCommand(node->document(), editingAction)
    , m_node(WTFMove(node))
    , m_offset(offset)
    , m_count(count)
{
    ASSERT(m_offset <= m_node->length());
    ASSERT(m_offset + m_count <= m_node->length());
}

void DeleteFromTextNodeCommand::doApply()
{
    if (!isEditableNode(m_node))
        return;

    auto result = m_node->substringData(m_offset, m_count);
    if (result.hasException())
        return;
    m_text = result.releaseReturnValue();
    m_node->deleteData(m_offset, m_count);
}

void DeleteFromTextNodeCommand::doUnapply()
{
    if (!m_node->hasEditableStyle())
        return;

    m_node->insertData(m_offset, m_text);
}

#ifndef NDEBUG
void DeleteFromTextNodeCommand::getNodesInCommand(HashSet<Node*>& nodes)
{
    addNodeAndDescendants(m_node.ptr(), nodes);
}
#endif

} // namespace WebCore