Source/core/editing/DeleteFromTextNodeCommand.cpp

/*
 * Copyright (C) 2005, 2008 Apple Inc. 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
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 * 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 APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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#include "config.h"
#include "core/editing/DeleteFromTextNodeCommand.h"

#include "bindings/core/v8/ExceptionState.h"
#include "bindings/core/v8/ExceptionStatePlaceholder.h"
#include "core/dom/Text.h"

namespace blink {

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

void DeleteFromTextNodeCommand::doApply()
{
    ASSERT(m_node);

    if (!m_node->isContentEditable(Node::UserSelectAllIsAlwaysNonEditable))
        return;

    TrackExceptionState exceptionState;
    m_text = m_node->substringData(m_offset, m_count, exceptionState);
    if (exceptionState.hadException())
        return;

    m_node->deleteData(m_offset, m_count, exceptionState, CharacterData::DeprecatedRecalcStyleImmediatlelyForEditing);
}

void DeleteFromTextNodeCommand::doUnapply()
{
    ASSERT(m_node);

    if (!m_node->hasEditableStyle())
        return;

    m_node->insertData(m_offset, m_text, IGNORE_EXCEPTION, CharacterData::DeprecatedRecalcStyleImmediatlelyForEditing);
}

void DeleteFromTextNodeCommand::trace(Visitor* visitor)
{
    visitor->trace(m_node);
    SimpleEditCommand::trace(visitor);
}

} // namespace blink