DeleteFromTextNodeCommand.cpp   [plain text]

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#include "config.h"
#include "DeleteFromTextNodeCommand.h"

#include "Document.h"
#include "ExceptionCodePlaceholder.h"
#include "Text.h"
#include "htmlediting.h"

namespace WebCore {

DeleteFromTextNodeCommand::DeleteFromTextNodeCommand(RefPtr<Text>&& node, unsigned offset, unsigned count, EditAction editingAction)
    : SimpleEditCommand(node->document(), editingAction)
    , 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 (!isEditableNode(*m_node))
        return;

    ExceptionCode ec = 0;
    m_text = m_node->substringData(m_offset, m_count, ec);
    if (ec)
        return;
    
    // Need to notify this before actually deleting the text
    if (shouldPostAccessibilityNotification())
        notifyAccessibilityForTextChange(m_node.get(), applyEditType(), m_text, VisiblePosition(Position(m_node, m_offset)));

    m_node->deleteData(m_offset, m_count, ec);
}

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

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

    m_node->insertData(m_offset, m_text, IGNORE_EXCEPTION);

    if (shouldPostAccessibilityNotification())
        notifyAccessibilityForTextChange(m_node.get(), unapplyEditType(), m_text, VisiblePosition(Position(m_node, m_offset)));
}

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

} // namespace WebCore