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#include "LogModel.h"
LogModel::LogModel(QObject *parent):QAbstractListModel(parent)
{
m_content.resize(m_maxLines);
}
int LogModel::rowCount(const QModelIndex &parent) const
{
if (parent.isValid())
return 0;
return m_numLines;
}
QVariant LogModel::data(const QModelIndex &index, int role) const
{
if (index.row() < 0 || index.row() >= m_numLines)
return QVariant();
auto row = index.row();
auto realRow = (row + m_firstLine) % m_maxLines;
if (role == Qt::DisplayRole || role == Qt::EditRole)
{
return m_content[realRow].line;
}
if(role == LevelRole)
{
return m_content[realRow].level;
}
return QVariant();
}
void LogModel::append(MessageLevel::Enum level, QString line)
{
int lineNum = (m_firstLine + m_numLines) % m_maxLines;
// overflow
if(m_numLines == m_maxLines)
{
if(m_stopOnOverflow)
{
// nothing more to do, the buffer is full
return;
}
beginRemoveRows(QModelIndex(), 0, 0);
m_firstLine = (m_firstLine + 1) % m_maxLines;
m_numLines --;
endRemoveRows();
}
else if (m_numLines == m_maxLines - 1 && m_stopOnOverflow)
{
level = MessageLevel::Fatal;
line = m_overflowMessage;
}
beginInsertRows(QModelIndex(), m_numLines, m_numLines);
m_numLines ++;
m_content[lineNum].level = level;
m_content[lineNum].line = line;
endInsertRows();
}
void LogModel::clear()
{
beginResetModel();
m_firstLine = 0;
m_numLines = 0;
endResetModel();
}
QString LogModel::toPlainText()
{
QString out;
out.reserve(m_numLines * 80);
for(int i = 0; i < m_numLines; i++)
{
QString & line = m_content[(m_firstLine + i) % m_maxLines].line;
out.append(line + '\n');
}
out.squeeze();
return out;
}
void LogModel::setMaxLines(int maxLines)
{
// no-op
if(maxLines == m_maxLines)
{
return;
}
// if it all still fits in the buffer, just resize it
if(m_firstLine + m_numLines < maxLines)
{
m_maxLines = maxLines;
m_content.resize(maxLines);
return;
}
// otherwise, we need to reorganize the data because it crosses the wrap boundary
QVector<entry> newContent;
newContent.resize(maxLines);
if(m_numLines <= maxLines)
{
// if it all fits in the new buffer, just copy it over
for(int i = 0; i < m_numLines; i++)
{
newContent[i] = m_content[(m_firstLine + i) % m_maxLines];
}
m_content.swap(newContent);
}
else
{
// if it doesn't fit, part of the data needs to be thrown away (the oldest log messages)
int lead = m_numLines - maxLines;
beginRemoveRows(QModelIndex(), 0, lead - 1);
for(int i = 0; i < maxLines; i++)
{
newContent[i] = m_content[(m_firstLine + lead + i) % m_maxLines];
}
m_numLines = m_maxLines;
m_content.swap(newContent);
endRemoveRows();
}
m_firstLine = 0;
m_maxLines = maxLines;
}
void LogModel::setStopOnOverflow(bool stop)
{
m_stopOnOverflow = stop;
}
void LogModel::setOverflowMessage(const QString& overflowMessage)
{
m_overflowMessage = overflowMessage;
}
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