/// ------------------------------------------------------------------------------------
/// <summary>
/// Verifies the pattern is valid. If user wants to use a regex, this validates the
/// regular expression.
/// </summary>
/// <returns><c>true</c> if regular expression is valid or if we don't use regular
/// expressions, <c>false</c> if regEx is invalid.</returns>
/// ------------------------------------------------------------------------------------
private bool PatternIsValid()
{
if (chkUseRegularExpressions.Checked)
{
IMatcher testMatcher = new RegExpMatcher(m_vwPattern);
if (!testMatcher.IsValid())
{
DisplayInvalidRegExMessage(testMatcher.ErrorMessage());
return false;
}
}
return true;
}
private IMatcher GetMatcher(int ws)
{
IMatcher matcher = null;
SetupSearchPattern(ws);
if (m_rbtnUseRegExp.Checked)
matcher = new RegExpMatcher(m_vwPattern);
else if (m_rbtnWholeItem.Checked)
{
// See whether we can use the MUCH more efficient ExactLiteralMatcher
if (!m_vwPattern.UseRegularExpressions
&& m_vwPattern.MatchDiacritics
&& m_vwPattern.MatchOldWritingSystem
&& m_vwPattern.Pattern.RunCount == 1)
{
string target = m_vwPattern.Pattern.Text;
int nVar;
int wsMatch = m_vwPattern.Pattern.get_Properties(0).GetIntPropValues((int) FwTextPropType.ktptWs,
out nVar);
if (m_vwPattern.MatchCase)
return new ExactLiteralMatcher(target, wsMatch);
return new ExactCaseInsensitiveLiteralMatcher(target, wsMatch);
}
matcher = new ExactMatcher(m_vwPattern);
}
else if (m_rbtnAtEnd.Checked)
matcher = new EndMatcher(m_vwPattern);
else if (m_rbtnAtStart.Checked)
matcher = new BeginMatcher(m_vwPattern);
else
matcher = new AnywhereMatcher(m_vwPattern);
if (!matcher.IsValid())
{
if (matcher is RegExpMatcher)
ShowRegExpMatcherError(matcher);
else
MessageBox.Show(this, matcher.ErrorMessage(), "Warning", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
return matcher;
}
private IMatcher GetRegExpMatcher(int ws)
{
SetupSearchPattern(ws);
IMatcher matcher = new RegExpMatcher(m_vwPattern);
if (!matcher.IsValid())
{
ShowRegExpMatcherError(matcher);
}
return matcher;
}