// get the selected range object
protected HtmlTextRange GetTextRange()
{
// define the selected range object
HtmlSelection selection;
HtmlTextRange range = null;
try
{
// calculate the text range based on user selection
selection = GetDomDocument().selection;
if (IsStatedTag(selection.type, SELECT_TYPE_TEXT) || IsStatedTag(selection.type, SELECT_TYPE_NONE))
{
range = selection.createRange() as HtmlTextRange;
}
}
catch (Exception)
{
// have unknown error so set return to null
range = null;
}
return(range);
} // GetTextRange
internal Range(mshtml.IHTMLTxtRange range)
{
msHtmlTxRange = range;
}
internal Range(mshtml.IHTMLTxtRange range)
{
msHtmlTxRange = range;
}
/// <summary>
/// Executes the execCommand on the selected range (given the range)
/// </summary>
private void ExecuteCommandRange(mshtmlTextRange range, string command, object data)
{
try
{
if (!range.IsNull())
{
// ensure command is a valid command and then enabled for the selection
if (range.queryCommandSupported(command))
{
if (range.queryCommandEnabled(command))
{
// mark the selection with the appropriate tag
range.execCommand(command, false, data);
}
}
}
}
catch (Exception ex)
{
// Unknown error so inform user
throw new HtmlEditorException("Unknown MSHTML Error.", command, ex);
}
}
/// <summary>
/// Executes the queryCommandState on the selected range (given the range)
/// </summary>
private bool ExecuteCommandQuery(mshtmlTextRange range, string command, bool isEnabled = false)
{
// set the initial state as false
bool retValue = false;
try
{
if (!range.IsNull())
{
// ensure command is a valid command and then enabled for the selection
if (range.queryCommandSupported(command))
{
if (isEnabled)
{
retValue = range.queryCommandEnabled(command);
}
else
{
if (range.queryCommandEnabled(command))
{
// mark the selection with the appropriate tag
retValue = range.queryCommandState(command);
}
}
}
}
}
catch (Exception ex)
{
// Unknown error so inform user
throw new HtmlEditorException("Unknown MSHTML Error.", command, ex);
}
// return the value
return retValue;
}