public void StartNumbering(PDFPageNumberOptions opts)
{
this._registrations = new List <PDFPageNumberRegistration>();
this._route = new Stack <PDFPageNumberGroup>();
this._namedGroups = new Dictionary <string, PDFPageNumberGroup>();
PDFPageNumberGroup grp;
if (null != opts && opts.HasPageNumbering && GetGroupingFromOptions(this._default, opts, out grp))
{
this._route.Push(grp);
}
}
/// <summary>
/// Extracts out the relevant information from the style and builds a group
/// or returns the DefaultGrouping if there is no relevant information
/// </summary>
/// <param name="style"></param>
/// <returns></returns>
private static bool GetGroupingFromOptions(PDFPageNumberGroup template, PDFPageNumberOptions opts, out PDFPageNumberGroup updated)
{
if (null == opts)
{
throw new ArgumentNullException("opts");
}
if (null == template)
{
throw new ArgumentNullException("template");
}
bool modified = false;
PageNumberStyle numStyle = template.NumberStyle;
int numStart = template.NumberStart;
string grpName = template.GroupName;
if (!string.IsNullOrEmpty(opts.NumberGroup))
{
if (opts.NumberGroup == template.GroupName)
{
throw new InvalidOperationException("The new style and the template have the same name - they should use the same options");
}
grpName = opts.NumberGroup;
modified = true;
}
if (opts.NumberStyle.HasValue)// && style.NumberStyle != numStyle)
{
modified = true;
numStyle = opts.NumberStyle.Value;
}
if (opts.StartIndex.HasValue)// && style.NumberStartIndex != numStart)
{
modified = true;
numStart = opts.StartIndex.Value;
}
if (modified)
{
updated = new PDFPageNumberGroup(template.Owner, grpName, numStyle, numStart);
return(modified);
}
else
{
updated = null;
return(false);
}
}
//
// public methods
//
public PDFPageNumberGroup PushPageNumber(PDFPageNumberOptions opts)
{
if (null != opts && opts.HasPageNumbering)
{
PDFPageNumberGroup grp;
if (string.IsNullOrEmpty(opts.NumberGroup) || !_namedGroups.TryGetValue(opts.NumberGroup, out grp))
{
if (this._route.Count == 0)
{
GetGroupingFromOptions(this._default, opts, out grp);
}
else
{
GetGroupingFromOptions(this._route.Peek(), opts, out grp);
}
}
//check if the pushed style is different from the current group or we don't have anything on the stack.
if (null != grp)
{
if (this._route.Count > 0 && _route.Peek().IsCounting)
{
this._lastGroup = this._route.Peek();
}
this._route.Push(grp);
if (!string.IsNullOrEmpty(grp.GroupName))
{
this._namedGroups.Add(grp.GroupName, grp);
}
return(grp);
}
}
return(null);
}
