IHPDFContentOperatorVisitor

Receives synchronous begin-stream, operator, and end-stream callbacks

Declaration

IHPDFContentOperatorVisitor = interface
  procedure VisitContentOperator(
    var EventData: THPDFContentOperatorEventData);
end;

Parameters

EventData contains the phase, source location, state snapshot, read-only operand view, requested action, and optional replacement bytes

Return value

This method does not return a value; set EventData.Action to control traversal

Usage notes

• The caller retains the interface for the duration of traversal
• The view inside EventData is borrowed and valid only during the callback
• Do not retain document objects or re-enter transformation on the same document from the callback
• Exceptions become covsVisitorError, except operation cancellation which propagates unchanged

Related APIs

• Content Operator Visitors
• THotPDF.ContentOperatorVisitor
• THotPDF.OnContentOperator