How to write Macro code for the edit mode?

If you're writing a Macro, and you need to do something specific when the macro is rendered in edit mode, write the following:

• When writing a wiki macro using Velocity
  #if ($xcontext.action == 'get' || $xcontext.action == 'edit' || $request.outputSyntax == 'annotatedxhtml')
    ... do something specific here ...
  #end
• When writing a Java macro
  public class MyMacro extends AbstractMacro<MyMacroParameters>
  {
     ...
     public List<Block> execute(MyMacroParameters parameters, String content, MacroTransformationContext context)
     {
         ...
         if (Syntax.ANNOTATED_XHTML.getId().equals(context.getTransformationContext().getTargetSyntax())) {
             ... do something specific here ...
         }
         ...
     }
  }