Make Content of User Macro Become Searchable

Currently, any content of User Macro is not searchable. For example:

1. create user macro using the following:

   ## Macro title: My Macro
   ## Macro has a body: Y or N
   ## Body processing: Selected body processing option
   ## Output: Selected output option
   ##
   ## Developed by: My Name
   ## Date created: dd/mm/yyyy
   ## Installed by: My Name
   
   ## This is an example macro
   ## @param Name:title=Name|type=string|required=true|desc=Your name
   ## @param Colour:title=Favourite Colour|type=enum|enumValues=red,green,blue|default=red|desc=Choose your favourite colour
   
   Hello, <font color="$paramColour">$paramName</font>!
   

2. create a page and then insert the user macro
3. insert a string
4. try to search for the string , the string is not searchable