java - Leads that will help me to develop Eclipse line numbering like plugin -

i want develop little plugin eclipse, , grateful if give me leads. need know how current line numbering panel implemented, need either source code of custom plugin similar functionality, or in eclipse sources after current line numbering functionality.

thank help.

look iverticalrulercolumn. per javadoc:

a vertical ruler column element can added composite vertical ruler (org.eclipse.jface.text.source.compositeruler). composite vertical ruler vertical ruler dynamically changing appearance , behavior depending on actual arrangement of ruler columns. vertical ruler column supports subset of contract of vertical ruler.

class for: org.eclipse.ui.texteditor.abstractdecoratedtexteditor of editors extend this.

method for: createlinenumberrulercolumn()