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'''Path/selection related transformations.'''





from transf import parse

import ir.match





parse.Transfs(r'''



#######################################################################

# Path annotation



# Only annotate term applications

annotate = path.Annotate(

	match.ApplNames(`

		ir.match.stmtNames +

		ir.match.exprNames +

		ir.match.typeNames

	`)

)



deannotate = path.deannotate





#######################################################################

# Selection



shared selection



Applicable(t) =

	with selection in

		?[root, selection] ;

		!root ;

		t

	end



Input(t) =

	with selection in

		?[root, selection] ;

		!root ;

		# annotate ;

		t ;

		![selection, *<id>]

	end



Input2(t) =

	with selection in

		?[root, selection] ;

		!root ;

		# annotate ;

		t

	end



Apply(t) =

	with selection in

		?[root, [selection, *args]] ;

		![root, args] ;

		t ;

		deannotate

	end







WithSelection(s, x) = with selection in x where selection := s end







projectSelection = path.Project(!selection)



MatchSelectionTo(s) = projectSelection ; s





#######################################################################

# Selection context



getSelection = !selection



isSelected =

	Where(

		path.get ;

		path.Equals(getSelection)

	)



inSelection =

	Where(

		path.get ;

		path.Contained(getSelection)

	)



hasSelection =

	Where(

		path.get ;

		path.Contains(getSelection)

	)



''')