#MenuTitle: Lowercase
# -*- coding: utf-8 -*-
"""Converts the selected text to lowercase."""

Doc = Glyphs.currentDocument
Font = Glyphs.font
Doc = Glyphs.currentDocument
TextStoreage = Doc.windowController().activeEditViewController().graphicView().textStorage()
String = TextStoreage.text().string()
Range = TextStoreage.selectedRange()
if Range.length == 0:
	Range.length = 1

# or if you pefer to replace the hole sting if nothing is selected:
if Range.length == 0:
	Range.location = 0
	Range.length = len(String)

String = String.substringWithRange_(Range)

def LowercaseString(String):
	LowerString = ""
	for Char in String:
		g = Font.glyphForCharacter_(ord(Char))
		try:
			if ord(Char) > ord(' '):
				name = g.name
				baseName = name
				suffix = None
				periodPos = baseName.find(".")
				if periodPos > 0:
					baseName = name[:periodPos]
					suffix = name[periodPos:]
				UpperGlyph = Font.glyphForName_(baseName)
				UpperString = u"%c" % int(UpperGlyph.unicode, 16)
				LowerUnicode = "%0.4X" % ord(UpperString.lower()[0])
				LowerGlyph = Font.glyphForUnicode_(LowerUnicode)
				if suffix is not None:
					LowerName = LowerGlyph.name + suffix
					LowerGlyph = Font.glyphForName_(LowerName)
				Char = unichr(Font.characterForGlyph_(LowerGlyph))
		except:
			pass
		LowerString += Char
	return LowerString

LowerString = LowercaseString(String)
TextStoreage.replaceCharactersInRange_withString_(Range, LowerString)