import sys
import DefaultTable
import array
from fontTools import ttLib
from fontTools.misc.textTools import safeEval

class table__c_v_t(DefaultTable.DefaultTable):
	
	def decompile(self, data, ttFont):
		values = array.array("h")
		values.fromstring(data)
		if sys.byteorder <> "big":
			values.byteswap()
		self.values = values
	
	def compile(self, ttFont):
		values = self.values[:]
		if sys.byteorder <> "big":
			values.byteswap()
		return values.tostring()
	
	def toXML(self, writer, ttFont):
		for i in range(len(self.values)):
			value = self.values[i]
			writer.simpletag("cv", value=value, index=i)
			writer.newline()
	
	def fromXML(self, (name, attrs, content), ttFont):
		if not hasattr(self, "values"):
			self.values = array.array("h")
		if name == "cv":
			index = safeEval(attrs["index"])
			value = safeEval(attrs["value"])
			for i in range(1 + index - len(self.values)):
				self.values.append(0)
			self.values[index] = value
	
	def __len__(self):
		return len(self.values)
	
	def __getitem__(self, index):
		return self.values[index]
	
	def __setitem__(self, index, value):
		self.values[index] = value
	
	def __delitem__(self, index):
		del self.values[index]

