Changed textarea code to use the new text API

src/client/textarea.coffee

@@ -4,47 +4,60 @@
 # always localised, the diffing is quite easy.
 #
 # This algorithm is O(N), but I suspect you could speed it up somehow using regular expressions.
-opFromDiff = (oldval, newval) ->
-	return [] if oldval == newval
+applyChange = (doc, oldval, newval) ->
+	return if oldval == newval
 	commonStart = 0
 	commonStart++ while oldval.charAt(commonStart) == newval.charAt(commonStart)
 
 	commonEnd = 0
 	commonEnd++ while oldval.charAt(oldval.length - 1 - commonEnd) == newval.charAt(newval.length - 1 - commonEnd) and
 		commonEnd + commonStart < oldval.length and commonEnd + commonStart < newval.length
 
-	window.sharejs.types.text.normalize [{p:commonStart, d:oldval[commonStart ... oldval.length - commonEnd]},
-		{p:commonStart, i:newval[commonStart ... newval.length - commonEnd]}]
+	doc.del oldval.length - commonStart - commonEnd, commonStart unless oldval.length == commonStart + commonEnd
+	doc.insert newval[commonStart ... newval.length - commonEnd], commonStart unless newval.length == commonStart + commonEnd
 
 window.sharejs.Document::attach_textarea = (elem) ->
 	doc = this
 	elem.value = @snapshot
 	prevvalue = elem.value
 
-	@on 'remoteop', (op) ->
+	replaceText = (newText, transformCursor) ->
 		newSelection = [
-			doc.type.transformCursor elem.selectionStart, op, true
-			doc.type.transformCursor elem.selectionEnd, op, true
+			transformCursor elem.selectionStart
+			transformCursor elem.selectionEnd
 		]
-		scrollTop = elem.scrollTop
-
-		elem.value = doc.snapshot
 
+		scrollTop = elem.scrollTop
+		elem.value = newText
 		elem.scrollTop = scrollTop if elem.scrollTop != scrollTop
 		[elem.selectionStart, elem.selectionEnd] = newSelection
 
-	genOp = (event) ->
-		#console.log event
+	@on 'insert', (text, pos) ->
+		transformCursor = (cursor) ->
+			if pos <= cursor
+				cursor + text.length
+			else
+				cursor
 
+		replaceText elem.value[...pos] + text + elem.value[pos..], transformCursor
+
+	@on 'delete', (text, pos) ->
+		transformCursor = (cursor) ->
+			if pos < cursor
+				cursor - Math.min(text.length, cursor - pos)
+			else
+				cursor
+
+		replaceText elem.value[...pos] + elem.value[pos + text.length..], transformCursor
+
+	genOp = (event) ->
 		onNextTick = (fn) -> setTimeout fn, 0
 		onNextTick ->
-			#console.log doc.snapshot, elem.value
 			if elem.value != prevvalue
 				# IE constantly replaces unix newlines with \r\n. ShareJS docs
 				# should only have unix newlines.
 				prevvalue = elem.value
-				op = opFromDiff doc.snapshot, elem.value.replace /\r\n/g, '\n'
-				doc.submitOp op unless op.length == 0
+				applyChange doc, doc.getText(), elem.value.replace /\r\n/g, '\n'
 
 	for event in ['textInput', 'keydown', 'keyup', 'select', 'cut', 'paste']
 		if elem.addEventListener