62 lines
1.3 KiB
CoffeeScript
62 lines
1.3 KiB
CoffeeScript
|
|
#
|
|
# The Engine handles how and in which order to execute operations and add operations to the HistoryBuffer.
|
|
#
|
|
class Engine
|
|
constructor: (@HB, @parser)->
|
|
@unprocessed_ops = []
|
|
|
|
parseOperation: (json)->
|
|
typeParser = @parser[json.type]
|
|
if typeParser?
|
|
typeParser json
|
|
else
|
|
throw new Error "You forgot to specify a parser for type #{json.type}. The message is #{JSON.stringify json}."
|
|
|
|
applyOps: (ops_json)->
|
|
ops = []
|
|
for o in ops_json
|
|
ops.push @parseOperation o
|
|
for o in ops
|
|
@HB.addOperation o
|
|
for o in ops
|
|
if not o.execute()
|
|
@unprocessed_ops.push o
|
|
@tryUnprocessed()
|
|
|
|
applyOp: (op_json)->
|
|
# $parse_and_execute will return false if $o_json was parsed and executed, otherwise the parsed operadion
|
|
o = @parseOperation op_json
|
|
@HB.addOperation o
|
|
if not o.execute()
|
|
@unprocessed_ops.push o
|
|
@tryUnprocessed()
|
|
|
|
tryUnprocessed: ()->
|
|
while true
|
|
old_length = @unprocessed_ops.length
|
|
unprocessed = []
|
|
for op in @unprocessed_ops
|
|
if not op.execute()
|
|
unprocessed.push op
|
|
@unprocessed_ops = unprocessed
|
|
if @unprocessed_ops.length is old_length
|
|
break
|
|
|
|
|
|
|
|
|
|
module.exports = Engine
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|