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79 lines
1.9 KiB
CoffeeScript
79 lines
1.9 KiB
CoffeeScript
child_process = require("child_process")
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BATCH_SIZE = 100
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class ASpellWorker
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constructor: (language) ->
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@language = language
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@pipe = child_process.spawn("aspell", ["pipe", "-t", "--encoding=utf-8", "-d", language])
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@pipe.on 'exit', () =>
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@state = 'killed'
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@pipe.on 'error', (err) =>
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@callback err, []
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@pipe.stdin.on 'error', (err) =>
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@callback err, []
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output = ""
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@pipe.stdout.on "data", (chunk) =>
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# TODO: strip aspell header
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output = output + chunk
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if chunk.toString().match(/^\*$/m)
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@callback(null, output.slice())
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output = ""
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error = ""
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@state = 'ready'
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error = ""
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@pipe.stderr.on "data", (chunk) =>
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error = error + chunk
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@pipe.stdout.on "end", () =>
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# process has ended, remove it from the active list
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if error == ""
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@callback(null, output.slice())
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else
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@callback new Error(error), output.slice()
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isReady: () ->
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return @state == 'ready'
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check: (words, callback) ->
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@state = 'ready'
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@callback = callback
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@setTerseMode()
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@write(words)
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@flush()
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write: (words) ->
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i = 0
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while i < words.length
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# batch up the words to check for efficiency
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batch = words.slice(i, i + BATCH_SIZE)
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@sendWords batch
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i += BATCH_SIZE
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flush: () ->
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# send an end of data marker
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@sendCommand("%") # take the aspell pipe out of terse mode so we can look for a '*'
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@sendCommand("end") # this is a valid word so it will generate a '*'
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@sendCommand("!") # go back into terse mode
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shutdown: () ->
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@pipe.stdin.end()
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setTerseMode: () ->
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@sendCommand("!")
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sendWord: (word) ->
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@sendCommand("^" + word)
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sendWords: (words) ->
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# Aspell accepts multiple words to check on the same line
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# ^word1 word2 word3 ...
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# See aspell.info, writing programs to use Aspell Through A Pipe
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@sendCommand("^" + words.join(" "))
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sendCommand: (command) ->
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@pipe.stdin.write(command + "\n")
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module.exports = ASpellWorker
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