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31 lines
701 B
CoffeeScript
31 lines
701 B
CoffeeScript
diff_match_patch = require("../lib/diff_match_patch").diff_match_patch
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dmp = new diff_match_patch()
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module.exports = DiffCodec =
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ADDED: 1
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REMOVED: -1
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UNCHANGED: 0
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diffAsShareJsOp: (before, after, callback = (error, ops) ->) ->
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diffs = dmp.diff_main(before.join("\n"), after.join("\n"))
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dmp.diff_cleanupSemantic(diffs)
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ops = []
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position = 0
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for diff in diffs
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type = diff[0]
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content = diff[1]
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if type == @ADDED
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ops.push
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i: content
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p: position
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position += content.length
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else if type == @REMOVED
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ops.push
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d: content
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p: position
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else if type == @UNCHANGED
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position += content.length
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else
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throw "Unknown type"
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callback null, ops
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