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