mirror of
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57 lines
1.5 KiB
JavaScript
57 lines
1.5 KiB
JavaScript
/* eslint-disable
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camelcase,
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handle-callback-err,
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new-cap,
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no-throw-literal,
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no-unused-vars,
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*/
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// TODO: This file was created by bulk-decaffeinate.
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// Fix any style issues and re-enable lint.
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/*
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* decaffeinate suggestions:
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* DS101: Remove unnecessary use of Array.from
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* DS102: Remove unnecessary code created because of implicit returns
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* DS207: Consider shorter variations of null checks
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* Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
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*/
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let DiffCodec
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const { diff_match_patch } = require('../lib/diff_match_patch')
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const 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) {
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if (callback == null) {
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callback = function (error, ops) {}
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}
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const diffs = dmp.diff_main(before.join('\n'), after.join('\n'))
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dmp.diff_cleanupSemantic(diffs)
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const ops = []
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let position = 0
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for (const diff of Array.from(diffs)) {
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const type = diff[0]
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const content = diff[1]
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if (type === this.ADDED) {
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ops.push({
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i: content,
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p: position
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})
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position += content.length
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} else if (type === this.REMOVED) {
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ops.push({
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d: content,
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p: position
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})
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} else if (type === this.UNCHANGED) {
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position += content.length
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} else {
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throw 'Unknown type'
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}
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}
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return callback(null, ops)
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}
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}
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