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48 lines
1.2 KiB
JavaScript
48 lines
1.2 KiB
JavaScript
/*
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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 {
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diff_match_patch
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} = 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) { callback = function(error, ops) {}; }
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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 (let 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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