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93 lines
3.2 KiB
JavaScript
93 lines
3.2 KiB
JavaScript
/* eslint-disable
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no-return-assign,
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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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// These methods let you build a transform function from a transformComponent function
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// for OT types like text and JSON in which operations are lists of components
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// and transforming them requires N^2 work.
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// Add transform and transformX functions for an OT type which has transformComponent defined.
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// transformComponent(destination array, component, other component, side)
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let bootstrapTransform;
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exports._bt = (bootstrapTransform = function(type, transformComponent, checkValidOp, append) {
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let transformX;
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const transformComponentX = function(left, right, destLeft, destRight) {
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transformComponent(destLeft, left, right, 'left');
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return transformComponent(destRight, right, left, 'right');
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};
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// Transforms rightOp by leftOp. Returns ['rightOp', clientOp']
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type.transformX = (type.transformX = (transformX = function(leftOp, rightOp) {
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checkValidOp(leftOp);
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checkValidOp(rightOp);
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const newRightOp = [];
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for (let rightComponent of Array.from(rightOp)) {
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// Generate newLeftOp by composing leftOp by rightComponent
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const newLeftOp = [];
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let k = 0;
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while (k < leftOp.length) {
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var l;
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const nextC = [];
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transformComponentX(leftOp[k], rightComponent, newLeftOp, nextC);
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k++;
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if (nextC.length === 1) {
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rightComponent = nextC[0];
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} else if (nextC.length === 0) {
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for (l of Array.from(leftOp.slice(k))) { append(newLeftOp, l); }
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rightComponent = null;
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break;
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} else {
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// Recurse.
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const [l_, r_] = Array.from(transformX(leftOp.slice(k), nextC));
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for (l of Array.from(l_)) { append(newLeftOp, l); }
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for (const r of Array.from(r_)) { append(newRightOp, r); }
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rightComponent = null;
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break;
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}
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}
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if (rightComponent != null) { append(newRightOp, rightComponent); }
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leftOp = newLeftOp;
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}
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return [leftOp, newRightOp];
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}));
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// Transforms op with specified type ('left' or 'right') by otherOp.
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return type.transform = (type.transform = function(op, otherOp, type) {
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let _;
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if ((type !== 'left') && (type !== 'right')) { throw new Error("type must be 'left' or 'right'"); }
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if (otherOp.length === 0) { return op; }
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// TODO: Benchmark with and without this line. I _think_ it'll make a big difference...?
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if ((op.length === 1) && (otherOp.length === 1)) { return transformComponent([], op[0], otherOp[0], type); }
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if (type === 'left') {
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let left;
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[left, _] = Array.from(transformX(op, otherOp));
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return left;
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} else {
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let right;
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[_, right] = Array.from(transformX(otherOp, op));
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return right;
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}
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});
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});
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if (typeof WEB === 'undefined') {
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exports.bootstrapTransform = bootstrapTransform;
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}
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