42 lines
1.2 KiB
TypeScript
42 lines
1.2 KiB
TypeScript
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import * as plugins from './smartdiff.plugins';
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import diff from 'fast-diff';
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export const createDiff = (originalArg: string, revisionArg: string) => {
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var result = diff(originalArg, revisionArg);
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// According to latest jsperf tests, there's no need to cache array length
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for (var i = 0; i < result.length; i++) {
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var diffItem = result[i];
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// If operation is DELETE or EQUAL, replace the actual text by its length
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if (diffItem[0] < 1) {
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// @ts-ignore
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diffItem[1] = diffItem[1].length;
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}
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}
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return JSON.stringify(result);
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};
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export const applyPatch = (originalArg: string, deltaStringArg: string) => {
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const deltaArg = JSON.parse(deltaStringArg);
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var result = '',
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index = 0;
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// According to latest jsperf tests, there's no need to cache array length
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for (var i = 0; i < deltaArg.length; i++) {
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const item = deltaArg[i];
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const operation = item[0];
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const value = item[1];
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if (operation === -1) {
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// DELETE
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index += value;
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} else if (operation === 0) {
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// KEEP
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result += originalArg.slice(index, index += value);
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} else {
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// INSERT
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result += value;
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}
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}
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return result;
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};
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