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38 lines
937 B
38 lines
937 B
const {inspect} = require('util');
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/////////////////////////////////////////////////////////////
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// Returns {line, column} of an index within multi-line text.
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function getIndexPos(text, index) {
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let lineIdx = 0, colIdx = index, pos = 0;
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do {
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pos = text.indexOf('\n', pos);
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if (pos === -1 || index < pos + 1) {
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break;
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}
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lineIdx++;
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pos++;
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colIdx = index - pos;
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} while (pos < index);
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return {
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line: lineIdx + 1,
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column: colIdx + 1
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};
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}
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///////////////////////////////////////////
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// Returns a space gap for console output.
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function messageGap(level) {
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return ' '.repeat(level * 4);
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}
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////////////////////////////////////////////////////
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// Type inspection
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function addInspection(type, cb) {
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type[inspect.custom] = cb;
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}
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module.exports = {
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getIndexPos,
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messageGap,
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addInspection
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};
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