103 lines
4.0 KiB
JavaScript
103 lines
4.0 KiB
JavaScript
"use strict";
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var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
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if (k2 === undefined) k2 = k;
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Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
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}) : (function(o, m, k, k2) {
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if (k2 === undefined) k2 = k;
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o[k2] = m[k];
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}));
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var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
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Object.defineProperty(o, "default", { enumerable: true, value: v });
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}) : function(o, v) {
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o["default"] = v;
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});
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var __importStar = (this && this.__importStar) || function (mod) {
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if (mod && mod.__esModule) return mod;
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var result = {};
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if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
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__setModuleDefault(result, mod);
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return result;
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.createCodeFrame = void 0;
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const kl = __importStar(require("kolorist"));
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/**
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* Convert tabs indentation to two spaces.
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*/
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function tabs2Spaces(str) {
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return str.replace(/^\t+/, tabs => ' '.repeat(tabs.length));
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}
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/**
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* Generate an excerpt of the location in the source around the
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* specified position.
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*/
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function createCodeFrame(text, lineNum, columnNum, { before = 2, after = 3, colors = true, maxWidth = 0, lineMarkerChar = '▶', seperatorChar = '│', columnMarkerChar = '▲' } = {}) {
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const lines = text.split('\n');
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const start = Math.max(0, lineNum - before);
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const end = Math.min(lines.length, lineNum + after + 1);
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// Maximum space needed for line numbering in the current range.
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// Necessary when the amount of digits of the line numbering grows:
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// 999 | asdf
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// 1000 | asdjadfjsa
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const maxLineNum = String(end).length;
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const padding = ' '.repeat(maxLineNum);
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// Normalize all indentation (=tabs) to use 2 spaces. We need to
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// apply the difference to the marker position to move it back in
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// place.
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const spaceLines = [];
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let maxLineLen = 0;
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for (let i = start; i < end; i++) {
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const line = tabs2Spaces(lines[i]);
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spaceLines.push(line);
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if (line.length > maxLineLen)
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maxLineLen = line.length;
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}
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const activeLine = spaceLines[lineNum - start];
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// Move marker into correct place by taking the amount of
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// normalized tabs into account
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const count = Math.max(0, activeLine.length - lines[lineNum].length + columnNum);
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const maxLensWidth = maxWidth - '> '.length - padding.length - ' | '.length;
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let left = 0;
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let right = maxLensWidth;
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if (maxWidth > 0) {
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const half = Math.floor(maxLensWidth / 2);
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let winLeft = count - half;
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if (winLeft > 0) {
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let winRight = count + half - 1;
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left = winLeft;
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right = winRight;
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if (winRight > maxLensWidth) {
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const offset = Math.min(0, winRight - maxLensWidth);
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left -= offset;
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right -= offset;
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}
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}
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}
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const sep = kl.dim(seperatorChar);
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let out = '';
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for (let i = 0; i < spaceLines.length; i++) {
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const line = spaceLines[i];
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const currentLine = kl.dim((padding + (i + start + 1)).slice(-maxLineNum));
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let formatted = line;
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if (maxWidth > 0) {
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formatted = formatted.slice(left, Math.min(right, line.length));
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if (left > 0) {
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formatted = '…' + formatted;
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}
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if (line.length > right) {
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formatted += '…';
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}
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}
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// Line where the error occured
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if (i === lineNum - start) {
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out += kl.red(lineMarkerChar) + ` ${currentLine} ${sep} ${formatted}\n`;
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out += ` ${padding} ${sep} ${' '.repeat(count - left)}${kl.bold(kl.red(columnMarkerChar))}\n`;
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}
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else {
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out += ` ${currentLine} ${sep} ${formatted}\n`;
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}
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}
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return colors ? out : kl.stripColors(out);
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}
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exports.createCodeFrame = createCodeFrame;
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//# sourceMappingURL=index.js.map
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