136 lines
3.8 KiB
JavaScript
136 lines
3.8 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const { getMap, getSourceAndMap } = require("./helpers/getFromStreamChunks");
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const splitIntoLines = require("./helpers/splitIntoLines");
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const getGeneratedSourceInfo = require("./helpers/getGeneratedSourceInfo");
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const Source = require("./Source");
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const splitIntoPotentialTokens = require("./helpers/splitIntoPotentialTokens");
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class OriginalSource extends Source {
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constructor(value, name) {
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super();
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const isBuffer = Buffer.isBuffer(value);
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this._value = isBuffer ? undefined : value;
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this._valueAsBuffer = isBuffer ? value : undefined;
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this._name = name;
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}
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getName() {
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return this._name;
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}
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source() {
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if (this._value === undefined) {
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this._value = this._valueAsBuffer.toString("utf-8");
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}
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return this._value;
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}
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buffer() {
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if (this._valueAsBuffer === undefined) {
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this._valueAsBuffer = Buffer.from(this._value, "utf-8");
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}
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return this._valueAsBuffer;
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}
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map(options) {
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return getMap(this, options);
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}
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sourceAndMap(options) {
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return getSourceAndMap(this, options);
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}
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/**
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* @param {object} options options
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* @param {function(string, number, number, number, number, number, number): void} onChunk called for each chunk of code
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* @param {function(number, string, string)} onSource called for each source
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* @param {function(number, string)} onName called for each name
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* @returns {void}
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*/
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streamChunks(options, onChunk, onSource, onName) {
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if (this._value === undefined) {
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this._value = this._valueAsBuffer.toString("utf-8");
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}
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onSource(0, this._name, this._value);
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const finalSource = !!(options && options.finalSource);
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if (!options || options.columns !== false) {
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// With column info we need to read all lines and split them
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const matches = splitIntoPotentialTokens(this._value);
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let line = 1;
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let column = 0;
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if (matches !== null) {
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for (const match of matches) {
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const isEndOfLine = match.endsWith("\n");
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if (isEndOfLine && match.length === 1) {
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if (!finalSource) onChunk(match, line, column, -1, -1, -1, -1);
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} else {
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const chunk = finalSource ? undefined : match;
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onChunk(chunk, line, column, 0, line, column, -1);
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}
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if (isEndOfLine) {
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line++;
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column = 0;
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} else {
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column += match.length;
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}
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}
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}
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return {
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generatedLine: line,
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generatedColumn: column,
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source: finalSource ? this._value : undefined
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};
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} else if (finalSource) {
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// Without column info and with final source we only
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// need meta info to generate mapping
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const result = getGeneratedSourceInfo(this._value);
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const { generatedLine, generatedColumn } = result;
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if (generatedColumn === 0) {
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for (let line = 1; line < generatedLine; line++)
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onChunk(undefined, line, 0, 0, line, 0, -1);
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} else {
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for (let line = 1; line <= generatedLine; line++)
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onChunk(undefined, line, 0, 0, line, 0, -1);
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}
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return result;
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} else {
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// Without column info, but also without final source
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// we need to split source by lines
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let line = 1;
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const matches = splitIntoLines(this._value);
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let match;
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for (match of matches) {
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onChunk(finalSource ? undefined : match, line, 0, 0, line, 0, -1);
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line++;
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}
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return matches.length === 0 || match.endsWith("\n")
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? {
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generatedLine: matches.length + 1,
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generatedColumn: 0,
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source: finalSource ? this._value : undefined
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}
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: {
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generatedLine: matches.length,
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generatedColumn: match.length,
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source: finalSource ? this._value : undefined
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};
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}
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}
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updateHash(hash) {
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if (this._valueAsBuffer === undefined) {
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this._valueAsBuffer = Buffer.from(this._value, "utf-8");
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}
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hash.update("OriginalSource");
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hash.update(this._valueAsBuffer);
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hash.update(this._name || "");
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}
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}
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module.exports = OriginalSource;
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