31 lines
732 B
JavaScript
31 lines
732 B
JavaScript
class SourceMap {
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constructor(sourceMapStringOrOffset, length, id) {
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if(typeof sourceMapStringOrOffset == 'string') {
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var [offset, length, id, ..._rest] = sourceMapStringOrOffset.split(":");
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this.offset = parseInt(offset, 10);
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this.length = parseInt(length, 10);
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if(id) this.id = parseInt(id, 10);
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} else {
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this.offset = sourceMapStringOrOffset;
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this.length = length;
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this.id = id;
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}
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}
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subtract(sourceMap) {
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var length = sourceMap.offset - this.offset;
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return new SourceMap(this.offset, length);
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}
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toString() {
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var parts = [this.offset, this.length];
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if(this.id) parts.push(this.id);
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return parts.join(':');
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}
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}
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module.exports = SourceMap;
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