330 lines
9.9 KiB
JavaScript
330 lines
9.9 KiB
JavaScript
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/*
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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 streamChunksOfSourceMap = require("./streamChunksOfSourceMap");
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const splitIntoLines = require("./splitIntoLines");
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const streamChunksOfCombinedSourceMap = (
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source,
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sourceMap,
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innerSourceName,
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innerSource,
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innerSourceMap,
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removeInnerSource,
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onChunk,
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onSource,
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onName,
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finalSource,
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columns
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) => {
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let sourceMapping = new Map();
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let nameMapping = new Map();
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const sourceIndexMapping = [];
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const nameIndexMapping = [];
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const nameIndexValueMapping = [];
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let innerSourceIndex = -2;
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const innerSourceIndexMapping = [];
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const innerSourceIndexValueMapping = [];
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const innerSourceContents = [];
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const innerSourceContentLines = [];
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const innerNameIndexMapping = [];
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const innerNameIndexValueMapping = [];
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const innerSourceMapLineData = [];
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const findInnerMapping = (line, column) => {
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if (line > innerSourceMapLineData.length) return -1;
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const { mappingsData } = innerSourceMapLineData[line - 1];
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let l = 0;
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let r = mappingsData.length / 5;
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while (l < r) {
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let m = (l + r) >> 1;
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if (mappingsData[m * 5] <= column) {
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l = m + 1;
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} else {
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r = m;
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}
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}
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if (l === 0) return -1;
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return l - 1;
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};
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return streamChunksOfSourceMap(
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source,
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sourceMap,
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(
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chunk,
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generatedLine,
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generatedColumn,
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sourceIndex,
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originalLine,
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originalColumn,
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nameIndex
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) => {
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// Check if this is a mapping to the inner source
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if (sourceIndex === innerSourceIndex) {
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// Check if there is a mapping in the inner source
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const idx = findInnerMapping(originalLine, originalColumn);
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if (idx !== -1) {
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const { chunks, mappingsData } = innerSourceMapLineData[
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originalLine - 1
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];
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const mi = idx * 5;
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const innerSourceIndex = mappingsData[mi + 1];
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const innerOriginalLine = mappingsData[mi + 2];
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let innerOriginalColumn = mappingsData[mi + 3];
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let innerNameIndex = mappingsData[mi + 4];
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if (innerSourceIndex >= 0) {
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// Check for an identity mapping
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// where we are allowed to adjust the original column
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const innerChunk = chunks[idx];
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const innerGeneratedColumn = mappingsData[mi];
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const locationInChunk = originalColumn - innerGeneratedColumn;
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if (locationInChunk > 0) {
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let originalSourceLines =
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innerSourceIndex < innerSourceContentLines.length
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? innerSourceContentLines[innerSourceIndex]
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: null;
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if (originalSourceLines === undefined) {
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const originalSource = innerSourceContents[innerSourceIndex];
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originalSourceLines = originalSource
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? splitIntoLines(originalSource)
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: null;
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innerSourceContentLines[innerSourceIndex] = originalSourceLines;
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}
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if (originalSourceLines !== null) {
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const originalChunk =
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innerOriginalLine <= originalSourceLines.length
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? originalSourceLines[innerOriginalLine - 1].slice(
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innerOriginalColumn,
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innerOriginalColumn + locationInChunk
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)
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: "";
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if (innerChunk.slice(0, locationInChunk) === originalChunk) {
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innerOriginalColumn += locationInChunk;
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innerNameIndex = -1;
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}
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}
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}
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// We have a inner mapping to original source
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// emit source when needed and compute global source index
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let sourceIndex =
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innerSourceIndex < innerSourceIndexMapping.length
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? innerSourceIndexMapping[innerSourceIndex]
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: -2;
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if (sourceIndex === -2) {
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const [source, sourceContent] =
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innerSourceIndex < innerSourceIndexValueMapping.length
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? innerSourceIndexValueMapping[innerSourceIndex]
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: [null, undefined];
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let globalIndex = sourceMapping.get(source);
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if (globalIndex === undefined) {
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sourceMapping.set(source, (globalIndex = sourceMapping.size));
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onSource(globalIndex, source, sourceContent);
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}
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sourceIndex = globalIndex;
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innerSourceIndexMapping[innerSourceIndex] = sourceIndex;
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}
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// emit name when needed and compute global name index
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let finalNameIndex = -1;
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if (innerNameIndex >= 0) {
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// when we have a inner name
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finalNameIndex =
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innerNameIndex < innerNameIndexMapping.length
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? innerNameIndexMapping[innerNameIndex]
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: -2;
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if (finalNameIndex === -2) {
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const name =
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innerNameIndex < innerNameIndexValueMapping.length
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? innerNameIndexValueMapping[innerNameIndex]
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: undefined;
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if (name) {
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let globalIndex = nameMapping.get(name);
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if (globalIndex === undefined) {
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nameMapping.set(name, (globalIndex = nameMapping.size));
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onName(globalIndex, name);
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}
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finalNameIndex = globalIndex;
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} else {
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finalNameIndex = -1;
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}
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innerNameIndexMapping[innerNameIndex] = finalNameIndex;
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}
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} else if (nameIndex >= 0) {
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// when we don't have an inner name,
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// but we have an outer name
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// it can be used when inner original code equals to the name
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let originalSourceLines =
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innerSourceContentLines[innerSourceIndex];
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if (originalSourceLines === undefined) {
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const originalSource = innerSourceContents[innerSourceIndex];
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originalSourceLines = originalSource
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? splitIntoLines(originalSource)
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: null;
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innerSourceContentLines[innerSourceIndex] = originalSourceLines;
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}
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if (originalSourceLines !== null) {
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const name = nameIndexValueMapping[nameIndex];
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const originalName =
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innerOriginalLine <= originalSourceLines.length
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? originalSourceLines[innerOriginalLine - 1].slice(
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innerOriginalColumn,
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innerOriginalColumn + name.length
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)
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: "";
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if (name === originalName) {
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finalNameIndex =
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nameIndex < nameIndexMapping.length
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? nameIndexMapping[nameIndex]
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: -2;
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if (finalNameIndex === -2) {
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const name = nameIndexValueMapping[nameIndex];
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if (name) {
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let globalIndex = nameMapping.get(name);
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if (globalIndex === undefined) {
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nameMapping.set(name, (globalIndex = nameMapping.size));
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onName(globalIndex, name);
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}
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finalNameIndex = globalIndex;
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} else {
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finalNameIndex = -1;
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}
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nameIndexMapping[nameIndex] = finalNameIndex;
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}
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}
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}
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}
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onChunk(
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chunk,
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generatedLine,
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generatedColumn,
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sourceIndex,
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innerOriginalLine,
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innerOriginalColumn,
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finalNameIndex
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);
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return;
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}
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}
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// We have a mapping to the inner source, but no inner mapping
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if (removeInnerSource) {
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onChunk(chunk, generatedLine, generatedColumn, -1, -1, -1, -1);
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return;
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} else {
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if (sourceIndexMapping[sourceIndex] === -2) {
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let globalIndex = sourceMapping.get(innerSourceName);
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if (globalIndex === undefined) {
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sourceMapping.set(source, (globalIndex = sourceMapping.size));
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onSource(globalIndex, innerSourceName, innerSource);
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}
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sourceIndexMapping[sourceIndex] = globalIndex;
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}
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}
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}
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const finalSourceIndex =
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sourceIndex < 0 || sourceIndex >= sourceIndexMapping.length
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? -1
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: sourceIndexMapping[sourceIndex];
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if (finalSourceIndex < 0) {
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// no source, so we make it a generated chunk
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onChunk(chunk, generatedLine, generatedColumn, -1, -1, -1, -1);
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} else {
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// Pass through the chunk with mapping
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let finalNameIndex = -1;
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if (nameIndex >= 0 && nameIndex < nameIndexMapping.length) {
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finalNameIndex = nameIndexMapping[nameIndex];
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if (finalNameIndex === -2) {
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const name = nameIndexValueMapping[nameIndex];
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let globalIndex = nameMapping.get(name);
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if (globalIndex === undefined) {
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nameMapping.set(name, (globalIndex = nameMapping.size));
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onName(globalIndex, name);
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}
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finalNameIndex = globalIndex;
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nameIndexMapping[nameIndex] = finalNameIndex;
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}
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}
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onChunk(
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chunk,
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generatedLine,
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generatedColumn,
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finalSourceIndex,
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originalLine,
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originalColumn,
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finalNameIndex
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);
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}
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},
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(i, source, sourceContent) => {
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if (source === innerSourceName) {
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innerSourceIndex = i;
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if (innerSource !== undefined) sourceContent = innerSource;
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else innerSource = sourceContent;
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sourceIndexMapping[i] = -2;
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streamChunksOfSourceMap(
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sourceContent,
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innerSourceMap,
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(
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chunk,
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generatedLine,
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generatedColumn,
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sourceIndex,
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originalLine,
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originalColumn,
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nameIndex
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) => {
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while (innerSourceMapLineData.length < generatedLine) {
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innerSourceMapLineData.push({
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mappingsData: [],
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chunks: []
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});
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}
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const data = innerSourceMapLineData[generatedLine - 1];
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data.mappingsData.push(
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generatedColumn,
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sourceIndex,
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originalLine,
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originalColumn,
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nameIndex
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);
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data.chunks.push(chunk);
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},
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(i, source, sourceContent) => {
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innerSourceContents[i] = sourceContent;
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innerSourceContentLines[i] = undefined;
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innerSourceIndexMapping[i] = -2;
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innerSourceIndexValueMapping[i] = [source, sourceContent];
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},
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(i, name) => {
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innerNameIndexMapping[i] = -2;
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innerNameIndexValueMapping[i] = name;
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},
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false,
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columns
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);
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} else {
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let globalIndex = sourceMapping.get(source);
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if (globalIndex === undefined) {
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sourceMapping.set(source, (globalIndex = sourceMapping.size));
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onSource(globalIndex, source, sourceContent);
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}
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sourceIndexMapping[i] = globalIndex;
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}
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},
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(i, name) => {
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nameIndexMapping[i] = -2;
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nameIndexValueMapping[i] = name;
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},
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finalSource,
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columns
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);
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};
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module.exports = streamChunksOfCombinedSourceMap;
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