| 1 | /*
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| 2 | MIT License http://www.opensource.org/licenses/mit-license.php
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| 3 | Author Tobias Koppers @sokra
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| 4 | */
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| 5 | "use strict";
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| 6 |
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| 7 | const Source = require("./Source");
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| 8 | const RawSource = require("./RawSource");
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| 9 | const streamChunks = require("./helpers/streamChunks");
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| 10 | const { getMap, getSourceAndMap } = require("./helpers/getFromStreamChunks");
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| 11 |
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| 12 | const stringsAsRawSources = new WeakSet();
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| 13 |
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| 14 | class ConcatSource extends Source {
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| 15 | constructor() {
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| 16 | super();
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| 17 | this._children = [];
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| 18 | for (let i = 0; i < arguments.length; i++) {
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| 19 | const item = arguments[i];
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| 20 | if (item instanceof ConcatSource) {
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| 21 | for (const child of item._children) {
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| 22 | this._children.push(child);
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| 23 | }
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| 24 | } else {
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| 25 | this._children.push(item);
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| 26 | }
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| 27 | }
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| 28 | this._isOptimized = arguments.length === 0;
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| 29 | }
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| 30 |
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| 31 | getChildren() {
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| 32 | if (!this._isOptimized) this._optimize();
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| 33 | return this._children;
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| 34 | }
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| 35 |
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| 36 | add(item) {
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| 37 | if (item instanceof ConcatSource) {
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| 38 | for (const child of item._children) {
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| 39 | this._children.push(child);
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| 40 | }
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| 41 | } else {
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| 42 | this._children.push(item);
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| 43 | }
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| 44 | this._isOptimized = false;
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| 45 | }
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| 46 |
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| 47 | addAllSkipOptimizing(items) {
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| 48 | for (const item of items) {
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| 49 | this._children.push(item);
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| 50 | }
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| 51 | }
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| 52 |
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| 53 | buffer() {
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| 54 | if (!this._isOptimized) this._optimize();
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| 55 | const buffers = [];
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| 56 | for (const child of this._children) {
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| 57 | if (typeof child.buffer === "function") {
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| 58 | buffers.push(child.buffer());
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| 59 | } else {
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| 60 | const bufferOrString = child.source();
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| 61 | if (Buffer.isBuffer(bufferOrString)) {
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| 62 | buffers.push(bufferOrString);
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| 63 | } else {
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| 64 | // This will not happen
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| 65 | buffers.push(Buffer.from(bufferOrString, "utf-8"));
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| 66 | }
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| 67 | }
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| 68 | }
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| 69 | return Buffer.concat(buffers);
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| 70 | }
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| 71 |
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| 72 | source() {
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| 73 | if (!this._isOptimized) this._optimize();
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| 74 | let source = "";
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| 75 | for (const child of this._children) {
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| 76 | source += child.source();
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| 77 | }
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| 78 | return source;
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| 79 | }
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| 80 |
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| 81 | size() {
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| 82 | if (!this._isOptimized) this._optimize();
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| 83 | let size = 0;
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| 84 | for (const child of this._children) {
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| 85 | size += child.size();
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| 86 | }
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| 87 | return size;
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| 88 | }
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| 89 |
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| 90 | map(options) {
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| 91 | return getMap(this, options);
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| 92 | }
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| 93 |
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| 94 | sourceAndMap(options) {
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| 95 | return getSourceAndMap(this, options);
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| 96 | }
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| 97 |
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| 98 | streamChunks(options, onChunk, onSource, onName) {
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| 99 | if (!this._isOptimized) this._optimize();
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| 100 | if (this._children.length === 1)
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| 101 | return this._children[0].streamChunks(options, onChunk, onSource, onName);
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| 102 | let currentLineOffset = 0;
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| 103 | let currentColumnOffset = 0;
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| 104 | let sourceMapping = new Map();
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| 105 | let nameMapping = new Map();
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| 106 | const finalSource = !!(options && options.finalSource);
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| 107 | let code = "";
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| 108 | let needToCloseMapping = false;
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| 109 | for (const item of this._children) {
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| 110 | const sourceIndexMapping = [];
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| 111 | const nameIndexMapping = [];
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| 112 | let lastMappingLine = 0;
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| 113 | const { generatedLine, generatedColumn, source } = streamChunks(
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| 114 | item,
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| 115 | options,
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| 116 | // eslint-disable-next-line no-loop-func
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| 117 | (
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| 118 | chunk,
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| 119 | generatedLine,
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| 120 | generatedColumn,
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| 121 | sourceIndex,
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| 122 | originalLine,
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| 123 | originalColumn,
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| 124 | nameIndex
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| 125 | ) => {
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| 126 | const line = generatedLine + currentLineOffset;
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| 127 | const column =
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| 128 | generatedLine === 1
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| 129 | ? generatedColumn + currentColumnOffset
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| 130 | : generatedColumn;
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| 131 | if (needToCloseMapping) {
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| 132 | if (generatedLine !== 1 || generatedColumn !== 0) {
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| 133 | onChunk(
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| 134 | undefined,
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| 135 | currentLineOffset + 1,
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| 136 | currentColumnOffset,
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| 137 | -1,
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| 138 | -1,
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| 139 | -1,
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| 140 | -1
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| 141 | );
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| 142 | }
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| 143 | needToCloseMapping = false;
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| 144 | }
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| 145 | const resultSourceIndex =
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| 146 | sourceIndex < 0 || sourceIndex >= sourceIndexMapping.length
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| 147 | ? -1
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| 148 | : sourceIndexMapping[sourceIndex];
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| 149 | const resultNameIndex =
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| 150 | nameIndex < 0 || nameIndex >= nameIndexMapping.length
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| 151 | ? -1
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| 152 | : nameIndexMapping[nameIndex];
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| 153 | lastMappingLine = resultSourceIndex < 0 ? 0 : generatedLine;
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| 154 | if (finalSource) {
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| 155 | if (chunk !== undefined) code += chunk;
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| 156 | if (resultSourceIndex >= 0) {
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| 157 | onChunk(
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| 158 | undefined,
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| 159 | line,
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| 160 | column,
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| 161 | resultSourceIndex,
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| 162 | originalLine,
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| 163 | originalColumn,
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| 164 | resultNameIndex
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| 165 | );
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| 166 | }
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| 167 | } else {
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| 168 | if (resultSourceIndex < 0) {
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| 169 | onChunk(chunk, line, column, -1, -1, -1, -1);
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| 170 | } else {
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| 171 | onChunk(
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| 172 | chunk,
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| 173 | line,
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| 174 | column,
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| 175 | resultSourceIndex,
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| 176 | originalLine,
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| 177 | originalColumn,
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| 178 | resultNameIndex
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| 179 | );
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| 180 | }
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| 181 | }
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| 182 | },
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| 183 | (i, source, sourceContent) => {
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| 184 | let globalIndex = sourceMapping.get(source);
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| 185 | if (globalIndex === undefined) {
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| 186 | sourceMapping.set(source, (globalIndex = sourceMapping.size));
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| 187 | onSource(globalIndex, source, sourceContent);
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| 188 | }
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| 189 | sourceIndexMapping[i] = globalIndex;
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| 190 | },
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| 191 | (i, name) => {
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| 192 | let globalIndex = nameMapping.get(name);
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| 193 | if (globalIndex === undefined) {
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| 194 | nameMapping.set(name, (globalIndex = nameMapping.size));
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| 195 | onName(globalIndex, name);
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| 196 | }
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| 197 | nameIndexMapping[i] = globalIndex;
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| 198 | }
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| 199 | );
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| 200 | if (source !== undefined) code += source;
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| 201 | if (needToCloseMapping) {
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| 202 | if (generatedLine !== 1 || generatedColumn !== 0) {
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| 203 | onChunk(
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| 204 | undefined,
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| 205 | currentLineOffset + 1,
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| 206 | currentColumnOffset,
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| 207 | -1,
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| 208 | -1,
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| 209 | -1,
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| 210 | -1
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| 211 | );
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| 212 | needToCloseMapping = false;
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| 213 | }
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| 214 | }
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| 215 | if (generatedLine > 1) {
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| 216 | currentColumnOffset = generatedColumn;
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| 217 | } else {
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| 218 | currentColumnOffset += generatedColumn;
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| 219 | }
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| 220 | needToCloseMapping =
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| 221 | needToCloseMapping ||
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| 222 | (finalSource && lastMappingLine === generatedLine);
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| 223 | currentLineOffset += generatedLine - 1;
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| 224 | }
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| 225 | return {
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| 226 | generatedLine: currentLineOffset + 1,
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| 227 | generatedColumn: currentColumnOffset,
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| 228 | source: finalSource ? code : undefined
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| 229 | };
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| 230 | }
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| 231 |
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| 232 | updateHash(hash) {
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| 233 | if (!this._isOptimized) this._optimize();
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| 234 | hash.update("ConcatSource");
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| 235 | for (const item of this._children) {
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| 236 | item.updateHash(hash);
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| 237 | }
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| 238 | }
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| 239 |
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| 240 | _optimize() {
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| 241 | const newChildren = [];
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| 242 | let currentString = undefined;
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| 243 | let currentRawSources = undefined;
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| 244 | const addStringToRawSources = string => {
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| 245 | if (currentRawSources === undefined) {
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| 246 | currentRawSources = string;
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| 247 | } else if (Array.isArray(currentRawSources)) {
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| 248 | currentRawSources.push(string);
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| 249 | } else {
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| 250 | currentRawSources = [
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| 251 | typeof currentRawSources === "string"
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| 252 | ? currentRawSources
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| 253 | : currentRawSources.source(),
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| 254 | string
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| 255 | ];
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| 256 | }
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| 257 | };
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| 258 | const addSourceToRawSources = source => {
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| 259 | if (currentRawSources === undefined) {
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| 260 | currentRawSources = source;
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| 261 | } else if (Array.isArray(currentRawSources)) {
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| 262 | currentRawSources.push(source.source());
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| 263 | } else {
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| 264 | currentRawSources = [
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| 265 | typeof currentRawSources === "string"
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| 266 | ? currentRawSources
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| 267 | : currentRawSources.source(),
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| 268 | source.source()
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| 269 | ];
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| 270 | }
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| 271 | };
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| 272 | const mergeRawSources = () => {
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| 273 | if (Array.isArray(currentRawSources)) {
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| 274 | const rawSource = new RawSource(currentRawSources.join(""));
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| 275 | stringsAsRawSources.add(rawSource);
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| 276 | newChildren.push(rawSource);
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| 277 | } else if (typeof currentRawSources === "string") {
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| 278 | const rawSource = new RawSource(currentRawSources);
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| 279 | stringsAsRawSources.add(rawSource);
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| 280 | newChildren.push(rawSource);
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| 281 | } else {
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| 282 | newChildren.push(currentRawSources);
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| 283 | }
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| 284 | };
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| 285 | for (const child of this._children) {
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| 286 | if (typeof child === "string") {
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| 287 | if (currentString === undefined) {
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| 288 | currentString = child;
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| 289 | } else {
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| 290 | currentString += child;
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| 291 | }
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| 292 | } else {
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| 293 | if (currentString !== undefined) {
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| 294 | addStringToRawSources(currentString);
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| 295 | currentString = undefined;
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| 296 | }
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| 297 | if (stringsAsRawSources.has(child)) {
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| 298 | addSourceToRawSources(child);
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| 299 | } else {
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| 300 | if (currentRawSources !== undefined) {
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| 301 | mergeRawSources();
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| 302 | currentRawSources = undefined;
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| 303 | }
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| 304 | newChildren.push(child);
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| 305 | }
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| 306 | }
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| 307 | }
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| 308 | if (currentString !== undefined) {
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| 309 | addStringToRawSources(currentString);
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| 310 | }
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| 311 | if (currentRawSources !== undefined) {
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| 312 | mergeRawSources();
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| 313 | }
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| 314 | this._children = newChildren;
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| 315 | this._isOptimized = true;
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| 316 | }
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| 317 | }
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| 318 |
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| 319 | module.exports = ConcatSource;
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