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rOACCT/node_modules/webpack-sources/lib/ConcatSource.js
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ConcatSource.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const Source = require("./Source");
const RawSource = require("./RawSource");
const { SourceNode, SourceMapConsumer } = require("source-map");
const { SourceListMap, fromStringWithSourceMap } = require("source-list-map");
const { getSourceAndMap, getMap } = require("./helpers");
const stringsAsRawSources = new WeakSet();
class ConcatSource extends Source {
constructor() {
super();
this._children = [];
for (let i = 0; i < arguments.length; i++) {
const item = arguments[i];
if (item instanceof ConcatSource) {
for (const child of item._children) {
this._children.push(child);
}
} else {
this._children.push(item);
}
}
this._isOptimized = arguments.length === 0;
}
getChildren() {
if (!this._isOptimized) this._optimize();
return this._children;
}
add(item) {
if (item instanceof ConcatSource) {
for (const child of item._children) {
this._children.push(child);
}
} else {
this._children.push(item);
}
this._isOptimized = false;
}
addAllSkipOptimizing(items) {
for (const item of items) {
this._children.push(item);
}
}
buffer() {
if (!this._isOptimized) this._optimize();
const buffers = [];
for (const child of this._children) {
if (typeof child.buffer === "function") {
buffers.push(child.buffer());
} else {
const bufferOrString = child.source();
if (Buffer.isBuffer(bufferOrString)) {
buffers.push(bufferOrString);
} else {
buffers.push(Buffer.from(bufferOrString, "utf-8"));
}
}
}
return Buffer.concat(buffers);
}
source() {
if (!this._isOptimized) this._optimize();
let source = "";
for (const child of this._children) {
source += child.source();
}
return source;
}
size() {
if (!this._isOptimized) this._optimize();
let size = 0;
for (const child of this._children) {
size += child.size();
}
return size;
}
map(options) {
return getMap(this, options);
}
sourceAndMap(options) {
return getSourceAndMap(this, options);
}
node(options) {
if (!this._isOptimized) this._optimize();
const node = new SourceNode(
null,
null,
null,
this._children.map(function (item) {
if (typeof item.node === "function") return item.node(options);
const sourceAndMap = item.sourceAndMap(options);
if (sourceAndMap.map) {
return SourceNode.fromStringWithSourceMap(
sourceAndMap.source,
new SourceMapConsumer(sourceAndMap.map)
);
} else {
return sourceAndMap.source;
}
})
);
return node;
}
listMap(options) {
if (!this._isOptimized) this._optimize();
const map = new SourceListMap();
for (const item of this._children) {
if (typeof item === "string") {
map.add(item);
} else if (typeof item.listMap === "function") {
map.add(item.listMap(options));
} else {
const sourceAndMap = item.sourceAndMap(options);
if (sourceAndMap.map) {
map.add(
fromStringWithSourceMap(sourceAndMap.source, sourceAndMap.map)
);
} else {
map.add(sourceAndMap.source);
}
}
}
return map;
}
updateHash(hash) {
if (!this._isOptimized) this._optimize();
hash.update("ConcatSource");
for (const item of this._children) {
item.updateHash(hash);
}
}
_optimize() {
const newChildren = [];
let currentString = undefined;
let currentRawSources = undefined;
const addStringToRawSources = string => {
if (currentRawSources === undefined) {
currentRawSources = string;
} else if (Array.isArray(currentRawSources)) {
currentRawSources.push(string);
} else {
currentRawSources = [
typeof currentRawSources === "string"
? currentRawSources
: currentRawSources.source(),
string
];
}
};
const addSourceToRawSources = source => {
if (currentRawSources === undefined) {
currentRawSources = source;
} else if (Array.isArray(currentRawSources)) {
currentRawSources.push(source.source());
} else {
currentRawSources = [
typeof currentRawSources === "string"
? currentRawSources
: currentRawSources.source(),
source.source()
];
}
};
const mergeRawSources = () => {
if (Array.isArray(currentRawSources)) {
const rawSource = new RawSource(currentRawSources.join(""));
stringsAsRawSources.add(rawSource);
newChildren.push(rawSource);
} else if (typeof currentRawSources === "string") {
const rawSource = new RawSource(currentRawSources);
stringsAsRawSources.add(rawSource);
newChildren.push(rawSource);
} else {
newChildren.push(currentRawSources);
}
};
for (const child of this._children) {
if (typeof child === "string") {
if (currentString === undefined) {
currentString = child;
} else {
currentString += child;
}
} else {
if (currentString !== undefined) {
addStringToRawSources(currentString);
currentString = undefined;
}
if (stringsAsRawSources.has(child)) {
addSourceToRawSources(child);
} else {
if (currentRawSources !== undefined) {
mergeRawSources();
currentRawSources = undefined;
}
newChildren.push(child);
}
}
}
if (currentString !== undefined) {
addStringToRawSources(currentString);
}
if (currentRawSources !== undefined) {
mergeRawSources();
}
this._children = newChildren;
this._isOptimized = true;
}
}
module.exports = ConcatSource;
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