hexo/node_modules/webpack/lib/json/JsonGenerator.js

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2023-09-25 15:58:56 +08:00
/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const { RawSource } = require("webpack-sources");
const ConcatenationScope = require("../ConcatenationScope");
const { UsageState } = require("../ExportsInfo");
const Generator = require("../Generator");
const RuntimeGlobals = require("../RuntimeGlobals");
/** @typedef {import("webpack-sources").Source} Source */
/** @typedef {import("../ExportsInfo")} ExportsInfo */
/** @typedef {import("../Generator").GenerateContext} GenerateContext */
/** @typedef {import("../Module").ConcatenationBailoutReasonContext} ConcatenationBailoutReasonContext */
/** @typedef {import("../NormalModule")} NormalModule */
/** @typedef {import("../util/runtime").RuntimeSpec} RuntimeSpec */
/** @typedef {import("./JsonData")} JsonData */
/** @typedef {import("./JsonModulesPlugin").RawJsonData} RawJsonData */
/**
* @param {RawJsonData} data Raw JSON data
* @returns {undefined|string} stringified data
*/
const stringifySafe = data => {
const stringified = JSON.stringify(data);
if (!stringified) {
return undefined; // Invalid JSON
}
return stringified.replace(/\u2028|\u2029/g, str =>
str === "\u2029" ? "\\u2029" : "\\u2028"
); // invalid in JavaScript but valid JSON
};
/**
* @param {RawJsonData} data Raw JSON data (always an object or array)
* @param {ExportsInfo} exportsInfo exports info
* @param {RuntimeSpec} runtime the runtime
* @returns {RawJsonData} reduced data
*/
const createObjectForExportsInfo = (data, exportsInfo, runtime) => {
if (exportsInfo.otherExportsInfo.getUsed(runtime) !== UsageState.Unused)
return data;
const isArray = Array.isArray(data);
/** @type {RawJsonData} */
const reducedData = isArray ? [] : {};
for (const key of Object.keys(data)) {
const exportInfo = exportsInfo.getReadOnlyExportInfo(key);
const used = exportInfo.getUsed(runtime);
if (used === UsageState.Unused) continue;
/** @type {RawJsonData} */
let value;
if (used === UsageState.OnlyPropertiesUsed && exportInfo.exportsInfo) {
value = createObjectForExportsInfo(
data[key],
exportInfo.exportsInfo,
runtime
);
} else {
value = data[key];
}
const name = /** @type {string} */ (exportInfo.getUsedName(key, runtime));
/** @type {Record<string, RawJsonData>} */ (reducedData)[name] = value;
}
if (isArray) {
let arrayLengthWhenUsed =
exportsInfo.getReadOnlyExportInfo("length").getUsed(runtime) !==
UsageState.Unused
? data.length
: undefined;
let sizeObjectMinusArray = 0;
for (let i = 0; i < reducedData.length; i++) {
if (reducedData[i] === undefined) {
sizeObjectMinusArray -= 2;
} else {
sizeObjectMinusArray += `${i}`.length + 3;
}
}
if (arrayLengthWhenUsed !== undefined) {
sizeObjectMinusArray +=
`${arrayLengthWhenUsed}`.length +
8 -
(arrayLengthWhenUsed - reducedData.length) * 2;
}
if (sizeObjectMinusArray < 0)
return Object.assign(
arrayLengthWhenUsed === undefined
? {}
: { length: arrayLengthWhenUsed },
reducedData
);
/** @type {number} */
const generatedLength =
arrayLengthWhenUsed !== undefined
? Math.max(arrayLengthWhenUsed, reducedData.length)
: reducedData.length;
for (let i = 0; i < generatedLength; i++) {
if (reducedData[i] === undefined) {
reducedData[i] = 0;
}
}
}
return reducedData;
};
const TYPES = new Set(["javascript"]);
class JsonGenerator extends Generator {
/**
* @param {NormalModule} module fresh module
* @returns {Set<string>} available types (do not mutate)
*/
getTypes(module) {
return TYPES;
}
/**
* @param {NormalModule} module the module
* @param {string=} type source type
* @returns {number} estimate size of the module
*/
getSize(module, type) {
/** @type {RawJsonData | undefined} */
const data =
module.buildInfo &&
module.buildInfo.jsonData &&
module.buildInfo.jsonData.get();
if (!data) return 0;
return /** @type {string} */ (stringifySafe(data)).length + 10;
}
/**
* @param {NormalModule} module module for which the bailout reason should be determined
* @param {ConcatenationBailoutReasonContext} context context
* @returns {string | undefined} reason why this module can't be concatenated, undefined when it can be concatenated
*/
getConcatenationBailoutReason(module, context) {
return undefined;
}
/**
* @param {NormalModule} module module for which the code should be generated
* @param {GenerateContext} generateContext context for generate
* @returns {Source} generated code
*/
generate(
module,
{
moduleGraph,
runtimeTemplate,
runtimeRequirements,
runtime,
concatenationScope
}
) {
/** @type {RawJsonData | undefined} */
const data =
module.buildInfo &&
module.buildInfo.jsonData &&
module.buildInfo.jsonData.get();
if (data === undefined) {
return new RawSource(
runtimeTemplate.missingModuleStatement({
request: module.rawRequest
})
);
}
const exportsInfo = moduleGraph.getExportsInfo(module);
/** @type {RawJsonData} */
let finalJson =
typeof data === "object" &&
data &&
exportsInfo.otherExportsInfo.getUsed(runtime) === UsageState.Unused
? createObjectForExportsInfo(data, exportsInfo, runtime)
: data;
// Use JSON because JSON.parse() is much faster than JavaScript evaluation
const jsonStr = /** @type {string} */ (stringifySafe(finalJson));
const jsonExpr =
jsonStr.length > 20 && typeof finalJson === "object"
? `JSON.parse('${jsonStr.replace(/[\\']/g, "\\$&")}')`
: jsonStr;
/** @type {string} */
let content;
if (concatenationScope) {
content = `${runtimeTemplate.supportsConst() ? "const" : "var"} ${
ConcatenationScope.NAMESPACE_OBJECT_EXPORT
} = ${jsonExpr};`;
concatenationScope.registerNamespaceExport(
ConcatenationScope.NAMESPACE_OBJECT_EXPORT
);
} else {
runtimeRequirements.add(RuntimeGlobals.module);
content = `${module.moduleArgument}.exports = ${jsonExpr};`;
}
return new RawSource(content);
}
}
module.exports = JsonGenerator;