/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Florent Cailhol @ooflorent
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*/
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"use strict";
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const DependencyTemplate = require("../DependencyTemplate");
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const InitFragment = require("../InitFragment");
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const makeSerializable = require("../util/makeSerializable");
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const NullDependency = require("./NullDependency");
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/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
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/** @typedef {import("../Dependency")} Dependency */
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/** @typedef {import("../Dependency").UpdateHashContext} UpdateHashContext */
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/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
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/** @typedef {import("../javascript/JavascriptParser").Range} Range */
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/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
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/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */
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/** @typedef {import("../util/Hash")} Hash */
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class CachedConstDependency extends NullDependency {
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/**
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* Creates an instance of CachedConstDependency.
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* @param {string} expression expression
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* @param {Range | null} range range
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* @param {string} identifier identifier
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* @param {number=} place place where we inject the expression
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*/
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constructor(
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expression,
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range,
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identifier,
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place = CachedConstDependency.PLACE_MODULE
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) {
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super();
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this.expression = expression;
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this.range = range;
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this.identifier = identifier;
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this.place = place;
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/** @type {undefined | string} */
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this._hashUpdate = undefined;
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}
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/**
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* Create hash update.
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* @returns {string} hash update
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*/
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_createHashUpdate() {
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return `${this.place}${this.identifier}${this.range}${this.expression}`;
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}
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/**
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* Updates the hash with the data contributed by this instance.
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* @param {Hash} hash hash to be updated
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* @param {UpdateHashContext} context context
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* @returns {void}
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*/
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updateHash(hash, context) {
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if (this._hashUpdate === undefined) {
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this._hashUpdate = this._createHashUpdate();
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}
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hash.update(this._hashUpdate);
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}
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/**
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* Serializes this instance into the provided serializer context.
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* @param {ObjectSerializerContext} context context
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*/
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serialize(context) {
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const { write } = context;
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write(this.expression);
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write(this.range);
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write(this.identifier);
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write(this.place);
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super.serialize(context);
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}
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/**
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* Restores this instance from the provided deserializer context.
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* @param {ObjectDeserializerContext} context context
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*/
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deserialize(context) {
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const { read } = context;
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this.expression = read();
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this.range = read();
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this.identifier = read();
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this.place = read();
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super.deserialize(context);
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}
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}
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CachedConstDependency.PLACE_MODULE = 10;
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CachedConstDependency.PLACE_CHUNK = 20;
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makeSerializable(
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CachedConstDependency,
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"webpack/lib/dependencies/CachedConstDependency"
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);
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CachedConstDependency.Template = class CachedConstDependencyTemplate extends (
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DependencyTemplate
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) {
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/**
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* Applies the plugin by registering its hooks on the compiler.
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* @param {Dependency} dependency the dependency for which the template should be applied
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* @param {ReplaceSource} source the current replace source which can be modified
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* @param {DependencyTemplateContext} templateContext the context object
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* @returns {void}
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*/
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apply(dependency, source, { initFragments, chunkInitFragments }) {
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const dep = /** @type {CachedConstDependency} */ (dependency);
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(dep.place === CachedConstDependency.PLACE_MODULE
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? initFragments
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: chunkInitFragments
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).push(
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new InitFragment(
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`var ${dep.identifier} = ${dep.expression};\n`,
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InitFragment.STAGE_CONSTANTS,
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// For a chunk we inject expression after imports
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dep.place === CachedConstDependency.PLACE_MODULE ? 0 : 10,
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`const ${dep.identifier}`
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)
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);
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if (typeof dep.range === "number") {
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source.insert(dep.range, dep.identifier);
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} else if (dep.range !== null) {
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source.replace(dep.range[0], dep.range[1] - 1, dep.identifier);
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}
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}
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};
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module.exports = CachedConstDependency;
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