webpack/lib/dependencies/HtmlInlineStyleDependency.js

Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
*/

"use strict";

const { CSS_TEXT_TYPE } = require("../ModuleSourceTypeConstants");
const makeSerializable = require("../util/makeSerializable");
const ModuleDependency = require("./ModuleDependency");

/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
/** @typedef {import("../CodeGenerationResults")} CodeGenerationResults */
/** @typedef {import("../Dependency")} Dependency */
/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
/** @typedef {import("../Module")} Module */
/** @typedef {import("../javascript/JavascriptParser").Range} Range */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */
/** @typedef {import("../util/runtime").RuntimeSpec} RuntimeSpec */

/**
 * Represents an inline `<style>...</style>` block in an HTML module. The
 * tag's content is fed into webpack's CSS pipeline as a virtual CSS module
 * with `exportType: "text"` so `url()` and `\@import` references are
 * resolved relative to the HTML file. At render time the original content
 * range is replaced with the processed CSS text read from the CSS module's
 * code generation data.
 */
class HtmlInlineStyleDependency extends ModuleDependency {
	/**
	 * Creates an instance of HtmlInlineStyleDependency.
	 * @param {string} request virtual request resolving to the inline CSS (data URI)
	 * @param {Range} range range of the inline CSS content (between `<style>` and `</style>`)
	 */
	constructor(request, range) {
		super(request);
		this.range = range;
	}

	get type() {
		return "html inline style";
	}

	get category() {
		return "html-style";
	}

	/**
	 * Serializes this instance into the provided serializer context.
	 * @param {ObjectSerializerContext} context context
	 */
	serialize(context) {
		super.serialize(context);
	}

	/**
	 * Restores this instance from the provided deserializer context.
	 * @param {ObjectDeserializerContext} context context
	 */
	deserialize(context) {
		super.deserialize(context);
	}
}

HtmlInlineStyleDependency.Template = class HtmlInlineStyleDependencyTemplate extends (
	ModuleDependency.Template
) {
	/**
	 * Applies the plugin by registering its hooks on the compiler.
	 * @param {Dependency} dependency the dependency for which the template should be applied
	 * @param {ReplaceSource} source the current replace source which can be modified
	 * @param {DependencyTemplateContext} templateContext the context object
	 * @returns {void}
	 */
	apply(dependency, source, { moduleGraph, runtime, codeGenerationResults }) {
		const dep = /** @type {HtmlInlineStyleDependency} */ (dependency);
		const module = /** @type {Module} */ (moduleGraph.getModule(dep));

		/** @type {string} */
		let cssText = "";

		if (module) {
			const codeGen =
				/** @type {CodeGenerationResults} */
				(codeGenerationResults).get(module, runtime);
			const cssTextSource = codeGen.sources.get(CSS_TEXT_TYPE);
			if (cssTextSource) {
				cssText = /** @type {string} */ (cssTextSource.source());
			}
		}

		source.replace(dep.range[0], dep.range[1] - 1, cssText);
	}
};

makeSerializable(
	HtmlInlineStyleDependency,
	"webpack/lib/dependencies/HtmlInlineStyleDependency"
);

module.exports = HtmlInlineStyleDependency;