added hover prefixer

1 files changed, 407 insertions, 0 deletions

diff --git a/node_modules/webpack/lib/dependencies/CommonJsExportsParserPlugin.js b/node_modules/webpack/lib/dependencies/CommonJsExportsParserPlugin.js
new file mode 100644
index 00000000..ce3e998f
--- /dev/null
+++ b/node_modules/webpack/lib/dependencies/CommonJsExportsParserPlugin.js
@@ -0,0 +1,407 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const RuntimeGlobals = require("../RuntimeGlobals");
+const formatLocation = require("../formatLocation");
+const { evaluateToString } = require("../javascript/JavascriptParserHelpers");
+const propertyAccess = require("../util/propertyAccess");
+const CommonJsExportRequireDependency = require("./CommonJsExportRequireDependency");
+const CommonJsExportsDependency = require("./CommonJsExportsDependency");
+const CommonJsSelfReferenceDependency = require("./CommonJsSelfReferenceDependency");
+const DynamicExports = require("./DynamicExports");
+const HarmonyExports = require("./HarmonyExports");
+const ModuleDecoratorDependency = require("./ModuleDecoratorDependency");
+
+/** @typedef {import("estree").AssignmentExpression} AssignmentExpression */
+/** @typedef {import("estree").CallExpression} CallExpression */
+/** @typedef {import("estree").Expression} Expression */
+/** @typedef {import("estree").Super} Super */
+
+/** @typedef {import("../ModuleGraph")} ModuleGraph */
+/** @typedef {import("../NormalModule")} NormalModule */
+/** @typedef {import("../javascript/BasicEvaluatedExpression")} BasicEvaluatedExpression */
+/** @typedef {import("../javascript/JavascriptParser")} JavascriptParser */
+/** @typedef {import("./CommonJsDependencyHelpers").CommonJSDependencyBaseKeywords} CommonJSDependencyBaseKeywords */
+
+/**
+ * This function takes a generic expression and detects whether it is an ObjectExpression.
+ * This is used in the context of parsing CommonJS exports to get the value of the property descriptor
+ * when the `exports` object is assigned to `Object.defineProperty`.
+ *
+ * In CommonJS modules, the `exports` object can be assigned to `Object.defineProperty` and therefore
+ * webpack has to detect this case and get the value key of the property descriptor. See the following example
+ * for more information: https://astexplorer.net/#/gist/83ce51a4e96e59d777df315a6d111da6/8058ead48a1bb53c097738225db0967ef7f70e57
+ *
+ * This would be an example of a CommonJS module that exports an object with a property descriptor:
+ * ```js
+ * Object.defineProperty(exports, "__esModule", { value: true });
+ * exports.foo = void 0;
+ * exports.foo = "bar";
+ * ```
+ *
+ * @param {TODO} expr expression
+ * @returns {Expression | undefined} returns the value of property descriptor
+ */
+const getValueOfPropertyDescription = expr => {
+	if (expr.type !== "ObjectExpression") return;
+	for (const property of expr.properties) {
+		if (property.computed) continue;
+		const key = property.key;
+		if (key.type !== "Identifier" || key.name !== "value") continue;
+		return property.value;
+	}
+};
+
+/**
+ * The purpose of this function is to check whether an expression is a truthy literal or not. This is
+ * useful when parsing CommonJS exports, because CommonJS modules can export any value, including falsy
+ * values like `null` and `false`. However, exports should only be created if the exported value is truthy.
+ *
+ * @param {Expression} expr expression being checked
+ * @returns {boolean} true, when the expression is a truthy literal
+ *
+ */
+const isTruthyLiteral = expr => {
+	switch (expr.type) {
+		case "Literal":
+			return !!expr.value;
+		case "UnaryExpression":
+			if (expr.operator === "!") return isFalsyLiteral(expr.argument);
+	}
+	return false;
+};
+
+/**
+ * The purpose of this function is to check whether an expression is a falsy literal or not. This is
+ * useful when parsing CommonJS exports, because CommonJS modules can export any value, including falsy
+ * values like `null` and `false`. However, exports should only be created if the exported value is truthy.
+ *
+ * @param {Expression} expr expression being checked
+ * @returns {boolean} true, when the expression is a falsy literal
+ */
+const isFalsyLiteral = expr => {
+	switch (expr.type) {
+		case "Literal":
+			return !expr.value;
+		case "UnaryExpression":
+			if (expr.operator === "!") return isTruthyLiteral(expr.argument);
+	}
+	return false;
+};
+
+/**
+ * @param {JavascriptParser} parser the parser
+ * @param {Expression} expr expression
+ * @returns {{ argument: BasicEvaluatedExpression, ids: string[] } | undefined} parsed call
+ */
+const parseRequireCall = (parser, expr) => {
+	const ids = [];
+	while (expr.type === "MemberExpression") {
+		if (expr.object.type === "Super") return;
+		if (!expr.property) return;
+		const prop = expr.property;
+		if (expr.computed) {
+			if (prop.type !== "Literal") return;
+			ids.push(`${prop.value}`);
+		} else {
+			if (prop.type !== "Identifier") return;
+			ids.push(prop.name);
+		}
+		expr = expr.object;
+	}
+	if (expr.type !== "CallExpression" || expr.arguments.length !== 1) return;
+	const callee = expr.callee;
+	if (
+		callee.type !== "Identifier" ||
+		parser.getVariableInfo(callee.name) !== "require"
+	) {
+		return;
+	}
+	const arg = expr.arguments[0];
+	if (arg.type === "SpreadElement") return;
+	const argValue = parser.evaluateExpression(arg);
+	return { argument: argValue, ids: ids.reverse() };
+};
+
+class CommonJsExportsParserPlugin {
+	/**
+	 * @param {ModuleGraph} moduleGraph module graph
+	 */
+	constructor(moduleGraph) {
+		this.moduleGraph = moduleGraph;
+	}
+
+	/**
+	 * @param {JavascriptParser} parser the parser
+	 * @returns {void}
+	 */
+	apply(parser) {
+		const enableStructuredExports = () => {
+			DynamicExports.enable(parser.state);
+		};
+
+		/**
+		 * @param {boolean} topLevel true, when the export is on top level
+		 * @param {string[]} members members of the export
+		 * @param {Expression | undefined} valueExpr expression for the value
+		 * @returns {void}
+		 */
+		const checkNamespace = (topLevel, members, valueExpr) => {
+			if (!DynamicExports.isEnabled(parser.state)) return;
+			if (members.length > 0 && members[0] === "__esModule") {
+				if (valueExpr && isTruthyLiteral(valueExpr) && topLevel) {
+					DynamicExports.setFlagged(parser.state);
+				} else {
+					DynamicExports.setDynamic(parser.state);
+				}
+			}
+		};
+		/**
+		 * @param {string=} reason reason
+		 */
+		const bailout = reason => {
+			DynamicExports.bailout(parser.state);
+			if (reason) bailoutHint(reason);
+		};
+		/**
+		 * @param {string} reason reason
+		 */
+		const bailoutHint = reason => {
+			this.moduleGraph
+				.getOptimizationBailout(parser.state.module)
+				.push(`CommonJS bailout: ${reason}`);
+		};
+
+		// metadata //
+		parser.hooks.evaluateTypeof
+			.for("module")
+			.tap("CommonJsExportsParserPlugin", evaluateToString("object"));
+		parser.hooks.evaluateTypeof
+			.for("exports")
+			.tap("CommonJsPlugin", evaluateToString("object"));
+
+		// exporting //
+
+		/**
+		 * @param {AssignmentExpression} expr expression
+		 * @param {CommonJSDependencyBaseKeywords} base commonjs base keywords
+		 * @param {string[]} members members of the export
+		 * @returns {boolean} true, when the expression was handled
+		 */
+		const handleAssignExport = (expr, base, members) => {
+			if (HarmonyExports.isEnabled(parser.state)) return;
+			// Handle reexporting
+			const requireCall = parseRequireCall(parser, expr.right);
+			if (
+				requireCall &&
+				requireCall.argument.isString() &&
+				(members.length === 0 || members[0] !== "__esModule")
+			) {
+				enableStructuredExports();
+				// It's possible to reexport __esModule, so we must convert to a dynamic module
+				if (members.length === 0) DynamicExports.setDynamic(parser.state);
+				const dep = new CommonJsExportRequireDependency(
+					expr.range,
+					null,
+					base,
+					members,
+					requireCall.argument.string,
+					requireCall.ids,
+					!parser.isStatementLevelExpression(expr)
+				);
+				dep.loc = expr.loc;
+				dep.optional = !!parser.scope.inTry;
+				parser.state.module.addDependency(dep);
+				return true;
+			}
+			if (members.length === 0) return;
+			enableStructuredExports();
+			const remainingMembers = members;
+			checkNamespace(
+				parser.statementPath.length === 1 &&
+					parser.isStatementLevelExpression(expr),
+				remainingMembers,
+				expr.right
+			);
+			const dep = new CommonJsExportsDependency(
+				expr.left.range,
+				null,
+				base,
+				remainingMembers
+			);
+			dep.loc = expr.loc;
+			parser.state.module.addDependency(dep);
+			parser.walkExpression(expr.right);
+			return true;
+		};
+		parser.hooks.assignMemberChain
+			.for("exports")
+			.tap("CommonJsExportsParserPlugin", (expr, members) => {
+				return handleAssignExport(expr, "exports", members);
+			});
+		parser.hooks.assignMemberChain
+			.for("this")
+			.tap("CommonJsExportsParserPlugin", (expr, members) => {
+				if (!parser.scope.topLevelScope) return;
+				return handleAssignExport(expr, "this", members);
+			});
+		parser.hooks.assignMemberChain
+			.for("module")
+			.tap("CommonJsExportsParserPlugin", (expr, members) => {
+				if (members[0] !== "exports") return;
+				return handleAssignExport(expr, "module.exports", members.slice(1));
+			});
+		parser.hooks.call
+			.for("Object.defineProperty")
+			.tap("CommonJsExportsParserPlugin", expression => {
+				const expr = /** @type {CallExpression} */ (expression);
+				if (!parser.isStatementLevelExpression(expr)) return;
+				if (expr.arguments.length !== 3) return;
+				if (expr.arguments[0].type === "SpreadElement") return;
+				if (expr.arguments[1].type === "SpreadElement") return;
+				if (expr.arguments[2].type === "SpreadElement") return;
+				const exportsArg = parser.evaluateExpression(expr.arguments[0]);
+				if (!exportsArg.isIdentifier()) return;
+				if (
+					exportsArg.identifier !== "exports" &&
+					exportsArg.identifier !== "module.exports" &&
+					(exportsArg.identifier !== "this" || !parser.scope.topLevelScope)
+				) {
+					return;
+				}
+				const propertyArg = parser.evaluateExpression(expr.arguments[1]);
+				const property = propertyArg.asString();
+				if (typeof property !== "string") return;
+				enableStructuredExports();
+				const descArg = expr.arguments[2];
+				checkNamespace(
+					parser.statementPath.length === 1,
+					[property],
+					getValueOfPropertyDescription(descArg)
+				);
+				const dep = new CommonJsExportsDependency(
+					expr.range,
+					expr.arguments[2].range,
+					`Object.defineProperty(${exportsArg.identifier})`,
+					[property]
+				);
+				dep.loc = expr.loc;
+				parser.state.module.addDependency(dep);
+
+				parser.walkExpression(expr.arguments[2]);
+				return true;
+			});
+
+		// Self reference //
+
+		/**
+		 * @param {Expression | Super} expr expression
+		 * @param {CommonJSDependencyBaseKeywords} base commonjs base keywords
+		 * @param {string[]} members members of the export
+		 * @param {CallExpression=} call call expression
+		 * @returns {boolean | void} true, when the expression was handled
+		 */
+		const handleAccessExport = (expr, base, members, call = undefined) => {
+			if (HarmonyExports.isEnabled(parser.state)) return;
+			if (members.length === 0) {
+				bailout(`${base} is used directly at ${formatLocation(expr.loc)}`);
+			}
+			if (call && members.length === 1) {
+				bailoutHint(
+					`${base}${propertyAccess(
+						members
+					)}(...) prevents optimization as ${base} is passed as call context at ${formatLocation(
+						expr.loc
+					)}`
+				);
+			}
+			const dep = new CommonJsSelfReferenceDependency(
+				expr.range,
+				base,
+				members,
+				!!call
+			);
+			dep.loc = expr.loc;
+			parser.state.module.addDependency(dep);
+			if (call) {
+				parser.walkExpressions(call.arguments);
+			}
+			return true;
+		};
+		parser.hooks.callMemberChain
+			.for("exports")
+			.tap("CommonJsExportsParserPlugin", (expr, members) => {
+				return handleAccessExport(expr.callee, "exports", members, expr);
+			});
+		parser.hooks.expressionMemberChain
+			.for("exports")
+			.tap("CommonJsExportsParserPlugin", (expr, members) => {
+				return handleAccessExport(expr, "exports", members);
+			});
+		parser.hooks.expression
+			.for("exports")
+			.tap("CommonJsExportsParserPlugin", expr => {
+				return handleAccessExport(expr, "exports", []);
+			});
+		parser.hooks.callMemberChain
+			.for("module")
+			.tap("CommonJsExportsParserPlugin", (expr, members) => {
+				if (members[0] !== "exports") return;
+				return handleAccessExport(
+					expr.callee,
+					"module.exports",
+					members.slice(1),
+					expr
+				);
+			});
+		parser.hooks.expressionMemberChain
+			.for("module")
+			.tap("CommonJsExportsParserPlugin", (expr, members) => {
+				if (members[0] !== "exports") return;
+				return handleAccessExport(expr, "module.exports", members.slice(1));
+			});
+		parser.hooks.expression
+			.for("module.exports")
+			.tap("CommonJsExportsParserPlugin", expr => {
+				return handleAccessExport(expr, "module.exports", []);
+			});
+		parser.hooks.callMemberChain
+			.for("this")
+			.tap("CommonJsExportsParserPlugin", (expr, members) => {
+				if (!parser.scope.topLevelScope) return;
+				return handleAccessExport(expr.callee, "this", members, expr);
+			});
+		parser.hooks.expressionMemberChain
+			.for("this")
+			.tap("CommonJsExportsParserPlugin", (expr, members) => {
+				if (!parser.scope.topLevelScope) return;
+				return handleAccessExport(expr, "this", members);
+			});
+		parser.hooks.expression
+			.for("this")
+			.tap("CommonJsExportsParserPlugin", expr => {
+				if (!parser.scope.topLevelScope) return;
+				return handleAccessExport(expr, "this", []);
+			});
+
+		// Bailouts //
+		parser.hooks.expression.for("module").tap("CommonJsPlugin", expr => {
+			bailout();
+			const isHarmony = HarmonyExports.isEnabled(parser.state);
+			const dep = new ModuleDecoratorDependency(
+				isHarmony
+					? RuntimeGlobals.harmonyModuleDecorator
+					: RuntimeGlobals.nodeModuleDecorator,
+				!isHarmony
+			);
+			dep.loc = expr.loc;
+			parser.state.module.addDependency(dep);
+			return true;
+		});
+	}
+}
+module.exports = CommonJsExportsParserPlugin;