added hover prefixer

1 files changed, 377 insertions, 0 deletions

diff --git a/node_modules/webpack/lib/optimize/InnerGraphPlugin.js b/node_modules/webpack/lib/optimize/InnerGraphPlugin.js
new file mode 100644
index 00000000..f541030a
--- /dev/null
+++ b/node_modules/webpack/lib/optimize/InnerGraphPlugin.js
@@ -0,0 +1,377 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const {
+	JAVASCRIPT_MODULE_TYPE_AUTO,
+	JAVASCRIPT_MODULE_TYPE_ESM
+} = require("../ModuleTypeConstants");
+const PureExpressionDependency = require("../dependencies/PureExpressionDependency");
+const InnerGraph = require("./InnerGraph");
+
+/** @typedef {import("estree").ClassDeclaration} ClassDeclarationNode */
+/** @typedef {import("estree").ClassExpression} ClassExpressionNode */
+/** @typedef {import("estree").Node} Node */
+/** @typedef {import("estree").VariableDeclarator} VariableDeclaratorNode */
+/** @typedef {import("../../declarations/WebpackOptions").JavascriptParserOptions} JavascriptParserOptions */
+/** @typedef {import("../Compiler")} Compiler */
+/** @typedef {import("../Dependency")} Dependency */
+/** @typedef {import("../dependencies/HarmonyImportSpecifierDependency")} HarmonyImportSpecifierDependency */
+/** @typedef {import("../javascript/JavascriptParser")} JavascriptParser */
+/** @typedef {import("./InnerGraph").InnerGraph} InnerGraph */
+/** @typedef {import("./InnerGraph").TopLevelSymbol} TopLevelSymbol */
+
+const { topLevelSymbolTag } = InnerGraph;
+
+const PLUGIN_NAME = "InnerGraphPlugin";
+
+class InnerGraphPlugin {
+	/**
+	 * Apply the plugin
+	 * @param {Compiler} compiler the compiler instance
+	 * @returns {void}
+	 */
+	apply(compiler) {
+		compiler.hooks.compilation.tap(
+			PLUGIN_NAME,
+			(compilation, { normalModuleFactory }) => {
+				const logger = compilation.getLogger("webpack.InnerGraphPlugin");
+
+				compilation.dependencyTemplates.set(
+					PureExpressionDependency,
+					new PureExpressionDependency.Template()
+				);
+
+				/**
+				 * @param {JavascriptParser} parser the parser
+				 * @param {JavascriptParserOptions} parserOptions options
+				 * @returns {void}
+				 */
+				const handler = (parser, parserOptions) => {
+					const onUsageSuper = sup => {
+						InnerGraph.onUsage(parser.state, usedByExports => {
+							switch (usedByExports) {
+								case undefined:
+								case true:
+									return;
+								default: {
+									const dep = new PureExpressionDependency(sup.range);
+									dep.loc = sup.loc;
+									dep.usedByExports = usedByExports;
+									parser.state.module.addDependency(dep);
+									break;
+								}
+							}
+						});
+					};
+
+					parser.hooks.program.tap(PLUGIN_NAME, () => {
+						InnerGraph.enable(parser.state);
+					});
+
+					parser.hooks.finish.tap(PLUGIN_NAME, () => {
+						if (!InnerGraph.isEnabled(parser.state)) return;
+
+						logger.time("infer dependency usage");
+						InnerGraph.inferDependencyUsage(parser.state);
+						logger.timeAggregate("infer dependency usage");
+					});
+
+					// During prewalking the following datastructures are filled with
+					// nodes that have a TopLevelSymbol assigned and
+					// variables are tagged with the assigned TopLevelSymbol
+
+					// We differ 3 types of nodes:
+					// 1. full statements (export default, function declaration)
+					// 2. classes (class declaration, class expression)
+					// 3. variable declarators (const x = ...)
+
+					/** @type {WeakMap<Node, TopLevelSymbol>} */
+					const statementWithTopLevelSymbol = new WeakMap();
+					/** @type {WeakMap<Node, Node>} */
+					const statementPurePart = new WeakMap();
+
+					/** @type {WeakMap<ClassExpressionNode | ClassDeclarationNode, TopLevelSymbol>} */
+					const classWithTopLevelSymbol = new WeakMap();
+
+					/** @type {WeakMap<VariableDeclaratorNode, TopLevelSymbol>} */
+					const declWithTopLevelSymbol = new WeakMap();
+					/** @type {WeakSet<VariableDeclaratorNode>} */
+					const pureDeclarators = new WeakSet();
+
+					// The following hooks are used during prewalking:
+
+					parser.hooks.preStatement.tap(PLUGIN_NAME, statement => {
+						if (!InnerGraph.isEnabled(parser.state)) return;
+
+						if (parser.scope.topLevelScope === true) {
+							if (statement.type === "FunctionDeclaration") {
+								const name = statement.id ? statement.id.name : "*default*";
+								const fn = InnerGraph.tagTopLevelSymbol(parser, name);
+								statementWithTopLevelSymbol.set(statement, fn);
+								return true;
+							}
+						}
+					});
+
+					parser.hooks.blockPreStatement.tap(PLUGIN_NAME, statement => {
+						if (!InnerGraph.isEnabled(parser.state)) return;
+
+						if (parser.scope.topLevelScope === true) {
+							if (
+								statement.type === "ClassDeclaration" &&
+								parser.isPure(statement, statement.range[0])
+							) {
+								const name = statement.id ? statement.id.name : "*default*";
+								const fn = InnerGraph.tagTopLevelSymbol(parser, name);
+								classWithTopLevelSymbol.set(statement, fn);
+								return true;
+							}
+							if (statement.type === "ExportDefaultDeclaration") {
+								const name = "*default*";
+								const fn = InnerGraph.tagTopLevelSymbol(parser, name);
+								const decl = statement.declaration;
+								if (
+									(decl.type === "ClassExpression" ||
+										decl.type === "ClassDeclaration") &&
+									parser.isPure(decl, decl.range[0])
+								) {
+									classWithTopLevelSymbol.set(decl, fn);
+								} else if (parser.isPure(decl, statement.range[0])) {
+									statementWithTopLevelSymbol.set(statement, fn);
+									if (
+										!decl.type.endsWith("FunctionExpression") &&
+										!decl.type.endsWith("Declaration") &&
+										decl.type !== "Literal"
+									) {
+										statementPurePart.set(statement, decl);
+									}
+								}
+							}
+						}
+					});
+
+					parser.hooks.preDeclarator.tap(PLUGIN_NAME, (decl, statement) => {
+						if (!InnerGraph.isEnabled(parser.state)) return;
+						if (
+							parser.scope.topLevelScope === true &&
+							decl.init &&
+							decl.id.type === "Identifier"
+						) {
+							const name = decl.id.name;
+							if (
+								decl.init.type === "ClassExpression" &&
+								parser.isPure(decl.init, decl.id.range[1])
+							) {
+								const fn = InnerGraph.tagTopLevelSymbol(parser, name);
+								classWithTopLevelSymbol.set(decl.init, fn);
+							} else if (parser.isPure(decl.init, decl.id.range[1])) {
+								const fn = InnerGraph.tagTopLevelSymbol(parser, name);
+								declWithTopLevelSymbol.set(decl, fn);
+								if (
+									!decl.init.type.endsWith("FunctionExpression") &&
+									decl.init.type !== "Literal"
+								) {
+									pureDeclarators.add(decl);
+								}
+								return true;
+							}
+						}
+					});
+
+					// During real walking we set the TopLevelSymbol state to the assigned
+					// TopLevelSymbol by using the fill datastructures.
+
+					// In addition to tracking TopLevelSymbols, we sometimes need to
+					// add a PureExpressionDependency. This is needed to skip execution
+					// of pure expressions, even when they are not dropped due to
+					// minimizing. Otherwise symbols used there might not exist anymore
+					// as they are removed as unused by this optimization
+
+					// When we find a reference to a TopLevelSymbol, we register a
+					// TopLevelSymbol dependency from TopLevelSymbol in state to the
+					// referenced TopLevelSymbol. This way we get a graph of all
+					// TopLevelSymbols.
+
+					// The following hooks are called during walking:
+
+					parser.hooks.statement.tap(PLUGIN_NAME, statement => {
+						if (!InnerGraph.isEnabled(parser.state)) return;
+						if (parser.scope.topLevelScope === true) {
+							InnerGraph.setTopLevelSymbol(parser.state, undefined);
+
+							const fn = statementWithTopLevelSymbol.get(statement);
+							if (fn) {
+								InnerGraph.setTopLevelSymbol(parser.state, fn);
+								const purePart = statementPurePart.get(statement);
+								if (purePart) {
+									InnerGraph.onUsage(parser.state, usedByExports => {
+										switch (usedByExports) {
+											case undefined:
+											case true:
+												return;
+											default: {
+												const dep = new PureExpressionDependency(
+													purePart.range
+												);
+												dep.loc = statement.loc;
+												dep.usedByExports = usedByExports;
+												parser.state.module.addDependency(dep);
+												break;
+											}
+										}
+									});
+								}
+							}
+						}
+					});
+
+					parser.hooks.classExtendsExpression.tap(
+						PLUGIN_NAME,
+						(expr, statement) => {
+							if (!InnerGraph.isEnabled(parser.state)) return;
+							if (parser.scope.topLevelScope === true) {
+								const fn = classWithTopLevelSymbol.get(statement);
+								if (
+									fn &&
+									parser.isPure(
+										expr,
+										statement.id ? statement.id.range[1] : statement.range[0]
+									)
+								) {
+									InnerGraph.setTopLevelSymbol(parser.state, fn);
+									onUsageSuper(expr);
+								}
+							}
+						}
+					);
+
+					parser.hooks.classBodyElement.tap(
+						PLUGIN_NAME,
+						(element, classDefinition) => {
+							if (!InnerGraph.isEnabled(parser.state)) return;
+							if (parser.scope.topLevelScope === true) {
+								const fn = classWithTopLevelSymbol.get(classDefinition);
+								if (fn) {
+									InnerGraph.setTopLevelSymbol(parser.state, undefined);
+								}
+							}
+						}
+					);
+
+					parser.hooks.classBodyValue.tap(
+						PLUGIN_NAME,
+						(expression, element, classDefinition) => {
+							if (!InnerGraph.isEnabled(parser.state)) return;
+							if (parser.scope.topLevelScope === true) {
+								const fn = classWithTopLevelSymbol.get(classDefinition);
+								if (fn) {
+									if (
+										!element.static ||
+										parser.isPure(
+											expression,
+											element.key ? element.key.range[1] : element.range[0]
+										)
+									) {
+										InnerGraph.setTopLevelSymbol(parser.state, fn);
+										if (element.type !== "MethodDefinition" && element.static) {
+											InnerGraph.onUsage(parser.state, usedByExports => {
+												switch (usedByExports) {
+													case undefined:
+													case true:
+														return;
+													default: {
+														const dep = new PureExpressionDependency(
+															expression.range
+														);
+														dep.loc = expression.loc;
+														dep.usedByExports = usedByExports;
+														parser.state.module.addDependency(dep);
+														break;
+													}
+												}
+											});
+										}
+									} else {
+										InnerGraph.setTopLevelSymbol(parser.state, undefined);
+									}
+								}
+							}
+						}
+					);
+
+					parser.hooks.declarator.tap(PLUGIN_NAME, (decl, statement) => {
+						if (!InnerGraph.isEnabled(parser.state)) return;
+						const fn = declWithTopLevelSymbol.get(decl);
+
+						if (fn) {
+							InnerGraph.setTopLevelSymbol(parser.state, fn);
+							if (pureDeclarators.has(decl)) {
+								if (decl.init.type === "ClassExpression") {
+									if (decl.init.superClass) {
+										onUsageSuper(decl.init.superClass);
+									}
+								} else {
+									InnerGraph.onUsage(parser.state, usedByExports => {
+										switch (usedByExports) {
+											case undefined:
+											case true:
+												return;
+											default: {
+												const dep = new PureExpressionDependency(
+													decl.init.range
+												);
+												dep.loc = decl.loc;
+												dep.usedByExports = usedByExports;
+												parser.state.module.addDependency(dep);
+												break;
+											}
+										}
+									});
+								}
+							}
+							parser.walkExpression(decl.init);
+							InnerGraph.setTopLevelSymbol(parser.state, undefined);
+							return true;
+						}
+					});
+
+					parser.hooks.expression
+						.for(topLevelSymbolTag)
+						.tap(PLUGIN_NAME, () => {
+							const topLevelSymbol = /** @type {TopLevelSymbol} */ (
+								parser.currentTagData
+							);
+							const currentTopLevelSymbol = InnerGraph.getTopLevelSymbol(
+								parser.state
+							);
+							InnerGraph.addUsage(
+								parser.state,
+								topLevelSymbol,
+								currentTopLevelSymbol || true
+							);
+						});
+					parser.hooks.assign.for(topLevelSymbolTag).tap(PLUGIN_NAME, expr => {
+						if (!InnerGraph.isEnabled(parser.state)) return;
+						if (expr.operator === "=") return true;
+					});
+				};
+				normalModuleFactory.hooks.parser
+					.for(JAVASCRIPT_MODULE_TYPE_AUTO)
+					.tap(PLUGIN_NAME, handler);
+				normalModuleFactory.hooks.parser
+					.for(JAVASCRIPT_MODULE_TYPE_ESM)
+					.tap(PLUGIN_NAME, handler);
+
+				compilation.hooks.finishModules.tap(PLUGIN_NAME, () => {
+					logger.timeAggregateEnd("infer dependency usage");
+				});
+			}
+		);
+	}
+}
+
+module.exports = InnerGraphPlugin;