add hw2

node_modules/langium/lib/workspace/configuration.js

@@ -0,0 +1,92 @@
+/******************************************************************************
+ * Copyright 2022 TypeFox GmbH
+ * This program and the accompanying materials are made available under the
+ * terms of the MIT License, which is available in the project root.
+ ******************************************************************************/
+import { Emitter } from '../utils/event.js';
+import { Deferred } from '../utils/promise-utils.js';
+/**
+ * Base configuration provider for building up other configuration providers
+ */
+export class DefaultConfigurationProvider {
+    constructor(services) {
+        this._ready = new Deferred();
+        this.settings = {};
+        this.workspaceConfig = false;
+        this.onConfigurationSectionUpdateEmitter = new Emitter();
+        this.serviceRegistry = services.ServiceRegistry;
+    }
+    get ready() {
+        return this._ready.promise;
+    }
+    initialize(params) {
+        var _a, _b;
+        this.workspaceConfig = (_b = (_a = params.capabilities.workspace) === null || _a === void 0 ? void 0 : _a.configuration) !== null && _b !== void 0 ? _b : false;
+    }
+    async initialized(params) {
+        if (this.workspaceConfig) {
+            if (params.register) {
+                // params.register(...) is a function to be provided by the calling language server for the sake of
+                //  decoupling this implementation from the concrete LSP implementations, specifically the LSP Connection
+                const languages = this.serviceRegistry.all;
+                params.register({
+                    // Listen to configuration changes for all languages
+                    section: languages.map(lang => this.toSectionName(lang.LanguageMetaData.languageId))
+                });
+            }
+            if (params.fetchConfiguration) {
+                // params.fetchConfiguration(...) is a function to be provided by the calling language server for the sake of
+                //  decoupling this implementation from the concrete LSP implementations, specifically the LSP Connection
+                const configToUpdate = this.serviceRegistry.all.map(lang => ({
+                    // Fetch the configuration changes for all languages
+                    section: this.toSectionName(lang.LanguageMetaData.languageId)
+                }));
+                // get workspace configurations (default scope URI)
+                const configs = await params.fetchConfiguration(configToUpdate);
+                configToUpdate.forEach((conf, idx) => {
+                    this.updateSectionConfiguration(conf.section, configs[idx]);
+                });
+            }
+        }
+        this._ready.resolve();
+    }
+    /**
+     *  Updates the cached configurations using the `change` notification parameters.
+     *
+     * @param change The parameters of a change configuration notification.
+     * `settings` property of the change object could be expressed as `Record<string, Record<string, any>>`
+     */
+    updateConfiguration(change) {
+        if (!change.settings) {
+            return;
+        }
+        Object.keys(change.settings).forEach(section => {
+            const configuration = change.settings[section];
+            this.updateSectionConfiguration(section, configuration);
+            this.onConfigurationSectionUpdateEmitter.fire({ section, configuration });
+        });
+    }
+    updateSectionConfiguration(section, configuration) {
+        this.settings[section] = configuration;
+    }
+    /**
+    * Returns a configuration value stored for the given language.
+    *
+    * @param language The language id
+    * @param configuration Configuration name
+    */
+    async getConfiguration(language, configuration) {
+        await this.ready;
+        const sectionName = this.toSectionName(language);
+        if (this.settings[sectionName]) {
+            return this.settings[sectionName][configuration];
+        }
+    }
+    toSectionName(languageId) {
+        return `${languageId}`;
+    }
+    get onConfigurationSectionUpdate() {
+        return this.onConfigurationSectionUpdateEmitter.event;
+    }
+}
+//# sourceMappingURL=configuration.js.map