feature: add option to load libDoc

Author: noraeb

packages/compas-open-scd/src/open-scd.ts

@@ -41,6 +41,7 @@ import {
 } from '@openscd/open-scd/src/plugin.events.js';
 import { newLogEvent } from '@openscd/core/foundation/deprecated/history.js';
 import packageJson from '../package.json';
+import { CompasSclDataService } from './compas-services/CompasSclDataService.js';
 
 /** The `<open-scd>` custom element is the main entry point of the
  * Open Substation Configuration Designer. */
@@ -90,13 +91,6 @@ export class OpenSCD extends LitElement {
   /** The UUID of the current [[`doc`]] */
   @property({ type: String }) docId = '';
 
-  @state()
-  historyState: HistoryState = {
-    editCount: -1,
-    canRedo: false,
-    canUndo: false,
-  };
-
   /** Object containing all *.nsdoc files and a function extracting element's label form them*/
   @property({ attribute: false })
   nsdoc: Nsdoc = initializeNsdoc();
@@ -112,6 +106,13 @@ export class OpenSCD extends LitElement {
     this.dispatchEvent(newPendingStateEvent(this.loadDoc(value)));
   }
 
+  @state()
+  historyState: HistoryState = {
+    editCount: -1,
+    canRedo: false,
+    canUndo: false,
+  };
+
   @state() private storedPlugins: Plugin[] = [];
 
   /** Loads and parses an `XMLDocument` after [[`src`]] has changed. */
@@ -127,6 +128,18 @@ export class OpenSCD extends LitElement {
     if (src.startsWith('blob:')) URL.revokeObjectURL(src);
   }
 
+  /** Loads the LNodeTypeDB.ssd document from the CompasSclDataService */
+  private async loadLibDoc(e: CustomEvent): Promise<void> {
+    const doc = await CompasSclDataService()
+      .getSclDocument(this, 'SSD', '3942f511-7d87-4482-bff9-056a98c6ce15')
+      .catch(() => null);
+    if (doc instanceof Document) {
+      e.detail.callback(doc);
+    } else {
+      e.detail.callback(undefined);
+    }
+  }
+
   /**
    *
    * @deprecated Use `handleConfigurationPluginEvent` instead
@@ -434,6 +447,7 @@ export class OpenSCD extends LitElement {
               validator: plugin.kind === 'validator',
               editor: plugin.kind === 'editor',
             })}"
+            @request-libdoc=${(e: CustomEvent) => this.loadLibDoc(e)}
           ></${tag}>`;
       },
     };