Support context value of view nodes (#215)

Author: Vigilans

src/views/containerNode.ts

@@ -27,6 +27,10 @@ export class ContainerNode extends DataNode {
         return result;
     }
 
+    protected get contextValue(): string {
+        return `container/${this.name}`;
+    }
+
     protected get iconPath(): { light: string, dark: string } {
         return ExplorerNode.resolveIconPath("library");
     }

src/views/dataNode.ts

@@ -1,6 +1,7 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT license.
 
+import * as _ from "lodash";
 import { ProviderResult, ThemeIcon, TreeItem, TreeItemCollapsibleState, Uri } from "vscode";
 import { INodeData } from "../java/nodeData";
 import { ExplorerNode } from "./explorerNode";
@@ -15,6 +16,7 @@ export abstract class DataNode extends ExplorerNode {
             const item = new TreeItem(this._nodeData.name, this.hasChildren() ? TreeItemCollapsibleState.Collapsed : TreeItemCollapsibleState.None);
             item.iconPath = this.iconPath;
             item.command = this.command;
+            item.contextValue = this.computeContextValue();
             return item;
         }
     }
@@ -31,6 +33,10 @@ export abstract class DataNode extends ExplorerNode {
         return this._nodeData.path;
     }
 
+    public get name() { // return name like `referenced-library`
+        return _.kebabCase(this._nodeData.name);
+    }
+
     public async revealPaths(paths: INodeData[]): Promise<DataNode> {
         const childNodeData = paths.shift();
         const children: ExplorerNode[] = await this.getChildren();
@@ -49,6 +55,17 @@ export abstract class DataNode extends ExplorerNode {
         return this.createChildNodeList();
     }
 
+    protected computeContextValue(): string {
+        let contextValue = this.contextValue;
+        if (this.uri) {
+            contextValue = `${contextValue || ""}+uri`;
+        }
+        if (contextValue) {
+            contextValue = `java:${contextValue}`;
+        }
+        return contextValue;
+    }
+
     protected sort() {
         this.nodeData.children.sort((a: INodeData, b: INodeData) => {
             if (a.kind === b.kind) {
@@ -63,6 +80,10 @@ export abstract class DataNode extends ExplorerNode {
         return true;
     }
 
+    protected get contextValue(): string {
+        return undefined;
+    }
+
     protected abstract get iconPath(): string | Uri | { light: string | Uri; dark: string | Uri } | ThemeIcon;
 
     protected abstract loadData(): Thenable<any[]>;

src/views/packageRootNode.ts

@@ -4,6 +4,7 @@
 import { Jdtls } from "../java/jdtls";
 import { INodeData, NodeKind } from "../java/nodeData";
 import { IPackageRootNodeData, PackageRootKind } from "../java/packageRootNodeData";
+import { ContainerNode } from "./containerNode";
 import { DataNode } from "./dataNode";
 import { ExplorerNode } from "./explorerNode";
 import { FileNode } from "./fileNode";
@@ -41,6 +42,16 @@ export class PackageRootNode extends DataNode {
         return result;
     }
 
+    protected get contextValue(): string {
+        const data = <IPackageRootNodeData>this.nodeData;
+        if (data.entryKind === PackageRootKind.K_BINARY) {
+            const parent = <ContainerNode>this.getParent();
+            return `jar/${parent.name}`;
+        } else { // Currently PackageFolder does not use context value
+            return undefined;
+        }
+    }
+
     protected get iconPath(): { light: string; dark: string } {
         const data = <IPackageRootNodeData>this.nodeData;
         if (data.entryKind === PackageRootKind.K_BINARY) {