Explicit workspace behaviour

package.json

@@ -94,8 +94,7 @@
           "id": "workspaceViewer",
           "name": "Workspace",
           "icon": "./images/Rlogo.svg",
-          "contextualTitle": "R",
-          "when": "r.WorkspaceViewer:show"
+          "contextualTitle": "R"
         },
         {
           "id": "rHelpPages",
@@ -117,7 +116,8 @@
     "viewsWelcome": [
       {
         "view": "workspaceViewer",
-        "contents": "R workspace is empty."
+        "when": "!r.WorkspaceViewer:show",
+        "contents": "R workspace viewer requires that the [session watcher be enabled](https://github.com/REditorSupport/vscode-R/wiki/R-Session-watcher)."
       },
       {
         "view": "rHelpPages",
@@ -1246,22 +1246,22 @@
         {
           "command": "r.workspaceViewer.load",
           "group": "navigation@0",
-          "when": "view == workspaceViewer && !r.liveShare:isGuest"
+          "when": "r.WorkspaceViewer:show && view == workspaceViewer && !r.liveShare:isGuest"
         },
         {
           "command": "r.workspaceViewer.save",
           "group": "navigation@1",
-          "when": "view == workspaceViewer && !r.liveShare:isGuest"
+          "when": "r.WorkspaceViewer:show && view == workspaceViewer && !r.liveShare:isGuest"
         },
         {
           "command": "r.workspaceViewer.clear",
           "group": "navigation@2",
-          "when": "view == workspaceViewer"
+          "when": "r.WorkspaceViewer:show && view == workspaceViewer"
         },
         {
           "command": "r.workspaceViewer.refreshEntry",
           "group": "navigation@3",
-          "when": "view == workspaceViewer"
+          "when": "r.WorkspaceViewer:show && view == workspaceViewer"
         },
         {
           "command": "r.helpPanel.showQuickPick",

src/extension.ts

@@ -53,7 +53,7 @@ export async function activate(context: vscode.ExtensionContext): Promise<apiImp
     extensionContext = context;
 
     // assign session watcher setting to global variable
-    enableSessionWatcher = util.config().get<boolean>('sessionWatcher');
+    enableSessionWatcher = util.config().get<boolean>('sessionWatcher') ?? false;
     rmdPreviewManager = new rmarkdown.RMarkdownPreviewManager();
     rmdKnitManager = new rmarkdown.RMarkdownKnitManager();
 
@@ -133,8 +133,8 @@ export async function activate(context: vscode.ExtensionContext): Promise<apiImp
 
         // workspace viewer
         'r.workspaceViewer.refreshEntry': () => rWorkspace?.refresh(),
-        'r.workspaceViewer.view': (node: workspaceViewer.GlobalEnvItem) => node.label && workspaceViewer.viewItem(node.label),
-        'r.workspaceViewer.remove': (node: workspaceViewer.GlobalEnvItem) => node.label && workspaceViewer.removeItem(node.label),
+        'r.workspaceViewer.view': (node: workspaceViewer.GlobalEnvItem) => node?.label && workspaceViewer.viewItem(node.label),
+        'r.workspaceViewer.remove': (node: workspaceViewer.GlobalEnvItem) => node?.label && workspaceViewer.removeItem(node.label),
         'r.workspaceViewer.clear': workspaceViewer.clearWorkspace,
         'r.workspaceViewer.load': workspaceViewer.loadWorkspace,
         'r.workspaceViewer.save': workspaceViewer.saveWorkspace,
@@ -242,17 +242,13 @@ export async function activate(context: vscode.ExtensionContext): Promise<apiImp
         // creates a custom context value for the workspace view
         // only shows view when session watcher is enabled
         rWorkspace = new workspaceViewer.WorkspaceDataProvider();
-        vscode.window.registerTreeDataProvider(
-            'workspaceViewer',
-            rWorkspace
-        );
-        void vscode.commands.executeCommand('setContext', 'r.WorkspaceViewer:show', enableSessionWatcher);
 
         // if session watcher is active, register dyamic completion provider
         const liveTriggerCharacters = ['', '[', '(', ',', '$', '@', '"', '\''];
         vscode.languages.registerCompletionItemProvider(['r', 'rmd'], new completions.LiveCompletionItemProvider(), ...liveTriggerCharacters);
     }
 
+    void vscode.commands.executeCommand('setContext', 'r.WorkspaceViewer:show', enableSessionWatcher);
 
     return rExtension;
 }

src/workspaceViewer.ts

@@ -61,6 +61,8 @@ export class WorkspaceDataProvider implements TreeDataProvider<TreeItem> {
                 await node.showQuickPick();
             })
         );
+
+        vscode.window.registerTreeDataProvider('workspaceViewer', this);
     }
 
     public getTreeItem(element: TreeItem): TreeItem {
@@ -172,7 +174,7 @@ export class WorkspaceDataProvider implements TreeDataProvider<TreeItem> {
 }
 
 class PackageItem extends TreeItem {
-    public static command : string = 'r.workspaceViewer.package.showQuickPick';
+    public static command: string = 'r.workspaceViewer.package.showQuickPick';
     public label?: string;
     public name: string;
     public pkgNode?: PackageNode;
@@ -258,7 +260,7 @@ export class GlobalEnvItem extends TreeItem {
     }
 
     private getTooltip(
-        label:string,
+        label: string,
         rClass: string,
         size?: number,
         treeLevel?: number
@@ -291,7 +293,7 @@ export class GlobalEnvItem extends TreeItem {
     of what elements can have have 'child' nodes os not. It can be expanded
     in the futere for more tree levels.*/
     private static setCollapsibleState(treeLevel: number, type: string, str: string): vscode.TreeItemCollapsibleState {
-        if (treeLevel === TreeLevel.Parent && collapsibleTypes.includes(type) && str.includes('\n')){
+        if (treeLevel === TreeLevel.Parent && collapsibleTypes.includes(type) && str.includes('\n')) {
             return TreeItemCollapsibleState.Collapsed;
         } else {
             return TreeItemCollapsibleState.None;