Revert "remove entry of Copilot related features. (#1343)" in feature branch.

package.json

@@ -256,6 +256,32 @@
           "default": false,
           "description": "Whether to send back detailed information from error logs for diagnostic purpose.",
           "scope": "window"
+        },
+        "java.copilot.inspection.renderer": {
+            "type": "object",
+            "description": "How to display rewriting suggestions.",
+            "properties": {
+                "diagnostics": {
+                    "type": "boolean",
+                    "default": true,
+                    "description": "Hints (Diagnostics)"
+                },
+                "guttericons": {
+                    "type": "boolean",
+                    "default": false,
+                    "description": "Gutter Icons"
+                },
+                "codelenses": {
+                    "type": "boolean",
+                    "default": false,
+                    "description": "Code Lenses"
+                },
+                "rulerhighlights": {
+                    "type": "boolean",
+                    "default": true,
+                    "description": "Ruler Highlights (Scrollbar)"
+                }
+            }
         }
       }
     },

src/copilot/inspect/commands.ts

@@ -45,9 +45,9 @@ export function registerCommands(copilot: InspectionCopilot, renderer: DocumentR
         void commands.executeCommand('vscode.editorChat.start', {
             autoSend: true,
             message: `/fix ${problem.description}, maybe ${uncapitalize(solution)}`,
-            position: range?.start,
-            initialSelection: new Selection(range!.start, range!.start),
-            initialRange: new Range(range!.start, range!.start)
+            position: range.start,
+            initialSelection: new Selection(range.start, range.start),
+            initialRange: new Range(range.start, range.start)
         });
     });
 

src/copilot/inspect/render/DiagnosticRenderer.ts

@@ -51,7 +51,7 @@ export class DiagnosticRenderer implements InspectionRenderer {
 class InspectionDiagnostic extends Diagnostic {
     public constructor(public readonly inspection: Inspection) {
         const range = Inspection.getIndicatorRangeOfInspection(inspection.problem);
-        const severiy = inspection.severity.toUpperCase() === 'HIGH' ? DiagnosticSeverity.Information : DiagnosticSeverity.Hint;
+        const severiy = DiagnosticSeverity.Hint;
         super(range, inspection.problem.description, severiy);
         this.source = DIAGNOSTICS_GROUP;
     }

src/copilot/utils.ts

@@ -43,6 +43,9 @@ export async function getIntersectionSymbolsOfRange(range: Range | Selection, do
 }
 
 export function getUnionRange(symbols: SymbolNode[]): Range {
+    if (symbols.length === 0) {
+        throw new Error("No symbols provided");
+    }
     let result: Range = new Range(symbols[0].range.start, symbols[0].range.end);
     for (const symbol of symbols) {
         result = result.union(symbol.range);

src/extension.ts

@@ -83,6 +83,10 @@ async function initializeExtension(_operationId: string, context: vscode.Extensi
       vscode.commands.executeCommand("java.runtime");
     });
   }
+
+  if (isLlmApiReady()) {
+    activateCopilotInspection(context);
+  }
 }
 
 async function presentFirstView(context: vscode.ExtensionContext) {