Use slash command instead of context drawer to display open files in editor to reduce flickering in the UI (#5858)

packages/cli/src/ui/commands/ideCommand.ts

@@ -11,7 +11,10 @@ import {
   getIdeDisplayName,
   getIdeInstaller,
   IdeClient,
+  type File,
+  ideContext,
 } from '@google/gemini-cli-core';
+import path from 'node:path';
 import {
   CommandContext,
   SlashCommand,
@@ -49,6 +52,70 @@ function getIdeStatusMessage(ideClient: IdeClient): {
   }
 }
 
+function formatFileList(openFiles: File[]): string {
+  const basenameCounts = new Map<string, number>();
+  for (const file of openFiles) {
+    const basename = path.basename(file.path);
+    basenameCounts.set(basename, (basenameCounts.get(basename) || 0) + 1);
+  }
+
+  const fileList = openFiles
+    .map((file: File) => {
+      const basename = path.basename(file.path);
+      const isDuplicate = (basenameCounts.get(basename) || 0) > 1;
+      const parentDir = path.basename(path.dirname(file.path));
+      const displayName = isDuplicate
+        ? `${basename} (/${parentDir})`
+        : basename;
+
+      return `  - ${displayName}${file.isActive ? ' (active)' : ''}`;
+    })
+    .join('\n');
+
+  return `\n\nOpen files:\n${fileList}`;
+}
+
+async function getIdeStatusMessageWithFiles(ideClient: IdeClient): Promise<{
+  messageType: 'info' | 'error';
+  content: string;
+}> {
+  const connection = ideClient.getConnectionStatus();
+  switch (connection.status) {
+    case IDEConnectionStatus.Connected: {
+      let content = `🟢 Connected to ${ideClient.getDetectedIdeDisplayName()}`;
+      try {
+        const context = await ideContext.getIdeContext();
+        const openFiles = context?.workspaceState?.openFiles;
+
+        if (openFiles && openFiles.length > 0) {
+          content += formatFileList(openFiles);
+        }
+      } catch (_e) {
+        // Ignore
+      }
+      return {
+        messageType: 'info',
+        content,
+      };
+    }
+    case IDEConnectionStatus.Connecting:
+      return {
+        messageType: 'info',
+        content: `🟡 Connecting...`,
+      };
+    default: {
+      let content = `🔴 Disconnected`;
+      if (connection?.details) {
+        content += `: ${connection.details}`;
+      }
+      return {
+        messageType: 'error',
+        content,
+      };
+    }
+  }
+}
+
 export const ideCommand = (config: Config | null): SlashCommand | null => {
   if (!config || !config.getIdeModeFeature()) {
     return null;
@@ -66,8 +133,7 @@ export const ideCommand = (config: Config | null): SlashCommand | null => {
           messageType: 'error',
           content: `IDE integration is not supported in your current environment. To use this feature, run Gemini CLI in one of these supported IDEs: ${Object.values(
             DetectedIde,
-          )
-            .map((ide) => getIdeDisplayName(ide))
+          ).map((ide) => getIdeDisplayName(ide))}
             .join(', ')}`,
         }) as const,
     };
@@ -84,8 +150,9 @@ export const ideCommand = (config: Config | null): SlashCommand | null => {
     name: 'status',
     description: 'check status of IDE integration',
     kind: CommandKind.BUILT_IN,
-    action: (): SlashCommandActionReturn => {
-      const { messageType, content } = getIdeStatusMessage(ideClient);
+    action: async (): Promise<SlashCommandActionReturn> => {
+      const { messageType, content } =
+        await getIdeStatusMessageWithFiles(ideClient);
       return {
         type: 'message',
         messageType,