Add file selection history feature

Author: Thomas

README.md

@@ -12,6 +12,7 @@ Copy file contents in XML format for LLM prompts effortlessly.
 - **Custom System Message**: Optionally include a system message in your copied output, encapsulated within a `<systemMessage>` XML element.
 - **Configurable Shortcuts**: Quickly refresh the file tree or copy files using customizable keyboard shortcuts.
 - **Git Ignore Support**: Automatically ignores files and directories specified in your .gitignore.
+- **Selection History**: Quickly switch between sets of previously selected files.
 
 ## Installation
 

package.json

@@ -3,7 +3,7 @@
   "displayName": "Files2Prompt",
   "icon": "./files2prompt-icon.webp",
   "description": "Copy file contents for LLM prompts",
-  "version": "1.2.0",
+  "version": "1.3.0",
   "publisher": "thomas-mckanna",
   "keywords": [
     "files",
@@ -23,7 +23,7 @@
     "Other"
   ],
   "activationEvents": [
-    "onView.files2prompView"
+    "onView.files2PromptView"
   ],
   "main": "./out/extension.js",
   "contributes": {
@@ -68,6 +68,22 @@
           "light": "resources/light/clear.svg",
           "dark": "resources/dark/clear.svg"
         }
+      },
+      {
+        "command": "files2prompt.goBack",
+        "title": "Go Back",
+        "icon": {
+          "light": "resources/light/back.svg",
+          "dark": "resources/dark/back.svg"
+        }
+      },
+      {
+        "command": "files2prompt.goForward",
+        "title": "Go Forward",
+        "icon": {
+          "light": "resources/light/forward.svg",
+          "dark": "resources/dark/forward.svg"
+        }
       }
     ],
     "menus": {
@@ -86,6 +102,16 @@
           "command": "files2prompt.clearChecks",
           "when": "view == files2PromptView",
           "group": "navigation@3"
+        },
+        {
+          "command": "files2prompt.goBack",
+          "when": "view == files2PromptView",
+          "group": "navigation@4"
+        },
+        {
+          "command": "files2prompt.goForward",
+          "when": "view == files2PromptView",
+          "group": "navigation@5"
         }
       ]
     },

resources/dark/back.svg

@@ -3,7 +3,7 @@
 import * as vscode from "vscode";
 import * as fs from "fs";
 import * as path from "path";
-import { FileTreeProvider, FileItem } from "./fileTreeProvider";
+import { FileTreeProvider } from "./fileTreeProvider";
 
 export function activate(context: vscode.ExtensionContext) {
   const workspaceFolders = vscode.workspace.workspaceFolders;
@@ -17,6 +17,9 @@ export function activate(context: vscode.ExtensionContext) {
       manageCheckboxStateManually: true,
     });
 
+    let history: string[][] = [];
+    let historyPosition: number = -1;
+
     context.subscriptions.push(
       vscode.commands.registerCommand("files2prompt.refresh", () =>
         fileTreeProvider.refresh()
@@ -29,6 +32,17 @@ export function activate(context: vscode.ExtensionContext) {
           return;
         }
 
+        // Before saving the current selection to history, check if it's the same as the last selection
+        const lastSelection = history[historyPosition] || [];
+        if (!arraysEqual(checkedFiles, lastSelection)) {
+          // Save the current selection to the history
+          if (historyPosition < history.length - 1) {
+            history = history.slice(0, historyPosition + 1);
+          }
+          history.push([...checkedFiles]); // Save a copy of the current selection
+          historyPosition++;
+        }
+
         const xmlOutput = await generateXmlOutput(checkedFiles);
 
         // Include system message if provided
@@ -53,8 +67,35 @@ export function activate(context: vscode.ExtensionContext) {
       vscode.commands.registerCommand("files2prompt.clearChecks", () => {
         fileTreeProvider.clearChecks();
         vscode.window.showInformationMessage("All checks have been cleared.");
+      }),
+      vscode.commands.registerCommand("files2prompt.goBack", async () => {
+        if (historyPosition > 0) {
+          historyPosition--;
+          const previousSelection = history[historyPosition];
+
+          // Update the file selections in the FileTreeProvider
+          await fileTreeProvider.setCheckedFiles(previousSelection);
+        } else {
+          // Show warning message
+          vscode.window.showWarningMessage(
+            "No previous selection to go back to."
+          );
+        }
+      }),
+      vscode.commands.registerCommand("files2prompt.goForward", async () => {
+        if (historyPosition < history.length - 1) {
+          historyPosition++;
+          const nextSelection = history[historyPosition];
+
+          // Update the file selections in the FileTreeProvider
+          await fileTreeProvider.setCheckedFiles(nextSelection);
+        } else {
+          // Show warning message
+          vscode.window.showWarningMessage(
+            "No next selection to go forward to."
+          );
+        }
       })
-      // Add keybindings if necessary (optional)
     );
 
     // Handle checkbox state changes asynchronously
@@ -97,3 +138,14 @@ async function generateXmlOutput(filePaths: string[]): Promise<string> {
 
   return `<files>\n${xmlContent}</files>`;
 }
+
+// Helper function to compare arrays of strings
+function arraysEqual(a: string[], b: string[]): boolean {
+  if (a.length !== b.length) return false;
+  const sortedA = [...a].sort();
+  const sortedB = [...b].sort();
+  for (let i = 0; i < sortedA.length; i++) {
+    if (sortedA[i] !== sortedB[i]) return false;
+  }
+  return true;
+}

resources/dark/forward.svg

@@ -30,6 +30,10 @@ export class FileTreeProvider implements vscode.TreeDataProvider<FileItem> {
   }
 
   getTreeItem(element: FileItem): vscode.TreeItem {
+    const key = element.resourceUri.fsPath;
+    const checkboxState =
+      this.checkedItems.get(key) ?? vscode.TreeItemCheckboxState.Unchecked;
+    element.checkboxState = checkboxState;
     return element;
   }
 
@@ -95,37 +99,40 @@ export class FileTreeProvider implements vscode.TreeDataProvider<FileItem> {
 
     if (item.isDirectory) {
       await this.updateDirectoryCheckState(key, state);
-    } else {
-      // If it's a file, update its parent directory's state
-      const parentDir = path.dirname(key);
-      await this.updateParentState(parentDir);
+    }
+
+    // Update parent directories' states
+    let dirPath = path.dirname(key);
+    while (dirPath.startsWith(this.workspaceRoot)) {
+      await this.updateParentState(dirPath);
+      dirPath = path.dirname(dirPath);
     }
 
     this.refresh();
   }
 
-  // Make updateParentState async
   private async updateParentState(dirPath: string): Promise<void> {
-    const parentKey = path.dirname(dirPath);
     const siblings = await fs.promises.readdir(dirPath);
 
-    const allChecked = await Promise.all(
-      siblings.map(async (sibling) => {
-        const siblingPath = path.join(dirPath, sibling);
-        const isIgnored = this.isGitIgnored(
-          path.relative(this.workspaceRoot, siblingPath)
-        );
-        if (isIgnored) return true; // Ignore ignored files in parent state
-        const state = this.checkedItems.get(siblingPath);
-        return state === vscode.TreeItemCheckboxState.Checked;
-      })
-    ).then((results) => results.every((res) => res));
+    let allChecked = true;
+
+    for (const sibling of siblings) {
+      const siblingPath = path.join(dirPath, sibling);
+      const isIgnored = this.isGitIgnored(
+        path.relative(this.workspaceRoot, siblingPath)
+      );
+      if (isIgnored) continue; // Ignore ignored files in parent state
+      const state =
+        this.checkedItems.get(siblingPath) ??
+        vscode.TreeItemCheckboxState.Unchecked;
+      if (state !== vscode.TreeItemCheckboxState.Checked) {
+        allChecked = false;
+        break;
+      }
+    }
 
     if (allChecked) {
       this.checkedItems.set(dirPath, vscode.TreeItemCheckboxState.Checked);
-      if (parentKey !== dirPath) {
-        await this.updateParentState(parentKey);
-      }
     } else {
       this.checkedItems.set(dirPath, vscode.TreeItemCheckboxState.Unchecked);
     }
@@ -166,7 +173,31 @@ export class FileTreeProvider implements vscode.TreeDataProvider<FileItem> {
     return Array.from(this.checkedItems.entries())
       .filter(([_, state]) => state === vscode.TreeItemCheckboxState.Checked)
       .map(([path, _]) => path)
-      .filter((path) => fs.statSync(path).isFile());
+      .filter((path) => fs.existsSync(path) && fs.statSync(path).isFile());
+  }
+
+  public async setCheckedFiles(filePaths: string[]): Promise<void> {
+    // Clear existing checks
+    this.checkedItems.clear();
+
+    // For each file in filePaths, set its checkboxState to Checked
+    for (const filePath of filePaths) {
+      if (fs.existsSync(filePath)) {
+        this.checkedItems.set(filePath, vscode.TreeItemCheckboxState.Checked);
+      }
+    }
+
+    // Update parent directories' checkbox states
+    for (const filePath of filePaths) {
+      let dirPath = path.dirname(filePath);
+      while (dirPath.startsWith(this.workspaceRoot)) {
+        await this.updateParentState(dirPath);
+        dirPath = path.dirname(dirPath);
+      }
+    }
+
+    // Refresh the tree view
+    this.refresh();
   }
 
   private loadGitignore() {