feat: integrate extension with bulk git blame

Author: mishraprafful

src/extension.ts

@@ -1,6 +1,7 @@
 import * as vscode from "vscode";
 import * as cp from "child_process";
 import { throttle } from "throttle-debounce";
+import { fetchFileBlame, CommitInfo } from "./git"; 
 
 import {
   parseGitBlamePorcelain,
@@ -15,11 +16,14 @@ const decorationType = vscode.window.createTextEditorDecorationType({
   },
 });
 
+const FileCommits: Map<string, CommitInfo[]> = new Map();
+
 function showDecoration(e: { readonly textEditor: vscode.TextEditor }) {
   const editor = e.textEditor;
   const document = editor.document;
   const activeLine = document.lineAt(editor.selection.active.line);
   const { uri: file, isDirty } = document;
+  
 
   const command = "git";
   const n = activeLine.lineNumber;
@@ -29,6 +33,17 @@ function showDecoration(e: { readonly textEditor: vscode.TextEditor }) {
     args.push("--content", "-");
   }
 
+
+  const commitInfos = FileCommits.get(file.fsPath);
+  if (commitInfos !== undefined) {
+    const thiscommitInfo = commitInfos.find(info => info.lineNumber === n);
+    // TODO: get values of fields from thiscommitInfo
+
+  }
+  else {
+    console.log(`No pre-fetched commit information found for ${file.fsPath}`);
+    // TODO: move obsolete logic from down below here if the commitInfos is not found
+  }  
   const workspaceFolder = vscode.workspace.getWorkspaceFolder(file);
   const workspaceFolderPath = workspaceFolder?.uri.fsPath;
   const options = { cwd: workspaceFolderPath };
@@ -73,12 +88,41 @@ function showDecoration(e: { readonly textEditor: vscode.TextEditor }) {
   });
 }
 
+function showFileBlame(e: { readonly textEditor: vscode.TextEditor }) {
+
+  const editor = e.textEditor;
+  const document = editor.document;
+  const { uri: file, isDirty } = document;
+  
+  fetchFileBlame(file.fsPath)
+    .then(commitInfos => {
+      console.log(`Commit Information for ${file.fsPath}`); 
+      console.log(commitInfos);
+      FileCommits.set(file.fsPath, commitInfos);
+    })
+
+}
 export function activate(context: vscode.ExtensionContext) {
   console.log('Extension "git-line-blame" has activated.');
   let showDecorationThrottled = throttle(100, showDecoration);
   context.subscriptions.push(
     vscode.window.onDidChangeTextEditorSelection(showDecorationThrottled),
     vscode.window.onDidChangeTextEditorVisibleRanges(showDecorationThrottled),
+    vscode.window.onDidChangeActiveTextEditor((e) => {
+      const editor = vscode.window.activeTextEditor;
+      if (editor !== undefined && e === editor) {
+          showFileBlame({ textEditor: editor })
+      }
+    }),
+    vscode.window.onDidChangeVisibleTextEditors(editors => {
+        const closedEditors = vscode.window.visibleTextEditors.filter(editor =>
+            !editors.includes(editor)
+        );
+        closedEditors.forEach(closedEditor => {
+            console.log(`Closed file: ${closedEditor.document.fileName}`);
+            FileCommits.delete(closedEditor.document.fileName);
+        });
+    }),
     vscode.workspace.onDidSaveTextDocument((e) => {
       const editor = vscode.window.activeTextEditor;
       if (editor !== undefined && e === editor.document) {