Adds new recent changes annotations

src/annotations/recentChangesAnnotationProvider.ts

@@ -0,0 +1,61 @@
+'use strict';
+import { DecorationOptions, ExtensionContext, Position, Range, TextEditor, TextEditorDecorationType } from 'vscode';
+import { endOfLineIndex } from './annotations';
+import { FileAnnotationType } from './annotationController';
+import { AnnotationProviderBase } from './annotationProvider';
+import { CommitFormatter, GitService, GitUri } from '../gitService';
+
+export class RecentChangesAnnotationProvider extends AnnotationProviderBase {
+
+    constructor(context: ExtensionContext, editor: TextEditor, decoration: TextEditorDecorationType | undefined, highlightDecoration: TextEditorDecorationType | undefined, private git: GitService, private uri: GitUri) {
+        super(context, editor, decoration, highlightDecoration, undefined);
+    }
+
+    async provideAnnotation(shaOrLine?: string | number): Promise<boolean> {
+        this.annotationType = FileAnnotationType.RecentChanges;
+
+        const commit = await this.git.getLogCommit(this.uri.repoPath, this.uri.fsPath, { previous: true });
+        if (commit === undefined) return false;
+
+        const diff = await this.git.getDiffForFile(this.uri, commit.previousSha);
+        if (diff === undefined) return false;
+
+        const cfg = this._config.annotations.file.recentChanges;
+
+        const decorators: DecorationOptions[] = [];
+
+        for (const chunk of diff.chunks) {
+            let count = chunk.currentPosition.start - 2;
+            for (const change of chunk.current) {
+                if (change === undefined) continue;
+
+                count++;
+
+                if (change.state === 'unchanged') continue;
+
+                let endingIndex = 0;
+                let message: string | undefined = undefined;
+                if (cfg.hover.changes) {
+                    message = CommitFormatter.toHoverDiff(commit, chunk.previous[count], change);
+                    endingIndex = cfg.hover.wholeLine ? endOfLineIndex : this.editor.document.lineAt(count).firstNonWhitespaceCharacterIndex;
+                }
+
+                decorators.push({
+                    hoverMessage: message,
+                    range: this.editor.document.validateRange(new Range(new Position(count, 0), new Position(count, endingIndex)))
+                } as DecorationOptions);
+            }
+        }
+
+        this.editor.setDecorations(this.highlightDecoration!, decorators);
+
+        return true;
+    }
+
+    async selection(shaOrLine?: string | number): Promise<void> {
+    }
+
+    async validate(): Promise<boolean> {
+        return true;
+    }
+}