Merge pull request #74231 from microsoft/rebornix/bettermerge

Show context for diff view of merge conflict and introduce compareAll.

extensions/merge-conflict/package.json

@@ -114,6 +114,16 @@
           "type": "boolean",
           "description": "%config.autoNavigateNextConflictEnabled%",
           "default": false
+        },
+        "merge-conflict.diffViewPosition": {
+          "type": "string",
+          "enum": [
+            "Current",
+            "Beside",
+            "Below"
+          ],
+          "description": "%config.diffViewPosition%",
+          "default": "Current"
         }
       }
     }

extensions/merge-conflict/package.nls.json

@@ -15,5 +15,6 @@
 	"config.title": "Merge Conflict",
 	"config.autoNavigateNextConflictEnabled": "Whether to automatically navigate to the next merge conflict after resolving a merge conflict.",
 	"config.codeLensEnabled": "Create a Code Lens for merge conflict blocks within editor.",
-	"config.decoratorsEnabled": "Create decorators for merge conflict blocks within editor."
+	"config.decoratorsEnabled": "Create decorators for merge conflict blocks within editor.",
+	"config.diffViewPosition": "Controls where the diff view should be opened when comparing changes in merge conflicts."
 }

extensions/merge-conflict/src/commandHandler.ts

@@ -88,18 +88,54 @@ export default class CommandHandler implements vscode.Disposable {
 			}
 		}
 
+		const conflicts = await this.tracker.getConflicts(editor.document);
+
+		// Still failed to find conflict, warn the user and exit
+		if (!conflicts) {
+			vscode.window.showWarningMessage(localize('cursorNotInConflict', 'Editor cursor is not within a merge conflict'));
+			return;
+		}
+
 		const scheme = editor.document.uri.scheme;
 		let range = conflict.current.content;
+		let leftRanges = conflicts.map(conflict => [conflict.current.content, conflict.range]);
+		let rightRanges = conflicts.map(conflict => [conflict.incoming.content, conflict.range]);
+
 		const leftUri = editor.document.uri.with({
 			scheme: ContentProvider.scheme,
-			query: JSON.stringify({ scheme, range })
+			query: JSON.stringify({ scheme, range: range, ranges: leftRanges })
 		});
 
+
 		range = conflict.incoming.content;
-		const rightUri = leftUri.with({ query: JSON.stringify({ scheme, range }) });
+		const rightUri = leftUri.with({ query: JSON.stringify({ scheme, ranges: rightRanges }) });
+
+		let mergeConflictLineOffsets = 0;
+		for (let nextconflict of conflicts) {
+			if (nextconflict.range.isEqual(conflict.range)) {
+				break;
+			} else {
+				mergeConflictLineOffsets += (nextconflict.range.end.line - nextconflict.range.start.line) - (nextconflict.incoming.content.end.line - nextconflict.incoming.content.start.line);
+			}
+		}
+		const selection = new vscode.Range(
+			conflict.range.start.line - mergeConflictLineOffsets, conflict.range.start.character,
+			conflict.range.start.line - mergeConflictLineOffsets, conflict.range.start.character
+		);
 
 		const title = localize('compareChangesTitle', '{0}: Current Changes ⟷ Incoming Changes', fileName);
-		vscode.commands.executeCommand('vscode.diff', leftUri, rightUri, title);
+		const mergeConflictConfig = vscode.workspace.getConfiguration('merge-conflict');
+		const openToTheSide = mergeConflictConfig.get<string>('diffViewPosition');
+		const opts: vscode.TextDocumentShowOptions = {
+			viewColumn: openToTheSide === 'Beside' ? vscode.ViewColumn.Beside : vscode.ViewColumn.Active,
+			selection
+		};
+
+		if (openToTheSide === 'Below') {
+			await vscode.commands.executeCommand('workbench.action.newGroupBelow');
+		}
+
+		await vscode.commands.executeCommand('vscode.diff', leftUri, rightUri, title, opts);
 	}
 
 	navigateNext(editor: vscode.TextEditor): Promise<void> {

extensions/merge-conflict/src/contentProvider.ts

@@ -23,11 +23,27 @@ export default class MergeConflictContentProvider implements vscode.TextDocument
 
 	async provideTextDocumentContent(uri: vscode.Uri): Promise<string | null> {
 		try {
-			const { scheme, range } = JSON.parse(uri.query) as { scheme: string; range: { line: number, character: number }[] };
-			const [start, end] = range;
+			const { scheme, ranges } = JSON.parse(uri.query) as { scheme: string, ranges: [{ line: number, character: number }[], { line: number, character: number }[]][] };
 
+			// complete diff
 			const document = await vscode.workspace.openTextDocument(uri.with({ scheme, query: '' }));
-			const text = document.getText(new vscode.Range(start.line, start.character, end.line, end.character));
+
+			let text = '';
+			let lastPosition = new vscode.Position(0, 0);
+
+			ranges.forEach(rangeObj => {
+				let [conflictRange, fullRange] = rangeObj;
+				const [start, end] = conflictRange;
+				const [fullStart, fullEnd] = fullRange;
+
+				text += document.getText(new vscode.Range(lastPosition.line, lastPosition.character, fullStart.line, fullStart.character));
+				text += document.getText(new vscode.Range(start.line, start.character, end.line, end.character));
+				lastPosition = new vscode.Position(fullEnd.line, fullEnd.character);
+			});
+
+			let documentEnd = document.lineAt(document.lineCount - 1).range.end;
+			text += document.getText(new vscode.Range(lastPosition.line, lastPosition.character, documentEnd.line, documentEnd.character));
+
 			return text;
 		}
 		catch (ex) {