Fix references for copilot backing docs again (microsoft#213848)

Fixes microsoft/vscode-copilot-release#1055

Author: mjbvz

src/vs/base/common/network.ts

@@ -74,8 +74,15 @@ export namespace Schemas {
 
 	/** Scheme used for code blocks in chat. */
 	export const vscodeChatCodeBlock = 'vscode-chat-code-block';
+
+	/**
+	 * Scheme used for backing documents created by copilot for chat.
+	 */
+	export const vscodeCopilotBackingChatCodeBlock = 'vscode-copilot-chat-code-block';
+
 	/** Scheme used for LHS of code compare (aka diff) blocks in chat. */
 	export const vscodeChatCodeCompareBlock = 'vscode-chat-code-compare-block';
+
 	/** Scheme used for the chat input editor. */
 	export const vscodeChatSesssion = 'vscode-chat-editor';
 

src/vs/editor/contrib/gotoSymbol/browser/goToSymbol.ts

@@ -22,7 +22,7 @@ function shouldIncludeLocationLink(sourceModel: ITextModel, loc: LocationLink):
 	}
 
 	// Otherwise filter out locations from internal schemes
-	if (matchesSomeScheme(loc.uri, Schemas.walkThroughSnippet, Schemas.vscodeChatCodeBlock, Schemas.vscodeChatCodeCompareBlock)) {
+	if (matchesSomeScheme(loc.uri, Schemas.walkThroughSnippet, Schemas.vscodeChatCodeBlock, Schemas.vscodeChatCodeCompareBlock, Schemas.vscodeCopilotBackingChatCodeBlock)) {
 		return false;
 	}
 

src/vs/platform/markers/common/markerService.ts

@@ -18,6 +18,7 @@ export const unsupportedSchemas = new Set([
 	Schemas.walkThrough,
 	Schemas.walkThroughSnippet,
 	Schemas.vscodeChatCodeBlock,
+	Schemas.vscodeCopilotBackingChatCodeBlock,
 ]);
 
 class DoubleResourceMap<V> {

src/vs/workbench/contrib/chat/browser/chatWidget.ts

@@ -9,8 +9,8 @@ import { disposableTimeout, timeout } from 'vs/base/common/async';
 import { toErrorMessage } from 'vs/base/common/errorMessage';
 import { Emitter, Event } from 'vs/base/common/event';
 import { Disposable, DisposableStore, IDisposable, MutableDisposable, combinedDisposable, toDisposable } from 'vs/base/common/lifecycle';
-import { Schemas } from 'vs/base/common/network';
-import { isEqual } from 'vs/base/common/resources';
+import { matchesScheme, Schemas } from 'vs/base/common/network';
+import { extUri, isEqual } from 'vs/base/common/resources';
 import { isDefined } from 'vs/base/common/types';
 import { URI } from 'vs/base/common/uri';
 import 'vs/css!./media/chat';
@@ -200,11 +200,18 @@ export class ChatWidget extends Disposable implements IChatWidget {
 		this._codeBlockModelCollection = this._register(instantiationService.createInstance(CodeBlockModelCollection));
 
 		this._register(codeEditorService.registerCodeEditorOpenHandler(async (input: ITextResourceEditorInput, _source: ICodeEditor | null, _sideBySide?: boolean): Promise<ICodeEditor | null> => {
-			if (input.resource.scheme !== Schemas.vscodeChatCodeBlock) {
+			let resource = input.resource;
+
+			// if trying to open backing documents, actually open the real chat code block doc
+			if (matchesScheme(resource, Schemas.vscodeCopilotBackingChatCodeBlock)) {
+				resource = resource.with({ scheme: Schemas.vscodeChatCodeBlock });
+			}
+
+			if (resource.scheme !== Schemas.vscodeChatCodeBlock) {
 				return null;
 			}
 
-			const responseId = input.resource.path.split('/').at(1);
+			const responseId = resource.path.split('/').at(1);
 			if (!responseId) {
 				return null;
 			}
@@ -214,12 +221,14 @@ export class ChatWidget extends Disposable implements IChatWidget {
 				return null;
 			}
 
+			// TODO: needs to reveal the chat view
+
 			this.reveal(item);
 
 			await timeout(0); // wait for list to actually render
 
 			for (const editor of this.renderer.editorsInUse() ?? []) {
-				if (editor.uri?.toString() === input.resource.toString()) {
+				if (extUri.isEqual(editor.uri, resource, true)) {
 					const inner = editor.editor;
 					if (input.options?.selection) {
 						inner.setSelection({