Check if new SCM integration is enabled (fixes #18857 and #19337)

src/vs/workbench/parts/walkThrough/electron-browser/editor/vs_code_editor_walkthrough.md

@@ -157,7 +157,7 @@ ul>li.item$*5
 ## Thanks!
 Well if you have got this far then you will have touched on some of the editing features in Visual Studio Code.  But don't stop now :)  We have lots of additional [documentation](https://code.visualstudio.com/docs) and [introductory videos](https://code.visualstudio.com/docs/introvideos/overview) for the product that will help you learn how to use it.  And while you are here, here are a few additional things you can try:
 - Open the Integrated Terminal by pressing kb(workbench.action.terminal.toggleTerminal) then see what's possible by [reviewing the terminal documentation](https://code.visualstudio.com/docs/editor/integrated-terminal)
-- Work with version control by pressing kb(workbench.view.git) understand how to stage, commit, change branches, and view diffs and more by reviewing the [version control documentation](https://code.visualstudio.com/docs/editor/versioncontrol)
+- Work with version control by pressing <span class="git-only">kb(workbench.view.git)</span><span class="scm-only">kb(workbench.view.scm)</span> understand how to stage, commit, change branches, and view diffs and more by reviewing the [version control documentation](https://code.visualstudio.com/docs/editor/versioncontrol)
 - Browse thousands of extensions in our integrated gallery by pressing with kb(workbench.view.extensions) the [documentation](https://code.visualstudio.com/docs/editor/extension-gallery) will show you how to see the most popular extensions, disable installed ones and more.
 
 OK that's all for now,

src/vs/workbench/parts/walkThrough/electron-browser/walkThroughPart.css

@@ -159,6 +159,16 @@
 	display: initial;
 }
 
+.monaco-workbench > .part.editor > .content .walkThroughContent .scm-only {
+	display: none;
+}
+.monaco-workbench > .part.editor > .content .walkThroughContent.scmEnabled .scm-only {
+	display: initial;
+}
+.monaco-workbench > .part.editor > .content .walkThroughContent.scmEnabled .git-only {
+	display: none;
+}
+
 .vs .monaco-workbench > .part.editor > .content .walkThroughContent .monaco-editor-background,
 .vs .monaco-workbench > .part.editor > .content .walkThroughContent .glyph-margin {
 	background-color: #eee;

src/vs/workbench/parts/walkThrough/electron-browser/walkThroughPart.ts

@@ -34,6 +34,7 @@ import { Scope } from 'vs/workbench/common/memento';
 import { RawContextKey, IContextKey, IContextKeyService } from 'vs/platform/contextkey/common/contextkey';
 import { IConfigurationService } from 'vs/platform/configuration/common/configuration';
 import { once } from 'vs/base/common/event';
+import SCMPreview from 'vs/workbench/parts/scm/browser/scmPreview';
 
 export const WALK_THROUGH_FOCUS = new RawContextKey<boolean>('interactivePlaygroundFocus', false);
 
@@ -247,6 +248,7 @@ export class WalkThroughPart extends BaseEditor {
 				if (strings.endsWith(input.getResource().path, '.html')) {
 					this.content.innerHTML = content;
 					this.updateSizeClasses();
+					this.updateMarkerClasses();
 					this.decorateContent();
 					if (input.onReady) {
 						input.onReady(this.content.firstElementChild as HTMLElement);
@@ -324,6 +326,7 @@ export class WalkThroughPart extends BaseEditor {
 					}));
 				});
 				this.updateSizeClasses();
+				this.updateMarkerClasses();
 				if (input.onReady) {
 					input.onReady(innerContent);
 				}
@@ -332,6 +335,13 @@ export class WalkThroughPart extends BaseEditor {
 			});
 	}
 
+	private updateMarkerClasses() {
+		const innerContent = this.content.firstElementChild;
+		if (SCMPreview.enabled && innerContent) {
+			innerContent.classList.add('scmEnabled');
+		}
+	}
+
 	private style(div: HTMLElement) {
 		const styleElement = document.querySelector('.monaco-editor-background');
 		const {color, backgroundColor, fontFamily, fontWeight, fontSize} = window.getComputedStyle(styleElement);

src/vs/workbench/parts/welcomePage/electron-browser/vs_code_welcome_page.html

@@ -11,7 +11,7 @@
 					<ul>
 						<li class="mac-only"><a href="command:workbench.action.files.openFileFolder">Open folder...</a></li>
 						<li class="windows-only linux-only"><a href="command:workbench.action.files.openFolder">Open folder...</a></li>
-						<li><a href="command:workbench.action.git.clone">Clone Git repository...</a></li>
+						<li class="git-only"><a href="command:workbench.action.git.clone">Clone Git repository...</a></li>
 					</ul>
 				</div>
 				<div class="section recent">

src/vs/workbench/parts/welcomePage/electron-browser/welcomePage.css

@@ -276,4 +276,14 @@
 }
 .monaco-workbench.linux > .part.editor > .content .welcomePage .linux-only {
 	display: initial;
+}
+
+.monaco-workbench > .part.editor > .content .welcomePageContainer .scm-only {
+	display: none;
+}
+.monaco-workbench > .part.editor > .content .welcomePageContainer.scmEnabled .scm-only {
+	display: initial;
+}
+.monaco-workbench > .part.editor > .content .welcomePageContainer.scmEnabled .git-only {
+	display: none;
 }
\ No newline at end of file