From fab2803943dd7999a676857f57345ca188caa20a Mon Sep 17 00:00:00 2001
From: isidor <inikolic@microsoft.com>
Date: Wed, 21 Aug 2019 17:13:33 +0200
Subject: [PATCH] list expose scrollLeft

---
 src/vs/base/browser/ui/list/listView.ts      | 16 ++++++++++++++++
 src/vs/base/browser/ui/list/listWidget.ts    |  8 ++++++++
 src/vs/base/browser/ui/tree/abstractTree.ts  |  8 ++++++++
 src/vs/base/browser/ui/tree/asyncDataTree.ts |  8 ++++++++
 4 files changed, 40 insertions(+)

diff --git a/src/vs/base/browser/ui/list/listView.ts b/src/vs/base/browser/ui/list/listView.ts
index 4f5394f773d..8ae8867bf64 100644
--- a/src/vs/base/browser/ui/list/listView.ts
+++ b/src/vs/base/browser/ui/list/listView.ts
@@ -683,6 +683,22 @@ export class ListView<T> implements ISpliceable<T>, IDisposable {
 		this.scrollableElement.setScrollPosition({ scrollTop });
 	}
 
+	getScrollLeft(): number {
+		const scrollPosition = this.scrollableElement.getScrollPosition();
+		return scrollPosition.scrollLeft;
+	}
+
+	setScrollLeftt(scrollLeft: number): void {
+		if (this.scrollableElementUpdateDisposable) {
+			this.scrollableElementUpdateDisposable.dispose();
+			this.scrollableElementUpdateDisposable = null;
+			this.scrollableElement.setScrollDimensions({ scrollWidth: this.scrollWidth });
+		}
+
+		this.scrollableElement.setScrollPosition({ scrollLeft });
+	}
+
+
 	get scrollTop(): number {
 		return this.getScrollTop();
 	}
diff --git a/src/vs/base/browser/ui/list/listWidget.ts b/src/vs/base/browser/ui/list/listWidget.ts
index 6e82c6de867..15b21e3b9b0 100644
--- a/src/vs/base/browser/ui/list/listWidget.ts
+++ b/src/vs/base/browser/ui/list/listWidget.ts
@@ -1307,6 +1307,14 @@ export class List<T> implements ISpliceable<T>, IDisposable {
 		this.view.setScrollTop(scrollTop);
 	}
 
+	get scrollLeft(): number {
+		return this.view.getScrollLeft();
+	}
+
+	set scrollLeft(scrollLeft: number) {
+		this.view.setScrollLeftt(scrollLeft);
+	}
+
 	get scrollHeight(): number {
 		return this.view.scrollHeight;
 	}
diff --git a/src/vs/base/browser/ui/tree/abstractTree.ts b/src/vs/base/browser/ui/tree/abstractTree.ts
index 7402d493a98..1aa9c5363e2 100644
--- a/src/vs/base/browser/ui/tree/abstractTree.ts
+++ b/src/vs/base/browser/ui/tree/abstractTree.ts
@@ -1319,6 +1319,14 @@ export abstract class AbstractTree<T, TFilterData, TRef> implements IDisposable
 		this.view.scrollTop = scrollTop;
 	}
 
+	get scrollLeft(): number {
+		return this.view.scrollTop;
+	}
+
+	set scrollLeft(scrollLeft: number) {
+		this.view.scrollLeft = scrollLeft;
+	}
+
 	get scrollHeight(): number {
 		return this.view.scrollHeight;
 	}
diff --git a/src/vs/base/browser/ui/tree/asyncDataTree.ts b/src/vs/base/browser/ui/tree/asyncDataTree.ts
index b26b80d2c49..9c6bea61a41 100644
--- a/src/vs/base/browser/ui/tree/asyncDataTree.ts
+++ b/src/vs/base/browser/ui/tree/asyncDataTree.ts
@@ -400,6 +400,14 @@ export class AsyncDataTree<TInput, T, TFilterData = void> implements IDisposable
 		this.tree.scrollTop = scrollTop;
 	}
 
+	get scrollLeft(): number {
+		return this.tree.scrollLeft;
+	}
+
+	set scrollLeft(scrollLeft: number) {
+		this.tree.scrollLeft = scrollLeft;
+	}
+
 	get scrollHeight(): number {
 		return this.tree.scrollHeight;
 	}
-- 
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