From 6f148ab5f93da761b69fe6e8ed27f4794a6781ad Mon Sep 17 00:00:00 2001
From: Daniel Imms <2193314+Tyriar@users.noreply.github.com>
Date: Wed, 14 Jul 2021 14:44:35 -0700
Subject: [PATCH] Resize terminal when it's shown

This fixes the following case:

1. Create and split the terminal
2. Hide the panel
3. Create a terminal in the background
4. Show it, the dimensions were wrong
---
 .../workbench/contrib/terminal/browser/terminalInstance.ts   | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/vs/workbench/contrib/terminal/browser/terminalInstance.ts b/src/vs/workbench/contrib/terminal/browser/terminalInstance.ts
index 396b0feeca39b..c44705b3e76ef 100644
--- a/src/vs/workbench/contrib/terminal/browser/terminalInstance.ts
+++ b/src/vs/workbench/contrib/terminal/browser/terminalInstance.ts
@@ -1072,6 +1072,11 @@ export class TerminalInstance extends Disposable implements ITerminalInstance {
 			this._wrapperElement.classList.toggle('active', visible);
 		}
 		if (visible && this._xterm && this._xtermCore) {
+			// Resize to re-evaluate dimensions, this will ensure when switching to a terminal it is
+			// using the most up to date dimensions (eg. when terminal is created in the background
+			// using cached dimensions of a split terminal).
+			this._resize();
+
 			// Trigger a manual scroll event which will sync the viewport and scroll bar. This is
 			// necessary if the number of rows in the terminal has decreased while it was in the
 			// background since scrollTop changes take no effect but the terminal's position does