Resize & fit causing input display incorrectly

[ZodiacWind]

I used xterm-addon-fit to resize the terminal while the window size changing.

The terminal can resize normally. However, if there are multiple lines input, the current input cannot dispplay correctly:

• If the window becomes larger, many spaces will be added to the tails input instead of filling with following lines.
• If the window shrinks, the current input will be truncated and could not be recovered.

In addition, historical input can be displayed correctly.

Details

• Browser and browser version: Google Chrome 103.0.5060.134（
• OS version: Windows 11 10.0.25163
• xterm.js version: 4.20 beta 26

Steps to reproduce

1. Please refer to the code: https://codesandbox.io/s/xtermreact-demo-forked-o5n04u to reproduce it.

[Tyriar]

The resize behavior on Windows is a little special. First there is this option which should be used when using a Windows pty:

xterm.js/typings/xterm.d.ts

Lines 210 to 220 in a8f63c4

	/**
	* Whether "Windows mode" is enabled. Because Windows backends winpty and
	* conpty operate by doing line wrapping on their side, xterm.js does not
	* have access to wrapped lines. When Windows mode is enabled the following
	* changes will be in effect:
	*
	* - Reflow is disabled.
	* - Lines are assumed to be wrapped if the last character of the line is
	* not whitespace.
	*/
	windowsMode?: boolean;

This actually disables reflow completely as conpty handles resize instead of the terminal. This is fixed for the most part on recent versions of Windows 11 because of: microsoft/terminal#405

This is how VS Code behaves on Windows 11 21H2 (v22000.795):

VS Code only enables windowsMode on Windows < v21376:

https://github.com/microsoft/vscode/blob/e62392c1b91d9e56c2af6257a8f32bd6d0fdf295/src/vs/platform/terminal/node/terminalProcess.ts#L397

I'll add a comment to windowsMode about the recommended version.

[ZodiacWind]

Thanks for your reply.