boxedit

This extension can be used for editing ASCII art or text based field map of RPG-like game.

Usage example

Open text file by default text editor.
Click upper-left corner. Then, hold Alt+Shift and click bottom-right corner. (This is the standard vscode feature to select box-shaped text)
Press Alt+C to make boxedit select the text. (background color become purple)
Hold Alt and click any where to move the selected text.
Or press Alt+Up, Alt+Down, Alt+Left, Alt+Right to move it.
Press alt+Enter to paste the selected text.

boxedit-mapedit

If you do the same by normal vscode, you may feel difficult to keep the box shaped structure of text because vscode always insert the pasted text.

Suppose as if the purple text is a floating sheet. You can move it around with out changing the underlining text.
You can flip the purple text horizontally or vertically.
CJK (Chinese/Japanese/Korean) character is treated appropriately so that each of these character occupies 2 ascii characters width.

Licensed under the MIT License.

Screen shot added.

Alpha version.