Add padding when pressing space between a pair of curly braces

When I type `{` to create a pair of curly braces: ``` {} ``` ...and then when I press space, I would like 2 spaces to be inserted with the cursor in the middle: ``` { | } ^ cursor ``` Currently it just inserts a single space, so getting the same result requires pressing space twice then the back arrow once. Or otherwise setting: ``` "javascript.format.insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets": true // or "typescript.format.insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets": true ``` ...then formatting the line once there's already stuff inside it. I believe pressing space between a pair of brackets with nothing between them (`{}`) is more-or-less an unambiguous signal (in pretty much any language) that the user intends to have a padding space at both ends. It's also very similar to the already-covered case where someone instead presses enter to produce: ``` { | <- cursor } ``` In Sublime Text I was able to add the functionality myself using a keybinding that looked (in their format) like: ``` { "keys": ["space"], "command": "insert_snippet", "args": {"contents": " $0 "}, "context": [ { "key": "selection_empty", "operator": "equal", "operand": true, "match_all": true }, { "key": "preceding_text", "operator": "regex_contains", "operand": "\\{$", "match_all": true }, { "key": "following_text", "operator": "regex_contains", "operand": "^\\}", "match_all": true } ] } ``` ...but in VS Code there doesn't seem to be enough functionality available to add a keybinding like this - I can insert a snippet but can't see anything that would allow me to limit the context to the inside of a pair of brackets. If someone points me to the place in the codebase where the similar behavior for pressing "enter" is defined, I might be able to open a PR myself.