Extend SnippyEdit to accept selection input and create snippet based it

[roylez]

Problem Statement

I write my snippets myself most of the time, and even though SnippyEdit is handy opening snippet buffer for me, it could be even easier if it could template out new snippets for me.

Certainly I could put similar functionality together myself, but expand_snippet(snippet, word) does not take pre-fills, and I could not enable it to jump between stops.

Ideas or possible solutions

SnippyEdit could expand a snippet to create new snippets, and put the selected text in main content, i.e, $0.

The workflow should like:

• :SnippyEdit entered
• A choice of snippet files is presented, like what it is right now
• Depending on the chosen snippet flavour, expand a built-in snippet and put the text selection as $0. For example

snippet ${1:trigger} "${2:descritption}"
  ${0:SELECTED TEXT}

Alternatives you have considered

Maybe it could have its own command, but having the function in SnippyEdit would be better.

[dcampos]

This would certainly be handy on many occasions. Implementation-wise, SnippyEdit could take an optional range to determine the text to used for creating the snippet.

For the built-in snippet, we could either hard-code it or store it in a snippets/ folder within the plugin tree. The latter approach would make it easier for user to override.