Wrong autocomplete for Components nested in objects

[pushkine]

Expected autocomplete to show properties, got every global variable instead

edit: actions nested in objects have the same issue (use:object.action)

[jasonlyu123]

This is the same cause of #538. But because the tag is not closed. One workaround is to self close it first like this.

<Slot />

or

<Slot. />

And then trigger completion

[dummdidumm]

Possible solution: Try to parse it with svelte2tsx. If that fails, get the position where the autocompletion should happen and backtrack up until specific delimiters like whitespace, { or <, take everything inbetween and append it to the fallback-document.
So this:

<script>
   import { Hi } from './hi'
   let foo = 'bar';
</script>
<Hi.

becomes

import { Hi } from './hi'
let foo = 'bar';
Hi.

(the Hi. part is new)

This could also solve other cases where intellisense is not working properly currently.