SynCompletionProposal functionality

[Dimon-II]

Situation: autocomplete items can be parenthesized and Cyrillic.

There are three problems with the standard component:

1. Capturing text in the editor for replacement/completion: grabs the word/identifier, but my macros can be with brackets and quotes.
2. Filter the dropdown list based on text containing break letters: for example, typing "(" closes the dropdown list instantly.
3. Text substitution in the editor: the word/identifier is replaced, not the fragment with brackets "(а)" -> "(auto)" -> "((auto)) "

Can this be fixed with standard component options or minimal effort?

I couldn't do it all in a standard component, but implement it using a simple combo box.
The mechanism for capturing text is made from the reverse: the text row is checked character by character to the left from the cursor position - in the macros list, the same beginning is searched. Then - to the right of the cursor position, while there is a match list items.
The text in the dropdowns input field is used only for the filter, it can be modified, the cursor position is also used for the filtering.