Consecutive commands (or "double tap" buttons)

[eugenesvk]

It would be great to able to take consecutive command calls into account to allow for a much faster iterative movements around the text

For example, instead of mapping goto_line_start and goto_line_end to two different buttons (let's say, to h and n) you could make h a "double tap" that would execute a special ["goto_line_start"; "goto_line_end"] command sequence like so:

• goto_line_start on the 1st call
• goto_line_end on 2nd consecutive call (if you press anything else after the 1st call it resets)

Alternatively, you could make a chain of commands that would go beyond the start of the first line:

• goto_line_start on the 1st call
• go to a start of the current block/paragraph on the 2nd consecutive call (currently not implemented)
• go to a start of the previous block/paragraph on the 3rd consecutive call (currently not implemented)
• etc.

Or a ["toggle_comments_line"; "toggle_comments_block"] command could

• comment out a line on 1st call (just like toggle_comments)
• comment out a block (e.g., the whole function) on 2nd consecutive call (not implemented)

Or with the new command extend_to_first_nonwhitespace a double tap command could:

• extend_to_first_nonwhitespace on 1st call
• extend_to_line_start on 2nd all

Now, some of the more advanced commands would as far as I understand have to defined as be part of a plugin, but maybe the consecutive bit could be an adjustment to existing command chaining functionality?