Define the editor api workflow needed to implement teletype plugin

[sunix]

Subtask of #9434

[evidolob]

@sunix Can you provide list of methods that you are use for teletype plugin?

[ashumilova]

Almost all work is done on Editor API already.

[sunix]

here it is

• get opened editors

• get opened editor

• put/remove markers (cursor) - position row/column

• on cursor/selection activity

  • selection start.row
  • selection start.col
  • selection end.row
  • selection end.col

• on document ready

• on document opened

• on document active

• on document changing (about to change)

  • startPosition.getrow
  • startPosition.getColumn
  • endPosition.getrow
  • endPosition.getcolumn
  • newText

• document getContents

• document replace(oldstartrow, oldstartcolumn, oldendrow, oldendcolumn, text)

• document setCursorPosition

• document setContents (could be using replace as well)

• open a document

Nice to have but optional

• custumize user markers (css, add text, image)

[sunix]

Also would be nice to have the ability to open an editor that is not in the file system. have a virtual file system but maybe this is out of scope.

[che-bot]

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