A new markup editor helper

Markup types

Block
- Markup before and optionally after block
- Block may contain several rows
- Block may also be a list item och table item
- Block may also be open i.e. start identifier has been entered but not end marker
List
- In list each row have a block operation
- Block operations may be different on each line

Attributes

Markups may have different attributes associated with the markup
The same markups may be used on different markup types

Selection types

Selection
- Only text covered by selection is modified
Cursor Location / No selection
- All markup types around cursor location is identified and included in scope selection

Open issues

Should nested markups be supported

Interaction flow

Show current markups

Check which markup which are active (active_markup) at cursor_pos/selection`
If a single markup
- Identify attributes for markup
- Highlight attributes
Highlight active_markup

Change markup for selection

If selection has been made
- If selection markup has no markup
  - Set wanted markup
- If selection markup != wanted markup
  - Change selection markup to wanted markup
- If selection markup == wanted markup
  - Remove current markup

Enter markup

If no selection has been made
- If active markups != wanted markup
  - Output beginning markup
  - Set open markup (open_markup) to wanted markup
- If active markups == wanted markup
  - Make selection for active markup
  - Remove current markup

Exit markup

If open_markup and it is of block type
- Output end markup
- Clear open_markup

Carrage return in open block markup

If open_markup and carrage return
- Output end markup for row
- Output begin markup for next row (at the same location as last row)

Change attribute

If selection has been made
- If selection has markup markup
  - Change markup attribute to wanted attribute
If active markup
- Change markup attribute to wanted attribute

References

TEH
MarkItUp
Different desktop editors