Forgot to mention that I also documented parts of the StatusView code using EmmyLua which can serve as an experiment of how one would document the core code directly.

Restructured almost everything that I did before, borrowed some ideas from vsc statusbar api and Implemented some more features as described on latest commit, for convenience will also paste them here:

• Items are now objects that can be retrieved and manipulated.
• clip rect is used for left and right panes
• initial support for items to do their own custom drawing (this was takase idea) by also doing a clip rect for them
• a custom background color can be specified for the item.
• a command or function can be executed on item click.
• Introduced functionality to easily hide or show all or specific items.
• Better handling of deprecated get_items()
• Spacing is automatically added to items and cleaned on deprecated items.
• Default items where separated and given the names: doc:file, doc:position, doc:indentation, doc:lines, doc:line-ending, core.commandview.
• Some default right or left click actions where given to the default items.
• Started adding required bits to support dragging to left and right panes when some items aren't visible.

Note: should work well enough already but maybe some repetitive stuff can be cleaned out.

Also here a screen capture showing some of the things that can be done now:

Dragging and scrolling left or right panels is now supported, now last missing bit is detecting the visible area of an item for click and mouse hover events:

For reference, leaving some sample code on how to do custom drawing into the status bar:

if not core.status_view:get_item("my:custom-item") then
  local item = core.status_view:add_item(nil, "my:custom-item", StatusView.Item.LEFT)
  item.on_draw = function(x, y, h, calc_only)
    --true when the status bar needs to know the width of drawing area
    if calc_only then
      return 100
    end
    --if calc_only not true is time to draw
    renderer.draw_text(style.font, "Hello", x, y, style.text)
  end
  item.background_color = { common.color "#0f6773" }
  item.tooltip = "my item"
end

What do you think about having an hovered background color for items with on_click commands? If so, an Item.background_color_hovered would be needed. Also the hovered status should be passed to on_draw.

Implemented:

This isn't too important, but resizing doesn't gracefully update the scrolled position:

Fixed (sorry for flickering on preview seems my mesa opengl driver has wayland issues with sdl when doing that):