valw/noctalia-plugin/shortcut.luau

--!nonstrict
-- valw control-center tile. Click: the control center closes, then a
-- region shot (so it isn't in it). Right click: the toolbar panel.

local PANEL = "elars/valw:toolbar"

-- valw's stderr on an error starts with "error: <message>", then cause,
-- hint and log lines.
local function errorMessage(lines)
  for _, line in ipairs(lines) do
    local message = string.match(line, "^error: (.+)$")
    if message then
      return message
    end
  end
  return noctalia.tr("error.failed")
end

-- A capture lasts as long as the user takes (a region, a zoom, the timer),
-- so it runs as a stream: runAsync with a callback kills its command after
-- 5 s. stderr joins the stream and the exit status comes last.
local function capture(command)
  local lines = {}
  local started = noctalia.runStream("(" .. command .. ") 2>&1; echo valw-exit:$?", function(line)
    local code = string.match(line, "^valw%-exit:(%d+)$")
    if code == nil then
      table.insert(lines, line)
    elseif code ~= "0" and code ~= "3" then
      noctalia.notifyError("valw", errorMessage(lines))
    end
  end)
  if not started then
    noctalia.notifyError("valw", noctalia.tr("error.failed"))
  end
end

shortcut.setLabel(noctalia.tr("tile.label"))
shortcut.setIcon("camera", "camera")

function onClick()
  capture("noctalia msg panel-close >/dev/null 2>&1; sleep 0.3 && valw region")
end

function onRightClick()
  noctalia.togglePanel(PANEL)
end