import { getMode } from "../modes"

import { startWorker } from "./highlight_worker"
import { regChange } from "./view_tracking"

// Used to get the editor into a consistent state again when options change.

export function loadMode(cm) {
  cm.doc.mode = getMode(cm.options, cm.doc.modeOption)
  resetModeState(cm)
}

export function resetModeState(cm) {
  cm.doc.iter(line => {
    if (line.stateAfter) line.stateAfter = null
    if (line.styles) line.styles = null
  })
  cm.doc.frontier = cm.doc.first
  startWorker(cm, 100)
  cm.state.modeGen++
  if (cm.curOp) regChange(cm)
}