General.Web/wwwroot/lib/codemirror-5.31.0/src/modes.js

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import { copyObj, createObj } from "./util/misc"

// Known modes, by name and by MIME
export let modes = {}, mimeModes = {}

// Extra arguments are stored as the mode's dependencies, which is
// used by (legacy) mechanisms like loadmode.js to automatically
// load a mode. (Preferred mechanism is the require/define calls.)
export function defineMode(name, mode) {
  if (arguments.length > 2)
    mode.dependencies = Array.prototype.slice.call(arguments, 2)
  modes[name] = mode
}

export function defineMIME(mime, spec) {
  mimeModes[mime] = spec
}

// Given a MIME type, a {name, ...options} config object, or a name
// string, return a mode config object.
export function resolveMode(spec) {
  if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) {
    spec = mimeModes[spec]
  } else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty(spec.name)) {
    let found = mimeModes[spec.name]
    if (typeof found == "string") found = {name: found}
    spec = createObj(found, spec)
    spec.name = found.name
  } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec)) {
    return resolveMode("application/xml")
  } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+json$/.test(spec)) {
    return resolveMode("application/json")
  }
  if (typeof spec == "string") return {name: spec}
  else return spec || {name: "null"}
}

// Given a mode spec (anything that resolveMode accepts), find and
// initialize an actual mode object.
export function getMode(options, spec) {
  spec = resolveMode(spec)
  let mfactory = modes[spec.name]
  if (!mfactory) return getMode(options, "text/plain")
  let modeObj = mfactory(options, spec)
  if (modeExtensions.hasOwnProperty(spec.name)) {
    let exts = modeExtensions[spec.name]
    for (let prop in exts) {
      if (!exts.hasOwnProperty(prop)) continue
      if (modeObj.hasOwnProperty(prop)) modeObj["_" + prop] = modeObj[prop]
      modeObj[prop] = exts[prop]
    }
  }
  modeObj.name = spec.name
  if (spec.helperType) modeObj.helperType = spec.helperType
  if (spec.modeProps) for (let prop in spec.modeProps)
    modeObj[prop] = spec.modeProps[prop]

  return modeObj
}