| Current File : //proc/self/root/usr/share/nodejs/codemirror/src/modes.js |
import { copyObj, createObj } from "./util/misc.js"
// 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
}
// This can be used to attach properties to mode objects from
// outside the actual mode definition.
export let modeExtensions = {}
export function extendMode(mode, properties) {
let exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {})
copyObj(properties, exts)
}
export function copyState(mode, state) {
if (state === true) return state
if (mode.copyState) return mode.copyState(state)
let nstate = {}
for (let n in state) {
let val = state[n]
if (val instanceof Array) val = val.concat([])
nstate[n] = val
}
return nstate
}
// Given a mode and a state (for that mode), find the inner mode and
// state at the position that the state refers to.
export function innerMode(mode, state) {
let info
while (mode.innerMode) {
info = mode.innerMode(state)
if (!info || info.mode == mode) break
state = info.state
mode = info.mode
}
return info || {mode: mode, state: state}
}
export function startState(mode, a1, a2) {
return mode.startState ? mode.startState(a1, a2) : true
}