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import { Display } from "../display/Display.js"
import { onFocus, onBlur } from "../display/focus.js"
import { maybeUpdateLineNumberWidth } from "../display/line_numbers.js"
import { endOperation, operation, startOperation } from "../display/operations.js"
import { initScrollbars } from "../display/scrollbars.js"
import { onScrollWheel } from "../display/scroll_events.js"
import { setScrollLeft, updateScrollTop } from "../display/scrolling.js"
import { clipPos, Pos } from "../line/pos.js"
import { posFromMouse } from "../measurement/position_measurement.js"
import { eventInWidget } from "../measurement/widgets.js"
import Doc from "../model/Doc.js"
import { attachDoc } from "../model/document_data.js"
import { Range } from "../model/selection.js"
import { extendSelection } from "../model/selection_updates.js"
import { ie, ie_version, mobile, webkit } from "../util/browser.js"
import { e_preventDefault, e_stop, on, signal, signalDOMEvent } from "../util/event.js"
import { copyObj, Delayed } from "../util/misc.js"
import { clearDragCursor, onDragOver, onDragStart, onDrop } from "./drop_events.js"
import { ensureGlobalHandlers } from "./global_events.js"
import { onKeyDown, onKeyPress, onKeyUp } from "./key_events.js"
import { clickInGutter, onContextMenu, onMouseDown } from "./mouse_events.js"
import { themeChanged } from "./utils.js"
import { defaults, optionHandlers, Init } from "./options.js"
// A CodeMirror instance represents an editor. This is the object
// that user code is usually dealing with.
export function CodeMirror(place, options) {
if (!(this instanceof CodeMirror)) return new CodeMirror(place, options)
this.options = options = options ? copyObj(options) : {}
// Determine effective options based on given values and defaults.
copyObj(defaults, options, false)
let doc = options.value
if (typeof doc == "string") doc = new Doc(doc, options.mode, null, options.lineSeparator, options.direction)
else if (options.mode) doc.modeOption = options.mode
this.doc = doc
let input = new CodeMirror.inputStyles[options.inputStyle](this)
let display = this.display = new Display(place, doc, input, options)
display.wrapper.CodeMirror = this
themeChanged(this)
if (options.lineWrapping)
this.display.wrapper.className += " CodeMirror-wrap"
initScrollbars(this)
this.state = {
keyMaps: [], // stores maps added by addKeyMap
overlays: [], // highlighting overlays, as added by addOverlay
modeGen: 0, // bumped when mode/overlay changes, used to invalidate highlighting info
overwrite: false,
delayingBlurEvent: false,
focused: false,
suppressEdits: false, // used to disable editing during key handlers when in readOnly mode
pasteIncoming: -1, cutIncoming: -1, // help recognize paste/cut edits in input.poll
selectingText: false,
draggingText: false,
highlight: new Delayed(), // stores highlight worker timeout
keySeq: null, // Unfinished key sequence
specialChars: null
}
if (options.autofocus && !mobile) display.input.focus()
// Override magic textarea content restore that IE sometimes does
// on our hidden textarea on reload
if (ie && ie_version < 11) setTimeout(() => this.display.input.reset(true), 20)
registerEventHandlers(this)
ensureGlobalHandlers()
startOperation(this)
this.curOp.forceUpdate = true
attachDoc(this, doc)
if ((options.autofocus && !mobile) || this.hasFocus())
setTimeout(() => {
if (this.hasFocus() && !this.state.focused) onFocus(this)
}, 20)
else
onBlur(this)
for (let opt in optionHandlers) if (optionHandlers.hasOwnProperty(opt))
optionHandlers[opt](this, options[opt], Init)
maybeUpdateLineNumberWidth(this)
if (options.finishInit) options.finishInit(this)
for (let i = 0; i < initHooks.length; ++i) initHooks[i](this)
endOperation(this)
// Suppress optimizelegibility in Webkit, since it breaks text
// measuring on line wrapping boundaries.
if (webkit && options.lineWrapping &&
getComputedStyle(display.lineDiv).textRendering == "optimizelegibility")
display.lineDiv.style.textRendering = "auto"
}
// The default configuration options.
CodeMirror.defaults = defaults
// Functions to run when options are changed.
CodeMirror.optionHandlers = optionHandlers
export default CodeMirror
// Attach the necessary event handlers when initializing the editor
function registerEventHandlers(cm) {
let d = cm.display
on(d.scroller, "mousedown", operation(cm, onMouseDown))
// Older IE's will not fire a second mousedown for a double click
if (ie && ie_version < 11)
on(d.scroller, "dblclick", operation(cm, e => {
if (signalDOMEvent(cm, e)) return
let pos = posFromMouse(cm, e)
if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) return
e_preventDefault(e)
let word = cm.findWordAt(pos)
extendSelection(cm.doc, word.anchor, word.head)
}))
else
on(d.scroller, "dblclick", e => signalDOMEvent(cm, e) || e_preventDefault(e))
// Some browsers fire contextmenu *after* opening the menu, at
// which point we can't mess with it anymore. Context menu is
// handled in onMouseDown for these browsers.
on(d.scroller, "contextmenu", e => onContextMenu(cm, e))
on(d.input.getField(), "contextmenu", e => {
if (!d.scroller.contains(e.target)) onContextMenu(cm, e)
})
// Used to suppress mouse event handling when a touch happens
let touchFinished, prevTouch = {end: 0}
function finishTouch() {
if (d.activeTouch) {
touchFinished = setTimeout(() => d.activeTouch = null, 1000)
prevTouch = d.activeTouch
prevTouch.end = +new Date
}
}
function isMouseLikeTouchEvent(e) {
if (e.touches.length != 1) return false
let touch = e.touches[0]
return touch.radiusX <= 1 && touch.radiusY <= 1
}
function farAway(touch, other) {
if (other.left == null) return true
let dx = other.left - touch.left, dy = other.top - touch.top
return dx * dx + dy * dy > 20 * 20
}
on(d.scroller, "touchstart", e => {
if (!signalDOMEvent(cm, e) && !isMouseLikeTouchEvent(e) && !clickInGutter(cm, e)) {
d.input.ensurePolled()
clearTimeout(touchFinished)
let now = +new Date
d.activeTouch = {start: now, moved: false,
prev: now - prevTouch.end <= 300 ? prevTouch : null}
if (e.touches.length == 1) {
d.activeTouch.left = e.touches[0].pageX
d.activeTouch.top = e.touches[0].pageY
}
}
})
on(d.scroller, "touchmove", () => {
if (d.activeTouch) d.activeTouch.moved = true
})
on(d.scroller, "touchend", e => {
let touch = d.activeTouch
if (touch && !eventInWidget(d, e) && touch.left != null &&
!touch.moved && new Date - touch.start < 300) {
let pos = cm.coordsChar(d.activeTouch, "page"), range
if (!touch.prev || farAway(touch, touch.prev)) // Single tap
range = new Range(pos, pos)
else if (!touch.prev.prev || farAway(touch, touch.prev.prev)) // Double tap
range = cm.findWordAt(pos)
else // Triple tap
range = new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0)))
cm.setSelection(range.anchor, range.head)
cm.focus()
e_preventDefault(e)
}
finishTouch()
})
on(d.scroller, "touchcancel", finishTouch)
// Sync scrolling between fake scrollbars and real scrollable
// area, ensure viewport is updated when scrolling.
on(d.scroller, "scroll", () => {
if (d.scroller.clientHeight) {
updateScrollTop(cm, d.scroller.scrollTop)
setScrollLeft(cm, d.scroller.scrollLeft, true)
signal(cm, "scroll", cm)
}
})
// Listen to wheel events in order to try and update the viewport on time.
on(d.scroller, "mousewheel", e => onScrollWheel(cm, e))
on(d.scroller, "DOMMouseScroll", e => onScrollWheel(cm, e))
// Prevent wrapper from ever scrolling
on(d.wrapper, "scroll", () => d.wrapper.scrollTop = d.wrapper.scrollLeft = 0)
d.dragFunctions = {
enter: e => {if (!signalDOMEvent(cm, e)) e_stop(e)},
over: e => {if (!signalDOMEvent(cm, e)) { onDragOver(cm, e); e_stop(e) }},
start: e => onDragStart(cm, e),
drop: operation(cm, onDrop),
leave: e => {if (!signalDOMEvent(cm, e)) { clearDragCursor(cm) }}
}
let inp = d.input.getField()
on(inp, "keyup", e => onKeyUp.call(cm, e))
on(inp, "keydown", operation(cm, onKeyDown))
on(inp, "keypress", operation(cm, onKeyPress))
on(inp, "focus", e => onFocus(cm, e))
on(inp, "blur", e => onBlur(cm, e))
}
let initHooks = []
CodeMirror.defineInitHook = f => initHooks.push(f)