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- import { signalLater } from "../util/operation_group.js"
- import { restartBlink } from "../display/selection.js"
- import { isModifierKey, keyName, lookupKey } from "../input/keymap.js"
- import { eventInWidget } from "../measurement/widgets.js"
- import { ie, ie_version, mac, presto, gecko } from "../util/browser.js"
- import { activeElt, addClass, rmClass, root } from "../util/dom.js"
- import { e_preventDefault, off, on, signalDOMEvent } from "../util/event.js"
- import { hasCopyEvent } from "../util/feature_detection.js"
- import { Delayed, Pass } from "../util/misc.js"
- import { commands } from "./commands.js"
- // Run a handler that was bound to a key.
- function doHandleBinding(cm, bound, dropShift) {
- if (typeof bound == "string") {
- bound = commands[bound]
- if (!bound) return false
- }
- // Ensure previous input has been read, so that the handler sees a
- // consistent view of the document
- cm.display.input.ensurePolled()
- let prevShift = cm.display.shift, done = false
- try {
- if (cm.isReadOnly()) cm.state.suppressEdits = true
- if (dropShift) cm.display.shift = false
- done = bound(cm) != Pass
- } finally {
- cm.display.shift = prevShift
- cm.state.suppressEdits = false
- }
- return done
- }
- function lookupKeyForEditor(cm, name, handle) {
- for (let i = 0; i < cm.state.keyMaps.length; i++) {
- let result = lookupKey(name, cm.state.keyMaps[i], handle, cm)
- if (result) return result
- }
- return (cm.options.extraKeys && lookupKey(name, cm.options.extraKeys, handle, cm))
- || lookupKey(name, cm.options.keyMap, handle, cm)
- }
- // Note that, despite the name, this function is also used to check
- // for bound mouse clicks.
- let stopSeq = new Delayed
- export function dispatchKey(cm, name, e, handle) {
- let seq = cm.state.keySeq
- if (seq) {
- if (isModifierKey(name)) return "handled"
- if (/\'$/.test(name))
- cm.state.keySeq = null
- else
- stopSeq.set(50, () => {
- if (cm.state.keySeq == seq) {
- cm.state.keySeq = null
- cm.display.input.reset()
- }
- })
- if (dispatchKeyInner(cm, seq + " " + name, e, handle)) return true
- }
- return dispatchKeyInner(cm, name, e, handle)
- }
- function dispatchKeyInner(cm, name, e, handle) {
- let result = lookupKeyForEditor(cm, name, handle)
- if (result == "multi")
- cm.state.keySeq = name
- if (result == "handled")
- signalLater(cm, "keyHandled", cm, name, e)
- if (result == "handled" || result == "multi") {
- e_preventDefault(e)
- restartBlink(cm)
- }
- return !!result
- }
- // Handle a key from the keydown event.
- function handleKeyBinding(cm, e) {
- let name = keyName(e, true)
- if (!name) return false
- if (e.shiftKey && !cm.state.keySeq) {
- // First try to resolve full name (including 'Shift-'). Failing
- // that, see if there is a cursor-motion command (starting with
- // 'go') bound to the keyname without 'Shift-'.
- return dispatchKey(cm, "Shift-" + name, e, b => doHandleBinding(cm, b, true))
- || dispatchKey(cm, name, e, b => {
- if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion)
- return doHandleBinding(cm, b)
- })
- } else {
- return dispatchKey(cm, name, e, b => doHandleBinding(cm, b))
- }
- }
- // Handle a key from the keypress event
- function handleCharBinding(cm, e, ch) {
- return dispatchKey(cm, "'" + ch + "'", e, b => doHandleBinding(cm, b, true))
- }
- let lastStoppedKey = null
- export function onKeyDown(e) {
- let cm = this
- if (e.target && e.target != cm.display.input.getField()) return
- cm.curOp.focus = activeElt(root(cm))
- if (signalDOMEvent(cm, e)) return
- // IE does strange things with escape.
- if (ie && ie_version < 11 && e.keyCode == 27) e.returnValue = false
- let code = e.keyCode
- cm.display.shift = code == 16 || e.shiftKey
- let handled = handleKeyBinding(cm, e)
- if (presto) {
- lastStoppedKey = handled ? code : null
- // Opera has no cut event... we try to at least catch the key combo
- if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKey))
- cm.replaceSelection("", null, "cut")
- }
- if (gecko && !mac && !handled && code == 46 && e.shiftKey && !e.ctrlKey && document.execCommand)
- document.execCommand("cut")
- // Turn mouse into crosshair when Alt is held on Mac.
- if (code == 18 && !/\bCodeMirror-crosshair\b/.test(cm.display.lineDiv.className))
- showCrossHair(cm)
- }
- function showCrossHair(cm) {
- let lineDiv = cm.display.lineDiv
- addClass(lineDiv, "CodeMirror-crosshair")
- function up(e) {
- if (e.keyCode == 18 || !e.altKey) {
- rmClass(lineDiv, "CodeMirror-crosshair")
- off(document, "keyup", up)
- off(document, "mouseover", up)
- }
- }
- on(document, "keyup", up)
- on(document, "mouseover", up)
- }
- export function onKeyUp(e) {
- if (e.keyCode == 16) this.doc.sel.shift = false
- signalDOMEvent(this, e)
- }
- export function onKeyPress(e) {
- let cm = this
- if (e.target && e.target != cm.display.input.getField()) return
- if (eventInWidget(cm.display, e) || signalDOMEvent(cm, e) || e.ctrlKey && !e.altKey || mac && e.metaKey) return
- let keyCode = e.keyCode, charCode = e.charCode
- if (presto && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return}
- if ((presto && (!e.which || e.which < 10)) && handleKeyBinding(cm, e)) return
- let ch = String.fromCharCode(charCode == null ? keyCode : charCode)
- // Some browsers fire keypress events for backspace
- if (ch == "\x08") return
- if (handleCharBinding(cm, e, ch)) return
- cm.display.input.onKeyPress(e)
- }
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