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