Mercurial
diff .cms/lib/codemirror/src/edit/key_events.js @ 0:78edf6b517a0 draft
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author | Coffee CMS <info@coffee-cms.ru> |
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date | Fri, 11 Oct 2024 22:40:23 +0000 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/.cms/lib/codemirror/src/edit/key_events.js Fri Oct 11 22:40:23 2024 +0000 @@ -0,0 +1,163 @@ +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) +}