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File: editor/codemirror/src/util/event.js

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  Classes of Cedric Maenetja   Custom PHP HTML Parser   editor/codemirror/src/util/event.js   Download  
File: editor/codemirror/src/util/event.js
Role: Auxiliary data
Content type: text/plain
Description: Auxiliary data
Class: Custom PHP HTML Parser
Process HTML to replace it with parameter values
Author: By
Last change:
Date: 1 year ago
Size: 3,262 bytes
 

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import { mac } from "./browser.js" import { indexOf } from "./misc.js" // EVENT HANDLING // Lightweight event framework. on/off also work on DOM nodes, // registering native DOM handlers. const noHandlers = [] export let on = function(emitter, type, f) { if (emitter.addEventListener) { emitter.addEventListener(type, f, false) } else if (emitter.attachEvent) { emitter.attachEvent("on" + type, f) } else { let map = emitter._handlers || (emitter._handlers = {}) map[type] = (map[type] || noHandlers).concat(f) } } export function getHandlers(emitter, type) { return emitter._handlers && emitter._handlers[type] || noHandlers } export function off(emitter, type, f) { if (emitter.removeEventListener) { emitter.removeEventListener(type, f, false) } else if (emitter.detachEvent) { emitter.detachEvent("on" + type, f) } else { let map = emitter._handlers, arr = map && map[type] if (arr) { let index = indexOf(arr, f) if (index > -1) map[type] = arr.slice(0, index).concat(arr.slice(index + 1)) } } } export function signal(emitter, type /*, values...*/) { let handlers = getHandlers(emitter, type) if (!handlers.length) return let args = Array.prototype.slice.call(arguments, 2) for (let i = 0; i < handlers.length; ++i) handlers[i].apply(null, args) } // The DOM events that CodeMirror handles can be overridden by // registering a (non-DOM) handler on the editor for the event name, // and preventDefault-ing the event in that handler. export function signalDOMEvent(cm, e, override) { if (typeof e == "string") e = {type: e, preventDefault: function() { this.defaultPrevented = true }} signal(cm, override || e.type, cm, e) return e_defaultPrevented(e) || e.codemirrorIgnore } export function signalCursorActivity(cm) { let arr = cm._handlers && cm._handlers.cursorActivity if (!arr) return let set = cm.curOp.cursorActivityHandlers || (cm.curOp.cursorActivityHandlers = []) for (let i = 0; i < arr.length; ++i) if (indexOf(set, arr[i]) == -1) set.push(arr[i]) } export function hasHandler(emitter, type) { return getHandlers(emitter, type).length > 0 } // Add on and off methods to a constructor's prototype, to make // registering events on such objects more convenient. export function eventMixin(ctor) { ctor.prototype.on = function(type, f) {on(this, type, f)} ctor.prototype.off = function(type, f) {off(this, type, f)} } // Due to the fact that we still support jurassic IE versions, some // compatibility wrappers are needed. export function e_preventDefault(e) { if (e.preventDefault) e.preventDefault() else e.returnValue = false } export function e_stopPropagation(e) { if (e.stopPropagation) e.stopPropagation() else e.cancelBubble = true } export function e_defaultPrevented(e) { return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == false } export function e_stop(e) {e_preventDefault(e); e_stopPropagation(e)} export function e_target(e) {return e.target || e.srcElement} export function e_button(e) { let b = e.which if (b == null) { if (e.button & 1) b = 1 else if (e.button & 2) b = 3 else if (e.button & 4) b = 2 } if (mac && e.ctrlKey && b == 1) b = 3 return b }