Mon 21 Jul 22:43:21 CEST 2025

js/term/events.js

@@ -0,0 +1,197 @@
+/**
+ * Version 1.1.2
+ * events.js - event emitter for blessed
+ * Copyright (c) 2013-2015, Christopher Jeffrey and contributors (MIT License).
+ * https://github.com/chjj/blessed
+ */
+
+var slice = Array.prototype.slice;
+
+/**
+ * EventEmitter
+ */
+
+function EventEmitter() {
+  if (!this._events) this._events = {};
+}
+
+EventEmitter.prototype.setMaxListeners = function(n) {
+  this._maxListeners = n;
+};
+
+EventEmitter.prototype.addListener = function(type, listener) {
+  if (!this._events[type]) {
+    this._events[type] = listener;
+  } else if (typeof this._events[type] === 'function') {
+    this._events[type] = [this._events[type], listener];
+  } else {
+    this._events[type].push(listener);
+  }
+  this._emit('newListener', [type, listener]);
+};
+
+EventEmitter.prototype.on = EventEmitter.prototype.addListener;
+
+EventEmitter.prototype.removeListener = function(type, listener) {
+  var handler = this._events[type];
+  if (!handler) return;
+
+  if (typeof handler === 'function' ) {
+    if (!(handler === listener)) return;
+    delete this._events[type];
+    this._emit('removeListener', [type, listener]);
+    return;
+  }
+  if (handler.length === 1) {
+    if (!(handler[0] === listener)) return;    
+    delete this._events[type];
+    this._emit('removeListener', [type, listener]);
+    return;
+  }
+
+  for (var i = 0; i < handler.length; i++) {
+    if (handler[i] === listener || handler[i].listener === listener) {
+      handler.splice(i, 1);
+      this._emit('removeListener', [type, listener]);
+      return;
+    }
+  }
+};
+
+EventEmitter.prototype.off = EventEmitter.prototype.removeListener;
+
+EventEmitter.prototype.removeAllListeners = function(type) {
+  if (type) {
+    delete this._events[type];
+  } else {
+    this._events = {};
+  }
+};
+
+EventEmitter.prototype.once = function(type, listener) {
+  function on() {
+    this.removeListener(type, on);
+    return listener.apply(this, arguments);
+  }
+  on.listener = listener;
+  return this.on(type, on);
+};
+
+EventEmitter.prototype.listeners = function(type) {
+  return typeof this._events[type] === 'function'
+    ? [this._events[type]]
+    : this._events[type] || [];
+};
+
+EventEmitter.prototype._emit = function(type, args) {
+  var handler = this._events[type]
+    , ret;
+
+  // if (type !== 'event') {
+  //   this._emit('event', [type.replace(/^element /, '')].concat(args));
+  // }
+
+  if (!handler) {
+    if (type === 'error') {
+      throw new args[0];
+    }
+    return;
+  }
+
+  if (typeof handler === 'function') {
+    return handler.apply(this, args);
+  }
+
+  for (var i = 0; i < handler.length; i++) {
+    if (handler[i].apply(this, args) === false) {
+      ret = false;
+    }
+  }
+
+  return ret !== false;
+};
+
+EventEmitter.prototype.emit = function(type) {
+  var args = slice.call(arguments, 1)
+    , params = slice.call(arguments)
+    , el = this;
+
+  this._emit('event', params);
+
+  if (this.type === 'screen') {
+    return this._emit(type, args);
+  }
+
+  if (this._emit(type, args) === false) {
+    return false;
+  }
+
+  type = 'element ' + type;
+  args.unshift(this);
+  // `element` prefix
+  // params = [type].concat(args);
+  // no `element` prefix
+  // params.splice(1, 0, this);
+
+  do {
+    // el._emit('event', params);
+    if (!el._events[type]) continue;
+    if (el._emit(type, args) === false) {
+      return false;
+    }
+  } while (el = el.parent);
+
+  return true;
+};
+
+// For hooking into the main EventEmitter if we want to.
+// Might be better to do things this way being that it
+// will always be compatible with node, not to mention
+// it gives us domain support as well.
+// Node.prototype._emit = Node.prototype.emit;
+// Node.prototype.emit = function(type) {
+//   var args, el;
+//
+//   if (this.type === 'screen') {
+//     return this._emit.apply(this, arguments);
+//   }
+//
+//   this._emit.apply(this, arguments);
+//   if (this._bubbleStopped) return false;
+//
+//   args = slice.call(arguments, 1);
+//   el = this;
+//
+//   args.unshift('element ' + type, this);
+//   this._bubbleStopped = false;
+//   //args.push(stopBubble);
+//
+//   do {
+//     if (!el._events || !el._events[type]) continue;
+//     el._emit.apply(el, args);
+//     if (this._bubbleStopped) return false;
+//   } while (el = el.parent);
+//
+//   return true;
+// };
+//
+// Node.prototype._addListener = Node.prototype.addListener;
+// Node.prototype.on =
+// Node.prototype.addListener = function(type, listener) {
+//   function on() {
+//     if (listener.apply(this, arguments) === false) {
+//       this._bubbleStopped = true;
+//     }
+//   }
+//   on.listener = listener;
+//   return this._addListener(type, on);
+// };
+
+/**
+ * Expose
+ */
+
+exports = EventEmitter;
+exports.EventEmitter = EventEmitter;
+
+module.exports = exports;