v1.2.1

Author: jgermade

dist/azazel.js

@@ -0,0 +1,133 @@
+'use strict';
+
+/* global global, window, self */
+
+var _asyncNextTick = (function (_global, _raf_prefixes) {
+
+  if( 'nextTick' in _global ) return _global.nextTick
+
+  for( var _prefix in _raf_prefixes ) {
+    if( _global[_prefix + 'equestAnimationFrame'] instanceof Function )
+      return _global[_prefix + 'equestAnimationFrame']
+  }
+
+  return setTimeout
+
+})(
+  typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : typeof window !== 'undefined' ? window : {},
+  'r, webkitR, mozR, oR, msR'.split(/ *, */)
+);
+
+var _syncNextTick = function (fn) { fn.apply(this, arguments); };
+
+function _removeFromList ( list, item ) {
+  for( var i = list.length - 1 ; i >= 0 ; i-- ) {
+    if( item === list[i] ) list.splice(i, 1);
+  }
+}
+
+function _normalizeEventName (fn, host, test_listener) {
+  return function _fn (event_name, listener, use_capture) {
+    if( test_listener !== false && !(listener instanceof Function ) ) throw new Error('listener should be a Function')
+
+    if( event_name instanceof Array ) {
+      event_name.forEach(function (_event_name) {
+        _fn(_event_name, listener, use_capture);
+      });
+      return host
+    }
+    // runAsArray(fn, arguments, this, host );
+    if( typeof event_name !== 'string' ) throw new Error('event_name should be a string')
+    if( / /.test(event_name) ) return _fn(event_name.split(/ +/), listener, use_capture)
+
+    fn.apply(this, arguments);
+
+    return host
+  }
+}
+
+function Azazel (host, options) {
+  options = options || {};
+  if( typeof options === 'string' ) options = {
+    prefix: options
+  };
+  options.prefix = options.prefix || '';
+
+  host = host || (this instanceof Azazel ? this : {});
+
+  var listeners = {},
+      listeners_once = {},
+      events_emitted = {},
+      _nextTick = options.async !== false ? _asyncNextTick : _syncNextTick;
+
+  function _on (event_name, listener, use_capture) {
+    listeners[event_name] = listeners[event_name] || [];
+    if( use_capture ) listeners[event_name].unshift(listener);
+    else listeners[event_name].push(listener);
+  }
+
+  var on = _normalizeEventName(_on, host);
+
+  function _once (event_name, listener, use_capture) {
+    listeners_once[event_name] = listeners_once[event_name] || [];
+    if( use_capture ) listeners_once[event_name].unshift(listener);
+    else listeners_once[event_name].push(listener);
+  }
+
+  var once = _normalizeEventName(_once, host);
+
+  function watch (event_name, listener, use_capture) {
+    if( !(listener instanceof Function ) ) throw new Error('listener should be a Function')
+    var last_emitted = events_emitted[event_name];
+    if( last_emitted ) listener.apply(last_emitted.this_arg, last_emitted.args);
+    if( !last_emitted || use_capture !== 'once' ) _on(event_name, listener, use_capture);
+    return host
+  }
+
+  function _emit (event_name, args, this_arg) {
+    _nextTick(function () {
+      events_emitted[event_name] = { args: args, this_arg: this_arg };
+
+      if( listeners[event_name] ) listeners[event_name].forEach(function (listener) {
+        listener.apply(this_arg, args || []);
+      });
+
+      if( listeners_once[event_name] ) {
+        _emitOnce(listeners_once[event_name], args, this_arg);
+        delete listeners_once[event_name];
+      }
+    });
+  }
+
+  function _emitOnce (listeners_list, args, this_arg) {
+    listeners_list.forEach(function (listener) {
+      listener.apply(this_arg, args || []);
+    });
+
+    for( var event_name in listeners_once ) {
+      if( listeners_once[event_name] !== listeners_list ) listeners_list.forEach(function (_listener) {
+        if( listeners_once[event_name] ) _removeFromList(listeners_once[event_name], _listener );
+      });
+    }
+  }
+
+  var emit = _normalizeEventName(_emit, host, false);
+
+  function off (event_name, listener) {
+    if( listeners[event_name] ) _removeFromList(listeners[event_name], listener );
+    if( listeners_once[event_name] ) _removeFromList(listeners_once[event_name], listener );
+  }
+
+  host[options.prefix + 'on'] = on;
+  host[options.prefix + 'once'] = once;
+  host[options.prefix + 'watch'] = watch; // like watch but triggering
+
+  host[options.prefix + 'emit'] = emit;
+  host[options.prefix + 'off'] = _normalizeEventName(off);
+
+  return host
+}
+
+Azazel.nextTick = _asyncNextTick;
+
+module.exports = Azazel;