Code coverage report for src/event-manager.js

Statements: 64.04% (57 / 89)      Branches: 39.47% (15 / 38)      Functions: 51.85% (14 / 27)      Lines: 64.37% (56 / 87)      Ignored: none     

All files » src/ » event-manager.js
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System.register([], function (_export) {
  'use strict';
 
  var DefaultEventStrategy, EventManager;
 
  function _classCallCheck(instance, Constructor) { Iif (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }
 
  return {
    setters: [],
    execute: function () {
      DefaultEventStrategy = (function () {
        function DefaultEventStrategy() {
          _classCallCheck(this, DefaultEventStrategy);
 
          this.delegatedEvents = {};
        }
 
        DefaultEventStrategy.prototype.ensureDelegatedEvent = function ensureDelegatedEvent(eventName) {
          if (this.delegatedEvents[eventName]) {
            return;
          }
 
          this.delegatedEvents[eventName] = true;
          document.addEventListener(eventName, this.handleDelegatedEvent.bind(this), false);
        };
 
        DefaultEventStrategy.prototype.handleCallbackResult = function handleCallbackResult(result) {};
 
        DefaultEventStrategy.prototype.handleDelegatedEvent = function handleDelegatedEvent(event) {
          event = event || window.event;
          var target = event.target || event.srcElement,
              callback;
 
          while (target && !callback) {
            if (target.delegatedEvents) {
              callback = target.delegatedEvents[event.type];
            }
 
            if (!callback) {
              target = target.parentNode;
            }
          }
 
          if (callback) {
            this.handleCallbackResult(callback(event));
          }
        };
 
        DefaultEventStrategy.prototype.createDirectEventCallback = function createDirectEventCallback(callback) {
          var _this = this;
 
          return function (event) {
            _this.handleCallbackResult(callback(event));
          };
        };
 
        DefaultEventStrategy.prototype.subscribeToDelegatedEvent = function subscribeToDelegatedEvent(target, targetEvent, callback) {
          var lookup = target.delegatedEvents || (target.delegatedEvents = {});
 
          this.ensureDelegatedEvent(targetEvent);
          lookup[targetEvent] = callback;
 
          return function () {
            lookup[targetEvent] = null;
          };
        };
 
        DefaultEventStrategy.prototype.subscribeToDirectEvent = function subscribeToDirectEvent(target, targetEvent, callback) {
          var directEventCallback = this.createDirectEventCallback(callback);
          target.addEventListener(targetEvent, directEventCallback, false);
 
          return function () {
            target.removeEventListener(targetEvent, directEventCallback);
          };
        };
 
        DefaultEventStrategy.prototype.subscribe = function subscribe(target, targetEvent, callback, delegate) {
          if (delegate) {
            return this.subscribeToDelegatedEvent(target, targetEvent, callback);
          } else {
            return this.subscribeToDirectEvent(target, targetEvent, callback);
          }
        };
 
        return DefaultEventStrategy;
      })();
 
      EventManager = (function () {
        function EventManager() {
          _classCallCheck(this, EventManager);
 
          this.elementHandlerLookup = {};
          this.eventStrategyLookup = {};
 
          this.registerElementConfig({
            tagName: 'input',
            properties: {
              value: ['change', 'input'],
              checked: ['change', 'input']
            }
          });
 
          this.registerElementConfig({
            tagName: 'textarea',
            properties: {
              value: ['change', 'input']
            }
          });
 
          this.registerElementConfig({
            tagName: 'select',
            properties: {
              value: ['change']
            }
          });
 
          this.registerElementConfig({
            tagName: 'content editable',
            properties: {
              value: ['change', 'input', 'blur', 'keyup', 'paste']
            }
          });
 
          this.registerElementConfig({
            tagName: 'scrollable element',
            properties: {
              scrollTop: ['scroll'],
              scrollLeft: ['scroll']
            }
          });
 
          this.defaultEventStrategy = new DefaultEventStrategy();
        }
 
        EventManager.prototype.registerElementConfig = function registerElementConfig(config) {
          var tagName = config.tagName.toLowerCase(),
              properties = config.properties,
              propertyName;
          this.elementHandlerLookup[tagName] = {};
          for (propertyName in properties) {
            Eif (properties.hasOwnProperty(propertyName)) {
              this.registerElementPropertyConfig(tagName, propertyName, properties[propertyName]);
            }
          }
        };
 
        EventManager.prototype.registerElementPropertyConfig = function registerElementPropertyConfig(tagName, propertyName, events) {
          this.elementHandlerLookup[tagName][propertyName] = {
            subscribe: function subscribe(target, callback) {
              events.forEach(function (changeEvent) {
                target.addEventListener(changeEvent, callback, false);
              });
 
              return function () {
                events.forEach(function (changeEvent) {
                  target.removeEventListener(changeEvent, callback);
                });
              };
            }
          };
        };
 
        EventManager.prototype.registerElementHandler = function registerElementHandler(tagName, handler) {
          this.elementHandlerLookup[tagName.toLowerCase()] = handler;
        };
 
        EventManager.prototype.registerEventStrategy = function registerEventStrategy(eventName, strategy) {
          this.eventStrategyLookup[eventName] = strategy;
        };
 
        EventManager.prototype.getElementHandler = function getElementHandler(target, propertyName) {
          var tagName,
              lookup = this.elementHandlerLookup;
          Eif (target.tagName) {
            tagName = target.tagName.toLowerCase();
            if (lookup[tagName] && lookup[tagName][propertyName]) {
              return lookup[tagName][propertyName];
            }
            if (propertyName === 'textContent' || propertyName === 'innerHTML') {
              return lookup['content editable']['value'];
            }
            if (propertyName === 'scrollTop' || propertyName === 'scrollLeft') {
              return lookup['scrollable element'][propertyName];
            }
          }
 
          return null;
        };
 
        EventManager.prototype.addEventListener = function addEventListener(target, targetEvent, callback, delegate) {
          return (this.eventStrategyLookup[targetEvent] || this.defaultEventStrategy).subscribe(target, targetEvent, callback, delegate);
        };
 
        return EventManager;
      })();
 
      _export('EventManager', EventManager);
    }
  };
});
 
//todo: coroutine via result?
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Durandal Project/aurelia/binding/src/event-manager.js","sourcesContent":["class DefaultEventStrategy {\n  constructor(){\n    this.delegatedEvents = {};\n  }\n\n  ensureDelegatedEvent(eventName){\n    if(this.delegatedEvents[eventName]){\n      return;\n    }\n\n    this.delegatedEvents[eventName] = true;\n    document.addEventListener(eventName, this.handleDelegatedEvent.bind(this), false);\n  }\n\n  handleCallbackResult(result){\n    //todo: coroutine via result?\n  }\n\n  handleDelegatedEvent(event){\n    event = event || window.event;\n    var target = event.target || event.srcElement,\n        callback;\n\n    while(target && !callback) {\n      if(target.delegatedEvents){\n        callback = target.delegatedEvents[event.type];\n      }\n\n      if(!callback){\n        target = target.parentNode;\n      }\n    }\n\n    if(callback){\n      this.handleCallbackResult(callback(event));\n    }\n  }\n\n  createDirectEventCallback(callback){\n    return event => {\n      this.handleCallbackResult(callback(event));\n    };\n  }\n\n  subscribeToDelegatedEvent(target, targetEvent, callback){\n    var lookup = target.delegatedEvents || (target.delegatedEvents = {});\n\n    this.ensureDelegatedEvent(targetEvent);\n    lookup[targetEvent] = callback;\n\n    return function(){\n      lookup[targetEvent] = null;\n    };\n  }\n\n  subscribeToDirectEvent(target, targetEvent, callback){\n    var directEventCallback = this.createDirectEventCallback(callback);\n    target.addEventListener(targetEvent, directEventCallback, false);\n\n    return function(){\n      target.removeEventListener(targetEvent, directEventCallback);\n    };\n  }\n\n  subscribe(target, targetEvent, callback, delegate){\n    if(delegate){\n      return this.subscribeToDelegatedEvent(target, targetEvent, callback);\n    }else{\n      return this.subscribeToDirectEvent(target, targetEvent, callback);\n    }\n  }\n}\n\nexport class EventManager {\n  constructor(){\n    this.elementHandlerLookup = {};\n    this.eventStrategyLookup = {};\n\n    this.registerElementConfig({\n      tagName:'input',\n      properties: {\n        value:['change','input'],\n        checked:['change','input']\n      }\n    });\n\n    this.registerElementConfig({\n      tagName:'textarea',\n      properties:{\n        value:['change','input']\n      }\n    });\n\n    this.registerElementConfig({\n      tagName:'select',\n      properties:{\n        value:['change']\n      }\n    });\n\n    this.registerElementConfig({\n      tagName:'content editable',\n      properties: {\n        value:['change','input','blur','keyup','paste'],\n      }\n    });\n\n    this.registerElementConfig({\n      tagName:'scrollable element',\n      properties: {\n        scrollTop:['scroll'],\n        scrollLeft:['scroll']\n      }\n    });\n\n    this.defaultEventStrategy = new DefaultEventStrategy();\n  }\n\n  registerElementConfig(config){\n    var tagName = config.tagName.toLowerCase(), properties = config.properties, propertyName;\n    this.elementHandlerLookup[tagName] = {};\n    for(propertyName in properties){\n      if (properties.hasOwnProperty(propertyName)){\n        this.registerElementPropertyConfig(tagName, propertyName, properties[propertyName]);\n      }\n    }\n  }\n\n  registerElementPropertyConfig(tagName, propertyName, events) {\n    this.elementHandlerLookup[tagName][propertyName] = {\n      subscribe(target, callback) {\n        events.forEach(changeEvent => {\n          target.addEventListener(changeEvent, callback, false);\n        });\n\n        return function(){\n          events.forEach(changeEvent => {\n            target.removeEventListener(changeEvent, callback);\n          });\n        }\n      }\n    }\n  }\n\n  registerElementHandler(tagName, handler){\n    this.elementHandlerLookup[tagName.toLowerCase()] = handler;\n  }\n\n  registerEventStrategy(eventName, strategy){\n    this.eventStrategyLookup[eventName] = strategy;\n  }\n\n  getElementHandler(target, propertyName){\n    var tagName, lookup = this.elementHandlerLookup;\n    if(target.tagName){\n      tagName = target.tagName.toLowerCase();\n      if(lookup[tagName] && lookup[tagName][propertyName]){\n        return lookup[tagName][propertyName];\n      }\n      if (propertyName === 'textContent' || propertyName === 'innerHTML'){\n        return lookup['content editable']['value'];\n      }\n      if (propertyName === 'scrollTop' || propertyName === 'scrollLeft'){\n        return lookup['scrollable element'][propertyName];\n      }\n    }\n\n    return null;\n  }\n\n  addEventListener(target, targetEvent, callback, delegate){\n    return (this.eventStrategyLookup[targetEvent] || this.defaultEventStrategy)\n      .subscribe(target, targetEvent, callback, delegate);\n  }\n}\n"]}