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|
/* PARTIE 1 */
var EasyEvents = function() {
/* private */
var registeredDependencyActions = {};
var Dependency = function(target, dependencyAction) {
this.target = target;
this.dependencyAction = dependencyAction
this.triggers = new Array();
this.parameter = null;
this.runOpposite = false;
};
Dependency.prototype.when = function( triggerElement ) {
this.triggers.push( new DependencyTrigger(triggerElement) );
return this;
};
Dependency.prototype.and = Dependency.prototype.when;
Dependency.prototype.on = function (element) {
this.parameter = this.target;
this.target = element;
return this;
};
Dependency.prototype.from = Dependency.prototype.on;
Dependency.prototype.to = Dependency.prototype.on;
Dependency.prototype._with = function(param) {
this.parameter = param;
return this;
};
Dependency.prototype.appendListenerToLastTrigger = function(eventName, matchFunction, parameter) {
matchFunction = matchFunction || function() {return true;};
var lastAddedTrigger = this.triggers[this.triggers.length - 1];
lastAddedTrigger.matchFunction = matchFunction;
lastAddedTrigger.parameter = parameter;
lastAddedTrigger.registerEventListener(eventName, this);
};
Dependency.prototype.testMatch = function() {
var valid = true;
for(var i=0; i<this.triggers.length; i++) {
var currTrigger = this.triggers[i]
valid = valid && currTrigger.matchFunction(currTrigger.element, currTrigger.parameter);
}
if(valid) {
this.dependencyAction.run(this.target, this.parameter);
} else if(this.runOpposite) {
this.dependencyAction.reverse(this.target, this.parameter);
}
};
Dependency.prototype.reverseOtherwise = function() {
this.runOpposite = true;
};
var DependencyAction = function(actionMethod, reverseMethod) {
this.run = actionMethod;
this.reverse = reverseMethod || function(){};
};
var DependencyTrigger = function(triggerElement) {
this.element = document.getElementById(triggerElement);
this.matchFunction = null;
this.parameter = null;
};
DependencyTrigger.prototype.registerEventListener = function(eventName, dependency) {
if(window.attachEvent) {
this.element.attachEvent("on" + eventName, function(){dependency.testMatch();});
} else {
this.element.addEventListener(eventName, function(){dependency.testMatch();}, false);
}
};
/* public */
return {
registerDependencyAction : function(dependencyActionName, dependencyActionFunction, dependencyReverseFunction) {
registeredDependencyActions[dependencyActionName] = new DependencyAction(dependencyActionFunction, dependencyReverseFunction);
EasyEvents[dependencyActionName] = function(param) {
return new Dependency(param, registeredDependencyActions[dependencyActionName]);
}
},
registerTriggerListener : function(methodName, eventName, method) {
Dependency.prototype[methodName] = function(parameter) {
this.appendListenerToLastTrigger(eventName, method, parameter);
return this;
}
}
};
}();
/* PARTIE 2 : Enrichissement du vocabulaire */
with(EasyEvents) {
registerDependencyAction("show", function(element) {
document.getElementById(element).style.display = "block";
}, function(element) {
document.getElementById(element).style.display = "none";
});
registerDependencyAction("addClassName", function(element, parameter) {
var elem = document.getElementById(element);
var classNames = elem.className;
var newClassNames = classNames;
var idxStart = classNames.indexOf(parameter);
if(idxStart < 0) {
newClassNames += " " + parameter;
elem.className = newClassNames;
}
}, function(element, parameter) {
var elem = document.getElementById(element);
var classNames = elem.className;
var newClassNames = "";
idxStart = classNames.indexOf(parameter);
if(idxStart > 0) {
newClassNames += classNames.substr(0, idxStart - 1);
}
if(idxStart >= 0) {
newClassNames += classNames.substr(idxStart + parameter.length);
}
elem.className = newClassNames.replace(/^\s+|\s+$/, "").replace(/\s+/, " ");
});
registerDependencyAction("removeClassName", function(element, parameter) {
var elem = document.getElementById(element);
var classNames = elem.className;
var newClassNames = "";
idxStart = classNames.indexOf(parameter);
if(idxStart > 0) {
newClassNames += classNames.substr(0, idxStart - 1);
}
if(idxStart >= 0) {
newClassNames += classNames.substr(idxStart + parameter.length);
}
elem.className = newClassNames.replace(/^\s+|\s+$/, "").replace(/\s+/, " ");
}, function(element, parameter) {
var elem = document.getElementById(element);
var classNames = elem.className;
var newClassNames = classNames;
var idxStart = classNames.indexOf(parameter);
if(idxStart < 0) {
newClassNames += " " + parameter;
elem.className = newClassNames;
}
});
registerTriggerListener("isClicked", "click");
registerTriggerListener("is", "change", function(elem, param){return elem.value == param});
registerTriggerListener("isNot", "change", function(elem, param){return elem.value != param});
} |
