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'use strict';
/**
* Bindonce - Zero watches binding for AngularJs
* @version v0.2.1 - 2013-05-07
* @link https://github.com/Pasvaz/bindonce
* @author Pasquale Vazzana
* @license MIT License, http://www.opensource.org/licenses/MIT
*/
angular.module('pasvaz.bindonce', [])
.directive('bindonce', function()
{
var toBoolean = function(value)
{
if (value && value.length !== 0)
{
var v = angular.lowercase("" + value);
value = !(v == 'f' || v == '0' || v == 'false' || v == 'no' || v == 'n' || v == '[]');
}
else
{
value = false;
}
return value;
}
var msie = parseInt((/msie (\d+)/.exec(angular.lowercase(navigator.userAgent)) || [])[1], 10);
if (isNaN(msie))
{
msie = parseInt((/trident\/.*; rv:(\d+)/.exec(angular.lowercase(navigator.userAgent)) || [])[1], 10);
}
var bindonceDirective =
{
restrict: "AM",
controller: ['$scope', '$element', '$attrs', '$interpolate', function($scope, $element, $attrs, $interpolate)
{
var showHideBinder = function(elm, attr, value)
{
var show = (attr == 'show') ? '' : 'none';
var hide = (attr == 'hide') ? '' : 'none';
elm.css('display', toBoolean(value) ? show : hide);
}
var classBinder = function(elm, value)
{
if (angular.isObject(value) && !angular.isArray(value))
{
var results = [];
angular.forEach(value, function(value, index)
{
if (value) results.push(index);
});
value = results;
}
if (value)
{
elm.addClass(angular.isArray(value) ? value.join(' ') : value);
}
}
var ctrl =
{
watcherRemover : undefined,
binders : [],
group : $attrs.boName,
element : $element,
ran : false,
addBinder : function(binder)
{
this.binders.push(binder);
// In case of late binding (when using the directive bo-name/bo-parent)
// it happens only when you use nested bindonce, if the bo-children
// are not dom children the linking can follow another order
if (this.ran)
{
this.runBinders();
}
},
setupWatcher : function(bindonceValue)
{
var that = this;
this.watcherRemover = $scope.$watch(bindonceValue, function(newValue)
{
if (newValue == undefined) return;
that.removeWatcher();
that.runBinders();
}, true);
},
removeWatcher : function()
{
if (this.watcherRemover != undefined)
{
this.watcherRemover();
this.watcherRemover = undefined;
}
},
runBinders : function()
{
var i, max;
for (i = 0, max = this.binders.length; i < max; i ++)
{
var binder = this.binders[i];
if (this.group && this.group != binder.group ) continue;
var value = binder.scope.$eval((binder.interpolate) ? $interpolate(binder.value) : binder.value);
switch(binder.attr)
{
case 'if':
if (toBoolean(value))
{
binder.transclude(binder.scope.$new(), function (clone)
{
var parent = binder.element.parent();
var afterNode = binder.element && binder.element[binder.element.length - 1];
var parentNode = parent && parent[0] || afterNode && afterNode.parentNode;
var afterNextSibling = (afterNode && afterNode.nextSibling) || null;
angular.forEach(clone, function(node)
{
parentNode.insertBefore(node, afterNextSibling);
});
});
}
break;
case 'hide':
case 'show':
showHideBinder(binder.element, binder.attr, value);
break;
case 'class':
classBinder(binder.element, value);
break;
case 'text':
binder.element.text(value);
break;
case 'html':
binder.element.html(value);
break;
case 'style':
binder.element.css(value);
break;
case 'src':
binder.element.attr(binder.attr, value);
if (msie) binder.element.prop('src', value);
case 'attr':
angular.forEach(binder.attrs, function(attrValue, attrKey)
{
var newAttr, newValue;
if (attrKey.match(/^boAttr./) && binder.attrs[attrKey])
{
newAttr = attrKey.replace(/^boAttr/, '').replace(/([a-z])([A-Z])/g, '$1-$2').toLowerCase();
newValue = binder.scope.$eval(binder.attrs[attrKey]);
binder.element.attr(newAttr, newValue);
}
});
break;
case 'href':
case 'alt':
case 'title':
case 'id':
case 'value':
binder.element.attr(binder.attr, value);
break;
}
}
this.ran = true;
this.binders = [];
}
}
return ctrl;
}],
link: function(scope, elm, attrs, bindonceController)
{
var value = (attrs.bindonce) ? scope.$eval(attrs.bindonce) : true;
if (value != undefined)
{
bindonceController.runBinders();
}
else
{
bindonceController.setupWatcher(attrs.bindonce);
elm.bind("$destroy", bindonceController.removeWatcher);
}
}
};
return bindonceDirective;
});
angular.forEach(
[
{directiveName:'boShow', attribute: 'show'},
{directiveName:'boIf', attribute: 'if', transclude: 'element', terminal: true, priority:1000},
{directiveName:'boHide', attribute:'hide'},
{directiveName:'boClass', attribute:'class'},
{directiveName:'boText', attribute:'text'},
{directiveName:'boHtml', attribute:'html'},
{directiveName:'boSrcI', attribute:'src', interpolate:true},
{directiveName:'boSrc', attribute:'src'},
{directiveName:'boHrefI', attribute:'href', interpolate:true},
{directiveName:'boHref', attribute:'href'},
{directiveName:'boAlt', attribute:'alt'},
{directiveName:'boTitle', attribute:'title'},
{directiveName:'boId', attribute:'id'},
{directiveName:'boStyle', attribute:'style'},
{directiveName:'boValue', attribute:'value'},
{directiveName:'boAttr', attribute:'attr'}
],
function(boDirective)
{
var childPriority = 200;
return angular.module('pasvaz.bindonce').directive(boDirective.directiveName, function()
{
var bindonceDirective =
{
priority: boDirective.priority || childPriority,
transclude: boDirective.transclude || false,
terminal: boDirective.terminal || false,
require: '^bindonce',
compile: function (tElement, tAttrs, transclude)
{
return function(scope, elm, attrs, bindonceController)
{
var name = attrs.boParent;
if (name && bindonceController.group != name)
{
var element = bindonceController.element.parent();
bindonceController = undefined;
var parentValue;
while (element[0].nodeType != 9 && element.length)
{
if ((parentValue = element.data('$bindonceController'))
&& parentValue.group == name)
{
bindonceController = parentValue
break;
}
element = element.parent();
}
if (!bindonceController)
{
throw Error("No bindonce controller: " + name);
}
}
bindonceController.addBinder(
{
element : elm,
attr : boDirective.attribute,
attrs : attrs,
value : attrs[boDirective.directiveName],
interpolate : boDirective.interpolate,
group : name,
transclude : transclude,
scope : scope
});
}
}
}
return bindonceDirective;
});
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