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