/**
* Enhanced Select2 Dropmenus
*
* @AJAX Mode - When in this mode, your value will be an object (or array of objects) of the data used by Select2
* This change is so that you do not have to do an additional query yourself on top of Select2's own query
* @params [options] {object} The configuration options passed to $.fn.select2(). Refer to the documentation
*/
angular.module('ui.select2', []).value('uiSelect2Config', {}).directive('uiSelect2', ['uiSelect2Config', '$timeout', function (uiSelect2Config, $timeout) {
var options = {};
if (uiSelect2Config) {
angular.extend(options, uiSelect2Config);
}
return {
require: 'ngModel',
compile: function (tElm, tAttrs) {
var watch,
repeatOption,
repeatAttr,
isSelect = tElm.is('select'),
isMultiple = (tAttrs.multiple !== undefined);
// Enable watching of the options dataset if in use
if (tElm.is('select')) {
repeatOption = tElm.find('option[ng-repeat], option[data-ng-repeat]');
if (repeatOption.length) {
repeatAttr = repeatOption.attr('ng-repeat') || repeatOption.attr('data-ng-repeat');
watch = jQuery.trim(repeatAttr.split('|')[0]).split(' ').pop();
}
}
return function (scope, elm, attrs, controller) {
// instance-specific options
var opts = angular.extend({}, options, scope.$eval(attrs.uiSelect2));
/*
Convert from Select2 view-model to Angular view-model.
*/
var convertToAngularModel = function(select2_data) {
var model;
if (opts.simple_tags) {
model = []
angular.forEach(select2_data, function(value, index) {
model.push(value.id)
})
} else {
model = select2_data
}
return model
}
/*
Convert from Angular view-model to Select2 view-model.
*/
var convertToSelect2Model = function(angular_data) {
var model = []
if (!angular_data) {
return model;
}
if (opts.simple_tags) {
model = [];
angular.forEach(
angular_data,
function(value, index) {
model.push({'id': value, 'text': value});
})
} else {
model = angular_data;
}
return model
}
if (isSelect) {
// Use <select multiple> instead
delete opts.multiple;
delete opts.initSelection;
} else if (isMultiple) {
opts.multiple = true;
}
if (controller) {
// Watch the model for programmatic changes
scope.$watch(tAttrs.ngModel, function(current, old) {
if (!current) {
return
}
if (current == old) {
return
}
controller.$render()
}, true)
controller.$render = function () {
if (isSelect) {
elm.select2('val', controller.$viewValue);
} else {
if (opts.multiple) {
elm.select2(
'data', convertToSelect2Model(controller.$viewValue));
} else {
if (angular.isObject(controller.$viewValue)) {
elm.select2('data', controller.$viewValue);
} else if (!controller.$viewValue) {
elm.select2('data', null);
} else {
elm.select2('val', controller.$viewValue);
}
}
}
};
// Watch the options dataset for changes
if (watch) {
scope.$watch(watch, function (newVal, oldVal, scope) {
if (!newVal) return;
// Delayed so that the options have time to be rendered
$timeout(function () {
elm.select2('val', controller.$viewValue);
// Refresh angular to remove the superfluous option
elm.trigger('change');
});
});
}
// Update valid and dirty statuses
controller.$parsers.push(function (value) {
var div = elm.prev()
div
.toggleClass('ng-invalid', !controller.$valid)
.toggleClass('ng-valid', controller.$valid)
.toggleClass('ng-invalid-required', !controller.$valid)
.toggleClass('ng-valid-required', controller.$valid)
.toggleClass('ng-dirty', controller.$dirty)
.toggleClass('ng-pristine', controller.$pristine);
return value;
});
if (!isSelect) {
// Set the view and model value and update the angular template manually for the ajax/multiple select2.
elm.bind("change", function () {
if (scope.$$phase) return;
scope.$apply(function () {
controller.$setViewValue(
convertToAngularModel(elm.select2('data')));
});
});
if (opts.initSelection) {
var initSelection = opts.initSelection;
opts.initSelection = function (element, callback) {
initSelection(element, function (value) {
controller.$setViewValue(convertToAngularModel(value));
callback(value);
});
};
}
}
}
elm.bind("$destroy", function() {
elm.select2("destroy");
});
attrs.$observe('disabled', function (value) {
elm.select2('enable', !value);
});
attrs.$observe('readonly', function (value) {
elm.select2('readonly', !!value);
});
if (attrs.ngMultiple) {
scope.$watch(attrs.ngMultiple, function(newVal) {
elm.select2(opts);
});
}
// Initialize the plugin late so that the injected DOM does not disrupt the template compiler
$timeout(function () {
elm.select2(opts);
// Set initial value - I'm not sure about this but it seems to need to be there
elm.val(controller.$viewValue);
// important!
controller.$render();
// Not sure if I should just check for !isSelect OR if I should check for 'tags' key
if (!opts.initSelection && !isSelect)
controller.$setViewValue(
convertToAngularModel(elm.select2('data')));
});
};
}
};
}]);