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| 'use strict';
angular.module('mgcrea.ngStrap.typeahead', ['mgcrea.ngStrap.tooltip', 'mgcrea.ngStrap.helpers.parseOptions'])
.provider('$typeahead', function() {
var defaults = this.defaults = {
animation: 'am-fade',
prefixClass: 'typeahead',
prefixEvent: '$typeahead',
placement: 'bottom-left',
template: 'typeahead/typeahead.tpl.html',
trigger: 'focus',
container: false,
keyboard: true,
html: false,
delay: 0,
minLength: 1,
filter: 'filter',
limit: 6,
autoSelect: false,
comparator: '',
trimValue: true
};
this.$get = function($window, $rootScope, $tooltip, $timeout) {
var bodyEl = angular.element($window.document.body);
function TypeaheadFactory(element, controller, config) {
var $typeahead = {};
// Common vars
var options = angular.extend({}, defaults, config);
$typeahead = $tooltip(element, options);
var parentScope = config.scope;
var scope = $typeahead.$scope;
scope.$resetMatches = function(){
scope.$matches = [];
scope.$activeIndex = options.autoSelect ? 0 : -1; // If set to 0, the first match will be highlighted
};
scope.$resetMatches();
scope.$activate = function(index) {
scope.$$postDigest(function() {
$typeahead.activate(index);
});
};
scope.$select = function(index, evt) {
scope.$$postDigest(function() {
$typeahead.select(index);
});
};
scope.$isVisible = function() {
return $typeahead.$isVisible();
};
// Public methods
$typeahead.update = function(matches) {
scope.$matches = matches;
Iif(scope.$activeIndex >= matches.length) {
scope.$activeIndex = options.autoSelect ? 0: -1;
}
// When the placement is not one of the bottom placements, re-calc the positioning
// so the results render correctly.
if (/^(bottom|bottom-left|bottom-right)$/.test(options.placement)) return;
// wrap in a $timeout so the results are updated
// before repositioning
$timeout($typeahead.$applyPlacement);
};
$typeahead.activate = function(index) {
scope.$activeIndex = index;
};
$typeahead.select = function(index) {
Iif(index === -1) return;
var value = scope.$matches[index].value;
// console.log('$setViewValue', value);
controller.$setViewValue(value);
controller.$render();
scope.$resetMatches();
if(parentScope) parentScope.$digest();
// Emit event
scope.$emit(options.prefixEvent + '.select', value, index, $typeahead);
};
// Protected methods
$typeahead.$isVisible = function() {
Iif(!options.minLength || !controller) {
return !!scope.$matches.length;
}
// minLength support
return scope.$matches.length && angular.isString(controller.$viewValue) && controller.$viewValue.length >= options.minLength;
};
$typeahead.$getIndex = function(value) {
var l = scope.$matches.length, i = l;
if(!l) return;
for(i = l; i--;) {
if(scope.$matches[i].value === value) break;
}
if(i < 0) return;
return i;
};
$typeahead.$onMouseDown = function(evt) {
// Prevent blur on mousedown
evt.preventDefault();
evt.stopPropagation();
};
$typeahead.$onKeyDown = function(evt) {
if(!/(38|40|13)/.test(evt.keyCode)) return;
// Let ngSubmit pass if the typeahead tip is hidden or no option is selected
if($typeahead.$isVisible() && !(evt.keyCode === 13 && scope.$activeIndex === -1)) {
evt.preventDefault();
evt.stopPropagation();
}
// Select with enter
if(evt.keyCode === 13 && scope.$matches.length) {
$typeahead.select(scope.$activeIndex);
}
// Navigate with keyboard
else if(evt.keyCode === 38 && scope.$activeIndex > 0) scope.$activeIndex--;
else if(evt.keyCode === 40 && scope.$activeIndex < scope.$matches.length - 1) scope.$activeIndex++;
else if(angular.isUndefined(scope.$activeIndex)) scope.$activeIndex = 0;
scope.$digest();
};
// Overrides
var show = $typeahead.show;
$typeahead.show = function() {
show();
// use timeout to hookup the events to prevent
// event bubbling from being processed imediately.
$timeout(function() {
$typeahead.$element.on('mousedown', $typeahead.$onMouseDown);
Eif(options.keyboard) {
element.on('keydown', $typeahead.$onKeyDown);
}
}, 0, false);
};
var hide = $typeahead.hide;
$typeahead.hide = function() {
$typeahead.$element.off('mousedown', $typeahead.$onMouseDown);
Eif(options.keyboard) {
element.off('keydown', $typeahead.$onKeyDown);
}
Eif(!options.autoSelect)
$typeahead.activate(-1);
hide();
};
return $typeahead;
}
TypeaheadFactory.defaults = defaults;
return TypeaheadFactory;
};
})
.directive('bsTypeahead', function($window, $parse, $q, $typeahead, $parseOptions) {
var defaults = $typeahead.defaults;
return {
restrict: 'EAC',
require: 'ngModel',
link: function postLink(scope, element, attr, controller) {
// Directive options
var options = {scope: scope};
angular.forEach(['placement', 'container', 'delay', 'trigger', 'keyboard', 'html', 'animation', 'template', 'filter', 'limit', 'minLength', 'watchOptions', 'selectMode', 'autoSelect', 'comparator', 'id', 'prefixEvent', 'prefixClass'], function(key) {
if(angular.isDefined(attr[key])) options[key] = attr[key];
});
// use string regex match boolean attr falsy values, leave truthy values be
var falseValueRegExp = /^(false|0|)$/i;
angular.forEach(['html', 'container', 'trimValue'], function(key) {
if(angular.isDefined(attr[key]) && falseValueRegExp.test(attr[key])) options[key] = false;
});
// Disable browser autocompletion
element.attr('autocomplete' ,'off');
// Build proper bsOptions
var filter = options.filter || defaults.filter;
var limit = options.limit || defaults.limit;
var comparator = options.comparator || defaults.comparator;
var bsOptions = attr.bsOptions;
Eif(filter) bsOptions += ' | ' + filter + ':$viewValue';
if (comparator) bsOptions += ':' + comparator;
Eif(limit) bsOptions += ' | limitTo:' + limit;
var parsedOptions = $parseOptions(bsOptions);
// Initialize typeahead
var typeahead = $typeahead(element, controller, options);
// Watch options on demand
if(options.watchOptions) {
// Watch bsOptions values before filtering for changes, drop function calls
var watchedOptions = parsedOptions.$match[7].replace(/\|.+/, '').replace(/\(.*\)/g, '').trim();
scope.$watchCollection(watchedOptions, function (newValue, oldValue) {
// console.warn('scope.$watch(%s)', watchedOptions, newValue, oldValue);
parsedOptions.valuesFn(scope, controller).then(function (values) {
typeahead.update(values);
controller.$render();
});
});
}
// Watch model for changes
scope.$watch(attr.ngModel, function(newValue, oldValue) {
// console.warn('$watch', element.attr('ng-model'), newValue);
scope.$modelValue = newValue; // Publish modelValue on scope for custom templates
parsedOptions.valuesFn(scope, controller)
.then(function(values) {
// Prevent input with no future prospect if selectMode is truthy
// @TODO test selectMode
Iif(options.selectMode && !values.length && newValue.length > 0) {
controller.$setViewValue(controller.$viewValue.substring(0, controller.$viewValue.length - 1));
return;
}
Iif(values.length > limit) values = values.slice(0, limit);
var isVisible = typeahead.$isVisible();
isVisible && typeahead.update(values);
// Do not re-queue an update if a correct value has been selected
if(values.length === 1 && values[0].value === newValue) return;
!isVisible && typeahead.update(values);
// Queue a new rendering that will leverage collection loading
controller.$render();
});
});
// modelValue -> $formatters -> viewValue
controller.$formatters.push(function(modelValue) {
// console.warn('$formatter("%s"): modelValue=%o (%o)', element.attr('ng-model'), modelValue, typeof modelValue);
var displayValue = parsedOptions.displayValue(modelValue);
return displayValue === undefined ? '' : displayValue;
});
// Model rendering in view
controller.$render = function () {
// console.warn('$render', element.attr('ng-model'), 'controller.$modelValue', typeof controller.$modelValue, controller.$modelValue, 'controller.$viewValue', typeof controller.$viewValue, controller.$viewValue);
if(controller.$isEmpty(controller.$viewValue)) return element.val('');
var index = typeahead.$getIndex(controller.$modelValue);
var selected = angular.isDefined(index) ? typeahead.$scope.$matches[index].label : controller.$viewValue;
selected = angular.isObject(selected) ? parsedOptions.displayValue(selected) : selected;
var value = selected ? selected.toString().replace(/<(?:.|\n)*?>/gm, '') : '';
element.val(options.trimValue === false ? value : value.trim());
};
// Garbage collection
scope.$on('$destroy', function() {
Eif (typeahead) typeahead.destroy();
options = null;
typeahead = null;
});
}
};
});
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