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18 <pre class="prettyprint lang-js"><span id='Ext-util-Filter-method-constructor'><span id='Ext-util-Filter'>/**
19 </span></span> * @class Ext.util.Filter
21 * <p>Represents a filter that can be applied to a {@link Ext.util.MixedCollection MixedCollection}. Can either simply
22 * filter on a property/value pair or pass in a filter function with custom logic. Filters are always used in the context
23 * of MixedCollections, though {@link Ext.data.Store Store}s frequently create them when filtering and searching on their
24 * records. Example usage:</p>
25 <pre><code>
26 //set up a fictional MixedCollection containing a few people to filter on
27 var allNames = new Ext.util.MixedCollection();
29 {id: 1, name: 'Ed', age: 25},
30 {id: 2, name: 'Jamie', age: 37},
31 {id: 3, name: 'Abe', age: 32},
32 {id: 4, name: 'Aaron', age: 26},
33 {id: 5, name: 'David', age: 32}
36 var ageFilter = new Ext.util.Filter({
41 var longNameFilter = new Ext.util.Filter({
42 filterFn: function(item) {
43 return item.name.length > 4;
47 //a new MixedCollection with the 3 names longer than 4 characters
48 var longNames = allNames.filter(longNameFilter);
50 //a new MixedCollection with the 2 people of age 24:
51 var youngFolk = allNames.filter(ageFilter);
52 </code></pre>
54 * @param {Object} config Config object
56 Ext.define('Ext.util.Filter', {
58 /* Begin Definitions */
61 <span id='Ext-util-Filter-cfg-property'> /**
62 </span> * @cfg {String} property The property to filter on. Required unless a {@link #filter} is passed
65 <span id='Ext-util-Filter-cfg-filterFn'> /**
66 </span> * @cfg {Function} filterFn A custom filter function which is passed each item in the {@link Ext.util.MixedCollection}
67 * in turn. Should return true to accept each item or false to reject it
70 <span id='Ext-util-Filter-cfg-anyMatch'> /**
71 </span> * @cfg {Boolean} anyMatch True to allow any match - no regex start/end line anchors will be added. Defaults to false
75 <span id='Ext-util-Filter-cfg-exactMatch'> /**
76 </span> * @cfg {Boolean} exactMatch True to force exact match (^ and $ characters added to the regex). Defaults to false.
77 * Ignored if anyMatch is true.
81 <span id='Ext-util-Filter-cfg-caseSensitive'> /**
82 </span> * @cfg {Boolean} caseSensitive True to make the regex case sensitive (adds 'i' switch to regex). Defaults to false.
86 <span id='Ext-util-Filter-cfg-root'> /**
87 </span> * @cfg {String} root Optional root property. This is mostly useful when filtering a Store, in which case we set the
88 * root to 'data' to make the filter pull the {@link #property} out of the data object of each item
91 constructor: function(config) {
92 Ext.apply(this, config);
94 //we're aliasing filter to filterFn mostly for API cleanliness reasons, despite the fact it dirties the code here.
95 //Ext.util.Sorter takes a sorterFn property but allows .sort to be called - we do the same here
96 this.filter = this.filter || this.filterFn;
98 if (this.filter == undefined) {
99 if (this.property == undefined || this.value == undefined) {
100 // Commented this out temporarily because it stops us using string ids in models. TODO: Remove this once
101 // Model has been updated to allow string ids
103 // Ext.Error.raise("A Filter requires either a property or a filterFn to be set");
105 this.filter = this.createFilterFn();
108 this.filterFn = this.filter;
112 <span id='Ext-util-Filter-method-createFilterFn'> /**
114 * Creates a filter function for the configured property/value/anyMatch/caseSensitive options for this Filter
116 createFilterFn: function() {
118 matcher = me.createValueMatcher(),
119 property = me.property;
121 return function(item) {
122 return matcher.test(me.getRoot.call(me, item)[property]);
126 <span id='Ext-util-Filter-method-getRoot'> /**
128 * Returns the root property of the given item, based on the configured {@link #root} property
129 * @param {Object} item The item
130 * @return {Object} The root property of the object
132 getRoot: function(item) {
133 return this.root == undefined ? item : item[this.root];
136 <span id='Ext-util-Filter-method-createValueMatcher'> /**
138 * Returns a regular expression based on the given value and matching options
140 createValueMatcher : function() {
143 anyMatch = me.anyMatch,
144 exactMatch = me.exactMatch,
145 caseSensitive = me.caseSensitive,
146 escapeRe = Ext.String.escapeRegex;
148 if (!value.exec) { // not a regex
149 value = String(value);
151 if (anyMatch === true) {
152 value = escapeRe(value);
154 value = '^' + escapeRe(value);
155 if (exactMatch === true) {
159 value = new RegExp(value, caseSensitive ? '' : 'i');