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18 <pre class="prettyprint lang-js"><span id='Ext-util-Filter'>/**
19 </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 Ext.define('Ext.util.Filter', {
56 /* Begin Definitions */
59 <span id='Ext-util-Filter-cfg-property'> /**
60 </span> * @cfg {String} property The property to filter on. Required unless a {@link #filterFn} is passed
63 <span id='Ext-util-Filter-cfg-filterFn'> /**
64 </span> * @cfg {Function} filterFn A custom filter function which is passed each item in the {@link Ext.util.MixedCollection}
65 * in turn. Should return true to accept each item or false to reject it
68 <span id='Ext-util-Filter-cfg-anyMatch'> /**
69 </span> * @cfg {Boolean} anyMatch True to allow any match - no regex start/end line anchors will be added. Defaults to false
73 <span id='Ext-util-Filter-cfg-exactMatch'> /**
74 </span> * @cfg {Boolean} exactMatch True to force exact match (^ and $ characters added to the regex). Defaults to false.
75 * Ignored if anyMatch is true.
79 <span id='Ext-util-Filter-cfg-caseSensitive'> /**
80 </span> * @cfg {Boolean} caseSensitive True to make the regex case sensitive (adds 'i' switch to regex). Defaults to false.
84 <span id='Ext-util-Filter-cfg-root'> /**
85 </span> * @cfg {String} root Optional root property. This is mostly useful when filtering a Store, in which case we set the
86 * root to 'data' to make the filter pull the {@link #property} out of the data object of each item
89 <span id='Ext-util-Filter-method-constructor'> /**
90 </span> * Creates new Filter.
91 * @param {Object} config (optional) Config object
93 constructor: function(config) {
94 Ext.apply(this, config);
96 //we're aliasing filter to filterFn mostly for API cleanliness reasons, despite the fact it dirties the code here.
97 //Ext.util.Sorter takes a sorterFn property but allows .sort to be called - we do the same here
98 this.filter = this.filter || this.filterFn;
100 if (this.filter == undefined) {
101 if (this.property == undefined || this.value == undefined) {
102 // Commented this out temporarily because it stops us using string ids in models. TODO: Remove this once
103 // Model has been updated to allow string ids
105 // Ext.Error.raise("A Filter requires either a property or a filterFn to be set");
107 this.filter = this.createFilterFn();
110 this.filterFn = this.filter;
114 <span id='Ext-util-Filter-method-createFilterFn'> /**
116 * Creates a filter function for the configured property/value/anyMatch/caseSensitive options for this Filter
118 createFilterFn: function() {
120 matcher = me.createValueMatcher(),
121 property = me.property;
123 return function(item) {
124 return matcher.test(me.getRoot.call(me, item)[property]);
128 <span id='Ext-util-Filter-method-getRoot'> /**
130 * Returns the root property of the given item, based on the configured {@link #root} property
131 * @param {Object} item The item
132 * @return {Object} The root property of the object
134 getRoot: function(item) {
135 return this.root == undefined ? item : item[this.root];
138 <span id='Ext-util-Filter-method-createValueMatcher'> /**
140 * Returns a regular expression based on the given value and matching options
142 createValueMatcher : function() {
145 anyMatch = me.anyMatch,
146 exactMatch = me.exactMatch,
147 caseSensitive = me.caseSensitive,
148 escapeRe = Ext.String.escapeRegex;
150 if (!value.exec) { // not a regex
151 value = String(value);
153 if (anyMatch === true) {
154 value = escapeRe(value);
156 value = '^' + escapeRe(value);
157 if (exactMatch === true) {
161 value = new RegExp(value, caseSensitive ? '' : 'i');