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  <pre class="prettyprint lang-js"><span id='Ext-String'>/**
</span> * @class Ext.String
 *
 * A collection of useful static methods to deal with strings
 * @singleton
 */

Ext.String = (function() {
    var trimRegex     = /^[\x09\x0a\x0b\x0c\x0d\x20\xa0\u1680\u180e\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u2028\u2029\u202f\u205f\u3000]+|[\x09\x0a\x0b\x0c\x0d\x20\xa0\u1680\u180e\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u2028\u2029\u202f\u205f\u3000]+$/g,
        escapeRe      = /('|\\)/g,
        formatRe      = /\{(\d+)\}/g,
        escapeRegexRe = /([-.*+?\^${}()|\[\]\/\\])/g,
        basicTrimRe   = /^\s+|\s+$/g,
        whitespaceRe  = /\s+/,
        varReplace    = /(^[^a-z]*|[^\w])/gi,
        charToEntity,
        entityToChar,
        charToEntityRegex,
        entityToCharRegex,
        htmlEncodeReplaceFn = function(match, capture) {
            return charToEntity[capture];
        },
        htmlDecodeReplaceFn = function(match, capture) {
            return (capture in entityToChar) ? entityToChar[capture] : String.fromCharCode(parseInt(capture.substr(2), 10));
        };

    return {

<span id='Ext-String-method-createVarName'>        /**
</span>         * Converts a string of characters into a legal, parseable Javascript `var` name as long as the passed
         * string contains at least one alphabetic character. Non alphanumeric characters, and *leading* non alphabetic
         * characters will be removed.
         * @param {String} s A string to be converted into a `var` name.
         * @return {String} A legal Javascript `var` name.
         */
        createVarName: function(s) {
            return s.replace(varReplace, '');
        },

<span id='Ext-String-method-htmlEncode'>        /**
</span>         * Convert certain characters (&amp;, &lt;, &gt;, ', and &quot;) to their HTML character equivalents for literal display in web pages.
         * @param {String} value The string to encode
         * @return {String} The encoded text
         * @method
         */
        htmlEncode: function(value) {
            return (!value) ? value : String(value).replace(charToEntityRegex, htmlEncodeReplaceFn);
        },

<span id='Ext-String-method-htmlDecode'>        /**
</span>         * Convert certain characters (&amp;, &lt;, &gt;, ', and &quot;) from their HTML character equivalents.
         * @param {String} value The string to decode
         * @return {String} The decoded text
         * @method
         */
        htmlDecode: function(value) {
            return (!value) ? value : String(value).replace(entityToCharRegex, htmlDecodeReplaceFn);
        },

<span id='Ext-String-method-addCharacterEntities'>        /**
</span>         * Adds a set of character entity definitions to the set used by
         * {@link Ext.String#htmlEncode} and {@link Ext.String#htmlDecode}.
         *
         * This object should be keyed by the entity name sequence,
         * with the value being the textual representation of the entity.
         *
         *      Ext.String.addCharacterEntities({
         *          '&amp;amp;Uuml;':'Ü',
         *          '&amp;amp;ccedil;':'ç',
         *          '&amp;amp;ntilde;':'ñ',
         *          '&amp;amp;egrave;':'è'
         *      });
         *      var s = Ext.String.htmlEncode(&quot;A string with entities: èÜçñ&quot;);
         *
         * Note: the values of the character entites defined on this object are expected
         * to be single character values.  As such, the actual values represented by the
         * characters are sensitive to the character encoding of the javascript source
         * file when defined in string literal form. Script tasgs referencing server
         * resources with character entities must ensure that the 'charset' attribute
         * of the script node is consistent with the actual character encoding of the
         * server resource.
         *
         * The set of character entities may be reset back to the default state by using
         * the {@link Ext.String#resetCharacterEntities} method
         *
         * @param {Object} entities The set of character entities to add to the current
         * definitions.
         */
        addCharacterEntities: function(newEntities) {
            var charKeys = [],
                entityKeys = [],
                key, echar;
            for (key in newEntities) {
                echar = newEntities[key];
                entityToChar[key] = echar;
                charToEntity[echar] = key;
                charKeys.push(echar);
                entityKeys.push(key);
            }
            charToEntityRegex = new RegExp('(' + charKeys.join('|') + ')', 'g');
            entityToCharRegex = new RegExp('(' + entityKeys.join('|') + '|&amp;#[0-9]{1,5};' + ')', 'g');
        },

<span id='Ext-String-method-resetCharacterEntities'>        /**
</span>         * Resets the set of character entity definitions used by
         * {@link Ext.String#htmlEncode} and {@link Ext.String#htmlDecode} back to the
         * default state.
         */
        resetCharacterEntities: function() {
            charToEntity = {};
            entityToChar = {};
            // add the default set
            this.addCharacterEntities({
                '&amp;amp;'     :   '&amp;',
                '&amp;gt;'      :   '&gt;',
                '&amp;lt;'      :   '&lt;',
                '&amp;quot;'    :   '&quot;',
                '&amp;#39;'     :   &quot;'&quot;
            });
        },

<span id='Ext-String-method-urlAppend'>        /**
</span>         * Appends content to the query string of a URL, handling logic for whether to place
         * a question mark or ampersand.
         * @param {String} url The URL to append to.
         * @param {String} string The content to append to the URL.
         * @return {String} The resulting URL
         */
        urlAppend : function(url, string) {
            if (!Ext.isEmpty(string)) {
                return url + (url.indexOf('?') === -1 ? '?' : '&amp;') + string;
            }

            return url;
        },

<span id='Ext-String-method-trim'>        /**
</span>         * Trims whitespace from either end of a string, leaving spaces within the string intact.  Example:
         * @example
    var s = '  foo bar  ';
    alert('-' + s + '-');         //alerts &quot;- foo bar -&quot;
    alert('-' + Ext.String.trim(s) + '-');  //alerts &quot;-foo bar-&quot;

         * @param {String} string The string to escape
         * @return {String} The trimmed string
         */
        trim: function(string) {
            return string.replace(trimRegex, &quot;&quot;);
        },

<span id='Ext-String-method-capitalize'>        /**
</span>         * Capitalize the given string
         * @param {String} string
         * @return {String}
         */
        capitalize: function(string) {
            return string.charAt(0).toUpperCase() + string.substr(1);
        },

<span id='Ext-String-method-uncapitalize'>        /**
</span>         * Uncapitalize the given string
         * @param {String} string
         * @return {String}
         */
        uncapitalize: function(string) {
            return string.charAt(0).toLowerCase() + string.substr(1);
        },

<span id='Ext-String-method-ellipsis'>        /**
</span>         * Truncate a string and add an ellipsis ('...') to the end if it exceeds the specified length
         * @param {String} value The string to truncate
         * @param {Number} length The maximum length to allow before truncating
         * @param {Boolean} word True to try to find a common word break
         * @return {String} The converted text
         */
        ellipsis: function(value, len, word) {
            if (value &amp;&amp; value.length &gt; len) {
                if (word) {
                    var vs = value.substr(0, len - 2),
                    index = Math.max(vs.lastIndexOf(' '), vs.lastIndexOf('.'), vs.lastIndexOf('!'), vs.lastIndexOf('?'));
                    if (index !== -1 &amp;&amp; index &gt;= (len - 15)) {
                        return vs.substr(0, index) + &quot;...&quot;;
                    }
                }
                return value.substr(0, len - 3) + &quot;...&quot;;
            }
            return value;
        },

<span id='Ext-String-method-escapeRegex'>        /**
</span>         * Escapes the passed string for use in a regular expression
         * @param {String} string
         * @return {String}
         */
        escapeRegex: function(string) {
            return string.replace(escapeRegexRe, &quot;\\$1&quot;);
        },

<span id='Ext-String-method-escape'>        /**
</span>         * Escapes the passed string for ' and \
         * @param {String} string The string to escape
         * @return {String} The escaped string
         */
        escape: function(string) {
            return string.replace(escapeRe, &quot;\\$1&quot;);
        },

<span id='Ext-String-method-toggle'>        /**
</span>         * Utility function that allows you to easily switch a string between two alternating values.  The passed value
         * is compared to the current string, and if they are equal, the other value that was passed in is returned.  If
         * they are already different, the first value passed in is returned.  Note that this method returns the new value
         * but does not change the current string.
         * &lt;pre&gt;&lt;code&gt;
        // alternate sort directions
        sort = Ext.String.toggle(sort, 'ASC', 'DESC');

        // instead of conditional logic:
        sort = (sort == 'ASC' ? 'DESC' : 'ASC');
           &lt;/code&gt;&lt;/pre&gt;
         * @param {String} string The current string
         * @param {String} value The value to compare to the current string
         * @param {String} other The new value to use if the string already equals the first value passed in
         * @return {String} The new value
         */
        toggle: function(string, value, other) {
            return string === value ? other : value;
        },

<span id='Ext-String-method-leftPad'>        /**
</span>         * Pads the left side of a string with a specified character.  This is especially useful
         * for normalizing number and date strings.  Example usage:
         *
         * &lt;pre&gt;&lt;code&gt;
    var s = Ext.String.leftPad('123', 5, '0');
    // s now contains the string: '00123'
           &lt;/code&gt;&lt;/pre&gt;
         * @param {String} string The original string
         * @param {Number} size The total length of the output string
         * @param {String} character (optional) The character with which to pad the original string (defaults to empty string &quot; &quot;)
         * @return {String} The padded string
         */
        leftPad: function(string, size, character) {
            var result = String(string);
            character = character || &quot; &quot;;
            while (result.length &lt; size) {
                result = character + result;
            }
            return result;
        },

<span id='Ext-String-method-format'>        /**
</span>         * Allows you to define a tokenized string and pass an arbitrary number of arguments to replace the tokens.  Each
         * token must be unique, and must increment in the format {0}, {1}, etc.  Example usage:
         * &lt;pre&gt;&lt;code&gt;
    var cls = 'my-class', text = 'Some text';
    var s = Ext.String.format('&amp;lt;div class=&quot;{0}&quot;&gt;{1}&amp;lt;/div&gt;', cls, text);
    // s now contains the string: '&amp;lt;div class=&quot;my-class&quot;&gt;Some text&amp;lt;/div&gt;'
           &lt;/code&gt;&lt;/pre&gt;
         * @param {String} string The tokenized string to be formatted
         * @param {String} value1 The value to replace token {0}
         * @param {String} value2 Etc...
         * @return {String} The formatted string
         */
        format: function(format) {
            var args = Ext.Array.toArray(arguments, 1);
            return format.replace(formatRe, function(m, i) {
                return args[i];
            });
        },

<span id='Ext-String-method-repeat'>        /**
</span>         * Returns a string with a specified number of repititions a given string pattern.
         * The pattern be separated by a different string.
         *
         *      var s = Ext.String.repeat('---', 4); // = '------------'
         *      var t = Ext.String.repeat('--', 3, '/'); // = '--/--/--'
         *
         * @param {String} pattern The pattern to repeat.
         * @param {Number} count The number of times to repeat the pattern (may be 0).
         * @param {String} sep An option string to separate each pattern.
         */
        repeat: function(pattern, count, sep) {
            for (var buf = [], i = count; i--; ) {
                buf.push(pattern);
            }
            return buf.join(sep || '');
        },

<span id='Ext-String-method-splitWords'>        /**
</span>         * Splits a string of space separated words into an array, trimming as needed. If the
         * words are already an array, it is returned.
         *
         * @param {String/Array} words
         */
        splitWords: function (words) {
            if (words &amp;&amp; typeof words == 'string') {
                return words.replace(basicTrimRe, '').split(whitespaceRe);
            }
            return words || [];
        }
    };
}());

// initialize the default encode / decode entities
Ext.String.resetCharacterEntities();

<span id='Ext-method-htmlEncode'>/**
</span> * Old alias to {@link Ext.String#htmlEncode}
 * @deprecated Use {@link Ext.String#htmlEncode} instead
 * @method
 * @member Ext
 * @inheritdoc Ext.String#htmlEncode
 */
Ext.htmlEncode = Ext.String.htmlEncode;


<span id='Ext-method-htmlDecode'>/**
</span> * Old alias to {@link Ext.String#htmlDecode}
 * @deprecated Use {@link Ext.String#htmlDecode} instead
 * @method
 * @member Ext
 * @inheritdoc Ext.String#htmlDecode
 */
Ext.htmlDecode = Ext.String.htmlDecode;

<span id='Ext-method-urlAppend'>/**
</span> * Old alias to {@link Ext.String#urlAppend}
 * @deprecated Use {@link Ext.String#urlAppend} instead
 * @method
 * @member Ext
 * @inheritdoc Ext.String#urlAppend
 */
Ext.urlAppend = Ext.String.urlAppend;</pre>
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