src/cm/media/js/lib/yui/yui3.0.0/build/console/console.js
changeset 0 40c8f766c9b8
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cm/media/js/lib/yui/yui3.0.0/build/console/console.js	Mon Nov 23 15:14:29 2009 +0100
@@ -0,0 +1,1478 @@
+/*
+Copyright (c) 2009, Yahoo! Inc. All rights reserved.
+Code licensed under the BSD License:
+http://developer.yahoo.net/yui/license.txt
+version: 3.0.0
+build: 1549
+*/
+YUI.add('console', function(Y) {
+
+/**
+ * Console creates a visualization for messages logged through calls to a YUI
+ * instance's <code>Y.log( message, category, source )</code> method.  The
+ * debug versions of YUI modules will include logging statements to offer some
+ * insight into the steps executed during that module's operation.  Including
+ * log statements in your code will cause those messages to also appear in the
+ * Console.  Use Console to aid in developing your page or application.
+ *
+ * Entry categories &quot;info&quot;, &quot;warn&quot;, and &quot;error&quot;
+ * are also referred to as the log level, and entries are filtered against the
+ * configured logLevel.
+ *
+ * @module console
+ * @class Console
+ * @extends Widget
+ * @param conf {Object} Configuration object (see Configuration attributes)
+ * @constructor
+ */
+function Console() {
+    Console.superclass.constructor.apply(this,arguments);
+}
+
+var getCN = Y.ClassNameManager.getClassName,
+    CHECKED        = 'checked',
+    CLEAR          = 'clear',
+    CLICK          = 'click',
+    COLLAPSED      = 'collapsed',
+    CONSOLE        = 'console',
+    CONTENT_BOX    = 'contentBox',
+    DISABLED       = 'disabled',
+    ENTRY          = 'entry',
+    ERROR          = 'error',
+    HEIGHT         = 'height',
+    INFO           = 'info',
+    INNER_HTML     = 'innerHTML',
+    LAST_TIME      = 'lastTime',
+    PAUSE          = 'pause',
+    PAUSED         = 'paused',
+    RESET          = 'reset',
+    START_TIME     = 'startTime',
+    TITLE          = 'title',
+    WARN           = 'warn',
+
+    DOT = '.',
+
+    C_BUTTON           = getCN(CONSOLE,'button'),
+    C_CHECKBOX         = getCN(CONSOLE,'checkbox'),
+    C_CLEAR            = getCN(CONSOLE,CLEAR),
+    C_COLLAPSE         = getCN(CONSOLE,'collapse'),
+    C_COLLAPSED        = getCN(CONSOLE,COLLAPSED),
+    C_CONSOLE_CONTROLS = getCN(CONSOLE,'controls'),
+    C_CONSOLE_HD       = getCN(CONSOLE,'hd'),
+    C_CONSOLE_BD       = getCN(CONSOLE,'bd'),
+    C_CONSOLE_FT       = getCN(CONSOLE,'ft'),
+    C_CONSOLE_TITLE    = getCN(CONSOLE,TITLE),
+    C_ENTRY            = getCN(CONSOLE,ENTRY),
+    C_ENTRY_CAT        = getCN(CONSOLE,ENTRY,'cat'),
+    C_ENTRY_CONTENT    = getCN(CONSOLE,ENTRY,'content'),
+    C_ENTRY_META       = getCN(CONSOLE,ENTRY,'meta'),
+    C_ENTRY_SRC        = getCN(CONSOLE,ENTRY,'src'),
+    C_ENTRY_TIME       = getCN(CONSOLE,ENTRY,'time'),
+    C_PAUSE            = getCN(CONSOLE,PAUSE),
+    C_PAUSE_LABEL      = getCN(CONSOLE,PAUSE,'label'),
+
+    RE_INLINE_SOURCE = /^(\S+)\s/,
+    RE_AMP = /&/g,
+    RE_GT  = />/g,
+    RE_LT  = /</g,
+
+    ESC_AMP = '&#38;',
+    ESC_GT  = '&#62;',
+    ESC_LT  = '&#60;',
+    
+    ENTRY_TEMPLATE_STR =
+        '<div class="{entry_class} {cat_class} {src_class}">'+
+            '<p class="{entry_meta_class}">'+
+                '<span class="{entry_src_class}">'+
+                    '{sourceAndDetail}'+
+                '</span>'+
+                '<span class="{entry_cat_class}">'+
+                    '{category}</span>'+
+                '<span class="{entry_time_class}">'+
+                    ' {totalTime}ms (+{elapsedTime}) {localTime}'+
+                '</span>'+
+            '</p>'+
+            '<pre class="{entry_content_class}">{message}</pre>'+
+        '</div>',
+
+    L = Y.Lang,
+    create     = Y.Node.create,
+    isNumber   = L.isNumber,
+    isString   = L.isString,
+    merge      = Y.merge,
+    substitute = Y.substitute;
+    
+
+Y.mix(Console, {
+
+    /**
+     * The identity of the widget.
+     *
+     * @property Console.NAME
+     * @type String
+     * @static
+     */
+    NAME : CONSOLE,
+
+    /**
+     * Static identifier for logLevel configuration setting to allow all
+     * incoming messages to generate Console entries.
+     *
+     * @property Console.LOG_LEVEL_INFO
+     * @type String
+     * @static
+     */
+    LOG_LEVEL_INFO  : INFO,
+
+    /**
+     * Static identifier for logLevel configuration setting to allow only
+     * incoming messages of logLevel &quot;warn&quot; or &quot;error&quot;
+     * to generate Console entries.
+     *
+     * @property Console.LOG_LEVEL_WARN
+     * @type String
+     * @static
+     */
+    LOG_LEVEL_WARN  : WARN,
+
+    /**
+     * Static identifier for logLevel configuration setting to allow only
+     * incoming messages of logLevel &quot;error&quot; to generate
+     * Console entries.
+     *
+     * @property Console.LOG_LEVEL_ERROR
+     * @type String
+     * @static
+     */
+    LOG_LEVEL_ERROR : ERROR,
+
+    /**
+     * Map (object) of classNames used to populate the placeholders in the
+     * Console.ENTRY_TEMPLATE markup when rendering a new Console entry.
+     *
+     * <p>By default, the keys contained in the object are:</p>
+     * <ul>
+     *    <li>entry_class</li>
+     *    <li>entry_meta_class</li>
+     *    <li>entry_cat_class</li>
+     *    <li>entry_src_class</li>
+     *    <li>entry_time_class</li>
+     *    <li>entry_content_class</li>
+     * </ul>
+     *
+     * @property Console.ENTRY_CLASSES
+     * @type Object
+     * @static
+     */
+    ENTRY_CLASSES   : {
+        entry_class         : C_ENTRY,
+        entry_meta_class    : C_ENTRY_META,
+        entry_cat_class     : C_ENTRY_CAT,
+        entry_src_class     : C_ENTRY_SRC,
+        entry_time_class    : C_ENTRY_TIME,
+        entry_content_class : C_ENTRY_CONTENT
+    },
+
+    /**
+     * Map (object) of classNames used to populate the placeholders in the
+     * Console.HEADER_TEMPLATE, Console.BODY_TEMPLATE, and
+     * Console.FOOTER_TEMPLATE markup when rendering the Console UI.
+     *
+     * <p>By default, the keys contained in the object are:</p>
+     * <ul>
+     *   <li>console_hd_class</li>
+     *   <li>console_bd_class</li>
+     *   <li>console_ft_class</li>
+     *   <li>console_controls_class</li>
+     *   <li>console_checkbox_class</li>
+     *   <li>console_pause_class</li>
+     *   <li>console_pause_label_class</li>
+     *   <li>console_button_class</li>
+     *   <li>console_clear_class</li>
+     *   <li>console_collapse_class</li>
+     *   <li>console_title_class</li>
+     * </ul>
+     *
+     * @property Console.CHROME_CLASSES
+     * @type Object
+     * @static
+     */
+    CHROME_CLASSES  : {
+        console_hd_class       : C_CONSOLE_HD,
+        console_bd_class       : C_CONSOLE_BD,
+        console_ft_class       : C_CONSOLE_FT,
+        console_controls_class : C_CONSOLE_CONTROLS,
+        console_checkbox_class : C_CHECKBOX,
+        console_pause_class    : C_PAUSE,
+        console_pause_label_class : C_PAUSE_LABEL,
+        console_button_class   : C_BUTTON,
+        console_clear_class    : C_CLEAR,
+        console_collapse_class : C_COLLAPSE,
+        console_title_class    : C_CONSOLE_TITLE
+    },
+
+    /**
+     * Markup template used to generate the DOM structure for the header
+     * section of the Console when it is rendered.  The template includes
+     * these {placeholder}s:
+     *
+     * <ul>
+     *   <li>console_button_class - contributed by Console.CHROME_CLASSES</li>
+     *   <li>console_collapse_class - contributed by Console.CHROME_CLASSES</li>
+     *   <li>console_hd_class - contributed by Console.CHROME_CLASSES</li>
+     *   <li>console_title_class - contributed by Console.CHROME_CLASSES</li>
+     *   <li>str_collapse - pulled from attribute strings.collapse</li>
+     *   <li>str_title - pulled from attribute strings.title</li>
+     * </ul>
+     *
+     * @property Console.HEADER_TEMPLATE
+     * @type String
+     * @static
+     */
+    HEADER_TEMPLATE :
+        '<div class="{console_hd_class}">'+
+            '<h4 class="{console_title_class}">{str_title}</h4>'+
+            '<button type="button" class="'+
+                '{console_button_class} {console_collapse_class}">{str_collapse}'+
+            '</button>'+
+        '</div>',
+
+    /**
+     * Markup template used to generate the DOM structure for the Console body
+     * (where the messages are inserted) when it is rendered.  The template
+     * includes only the {placeholder} &quot;console_bd_class&quot;, which is
+     * constributed by Console.CHROME_CLASSES.
+     *
+     * @property Console.BODY_TEMPLATE
+     * @type String
+     * @static
+     */
+    BODY_TEMPLATE : '<div class="{console_bd_class}"></div>',
+
+    /**
+     * Markup template used to generate the DOM structure for the footer
+     * section of the Console when it is rendered.  The template includes
+     * many of the {placeholder}s from Console.CHROME_CLASSES as well as:
+     *
+     * <ul>
+     *   <li>id_guid - generated unique id, relates the label and checkbox</li>
+     *   <li>str_pause - pulled from attribute strings.pause</li>
+     *   <li>str_clear - pulled from attribute strings.clear</li>
+     * </ul>
+     *
+     * @property Console.FOOTER_TEMPLATE
+     * @type String
+     * @static
+     */
+    FOOTER_TEMPLATE :
+        '<div class="{console_ft_class}">'+
+            '<div class="{console_controls_class}">'+
+                '<label for="{id_guid}" class="{console_pause_label_class}">'+
+                    '<input type="checkbox" class="{console_checkbox_class} '+
+                        '{console_pause_class}" value="1" id="{id_guid}"> '+
+                    '{str_pause}</label>' +
+                '<button type="button" class="'+
+                    '{console_button_class} {console_clear_class}">{str_clear}'+
+                '</button>'+
+            '</div>'+
+        '</div>',
+
+    /**
+     * Default markup template used to create the DOM structure for Console
+     * entries. The markup contains {placeholder}s for content and classes
+     * that are replaced via Y.substitute.  The default template contains
+     * the {placeholder}s identified in Console.ENTRY_CLASSES as well as the
+     * following placeholders that will be populated by the log entry data:
+     *
+     * <ul>
+     *   <li>cat_class</li>
+     *   <li>src_class</li>
+     *   <li>totalTime</li>
+     *   <li>elapsedTime</li>
+     *   <li>localTime</li>
+     *   <li>sourceAndDetail</li>
+     *   <li>message</li>
+     * </ul>
+     *
+     * @property Console.ENTRY_TEMPLATE
+     * @type String
+     * @static
+     */
+    ENTRY_TEMPLATE : ENTRY_TEMPLATE_STR,
+
+    /**
+     * Static property used to define the default attribute configuration of
+     * the Widget.
+     *
+     * @property Console.ATTRS
+     * @Type Object
+     * @static
+     */
+    ATTRS : {
+
+        /**
+         * Name of the custom event that will communicate log messages.
+         *
+         * @attribute logEvent
+         * @type String
+         * @default "yui:log"
+         */
+        logEvent : {
+            value : 'yui:log',
+            writeOnce : true,
+            validator : isString
+        },
+
+        /**
+         * Object that will emit the log events.  By default the YUI instance.
+         * To have a single Console capture events from all YUI instances, set
+         * this to the Y.Global object.
+         *
+         * @attribute logSource
+         * @type EventTarget
+         * @default Y
+         */
+        logSource : {
+            value : Y,
+            writeOnce : true,
+            validator : function (v) {
+                return v && Y.Lang.isFunction(v.on);
+            }
+        },
+
+        /**
+         * Collection of strings used to label elements in the Console UI.
+         * Default collection contains the following name:value pairs:
+         *
+         * <ul>
+         *   <li>title : &quot;Log Console&quot;</li>
+         *   <li>pause : &quot;Pause&quot;</li>
+         *   <li>clear : &quot;Clear&quot;</li>
+         *   <li>collapse : &quot;Collapse&quot;</li>
+         *   <li>expand : &quot;Expand&quot;</li>
+         * </ul>
+         *
+         * @attribute strings
+         * @type Object
+         */
+        strings : {
+            value : {
+                title : "Log Console",
+                pause : "Pause",
+                clear : "Clear",
+                collapse : "Collapse",
+                expand   : "Expand"
+            }
+        },
+
+        /**
+         * Boolean to pause the outputting of new messages to the console.
+         * When paused, messages will accumulate in the buffer.
+         *
+         * @attribute paused
+         * @type boolean
+         * @default false
+         */
+        paused : {
+            value : false,
+            validator : L.isBoolean
+        },
+
+        /**
+         * If a category is not specified in the Y.log(..) statement, this
+         * category will be used. Categories &quot;info&quot;,
+         * &quot;warn&quot;, and &quot;error&quot; are also called log level.
+         *
+         * @attribute defaultCategory
+         * @type String
+         * @default "info"
+         */
+        defaultCategory : {
+            value : INFO,
+            validator : isString
+        },
+
+        /**
+         * If a source is not specified in the Y.log(..) statement, this
+         * source will be used.
+         *
+         * @attribute defaultSource
+         * @type String
+         * @default "global"
+         */
+        defaultSource   : {
+            value : 'global',
+            validator : isString
+        },
+
+        /**
+         * Markup template used to create the DOM structure for Console entries.
+         *
+         * @attribute entryTemplate
+         * @type String
+         * @default Console.ENTRY_TEMPLATE
+         */
+        entryTemplate : {
+            value : ENTRY_TEMPLATE_STR,
+            validator : isString
+        },
+
+        /**
+         * Minimum entry log level to render into the Console.  The initial
+         * logLevel value for all Console instances defaults from the
+         * Y.config.logLevel YUI configuration, or Console.LOG_LEVEL_INFO if
+         * that configuration is not set.
+         *
+         * Possible values are &quot;info&quot;, &quot;warn&quot;,
+         * &quot;error&quot; (case insensitive), or their corresponding statics
+         * Console.LOG_LEVEL_INFO and so on.
+         *
+         * @attribute logLevel
+         * @type String
+         * @default Y.config.logLevel or Console.LOG_LEVEL_INFO
+         */
+        logLevel : {
+            value : Y.config.logLevel || INFO,
+            setter : function (v) {
+                return this._setLogLevel(v);
+            }
+        },
+
+        /**
+         * Millisecond timeout between iterations of the print loop, moving
+         * entries from the buffer to the UI.
+         *
+         * @attribute printTimeout
+         * @type Number
+         * @default 100
+         */
+        printTimeout : {
+            value : 100,
+            validator : isNumber
+        },
+
+        /**
+         * Maximum number of entries printed in each iteration of the print
+         * loop. This is used to prevent excessive logging locking the page UI.
+         *
+         * @attribute printLimit
+         * @type Number
+         * @default 50
+         */
+        printLimit : {
+            value : 50,
+            validator : isNumber
+        },
+
+        /**
+         * Maximum number of Console entries allowed in the Console body at one
+         * time.  This is used to keep acquired messages from exploding the
+         * DOM tree and impacting page performance.
+         *
+         * @attribute consoleLimit
+         * @type Number
+         * @default 300
+         */
+        consoleLimit : {
+            value : 300,
+            validator : isNumber
+        },
+
+        /**
+         * New entries should display at the top of the Console or the bottom?
+         *
+         * @attribute newestOnTop
+         * @type Boolean
+         * @default true
+         */
+        newestOnTop : {
+            value : true
+        },
+
+        /**
+         * When new entries are added to the Console UI, should they be
+         * scrolled into view?
+         *
+         * @attribute scrollIntoView
+         * @type Boolean
+         * @default true
+         */
+        scrollIntoView : {
+            value : true
+        },
+
+        /**
+         * The baseline time for this Console instance, used to measure elapsed
+         * time from the moment the console module is <code>use</code>d to the
+         * moment each new entry is logged (not rendered).
+         *
+         * This value is reset by the instance method myConsole.reset().
+         *
+         * @attribute startTime
+         * @type Date
+         * @default The moment the console module is <code>use</code>d
+         */
+        startTime : {
+            value : new Date()
+        },
+
+        /**
+         * The precise time the last entry was logged.  Used to measure elapsed
+         * time between log messages.
+         *
+         * @attribute lastTime
+         * @type Date
+         * @default The moment the console module is <code>use</code>d
+         */
+        lastTime : {
+            value : new Date(),
+            readOnly: true
+        },
+
+        /**
+         * Controls the collapsed state of the Console
+         *
+         * @attribute collapsed
+         * @type Boolean
+         * @default false
+         */
+        collapsed : {
+            value : false
+        },
+
+        /**
+        * String with units, or number, representing the height of the Console,
+        * inclusive of header and footer. If a number is provided, the default
+        * unit, defined by Widget's DEF_UNIT, property is used.
+        *
+        * @attribute height
+        * @default "300px"
+        * @type {String | Number}
+        */
+        height: {
+            value: "300px"
+        },
+
+        /**
+        * String with units, or number, representing the width of the Console.
+        * If a number is provided, the default unit, defined by Widget's
+        * DEF_UNIT, property is used.
+        *
+        * @attribute width
+        * @default "300px"
+        * @type {String | Number}
+        */
+        width: {
+            value: "300px"
+        },
+
+        /**
+         * Pass through to the YUI instance useBrowserConsole configuration.
+         * By default this is set to false, which will disable logging to the
+         * browser console when a Console instance is created.  If the
+         * logSource is not a YUI instance, this has no effect.
+         * 
+         * @attribute useBrowserConsole
+         * @type {Boolean}
+         * @default false
+         */
+         useBrowserConsole : {
+            lazyAdd: false,
+            value: false,
+            getter : function () {
+                var logSource = this.get('logSource');
+                return logSource instanceof YUI ?
+                    logSource.config.useBrowserConsole : null;
+            },
+            setter : function (v) {
+                var logSource = this.get('logSource');
+                if (logSource instanceof YUI) {
+                    v = !!v;
+                    logSource.config.useBrowserConsole = !!v;
+                    return v;
+                } else {
+                    return Y.Attribute.INVALID_VALUE;
+                }
+            }
+         },
+
+         /**
+          * Allows the Console to flow in the document.  Available values are
+          * 'inline', 'block', and 'separate' (the default).  
+          *
+          * @attribute style
+          * @type {String}
+          * @default 'separate'
+          */
+         style : {
+            value : 'separate',
+            writeOnce : true,
+            validator : function (v) {
+                return this._validateStyle(v);
+            }
+         }
+    }
+
+});
+
+Y.extend(Console,Y.Widget,{
+
+    /**
+     * Category to prefix all event subscriptions to allow for ease of detach
+     * during destroy.
+     *
+     * @property _evtCat
+     * @type string
+     * @protected
+     */
+    _evtCat : null,
+
+    /**
+     * Reference to the Node instance containing the header contents.
+     *
+     * @property _head
+     * @type Node
+     * @default null
+     * @protected
+     */
+    _head    : null,
+
+    /**
+     * Reference to the Node instance that will house the console messages.
+     *
+     * @property _body
+     * @type Node
+     * @default null
+     * @protected
+     */
+    _body    : null,
+
+    /**
+     * Reference to the Node instance containing the footer contents.
+     *
+     * @property _foot
+     * @type Node
+     * @default null
+     * @protected
+     */
+    _foot    : null,
+
+    /**
+     * Holds the object API returned from <code>Y.later</code> for the print
+     * loop interval.
+     *
+     * @property _printLoop
+     * @type Object
+     * @default null
+     * @protected
+     */
+    _printLoop : null,
+
+    /**
+     * Array of normalized message objects awaiting printing.
+     *
+     * @property buffer
+     * @type Array
+     * @default null
+     * @protected
+     */
+    buffer   : null,
+
+    /**
+     * Wrapper for <code>Y.log</code>.
+     *
+     * @method log
+     * @param arg* {MIXED} (all arguments passed through to <code>Y.log</code>)
+     * @chainable
+     */
+    log : function () {
+        Y.log.apply(Y,arguments);
+
+        return this;
+    },
+
+    /**
+     * Clear the console of messages and flush the buffer of pending messages.
+     *
+     * @method clearConsole
+     * @chainable
+     */
+    clearConsole : function () {
+        // TODO: clear event listeners from console contents
+        this._body.set(INNER_HTML,'');
+
+        this._cancelPrintLoop();
+
+        this.buffer = [];
+
+        return this;
+    },
+
+    /**
+     * Clears the console and resets internal timers.
+     *
+     * @method reset
+     * @chainable
+     */
+    reset : function () {
+        this.fire(RESET);
+        
+        return this;
+    },
+
+    /**
+     * Collapses the body and footer.
+     *
+     * @method collapse
+     * @chainable
+     */
+    collapse : function () {
+        this.set(COLLAPSED, true);
+
+        return this;
+    },
+
+    /**
+     * Expands the body and footer if collapsed.
+     *
+     * @method expand
+     * @chainable
+     */
+    expand : function () {
+        this.set(COLLAPSED, false);
+
+        return this;
+    },
+
+    /**
+     * Outputs buffered messages to the console UI.  This is typically called
+     * from a scheduled interval until the buffer is empty (referred to as the
+     * print loop).  The number of buffered messages output to the Console is
+     * limited to the number provided as an argument.  If no limit is passed,
+     * all buffered messages are rendered.
+     * 
+     * @method printBuffer
+     * @param limit {Number} (optional) max number of buffered entries to write
+     * @chainable
+     */
+    printBuffer: function (limit) {
+        var messages    = this.buffer,
+            debug       = Y.config.debug,
+            entries     = [],
+            consoleLimit= this.get('consoleLimit'),
+            newestOnTop = this.get('newestOnTop'),
+            anchor      = newestOnTop ? this._body.get('firstChild') : null,
+            i;
+
+        if (messages.length > consoleLimit) {
+            messages.splice(0, messages.length - consoleLimit);
+        }
+
+        limit = Math.min(messages.length, (limit || messages.length));
+        
+        // turn off logging system
+        Y.config.debug = false;
+
+        if (!this.get(PAUSED) && this.get('rendered')) {
+
+            for (i = 0; i < limit && messages.length; ++i) {
+                entries[i] = this._createEntryHTML(messages.shift());
+            }
+
+            if (!messages.length) {
+                this._cancelPrintLoop();
+            }
+
+            if (entries.length) {
+                if (newestOnTop) {
+                    entries.reverse();
+                }
+
+                this._body.insertBefore(create(entries.join('')), anchor);
+
+                if (this.get('scrollIntoView')) {
+                    this.scrollToLatest();
+                }
+
+                this._trimOldEntries();
+            }
+        }
+
+        // restore logging system
+        Y.config.debug = debug;
+
+        return this;
+    },
+
+    
+    /**
+     * Constructor code.  Set up the buffer and entry template, publish
+     * internal events, and subscribe to the configured logEvent.
+     * 
+     * @method initializer
+     * @protected
+     */
+    initializer : function () {
+        this._evtCat = Y.stamp(this) + '|';
+
+        this.buffer = [];
+
+        this.get('logSource').on(this._evtCat +
+            this.get('logEvent'),Y.bind("_onLogEvent",this));
+
+        /**
+         * Transfers a received message to the print loop buffer.  Default
+         * behavior defined in _defEntryFn.
+         *
+         * @event entry
+         * @param event {Event.Facade} An Event Facade object with the following attribute specific properties added:
+         *  <dl>
+         *      <dt>message</dt>
+         *          <dd>The message data normalized into an object literal (see _normalizeMessage)</dd>
+         *  </dl>
+         * @preventable _defEntryFn
+         */
+        this.publish(ENTRY, { defaultFn: this._defEntryFn });
+
+        /**
+         * Triggers the reset behavior via the default logic in _defResetFn.
+         *
+         * @event reset
+         * @param event {Event.Facade} Event Facade object
+         * @preventable _defResetFn
+         */
+        this.publish(RESET, { defaultFn: this._defResetFn });
+
+        this.after('rendered', this._schedulePrint);
+    },
+
+    /**
+     * Tears down the instance, flushing event subscriptions and purging the UI.
+     *
+     * @method destructor
+     * @protected
+     */
+    destructor : function () {
+        var bb = this.get('boundingBox');
+
+        this._cancelPrintLoop();
+
+        this.get('logSource').detach(this._evtCat + '*');
+        
+        Y.Event.purgeElement(bb, true);
+
+        bb.set('innerHTML','');
+    },
+
+    /**
+     * Generate the Console UI.
+     *
+     * @method renderUI
+     * @protected
+     */
+    renderUI : function () {
+        this._initHead();
+        this._initBody();
+        this._initFoot();
+
+        // Apply positioning to the bounding box if appropriate
+        var style = this.get('style');
+        if (style !== 'block') {
+            this.get('boundingBox').addClass('yui-'+style+'-console');
+        }
+    },
+
+    /**
+     * Sync the UI state to the current attribute state.
+     *
+     * @method syncUI
+     */
+    syncUI : function () {
+        this._uiUpdatePaused(this.get(PAUSED));
+        this._uiUpdateCollapsed(this.get(COLLAPSED));
+        this._uiSetHeight(this.get(HEIGHT));
+    },
+
+    /**
+     * Set up event listeners to wire up the UI to the internal state.
+     *
+     * @method bindUI
+     * @protected
+     */
+    bindUI : function () {
+        this.get(CONTENT_BOX).query('button.'+C_COLLAPSE).
+            on(CLICK,this._onCollapseClick,this);
+
+        this.get(CONTENT_BOX).query('input[type=checkbox].'+C_PAUSE).
+            on(CLICK,this._onPauseClick,this);
+
+        this.get(CONTENT_BOX).query('button.'+C_CLEAR).
+            on(CLICK,this._onClearClick,this);
+        
+        // Attribute changes
+        this.after(this._evtCat + 'stringsChange',
+            this._afterStringsChange);
+        this.after(this._evtCat + 'pausedChange',
+            this._afterPausedChange);
+        this.after(this._evtCat + 'consoleLimitChange',
+            this._afterConsoleLimitChange);
+        this.after(this._evtCat + 'collapsedChange',
+            this._afterCollapsedChange);
+    },
+
+    
+    /**
+     * Create the DOM structure for the header elements.
+     *
+     * @method _initHead
+     * @protected
+     */
+    _initHead : function () {
+        var cb   = this.get(CONTENT_BOX),
+            info = merge(Console.CHROME_CLASSES, {
+                        str_collapse : this.get('strings.collapse'),
+                        str_title : this.get('strings.title')
+                    });
+
+        this._head = create(substitute(Console.HEADER_TEMPLATE,info));
+
+        cb.insertBefore(this._head,cb.get('firstChild'));
+    },
+
+    /**
+     * Create the DOM structure for the console body&#8212;where messages are
+     * rendered.
+     *
+     * @method _initBody
+     * @protected
+     */
+    _initBody : function () {
+        this._body = create(substitute(
+                            Console.BODY_TEMPLATE,
+                            Console.CHROME_CLASSES));
+
+        this.get(CONTENT_BOX).appendChild(this._body);
+    },
+
+    /**
+     * Create the DOM structure for the footer elements.
+     *
+     * @method _initFoot
+     * @protected
+     */
+    _initFoot : function () {
+        var info = merge(Console.CHROME_CLASSES, {
+                id_guid   : Y.guid(),
+                str_pause : this.get('strings.pause'),
+                str_clear : this.get('strings.clear')
+            });
+
+        this._foot = create(substitute(Console.FOOTER_TEMPLATE,info));
+
+        this.get(CONTENT_BOX).appendChild(this._foot);
+    },
+
+    /**
+     * Determine if incoming log messages are within the configured logLevel
+     * to be buffered for printing.
+     *
+     * @method _isInLogLevel
+     * @protected
+     */
+    _isInLogLevel : function (e) {
+        var cat = e.cat, lvl = this.get('logLevel');
+
+        if (lvl !== INFO) {
+            cat = cat || INFO;
+
+            if (isString(cat)) {
+                cat = cat.toLowerCase();
+            }
+
+            if ((cat === WARN && lvl === ERROR) ||
+                (cat === INFO && lvl !== INFO)) {
+                return false;
+            }
+        }
+
+        return true;
+    },
+
+    /**
+     * Create a log entry message from the inputs including the following keys:
+     * <ul>
+     *     <li>time - this moment</li>
+     *     <li>message - leg message</li>
+     *     <li>category - logLevel or custom category for the message</li>
+     *     <li>source - when provided, the widget or util calling Y.log</li>
+     *     <li>sourceAndDetail - same as source but can include instance info</li>
+     *     <li>localTime - readable version of time</li>
+     *     <li>elapsedTime - ms since last entry</li>
+     *     <li>totalTime - ms since Console was instantiated or reset</li>
+     * </ul>
+     *
+     * @method _normalizeMessage
+     * @param e {Event} custom event containing the log message
+     * @return Object the message object
+     * @protected
+     */
+    _normalizeMessage : function (e) {
+
+        var msg = e.msg,
+            cat = e.cat,
+            src = e.src,
+
+            m = {
+                time            : new Date(),
+                message         : msg,
+                category        : cat || this.get('defaultCategory'),
+                sourceAndDetail : src || this.get('defaultSource'),
+                source          : null,
+                localTime       : null,
+                elapsedTime     : null,
+                totalTime       : null
+            };
+
+        // Extract m.source "Foo" from m.sourceAndDetail "Foo bar baz"
+        m.source          = RE_INLINE_SOURCE.test(m.sourceAndDetail) ?
+                                RegExp.$1 : m.sourceAndDetail;
+        m.localTime       = m.time.toLocaleTimeString ? 
+                            m.time.toLocaleTimeString() : (m.time + '');
+        m.elapsedTime     = m.time - this.get(LAST_TIME);
+        m.totalTime       = m.time - this.get(START_TIME);
+
+        this._set(LAST_TIME,m.time);
+
+        return m;
+    },
+
+    /**
+     * Sets an interval for buffered messages to be output to the console.
+     *
+     * @method _schedulePrint
+     * @protected
+     */
+    _schedulePrint : function () {
+        if (!this._printLoop && !this.get(PAUSED) && this.get('rendered')) {
+            this._printLoop = Y.later(
+                                this.get('printTimeout'),
+                                this, this.printBuffer,
+                                this.get('printLimit'), true);
+        }
+    },
+
+    /**
+     * Translates message meta into the markup for a console entry.
+     *
+     * @method _createEntryHTML
+     * @param m {Object} object literal containing normalized message metadata
+     * @return String
+     * @protected
+     */
+    _createEntryHTML : function (m) {
+        m = merge(
+                this._htmlEscapeMessage(m),
+                Console.ENTRY_CLASSES,
+                {
+                    cat_class : this.getClassName(ENTRY,m.category),
+                    src_class : this.getClassName(ENTRY,m.source)
+                });
+
+        return this.get('entryTemplate').replace(/\{(\w+)\}/g,
+            function (_,token) {
+                return token in m ? m[token] : '';
+            });
+    },
+
+    /**
+     * Scrolls to the most recent entry
+     *
+     * @method scrollToLatest
+     * @chainable
+     */
+    scrollToLatest : function () {
+        var scrollTop = this.get('newestOnTop') ?
+                            0 :
+                            this._body.get('scrollHeight');
+
+        this._body.set('scrollTop', scrollTop);
+    },
+
+    /**
+     * Performs HTML escaping on strings in the message object.
+     *
+     * @method _htmlEscapeMessage
+     * @param m {Object} the normalized message object
+     * @return Object the message object with proper escapement
+     * @protected
+     */
+    _htmlEscapeMessage : function (m) {
+        m.message         = this._encodeHTML(m.message);
+        m.source          = this._encodeHTML(m.source);
+        m.sourceAndDetail = this._encodeHTML(m.sourceAndDetail);
+        m.category        = this._encodeHTML(m.category);
+
+        return m;
+    },
+
+    /**
+     * Removes the oldest message entries from the UI to maintain the limit
+     * specified in the consoleLimit configuration.
+     *
+     * @method _trimOldEntries
+     * @protected
+     */
+    _trimOldEntries : function () {
+        // Turn off the logging system for the duration of this operation
+        // to prevent an infinite loop
+        Y.config.debug = false;
+
+        var bd = this._body,
+            limit = this.get('consoleLimit'),
+            debug = Y.config.debug,
+            entries,e,i,l;
+
+        if (bd) {
+            entries = bd.queryAll(DOT+C_ENTRY);
+            l = entries.size() - limit;
+
+            if (l > 0) {
+                if (this.get('newestOnTop')) {
+                    i = limit;
+                    l = entries.size();
+                } else {
+                    i = 0;
+                }
+
+                this._body.setStyle('display','none');
+
+                for (;i < l; ++i) {
+                    e = entries.item(i);
+                    if (e) {
+                        e.remove();
+                    }
+                }
+
+                this._body.setStyle('display','');
+            }
+
+        }
+
+        Y.config.debug = debug;
+    },
+
+    /**
+     * Returns the input string with ampersands (&amp;), &lt, and &gt; encoded
+     * as HTML entities.
+     *
+     * @method _encodeHTML
+     * @param s {String} the raw string
+     * @return String the encoded string
+     * @protected
+     */
+    _encodeHTML : function (s) {
+        return isString(s) ?
+            s.replace(RE_AMP,ESC_AMP).
+              replace(RE_LT, ESC_LT).
+              replace(RE_GT, ESC_GT) :
+            s;
+    },
+
+    /**
+     * Clears the timeout for printing buffered messages.
+     *
+     * @method _cancelPrintLoop
+     * @protected
+     */
+    _cancelPrintLoop : function () {
+        if (this._printLoop) {
+            this._printLoop.cancel();
+            this._printLoop = null;
+        }
+    },
+
+    /**
+     * Validates input value for style attribute.  Accepts only values 'inline',
+     * 'block', and 'separate'.
+     *
+     * @method _validateStyle
+     * @param style {String} the proposed value
+     * @return {Boolean} pass/fail
+     * @protected
+     */
+    _validateStyle : function (style) {
+        return style === 'inline' || style === 'block' || style === 'separate';
+    },
+
+    /**
+     * Event handler for clicking on the Pause checkbox to update the paused
+     * attribute.
+     *
+     * @method _onPauseClick
+     * @param e {Event} DOM event facade for the click event
+     * @protected
+     */
+    _onPauseClick : function (e) {
+        this.set(PAUSED,e.target.get(CHECKED));
+    },
+
+    /**
+     * Event handler for clicking on the Clear button.  Pass-through to
+     * <code>this.clearConsole()</code>.
+     *
+     * @method _onClearClick
+     * @param e {Event} DOM event facade for the click event
+     * @protected
+     */
+    _onClearClick : function (e) {
+        this.clearConsole();
+    },
+
+    /**
+     * Event handler for clicking on the Collapse/Expand button. Sets the
+     * &quot;collapsed&quot; attribute accordingly.
+     *
+     * @method _onCollapseClick
+     * @param e {Event} DOM event facade for the click event
+     * @protected
+     */
+    _onCollapseClick : function (e) {
+        this.set(COLLAPSED, !this.get(COLLAPSED));
+    },
+
+
+    /**
+     * Setter method for logLevel attribute.  Acceptable values are
+     * &quot;error&quot, &quot;warn&quot, and &quot;info&quot (case
+     * insensitive).  Other values are treated as &quot;info&quot;.
+     *
+     * @method _setLogLevel
+     * @param v {String} the desired log level
+     * @return String One of Console.LOG_LEVEL_INFO, _WARN, or _ERROR
+     * @protected
+     */
+    _setLogLevel : function (v) {
+        if (isString(v)) {
+            v = v.toLowerCase();
+        }
+        
+        return (v === WARN || v === ERROR) ? v : INFO;
+    },
+
+    /**
+     * Set the height of the Console container.  Set the body height to the difference between the configured height and the calculated heights of the header and footer.
+     * Overrides Widget.prototype._uiSetHeight.
+     *
+     * @method _uiSetHeight
+     * @param v {String|Number} the new height
+     * @protected
+     */
+    _uiSetHeight : function (v) {
+        Console.superclass._uiSetHeight.apply(this,arguments);
+
+        if (this._head && this._foot) {
+            var h = this.get('boundingBox').get('offsetHeight') -
+                    this._head.get('offsetHeight') -
+                    this._foot.get('offsetHeight');
+
+            this._body.setStyle(HEIGHT,h+'px');
+        }
+    },
+
+    /**
+     * Updates the UI if changes are made to any of the strings in the strings
+     * attribute.
+     *
+     * @method _afterStringsChange
+     * @param e {Event} Custom event for the attribute change
+     * @protected
+     */
+    _afterStringsChange : function (e) {
+        var prop   = e.subAttrName ? e.subAttrName.split(DOT)[1] : null,
+            cb     = this.get(CONTENT_BOX),
+            before = e.prevVal,
+            after  = e.newVal;
+
+        if ((!prop || prop === TITLE) && before.title !== after.title) {
+            cb.queryAll(DOT+C_CONSOLE_TITLE).set(INNER_HTML, after.title);
+        }
+
+        if ((!prop || prop === PAUSE) && before.pause !== after.pause) {
+            cb.queryAll(DOT+C_PAUSE_LABEL).set(INNER_HTML, after.pause);
+        }
+
+        if ((!prop || prop === CLEAR) && before.clear !== after.clear) {
+            cb.queryAll(DOT+C_CLEAR).set('value',after.clear);
+        }
+    },
+
+    /**
+     * Updates the UI and schedules or cancels the print loop.
+     *
+     * @method _afterPausedChange
+     * @param e {Event} Custom event for the attribute change
+     * @protected
+     */
+    _afterPausedChange : function (e) {
+        var paused = e.newVal;
+
+        if (e.src !== Y.Widget.SRC_UI) {
+            this._uiUpdatePaused(paused);
+        }
+
+        if (!paused) {
+            this._schedulePrint();
+        } else if (this._printLoop) {
+            this._cancelPrintLoop();
+        }
+    },
+
+    /**
+     * Checks or unchecks the paused checkbox
+     *
+     * @method _uiUpdatePaused
+     * @param on {Boolean} the new checked state
+     * @protected
+     */
+    _uiUpdatePaused : function (on) {
+        var node = this._foot.queryAll('input[type=checkbox].'+C_PAUSE);
+
+        if (node) {
+            node.set(CHECKED,on);
+        }
+    },
+
+    /**
+     * Calls this._trimOldEntries() in response to changes in the configured
+     * consoleLimit attribute.
+     * 
+     * @method _afterConsoleLimitChange
+     * @param e {Event} Custom event for the attribute change
+     * @protected
+     */
+    _afterConsoleLimitChange : function () {
+        this._trimOldEntries();
+    },
+
+
+    /**
+     * Updates the className of the contentBox, which should trigger CSS to
+     * hide or show the body and footer sections depending on the new value.
+     *
+     * @method _afterCollapsedChange
+     * @param e {Event} Custom event for the attribute change
+     * @protected
+     */
+    _afterCollapsedChange : function (e) {
+        this._uiUpdateCollapsed(e.newVal);
+    },
+
+    /**
+     * Updates the UI to reflect the new Collapsed state
+     *
+     * @method _uiUpdateCollapsed
+     * @param v {Boolean} true for collapsed, false for expanded
+     * @protected
+     */
+    _uiUpdateCollapsed : function (v) {
+        var bb     = this.get('boundingBox'),
+            button = bb.queryAll('button.'+C_COLLAPSE),
+            method = v ? 'addClass' : 'removeClass',
+            str    = this.get('strings.'+(v ? 'expand' : 'collapse'));
+
+        bb[method](C_COLLAPSED);
+
+        if (button) {
+            button.set('innerHTML',str);
+        }
+
+        this._uiSetHeight(v ? this._head.get('offsetHeight'): this.get(HEIGHT));
+    },
+
+    /**
+     * Makes adjustments to the UI if needed when the Console is hidden or shown
+     *
+     * @method _afterVisibleChange
+     * @param e {Event} the visibleChange event
+     * @protected
+     */
+    _afterVisibleChange : function (e) {
+        Console.superclass._afterVisibleChange.apply(this,arguments);
+
+        this._uiUpdateFromHideShow(e.newVal);
+    },
+
+    /**
+     * Recalculates dimensions and updates appropriately when shown
+     *
+     * @method _uiUpdateFromHideShow
+     * @param v {Boolean} true for visible, false for hidden
+     * @protected
+     */
+    _uiUpdateFromHideShow : function (v) {
+        if (v) {
+            this._uiSetHeight(this.get(HEIGHT));
+        }
+    },
+
+    /**
+     * Responds to log events by normalizing qualifying messages and passing
+     * them along through the entry event for buffering etc.
+     * 
+     * @method _onLogEvent
+     * @param msg {String} the log message
+     * @param cat {String} OPTIONAL the category or logLevel of the message
+     * @param src {String} OPTIONAL the source of the message (e.g. widget name)
+     * @protected
+     */
+    _onLogEvent : function (e) {
+
+        if (!this.get(DISABLED) && this._isInLogLevel(e)) {
+
+            var debug = Y.config.debug;
+
+            /* TODO: needed? */
+            Y.config.debug = false;
+
+            this.fire(ENTRY, {
+                message : this._normalizeMessage(e)
+            });
+
+            Y.config.debug = debug;
+        }
+    },
+
+    /**
+     * Clears the console, resets the startTime attribute, enables and
+     * unpauses the widget.
+     *
+     * @method _defResetFn
+     * @protected
+     */
+    _defResetFn : function () {
+        this.clearConsole();
+        this.set(START_TIME,new Date());
+        this.set(DISABLED,false);
+        this.set(PAUSED,false);
+    },
+
+    /**
+     * Buffers incoming message objects and schedules the printing.
+     *
+     * @method _defEntryFn
+     * @param e {Event} The Custom event carrying the message in its payload
+     * @protected
+     */
+    _defEntryFn : function (e) {
+        if (e.message) {
+            this.buffer.push(e.message);
+            this._schedulePrint();
+        }
+    }
+
+});
+
+Y.Console = Console;
+
+
+}, '3.0.0' ,{requires:['substitute','widget']});