# Yahoo! UI Library

### console-filters 3.0.0

Yahoo! UI Library > console-filters > Plugin.ConsoleFilters
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## Class Plugin.ConsoleFilters

Provides Plugin.ConsoleFilters plugin class.

This plugin adds the ability to control which Console entries display by filtering on category and source. Two groups of checkboxes are added to the Console footer, one for categories and the other for sources. Only those messages that match a checked category or source are displayed.

### Properties

#### _categories - `protected Node`

The container node created to house the category filters.

#### _entries - `protected Array`

Collection of all log messages passed through since the plugin's instantiation. This holds all messages regardless of filter status. Used as a single source of truth for repopulating the Console body when filters are changed.

#### _sources - `protected Node`

The container node created to house the source filters.

#### ConsoleFilters.CATEGORIES_TEMPLATE - `static String`

Markup template used to create the container for the category filters.

#### ConsoleFilters.CHROME_CLASSES - `protected static Object`

Classnames used by the templates when creating nodes.

#### ConsoleFilters.FILTER_TEMPLATE - `static String`

Markup template used to create the category and source filter checkboxes.

#### ConsoleFilters.NAME - `static String`

Plugin name.
Default Value: 'consoleFilters'

#### ConsoleFilters.NS - `static String`

The namespace hung off the host object that this plugin will inhabit.
Default Value: 'filter'

#### ConsoleFilters.SOURCES_TEMPLATE - `static String`

Markup template used to create the container for the source filters.

### Methods

#### _afterCacheLimitChange

`protected void _afterCacheLimitChange ( e )`
Trims the cache of entries to the appropriate new length.

Parameters:
  `e <Event>` the attribute change event object

#### _afterCategoryChange

`protected void _afterCategoryChange ( e )`
Triggers the Console to update if a known category filter changes value (e.g. visible => hidden). Updates the appropriate checkbox's checked state if necessary.

Parameters:
  `e <Event>` the attribute change event object

#### _afterClearConsole

`protected void _afterClearConsole ( )`
Flushes the cached entries after a call to the Console's clearConsole().

#### _afterSourceChange

`protected void _afterSourceChange ( e )`
Triggers the Console to update if a known source filter changes value (e.g. visible => hidden). Updates the appropriate checkbox's checked state if necessary.

Parameters:
  `e <Event>` the attribute change event object

#### _createCheckbox

`protected void _createCheckbox ( container , name )`
Creates a checkbox and label from the ConsoleFilters.FILTER_TEMPLATE for the provided type and name. The checkbox and label are appended to the container node passes as the first arg.

Parameters:
  `container <Node>` the parentNode of the new checkbox and label
  `name <String>` the identifier of the filter

#### _filterBuffer

`protected void _filterBuffer ( )`
Flushes the Console's print buffer of any entries that have a category or source that is currently being excluded.

#### _onCategoryCheckboxClick

`protected void _onCategoryCheckboxClick ( e )`
Passes checkbox clicks on to the category attribute.

Parameters:
  `e <Event>` the DOM event

#### _onEntry

`protected void _onEntry ( e )`
Ensures a filter is set up for any new categories or sources and collects the messages in _entries. If the message is stamped with a category or source that is currently being filtered out, the message will not pass to the Console's print buffer.

Parameters:
  `e <Event>` the custom event object

#### _onSourceCheckboxClick

`protected void _onSourceCheckboxClick ( e )`
Passes checkbox clicks on to the source attribute.

Parameters:
  `e <Event>` the DOM event

#### _uiSetCheckbox

`protected void _uiSetCheckbox ( type , item , checked )`
Updates the checked property of a filter checkbox of the specified type. If no checkbox is found for the input params, one is created.

Parameters:
  `type <String>` 'category' or 'source'
  `item <String>` the name of the filter (e.g. 'info', 'event')
  `checked <Boolean>` value to set the checkbox's checked property

#### _validateCategory

`protected _validateCategory ( cat , v )`
Validates category updates are objects and the subattribute is not too deep.

Parameters:
  `cat <String>` the new category:visibility map
  `v <String>` the subattribute path updated

Returns: ``
  Boolean

#### _validateSource

`protected _validateSource ( cat , v )`
Validates source updates are objects and the subattribute is not too deep.

Parameters:
  `cat <String>` the new source:visibility map
  `v <String>` the subattribute path updated

Returns: ``
  Boolean

#### bindUI

`protected void bindUI ( )`
Binds to checkbox click events and internal attribute change events to maintain the UI state.

#### destructor

`protected void destructor ( )`
Removes the plugin UI and unwires events.

#### hideCategory

`void hideCategory ( cat* )`
Hides any number of categories from the UI. Convenience method for myConsole.filter.set('category.foo', false); set('category.bar', false); and so on.

Parameters:
  `cat* <String>` 1..n categories to filter out of the UI

#### hideSource

`void hideSource ( src* )`
Hides any number of sources from the UI. Convenience method for myConsole.filter.set('source.foo', false); set('source.bar', false); and so on.

Parameters:
  `src* <String>` 1..n sources to filter out of the UI

#### initializer

`protected void initializer ( )`
Initialize entries collection and attach listeners to host events and methods.

#### refreshConsole

`void refreshConsole ( )`
Repopulates the Console with entries appropriate to the current filter settings.

#### renderUI

`protected void renderUI ( )`
Adds the category and source filter sections to the Console footer.

#### showCategory

`void showCategory ( cat* )`
Shows any number of categories in the UI. Convenience method for myConsole.filter.set('category.foo', true); set('category.bar', true); and so on.

Parameters:
  `cat* <String>` 1..n categories to allow to display in the UI

#### showSource

`void showSource ( src* )`
Shows any number of sources in the UI. Convenience method for myConsole.filter.set('source.foo', true); set('source.bar', true); and so on.

Parameters:
  `src* <String>` 1..n sources to allow to display in the UI

#### syncUI

`void syncUI ( )`
Updates the UI to be in accordance with the current state of the plugin.

### Events

#### cacheLimitChange

`cacheLimitChange ( event )`
Fires when the value for the configuration attribute 'cacheLimit' is changed. You can listen for the event using the on method if you wish to be notified before the attribute's value has changed, or using the after method if you wish to be notified after the attribute's value has changed.

Parameters:
  `event <Event.Facade>` An Event Facade object with the following attribute specific properties added:
  prevVal
    The value of the attribute, prior to it being set
  newVal
    The value the attribute is to be set to
  attrName
    The name of the attribute being set
  subAttrName
    If setting a property within the attribute's value, the name of the sub-attribute property being set

#### categoryChange

`categoryChange ( event )`
Fires when the value for the configuration attribute 'category' is changed. You can listen for the event using the on method if you wish to be notified before the attribute's value has changed, or using the after method if you wish to be notified after the attribute's value has changed.

Parameters:
  `event <Event.Facade>` An Event Facade object with the following attribute specific properties added:
  prevVal
    The value of the attribute, prior to it being set
  newVal
    The value the attribute is to be set to
  attrName
    The name of the attribute being set
  subAttrName
    If setting a property within the attribute's value, the name of the sub-attribute property being set

#### defaultVisibilityChange

`defaultVisibilityChange ( event )`
Fires when the value for the configuration attribute 'defaultVisibility' is changed. You can listen for the event using the on method if you wish to be notified before the attribute's value has changed, or using the after method if you wish to be notified after the attribute's value has changed.

Parameters:
  `event <Event.Facade>` An Event Facade object with the following attribute specific properties added:
  prevVal
    The value of the attribute, prior to it being set
  newVal
    The value the attribute is to be set to
  attrName
    The name of the attribute being set
  subAttrName
    If setting a property within the attribute's value, the name of the sub-attribute property being set

#### sourceChange

`sourceChange ( event )`
Fires when the value for the configuration attribute 'source' is changed. You can listen for the event using the on method if you wish to be notified before the attribute's value has changed, or using the after method if you wish to be notified after the attribute's value has changed.

Parameters:
  `event <Event.Facade>` An Event Facade object with the following attribute specific properties added:
  prevVal
    The value of the attribute, prior to it being set
  newVal
    The value the attribute is to be set to
  attrName
    The name of the attribute being set
  subAttrName
    If setting a property within the attribute's value, the name of the sub-attribute property being set

### Configuration Attributes

#### cacheLimit `- {Number}`

Maximum number of entries to store in the message cache. Use this to limit the memory footprint in environments with heavy log usage. By default, there is no limit (Number.POSITIVE_INFINITY).
Default Value: Number.POSITIVE_INFINITY

#### category `- Object`

Map of entry categories to their visibility status. Update a particular category's visibility by setting the subattribute to true (visible) or false (hidden).

For example, yconsole.filter.set('category.info', false) to hide log entries with the category/logLevel of 'info'.

Similarly, yconsole.filter.get('category.warn') will return a boolean indicating whether that category is currently being included in the UI.

Unlike the YUI instance configuration's logInclude and logExclude properties, filtered entries are only hidden from the UI, but can be made visible again.

#### defaultVisibility `- {Boolean}`

Default visibility applied to new categories and sources.
Default Value: true

#### source `- Object`

Map of entry sources to their visibility status. Update a particular sources's visibility by setting the subattribute to true (visible) or false (hidden).

For example, yconsole.filter.set('sources.slider', false) to hide log entries originating from Y.Slider.

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