File yui3/src/button/js/core.js
/**
* Provides an interface for working with button-like DOM nodes
*
* @module button-core
* @since 3.5.0
*/
var getClassName = Y.ClassNameManager.getClassName,
AttributeCore = Y.AttributeCore;
/**
* Creates a button
*
* @class ButtonCore
* @uses AttributeCore
* @param config {Object} Configuration object
* @constructor
*/
function ButtonCore(config) {
this.initializer(config);
}
ButtonCore.prototype = {
/**
*
* @property TEMPLATE
* @type {String}
* @default <button/>
*/
TEMPLATE: '<button/>',
/**
*
* @property constructor
* @type {Object}
* @default ButtonCore
* @private
*/
constructor: ButtonCore,
/**
* @method initializer
* @description Internal init() handler.
* @param config {Object} Config object.
* @private
*/
initializer: function(config) {
this._initNode(config);
this._initAttributes(config);
this._renderUI(config);
},
/**
* @method _initNode
* @description Node initializer
* @param config {Object} Config object.
* @private
*/
_initNode: function(config) {
if (config.host) {
this._host = Y.one(config.host);
} else {
this._host = Y.Node.create(this.TEMPLATE);
}
},
/**
* @method _initAttributes
* @description Attribute initializer
* @param config {Object} Config object.
* @private
*/
_initAttributes: function(config) {
AttributeCore.call(this, ButtonCore.ATTRS, config);
},
/**
* @method renderUI
* @description Renders any UI/DOM elements for Button instances
* @param config {Object} Config object.
* @private
*/
_renderUI: function() {
var node = this.getNode(),
nodeName = node.get('nodeName').toLowerCase();
// Set some default node attributes
node.addClass(ButtonCore.CLASS_NAMES.BUTTON);
if (nodeName !== 'button' && nodeName !== 'input') {
node.set('role', 'button');
}
},
/**
* @method enable
* @description Sets the button's `disabled` DOM attribute to `false`
* @public
*/
enable: function() {
this.set('disabled', false);
},
/**
* @method disable
* @description Sets the button's `disabled` DOM attribute to `true`
* @public
*/
disable: function() {
this.set('disabled', true);
},
/**
* @method getNode
* @description Gets the button's host node
* @return {Node} The host node instance
* @public
*/
getNode: function() {
if (!this._host) {
// If this._host doesn't exist, that means this._initNode
// was never executed, meaning this is likely a Widget and
// the host node should point to the boundingBox.
this._host = this.get('boundingBox');
}
return this._host;
},
/**
* @method _getLabel
* @description Getter for a button's `label` ATTR
* @return {String} The text label of the button
* @private
*/
_getLabel: function () {
var node = this.getNode(),
label = ButtonCore._getTextLabelFromNode(node);
return label;
},
/**
* @method _getLabelHTML
* @description Getter for a button's `labelHTML` ATTR
* @return {String} The HTML label of the button
* @private
*/
_getLabelHTML: function () {
var node = this.getNode(),
labelHTML = ButtonCore._getHTMLFromNode(node);
return labelHTML;
},
/**
* @method _setLabel
* @description Setter for a button's `label` ATTR
* @param value {String} The value to set for `label`
* @param name {String} The name of this ATTR (`label`)
* @param opts {Object} Additional options
* @param opts.src {String} A string identifying the callee.
* `internal` will not sync this value with the `labelHTML` ATTR
* @return {String} The text label for the given node
* @private
*/
_setLabel: function (value, name, opts) {
var label = Y.Escape.html(value);
if (!opts || opts.src !== 'internal') {
this.set('labelHTML', label, {src: 'internal'});
}
return label;
},
/**
* @method _setLabelHTML
* @description Setter for a button's `labelHTML` ATTR
* @param value {String} The value to set for `labelHTML`
* @param name {String} The name of this ATTR (`labelHTML`)
* @param opts {Object} Additional options
* @param opts.src {String} A string identifying the callee.
* `internal` will not sync this value with the `label` ATTR
* @return {String} The HTML label for the given node
* @private
*/
_setLabelHTML: function (value, name, opts) {
var node = this.getNode(),
labelNode = ButtonCore._getLabelNodeFromParent(node),
nodeName = node.get('nodeName').toLowerCase();
if (nodeName === 'input') {
labelNode.set('value', value);
}
else {
labelNode.setHTML(value);
}
if (!opts || opts.src !== 'internal') {
this.set('label', value, {src: 'internal'});
}
return value;
},
/**
* @method _setDisabled
* @description Setter for the `disabled` ATTR
* @param value {boolean}
* @private
*/
_setDisabled: function(value) {
var node = this.getNode();
node.getDOMNode().disabled = value; // avoid rerunning setter when this === node
node.toggleClass(ButtonCore.CLASS_NAMES.DISABLED, value);
return value;
}
};
// ButtonCore inherits from AttributeCore
Y.mix(ButtonCore.prototype, AttributeCore.prototype);
/**
* Attribute configuration.
*
* @property ATTRS
* @type {Object}
* @protected
* @static
*/
ButtonCore.ATTRS = {
/**
* The text of the button's label
*
* @config label
* @type String
*/
label: {
setter: '_setLabel',
getter: '_getLabel',
lazyAdd: false
},
/**
* The HTML of the button's label
*
* This attribute accepts HTML and inserts it into the DOM **without**
* sanitization. This attribute should only be used with HTML that has
* either been escaped (using `Y.Escape.html`), or sanitized according to
* the requirements of your application.
*
* If all you need is support for text labels, please use the `label`
* attribute instead.
*
* @config labelHTML
* @type HTML
*/
labelHTML: {
setter: '_setLabelHTML',
getter: '_getLabelHTML',
lazyAdd: false
},
/**
* The button's enabled/disabled state
*
* @config disabled
* @type Boolean
*/
disabled: {
value: false,
setter: '_setDisabled',
lazyAdd: false
}
};
/**
* Name of this component.
*
* @property NAME
* @type String
* @static
*/
ButtonCore.NAME = "button";
/**
* Array of static constants used to identify the classnames applied to DOM nodes
*
* @property CLASS_NAMES
* @type {Object}
* @public
* @static
*/
ButtonCore.CLASS_NAMES = {
BUTTON : getClassName('button'),
DISABLED: getClassName('button', 'disabled'),
SELECTED: getClassName('button', 'selected'),
LABEL : getClassName('button', 'label')
};
/**
* Array of static constants used to for applying ARIA states
*
* @property ARIA_STATES
* @type {Object}
* @private
* @static
*/
ButtonCore.ARIA_STATES = {
PRESSED : 'aria-pressed',
CHECKED : 'aria-checked'
};
/**
* Array of static constants used to for applying ARIA roles
*
* @property ARIA_ROLES
* @type {Object}
* @private
* @static
*/
ButtonCore.ARIA_ROLES = {
BUTTON : 'button',
CHECKBOX: 'checkbox',
TOGGLE : 'toggle'
};
/**
* Finds the label node within a button
*
* @method _getLabelNodeFromParent
* @param node {Node} The parent node
* @return {Node} The label node
* @private
* @static
*/
ButtonCore._getLabelNodeFromParent = function (node) {
var labelNode = (node.one('.' + ButtonCore.CLASS_NAMES.LABEL) || node);
return labelNode;
};
/**
* Gets a text label from a node
*
* @method _getTextLabelFromNode
* @param node {Node} The parent node
* @return {String} The text label for a given node
* @private
* @static
*/
ButtonCore._getTextLabelFromNode = function (node) {
var labelNode = ButtonCore._getLabelNodeFromParent(node),
nodeName = labelNode.get('nodeName').toLowerCase(),
label = labelNode.get(nodeName === 'input' ? 'value' : 'text');
return label;
};
/**
* A utility method that gets an HTML label from a given node
*
* @method _getHTMLFromNode
* @param node {Node} The parent node
* @return {String} The HTML label for a given node
* @private
* @static
*/
ButtonCore._getHTMLFromNode = function (node) {
var labelNode = ButtonCore._getLabelNodeFromParent(node),
label = labelNode.getHTML();
return label;
};
/**
* Gets the disabled attribute from a node
*
* @method _getDisabledFromNode
* @param node {Node} The parent node
* @return {boolean} The disabled state for a given node
* @private
* @static
*/
ButtonCore._getDisabledFromNode = function (node) {
return node.get('disabled');
};
// Export ButtonCore
Y.ButtonCore = ButtonCore;