Current File : /disk/www/wwwroot/test-lingceed.echineselearning.biz/wp-includes/js/wp-pointer.js
/**
* @output wp-includes/js/wp-pointer.js
*/
/**
* Initializes the wp-pointer widget using jQuery UI Widget Factory.
*/
(function($){
var identifier = 0,
zindex = 9999;
$.widget('wp.pointer',/** @lends $.widget.wp.pointer.prototype */{
options: {
pointerClass: 'wp-pointer',
pointerWidth: 320,
content: function() {
return $(this).text();
},
buttons: function( event, t ) {
var button = $('<a class="close" href="#"></a>').text( wp.i18n.__( 'Dismiss' ) );
return button.on( 'click.pointer', function(e) {
e.preventDefault();
t.element.pointer('close');
});
},
position: 'top',
show: function( event, t ) {
t.pointer.show();
t.opened();
},
hide: function( event, t ) {
t.pointer.hide();
t.closed();
},
document: document
},
/**
* A class that represents a WordPress pointer.
*
* @since 3.3.0
* @private
*
* @constructs $.widget.wp.pointer
*/
_create: function() {
var positioning,
family;
this.content = $('<div class="wp-pointer-content"></div>');
this.arrow = $('<div class="wp-pointer-arrow"><div class="wp-pointer-arrow-inner"></div></div>');
family = this.element.parents().add( this.element );
positioning = 'absolute';
if ( family.filter(function(){ return 'fixed' === $(this).css('position'); }).length )
positioning = 'fixed';
this.pointer = $('<div />')
.append( this.content )
.append( this.arrow )
.attr('id', 'wp-pointer-' + identifier++)
.addClass( this.options.pointerClass )
.css({'position': positioning, 'width': this.options.pointerWidth+'px', 'display': 'none'})
.appendTo( this.options.document.body );
},
/**
* Sets an option on the pointer instance.
*
* There are 4 special values that do something extra:
*
* - `document` will transfer the pointer to the body of the new document
* specified by the value.
* - `pointerClass` will change the class of the pointer element.
* - `position` will reposition the pointer.
* - `content` will update the content of the pointer.
*
* @since 3.3.0
* @private
*
* @param {string} key The key of the option to set.
* @param {*} value The value to set the option to.
*/
_setOption: function( key, value ) {
var o = this.options,
tip = this.pointer;
// Handle document transfer.
if ( key === 'document' && value !== o.document ) {
tip.detach().appendTo( value.body );
// Handle class change.
} else if ( key === 'pointerClass' ) {
tip.removeClass( o.pointerClass ).addClass( value );
}
// Call super method.
$.Widget.prototype._setOption.apply( this, arguments );
// Reposition automatically.
if ( key === 'position' ) {
this.reposition();
// Update content automatically if pointer is open.
} else if ( key === 'content' && this.active ) {
this.update();
}
},
/**
* Removes the pointer element from of the DOM.
*
* Makes sure that the widget and all associated bindings are destroyed.
*
* @since 3.3.0
*/
destroy: function() {
this.pointer.remove();
$.Widget.prototype.destroy.call( this );
},
/**
* Returns the pointer element.
*
* @since 3.3.0
*
* @return {Object} Pointer The pointer object.
*/
widget: function() {
return this.pointer;
},
/**
* Updates the content of the pointer.
*
* This function doesn't update the content of the pointer itself. That is done
* by the `_update` method. This method will make sure that the `_update` method
* is called with the right content.
*
* The content in the options can either be a string or a callback. If it is a
* callback the result of this callback is used as the content.
*
* @since 3.3.0
*
* @param {Object} event The event that caused the update.
*
* @return {Promise} Resolves when the update has been executed.
*/
update: function( event ) {
var self = this,
o = this.options,
dfd = $.Deferred(),
content;
if ( o.disabled )
return;
dfd.done( function( content ) {
self._update( event, content );
});
// Either o.content is a string...
if ( typeof o.content === 'string' ) {
content = o.content;
// ...or o.content is a callback.
} else {
content = o.content.call( this.element[0], dfd.resolve, event, this._handoff() );
}
// If content is set, then complete the update.
if ( content )
dfd.resolve( content );
return dfd.promise();
},
/**
* Updates the content of the pointer.
*
* Will make sure that the pointer is correctly positioned.
*
* @since 3.3.0
* @private
*
* @param {Object} event The event that caused the update.
* @param {*} content The content object. Either a string or a jQuery tree.
*/
_update: function( event, content ) {
var buttons,
o = this.options;
if ( ! content )
return;
// Kill any animations on the pointer.
this.pointer.stop();
this.content.html( content );
buttons = o.buttons.call( this.element[0], event, this._handoff() );
if ( buttons ) {
buttons.wrap('<div class="wp-pointer-buttons" />').parent().appendTo( this.content );
}
this.reposition();
},
/**
* Repositions the pointer.
*
* Makes sure the pointer is the correct size for its content and makes sure it
* is positioned to point to the right element.
*
* @since 3.3.0
*/
reposition: function() {
var position;
if ( this.options.disabled )
return;
position = this._processPosition( this.options.position );
// Reposition pointer.
this.pointer.css({
top: 0,
left: 0,
zIndex: zindex++ // Increment the z-index so that it shows above other opened pointers.
}).show().position($.extend({
of: this.element,
collision: 'fit none'
}, position )); // The object comes before this.options.position so the user can override position.of.
this.repoint();
},
/**
* Sets the arrow of the pointer to the correct side of the pointer element.
*
* @since 3.3.0
*/
repoint: function() {
var o = this.options,
edge;
if ( o.disabled )
return;
edge = ( typeof o.position == 'string' ) ? o.position : o.position.edge;
// Remove arrow classes.
this.pointer[0].className = this.pointer[0].className.replace( /wp-pointer-[^\s'"]*/, '' );
// Add arrow class.
this.pointer.addClass( 'wp-pointer-' + edge );
},
/**
* Calculates the correct position based on a position in the settings.
*
* @since 3.3.0
* @private
*
* @param {string|Object} position Either a side of a pointer or an object
* containing a pointer.
*
* @return {Object} result An object containing position related data.
*/
_processPosition: function( position ) {
var opposite = {
top: 'bottom',
bottom: 'top',
left: 'right',
right: 'left'
},
result;
// If the position object is a string, it is shorthand for position.edge.
if ( typeof position == 'string' ) {
result = {
edge: position + ''
};
} else {
result = $.extend( {}, position );
}
if ( ! result.edge )
return result;
if ( result.edge == 'top' || result.edge == 'bottom' ) {
result.align = result.align || 'left';
result.at = result.at || result.align + ' ' + opposite[ result.edge ];
result.my = result.my || result.align + ' ' + result.edge;
} else {
result.align = result.align || 'top';
result.at = result.at || opposite[ result.edge ] + ' ' + result.align;
result.my = result.my || result.edge + ' ' + result.align;
}
return result;
},
/**
* Opens the pointer.
*
* Only opens the pointer widget in case it is closed and not disabled, and
* calls 'update' before doing so. Calling update makes sure that the pointer
* is correctly sized and positioned.
*
* @since 3.3.0
*
* @param {Object} event The event that triggered the opening of this pointer.
*/
open: function( event ) {
var self = this,
o = this.options;
if ( this.active || o.disabled || this.element.is(':hidden') )
return;
this.update().done( function() {
self._open( event );
});
},
/**
* Opens and shows the pointer element.
*
* @since 3.3.0
* @private
*
* @param {Object} event An event object.
*/
_open: function( event ) {
var self = this,
o = this.options;
if ( this.active || o.disabled || this.element.is(':hidden') )
return;
this.active = true;
this._trigger( 'open', event, this._handoff() );
this._trigger( 'show', event, this._handoff({
opened: function() {
self._trigger( 'opened', event, self._handoff() );
}
}));
},
/**
* Closes and hides the pointer element.
*
* @since 3.3.0
*
* @param {Object} event An event object.
*/
close: function( event ) {
if ( !this.active || this.options.disabled )
return;
var self = this;
this.active = false;
this._trigger( 'close', event, this._handoff() );
this._trigger( 'hide', event, this._handoff({
closed: function() {
self._trigger( 'closed', event, self._handoff() );
}
}));
},
/**
* Puts the pointer on top by increasing the z-index.
*
* @since 3.3.0
*/
sendToTop: function() {
if ( this.active )
this.pointer.css( 'z-index', zindex++ );
},
/**
* Toggles the element between shown and hidden.
*
* @since 3.3.0
*
* @param {Object} event An event object.
*/
toggle: function( event ) {
if ( this.pointer.is(':hidden') )
this.open( event );
else
this.close( event );
},
/**
* Extends the pointer and the widget element with the supplied parameter, which
* is either an element or a function.
*
* @since 3.3.0
* @private
*
* @param {Object} extend The object to be merged into the original object.
*
* @return {Object} The extended object.
*/
_handoff: function( extend ) {
return $.extend({
pointer: this.pointer,
element: this.element
}, extend);
}
});
})(jQuery);
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