As the sun rises and the forest mist clears, and the clouds return and the caves darken, these changes of light and shadow are the morning and evening in the mountains. Wildflowers bloom with their subtle fragrance, fine trees flourish with their dense shade, the wind and frost are pure and clean, and the water recedes to reveal the rocks—these are the four seasons in the mountains. Going out in the morning and returning in the evening, the scenery of the four seasons is different, and the joy is endless.至于负者歌于途,行者休于树,前者呼,后者应,伛偻提携,往来而不绝者,滁人游也。临溪而渔,溪深而鱼肥,酿泉为酒,泉香而酒洌,山肴野蔌,杂然而前陈者,太守宴也。宴酣之乐,非丝非竹,射者中,弈者胜,觥筹交错,起坐而喧哗者,众宾欢也。苍颜白发,颓然乎其间者,太守醉也。
/**
* @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);