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。
/*!
* jQuery UI Accordion 1.13.3
* https://jqueryui.com
*
* Copyright OpenJS Foundation and other contributors
* Released under the MIT license.
* https://jquery.org/license
*/
//>>label: Accordion
//>>group: Widgets
/* eslint-disable max-len */
//>>description: Displays collapsible content panels for presenting information in a limited amount of space.
/* eslint-enable max-len */
//>>docs: https://api.jqueryui.com/accordion/
//>>demos: https://jqueryui.com/accordion/
//>>css.structure: ../../themes/base/core.css
//>>css.structure: ../../themes/base/accordion.css
//>>css.theme: ../../themes/base/theme.css
( function( factory ) {
"use strict";
if ( typeof define === "function" && define.amd ) {
// AMD. Register as an anonymous module.
define( [
"jquery",
"../version",
"../keycode",
"../unique-id",
"../widget"
], factory );
} else {
// Browser globals
factory( jQuery );
}
} )( function( $ ) {
"use strict";
return $.widget( "ui.accordion", {
version: "1.13.3",
options: {
active: 0,
animate: {},
classes: {
"ui-accordion-header": "ui-corner-top",
"ui-accordion-header-collapsed": "ui-corner-all",
"ui-accordion-content": "ui-corner-bottom"
},
collapsible: false,
event: "click",
header: function( elem ) {
return elem.find( "> li > :first-child" ).add( elem.find( "> :not(li)" ).even() );
},
heightStyle: "auto",
icons: {
activeHeader: "ui-icon-triangle-1-s",
header: "ui-icon-triangle-1-e"
},
// Callbacks
activate: null,
beforeActivate: null
},
hideProps: {
borderTopWidth: "hide",
borderBottomWidth: "hide",
paddingTop: "hide",
paddingBottom: "hide",
height: "hide"
},
showProps: {
borderTopWidth: "show",
borderBottomWidth: "show",
paddingTop: "show",
paddingBottom: "show",
height: "show"
},
_create: function() {
var options = this.options;
this.prevShow = this.prevHide = $();
this._addClass( "ui-accordion", "ui-widget ui-helper-reset" );
this.element.attr( "role", "tablist" );
// Don't allow collapsible: false and active: false / null
if ( !options.collapsible && ( options.active === false || options.active == null ) ) {
options.active = 0;
}
this._processPanels();
// handle negative values
if ( options.active < 0 ) {
options.active += this.headers.length;
}
this._refresh();
},
_getCreateEventData: function() {
return {
header: this.active,
panel: !this.active.length ? $() : this.active.next()
};
},
_createIcons: function() {
var icon, children,
icons = this.options.icons;
if ( icons ) {
icon = $( "<span>" );
this._addClass( icon, "ui-accordion-header-icon", "ui-icon " + icons.header );
icon.prependTo( this.headers );
children = this.active.children( ".ui-accordion-header-icon" );
this._removeClass( children, icons.header )
._addClass( children, null, icons.activeHeader )
._addClass( this.headers, "ui-accordion-icons" );
}
},
_destroyIcons: function() {
this._removeClass( this.headers, "ui-accordion-icons" );
this.headers.children( ".ui-accordion-header-icon" ).remove();
},
_destroy: function() {
var contents;
// Clean up main element
this.element.removeAttr( "role" );
// Clean up headers
this.headers
.removeAttr( "role aria-expanded aria-selected aria-controls tabIndex" )
.removeUniqueId();
this._destroyIcons();
// Clean up content panels
contents = this.headers.next()
.css( "display", "" )
.removeAttr( "role aria-hidden aria-labelledby" )
.removeUniqueId();
if ( this.options.heightStyle !== "content" ) {
contents.css( "height", "" );
}
},
_setOption: function( key, value ) {
if ( key === "active" ) {
// _activate() will handle invalid values and update this.options
this._activate( value );
return;
}
if ( key === "event" ) {
if ( this.options.event ) {
this._off( this.headers, this.options.event );
}
this._setupEvents( value );
}
this._super( key, value );
// Setting collapsible: false while collapsed; open first panel
if ( key === "collapsible" && !value && this.options.active === false ) {
this._activate( 0 );
}
if ( key === "icons" ) {
this._destroyIcons();
if ( value ) {
this._createIcons();
}
}
},
_setOptionDisabled: function( value ) {
this._super( value );
this.element.attr( "aria-disabled", value );
// Support: IE8 Only
// #5332 / #6059 - opacity doesn't cascade to positioned elements in IE
// so we need to add the disabled class to the headers and panels
this._toggleClass( null, "ui-state-disabled", !!value );
this._toggleClass( this.headers.add( this.headers.next() ), null, "ui-state-disabled",
!!value );
},
_keydown: function( event ) {
if ( event.altKey || event.ctrlKey ) {
return;
}
var keyCode = $.ui.keyCode,
length = this.headers.length,
currentIndex = this.headers.index( event.target ),
toFocus = false;
switch ( event.keyCode ) {
case keyCode.RIGHT:
case keyCode.DOWN:
toFocus = this.headers[ ( currentIndex + 1 ) % length ];
break;
case keyCode.LEFT:
case keyCode.UP:
toFocus = this.headers[ ( currentIndex - 1 + length ) % length ];
break;
case keyCode.SPACE:
case keyCode.ENTER:
this._eventHandler( event );
break;
case keyCode.HOME:
toFocus = this.headers[ 0 ];
break;
case keyCode.END:
toFocus = this.headers[ length - 1 ];
break;
}
if ( toFocus ) {
$( event.target ).attr( "tabIndex", -1 );
$( toFocus ).attr( "tabIndex", 0 );
$( toFocus ).trigger( "focus" );
event.preventDefault();
}
},
_panelKeyDown: function( event ) {
if ( event.keyCode === $.ui.keyCode.UP && event.ctrlKey ) {
$( event.currentTarget ).prev().trigger( "focus" );
}
},
refresh: function() {
var options = this.options;
this._processPanels();
// Was collapsed or no panel
if ( ( options.active === false && options.collapsible === true ) ||
!this.headers.length ) {
options.active = false;
this.active = $();
// active false only when collapsible is true
} else if ( options.active === false ) {
this._activate( 0 );
// was active, but active panel is gone
} else if ( this.active.length && !$.contains( this.element[ 0 ], this.active[ 0 ] ) ) {
// all remaining panel are disabled
if ( this.headers.length === this.headers.find( ".ui-state-disabled" ).length ) {
options.active = false;
this.active = $();
// activate previous panel
} else {
this._activate( Math.max( 0, options.active - 1 ) );
}
// was active, active panel still exists
} else {
// make sure active index is correct
options.active = this.headers.index( this.active );
}
this._destroyIcons();
this._refresh();
},
_processPanels: function() {
var prevHeaders = this.headers,
prevPanels = this.panels;
if ( typeof this.options.header === "function" ) {
this.headers = this.options.header( this.element );
} else {
this.headers = this.element.find( this.options.header );
}
this._addClass( this.headers, "ui-accordion-header ui-accordion-header-collapsed",
"ui-state-default" );
this.panels = this.headers.next().filter( ":not(.ui-accordion-content-active)" ).hide();
this._addClass( this.panels, "ui-accordion-content", "ui-helper-reset ui-widget-content" );
// Avoid memory leaks (#10056)
if ( prevPanels ) {
this._off( prevHeaders.not( this.headers ) );
this._off( prevPanels.not( this.panels ) );
}
},
_refresh: function() {
var maxHeight,
options = this.options,
heightStyle = options.heightStyle,
parent = this.element.parent();
this.active = this._findActive( options.active );
this._addClass( this.active, "ui-accordion-header-active", "ui-state-active" )
._removeClass( this.active, "ui-accordion-header-collapsed" );
this._addClass( this.active.next(), "ui-accordion-content-active" );
this.active.next().show();
this.headers
.attr( "role", "tab" )
.each( function() {
var header = $( this ),
headerId = header.uniqueId().attr( "id" ),
panel = header.next(),
panelId = panel.uniqueId().attr( "id" );
header.attr( "aria-controls", panelId );
panel.attr( "aria-labelledby", headerId );
} )
.next()
.attr( "role", "tabpanel" );
this.headers
.not( this.active )
.attr( {
"aria-selected": "false",
"aria-expanded": "false",
tabIndex: -1
} )
.next()
.attr( {
"aria-hidden": "true"
} )
.hide();
// Make sure at least one header is in the tab order
if ( !this.active.length ) {
this.headers.eq( 0 ).attr( "tabIndex", 0 );
} else {
this.active.attr( {
"aria-selected": "true",
"aria-expanded": "true",
tabIndex: 0
} )
.next()
.attr( {
"aria-hidden": "false"
} );
}
this._createIcons();
this._setupEvents( options.event );
if ( heightStyle === "fill" ) {
maxHeight = parent.height();
this.element.siblings( ":visible" ).each( function() {
var elem = $( this ),
position = elem.css( "position" );
if ( position === "absolute" || position === "fixed" ) {
return;
}
maxHeight -= elem.outerHeight( true );
} );
this.headers.each( function() {
maxHeight -= $( this ).outerHeight( true );
} );
this.headers.next()
.each( function() {
$( this ).height( Math.max( 0, maxHeight -
$( this ).innerHeight() + $( this ).height() ) );
} )
.css( "overflow", "auto" );
} else if ( heightStyle === "auto" ) {
maxHeight = 0;
this.headers.next()
.each( function() {
var isVisible = $( this ).is( ":visible" );
if ( !isVisible ) {
$( this ).show();
}
maxHeight = Math.max( maxHeight, $( this ).css( "height", "" ).height() );
if ( !isVisible ) {
$( this ).hide();
}
} )
.height( maxHeight );
}
},
_activate: function( index ) {
var active = this._findActive( index )[ 0 ];
// Trying to activate the already active panel
if ( active === this.active[ 0 ] ) {
return;
}
// Trying to collapse, simulate a click on the currently active header
active = active || this.active[ 0 ];
this._eventHandler( {
target: active,
currentTarget: active,
preventDefault: $.noop
} );
},
_findActive: function( selector ) {
return typeof selector === "number" ? this.headers.eq( selector ) : $();
},
_setupEvents: function( event ) {
var events = {
keydown: "_keydown"
};
if ( event ) {
$.each( event.split( " " ), function( index, eventName ) {
events[ eventName ] = "_eventHandler";
} );
}
this._off( this.headers.add( this.headers.next() ) );
this._on( this.headers, events );
this._on( this.headers.next(), { keydown: "_panelKeyDown" } );
this._hoverable( this.headers );
this._focusable( this.headers );
},
_eventHandler: function( event ) {
var activeChildren, clickedChildren,
options = this.options,
active = this.active,
clicked = $( event.currentTarget ),
clickedIsActive = clicked[ 0 ] === active[ 0 ],
collapsing = clickedIsActive && options.collapsible,
toShow = collapsing ? $() : clicked.next(),
toHide = active.next(),
eventData = {
oldHeader: active,
oldPanel: toHide,
newHeader: collapsing ? $() : clicked,
newPanel: toShow
};
event.preventDefault();
if (
// click on active header, but not collapsible
( clickedIsActive && !options.collapsible ) ||
// allow canceling activation
( this._trigger( "beforeActivate", event, eventData ) === false ) ) {
return;
}
options.active = collapsing ? false : this.headers.index( clicked );
// When the call to ._toggle() comes after the class changes
// it causes a very odd bug in IE 8 (see #6720)
this.active = clickedIsActive ? $() : clicked;
this._toggle( eventData );
// Switch classes
// corner classes on the previously active header stay after the animation
this._removeClass( active, "ui-accordion-header-active", "ui-state-active" );
if ( options.icons ) {
activeChildren = active.children( ".ui-accordion-header-icon" );
this._removeClass( activeChildren, null, options.icons.activeHeader )
._addClass( activeChildren, null, options.icons.header );
}
if ( !clickedIsActive ) {
this._removeClass( clicked, "ui-accordion-header-collapsed" )
._addClass( clicked, "ui-accordion-header-active", "ui-state-active" );
if ( options.icons ) {
clickedChildren = clicked.children( ".ui-accordion-header-icon" );
this._removeClass( clickedChildren, null, options.icons.header )
._addClass( clickedChildren, null, options.icons.activeHeader );
}
this._addClass( clicked.next(), "ui-accordion-content-active" );
}
},
_toggle: function( data ) {
var toShow = data.newPanel,
toHide = this.prevShow.length ? this.prevShow : data.oldPanel;
// Handle activating a panel during the animation for another activation
this.prevShow.add( this.prevHide ).stop( true, true );
this.prevShow = toShow;
this.prevHide = toHide;
if ( this.options.animate ) {
this._animate( toShow, toHide, data );
} else {
toHide.hide();
toShow.show();
this._toggleComplete( data );
}
toHide.attr( {
"aria-hidden": "true"
} );
toHide.prev().attr( {
"aria-selected": "false",
"aria-expanded": "false"
} );
// if we're switching panels, remove the old header from the tab order
// if we're opening from collapsed state, remove the previous header from the tab order
// if we're collapsing, then keep the collapsing header in the tab order
if ( toShow.length && toHide.length ) {
toHide.prev().attr( {
"tabIndex": -1,
"aria-expanded": "false"
} );
} else if ( toShow.length ) {
this.headers.filter( function() {
return parseInt( $( this ).attr( "tabIndex" ), 10 ) === 0;
} )
.attr( "tabIndex", -1 );
}
toShow
.attr( "aria-hidden", "false" )
.prev()
.attr( {
"aria-selected": "true",
"aria-expanded": "true",
tabIndex: 0
} );
},
_animate: function( toShow, toHide, data ) {
var total, easing, duration,
that = this,
adjust = 0,
boxSizing = toShow.css( "box-sizing" ),
down = toShow.length &&
( !toHide.length || ( toShow.index() < toHide.index() ) ),
animate = this.options.animate || {},
options = down && animate.down || animate,
complete = function() {
that._toggleComplete( data );
};
if ( typeof options === "number" ) {
duration = options;
}
if ( typeof options === "string" ) {
easing = options;
}
// fall back from options to animation in case of partial down settings
easing = easing || options.easing || animate.easing;
duration = duration || options.duration || animate.duration;
if ( !toHide.length ) {
return toShow.animate( this.showProps, duration, easing, complete );
}
if ( !toShow.length ) {
return toHide.animate( this.hideProps, duration, easing, complete );
}
total = toShow.show().outerHeight();
toHide.animate( this.hideProps, {
duration: duration,
easing: easing,
step: function( now, fx ) {
fx.now = Math.round( now );
}
} );
toShow
.hide()
.animate( this.showProps, {
duration: duration,
easing: easing,
complete: complete,
step: function( now, fx ) {
fx.now = Math.round( now );
if ( fx.prop !== "height" ) {
if ( boxSizing === "content-box" ) {
adjust += fx.now;
}
} else if ( that.options.heightStyle !== "content" ) {
fx.now = Math.round( total - toHide.outerHeight() - adjust );
adjust = 0;
}
}
} );
},
_toggleComplete: function( data ) {
var toHide = data.oldPanel,
prev = toHide.prev();
this._removeClass( toHide, "ui-accordion-content-active" );
this._removeClass( prev, "ui-accordion-header-active" )
._addClass( prev, "ui-accordion-header-collapsed" );
// Work around for rendering bug in IE (#5421)
if ( toHide.length ) {
toHide.parent()[ 0 ].className = toHide.parent()[ 0 ].className;
}
this._trigger( "activate", null, data );
}
} );
} );