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/customize-preview-nav-menus.js
*/
/* global _wpCustomizePreviewNavMenusExports */
/** @namespace wp.customize.navMenusPreview */
wp.customize.navMenusPreview = wp.customize.MenusCustomizerPreview = ( function( $, _, wp, api ) {
'use strict';
var self = {
data: {
navMenuInstanceArgs: {}
}
};
if ( 'undefined' !== typeof _wpCustomizePreviewNavMenusExports ) {
_.extend( self.data, _wpCustomizePreviewNavMenusExports );
}
/**
* Initialize nav menus preview.
*/
self.init = function() {
var self = this, synced = false;
/*
* Keep track of whether we synced to determine whether or not bindSettingListener
* should also initially fire the listener. This initial firing needs to wait until
* after all of the settings have been synced from the pane in order to prevent
* an infinite selective fallback-refresh. Note that this sync handler will be
* added after the sync handler in customize-preview.js, so it will be triggered
* after all of the settings are added.
*/
api.preview.bind( 'sync', function() {
synced = true;
} );
if ( api.selectiveRefresh ) {
// Listen for changes to settings related to nav menus.
api.each( function( setting ) {
self.bindSettingListener( setting );
} );
api.bind( 'add', function( setting ) {
/*
* Handle case where an invalid nav menu item (one for which its associated object has been deleted)
* is synced from the controls into the preview. Since invalid nav menu items are filtered out from
* being exported to the frontend by the _is_valid_nav_menu_item filter in wp_get_nav_menu_items(),
* the customizer controls will have a nav_menu_item setting where the preview will have none, and
* this can trigger an infinite fallback refresh when the nav menu item lacks any valid items.
*/
if ( setting.get() && ! setting.get()._invalid ) {
self.bindSettingListener( setting, { fire: synced } );
}
} );
api.bind( 'remove', function( setting ) {
self.unbindSettingListener( setting );
} );
/*
* Ensure that wp_nav_menu() instances nested inside of other partials
* will be recognized as being present on the page.
*/
api.selectiveRefresh.bind( 'render-partials-response', function( response ) {
if ( response.nav_menu_instance_args ) {
_.extend( self.data.navMenuInstanceArgs, response.nav_menu_instance_args );
}
} );
}
api.preview.bind( 'active', function() {
self.highlightControls();
} );
};
if ( api.selectiveRefresh ) {
/**
* Partial representing an invocation of wp_nav_menu().
*
* @memberOf wp.customize.navMenusPreview
* @alias wp.customize.navMenusPreview.NavMenuInstancePartial
*
* @class
* @augments wp.customize.selectiveRefresh.Partial
* @since 4.5.0
*/
self.NavMenuInstancePartial = api.selectiveRefresh.Partial.extend(/** @lends wp.customize.navMenusPreview.NavMenuInstancePartial.prototype */{
/**
* Constructor.
*
* @since 4.5.0
* @param {string} id - Partial ID.
* @param {Object} options
* @param {Object} options.params
* @param {Object} options.params.navMenuArgs
* @param {string} options.params.navMenuArgs.args_hmac
* @param {string} [options.params.navMenuArgs.theme_location]
* @param {number} [options.params.navMenuArgs.menu]
* @param {Object} [options.constructingContainerContext]
*/
initialize: function( id, options ) {
var partial = this, matches, argsHmac;
matches = id.match( /^nav_menu_instance\[([0-9a-f]{32})]$/ );
if ( ! matches ) {
throw new Error( 'Illegal id for nav_menu_instance partial. The key corresponds with the args HMAC.' );
}
argsHmac = matches[1];
options = options || {};
options.params = _.extend(
{
selector: '[data-customize-partial-id="' + id + '"]',
navMenuArgs: options.constructingContainerContext || {},
containerInclusive: true
},
options.params || {}
);
api.selectiveRefresh.Partial.prototype.initialize.call( partial, id, options );
if ( ! _.isObject( partial.params.navMenuArgs ) ) {
throw new Error( 'Missing navMenuArgs' );
}
if ( partial.params.navMenuArgs.args_hmac !== argsHmac ) {
throw new Error( 'args_hmac mismatch with id' );
}
},
/**
* Return whether the setting is related to this partial.
*
* @since 4.5.0
* @param {wp.customize.Value|string} setting - Object or ID.
* @param {number|Object|false|null} newValue - New value, or null if the setting was just removed.
* @param {number|Object|false|null} oldValue - Old value, or null if the setting was just added.
* @return {boolean}
*/
isRelatedSetting: function( setting, newValue, oldValue ) {
var partial = this, navMenuLocationSetting, navMenuId, isNavMenuItemSetting, _newValue, _oldValue, urlParser;
if ( _.isString( setting ) ) {
setting = api( setting );
}
/*
* Prevent nav_menu_item changes only containing type_label differences triggering a refresh.
* These settings in the preview do not include type_label property, and so if one of these
* nav_menu_item settings is dirty, after a refresh the nav menu instance would do a selective
* refresh immediately because the setting from the pane would have the type_label whereas
* the setting in the preview would not, thus triggering a change event. The following
* condition short-circuits this unnecessary selective refresh and also prevents an infinite
* loop in the case where a nav_menu_instance partial had done a fallback refresh.
* @todo Nav menu item settings should not include a type_label property to begin with.
*/
isNavMenuItemSetting = /^nav_menu_item\[/.test( setting.id );
if ( isNavMenuItemSetting && _.isObject( newValue ) && _.isObject( oldValue ) ) {
_newValue = _.clone( newValue );
_oldValue = _.clone( oldValue );
delete _newValue.type_label;
delete _oldValue.type_label;
// Normalize URL scheme when parent frame is HTTPS to prevent selective refresh upon initial page load.
if ( 'https' === api.preview.scheme.get() ) {
urlParser = document.createElement( 'a' );
urlParser.href = _newValue.url;
urlParser.protocol = 'https:';
_newValue.url = urlParser.href;
urlParser.href = _oldValue.url;
urlParser.protocol = 'https:';
_oldValue.url = urlParser.href;
}
// Prevent original_title differences from causing refreshes if title is present.
if ( newValue.title ) {
delete _oldValue.original_title;
delete _newValue.original_title;
}
if ( _.isEqual( _oldValue, _newValue ) ) {
return false;
}
}
if ( partial.params.navMenuArgs.theme_location ) {
if ( 'nav_menu_locations[' + partial.params.navMenuArgs.theme_location + ']' === setting.id ) {
return true;
}
navMenuLocationSetting = api( 'nav_menu_locations[' + partial.params.navMenuArgs.theme_location + ']' );
}
navMenuId = partial.params.navMenuArgs.menu;
if ( ! navMenuId && navMenuLocationSetting ) {
navMenuId = navMenuLocationSetting();
}
if ( ! navMenuId ) {
return false;
}
return (
( 'nav_menu[' + navMenuId + ']' === setting.id ) ||
( isNavMenuItemSetting && (
( newValue && newValue.nav_menu_term_id === navMenuId ) ||
( oldValue && oldValue.nav_menu_term_id === navMenuId )
) )
);
},
/**
* Make sure that partial fallback behavior is invoked if there is no associated menu.
*
* @since 4.5.0
*
* @return {Promise}
*/
refresh: function() {
var partial = this, menuId, deferred = $.Deferred();
// Make sure the fallback behavior is invoked when the partial is no longer associated with a menu.
if ( _.isNumber( partial.params.navMenuArgs.menu ) ) {
menuId = partial.params.navMenuArgs.menu;
} else if ( partial.params.navMenuArgs.theme_location && api.has( 'nav_menu_locations[' + partial.params.navMenuArgs.theme_location + ']' ) ) {
menuId = api( 'nav_menu_locations[' + partial.params.navMenuArgs.theme_location + ']' ).get();
}
if ( ! menuId ) {
partial.fallback();
deferred.reject();
return deferred.promise();
}
return api.selectiveRefresh.Partial.prototype.refresh.call( partial );
},
/**
* Render content.
*
* @inheritdoc
* @param {wp.customize.selectiveRefresh.Placement} placement
*/
renderContent: function( placement ) {
var partial = this, previousContainer = placement.container;
// Do fallback behavior to refresh preview if menu is now empty.
if ( '' === placement.addedContent ) {
placement.partial.fallback();
}
if ( api.selectiveRefresh.Partial.prototype.renderContent.call( partial, placement ) ) {
// Trigger deprecated event.
$( document ).trigger( 'customize-preview-menu-refreshed', [ {
instanceNumber: null, // @deprecated
wpNavArgs: placement.context, // @deprecated
wpNavMenuArgs: placement.context,
oldContainer: previousContainer,
newContainer: placement.container
} ] );
}
}
});
api.selectiveRefresh.partialConstructor.nav_menu_instance = self.NavMenuInstancePartial;
/**
* Request full refresh if there are nav menu instances that lack partials which also match the supplied args.
*
* @param {Object} navMenuInstanceArgs
*/
self.handleUnplacedNavMenuInstances = function( navMenuInstanceArgs ) {
var unplacedNavMenuInstances;
unplacedNavMenuInstances = _.filter( _.values( self.data.navMenuInstanceArgs ), function( args ) {
return ! api.selectiveRefresh.partial.has( 'nav_menu_instance[' + args.args_hmac + ']' );
} );
if ( _.findWhere( unplacedNavMenuInstances, navMenuInstanceArgs ) ) {
api.selectiveRefresh.requestFullRefresh();
return true;
}
return false;
};
/**
* Add change listener for a nav_menu[], nav_menu_item[], or nav_menu_locations[] setting.
*
* @since 4.5.0
*
* @param {wp.customize.Value} setting
* @param {Object} [options]
* @param {boolean} options.fire Whether to invoke the callback after binding.
* This is used when a dynamic setting is added.
* @return {boolean} Whether the setting was bound.
*/
self.bindSettingListener = function( setting, options ) {
var matches;
options = options || {};
matches = setting.id.match( /^nav_menu\[(-?\d+)]$/ );
if ( matches ) {
setting._navMenuId = parseInt( matches[1], 10 );
setting.bind( this.onChangeNavMenuSetting );
if ( options.fire ) {
this.onChangeNavMenuSetting.call( setting, setting(), false );
}
return true;
}
matches = setting.id.match( /^nav_menu_item\[(-?\d+)]$/ );
if ( matches ) {
setting._navMenuItemId = parseInt( matches[1], 10 );
setting.bind( this.onChangeNavMenuItemSetting );
if ( options.fire ) {
this.onChangeNavMenuItemSetting.call( setting, setting(), false );
}
return true;
}
matches = setting.id.match( /^nav_menu_locations\[(.+?)]/ );
if ( matches ) {
setting._navMenuThemeLocation = matches[1];
setting.bind( this.onChangeNavMenuLocationsSetting );
if ( options.fire ) {
this.onChangeNavMenuLocationsSetting.call( setting, setting(), false );
}
return true;
}
return false;
};
/**
* Remove change listeners for nav_menu[], nav_menu_item[], or nav_menu_locations[] setting.
*
* @since 4.5.0
*
* @param {wp.customize.Value} setting
*/
self.unbindSettingListener = function( setting ) {
setting.unbind( this.onChangeNavMenuSetting );
setting.unbind( this.onChangeNavMenuItemSetting );
setting.unbind( this.onChangeNavMenuLocationsSetting );
};
/**
* Handle change for nav_menu[] setting for nav menu instances lacking partials.
*
* @since 4.5.0
*
* @this {wp.customize.Value}
*/
self.onChangeNavMenuSetting = function() {
var setting = this;
self.handleUnplacedNavMenuInstances( {
menu: setting._navMenuId
} );
// Ensure all nav menu instances with a theme_location assigned to this menu are handled.
api.each( function( otherSetting ) {
if ( ! otherSetting._navMenuThemeLocation ) {
return;
}
if ( setting._navMenuId === otherSetting() ) {
self.handleUnplacedNavMenuInstances( {
theme_location: otherSetting._navMenuThemeLocation
} );
}
} );
};
/**
* Handle change for nav_menu_item[] setting for nav menu instances lacking partials.
*
* @since 4.5.0
*
* @param {Object} newItem New value for nav_menu_item[] setting.
* @param {Object} oldItem Old value for nav_menu_item[] setting.
* @this {wp.customize.Value}
*/
self.onChangeNavMenuItemSetting = function( newItem, oldItem ) {
var item = newItem || oldItem, navMenuSetting;
navMenuSetting = api( 'nav_menu[' + String( item.nav_menu_term_id ) + ']' );
if ( navMenuSetting ) {
self.onChangeNavMenuSetting.call( navMenuSetting );
}
};
/**
* Handle change for nav_menu_locations[] setting for nav menu instances lacking partials.
*
* @since 4.5.0
*
* @this {wp.customize.Value}
*/
self.onChangeNavMenuLocationsSetting = function() {
var setting = this, hasNavMenuInstance;
self.handleUnplacedNavMenuInstances( {
theme_location: setting._navMenuThemeLocation
} );
// If there are no wp_nav_menu() instances that refer to the theme location, do full refresh.
hasNavMenuInstance = !! _.findWhere( _.values( self.data.navMenuInstanceArgs ), {
theme_location: setting._navMenuThemeLocation
} );
if ( ! hasNavMenuInstance ) {
api.selectiveRefresh.requestFullRefresh();
}
};
}
/**
* Connect nav menu items with their corresponding controls in the pane.
*
* Setup shift-click on nav menu items which are more granular than the nav menu partial itself.
* Also this applies even if a nav menu is not partial-refreshable.
*
* @since 4.5.0
*/
self.highlightControls = function() {
var selector = '.menu-item';
// Skip adding highlights if not in the customizer preview iframe.
if ( ! api.settings.channel ) {
return;
}
// Focus on the menu item control when shift+clicking the menu item.
$( document ).on( 'click', selector, function( e ) {
var navMenuItemParts;
if ( ! e.shiftKey ) {
return;
}
navMenuItemParts = $( this ).attr( 'class' ).match( /(?:^|\s)menu-item-(-?\d+)(?:\s|$)/ );
if ( navMenuItemParts ) {
e.preventDefault();
e.stopPropagation(); // Make sure a sub-nav menu item will get focused instead of parent items.
api.preview.send( 'focus-nav-menu-item-control', parseInt( navMenuItemParts[1], 10 ) );
}
});
};
api.bind( 'preview-ready', function() {
self.init();
} );
return self;
}( jQuery, _, wp, wp.customize ) );