]> scripts.mit.edu Git - autoinstalls/wordpress.git/blobdiff - wp-admin/js/common.js
Wordpress 4.6
[autoinstalls/wordpress.git] / wp-admin / js / common.js
index bf413370dc97284ea2f94568b12e6c8d923422de..200d3e47809d1c7f4a84eb719940fe2f1787139d 100644 (file)
@@ -1,6 +1,10 @@
-/* global setUserSetting, ajaxurl, commonL10n, alert, confirm, toggleWithKeyboard, pagenow */
+/* global setUserSetting, ajaxurl, commonL10n, alert, confirm, pagenow */
 var showNotice, adminMenu, columns, validateForm, screenMeta;
 ( function( $, window, undefined ) {
+       var $document = $( document ),
+               $window = $( window ),
+               $body = $( document.body );
+
 // Removed in 3.3.
 // (perhaps) needed for back-compat
 adminMenu = {
@@ -37,17 +41,19 @@ columns = {
        },
 
        checked : function(column) {
-               $('.column-' + column).show();
+               $('.column-' + column).removeClass( 'hidden' );
                this.colSpanChange(+1);
        },
 
        unchecked : function(column) {
-               $('.column-' + column).hide();
+               $('.column-' + column).addClass( 'hidden' );
                this.colSpanChange(-1);
        },
 
        hidden : function() {
-               return $('.manage-column').filter(':hidden').map(function() { return this.id; }).get().join(',');
+               return $( '.manage-column[id]' ).filter( ':hidden' ).map(function() {
+                       return this.id;
+               }).get().join( ',' );
        },
 
        useCheckboxesForHidden : function() {
@@ -68,7 +74,7 @@ columns = {
        }
 };
 
-$(document).ready(function(){columns.init();});
+$document.ready(function(){columns.init();});
 
 validateForm = function( form ) {
        return !$( form )
@@ -77,7 +83,7 @@ validateForm = function( form ) {
                .addClass( 'form-invalid' )
                .find( 'input:visible' )
                .change( function() { $( this ).closest( '.form-invalid' ).removeClass( 'form-invalid' ); } )
-               .size();
+               .length;
 };
 
 // stub for doing better warnings
@@ -103,15 +109,14 @@ screenMeta = {
 
        init: function() {
                this.element = $('#screen-meta');
-               this.toggles = $('.screen-meta-toggle a');
+               this.toggles = $( '#screen-meta-links' ).find( '.show-settings' );
                this.page    = $('#wpcontent');
 
                this.toggles.click( this.toggleEvent );
        },
 
-       toggleEvent: function( e ) {
-               var panel = $( this.href.replace(/.+#/, '#') );
-               e.preventDefault();
+       toggleEvent: function() {
+               var panel = $( '#' + $( this ).attr( 'aria-controls' ) );
 
                if ( !panel.length )
                        return;
@@ -122,30 +127,34 @@ screenMeta = {
                        screenMeta.open( panel, $(this) );
        },
 
-       open: function( panel, link ) {
+       open: function( panel, button ) {
 
-               $('.screen-meta-toggle').not( link.parent() ).css('visibility', 'hidden');
+               $( '#screen-meta-links' ).find( '.screen-meta-toggle' ).not( button.parent() ).css( 'visibility', 'hidden' );
 
                panel.parent().show();
                panel.slideDown( 'fast', function() {
                        panel.focus();
-                       link.addClass('screen-meta-active').attr('aria-expanded', true);
+                       button.addClass( 'screen-meta-active' ).attr( 'aria-expanded', true );
                });
+
+               $document.trigger( 'screen:options:open' );
        },
 
-       close: function( panel, link ) {
+       close: function( panel, button ) {
                panel.slideUp( 'fast', function() {
-                       link.removeClass('screen-meta-active').attr('aria-expanded', false);
+                       button.removeClass( 'screen-meta-active' ).attr( 'aria-expanded', false );
                        $('.screen-meta-toggle').css('visibility', '');
                        panel.parent().hide();
                });
+
+               $document.trigger( 'screen:options:close' );
        }
 };
 
 /**
  * Help tabs.
  */
-$('.contextual-help-tabs').delegate('a', 'click focus', function(e) {
+$('.contextual-help-tabs').delegate('a', 'click', function(e) {
        var link = $(this),
                panel;
 
@@ -166,20 +175,43 @@ $('.contextual-help-tabs').delegate('a', 'click focus', function(e) {
        panel.addClass('active').show();
 });
 
-$(document).ready( function() {
+$document.ready( function() {
        var checks, first, last, checked, sliced, mobileEvent, transitionTimeout, focusedRowActions,
                lastClicked = false,
-               menu = $('#adminmenu'),
                pageInput = $('input.current-page'),
-               currentPage = pageInput.val();
+               currentPage = pageInput.val(),
+               isIOS = /iPhone|iPad|iPod/.test( navigator.userAgent ),
+               isAndroid = navigator.userAgent.indexOf( 'Android' ) !== -1,
+               isIE8 = $( document.documentElement ).hasClass( 'ie8' ),
+               $adminMenuWrap = $( '#adminmenuwrap' ),
+               $wpwrap = $( '#wpwrap' ),
+               $adminmenu = $( '#adminmenu' ),
+               $overlay = $( '#wp-responsive-overlay' ),
+               $toolbar = $( '#wp-toolbar' ),
+               $toolbarPopups = $toolbar.find( 'a[aria-haspopup="true"]' ),
+               $sortables = $('.meta-box-sortables'),
+               wpResponsiveActive = false,
+               $adminbar = $( '#wpadminbar' ),
+               lastScrollPosition = 0,
+               pinnedMenuTop = false,
+               pinnedMenuBottom = false,
+               menuTop = 0,
+               menuIsPinned = false,
+               height = {
+                       window: $window.height(),
+                       wpwrap: $wpwrap.height(),
+                       adminbar: $adminbar.height(),
+                       menu: $adminMenuWrap.height()
+               };
+
 
        // when the menu is folded, make the fly-out submenu header clickable
-       menu.on('click.wp-submenu-head', '.wp-submenu-head', function(e){
+       $adminmenu.on('click.wp-submenu-head', '.wp-submenu-head', function(e){
                $(e.target).parent().siblings('a').get(0).click();
        });
 
        $('#collapse-menu').on('click.collapse-menu', function() {
-               var body = $( document.body ), respWidth;
+               var respWidth, state;
 
                // reset any compensation for submenus near the bottom of the screen
                $('#adminmenu div.wp-submenu').css('margin-top', '');
@@ -189,129 +221,207 @@ $(document).ready( function() {
                        respWidth = Math.max( window.innerWidth, document.documentElement.clientWidth );
                } else {
                        // IE < 9 doesn't support @media CSS rules
-                       respWidth = 901;
+                       respWidth = 961;
                }
 
-               if ( respWidth && respWidth < 900 ) {
-                       if ( body.hasClass('auto-fold') ) {
-                               body.removeClass('auto-fold').removeClass('folded');
+               if ( respWidth && respWidth < 960 ) {
+                       if ( $body.hasClass('auto-fold') ) {
+                               $body.removeClass('auto-fold').removeClass('folded');
                                setUserSetting('unfold', 1);
                                setUserSetting('mfold', 'o');
+                               state = 'open';
                        } else {
-                               body.addClass('auto-fold');
+                               $body.addClass('auto-fold');
                                setUserSetting('unfold', 0);
+                               state = 'folded';
                        }
                } else {
-                       if ( body.hasClass('folded') ) {
-                               body.removeClass('folded');
+                       if ( $body.hasClass('folded') ) {
+                               $body.removeClass('folded');
                                setUserSetting('mfold', 'o');
+                               state = 'open';
                        } else {
-                               body.addClass('folded');
+                               $body.addClass('folded');
                                setUserSetting('mfold', 'f');
+                               state = 'folded';
                        }
                }
+
+               currentMenuItemHasPopup();
+               $document.trigger( 'wp-collapse-menu', { state: state } );
        });
 
+       // Handle the `aria-haspopup` attribute on the current menu item when it has a sub-menu.
+       function currentMenuItemHasPopup() {
+               var respWidth,
+                       $current = $( 'a.wp-has-current-submenu' );
+
+               if ( window.innerWidth ) {
+                       respWidth = Math.max( window.innerWidth, document.documentElement.clientWidth );
+               } else {
+                       respWidth = 961;
+               }
+
+               if ( $body.hasClass( 'folded' ) || ( $body.hasClass( 'auto-fold' ) && respWidth && respWidth <= 960 && respWidth > 782 ) ) {
+                       // When folded or auto-folded and not responsive view, the current menu item does have a fly-out sub-menu.
+                       $current.attr( 'aria-haspopup', 'true' );
+               } else {
+                       // When expanded or in responsive view, reset aria-haspopup.
+                       $current.attr( 'aria-haspopup', 'false' );
+               }
+       }
+
+       $document.on( 'wp-window-resized wp-responsive-activate wp-responsive-deactivate', currentMenuItemHasPopup );
+
+       /**
+        * Ensure an admin submenu is within the visual viewport.
+        *
+        * @since 4.1.0
+        *
+        * @param {jQuery} $menuItem The parent menu item containing the submenu.
+        */
+       function adjustSubmenu( $menuItem ) {
+               var bottomOffset, pageHeight, adjustment, theFold, menutop, wintop, maxtop,
+                       $submenu = $menuItem.find( '.wp-submenu' );
+
+               menutop = $menuItem.offset().top;
+               wintop = $window.scrollTop();
+               maxtop = menutop - wintop - 30; // max = make the top of the sub almost touch admin bar
+
+               bottomOffset = menutop + $submenu.height() + 1; // Bottom offset of the menu
+               pageHeight = $wpwrap.height(); // Height of the entire page
+               adjustment = 60 + bottomOffset - pageHeight;
+               theFold = $window.height() + wintop - 50; // The fold
+
+               if ( theFold < ( bottomOffset - adjustment ) ) {
+                       adjustment = bottomOffset - theFold;
+               }
+
+               if ( adjustment > maxtop ) {
+                       adjustment = maxtop;
+               }
+
+               if ( adjustment > 1 ) {
+                       $submenu.css( 'margin-top', '-' + adjustment + 'px' );
+               } else {
+                       $submenu.css( 'margin-top', '' );
+               }
+       }
+
        if ( 'ontouchstart' in window || /IEMobile\/[1-9]/.test(navigator.userAgent) ) { // touch screen device
                // iOS Safari works with touchstart, the rest work with click
-               mobileEvent = /Mobile\/.+Safari/.test(navigator.userAgent) ? 'touchstart' : 'click';
+               mobileEvent = isIOS ? 'touchstart' : 'click';
 
                // close any open submenus when touch/click is not on the menu
-               $(document.body).on( mobileEvent+'.wp-mobile-hover', function(e) {
-                       if ( menu.data('wp-responsive') ) {
+               $body.on( mobileEvent+'.wp-mobile-hover', function(e) {
+                       if ( $adminmenu.data('wp-responsive') ) {
                                return;
                        }
 
-                       if ( ! $(e.target).closest('#adminmenu').length ) {
-                               menu.find('li.wp-has-submenu.opensub').removeClass('opensub');
+                       if ( ! $( e.target ).closest( '#adminmenu' ).length ) {
+                               $adminmenu.find( 'li.opensub' ).removeClass( 'opensub' );
                        }
                });
 
-               menu.find('a.wp-has-submenu').on( mobileEvent+'.wp-mobile-hover', function(e) {
-                       var el = $(this), parent = el.parent();
+               $adminmenu.find( 'a.wp-has-submenu' ).on( mobileEvent + '.wp-mobile-hover', function( event ) {
+                       var $menuItem = $(this).parent();
 
-                       if ( menu.data('wp-responsive') ) {
+                       if ( $adminmenu.data( 'wp-responsive' ) ) {
                                return;
                        }
 
                        // Show the sub instead of following the link if:
                        //      - the submenu is not open
                        //      - the submenu is not shown inline or the menu is not folded
-                       if ( !parent.hasClass('opensub') && ( !parent.hasClass('wp-menu-open') || parent.width() < 40 ) ) {
-                               e.preventDefault();
-                               menu.find('li.opensub').removeClass('opensub');
-                               parent.addClass('opensub');
+                       if ( ! $menuItem.hasClass( 'opensub' ) && ( ! $menuItem.hasClass( 'wp-menu-open' ) || $menuItem.width() < 40 ) ) {
+                               event.preventDefault();
+                               adjustSubmenu( $menuItem );
+                               $adminmenu.find( 'li.opensub' ).removeClass( 'opensub' );
+                               $menuItem.addClass('opensub');
                        }
                });
        }
 
-       menu.find('li.wp-has-submenu').hoverIntent({
-               over: function() {
-                       var b, h, o, f, m = $(this).find('.wp-submenu'), menutop, wintop, maxtop, top = parseInt( m.css('top'), 10 );
+       if ( ! isIOS && ! isAndroid ) {
+               $adminmenu.find( 'li.wp-has-submenu' ).hoverIntent({
+                       over: function() {
+                               var $menuItem = $( this ),
+                                       $submenu = $menuItem.find( '.wp-submenu' ),
+                                       top = parseInt( $submenu.css( 'top' ), 10 );
 
-                       if ( isNaN(top) || top > -5 ) // meaning the submenu is visible
-                               return;
-
-                       if ( menu.data('wp-responsive') ) {
-                               // The menu is in responsive mode, bail
-                               return;
-                       }
-
-                       menutop = $(this).offset().top;
-                       wintop = $(window).scrollTop();
-                       maxtop = menutop - wintop - 30; // max = make the top of the sub almost touch admin bar
-
-                       b = menutop + m.height() + 1; // Bottom offset of the menu
-                       h = $('#wpwrap').height(); // Height of the entire page
-                       o = 60 + b - h;
-                       f = $(window).height() + wintop - 15; // The fold
+                               if ( isNaN( top ) || top > -5 ) { // the submenu is visible
+                                       return;
+                               }
 
-                       if ( f < (b - o) )
-                               o = b - f;
+                               if ( $adminmenu.data( 'wp-responsive' ) ) {
+                                       // The menu is in responsive mode, bail
+                                       return;
+                               }
 
-                       if ( o > maxtop )
-                               o = maxtop;
+                               adjustSubmenu( $menuItem );
+                               $adminmenu.find( 'li.opensub' ).removeClass( 'opensub' );
+                               $menuItem.addClass( 'opensub' );
+                       },
+                       out: function(){
+                               if ( $adminmenu.data( 'wp-responsive' ) ) {
+                                       // The menu is in responsive mode, bail
+                                       return;
+                               }
 
-                       if ( o > 1 )
-                               m.css('margin-top', '-'+o+'px');
-                       else
-                               m.css('margin-top', '');
+                               $( this ).removeClass( 'opensub' ).find( '.wp-submenu' ).css( 'margin-top', '' );
+                       },
+                       timeout: 200,
+                       sensitivity: 7,
+                       interval: 90
+               });
 
-                       menu.find('li.menu-top').removeClass('opensub');
-                       $(this).addClass('opensub');
-               },
-               out: function(){
-                       if ( menu.data('wp-responsive') ) {
+               $adminmenu.on( 'focus.adminmenu', '.wp-submenu a', function( event ) {
+                       if ( $adminmenu.data( 'wp-responsive' ) ) {
                                // The menu is in responsive mode, bail
                                return;
                        }
 
-                       $(this).removeClass('opensub').find('.wp-submenu').css('margin-top', '');
-               },
-               timeout: 200,
-               sensitivity: 7,
-               interval: 90
-       });
+                       $( event.target ).closest( 'li.menu-top' ).addClass( 'opensub' );
+               }).on( 'blur.adminmenu', '.wp-submenu a', function( event ) {
+                       if ( $adminmenu.data( 'wp-responsive' ) ) {
+                               return;
+                       }
 
-       menu.on('focus.adminmenu', '.wp-submenu a', function(e){
-               if ( menu.data('wp-responsive') ) {
-                       // The menu is in responsive mode, bail
-                       return;
-               }
+                       $( event.target ).closest( 'li.menu-top' ).removeClass( 'opensub' );
+               }).find( 'li.wp-has-submenu.wp-not-current-submenu' ).on( 'focusin.adminmenu', function() {
+                       adjustSubmenu( $( this ) );
+               });
+       }
 
-               $(e.target).closest('li.menu-top').addClass('opensub');
-       }).on('blur.adminmenu', '.wp-submenu a', function(e){
-               if ( menu.data('wp-responsive') ) {
-                       // The menu is in responsive mode, bail
-                       return;
-               }
+       /*
+        * The `.below-h2` class is here just for backward compatibility with plugins
+        * that are (incorrectly) using it. Do not use. Use `.inline` instead. See #34570.
+        */
+       $( 'div.updated, div.error, div.notice' ).not( '.inline, .below-h2' ).insertAfter( $( '.wrap h1, .wrap h2' ).first() );
+
+       // Make notices dismissible
+       function makeNoticesDismissible() {
+               $( '.notice.is-dismissible' ).each( function() {
+                       var $el = $( this ),
+                               $button = $( '<button type="button" class="notice-dismiss"><span class="screen-reader-text"></span></button>' ),
+                               btnText = commonL10n.dismiss || '';
+
+                       // Ensure plain text
+                       $button.find( '.screen-reader-text' ).text( btnText );
+                       $button.on( 'click.wp-dismiss-notice', function( event ) {
+                               event.preventDefault();
+                               $el.fadeTo( 100, 0, function() {
+                                       $el.slideUp( 100, function() {
+                                               $el.remove();
+                                       });
+                               });
+                       });
 
-               $(e.target).closest('li.menu-top').removeClass('opensub');
-       });
+                       $el.append( $button );
+               });
+       }
 
-       // Move .updated and .error alert boxes. Don't move boxes designed to be inline.
-       $('div.wrap h2:first').nextAll('div.updated, div.error').addClass('below-h2');
-       $('div.updated, div.error').not('.below-h2, .inline').insertAfter( $('div.wrap h2:first') );
+       $document.on( 'wp-updates-notice-added wp-plugin-install-error wp-plugin-update-error wp-plugin-delete-error wp-theme-install-error wp-theme-delete-error', makeNoticesDismissible );
 
        // Init screen meta
        screenMeta.init();
@@ -321,7 +431,7 @@ $(document).ready( function() {
                if ( 'undefined' == e.shiftKey ) { return true; }
                if ( e.shiftKey ) {
                        if ( !lastClicked ) { return true; }
-                       checks = $( lastClicked ).closest( 'form' ).find( ':checkbox' );
+                       checks = $( lastClicked ).closest( 'form' ).find( ':checkbox' ).filter( ':visible:enabled' );
                        first = checks.index( lastClicked );
                        last = checks.index( this );
                        checked = $(this).prop('checked');
@@ -338,7 +448,7 @@ $(document).ready( function() {
                lastClicked = this;
 
                // toggle "check all" checkboxes
-               var unchecked = $(this).closest('tbody').find(':checkbox').filter(':visible').not(':checked');
+               var unchecked = $(this).closest('tbody').find(':checkbox').filter(':visible:enabled').not(':checked');
                $(this).closest('table').children('thead, tfoot').find(':checkbox').prop('checked', function() {
                        return ( 0 === unchecked.length );
                });
@@ -346,45 +456,62 @@ $(document).ready( function() {
                return true;
        });
 
-       $('thead, tfoot').find('.check-column :checkbox').click( function(e) {
-               var c = $(this).prop('checked'),
-                       kbtoggle = 'undefined' == typeof toggleWithKeyboard ? false : toggleWithKeyboard,
-                       toggle = e.shiftKey || kbtoggle;
+       $('thead, tfoot').find('.check-column :checkbox').on( 'click.wp-toggle-checkboxes', function( event ) {
+               var $this = $(this),
+                       $table = $this.closest( 'table' ),
+                       controlChecked = $this.prop('checked'),
+                       toggle = event.shiftKey || $this.data('wp-toggle');
+
+               $table.children( 'tbody' ).filter(':visible')
+                       .children().children('.check-column').find(':checkbox')
+                       .prop('checked', function() {
+                               if ( $(this).is(':hidden,:disabled') ) {
+                                       return false;
+                               }
+
+                               if ( toggle ) {
+                                       return ! $(this).prop( 'checked' );
+                               } else if ( controlChecked ) {
+                                       return true;
+                               }
 
-               $(this).closest( 'table' ).children( 'tbody' ).filter(':visible')
-               .children().children('.check-column').find(':checkbox')
-               .prop('checked', function() {
-                       if ( $(this).is(':hidden') )
                                return false;
-                       if ( toggle )
-                               return $(this).prop( 'checked' );
-                       else if (c)
-                               return true;
-                       return false;
-               });
+                       });
+
+               $table.children('thead,  tfoot').filter(':visible')
+                       .children().children('.check-column').find(':checkbox')
+                       .prop('checked', function() {
+                               if ( toggle ) {
+                                       return false;
+                               } else if ( controlChecked ) {
+                                       return true;
+                               }
 
-               $(this).closest('table').children('thead,  tfoot').filter(':visible')
-               .children().children('.check-column').find(':checkbox')
-               .prop('checked', function() {
-                       if ( toggle )
                                return false;
-                       else if (c)
-                               return true;
-                       return false;
-               });
+                       });
        });
 
        // Show row actions on keyboard focus of its parent container element or any other elements contained within
-       $( 'td.post-title, td.title, td.comment, .bookmarks td.column-name, td.blogname, td.username, .dashboard-comment-wrap' ).focusin(function(){
-               clearTimeout( transitionTimeout );
-               focusedRowActions = $(this).find( '.row-actions' );
-               focusedRowActions.addClass( 'visible' );
-       }).focusout(function(){
-               // Tabbing between post title and .row-actions links needs a brief pause, otherwise
-               // the .row-actions div gets hidden in transit in some browsers (ahem, Firefox).
-               transitionTimeout = setTimeout(function(){
-                       focusedRowActions.removeClass( 'visible' );
-               }, 30);
+       $( '#wpbody-content' ).on({
+               focusin: function() {
+                       clearTimeout( transitionTimeout );
+                       focusedRowActions = $( this ).find( '.row-actions' );
+                       // transitionTimeout is necessary for Firefox, but Chrome won't remove the CSS class without a little help.
+                       $( '.row-actions' ).not( this ).removeClass( 'visible' );
+                       focusedRowActions.addClass( 'visible' );
+               },
+               focusout: function() {
+                       // Tabbing between post title and .row-actions links needs a brief pause, otherwise
+                       // the .row-actions div gets hidden in transit in some browsers (ahem, Firefox).
+                       transitionTimeout = setTimeout( function() {
+                               focusedRowActions.removeClass( 'visible' );
+                       }, 30 );
+               }
+       }, '.has-row-actions' );
+
+       // Toggle list table rows on small screens
+       $( 'tbody' ).on( 'click', '.toggle-row', function() {
+               $( this ).closest( 'tr' ).toggleClass( 'is-expanded' );
        });
 
        $('#default-password-nag-no').click( function() {
@@ -398,6 +525,8 @@ $(document).ready( function() {
                var el = e.target, selStart, selEnd, val, scroll, sel;
 
                if ( e.keyCode == 27 ) { // escape key
+                       // when pressing Escape: Opera 12 and 27 blur form fields, IE 8 clears them
+                       e.preventDefault();
                        $(el).data('tab-out', true);
                        return;
                }
@@ -414,10 +543,6 @@ $(document).ready( function() {
                selEnd = el.selectionEnd;
                val = el.value;
 
-               try {
-                       this.lastKey = 9; // not a standard DOM property, lastKey is to help stop Opera tab event. See blur handler below.
-               } catch(err) {}
-
                if ( document.selection ) {
                        el.focus();
                        sel = document.selection.createRange();
@@ -435,11 +560,6 @@ $(document).ready( function() {
                        e.preventDefault();
        });
 
-       $('#newcontent').bind('blur.wpevent_InsertTab', function() {
-               if ( this.lastKey && 9 == this.lastKey )
-                       this.focus();
-       });
-
        if ( pageInput.length ) {
                pageInput.closest('form').submit( function() {
 
@@ -475,76 +595,172 @@ $(document).ready( function() {
                toggleUploadButton();
                input.on('change', toggleUploadButton);
        })();
-});
 
-// Fire a custom jQuery event at the end of window resize
-( function() {
-       var timeout;
+       function pinMenu( event ) {
+               var windowPos = $window.scrollTop(),
+                       resizing = ! event || event.type !== 'scroll';
 
-       function triggerEvent() {
-               $(document).trigger( 'wp-window-resized' );
-       }
+               if ( isIOS || isIE8 || $adminmenu.data( 'wp-responsive' ) ) {
+                       return;
+               }
 
-       function fireOnce() {
-               window.clearTimeout( timeout );
-               timeout = window.setTimeout( triggerEvent, 200 );
-       }
+               if ( height.menu + height.adminbar < height.window ||
+                       height.menu + height.adminbar + 20 > height.wpwrap ) {
+                       unpinMenu();
+                       return;
+               }
 
-       $(window).on( 'resize.wp-fire-once', fireOnce );
-}());
+               menuIsPinned = true;
 
-$(document).ready( function() {
-       var $document = $( document ),
-               $window = $( window ),
-               $body = $( document.body ),
-               $adminMenuWrap = $( '#adminmenuwrap' ),
-               $collapseMenu = $( '#collapse-menu' ),
-               $wpwrap = $( '#wpwrap' ),
-               $adminmenu = $( '#adminmenu' ),
-               $overlay = $( '#wp-responsive-overlay' ),
-               $toolbar = $( '#wp-toolbar' ),
-               $toolbarPopups = $toolbar.find( 'a[aria-haspopup="true"]' ),
-               $sortables = $('.meta-box-sortables'),
-               stickyMenuActive = false,
-               wpResponsiveActive = false;
-
-       window.stickyMenu = {
-               enable: function() {
-                       if ( ! stickyMenuActive ) {
-                               $document.on( 'wp-window-resized.sticky-menu', $.proxy( this.update, this ) );
-                               $collapseMenu.on( 'click.sticky-menu', $.proxy( this.update, this ) );
-                               this.update();
-                               stickyMenuActive = true;
-                       }
-               },
+               if ( height.menu + height.adminbar > height.window ) {
+                       // Check for overscrolling
+                       if ( windowPos < 0 ) {
+                               if ( ! pinnedMenuTop ) {
+                                       pinnedMenuTop = true;
+                                       pinnedMenuBottom = false;
+
+                                       $adminMenuWrap.css({
+                                               position: 'fixed',
+                                               top: '',
+                                               bottom: ''
+                                       });
+                               }
 
-               disable: function() {
-                       if ( stickyMenuActive ) {
-                               $window.off( 'resize.sticky-menu' );
-                               $collapseMenu.off( 'click.sticky-menu' );
-                               $body.removeClass( 'sticky-menu' );
-                               stickyMenuActive = false;
+                               return;
+                       } else if ( windowPos + height.window > $document.height() - 1 ) {
+                               if ( ! pinnedMenuBottom ) {
+                                       pinnedMenuBottom = true;
+                                       pinnedMenuTop = false;
+
+                                       $adminMenuWrap.css({
+                                               position: 'fixed',
+                                               top: '',
+                                               bottom: 0
+                                       });
+                               }
+
+                               return;
                        }
-               },
 
-               update: function() {
-                       // Make the admin menu sticky if the viewport is taller than it
-                       if ( $window.height() > $adminMenuWrap.height() + 32 ) {
-                               if ( ! $body.hasClass( 'sticky-menu' ) ) {
-                                       $body.addClass( 'sticky-menu' );
+                       if ( windowPos > lastScrollPosition ) {
+                               // Scrolling down
+                               if ( pinnedMenuTop ) {
+                                       // let it scroll
+                                       pinnedMenuTop = false;
+                                       menuTop = $adminMenuWrap.offset().top - height.adminbar - ( windowPos - lastScrollPosition );
+
+                                       if ( menuTop + height.menu + height.adminbar < windowPos + height.window ) {
+                                               menuTop = windowPos + height.window - height.menu - height.adminbar;
+                                       }
+
+                                       $adminMenuWrap.css({
+                                               position: 'absolute',
+                                               top: menuTop,
+                                               bottom: ''
+                                       });
+                               } else if ( ! pinnedMenuBottom && $adminMenuWrap.offset().top + height.menu < windowPos + height.window ) {
+                                       // pin the bottom
+                                       pinnedMenuBottom = true;
+
+                                       $adminMenuWrap.css({
+                                               position: 'fixed',
+                                               top: '',
+                                               bottom: 0
+                                       });
                                }
-                       } else {
-                               if ( $body.hasClass( 'sticky-menu' ) ) {
-                                       $body.removeClass( 'sticky-menu' );
+                       } else if ( windowPos < lastScrollPosition ) {
+                               // Scrolling up
+                               if ( pinnedMenuBottom ) {
+                                       // let it scroll
+                                       pinnedMenuBottom = false;
+                                       menuTop = $adminMenuWrap.offset().top - height.adminbar + ( lastScrollPosition - windowPos );
+
+                                       if ( menuTop + height.menu > windowPos + height.window ) {
+                                               menuTop = windowPos;
+                                       }
+
+                                       $adminMenuWrap.css({
+                                               position: 'absolute',
+                                               top: menuTop,
+                                               bottom: ''
+                                       });
+                               } else if ( ! pinnedMenuTop && $adminMenuWrap.offset().top >= windowPos + height.adminbar ) {
+                                       // pin the top
+                                       pinnedMenuTop = true;
+
+                                       $adminMenuWrap.css({
+                                               position: 'fixed',
+                                               top: '',
+                                               bottom: ''
+                                       });
+                               }
+                       } else if ( resizing ) {
+                               // Resizing
+                               pinnedMenuTop = pinnedMenuBottom = false;
+                               menuTop = windowPos + height.window - height.menu - height.adminbar - 1;
+
+                               if ( menuTop > 0 ) {
+                                       $adminMenuWrap.css({
+                                               position: 'absolute',
+                                               top: menuTop,
+                                               bottom: ''
+                                       });
+                               } else {
+                                       unpinMenu();
                                }
                        }
                }
-       };
+
+               lastScrollPosition = windowPos;
+       }
+
+       function resetHeights() {
+               height = {
+                       window: $window.height(),
+                       wpwrap: $wpwrap.height(),
+                       adminbar: $adminbar.height(),
+                       menu: $adminMenuWrap.height()
+               };
+       }
+
+       function unpinMenu() {
+               if ( isIOS || ! menuIsPinned ) {
+                       return;
+               }
+
+               pinnedMenuTop = pinnedMenuBottom = menuIsPinned = false;
+               $adminMenuWrap.css({
+                       position: '',
+                       top: '',
+                       bottom: ''
+               });
+       }
+
+       function setPinMenu() {
+               resetHeights();
+
+               if ( $adminmenu.data('wp-responsive') ) {
+                       $body.removeClass( 'sticky-menu' );
+                       unpinMenu();
+               } else if ( height.menu + height.adminbar > height.window ) {
+                       pinMenu();
+                       $body.removeClass( 'sticky-menu' );
+               } else {
+                       $body.addClass( 'sticky-menu' );
+                       unpinMenu();
+               }
+       }
+
+       if ( ! isIOS ) {
+               $window.on( 'scroll.pin-menu', pinMenu );
+               $document.on( 'tinymce-editor-init.pin-menu', function( event, editor ) {
+                       editor.on( 'wp-autoresize', resetHeights );
+               });
+       }
 
        window.wpResponsive = {
                init: function() {
-                       var self = this,
-                               scrollStart = 0;
+                       var self = this;
 
                        // Modify functionality based on custom activate/deactivate event
                        $document.on( 'wp-responsive-activate.wp-responsive', function() {
@@ -553,19 +769,27 @@ $(document).ready( function() {
                                self.deactivate();
                        });
 
+                       $( '#wp-admin-bar-menu-toggle a' ).attr( 'aria-expanded', 'false' );
+
                        // Toggle sidebar when toggle is clicked
                        $( '#wp-admin-bar-menu-toggle' ).on( 'click.wp-responsive', function( event ) {
                                event.preventDefault();
+
+                               // close any open toolbar submenus
+                               $adminbar.find( '.hover' ).removeClass( 'hover' );
+
                                $wpwrap.toggleClass( 'wp-responsive-open' );
+                               if ( $wpwrap.hasClass( 'wp-responsive-open' ) ) {
+                                       $(this).find('a').attr( 'aria-expanded', 'true' );
+                                       $( '#adminmenu a:first' ).focus();
+                               } else {
+                                       $(this).find('a').attr( 'aria-expanded', 'false' );
+                               }
                        } );
 
                        // Add menu events
-                       $adminmenu.on( 'touchstart.wp-responsive', 'li.wp-has-submenu > a', function() {
-                               scrollStart = $window.scrollTop();
-                       }).on( 'touchend.wp-responsive click.wp-responsive', 'li.wp-has-submenu > a', function( event ) {
-                               if ( ! $adminmenu.data('wp-responsive') ||
-                                       ( event.type === 'touchend' && $window.scrollTop() !== scrollStart ) ) {
-
+                       $adminmenu.on( 'click.wp-responsive', 'li.wp-has-submenu > a', function( event ) {
+                               if ( ! $adminmenu.data('wp-responsive') ) {
                                        return;
                                }
 
@@ -587,7 +811,7 @@ $(document).ready( function() {
                },
 
                activate: function() {
-                       window.stickyMenu.disable();
+                       setPinMenu();
 
                        if ( ! $body.hasClass( 'auto-fold' ) ) {
                                $body.addClass( 'auto-fold' );
@@ -598,7 +822,7 @@ $(document).ready( function() {
                },
 
                deactivate: function() {
-                       window.stickyMenu.enable();
+                       setPinMenu();
                        $adminmenu.removeData('wp-responsive');
                        this.enableSortables();
                },
@@ -671,11 +895,44 @@ $(document).ready( function() {
                }
        };
 
-       window.stickyMenu.enable();
+       // Add an ARIA role `button` to elements that behave like UI controls when JavaScript is on.
+       function aria_button_if_js() {
+               $( '.aria-button-if-js' ).attr( 'role', 'button' );
+       }
+
+       $( document ).ajaxComplete( function() {
+               aria_button_if_js();
+       });
+
        window.wpResponsive.init();
+       setPinMenu();
+       currentMenuItemHasPopup();
+       makeNoticesDismissible();
+       aria_button_if_js();
+
+       $document.on( 'wp-pin-menu wp-window-resized.pin-menu postboxes-columnchange.pin-menu postbox-toggled.pin-menu wp-collapse-menu.pin-menu wp-scroll-start.pin-menu', setPinMenu );
+
+       // Set initial focus on a specific element.
+       $( '.wp-initial-focus' ).focus();
 });
 
-// make Windows 8 devices playing along nicely
+// Fire a custom jQuery event at the end of window resize
+( function() {
+       var timeout;
+
+       function triggerEvent() {
+               $document.trigger( 'wp-window-resized' );
+       }
+
+       function fireOnce() {
+               window.clearTimeout( timeout );
+               timeout = window.setTimeout( triggerEvent, 200 );
+       }
+
+       $window.on( 'resize.wp-fire-once', fireOnce );
+}());
+
+// Make Windows 8 devices play along nicely.
 (function(){
        if ( '-ms-user-select' in document.documentElement.style && navigator.userAgent.match(/IEMobile\/10\.0/) ) {
                var msViewportStyle = document.createElement( 'style' );
@@ -686,15 +943,4 @@ $(document).ready( function() {
        }
 })();
 
-// internal use
-$(document).bind( 'wp_CloseOnEscape', function( e, data ) {
-       if ( typeof(data.cb) != 'function' )
-               return;
-
-       if ( typeof(data.condition) != 'function' || data.condition() )
-               data.cb();
-
-       return true;
-});
-
 }( jQuery, window ));