/wp-admin/js/common.js

var showNotice, adminMenu, columns, validateForm, screenMeta;
(function($){
// Removed in 3.3.
// (perhaps) needed for back-compat
adminMenu = {
	init : function() {},
	fold : function() {},
	restoreMenuState : function() {},
	toggle : function() {},
	favorites : function() {}
};

// show/hide/save table columns
columns = {
	init : function() {
		var that = this;
		$('.hide-column-tog', '#adv-settings').click( function() {
			var $t = $(this), column = $t.val();
			if ( $t.prop('checked') )
				that.checked(column);
			else
				that.unchecked(column);

			columns.saveManageColumnsState();
		});
	},

	saveManageColumnsState : function() {
		var hidden = this.hidden();
		$.post(ajaxurl, {
			action: 'hidden-columns',
			hidden: hidden,
			screenoptionnonce: $('#screenoptionnonce').val(),
			page: pagenow
		});
	},

	checked : function(column) {
		$('.column-' + column).show();
		this.colSpanChange(+1);
	},

	unchecked : function(column) {
		$('.column-' + column).hide();
		this.colSpanChange(-1);
	},

	hidden : function() {
		return $('.manage-column').filter(':hidden').map(function() { return this.id; }).get().join(',');
	},

	useCheckboxesForHidden : function() {
		this.hidden = function(){
			return $('.hide-column-tog').not(':checked').map(function() {
				var id = this.id;
				return id.substring( id, id.length - 5 );
			}).get().join(',');
		};
	},

	colSpanChange : function(diff) {
		var $t = $('table').find('.colspanchange'), n;
		if ( !$t.length )
			return;
		n = parseInt( $t.attr('colspan'), 10 ) + diff;
		$t.attr('colspan', n.toString());
	}
}

$(document).ready(function(){columns.init();});

validateForm = function( form ) {
	return !$( form ).find('.form-required').filter( function() { return $('input:visible', this).val() == ''; } ).addClass( 'form-invalid' ).find('input:visible').change( function() { $(this).closest('.form-invalid').removeClass( 'form-invalid' ); } ).size();
}

// stub for doing better warnings
showNotice = {
	warn : function() {
		var msg = commonL10n.warnDelete || '';
		if ( confirm(msg) ) {
			return true;
		}

		return false;
	},

	note : function(text) {
		alert(text);
	}
};

screenMeta = {
	element: null, // #screen-meta
	toggles: null, // .screen-meta-toggle
	page:    null, // #wpcontent

	init: function() {
		this.element = $('#screen-meta');
		this.toggles = $('.screen-meta-toggle a');
		this.page    = $('#wpcontent');

		this.toggles.click( this.toggleEvent );
	},

	toggleEvent: function( e ) {
		var panel = $( this.href.replace(/.+#/, '#') );
		e.preventDefault();

		if ( !panel.length )
			return;

		if ( panel.is(':visible') )
			screenMeta.close( panel, $(this) );
		else
			screenMeta.open( panel, $(this) );
	},

	open: function( panel, link ) {

		$('.screen-meta-toggle').not( link.parent() ).css('visibility', 'hidden');

		panel.parent().show();
		panel.slideDown( 'fast', function() {
			panel.focus();
			link.addClass('screen-meta-active').attr('aria-expanded', true);
		});
	},

	close: function( panel, link ) {
		panel.slideUp( 'fast', function() {
			link.removeClass('screen-meta-active').attr('aria-expanded', false);
			$('.screen-meta-toggle').css('visibility', '');
			panel.parent().hide();
		});
	}
};

/**
 * Help tabs.
 */
$('.contextual-help-tabs').delegate('a', 'click focus', function(e) {
	var link = $(this),
		panel;

	e.preventDefault();

	// Don't do anything if the click is for the tab already showing.
	if ( link.is('.active a') )
		return false;

	// Links
	$('.contextual-help-tabs .active').removeClass('active');
	link.parent('li').addClass('active');

	panel = $( link.attr('href') );

	// Panels
	$('.help-tab-content').not( panel ).removeClass('active').hide();
	panel.addClass('active').show();
});

$(document).ready( function() {
	var lastClicked = false, checks, first, last, checked, menu = $('#adminmenu'), mobileEvent,
		pageInput = $('input.current-page'), currentPage = pageInput.val();

	// when the menu is folded, make the fly-out submenu header clickable
	menu.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(e){
		var body = $( document.body ), respWidth;

		// reset any compensation for submenus near the bottom of the screen
		$('#adminmenu div.wp-submenu').css('margin-top', '');

		// WebKit excludes the width of the vertical scrollbar when applying the CSS "@media screen and (max-width: ...)"
		// and matches $(window).width().
		// Firefox and IE > 8 include the scrollbar width, so after the jQuery normalization
		// $(window).width() is 884px but window.innerWidth is 900px.
		// (using window.innerWidth also excludes IE < 9)
		respWidth = navigator.userAgent.indexOf('AppleWebKit/') > -1 ? $(window).width() : window.innerWidth;

		if ( respWidth && respWidth < 900 ) {
			if ( body.hasClass('auto-fold') ) {
				body.removeClass('auto-fold').removeClass('folded');
				setUserSetting('unfold', 1);
				setUserSetting('mfold', 'o');
			} else {
				body.addClass('auto-fold');
				setUserSetting('unfold', 0);
			}
		} else {
			if ( body.hasClass('folded') ) {
				body.removeClass('folded');
				setUserSetting('mfold', 'o');
			} else {
				body.addClass('folded');
				setUserSetting('mfold', 'f');
			}
		}
	});

	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';

		// close any open submenus when touch/click is not on the menu
		$(document.body).on( mobileEvent+'.wp-mobile-hover', function(e) {
			if ( !$(e.target).closest('#adminmenu').length )
				menu.find('li.wp-has-submenu.opensub').removeClass('opensub');
		});

		menu.find('a.wp-has-submenu').on( mobileEvent+'.wp-mobile-hover', function(e) {
			var el = $(this), parent = el.parent();

			// 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');
			}
		});
	}

	menu.find('li.wp-has-submenu').hoverIntent({
		over: function(e){
			var b, h, o, f, m = $(this).find('.wp-submenu'), menutop, wintop, maxtop, top = parseInt( m.css('top'), 10 );

			if ( isNaN(top) || top > -5 ) // meaning the submenu is visible
				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 ( f < (b - o) )
				o = b - f;

			if ( o > maxtop )
				o = maxtop;

			if ( o > 1 )
				m.css('margin-top', '-'+o+'px');
			else
				m.css('margin-top', '');

			menu.find('li.menu-top').removeClass('opensub');
			$(this).addClass('opensub');
		},
		out: function(){
			$(this).removeClass('opensub').find('.wp-submenu').css('margin-top', '');
		},
		timeout: 200,
		sensitivity: 7,
		interval: 90
	});

	menu.on('focus.adminmenu', '.wp-submenu a', function(e){
		$(e.target).closest('li.menu-top').addClass('opensub');
	}).on('blur.adminmenu', '.wp-submenu a', function(e){
		$(e.target).closest('li.menu-top').removeClass('opensub');
	});

	// 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') );

	// Init screen meta
	screenMeta.init();

	// check all checkboxes
	$('tbody').children().children('.check-column').find(':checkbox').click( function(e) {
		if ( 'undefined' == e.shiftKey ) { return true; }
		if ( e.shiftKey ) {
			if ( !lastClicked ) { return true; }
			checks = $( lastClicked ).closest( 'form' ).find( ':checkbox' );
			first = checks.index( lastClicked );
			last = checks.index( this );
			checked = $(this).prop('checked');
			if ( 0 < first && 0 < last && first != last ) {
				checks.slice( first, last ).prop( 'checked', function(){
					if ( $(this).closest('tr').is(':visible') )
						return checked;

					return false;
				});
			}
		}
		lastClicked = this;

		// toggle "check all" checkboxes
		var unchecked = $(this).closest('tbody').find(':checkbox').filter(':visible').not(':checked');
		$(this).closest('table').children('thead, tfoot').find(':checkbox').prop('checked', function() {
			return ( 0 == unchecked.length );
		});

		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;

		$(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;
		});

		$(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;
		});
	});

	$('#default-password-nag-no').click( function() {
		setUserSetting('default_password_nag', 'hide');
		$('div.default-password-nag').hide();
		return false;
	});

	// tab in textareas
	$('#newcontent').bind('keydown.wpevent_InsertTab', function(e) {
		var el = e.target, selStart, selEnd, val, scroll, sel;

		if ( e.keyCode == 27 ) { // escape key
			$(el).data('tab-out', true);
			return;
		}

		if ( e.keyCode != 9 || e.ctrlKey || e.altKey || e.shiftKey ) // tab key
			return;

		if ( $(el).data('tab-out') ) {
			$(el).data('tab-out', false);
			return;
		}

		selStart = el.selectionStart;
		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();
			sel.text = '\t';
		} else if ( selStart >= 0 ) {
			scroll = this.scrollTop;
			el.value = val.substring(0, selStart).concat('\t', val.substring(selEnd) );
			el.selectionStart = el.selectionEnd = selStart + 1;
			this.scrollTop = scroll;
		}

		if ( e.stopPropagation )
			e.stopPropagation();
		if ( e.preventDefault )
			e.preventDefault();
	});

	$('#newcontent').bind('blur.wpevent_InsertTab', function(e) {
		if ( this.lastKey && 9 == this.lastKey )
			this.focus();
	});

	if ( pageInput.length ) {
		pageInput.closest('form').submit( function(e){

			// Reset paging var for new filters/searches but not for bulk actions. See #17685.
			if ( $('select[name="action"]').val() == -1 && $('select[name="action2"]').val() == -1 && pageInput.val() == currentPage )
				pageInput.val('1');
		});
	}

	// Scroll into view when focused
	$('#contextual-help-link, #show-settings-link').on( 'focus.scroll-into-view', function(e){
		if ( e.target.scrollIntoView )
			e.target.scrollIntoView(false);
	});

	// Disable upload buttons until files are selected
	(function(){
		var button, input, form = $('form.wp-upload-form');
		if ( ! form.length )
			return;
		button = form.find('input[type="submit"]');
		input = form.find('input[type="file"]');

		function toggleUploadButton() {
			button.prop('disabled', '' === input.map( function() {
				return $(this).val();
			}).get().join(''));
		}
		toggleUploadButton();
		input.on('change', toggleUploadButton);
	})();
});

// 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);