1/**
  2 * @file Functionality for the plugin install screens.
  3 *
  4 * @output wp-admin/js/plugin-install.js
  5 */
  6
  7/* global tb_click, tb_remove, tb_position */
  8
  9jQuery( function( $ ) {
 10
 11	var tbWindow,
 12		$iframeBody,
 13		$tabbables,
 14		$firstTabbable,
 15		$lastTabbable,
 16		$focusedBefore = $(),
 17		$uploadViewToggle = $( '.upload-view-toggle' ),
 18		$wrap = $ ( '.wrap' ),
 19		$body = $( document.body );
 20
 21	window.tb_position = function() {
 22		var width = $( window ).width(),
 23			H = $( window ).height() - ( ( 792 < width ) ? 60 : 20 ),
 24			W = ( 792 < width ) ? 772 : width - 20;
 25
 26		tbWindow = $( '#TB_window' );
 27
 28		if ( tbWindow.length ) {
 29			tbWindow.width( W ).height( H );
 30			$( '#TB_iframeContent' ).width( W ).height( H );
 31			tbWindow.css({
 32				'margin-left': '-' + parseInt( ( W / 2 ), 10 ) + 'px'
 33			});
 34			if ( typeof document.body.style.maxWidth !== 'undefined' ) {
 35				tbWindow.css({
 36					'top': '30px',
 37					'margin-top': '0'
 38				});
 39			}
 40		}
 41
 42		return $( 'a.thickbox' ).each( function() {
 43			var href = $( this ).attr( 'href' );
 44			if ( ! href ) {
 45				return;
 46			}
 47			href = href.replace( /&width=[0-9]+/g, '' );
 48			href = href.replace( /&height=[0-9]+/g, '' );
 49			$(this).attr( 'href', href + '&width=' + W + '&height=' + ( H ) );
 50		});
 51	};
 52
 53	$( window ).on( 'resize', function() {
 54		tb_position();
 55	});
 56
 57	/*
 58	 * Custom events: when a Thickbox iframe has loaded and when the Thickbox
 59	 * modal gets removed from the DOM.
 60	 */
 61	$body
 62		.on( 'thickbox:iframe:loaded', tbWindow, function() {
 63			/*
 64			 * Return if it's not the modal with the plugin details iframe. Other
 65			 * thickbox instances might want to load an iframe with content from
 66			 * an external domain. Avoid to access the iframe contents when we're
 67			 * not sure the iframe loads from the same domain.
 68			 */
 69			if ( ! tbWindow.hasClass( 'plugin-details-modal' ) ) {
 70				return;
 71			}
 72
 73			iframeLoaded();
 74		})
 75		.on( 'thickbox:removed', function() {
 76			// Set focus back to the element that opened the modal dialog.
 77			// Note: IE 8 would need this wrapped in a fake setTimeout `0`.
 78			$focusedBefore.trigger( 'focus' );
 79		});
 80
 81	function iframeLoaded() {
 82		var $iframe = tbWindow.find( '#TB_iframeContent' );
 83
 84		// Get the iframe body.
 85		$iframeBody = $iframe.contents().find( 'body' );
 86
 87		// Get the tabbable elements and handle the keydown event on first load.
 88		handleTabbables();
 89
 90		// Set initial focus on the "Close" button.
 91		$firstTabbable.trigger( 'focus' );
 92
 93		/*
 94		 * When the "Install" button is disabled (e.g. the Plugin is already installed)
 95		 * then we can't predict where the last focusable element is. We need to get
 96		 * the tabbable elements and handle the keydown event again and again,
 97		 * each time the active tab panel changes.
 98		 */
 99		$( '#plugin-information-tabs a', $iframeBody ).on( 'click', function() {
100			handleTabbables();
101		});
102
103		// Close the modal when pressing Escape.
104		$iframeBody.on( 'keydown', function( event ) {
105			if ( 27 !== event.which ) {
106				return;
107			}
108			tb_remove();
109		});
110	}
111
112	/*
113	 * Get the tabbable elements and detach/attach the keydown event.
114	 * Called after the iframe has fully loaded so we have all the elements we need.
115	 * Called again each time a Tab gets clicked.
116	 * @todo Consider to implement a WordPress general utility for this and don't use jQuery UI.
117	 */
118	function handleTabbables() {
119		var $firstAndLast;
120		// Get all the tabbable elements.
121		$tabbables = $( ':tabbable', $iframeBody );
122		// Our first tabbable element is always the "Close" button.
123		$firstTabbable = tbWindow.find( '#TB_closeWindowButton' );
124		// Get the last tabbable element.
125		$lastTabbable = $tabbables.last();
126		// Make a jQuery collection.
127		$firstAndLast = $firstTabbable.add( $lastTabbable );
128		// Detach any previously attached keydown event.
129		$firstAndLast.off( 'keydown.wp-plugin-details' );
130		// Attach again the keydown event on the first and last focusable elements.
131		$firstAndLast.on( 'keydown.wp-plugin-details', function( event ) {
132			constrainTabbing( event );
133		});
134	}
135
136	// Constrain tabbing within the plugin modal dialog.
137	function constrainTabbing( event ) {
138		if ( 9 !== event.which ) {
139			return;
140		}
141
142		if ( $lastTabbable[0] === event.target && ! event.shiftKey ) {
143			event.preventDefault();
144			$firstTabbable.trigger( 'focus' );
145		} else if ( $firstTabbable[0] === event.target && event.shiftKey ) {
146			event.preventDefault();
147			$lastTabbable.trigger( 'focus' );
148		}
149	}
150
151	/*
152	 * Open the Plugin details modal. The event is delegated to get also the links
153	 * in the plugins search tab, after the Ajax search rebuilds the HTML. It's
154	 * delegated on the closest ancestor and not on the body to avoid conflicts
155	 * with other handlers, see Trac ticket #43082.
156	 */
157	$( '.wrap' ).on( 'click', '.thickbox.open-plugin-details-modal', function( e ) {
158		// The `data-title` attribute is used only in the Plugin screens.
159		var title = $( this ).data( 'title' ) ?
160			wp.i18n.sprintf(
161				// translators: %s: Plugin name.
162				wp.i18n.__( 'Plugin: %s' ),
163				$( this ).data( 'title' )
164			) :
165			wp.i18n.__( 'Plugin details' );
166
167		e.preventDefault();
168		e.stopPropagation();
169
170		// Store the element that has focus before opening the modal dialog, i.e. the control which opens it.
171		$focusedBefore = $( this );
172
173		tb_click.call(this);
174
175		// Set ARIA role, ARIA label, and add a CSS class.
176		tbWindow
177			.attr({
178				'role': 'dialog',
179				'aria-label': wp.i18n.__( 'Plugin details' )
180			})
181			.addClass( 'plugin-details-modal' );
182
183		// Set title attribute on the iframe.
184		tbWindow.find( '#TB_iframeContent' ).attr( 'title', title );
185	});
186
187	/* Plugin install related JS */
188	$( '#plugin-information-tabs a' ).on( 'click', function( event ) {
189		var tab = $( this ).attr( 'name' );
190		event.preventDefault();
191
192		// Flip the tab.
193		$( '#plugin-information-tabs a.current' ).removeClass( 'current' );
194		$( this ).addClass( 'current' );
195
196		// Only show the fyi box in the description section, on smaller screen,
197		// where it's otherwise always displayed at the top.
198		if ( 'description' !== tab && $( window ).width() < 772 ) {
199			$( '#plugin-information-content' ).find( '.fyi' ).hide();
200		} else {
201			$( '#plugin-information-content' ).find( '.fyi' ).show();
202		}
203
204		// Flip the content.
205		$( '#section-holder div.section' ).hide(); // Hide 'em all.
206		$( '#section-' + tab ).show();
207	});
208
209	/*
210	 * When a user presses the "Upload Plugin" button, show the upload form in place
211	 * rather than sending them to the devoted upload plugin page.
212	 * The `?tab=upload` page still exists for no-js support and for plugins that
213	 * might access it directly. When we're in this page, let the link behave
214	 * like a link. Otherwise we're in the normal plugin installer pages and the
215	 * link should behave like a toggle button.
216	 */
217	if ( ! $wrap.hasClass( 'plugin-install-tab-upload' ) ) {
218		$uploadViewToggle
219			.attr({
220				role: 'button',
221				'aria-expanded': 'false'
222			})
223			.on( 'click', function( event ) {
224				event.preventDefault();
225				$body.toggleClass( 'show-upload-view' );
226				$uploadViewToggle.attr( 'aria-expanded', $body.hasClass( 'show-upload-view' ) );
227			});
228	}
229});
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