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<title>[38643] trunk/src/wp-admin/js/postbox.js: Docs: Add documentation for `wp-admin/js/postbox.js`.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/38643">38643</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/38643","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>SergeyBiryukov</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2016-09-22 18:46:34 +0000 (Thu, 22 Sep 2016)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Docs: Add documentation for `wp-admin/js/postbox.js`.

Props atimmer, andizer.
Fixes <a href="https://core.trac.wordpress.org/ticket/37365">#37365</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpadminjspostboxjs">trunk/src/wp-admin/js/postbox.js</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpadminjspostboxjs"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/js/postbox.js</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/js/postbox.js  2016-09-22 14:58:41 UTC (rev 38642)
+++ trunk/src/wp-admin/js/postbox.js    2016-09-22 18:46:34 UTC (rev 38643)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1,11 +1,45 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/**
+ * Contains the postboxes logic, opening and closing postboxes, reordering and saving
+ * the state and ordering to the database.
+ *
+ * @summary Contains postboxes logic
+ *
+ * @since 2.5.0
+ * @requires jQuery
+ */
+
</ins><span class="cx" style="display: block; padding: 0 10px"> /* global ajaxurl, postBoxL10n */
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/**
+ * This object contains all function to handle the behaviour of the post boxes. The post boxes are the boxes you see
+ * around the content on the edit page.
+ *
+ * @since 2.7.0
+ *
+ * @namespace postboxes
+ *
+ * @type {Object}
+ */
</ins><span class="cx" style="display: block; padding: 0 10px"> var postboxes;
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> (function($) {
</span><span class="cx" style="display: block; padding: 0 10px">        var $document = $( document );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        postboxes = {
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+               /**
+                * @summary Handles a click on either the postbox heading or the postbox open/close icon.
+                *
+                * Opens or closes the postbox. Expects `this` to equal the clicked element.
+                * Calls postboxes.pbshow if the postbox has been opened, calls postboxes.pbhide
+                * if the postbox has been closed.
+                *
+                * @since 4.4.0
+                * @memberof postboxes
+                * @fires postboxes#postbox-toggled
+                *
+                * @returns {void}
+                */
</ins><span class="cx" style="display: block; padding: 0 10px">                 handle_click : function () {
</span><span class="cx" style="display: block; padding: 0 10px">                        var $el = $( this ),
</span><span class="cx" style="display: block; padding: 0 10px">                                p = $el.parent( '.postbox' ),
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -41,9 +75,30 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                }
</span><span class="cx" style="display: block; padding: 0 10px">                        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        /**
+                        * @summary Fires when a postbox has been opened or closed.
+                        *
+                        * Contains a jQuery object with the relevant postbox element.
+                        *
+                        * @since 4.0.0
+                        * @event postboxes#postbox-toggled
+                        * @type {Object}
+                        */
</ins><span class="cx" style="display: block; padding: 0 10px">                         $document.trigger( 'postbox-toggled', p );
</span><span class="cx" style="display: block; padding: 0 10px">                },
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                /**
+                * Adds event handlers to all postboxes and screen option on the current page.
+                *
+                * @since 2.7.0
+                * @memberof postboxes
+                *
+                * @param {string} page The page we are currently on.
+                * @param {Object} [args]
+                * @param {Function} args.pbshow A callback that is called when a postbox opens.
+                * @param {Function} args.pbhide A callback that is called when a postbox closes.
+                * @returns {void}
+                */
</ins><span class="cx" style="display: block; padding: 0 10px">                 add_postbox_toggles : function (page, args) {
</span><span class="cx" style="display: block; padding: 0 10px">                        var $handles = $( '.postbox .hndle, .postbox .handlediv' );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -52,16 +107,40 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                        $handles.on( 'click.postboxes', this.handle_click );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        /**
+                        * @since 2.7.0
+                        */
</ins><span class="cx" style="display: block; padding: 0 10px">                         $('.postbox .hndle a').click( function(e) {
</span><span class="cx" style="display: block; padding: 0 10px">                                e.stopPropagation();
</span><span class="cx" style="display: block; padding: 0 10px">                        });
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        /**
+                        * @summary Hides a postbox.
+                        *
+                        * Event handler for the postbox dismiss button. After clicking the button
+                        * the postbox will be hidden.
+                        *
+                        * @since 3.2.0
+                        *
+                        * @returns {void}
+                        */
</ins><span class="cx" style="display: block; padding: 0 10px">                         $( '.postbox a.dismiss' ).on( 'click.postboxes', function( e ) {
</span><span class="cx" style="display: block; padding: 0 10px">                                var hide_id = $(this).parents('.postbox').attr('id') + '-hide';
</span><span class="cx" style="display: block; padding: 0 10px">                                e.preventDefault();
</span><span class="cx" style="display: block; padding: 0 10px">                                $( '#' + hide_id ).prop('checked', false).triggerHandler('click');
</span><span class="cx" style="display: block; padding: 0 10px">                        });
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        /**
+                        * @summary Hides the postbox element
+                        *
+                        * Event handler for the screen options checkboxes. When a checkbox is
+                        * clicked this function will hide or show the relevant postboxes.
+                        *
+                        * @since 2.7.0
+                        * @fires postboxes#postbox-toggled
+                        *
+                        * @returns {void}
+                        */
</ins><span class="cx" style="display: block; padding: 0 10px">                         $('.hide-postbox-tog').bind('click.postboxes', function() {
</span><span class="cx" style="display: block; padding: 0 10px">                                var $el = $(this),
</span><span class="cx" style="display: block; padding: 0 10px">                                        boxId = $el.val(),
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -78,11 +157,24 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                                postboxes.pbhide( boxId );
</span><span class="cx" style="display: block; padding: 0 10px">                                        }
</span><span class="cx" style="display: block; padding: 0 10px">                                }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
</ins><span class="cx" style="display: block; padding: 0 10px">                                 postboxes.save_state( page );
</span><span class="cx" style="display: block; padding: 0 10px">                                postboxes._mark_area();
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+                               /**
+                                * @since 4.0.0
+                                * @see postboxes.handle_click
+                                */
</ins><span class="cx" style="display: block; padding: 0 10px">                                 $document.trigger( 'postbox-toggled', $postbox );
</span><span class="cx" style="display: block; padding: 0 10px">                        });
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        /**
+                        * @summary Changes the amount of columns based on the layout preferences.
+                        *
+                        * @since 2.8.0
+                        *
+                        * @returns {void}
+                        */
</ins><span class="cx" style="display: block; padding: 0 10px">                         $('.columns-prefs input[type="radio"]').bind('click.postboxes', function(){
</span><span class="cx" style="display: block; padding: 0 10px">                                var n = parseInt($(this).val(), 10);
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -93,6 +185,20 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        });
</span><span class="cx" style="display: block; padding: 0 10px">                },
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                /**
+                * @summary Initializes all the postboxes, mainly their sortable behaviour.
+                *
+                * @since 2.7.0
+                * @memberof postboxes
+                *
+                * @param {string} page The page we are currently on.
+                * @param {Object} [args={}] The arguments for the postbox initializer.
+                * @param {Function} args.pbshow A callback that is called when a postbox opens.
+                * @param {Function} args.pbhide A callback that is called when a postbox
+                *                               closes.
+                *
+                * @returns {void}
+                */
</ins><span class="cx" style="display: block; padding: 0 10px">                 init : function(page, args) {
</span><span class="cx" style="display: block; padding: 0 10px">                        var isMobile = $( document.body ).hasClass( 'mobile' ),
</span><span class="cx" style="display: block; padding: 0 10px">                                $handleButtons = $( '.postbox .handlediv' );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -110,12 +216,13 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                tolerance: 'pointer',
</span><span class="cx" style="display: block; padding: 0 10px">                                forcePlaceholderSize: true,
</span><span class="cx" style="display: block; padding: 0 10px">                                helper: function( event, element ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                        // `helper: 'clone'` is equivalent to `return element.clone();`
-                                       // Cloning a checked radio and then inserting that clone next to the original
-                                       // radio unchecks the original radio (since only one of the two can be checked).
-                                       // We get around this by renaming the helper's inputs' name attributes so that,
-                                       // when the helper is inserted into the DOM for the sortable, no radios are
-                                       // duplicated, and no original radio gets unchecked.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                 /* `helper: 'clone'` is equivalent to `return element.clone();`
+                                        * Cloning a checked radio and then inserting that clone next to the original
+                                        * radio unchecks the original radio (since only one of the two can be checked).
+                                        * We get around this by renaming the helper's inputs' name attributes so that,
+                                        * when the helper is inserted into the DOM for the sortable, no radios are
+                                        * duplicated, and no original radio gets unchecked.
+                                        */
</ins><span class="cx" style="display: block; padding: 0 10px">                                         return element.clone()
</span><span class="cx" style="display: block; padding: 0 10px">                                                .find( ':input' )
</span><span class="cx" style="display: block; padding: 0 10px">                                                        .attr( 'name', function( i, currentName ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -157,6 +264,18 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        });
</span><span class="cx" style="display: block; padding: 0 10px">                },
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                /**
+                * @summary Saves the state of the postboxes to the server.
+                *
+                * Saves the state of the postboxes to the server. It sends two lists, one with
+                * all the closed postboxes, one with all the hidden postboxes.
+                *
+                * @since 2.7.0
+                * @memberof postboxes
+                *
+                * @param {string} page The page we are currently on.
+                * @returns {void}
+                */
</ins><span class="cx" style="display: block; padding: 0 10px">                 save_state : function(page) {
</span><span class="cx" style="display: block; padding: 0 10px">                        var closed, hidden;
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -177,6 +296,18 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        });
</span><span class="cx" style="display: block; padding: 0 10px">                },
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                /**
+                * @summary Saves the order of the postboxes to the server.
+                *
+                * Saves the order of the postboxes to the server. Sends a list of all postboxes
+                * inside a sortable area to the server.
+                *
+                * @since 2.8.0
+                * @memberof postboxes
+                *
+                * @param {string} page The page we are currently on.
+                * @returns {void}
+                */
</ins><span class="cx" style="display: block; padding: 0 10px">                 save_order : function(page) {
</span><span class="cx" style="display: block; padding: 0 10px">                        var postVars, page_columns = $('.columns-prefs input:checked').val() || 0;
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -186,12 +317,27 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                page_columns: page_columns,
</span><span class="cx" style="display: block; padding: 0 10px">                                page: page
</span><span class="cx" style="display: block; padding: 0 10px">                        };
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
</ins><span class="cx" style="display: block; padding: 0 10px">                         $('.meta-box-sortables').each( function() {
</span><span class="cx" style="display: block; padding: 0 10px">                                postVars[ 'order[' + this.id.split( '-' )[0] + ']' ] = $( this ).sortable( 'toArray' ).join( ',' );
</span><span class="cx" style="display: block; padding: 0 10px">                        } );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
</ins><span class="cx" style="display: block; padding: 0 10px">                         $.post( ajaxurl, postVars );
</span><span class="cx" style="display: block; padding: 0 10px">                },
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                /**
+                * @summary Marks empty postbox areas.
+                *
+                * Adds a message to empty sortable areas on the dashboard page. Also adds a
+                * border around the side area on the post edit screen if there are no postboxes
+                * present.
+                *
+                * @since 3.3.0
+                * @memberof postboxes
+                * @access private
+                *
+                * @returns {void}
+                */
</ins><span class="cx" style="display: block; padding: 0 10px">                 _mark_area : function() {
</span><span class="cx" style="display: block; padding: 0 10px">                        var visible = $('div.postbox:visible').length, side = $('#post-body #side-sortables');
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -215,6 +361,17 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        }
</span><span class="cx" style="display: block; padding: 0 10px">                },
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                /**
+                * @summary Changes the amount of columns on the post edit page.
+                *
+                * @since 3.3.0
+                * @memberof postboxes
+                * @fires postboxes#postboxes-columnchange
+                * @access private
+                *
+                * @param {number} n The amount of columns to divide the post edit page in.
+                * @returns {void}
+                */
</ins><span class="cx" style="display: block; padding: 0 10px">                 _pb_edit : function(n) {
</span><span class="cx" style="display: block; padding: 0 10px">                        var el = $('.metabox-holder').get(0);
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -222,9 +379,25 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                el.className = el.className.replace(/columns-\d+/, 'columns-' + n);
</span><span class="cx" style="display: block; padding: 0 10px">                        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                        /**
+                        * Fires when the amount of columns on the post edit page has been changed.
+                        *
+                        * @since 4.0.0
+                        * @event postboxes#postboxes-columnchange
+                        */
</ins><span class="cx" style="display: block; padding: 0 10px">                         $( document ).trigger( 'postboxes-columnchange' );
</span><span class="cx" style="display: block; padding: 0 10px">                },
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                /**
+                * @summary Changes the amount of columns the postboxes are in based on the
+                *          current orientation of the browser.
+                *
+                * @since 3.3.0
+                * @memberof postboxes
+                * @access private
+                *
+                * @returns {void}
+                */
</ins><span class="cx" style="display: block; padding: 0 10px">                 _pb_change : function() {
</span><span class="cx" style="display: block; padding: 0 10px">                        var check = $( 'label.columns-prefs-1 input[type="radio"]' );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -247,8 +420,23 @@
</span><span class="cx" style="display: block; padding: 0 10px">                },
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                /* Callbacks */
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+               /**
+                * @since 2.7.0
+                * @memberof postboxes
+                * @access public
+                * @property {Function|boolean} pbshow A callback that is called when a postbox
+                *                                     is opened.
+                */
</ins><span class="cx" style="display: block; padding: 0 10px">                 pbshow : false,
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                /**
+                * @since 2.7.0
+                * @memberof postboxes
+                * @access public
+                * @property {Function|boolean} pbhide A callback that is called when a postbox
+                *                                     is closed.
+                */
</ins><span class="cx" style="display: block; padding: 0 10px">                 pbhide : false
</span><span class="cx" style="display: block; padding: 0 10px">        };
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span></span></pre>
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