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<title>[38811] trunk/src/wp-includes/js/customize-preview.js: Customize: Split out link `click.preview` and form `submit.preview` event handlers from anonymous functions into named methods on `wp.customize.Preview` for extensibility.</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/38811">38811</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/38811","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>westonruter</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2016-10-19 02:06:00 +0000 (Wed, 19 Oct 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'>Customize: Split out link `click.preview` and form `submit.preview` event handlers from anonymous functions into named methods on `wp.customize.Preview` for extensibility.

See <a href="https://core.trac.wordpress.org/ticket/30937">#30937</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesjscustomizepreviewjs">trunk/src/wp-includes/js/customize-preview.js</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesjscustomizepreviewjs"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/js/customize-preview.js</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/js/customize-preview.js     2016-10-18 20:04:36 UTC (rev 38810)
+++ trunk/src/wp-includes/js/customize-preview.js       2016-10-19 02:06:00 UTC (rev 38811)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -105,100 +105,125 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        preview.add( 'scheme', urlParser.protocol.replace( /:$/, '' ) );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                        preview.body = $( document.body );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
</ins><span class="cx" style="display: block; padding: 0 10px">                         preview.body.on( 'click.preview', 'a', function( event ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                var link, isInternalJumpLink;
-                               link = $( this );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         preview.handleLinkClick( event );
+                       } );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                // No-op if the anchor is not a link.
-                               if ( _.isUndefined( link.attr( 'href' ) ) ) {
-                                       return;
-                               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 preview.body.on( 'submit.preview', 'form', function( event ) {
+                               preview.handleFormSubmit( event );
+                       } );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                isInternalJumpLink = ( '#' === link.attr( 'href' ).substr( 0, 1 ) );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 preview.window = $( window );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                // Allow internal jump links to behave normally without preventing default.
-                               if ( isInternalJumpLink ) {
-                                       return;
-                               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 if ( api.settings.channel ) {
+                               preview.window.on( 'scroll.preview', debounce( function() {
+                                       preview.send( 'scroll', preview.window.scrollTop() );
+                               }, 200 ) );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                // If the link is not previewable, prevent the browser from navigating to it.
-                               if ( ! api.isLinkPreviewable( link[0] ) ) {
-                                       wp.a11y.speak( api.settings.l10n.linkUnpreviewable );
-                                       event.preventDefault();
-                                       return;
-                               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         preview.bind( 'scroll', function( distance ) {
+                                       preview.window.scrollTop( distance );
+                               });
+                       }
+               },
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                // If not in an iframe, then allow the link click to proceed normally since the state query params are added.
-                               if ( ! api.settings.channel ) {
-                                       return;
-                               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         /**
+                * Handle link clicks in preview.
+                *
+                * @since 4.7.0
+                *
+                * @param {jQuery.Event} event Event.
+                */
+               handleLinkClick: function( event ) {
+                       var preview = this, link, isInternalJumpLink;
+                       link = $( event.target );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                // Prevent initiating navigating from click and instead rely on sending url message to pane.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 // No-op if the anchor is not a link.
+                       if ( _.isUndefined( link.attr( 'href' ) ) ) {
+                               return;
+                       }
+
+                       isInternalJumpLink = ( '#' === link.attr( 'href' ).substr( 0, 1 ) );
+
+                       // Allow internal jump links to behave normally without preventing default.
+                       if ( isInternalJumpLink ) {
+                               return;
+                       }
+
+                       // If the link is not previewable, prevent the browser from navigating to it.
+                       if ( ! api.isLinkPreviewable( link[0] ) ) {
+                               wp.a11y.speak( api.settings.l10n.linkUnpreviewable );
</ins><span class="cx" style="display: block; padding: 0 10px">                                 event.preventDefault();
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                return;
+                       }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                /*
-                                * Note the shift key is checked so shift+click on widgets or
-                                * nav menu items can just result on focusing on the corresponding
-                                * control instead of also navigating to the URL linked to.
-                                */
-                               if ( event.shiftKey ) {
-                                       return;
-                               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 // If not in an iframe, then allow the link click to proceed normally since the state query params are added.
+                       if ( ! api.settings.channel ) {
+                               return;
+                       }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                // Note: It's not relevant to send scroll because sending url message will have the same effect.
-                               preview.send( 'url', link.prop( 'href' ) );
-                       } );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 // Prevent initiating navigating from click and instead rely on sending url message to pane.
+                       event.preventDefault();
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        preview.body.on( 'submit.preview', 'form', function( event ) {
-                               var urlParser = document.createElement( 'a' );
-                               urlParser.href = this.action;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 /*
+                        * Note the shift key is checked so shift+click on widgets or
+                        * nav menu items can just result on focusing on the corresponding
+                        * control instead of also navigating to the URL linked to.
+                        */
+                       if ( event.shiftKey ) {
+                               return;
+                       }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                // If the link is not previewable, prevent the browser from navigating to it.
-                               if ( 'GET' !== this.method.toUpperCase() || ! api.isLinkPreviewable( urlParser ) ) {
-                                       wp.a11y.speak( api.settings.l10n.formUnpreviewable );
-                                       event.preventDefault();
-                                       return;
-                               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 // Note: It's not relevant to send scroll because sending url message will have the same effect.
+                       preview.send( 'url', link.prop( 'href' ) );
+               },
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                // If not in an iframe, then allow the form submission to proceed normally with the state inputs injected.
-                               if ( ! api.settings.channel ) {
-                                       return;
-                               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         /**
+                * Handle form submit.
+                *
+                * @since 4.7.0
+                *
+                * @param {jQuery.Event} event Event.
+                */
+               handleFormSubmit: function( event ) {
+                       var preview = this, urlParser, form;
+                       urlParser = document.createElement( 'a' );
+                       form = $( event.target );
+                       urlParser.href = form.prop( 'action' );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                /*
-                                * If the default wasn't prevented already (in which case the form
-                                * submission is already being handled by JS), and if it has a GET
-                                * request method, then take the serialized form data and add it as
-                                * a query string to the action URL and send this in a url message
-                                * to the customizer pane so that it will be loaded. If the form's
-                                * action points to a non-previewable URL, the customizer pane's
-                                * previewUrl setter will reject it so that the form submission is
-                                * a no-op, which is the same behavior as when clicking a link to an
-                                * external site in the preview.
-                                */
-                               if ( ! event.isDefaultPrevented() ) {
-                                       if ( urlParser.search.length > 1 ) {
-                                               urlParser.search += '&';
-                                       }
-                                       urlParser.search += $( this ).serialize();
-                                       api.preview.send( 'url', urlParser.href );
-                               }
-
-                               // Prevent default since navigation should be done via sending url message or via JS submit handler.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 // If the link is not previewable, prevent the browser from navigating to it.
+                       if ( 'GET' !== form.prop( 'method' ).toUpperCase() || ! api.isLinkPreviewable( urlParser ) ) {
+                               wp.a11y.speak( api.settings.l10n.formUnpreviewable );
</ins><span class="cx" style="display: block; padding: 0 10px">                                 event.preventDefault();
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        });
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         return;
+                       }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        preview.window = $( window );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 // If not in an iframe, then allow the form submission to proceed normally with the state inputs injected.
+                       if ( ! api.settings.channel ) {
+                               return;
+                       }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        if ( api.settings.channel ) {
-                               preview.window.on( 'scroll.preview', debounce( function() {
-                                       preview.send( 'scroll', preview.window.scrollTop() );
-                               }, 200 ) );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 /*
+                        * If the default wasn't prevented already (in which case the form
+                        * submission is already being handled by JS), and if it has a GET
+                        * request method, then take the serialized form data and add it as
+                        * a query string to the action URL and send this in a url message
+                        * to the customizer pane so that it will be loaded. If the form's
+                        * action points to a non-previewable URL, the customizer pane's
+                        * previewUrl setter will reject it so that the form submission is
+                        * a no-op, which is the same behavior as when clicking a link to an
+                        * external site in the preview.
+                        */
+                       if ( ! event.isDefaultPrevented() ) {
+                               if ( urlParser.search.length > 1 ) {
+                                       urlParser.search += '&';
+                               }
+                               urlParser.search += form.serialize();
+                               preview.send( 'url', urlParser.href );
+                       }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                preview.bind( 'scroll', function( distance ) {
-                                       preview.window.scrollTop( distance );
-                               });
-                       }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 // Prevent default since navigation should be done via sending url message or via JS submit handler.
+                       event.preventDefault();
</ins><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></span></pre>
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