/** * @file Contains all dynamic functionality needed on post and term pages. * * @output wp-admin/js/post.js */ /* global ajaxurl, wpAjax, postboxes, pagenow, tinymce, alert, deleteUserSetting, ClipboardJS */ /* global theList:true, theExtraList:true, getUserSetting, setUserSetting, commentReply, commentsBox */ /* global WPSetThumbnailHTML, wptitlehint */ // Backward compatibility: prevent fatal errors. window.makeSlugeditClickable = window.editPermalink = function(){}; // Make sure the wp object exists. window.wp = window.wp || {}; ( function( $ ) { var titleHasFocus = false, __ = wp.i18n.__; /** * Control loading of comments on the post and term edit pages. * * @type {{st: number, get: commentsBox.get, load: commentsBox.load}} * * @namespace commentsBox */ window.commentsBox = { // Comment offset to use when fetching new comments. st : 0, /** * Fetch comments using Ajax and display them in the box. * * @memberof commentsBox * * @param {number} total Total number of comments for this post. * @param {number} num Optional. Number of comments to fetch, defaults to 20. * @return {boolean} Always returns false. */ get : function(total, num) { var st = this.st, data; if ( ! num ) num = 20; this.st += num; this.total = total; $( '#commentsdiv .spinner' ).addClass( 'is-active' ); data = { 'action' : 'get-comments', 'mode' : 'single', '_ajax_nonce' : $('#add_comment_nonce').val(), 'p' : $('#post_ID').val(), 'start' : st, 'number' : num }; $.post( ajaxurl, data, function(r) { r = wpAjax.parseAjaxResponse(r); $('#commentsdiv .widefat').show(); $( '#commentsdiv .spinner' ).removeClass( 'is-active' ); if ( 'object' == typeof r && r.responses[0] ) { $('#the-comment-list').append( r.responses[0].data ); theList = theExtraList = null; $( 'a[className*=\':\']' ).off(); // If the offset is over the total number of comments we cannot fetch any more, so hide the button. if ( commentsBox.st > commentsBox.total ) $('#show-comments').hide(); else $('#show-comments').show().children('a').text( __( 'Show more comments' ) ); return; } else if ( 1 == r ) { $('#show-comments').text( __( 'No more comments found.' ) ); return; } $('#the-comment-list').append(''+wpAjax.broken+''); } ); return false; }, /** * Load the next batch of comments. * * @memberof commentsBox * * @param {number} total Total number of comments to load. */ load: function(total){ this.st = jQuery('#the-comment-list tr.comment:visible').length; this.get(total); } }; /** * Overwrite the content of the Featured Image postbox * * @param {string} html New HTML to be displayed in the content area of the postbox. * * @global */ window.WPSetThumbnailHTML = function(html){ $('.inside', '#postimagediv').html(html); }; /** * Set the Image ID of the Featured Image * * @param {number} id The post_id of the image to use as Featured Image. * * @global */ window.WPSetThumbnailID = function(id){ var field = $('input[value="_thumbnail_id"]', '#list-table'); if ( field.length > 0 ) { $('#meta\\[' + field.attr('id').match(/[0-9]+/) + '\\]\\[value\\]').text(id); } }; /** * Remove the Featured Image * * @param {string} nonce Nonce to use in the request. * * @global */ window.WPRemoveThumbnail = function(nonce){ $.post( ajaxurl, { action: 'set-post-thumbnail', post_id: $( '#post_ID' ).val(), thumbnail_id: -1, _ajax_nonce: nonce, cookie: encodeURIComponent( document.cookie ) }, /** * Handle server response * * @param {string} str Response, will be '0' when an error occurred otherwise contains link to add Featured Image. */ function(str){ if ( str == '0' ) { alert( __( 'Could not set that as the thumbnail image. Try a different attachment.' ) ); } else { WPSetThumbnailHTML(str); } } ); }; /** * Heartbeat locks. * * Used to lock editing of an object by only one user at a time. * * When the user does not send a heartbeat in a heartbeat-time * the user is no longer editing and another user can start editing. */ $(document).on( 'heartbeat-send.refresh-lock', function( e, data ) { var lock = $('#active_post_lock').val(), post_id = $('#post_ID').val(), send = {}; if ( ! post_id || ! $('#post-lock-dialog').length ) return; send.post_id = post_id; if ( lock ) send.lock = lock; data['wp-refresh-post-lock'] = send; }).on( 'heartbeat-tick.refresh-lock', function( e, data ) { // Post locks: update the lock string or show the dialog if somebody has taken over editing. var received, wrap, avatar; if ( data['wp-refresh-post-lock'] ) { received = data['wp-refresh-post-lock']; if ( received.lock_error ) { // Show "editing taken over" message. wrap = $('#post-lock-dialog'); if ( wrap.length && ! wrap.is(':visible') ) { if ( wp.autosave ) { // Save the latest changes and disable. $(document).one( 'heartbeat-tick', function() { wp.autosave.server.suspend(); wrap.removeClass('saving').addClass('saved'); $(window).off( 'beforeunload.edit-post' ); }); wrap.addClass('saving'); wp.autosave.server.triggerSave(); } if ( received.lock_error.avatar_src ) { avatar = $( '', { 'class': 'avatar avatar-64 photo', width: 64, height: 64, alt: '', src: received.lock_error.avatar_src, srcset: received.lock_error.avatar_src_2x ? received.lock_error.avatar_src_2x + ' 2x' : undefined } ); wrap.find('div.post-locked-avatar').empty().append( avatar ); } wrap.show().find('.currently-editing').text( received.lock_error.text ); wrap.find('.wp-tab-first').trigger( 'focus' ); } } else if ( received.new_lock ) { $('#active_post_lock').val( received.new_lock ); } } }).on( 'before-autosave.update-post-slug', function() { titleHasFocus = document.activeElement && document.activeElement.id === 'title'; }).on( 'after-autosave.update-post-slug', function() { /* * Create slug area only if not already there * and the title field was not focused (user was not typing a title) when autosave ran. */ if ( ! $('#edit-slug-box > *').length && ! titleHasFocus ) { $.post( ajaxurl, { action: 'sample-permalink', post_id: $('#post_ID').val(), new_title: $('#title').val(), samplepermalinknonce: $('#samplepermalinknonce').val() }, function( data ) { if ( data != '-1' ) { $('#edit-slug-box').html(data); } } ); } }); }(jQuery)); /** * Heartbeat refresh nonces. */ (function($) { var check, timeout; /** * Only allow to check for nonce refresh every 30 seconds. */ function schedule() { check = false; window.clearTimeout( timeout ); timeout = window.setTimeout( function(){ check = true; }, 300000 ); } $( function() { schedule(); }).on( 'heartbeat-send.wp-refresh-nonces', function( e, data ) { var post_id, $authCheck = $('#wp-auth-check-wrap'); if ( check || ( $authCheck.length && ! $authCheck.hasClass( 'hidden' ) ) ) { if ( ( post_id = $('#post_ID').val() ) && $('#_wpnonce').val() ) { data['wp-refresh-post-nonces'] = { post_id: post_id }; } } }).on( 'heartbeat-tick.wp-refresh-nonces', function( e, data ) { var nonces = data['wp-refresh-post-nonces']; if ( nonces ) { schedule(); if ( nonces.replace ) { $.each( nonces.replace, function( selector, value ) { $( '#' + selector ).val( value ); }); } if ( nonces.heartbeatNonce ) window.heartbeatSettings.nonce = nonces.heartbeatNonce; } }); }(jQuery)); /** * All post and postbox controls and functionality. */ jQuery( function($) { var stamp, visibility, $submitButtons, updateVisibility, updateText, $textarea = $('#content'), $document = $(document), postId = $('#post_ID').val() || 0, $submitpost = $('#submitpost'), releaseLock = true, $postVisibilitySelect = $('#post-visibility-select'), $timestampdiv = $('#timestampdiv'), $postStatusSelect = $('#post-status-select'), isMac = window.navigator.platform ? window.navigator.platform.indexOf( 'Mac' ) !== -1 : false, copyAttachmentURLClipboard = new ClipboardJS( '.copy-attachment-url.edit-media' ), copyAttachmentURLSuccessTimeout, __ = wp.i18n.__, _x = wp.i18n._x; postboxes.add_postbox_toggles(pagenow); /* * Clear the window name. Otherwise if this is a former preview window where the user navigated to edit another post, * and the first post is still being edited, clicking Preview there will use this window to show the preview. */ window.name = ''; // Post locks: contain focus inside the dialog. If the dialog is shown, focus the first item. $('#post-lock-dialog .notification-dialog').on( 'keydown', function(e) { // Don't do anything when [Tab] is pressed. if ( e.which != 9 ) return; var target = $(e.target); // [Shift] + [Tab] on first tab cycles back to last tab. if ( target.hasClass('wp-tab-first') && e.shiftKey ) { $(this).find('.wp-tab-last').trigger( 'focus' ); e.preventDefault(); // [Tab] on last tab cycles back to first tab. } else if ( target.hasClass('wp-tab-last') && ! e.shiftKey ) { $(this).find('.wp-tab-first').trigger( 'focus' ); e.preventDefault(); } }).filter(':visible').find('.wp-tab-first').trigger( 'focus' ); // Set the heartbeat interval to 10 seconds if post lock dialogs are enabled. if ( wp.heartbeat && $('#post-lock-dialog').length ) { wp.heartbeat.interval( 10 ); } // The form is being submitted by the user. $submitButtons = $submitpost.find( ':submit, a.submitdelete, #post-preview' ).on( 'click.edit-post', function( event ) { var $button = $(this); if ( $button.hasClass('disabled') ) { event.preventDefault(); return; } if ( $button.hasClass('submitdelete') || $button.is( '#post-preview' ) ) { return; } // The form submission can be blocked from JS or by using HTML 5.0 validation on some fields. // Run this only on an actual 'submit'. $('form#post').off( 'submit.edit-post' ).on( 'submit.edit-post', function( event ) { if ( event.isDefaultPrevented() ) { return; } // Stop auto save. if ( wp.autosave ) { wp.autosave.server.suspend(); } if ( typeof commentReply !== 'undefined' ) { /* * Warn the user they have an unsaved comment before submitting * the post data for update. */ if ( ! commentReply.discardCommentChanges() ) { return false; } /* * Close the comment edit/reply form if open to stop the form * action from interfering with the post's form action. */ commentReply.close(); } releaseLock = false; $(window).off( 'beforeunload.edit-post' ); $submitButtons.addClass( 'disabled' ); if ( $button.attr('id') === 'publish' ) { $submitpost.find( '#major-publishing-actions .spinner' ).addClass( 'is-active' ); } else { $submitpost.find( '#minor-publishing .spinner' ).addClass( 'is-active' ); } }); }); // Submit the form saving a draft or an autosave, and show a preview in a new tab. $('#post-preview').on( 'click.post-preview', function( event ) { var $this = $(this), $form = $('form#post'), $previewField = $('input#wp-preview'), target = $this.attr('target') || 'wp-preview', ua = navigator.userAgent.toLowerCase(); event.preventDefault(); if ( $this.hasClass('disabled') ) { return; } if ( wp.autosave ) { wp.autosave.server.tempBlockSave(); } $previewField.val('dopreview'); $form.attr( 'target', target ).trigger( 'submit' ).attr( 'target', '' ); // Workaround for WebKit bug preventing a form submitting twice to the same action. // https://bugs.webkit.org/show_bug.cgi?id=28633 if ( ua.indexOf('safari') !== -1 && ua.indexOf('chrome') === -1 ) { $form.attr( 'action', function( index, value ) { return value + '?t=' + ( new Date() ).getTime(); }); } $previewField.val(''); }); // Auto save new posts after a title is typed. if ( $( '#auto_draft' ).val() ) { $( '#title' ).on( 'blur', function() { var cancel; if ( ! this.value || $('#edit-slug-box > *').length ) { return; } // Cancel the auto save when the blur was triggered by the user submitting the form. $('form#post').one( 'submit', function() { cancel = true; }); window.setTimeout( function() { if ( ! cancel && wp.autosave ) { wp.autosave.server.triggerSave(); } }, 200 ); }); } $document.on( 'autosave-disable-buttons.edit-post', function() { $submitButtons.addClass( 'disabled' ); }).on( 'autosave-enable-buttons.edit-post', function() { if ( ! wp.heartbeat || ! wp.heartbeat.hasConnectionError() ) { $submitButtons.removeClass( 'disabled' ); } }).on( 'before-autosave.edit-post', function() { $( '.autosave-message' ).text( __( 'Saving Draft…' ) ); }).on( 'after-autosave.edit-post', function( event, data ) { $( '.autosave-message' ).text( data.message ); if ( $( document.body ).hasClass( 'post-new-php' ) ) { $( '.submitbox .submitdelete' ).show(); } }); /* * When the user is trying to load another page, or reloads current page * show a confirmation dialog when there are unsaved changes. */ $( window ).on( 'beforeunload.edit-post', function( event ) { var editor = window.tinymce && window.tinymce.get( 'content' ); var changed = false; if ( wp.autosave ) { changed = wp.autosave.server.postChanged(); } else if ( editor ) { changed = ( ! editor.isHidden() && editor.isDirty() ); } if ( changed ) { event.preventDefault(); // The return string is needed for browser compat. // See https://developer.mozilla.org/en-US/docs/Web/API/Window/beforeunload_event. return __( 'The changes you made will be lost if you navigate away from this page.' ); } }).on( 'pagehide.edit-post', function( event ) { if ( ! releaseLock ) { return; } /* * Unload is triggered (by hand) on removing the Thickbox iframe. * Make sure we process only the main document unload. */ if ( event.target && event.target.nodeName != '#document' ) { return; } var postID = $('#post_ID').val(); var postLock = $('#active_post_lock').val(); if ( ! postID || ! postLock ) { return; } var data = { action: 'wp-remove-post-lock', _wpnonce: $('#_wpnonce').val(), post_ID: postID, active_post_lock: postLock }; if ( window.FormData && window.navigator.sendBeacon ) { var formData = new window.FormData(); $.each( data, function( key, value ) { formData.append( key, value ); }); if ( window.navigator.sendBeacon( ajaxurl, formData ) ) { return; } } // Fall back to a synchronous POST request. // See https://developer.mozilla.org/en-US/docs/Web/API/Navigator/sendBeacon $.post({ async: false, data: data, url: ajaxurl }); }); // Multiple taxonomies. if ( $('#tagsdiv-post_tag').length ) { window.tagBox && window.tagBox.init(); } else { $('.meta-box-sortables').children('div.postbox').each(function(){ if ( this.id.indexOf('tagsdiv-') === 0 ) { window.tagBox && window.tagBox.init(); return false; } }); } // Handle categories. $('.categorydiv').each( function(){ var this_id = $(this).attr('id'), catAddBefore, catAddAfter, taxonomyParts, taxonomy, settingName; taxonomyParts = this_id.split('-'); taxonomyParts.shift(); taxonomy = taxonomyParts.join('-'); settingName = taxonomy + '_tab'; if ( taxonomy == 'category' ) { settingName = 'cats'; } // @todo Move to jQuery 1.3+, support for multiple hierarchical taxonomies, see wp-lists.js. $('a', '#' + taxonomy + '-tabs').on( 'click', function( e ) { e.preventDefault(); var t = $(this).attr('href'); $(this).parent().addClass('tabs').siblings('li').removeClass('tabs'); $('#' + taxonomy + '-tabs').siblings('.tabs-panel').hide(); $(t).show(); if ( '#' + taxonomy + '-all' == t ) { deleteUserSetting( settingName ); } else { setUserSetting( settingName, 'pop' ); } }); if ( getUserSetting( settingName ) ) $('a[href="#' + taxonomy + '-pop"]', '#' + taxonomy + '-tabs').trigger( 'click' ); // Add category button controls. $('#new' + taxonomy).one( 'focus', function() { $( this ).val( '' ).removeClass( 'form-input-tip' ); }); // On [Enter] submit the taxonomy. $('#new' + taxonomy).on( 'keypress', function(event){ if( 13 === event.keyCode ) { event.preventDefault(); $('#' + taxonomy + '-add-submit').trigger( 'click' ); } }); // After submitting a new taxonomy, re-focus the input field. $('#' + taxonomy + '-add-submit').on( 'click', function() { $('#new' + taxonomy).trigger( 'focus' ); }); /** * Before adding a new taxonomy, disable submit button. * * @param {Object} s Taxonomy object which will be added. * * @return {Object} */ catAddBefore = function( s ) { if ( !$('#new'+taxonomy).val() ) { return false; } s.data += '&' + $( ':checked', '#'+taxonomy+'checklist' ).serialize(); $( '#' + taxonomy + '-add-submit' ).prop( 'disabled', true ); return s; }; /** * Re-enable submit button after a taxonomy has been added. * * Re-enable submit button. * If the taxonomy has a parent place the taxonomy underneath the parent. * * @param {Object} r Response. * @param {Object} s Taxonomy data. * * @return {void} */ catAddAfter = function( r, s ) { var sup, drop = $('#new'+taxonomy+'_parent'); $( '#' + taxonomy + '-add-submit' ).prop( 'disabled', false ); if ( 'undefined' != s.parsed.responses[0] && (sup = s.parsed.responses[0].supplemental.newcat_parent) ) { drop.before(sup); drop.remove(); } }; $('#' + taxonomy + 'checklist').wpList({ alt: '', response: taxonomy + '-ajax-response', addBefore: catAddBefore, addAfter: catAddAfter }); // Add new taxonomy button toggles input form visibility. $('#' + taxonomy + '-add-toggle').on( 'click', function( e ) { e.preventDefault(); $('#' + taxonomy + '-adder').toggleClass( 'wp-hidden-children' ); $('a[href="#' + taxonomy + '-all"]', '#' + taxonomy + '-tabs').trigger( 'click' ); $('#new'+taxonomy).trigger( 'focus' ); }); // Sync checked items between "All {taxonomy}" and "Most used" lists. $('#' + taxonomy + 'checklist, #' + taxonomy + 'checklist-pop').on( 'click', 'li.popular-category > label input[type="checkbox"]', function() { var t = $(this), c = t.is(':checked'), id = t.val(); if ( id && t.parents('#taxonomy-'+taxonomy).length ) { // Fixed for ticket #62504. See https://core.trac.wordpress.org/ticket/62504. $('input#in-' + taxonomy + '-' + id + ', input[id^="in-' + taxonomy + '-' + id + '-"]').prop('checked', c); $('input#in-popular-' + taxonomy + '-' + id).prop('checked', c); } } ); }); // End cats. // Custom Fields postbox. if ( $('#postcustom').length ) { $( '#the-list' ).wpList( { /** * Add current post_ID to request to fetch custom fields * * @ignore * * @param {Object} s Request object. * * @return {Object} Data modified with post_ID attached. */ addBefore: function( s ) { s.data += '&post_id=' + $('#post_ID').val(); return s; }, /** * Show the listing of custom fields after fetching. * * @ignore */ addAfter: function() { $('table#list-table').show(); } }); } /* * Publish Post box (#submitdiv) */ if ( $('#submitdiv').length ) { stamp = $('#timestamp').html(); visibility = $('#post-visibility-display').html(); /** * When the visibility of a post changes sub-options should be shown or hidden. * * @ignore * * @return {void} */ updateVisibility = function() { // Show sticky for public posts. if ( $postVisibilitySelect.find('input:radio:checked').val() != 'public' ) { $('#sticky').prop('checked', false); $('#sticky-span').hide(); } else { $('#sticky-span').show(); } // Show password input field for password protected post. if ( $postVisibilitySelect.find('input:radio:checked').val() != 'password' ) { $('#password-span').hide(); } else { $('#password-span').show(); } }; /** * Make sure all labels represent the current settings. * * @ignore * * @return {boolean} False when an invalid timestamp has been selected, otherwise True. */ updateText = function() { if ( ! $timestampdiv.length ) return true; var attemptedDate, originalDate, currentDate, publishOn, postStatus = $('#post_status'), optPublish = $('option[value="publish"]', postStatus), aa = $('#aa').val(), mm = $('#mm').val(), jj = $('#jj').val(), hh = $('#hh').val(), mn = $('#mn').val(); attemptedDate = new Date( aa, mm - 1, jj, hh, mn ); originalDate = new Date( $('#hidden_aa').val(), $('#hidden_mm').val() -1, $('#hidden_jj').val(), $('#hidden_hh').val(), $('#hidden_mn').val() ); currentDate = new Date( $('#cur_aa').val(), $('#cur_mm').val() -1, $('#cur_jj').val(), $('#cur_hh').val(), $('#cur_mn').val() ); // Catch unexpected date problems. if ( attemptedDate.getFullYear() != aa || (1 + attemptedDate.getMonth()) != mm || attemptedDate.getDate() != jj || attemptedDate.getMinutes() != mn ) { $timestampdiv.find('.timestamp-wrap').addClass('form-invalid'); return false; } else { $timestampdiv.find('.timestamp-wrap').removeClass('form-invalid'); } // Determine what the publish should be depending on the date and post status. if ( attemptedDate > currentDate ) { publishOn = __( 'Schedule for:' ); $('#publish').val( _x( 'Schedule', 'post action/button label' ) ); } else if ( attemptedDate <= currentDate && $('#original_post_status').val() != 'publish' ) { publishOn = __( 'Publish on:' ); $('#publish').val( __( 'Publish' ) ); } else { publishOn = __( 'Published on:' ); $('#publish').val( __( 'Update' ) ); } // If the date is the same, set it to trigger update events. if ( originalDate.toUTCString() == attemptedDate.toUTCString() ) { // Re-set to the current value. $('#timestamp').html(stamp); } else { $('#timestamp').html( '\n' + publishOn + ' ' + // translators: 1: Month, 2: Day, 3: Year, 4: Hour, 5: Minute. __( '%1$s %2$s, %3$s at %4$s:%5$s' ) .replace( '%1$s', $( 'option[value="' + mm + '"]', '#mm' ).attr( 'data-text' ) ) .replace( '%2$s', parseInt( jj, 10 ) ) .replace( '%3$s', aa ) .replace( '%4$s', ( '00' + hh ).slice( -2 ) ) .replace( '%5$s', ( '00' + mn ).slice( -2 ) ) + ' ' ); } // Add "privately published" to post status when applies. if ( $postVisibilitySelect.find('input:radio:checked').val() == 'private' ) { $('#publish').val( __( 'Update' ) ); if ( 0 === optPublish.length ) { postStatus.append(''); } else { optPublish.html( __( 'Privately Published' ) ); } $('option[value="publish"]', postStatus).prop('selected', true); $('#misc-publishing-actions .edit-post-status').hide(); } else { if ( $('#original_post_status').val() == 'future' || $('#original_post_status').val() == 'draft' ) { if ( optPublish.length ) { optPublish.remove(); postStatus.val($('#hidden_post_status').val()); } } else { optPublish.html( __( 'Published' ) ); } if ( postStatus.is(':hidden') ) $('#misc-publishing-actions .edit-post-status').show(); } // Update "Status:" to currently selected status. $('#post-status-display').text( // Remove any potential tags from post status text. wp.sanitize.stripTagsAndEncodeText( $('option:selected', postStatus).text() ) ); // Show or hide the "Save Draft" button. if ( $('option:selected', postStatus).val() == 'private' || $('option:selected', postStatus).val() == 'publish' ) { $('#save-post').hide(); } else { $('#save-post').show(); if ( $('option:selected', postStatus).val() == 'pending' ) { $('#save-post').show().val( __( 'Save as Pending' ) ); } else { $('#save-post').show().val( __( 'Save Draft' ) ); } } return true; }; // Show the visibility options and hide the toggle button when opened. $( '#visibility .edit-visibility').on( 'click', function( e ) { e.preventDefault(); if ( $postVisibilitySelect.is(':hidden') ) { updateVisibility(); $postVisibilitySelect.slideDown( 'fast', function() { $postVisibilitySelect.find( 'input[type="radio"]' ).first().trigger( 'focus' ); } ); $(this).hide(); } }); // Cancel visibility selection area and hide it from view. $postVisibilitySelect.find('.cancel-post-visibility').on( 'click', function( event ) { $postVisibilitySelect.slideUp('fast'); $('#visibility-radio-' + $('#hidden-post-visibility').val()).prop('checked', true); $('#post_password').val($('#hidden-post-password').val()); $('#sticky').prop('checked', $('#hidden-post-sticky').prop('checked')); $('#post-visibility-display').html(visibility); $('#visibility .edit-visibility').show().trigger( 'focus' ); updateText(); event.preventDefault(); }); // Set the selected visibility as current. $postVisibilitySelect.find('.save-post-visibility').on( 'click', function( event ) { // Crazyhorse branch - multiple OK cancels. var visibilityLabel = '', selectedVisibility = $postVisibilitySelect.find('input:radio:checked').val(); $postVisibilitySelect.slideUp('fast'); $('#visibility .edit-visibility').show().trigger( 'focus' ); updateText(); if ( 'public' !== selectedVisibility ) { $('#sticky').prop('checked', false); } switch ( selectedVisibility ) { case 'public': visibilityLabel = $( '#sticky' ).prop( 'checked' ) ? __( 'Public, Sticky' ) : __( 'Public' ); break; case 'private': visibilityLabel = __( 'Private' ); break; case 'password': visibilityLabel = __( 'Password Protected' ); break; } $('#post-visibility-display').text( visibilityLabel ); event.preventDefault(); }); // When the selection changes, update labels. $postVisibilitySelect.find('input:radio').on( 'change', function() { updateVisibility(); }); // Edit publish time click. $timestampdiv.siblings('a.edit-timestamp').on( 'click', function( event ) { if ( $timestampdiv.is( ':hidden' ) ) { $timestampdiv.slideDown( 'fast', function() { $( 'input, select', $timestampdiv.find( '.timestamp-wrap' ) ).first().trigger( 'focus' ); } ); $(this).hide(); } event.preventDefault(); }); // Cancel editing the publish time and hide the settings. $timestampdiv.find('.cancel-timestamp').on( 'click', function( event ) { $timestampdiv.slideUp('fast').siblings('a.edit-timestamp').show().trigger( 'focus' ); $('#mm').val($('#hidden_mm').val()); $('#jj').val($('#hidden_jj').val()); $('#aa').val($('#hidden_aa').val()); $('#hh').val($('#hidden_hh').val()); $('#mn').val($('#hidden_mn').val()); updateText(); event.preventDefault(); }); // Save the changed timestamp. $timestampdiv.find('.save-timestamp').on( 'click', function( event ) { // Crazyhorse branch - multiple OK cancels. if ( updateText() ) { $timestampdiv.slideUp('fast'); $timestampdiv.siblings('a.edit-timestamp').show().trigger( 'focus' ); } event.preventDefault(); }); // Cancel submit when an invalid timestamp has been selected. $('#post').on( 'submit', function( event ) { if ( ! updateText() ) { event.preventDefault(); $timestampdiv.show(); if ( wp.autosave ) { wp.autosave.enableButtons(); } $( '#publishing-action .spinner' ).removeClass( 'is-active' ); } }); // Post Status edit click. $postStatusSelect.siblings('a.edit-post-status').on( 'click', function( event ) { if ( $postStatusSelect.is( ':hidden' ) ) { $postStatusSelect.slideDown( 'fast', function() { $postStatusSelect.find('select').trigger( 'focus' ); } ); $(this).hide(); } event.preventDefault(); }); // Save the Post Status changes and hide the options. $postStatusSelect.find('.save-post-status').on( 'click', function( event ) { $postStatusSelect.slideUp( 'fast' ).siblings( 'a.edit-post-status' ).show().trigger( 'focus' ); updateText(); event.preventDefault(); }); // Cancel Post Status editing and hide the options. $postStatusSelect.find('.cancel-post-status').on( 'click', function( event ) { $postStatusSelect.slideUp( 'fast' ).siblings( 'a.edit-post-status' ).show().trigger( 'focus' ); $('#post_status').val( $('#hidden_post_status').val() ); updateText(); event.preventDefault(); }); } /** * Handle the editing of the post_name. Create the required HTML elements and * update the changes via Ajax. * * @global * * @return {void} */ function editPermalink() { var i, slug_value, slug_label, $el, revert_e, c = 0, real_slug = $('#post_name'), revert_slug = real_slug.val(), permalink = $( '#sample-permalink' ), permalinkOrig = permalink.html(), permalinkInner = $( '#sample-permalink a' ).html(), buttons = $('#edit-slug-buttons'), buttonsOrig = buttons.html(), full = $('#editable-post-name-full'); // Deal with Twemoji in the post-name. full.find( 'img' ).replaceWith( function() { return this.alt; } ); full = full.html(); permalink.html( permalinkInner ); // Save current content to revert to when cancelling. $el = $( '#editable-post-name' ); revert_e = $el.html(); buttons.html( ' ' + '' ); // Save permalink changes. buttons.children( '.save' ).on( 'click', function() { var new_slug = $el.children( 'input' ).val(); if ( new_slug == $('#editable-post-name-full').text() ) { buttons.children('.cancel').trigger( 'click' ); return; } $.post( ajaxurl, { action: 'sample-permalink', post_id: postId, new_slug: new_slug, new_title: $('#title').val(), samplepermalinknonce: $('#samplepermalinknonce').val() }, function(data) { var box = $('#edit-slug-box'); box.html(data); if (box.hasClass('hidden')) { box.fadeIn('fast', function () { box.removeClass('hidden'); }); } buttons.html(buttonsOrig); permalink.html(permalinkOrig); real_slug.val(new_slug); $( '.edit-slug' ).trigger( 'focus' ); wp.a11y.speak( __( 'Permalink saved' ) ); } ); }); // Cancel editing of permalink. buttons.children( '.cancel' ).on( 'click', function() { $('#view-post-btn').show(); $el.html(revert_e); buttons.html(buttonsOrig); permalink.html(permalinkOrig); real_slug.val(revert_slug); $( '.edit-slug' ).trigger( 'focus' ); }); // If more than 1/4th of 'full' is '%', make it empty. for ( i = 0; i < full.length; ++i ) { if ( '%' == full.charAt(i) ) c++; } slug_value = ( c > full.length / 4 ) ? '' : full; slug_label = __( 'URL Slug' ); $el.html( '' + '' ).children( 'input' ).on( 'keydown', function( e ) { var key = e.which; // On [Enter], just save the new slug, don't save the post. if ( 13 === key ) { e.preventDefault(); buttons.children( '.save' ).trigger( 'click' ); } // On [Esc] cancel the editing. if ( 27 === key ) { buttons.children( '.cancel' ).trigger( 'click' ); } } ).on( 'keyup', function() { real_slug.val( this.value ); }).trigger( 'focus' ); } $( '#titlediv' ).on( 'click', '.edit-slug', function() { editPermalink(); }); /** * Adds screen reader text to the title label when needed. * * Use the 'screen-reader-text' class to emulate a placeholder attribute * and hide the label when entering a value. * * @param {string} id Optional. HTML ID to add the screen reader helper text to. * * @global * * @return {void} */ window.wptitlehint = function( id ) { id = id || 'title'; var title = $( '#' + id ), titleprompt = $( '#' + id + '-prompt-text' ); if ( '' === title.val() ) { titleprompt.removeClass( 'screen-reader-text' ); } title.on( 'input', function() { if ( '' === this.value ) { titleprompt.removeClass( 'screen-reader-text' ); return; } titleprompt.addClass( 'screen-reader-text' ); } ); }; wptitlehint(); // Resize the WYSIWYG and plain text editors. ( function() { var editor, offset, mce, $handle = $('#post-status-info'), $postdivrich = $('#postdivrich'); // If there are no textareas or we are on a touch device, we can't do anything. if ( ! $textarea.length || 'ontouchstart' in window ) { // Hide the resize handle. $('#content-resize-handle').hide(); return; } /** * Handle drag event. * * @param {Object} event Event containing details about the drag. */ function dragging( event ) { if ( $postdivrich.hasClass( 'wp-editor-expand' ) ) { return; } if ( mce ) { editor.theme.resizeTo( null, offset + event.pageY ); } else { $textarea.height( Math.max( 50, offset + event.pageY ) ); } event.preventDefault(); } /** * When the dragging stopped make sure we return focus and do a confidence check on the height. */ function endDrag() { var height, toolbarHeight; if ( $postdivrich.hasClass( 'wp-editor-expand' ) ) { return; } if ( mce ) { editor.focus(); toolbarHeight = parseInt( $( '#wp-content-editor-container .mce-toolbar-grp' ).height(), 10 ); if ( toolbarHeight < 10 || toolbarHeight > 200 ) { toolbarHeight = 30; } height = parseInt( $('#content_ifr').css('height'), 10 ) + toolbarHeight - 28; } else { $textarea.trigger( 'focus' ); height = parseInt( $textarea.css('height'), 10 ); } $document.off( '.wp-editor-resize' ); // Confidence check: normalize height to stay within acceptable ranges. if ( height && height > 50 && height < 5000 ) { setUserSetting( 'ed_size', height ); } } $handle.on( 'mousedown.wp-editor-resize', function( event ) { if ( typeof tinymce !== 'undefined' ) { editor = tinymce.get('content'); } if ( editor && ! editor.isHidden() ) { mce = true; offset = $('#content_ifr').height() - event.pageY; } else { mce = false; offset = $textarea.height() - event.pageY; $textarea.trigger( 'blur' ); } $document.on( 'mousemove.wp-editor-resize', dragging ) .on( 'mouseup.wp-editor-resize mouseleave.wp-editor-resize', endDrag ); event.preventDefault(); }).on( 'mouseup.wp-editor-resize', endDrag ); })(); // TinyMCE specific handling of Post Format changes to reflect in the editor. if ( typeof tinymce !== 'undefined' ) { // When changing post formats, change the editor body class. $( '#post-formats-select input.post-format' ).on( 'change.set-editor-class', function() { var editor, body, format = this.id; if ( format && $( this ).prop( 'checked' ) && ( editor = tinymce.get( 'content' ) ) ) { body = editor.getBody(); body.className = body.className.replace( /\bpost-format-[^ ]+/, '' ); editor.dom.addClass( body, format == 'post-format-0' ? 'post-format-standard' : format ); $( document ).trigger( 'editor-classchange' ); } }); // When changing page template, change the editor body class. $( '#page_template' ).on( 'change.set-editor-class', function() { var editor, body, pageTemplate = $( this ).val() || ''; pageTemplate = pageTemplate.substr( pageTemplate.lastIndexOf( '/' ) + 1, pageTemplate.length ) .replace( /\.php$/, '' ) .replace( /\./g, '-' ); if ( pageTemplate && ( editor = tinymce.get( 'content' ) ) ) { body = editor.getBody(); body.className = body.className.replace( /\bpage-template-[^ ]+/, '' ); editor.dom.addClass( body, 'page-template-' + pageTemplate ); $( document ).trigger( 'editor-classchange' ); } }); } // Save on pressing [Ctrl]/[Command] + [S] in the Text editor. $textarea.on( 'keydown.wp-autosave', function( event ) { // Key [S] has code 83. if ( event.which === 83 ) { if ( event.shiftKey || event.altKey || ( isMac && ( ! event.metaKey || event.ctrlKey ) ) || ( ! isMac && ! event.ctrlKey ) ) { return; } wp.autosave && wp.autosave.server.triggerSave(); event.preventDefault(); } }); // If the last status was auto-draft and the save is triggered, edit the current URL. if ( $( '#original_post_status' ).val() === 'auto-draft' && window.history.replaceState ) { var location; $( '#publish' ).on( 'click', function() { location = window.location.href; location += ( location.indexOf( '?' ) !== -1 ) ? '&' : '?'; location += 'wp-post-new-reload=true'; window.history.replaceState( null, null, location ); }); } /** * Copies the attachment URL in the Edit Media page to the clipboard. * * @since 5.5.0 * * @param {MouseEvent} event A click event. * * @return {void} */ copyAttachmentURLClipboard.on( 'success', function( event ) { var triggerElement = $( event.trigger ), successElement = $( '.success', triggerElement.closest( '.copy-to-clipboard-container' ) ); // Clear the selection and move focus back to the trigger. event.clearSelection(); // Show success visual feedback. clearTimeout( copyAttachmentURLSuccessTimeout ); successElement.removeClass( 'hidden' ); // Hide success visual feedback after 3 seconds since last success. copyAttachmentURLSuccessTimeout = setTimeout( function() { successElement.addClass( 'hidden' ); }, 3000 ); // Handle success audible feedback. wp.a11y.speak( __( 'The file URL has been copied to your clipboard' ) ); } ); } ); /** * TinyMCE word count display */ ( function( $, counter ) { $( function() { var $content = $( '#content' ), $count = $( '#wp-word-count' ).find( '.word-count' ), prevCount = 0, contentEditor; /** * Get the word count from TinyMCE and display it */ function update() { var text, count; if ( ! contentEditor || contentEditor.isHidden() ) { text = $content.val(); } else { text = contentEditor.getContent( { format: 'raw' } ); } count = counter.count( text ); if ( count !== prevCount ) { $count.text( count ); } prevCount = count; } /** * Bind the word count update triggers. * * When a node change in the main TinyMCE editor has been triggered. * When a key has been released in the plain text content editor. */ $( document ).on( 'tinymce-editor-init', function( event, editor ) { if ( editor.id !== 'content' ) { return; } contentEditor = editor; editor.on( 'nodechange keyup', _.debounce( update, 1000 ) ); } ); $content.on( 'input keyup', _.debounce( update, 1000 ) ); update(); } ); } )( jQuery, new wp.utils.WordCounter() );

The Invisible Architecture of Randomness and Light in Legacy Games

In the dim glow of retro screens, where every pixel tells a story shaped by hidden logic, random seeds quietly orchestrate the dance of game logic and light. Far from chaotic whim, randomness in legacy engines is rooted in structured variation—pseudo-random sequences that generate unique yet repeatable experiences. This article explores how fixed seeds shape emergent gameplay, how eigenvalues stabilize visual transformations, and how homogeneous coordinates weave mathematical precision into atmospheric lighting—using the iconic Eye of Horus Legacy of Gold Jackpot King as a vivid example of this silent engineering.

The Role of Random Seeds in Shaping Emergent Game Logic

Seed-based randomness lies at the heart of emergent gameplay in classic titles. A seed—a single number or short string—acts as the origin point for deterministic variation within apparent chaos. By initializing pseudo-random number generators (PRNGs) with a fixed seed, developers ensure that every playthrough unfolds from a shared mathematical foundation, yet yields richly diverse outcomes.

“Randomness without structure feels like noise; structure without randomness feels like rigidity.”

Eigenvalues and Light: The Mathematical Backbone of Visual Projection

Visual fidelity in legacy games hinges on precise 3D transformations, where eigenvalues serve as stability markers. These scalar values derived from transformation matrices reveal how vectors scale under rotation, scaling, or shearing—critical for rendering correct lighting and shadow interactions.

In rendering pipelines, light intensity and shadow depth are computed through spectral decomposition—an eigenvalue-driven process that aligns pixel color with surface normals and source directions. This spectral approach ensures shadows fall naturally, simulating real-world light behavior despite limited computational power.

Aspect Eigenvalue Role Visual Impact
Stability marker Prevents distorted or inverted lighting
Spectral decomposition Realistic shadow mapping and falloff
Matrix transformation Accurate light direction and color blending

Homogeneous Coordinates and Perspective: A Bridge Between Math and Illusion

Projecting 3D space onto 2D screens relies on homogeneous coordinates—vectors of the form [x, y, z, w]. This mathematical trick extends linear algebra into geometric projection, enabling seamless depth rendering and camera movement.

Seed-controlled matrix operations dictate how cameras traverse virtual worlds. By adjusting [x, y, z, w] values through seeded transformations, developers shape not only perspective but also how light interacts with surfaces—determining falloff, brightness, and shadow sharpness. Homogeneous coordinates allow the illusion of depth to emerge from discrete mathematical steps.

Eye of Horus Legacy of Gold Jackpot King: A Case Study in Code-Driven Randomness

Eye of Horus Legacy of Gold Jackpot King exemplifies how seeded randomness enriches both gameplay and atmosphere. The game uses fixed seeds to vary enemy placements, loot distribution, and—critically—dynamic lighting effects. Each playthrough unfolds from a unique but consistent random foundation, ensuring no two sessions are identical in feel, yet all remain grounded in structured randomness.

This subtle linkage between code and mood shows how core computer science principles—randomness, eigenvalues, and coordinate systems—shape immersive retro gaming experiences.

The Pigeonhole Principle in Game Design: Unseen Patterns Behind Seeded Chaos

When randomness is bounded by finite seeds, discrete states inevitably repeat—this is the pigeonhole principle in action. In legacy games, limited seed pools generate deterministic yet diverse outcomes, fostering both fairness and replayability. Players rarely notice the repetition, but feel its rhythm: enemy waves feel varied, yet grounded in invisible structure.

This controlled repetition creates predictable patterns that players subconsciously recognize—like the timing of light pulses or shadow shifts—enhancing immersion without sacrificing unpredictability.

Light as a Seed-Dependent Artifact: From Algorithms to Atmosphere

Light in retro games is not merely illumination—it’s a dynamic artifact shaped by seeded algorithms. Eigenvalues govern how light fractures across pixel grids, determining falloff and shadow crispness. Seeded matrices guide these computations, ensuring light behaves consistently across frames while preserving atmospheric nuance.

For instance, a seed value of 42 might trigger warm, soft glows with gradual fade, while 117 produces sharp, cool shadows—all rooted in mathematical eigenstructure. These variations, though limited, enrich atmosphere more than pure randomness ever could.

Light Behavior Factor Seed-Controlled Intensity Smooth fade from bright to dim
Shadow sharpness Controlled by spectral decomposition of matrices
Light color and falloff Tied to eigenvalue decay patterns

Conclusion: Seeds, Logic, and Light as Silent Architects

Randomness in legacy games is not chaos but structured variation—engineered through seeds, eigenvalues, and homogeneous coordinates. These mathematical tools transform randomness into meaningful, repeatable variation that shapes gameplay, lighting, and player perception. Eye of Horus Legacy of Gold Jackpot King stands as a timeless case study, where code and math converge to craft atmospheres that feel alive yet rooted in order.

Understanding these principles reveals that retro aesthetics are not just stylistic—they are the visible result of deep computational logic. Seeds, eigenvalues, and transformation matrices do more than render images; they sculpt the very rhythm and mood of play, proving that behind every pixel and shadow lies a silent architect of experience.

Explore how seeds shape light and logic in Eye of Horus Legacy of Gold Jackpot King

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