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Wanikani Self-Study Quiz

Quiz yourself on Wanikani items

目前为 2023-09-15 提交的版本。查看 最新版本。

  1. // ==UserScript==
  2. // @name        Wanikani Self-Study Quiz
  3. // @namespace   rfindley
  4. // @description Quiz yourself on Wanikani items
  5. // @version     3.1.5
  6. // @match       https://www.wanikani.com/*
  7. // @exclude     https://www.wanikani.com/extra_study/*
  8. // @exclude     https://www.wanikani.com/lesson/*
  9. // @exclude     https://www.wanikani.com/review/*
  10. // @match       https://preview.wanikani.com/*
  11. // @exclude     https://preview.wanikani.com/extra_study/*
  12. // @exclude     https://preview.wanikani.com/lesson/*
  13. // @exclude     https://preview.wanikani.com/review/*
  14. // @require     https://unpkg.com/wanakana@4.0.2/umd/wanakana.min.js
  15. // @copyright   2022+, Robin Findley
  16. // @license     MIT; http://opensource.org/licenses/MIT
  17. // @run-at      document-end
  18. // @grant       none
  19. // ==/UserScript==
  20.  
  21. window.ss_quiz = {};
  22.  
  23. (function(gobj) {
  24.  
  25.     /* global $, wkof, wanakana */
  26.     /* eslint no-multi-spaces: "off" */
  27.  
  28.     //===================================================================
  29.     // Initialization of the Wanikani Open Framework.
  30.     //-------------------------------------------------------------------
  31.     var script_name =  'Self-Study Quiz';
  32.     var wkof_version_needed = '1.1.3';
  33.     if (!window.wkof) {
  34.         if (confirm(script_name+' requires Wanikani Open Framework.\nDo you want to be forwarded to the installation instructions?')) {
  35.             window.location.href = 'https://community.wanikani.com/t/instructions-installing-wanikani-open-framework/28549';
  36.         }
  37.         return;
  38.     }
  39.     if (wkof.version.compare_to(wkof_version_needed) === 'older') {
  40.         if (confirm(script_name+' requires Wanikani Open Framework version '+wkof_version_needed+'.\nDo you want to be forwarded to the update page?')) {
  41.             window.location.href = 'https://gf.qytechs.cn/en/scripts/38582-wanikani-open-framework';
  42.         }
  43.         return;
  44.     }
  45.  
  46.     wkof.include('Jquery,Menu');
  47.     wkof.ready('Jquery,Menu').then(install_menu);
  48.  
  49.     function install_menu() {
  50.         wkof.Menu.insert_script_link({
  51.             name: 'selfstudyquiz',
  52.             submenu: 'Open',
  53.             title: 'Self-Study Quiz',
  54.             on_click: open_quiz
  55.         });
  56.     }
  57.  
  58.     //########################################################################
  59.     // QUIZ SETTINGS DIALOG
  60.     //########################################################################
  61.  
  62.     //========================================================================
  63.     // setup_quiz_settings()
  64.     //------------------------------------------------------------------------
  65.     var quiz_settings_state = 'init';
  66.     function setup_quiz_settings() {
  67.         if (quiz_settings_state === 'init') {
  68.             quiz_settings_state = 'loading';
  69.             return wkof.ready('Settings')
  70.             .then(function(){
  71.                 quiz_settings_state = 'setup';
  72.                 setup_quiz_settings();
  73.             });
  74.         }
  75.         if (quiz_settings_state !== 'setup') return;
  76.  
  77.         var config = {
  78.             script_id: 'ss_quiz',
  79.             title: 'Self-Study Quiz',
  80.             pre_open: preopen_quiz_settings,
  81.             on_save: save_quiz_settings,
  82.             on_close: close_quiz_settings,
  83.             on_refresh: refresh_quiz_settings,
  84.             no_bkgd: true,
  85.             settings: {
  86.                 pg_questions: {type:'page',label:'Questions',hover_tip:'Choose what quiz questions you want to be asked',content:{
  87.                     grp_qpre_list: {type:'group',label:'Presets List',content:{
  88.                         active_qpreset: {type:'list',refresh_on_change:true,hover_tip:'Question Presets',content:{}},
  89.                     }},
  90.                     grp_qpre: {type:'group',label:'Selected Preset',content:{
  91.                         sect_qpre_name: {type:'section',label:'Preset Name'},
  92.                         qpre_name: {type:'text',label:'Edit Preset Name',on_change:refresh_qpresets,path:'@qpresets[@active_qpreset].name',hover_tip:'Enter a name for the selected preset'},
  93.  
  94.                         sect_qpre_question: {type:'section',label:'Questions <span class="fa fa-circle-arrow-right icon-circle-arrow-right"></span> Answers'},
  95.                         char2mean: {type:'checkbox',label:'Rad/Kan/Voc <span class="fa fa-circle-arrow-right icon-circle-arrow-right"></span> Meaning',path:'@qpresets[@active_qpreset].content.char2mean',hover_tip:'Question: A radical or kanji character, or vocab word drawn with kanji\nAnswer: The meaning in English'},
  96.                         char2read: {type:'checkbox',label:'Kan/Voc <span class="fa fa-circle-arrow-right icon-circle-arrow-right"></span> Reading',path:'@qpresets[@active_qpreset].content.char2read',hover_tip:'Question: A kanji character, or vocab word drawn with kanji\nAnswer: The Japanese reading, in hiragana or katakana'},
  97.                         read2mean: {type:'checkbox',label:'Voc Reading <span class="fa fa-circle-arrow-right icon-circle-arrow-right"></span> Meaning',path:'@qpresets[@active_qpreset].content.read2mean',hover_tip:'Question: A kanji or vocab reading, in hiragana or katakana\nAnswer: The meaning in English'},
  98.                         mean2read: {type:'checkbox',label:'Voc Meaning <span class="fa fa-circle-arrow-right icon-circle-arrow-right"></span> Reading',path:'@qpresets[@active_qpreset].content.mean2read',hover_tip:'Question: A vocab word in English\nAnswer: The Japanese reading, in hiragana or katakana'},
  99.                         aud2mean: {type:'checkbox',label:'Voc Audio <span class="fa fa-circle-arrow-right icon-circle-arrow-right"></span> Meaning',path:'@qpresets[@active_qpreset].content.aud2mean',hover_tip:'Question: A vocab word, in spoken audio\nAnswer: The meaning in English'},
  100.                         aud2read: {type:'checkbox',label:'Voc Audio <span class="fa fa-circle-arrow-right icon-circle-arrow-right"></span> Reading',path:'@qpresets[@active_qpreset].content.aud2read',hover_tip:'Question: A vocab word, in spoken audio\nAnswer: The Japanese reading, in hiragana or katakana'},
  101.                     }},
  102.                 }},
  103.                 pg_items: {type:'page',label:'Items',hover_tip:'Choose what items you want to be quizzed on',content:{
  104.                     grp_ipre_list: {type:'group',label:'Presets List',content:{
  105.                         active_ipreset: {type:'list',refresh_on_change:true,hover_tip:'Item Presets',content:{}},
  106.                     }},
  107.                     grp_ipre: {type:'group',label:'Selected Preset',content:{
  108.                         sect_ipre_name: {type:'section',label:'Preset Name'},
  109.                         ipre_name: {type:'text',label:'Edit Preset Name',on_change:refresh_ipresets,path:'@ipresets[@active_ipreset].name',hover_tip:'Enter a name for the selected preset'},
  110.  
  111.                         sect_ipre_srcs: {type:'section',label:'Item Sources'},
  112.                         ipre_srcs: {type:'tabset',content:{}},
  113.                     }},
  114.                 }},
  115.                 pg_opts: {type:'page',label:'Settings',hover_tip:'Configure the user interface settings',content:{
  116.                     grp_quiz_size: {type:'group',label:'Quiz Size',content:{
  117.                         max_quiz_size: {type:'number',label:'Maximum Quiz Size',hover_tip:'Set the approximate maximum quiz size. (0 for unlimited)',default:0},
  118.                     }},
  119.                     grp_synonyms: {type:'group',label:'Synonyms',content:{
  120.                         synonyms_order: {type:'dropdown',label:'Synonym order in Help',hover_tip:'Set the order that synonyms appear in Help hints. (default: First)',default:'first',content:{first:'First',last:'Last'}},
  121.                     }},
  122.                     grp_typos: {type:'group',label:'Typo Tolerance',content:{
  123.                         allow_typos: {type:'checkbox',label:'Allow typos',hover_tip:'When enabled, English answers with minor typos will be accepted.',default:true},
  124.                     }},
  125.                     grp_help: {type:'group',label:'Wrong Answers',content:{
  126.                         autoshow_correct: {type:'checkbox',label:'Auto-show Correct Answer',hover_tip:'Automatically show the correct answer\nwhen you answer incorrectly.',default:false},
  127.                     }},
  128.                     grp_msgs: {type:'group',label:'Warning Messages',content:{
  129.                         show_slightly_off: {type:'checkbox',label:'Answer is slightly off',path:'@messages.show_slightly_off',hover_tip:'Tells you when your answer is slightly off',default:true},
  130.                         show_multi_reading: {type:'checkbox',label:'Has multiple readings',path:'@messages.show_multi_reading',hover_tip:'Tells you when an item has multiple readings',default:false},
  131.                     }},
  132.                     grp_halt: {type:'group',label:'Override Lightning',content:{
  133.                         halt_slightly_off: {type:'checkbox',label:'Halt if slightly off',path:'@messages.halt_slightly_off',hover_tip:'Override lightning mode when your answer is slightly off',default:true},
  134.                         halt_multi_reading: {type:'checkbox',label:'Halt if multiple readings',path:'@messages.halt_multi_reading',hover_tip:'Override lightning mode when an item has multiple readings',default:false},
  135.                     }},
  136.                     grp_audio: {type:'group',label:'Audio',content:{
  137.                         audio_type: {type:'dropdown',label:'Audio file type',hover_tip:'Audio file type (default=mp3)',default:'mp3',content:{mp3:'mp3',ogg:'ogg'}},
  138.                         audio_gender: {type:'dropdown',label:'Speaker',hover_tip:'',default:'rotate',content:{rotate:'Rotate',random:'Random',male:'Male',female:'Female'}},
  139.                     }},
  140.                 }},
  141.             },
  142.         };
  143.  
  144.         populate_items_config(config);
  145.  
  146.         quiz.settings_dialog = new wkof.Settings(config);
  147.         quiz_settings_state = 'ready';
  148.         open_quiz_settings();
  149.     }
  150.  
  151.     //========================================================================
  152.     // preopen_quiz_settings()
  153.     //------------------------------------------------------------------------
  154.     function preopen_quiz_settings(dialog) {
  155.         var btn_grp =
  156.             '<div class="pre_list_btn_grp">'+
  157.             '<button type="button" ref="###" action="new" class="ui-button ui-corner-all ui-widget" title="Create a new preset">New</button>'+
  158.             '<button type="button" ref="###" action="up" class="ui-button ui-corner-all ui-widget" title="Move the selected preset up in the list"><span class="fa fa-arrow-up icon-style"></span></button>'+
  159.             '<button type="button" ref="###" action="down" class="ui-button ui-corner-all ui-widget" title="Move the selected preset down in the list"><span class="fa fa-arrow-down icon-style"></span></button>'+
  160.             '<button type="button" ref="###" action="delete" class="ui-button ui-corner-all ui-widget" title="Delete the selected preset">Delete</button>'+
  161.             '</div>';
  162.  
  163.         var wrap = dialog.find('#ss_quiz_active_qpreset').closest('.row');
  164.         wrap.addClass('pre_list_wrap');
  165.         wrap.prepend(btn_grp.replace(/###/g, 'qpreset'));
  166.         wrap.find('.pre_list_btn_grp').on('click', 'button', preset_button_pressed);
  167.  
  168.         wrap = dialog.find('#ss_quiz_active_ipreset').closest('.row');
  169.         wrap.addClass('pre_list_wrap');
  170.         wrap.prepend(btn_grp.replace(/###/g, 'ipreset'));
  171.         wrap.find('.pre_list_btn_grp').on('click', 'button', preset_button_pressed);
  172.  
  173.         $('#ss_quiz_ipre_srcs .row:first-child').each(function(i,e){
  174.             var row = $(e);
  175.             var right = row.find('>.right');
  176.             row.prepend(right);
  177.             row.addClass('src_enable');
  178.         });
  179.  
  180.         // Customize the item source filters.
  181.         var srcs = $('#ss_quiz_ipre_srcs');
  182.         var flt_grps = srcs.find('.wkof_group');
  183.         flt_grps.addClass('filters');
  184.         var filters = flt_grps.find('.row');
  185.         filters.prepend('<div class="enable"><input type="checkbox"></div>');
  186.         filters.on('change', '.enable input[type="checkbox"]', toggle_filter);
  187.  
  188.         init_settings();
  189.         refresh_qpresets();
  190.         refresh_ipresets();
  191.     }
  192.  
  193.     //========================================================================
  194.     // open_quiz_settings()
  195.     //------------------------------------------------------------------------
  196.     function open_quiz_settings() {
  197.         if (quiz_settings_state !== 'ready') return setup_quiz_settings();
  198.         quiz_settings_state = 'open';
  199.         var backup = {};
  200.         quiz.backup = backup;
  201.         backup.max_quiz_size = quiz.settings.max_quiz_size;
  202.         backup.qpre = JSON.stringify(quiz.settings.qpresets[quiz.settings.active_qpreset].content);
  203.         backup.ipre = JSON.stringify(quiz.settings.ipresets[quiz.settings.active_ipreset].content);
  204.         quiz.settings_dialog.open();
  205.     }
  206.  
  207.     //========================================================================
  208.     // save_quiz_settings()
  209.     //------------------------------------------------------------------------
  210.     function save_quiz_settings(settings) {
  211.         quiz.settings = settings;
  212.         populate_presets($('#ss_quiz_qna'), settings.qpresets, settings.active_qpreset);
  213.         populate_presets($('#ss_quiz_source'), settings.ipresets, settings.active_ipreset);
  214.         var qpre = JSON.stringify(quiz.settings.qpresets[quiz.settings.active_qpreset].content);
  215.         var ipre = JSON.stringify(quiz.settings.ipresets[quiz.settings.active_ipreset].content);
  216.         var reshuffle = (qpre !== quiz.backup.qpre) || (quiz.settings.max_quiz_size !== quiz.backup.max_quiz_size);
  217.         var refetch = (ipre !== quiz.backup.ipre);
  218.         var redraw = (quiz.settings.synonyms_order !== quiz.backup.synonyms_order);
  219.         delete quiz.backup;
  220.         if (refetch) {
  221.             fetch_items().then(quiz.start);
  222.         } else if (reshuffle) {
  223.             quiz.start();
  224.         } else if (redraw) {
  225.             quiz.qinfo.cache = {};
  226.             quiz.ask();
  227.         }
  228.     }
  229.  
  230.     //========================================================================
  231.     // close_quiz_settings()
  232.     //------------------------------------------------------------------------
  233.     function close_quiz_settings(settings) {
  234.         quiz_settings_state = 'setup';
  235.     }
  236.  
  237.     //========================================================================
  238.     // refresh_quiz_settings()
  239.     //------------------------------------------------------------------------
  240.     function refresh_quiz_settings(settings) {
  241.         $('#ss_quiz_ipre_srcs .wkof_group .row').each(function(i,e){
  242.             var row = $(e);
  243.             var panel = row.closest('[role="tabpanel"]');
  244.             var source = panel.attr('id').match(/^ss_quiz_pg_(.*)$/)[1];
  245.             var filter_name = row.find('.setting').attr('name').slice((source+'_flt_').length);
  246.             var preset = quiz.settings.ipresets[quiz.settings.active_ipreset].content;
  247.             var enabled = false;
  248.             try {
  249.                 enabled = preset[source].filters[filter_name].enabled;
  250.             } catch(e) {}
  251.  
  252.             if (enabled) {
  253.                 row.addClass('checked');
  254.             } else {
  255.                 row.removeClass('checked');
  256.             }
  257.             row.find('.enable input[type="checkbox"]').prop('checked', enabled);
  258.         });
  259.     }
  260.  
  261.     //========================================================================
  262.     // refresh_qpresets()
  263.     //------------------------------------------------------------------------
  264.     function refresh_qpresets() {
  265.         var settings = quiz.settings;
  266.         populate_presets($('#ss_quiz_active_qpreset'), settings.qpresets, settings.active_qpreset);
  267.     }
  268.  
  269.     //========================================================================
  270.     // refresh_ipresets()
  271.     //------------------------------------------------------------------------
  272.     function refresh_ipresets() {
  273.         var settings = quiz.settings;
  274.         populate_presets($('#ss_quiz_active_ipreset'), settings.ipresets, settings.active_ipreset);
  275.     }
  276.  
  277.     //========================================================================
  278.     // preset_button_pressed()
  279.     //------------------------------------------------------------------------
  280.     function preset_button_pressed(e) {
  281.         var settings = quiz.settings;
  282.         var ref = e.currentTarget.attributes.ref.value;
  283.         var action = e.currentTarget.attributes.action.value;
  284.         var selected = Number(settings['active_'+ref]);
  285.         var presets = settings[ref+'s'];
  286.         var elem = $('#ss_quiz_active_'+ref);
  287.  
  288.         var dflt;
  289.         if (ref === 'qpreset') {
  290.             dflt = {name:'<untitled>', content:$.extend(true, {}, qpre_defaults)};
  291.         } else {
  292.             dflt = {name:'<untitled>', content:$.extend(true, {}, ipre_defaults)};
  293.         }
  294.  
  295.         switch (action) {
  296.             case 'new':
  297.                 presets.push(dflt);
  298.                 selected = presets.length - 1;
  299.                 settings[ref+'s'] = presets;
  300.                 settings['active_'+ref] = selected;
  301.                 populate_presets(elem, presets, selected);
  302.                 quiz.settings_dialog.refresh();
  303.                 $('#ss_quiz_'+ref.slice(0,4)+'_name').focus().select();
  304.                 break;
  305.  
  306.             case 'up':
  307.                 if (selected <= 0) break;
  308.                 presets = [].concat(presets.slice(0, selected-1), presets[selected], presets[selected-1], presets.slice(selected+1));
  309.                 selected--;
  310.                 settings[ref+'s'] = presets;
  311.                 settings['active_'+ref] = selected;
  312.                 populate_presets(elem, presets, selected);
  313.                 break;
  314.  
  315.             case 'down':
  316.                 if (selected >= presets.length-1) break;
  317.                 presets = [].concat(presets.slice(0, selected), presets[selected+1], presets[selected], presets.slice(selected+2));
  318.                 selected++;
  319.                 settings[ref+'s'] = presets;
  320.                 settings['active_'+ref] = selected;
  321.                 populate_presets(elem, presets, selected);
  322.                 break;
  323.  
  324.             case 'delete':
  325.                 presets = presets.slice(0, selected).concat(presets.slice(selected+1));
  326.                 if (presets.length === 0) presets = [dflt];
  327.                 selected = Math.max(0, selected-1);
  328.                 settings[ref+'s'] = presets;
  329.                 settings['active_'+ref] = selected;
  330.                 populate_presets(elem, presets, selected);
  331.                 quiz.settings_dialog.refresh();
  332.                 break;
  333.         }
  334.     }
  335.  
  336.     //========================================================================
  337.     // init_settings()
  338.     //------------------------------------------------------------------------
  339.     var qpre_defaults = {char2mean:false, char2read:false, read2mean:false, mean2read:false, aud2mean:false, aud2read:false};
  340.     function init_settings() {
  341.         var idx;
  342.         // Merge some defaults
  343.         var defaults = {
  344.             pairing: 'reading_first',
  345.             allow_typos: true,
  346.             play_audio: true,
  347.             mute_audio: false,
  348.             autoshow_correct: false,
  349.             max_quiz_size: 0, // 0 = unlimited
  350.             messages: {
  351.                 show_slightly_off: true,
  352.                 show_multi_reading: false,
  353.                 halt_slightly_off: true,
  354.                 halt_multi_reading: false,
  355.             }
  356.         };
  357.         var settings = $.extend(true, {}, defaults, wkof.settings.ss_quiz);
  358.         wkof.settings.ss_quiz = quiz.settings = settings;
  359.         if (settings.qpresets === undefined) {
  360.             settings.qpresets = [
  361.                 {name:'All Questions', content:{char2mean:true, char2read:true, read2mean:true, mean2read:true, aud2mean:true, aud2read:true}},
  362.                 {name:'Japanese to English', content:{char2mean:true, char2read:true, read2mean:false, mean2read:false, aud2mean:false, aud2read:false}},
  363.                 {name:'English to Japanese', content:{char2mean:false, char2read:false, read2mean:false, mean2read:true, aud2mean:false, aud2read:false}},
  364.                 {name:'Audio Quiz', content:{char2mean:false, char2read:false, read2mean:false, mean2read:false, aud2mean:true, aud2read:true}},
  365.             ];
  366.             settings.active_qpreset = 0;
  367.         }
  368.         for (idx in settings.qpresets) {
  369.             settings.qpresets[idx].content = $.extend(true, {}, qpre_defaults, settings.qpresets[idx].content);
  370.         }
  371.         if (settings.messages === undefined) {
  372.             settings.messages = {show_slightly_off:true, show_multi_reading:false, halt_slightly_off:true, halt_multi_reading:false}
  373.         }
  374.         if (settings.ipresets === undefined) {
  375.             settings.ipresets = [
  376.                 {name:'All Learned Items', content:{wk_items:{enabled:true,filters:{srs:{enabled:true,value:{appr1:true,appr2:true,appr3:true,appr4:true,guru1:true,guru2:true,mast:true,enli:true,burn:true}}}}}},
  377.                 {name:'Apprentice Items', content:{wk_items:{enabled:true,filters:{srs:{enabled:true,value:{appr1:true,appr2:true,appr3:true,appr4:true}}}}}},
  378.                 {name:'Burned Items', content:{wk_items:{enabled:true,filters:{srs:{enabled:true,value:{burn:true}}}}}},
  379.                 {name:'Resurrected Items', content:{wk_items:{enabled:true,filters:{have_burned:{enabled:true,value:true},srs:{enabled:true,value:{appr1:true,appr2:true,appr3:true,appr4:true,guru1:true,guru2:true,mast:true,enli:true}}}}}},
  380.             ];
  381.             settings.active_ipreset = 0;
  382.         }
  383.         if (ipre_defaults) {
  384.             for (idx in settings.ipresets) {
  385.                 settings.ipresets[idx].content = $.extend(true, {}, ipre_defaults, settings.ipresets[idx].content);
  386.             }
  387.         }
  388.     }
  389.  
  390.     //========================================================================
  391.     // populate_items_config()
  392.     //------------------------------------------------------------------------
  393.     var ipre_defaults;
  394.     function populate_items_config(config) {
  395.         var ipre_srcs = config.settings.pg_items.content.grp_ipre.content.ipre_srcs.content;
  396.         var srcs = wkof.ItemData.registry.sources;
  397.         ipre_defaults = {};
  398.         for (var src_name in srcs) {
  399.             var src = srcs[src_name];
  400.             var pg_content = {};
  401.             ipre_srcs['pg_'+src_name] = {type:'page',label:src.description,content:pg_content};
  402.             var settings = {};
  403.             ipre_defaults[src_name] = settings;
  404.             pg_content[src_name+'_enable'] = {
  405.                 type:'checkbox',
  406.                 label:'Include this source',
  407.                 path:'@ipresets[@active_ipreset].content["'+src_name+'"].enabled',
  408.                 hover_tip:'Check to include this data source in the quiz'
  409.             };
  410.             // Enable Wanikani source by default.
  411.             settings.enabled = (src_name === 'wk_items');
  412.  
  413.             // Add 'Options' section.  'wk_items' is handled automatically.
  414.             if (src_name !== 'wk_items') {
  415.                 if (src.options && Object.keys(src.options).length > 0) {
  416.                     settings.options = {};
  417.                     var opt_content = {};
  418.                     pg_content['grp_'+src_name+'_options'] = {type:'group',label:'Options',content:opt_content};
  419.                     for (var opt_name in src.options) {
  420.                         var opt = src.options[opt_name];
  421.                         switch (opt.type) {
  422.                             case 'checkbox':
  423.                                 opt_content[src_name+'_opt_'+opt_name] = {
  424.                                     type:'checkbox',
  425.                                     label:opt.label,
  426.                                     default:opt.default,
  427.                                     hover_tip:opt.hover_tip
  428.                                 }
  429.                                 break;
  430.                         }
  431.                     }
  432.                 }
  433.             }
  434.  
  435.             // Add 'Filters' section.
  436.             if (src.filters && Object.keys(src.filters).length > 0) {
  437.                 settings.filters = {};
  438.                 var flt_content = {};
  439.                 pg_content['grp_'+src_name+'_filters'] = {type:'group',label:'Filters',content:flt_content};
  440.                 for (var flt_name in src.filters) {
  441.                     var flt = src.filters[flt_name];
  442.                     if (flt.no_ui) continue;
  443.                     settings.filters[flt_name] = {enabled:false, value:flt.default};
  444.                     switch (flt.type) {
  445.                         case 'checkbox':
  446.                             flt_content[src_name+'_flt_'+flt_name] = {
  447.                                 type:'checkbox',
  448.                                 label:flt.label,
  449.                                 default:flt.default,
  450.                                 path:'@ipresets[@active_ipreset].content["'+src_name+'"].filters["'+flt_name+'"].value',
  451.                                 validate: flt.validate,
  452.                                 hover_tip:flt.hover_tip
  453.                             }
  454.                             break;
  455.                         case 'multi':
  456.                             var dflt = flt.default;
  457.                             if (typeof flt.filter_value_map === 'function') dflt = flt.filter_value_map(dflt);
  458.                             flt_content[src_name+'_flt_'+flt_name] = {
  459.                                 type:'list',
  460.                                 multi:true,
  461.                                 size:Math.min(4,Object.keys(flt.content).length),
  462.                                 label:flt.label,
  463.                                 content:flt.content,
  464.                                 default:dflt,
  465.                                 path:'@ipresets[@active_ipreset].content["'+src_name+'"].filters["'+flt_name+'"].value',
  466.                                 validate: flt.validate,
  467.                                 hover_tip:flt.hover_tip
  468.                             }
  469.                             settings.filters[flt_name].value = dflt;
  470.                             break;
  471.                         case 'text':
  472.                         case 'number':
  473.                         case 'input':
  474.                             flt_content[src_name+'_flt_'+flt_name] = {
  475.                                 type:flt.type,
  476.                                 label:flt.label,
  477.                                 placeholder:flt.placeholder,
  478.                                 default:flt.default,
  479.                                 path:'@ipresets[@active_ipreset].content["'+src_name+'"].filters["'+flt_name+'"].value',
  480.                                 validate: flt.validate,
  481.                                 hover_tip:flt.hover_tip
  482.                             }
  483.                             break;
  484.                         case 'button':
  485.                             flt_content[src_name+'_flt_'+flt_name] = {
  486.                                 type:flt.type,
  487.                                 label:flt.label,
  488.                                 on_click:flt.on_click,
  489.                                 validate: flt.validate,
  490.                                 hover_tip:flt.hover_tip
  491.                             }
  492.                             break;
  493.                     }
  494.                 }
  495.             }
  496.         }
  497.     }
  498.  
  499.     //========================================================================
  500.     // toggle_filter()
  501.     //------------------------------------------------------------------------
  502.     function toggle_filter(e) {
  503.         var row = $(e.delegateTarget);
  504.         var panel = row.closest('[role="tabpanel"]');
  505.         var source = panel.attr('id').match(/^ss_quiz_pg_(.*)$/)[1];
  506.         var enabled = row.find('.enable input[type="checkbox"]').prop('checked');
  507.         var preset = quiz.settings.ipresets[quiz.settings.active_ipreset].content;
  508.         var filter_name = row.find('.setting').attr('name').slice((source+'_flt_').length);
  509.  
  510.         if (enabled) {
  511.             row.addClass('checked');
  512.         } else {
  513.             row.removeClass('checked');
  514.         }
  515.         try {
  516.             preset[source].filters[filter_name].enabled = enabled;
  517.         } catch(e) {}
  518.     }
  519.  
  520.     //########################################################################
  521.     // QUIZ DIALOG
  522.     //########################################################################
  523.  
  524.     //========================================================================
  525.     // install_css()
  526.     //------------------------------------------------------------------------
  527.     function install_css() {
  528.         $('head').append(`
  529.             <style id="ss_quiz_css" type="text/css">
  530.             .noselect {-webkit-touch-callout:none; -webkit-user-select:none; -khtml-user-select:none; -moz-user-select: none; -ms-user-select:none; user-select: none;}
  531.  
  532.             #ss_quiz [lang="ja"] {font-family: "Meiryo","Yu Gothic","Hiragino Kaku Gothic Pro","TakaoPGothic","Yu Gothic","ヒラギノ角ゴ Pro W3","メイリオ","Osaka","MS PGothic","ＭＳ Ｐゴシック",sans-serif;}
  533.             #ss_quiz {position:fixed; z-index:12001; width:573px; background-color:#000; border-radius:8px; border:8px solid rgba(0,0,0,0.85); font-size:16px; line-height:16px; font-family:"Helvetica Neue", Helvetica, Arial, sans-serif;}
  534.             #ss_quiz * {text-align:center;}
  535.  
  536.             #ss_quiz .titlebar {cursor:move; text-align:left; padding-bottom:4px; font-size:1.125em; font-weight:bold; line-height:1.125em; background-color:rgba(0,0,0,0.85); color:#ddd;}
  537.             #ss_quiz .titlebar .button {display:inline-block; float:right; height:20px; width:20px; line-height:1em; cursor:pointer; border:1px solid rgba(255,255,255,0.2); border-radius:4px;}
  538.  
  539.             #ss_quiz .prev, #ss_quiz .next {display:inline-block; width:80px; color:#fff; line-height:8em; cursor:pointer;}
  540.             #ss_quiz .prev:hover {background-image:linear-gradient(to left, rgba(0,0,0,0), rgba(0,0,0,0.2));}
  541.             #ss_quiz .next:hover {background-image:linear-gradient(to right, rgba(0,0,0,0), rgba(0,0,0,0.2));}
  542.             #ss_quiz .prev {float:left;}
  543.             #ss_quiz .next {float:right;}
  544.  
  545.             #ss_quiz .cfgbar {background-color:rgba(32,32,32,0.85); padding:4px 0; border-bottom:1px solid #444;white-space:nowrap;}
  546.             #ss_quiz .cfgbar select {margin:0; background:transparent; color:rgba(255,255,255,0.5); border:1px solid #777; width:248px; height:2em; text-align:left; font-size:0.875em; border-radius:4px; padding:4px 6px;}
  547.             #ss_quiz .cfgbar option {color:#000;}
  548.             #ss_quiz .cfgbar .button {display:inline-block; width:24px; height:24px; cursor:pointer; color:#777; font-size:24px; vertical-align:middle;}
  549.             #ss_quiz .cfgbar .button:hover {color:#ccc;}
  550.  
  551.             #ss_quiz .statusbar {line-height:1em; color:rgba(255,255,255,0.5); background-color:rgba(32,32,32,0.85);}
  552.  
  553.             #ss_quiz .settings {float:left; padding:6px 8px; text-align:left; line-height:1.5em; font-size:0.875em;}
  554.             #ss_quiz .settings span[class*="icon-"] {font-size:1.3em; padding:0 2px;}
  555.             #ss_quiz .settings .ss_audio {padding-left:0; padding-right:4px;}
  556.             #ss_quiz .settings .ss_done {font-size:1.25em;}
  557.             #ss_quiz .settings .ss_pair {font-weight:bold;}
  558.             #ss_quiz .settings span {cursor:pointer;}
  559.             #ss_quiz .settings > span:hover {color:rgba(255,255,204,0.8);}
  560.             #ss_quiz .settings span.active {color:#ffc;}
  561.  
  562.             #ss_quiz .stats_labels {text-align:right; font-family:monospace; font-size:14px; line-height:14px; white-space:pre;}
  563.             #ss_quiz .stats {float:right; text-align:right; color:rgba(255,255,255,0.8); font-family:monospace; padding:0 5px;}
  564.  
  565.             #ss_quiz .fa-audio:before {content:"\\f028";}
  566.  
  567.             #ss_quiz .ss_audio {display:inline-block;box-sizing:border-box;width:22px;text-align:left}
  568.             #ss_quiz .ss_audio:before {content:"\\f026";}
  569.             #ss_quiz .ss_audio.active:before {content:"\\f028";}
  570.             #ss_quiz .ss_audio.mute {color:rgba(255,0,0,0.8);}
  571.             #ss_quiz .ss_audio.mute:hover {color:rgba(255,127,127,0.8);}
  572.  
  573.             #ss_quiz[data-qtype="characters"] .question {font-size:2em;}
  574.             #ss_quiz .question svg.radical {width:1em;height:1em;stroke:#fff;stroke-width:68;stroke-linecap:square;stroke-miterlimit:2;fill:none;}
  575.             #ss_quiz .question svg.radical * {stroke:#fff;}
  576.  
  577.             #ss_quiz .atype {font-size:1.75em; line-height:2em; cursor:default; color:#fff; border-top:1px solid #000; border-bottom:1px solid #000;}
  578.             #ss_quiz[data-atype="reading"] .atype {color:#fff; text-shadow:-1px -1px 0 #000; border-top:1px solid #555; border-bottom:1px solid #000; background-color:#2e2e2e; background-image:linear-gradient(to bottom, #3c3c3c, #1a1a1a); background-repeat:repeat-x;}
  579.             #ss_quiz[data-atype="meaning"] .atype {color:#555; text-shadow:-1px -1px 0 rgba(255,255,255,0.1); border-top:1px solid #d5d5d5; border-bottom:1px solid #c8c8c8; background-color:#e9e9e9; background-image:linear-gradient(to bottom, #eee, #e1e1e1); background-repeat:repeat-x;}
  580.  
  581.             #ss_quiz .help {display:none;
  582.               position:absolute; top:3%; left:13%; width:74%; box-sizing:border-box; border:2px solid #000; border-radius:15px; padding:4px;
  583.               color:#555; text-shadow:2px 2px 0 rgba(0,0,0,0.13); background-color:rgba(255,255,255,0.9); font-size:0.8em; line-height:1.2em;
  584.             }
  585.             #ss_quiz.help .help {display:inherit;}
  586.  
  587.             #ss_quiz .message {visibility:hidden;
  588.               position:absolute; bottom:3%; left:13%; width:74%; box-sizing:border-box; border:2px solid #000; border-radius:15px; padding:4px;
  589.               color:#555; text-shadow:2px 2px 0 rgba(0,0,0,0.13); background-color:rgba(255,255,255,0.9); font-size:0.6em; line-height:1.2em; opacity:0; transition:visibility 0.25s, opacity 0.25s linear;
  590.             }
  591.             #ss_quiz.message .message {visibility:visible; opacity:1; transition:visibility 0s, opacity 0.25s linear;}
  592.  
  593.             #wkof_ds #ss_quiz .answer {font-size:1.75em; background-color:#ddd; padding:8px;}
  594.             #wkof_ds #ss_quiz .answer input {
  595.               width:100%; background-color:#fff; height:2em; margin:0; border:2px solid #000; padding:0;
  596.               box-sizing:border-box; border-radius:0; font-size:1em;
  597.             }
  598.             #wkof_ds #ss_quiz[data-result="correct"] .answer input {color:#fff; background-color:#8c8; text-shadow:2px 2px 0 rgba(0,0,0,0.2);}
  599.             #wkof_ds #ss_quiz[data-result="incorrect"] .answer input {color:#fff; background-color:#f03; text-shadow:2px 2px 0 rgba(0,0,0,0.2);}
  600.  
  601.             #ss_quiz .btn.requiz {position:absolute; top:6px; right:6px; padding-left:6px; padding-right:6px;}
  602.  
  603.             #ss_quiz .qwrap {height:8em; position:relative; clear:both; font-size:1.75em}
  604.             #ss_quiz[data-itype="radical"] .qwrap, #ss_quiz .summary .que[title~="Radical"] {background-color:var(--color-radical);}
  605.             #ss_quiz[data-itype="kanji"] .qwrap, #ss_quiz .summary .que[title~="Kanji"] {background-color:var(--color-kanji);}
  606.             #ss_quiz[data-itype="vocabulary"] .qwrap, #ss_quiz .summary .que[title~="Vocabulary"] {background-color:var(--color-vocabulary);}
  607.             #ss_quiz[data-itype="kana_vocabulary"] .qwrap, #ss_quiz .summary .que[title~="Vocabulary"] {background-color:var(--color-vocabulary);}
  608.  
  609.             #ss_quiz .qwrap > .center {display:none; position:absolute; top:50%; left:50%; transform:translate(-50%,-50%);}
  610.  
  611.             #ss_quiz[data-mode="loading"] .qwrap {background-color:#ccc; opacity:0.5;}
  612.             #wkof_ds #ss_quiz[data-mode="loading"] .answer {opacity:0.5;}
  613.  
  614.             #ss_quiz[data-mode="question"] .question {display:block;}
  615.             #ss_quiz .question {overflow-x:auto; overflow-y:hidden; color:#fff; text-align:center; line-height:1.1em; font-size:1em; cursor:default;}
  616.             #ss_quiz .question .fa-audio {font-size:2.5em; cursor:pointer;}
  617.  
  618.             #ss_quiz[data-mode="summary"] .summary {display:block;}
  619.             #ss_quiz .summary {display:none; position:absolute; width:74%; height:100%; background-color:rgba(0,0,0,0.7); color:#fff; font-weight:bold;}
  620.             #ss_quiz .summary h3 {
  621.               background-image:linear-gradient(to bottom, #3c3c3c, #1a1a1a); background-repeat:repeat-x;
  622.               border-top:1px solid #777; border-bottom:1px solid #000; margin:0; box-sizing:border-box;
  623.               text-shadow:2px 2px 0 rgba(0,0,0,0.5); color:#fff; font-size:0.8em; font-weight:bold; line-height:40px;
  624.             }
  625.             #ss_quiz .summary .errors {position:absolute; top:40px; bottom:0px; width:100%; margin:0; overflow-y:auto; list-style-type:none;}
  626.             #ss_quiz .summary li {margin:4px 0 0 0; font-size:0.6em; font-weight:bold; line-height:1.4em;}
  627.  
  628.             #ss_quiz .summary .errors span {display:inline-block; padding:2px 4px 0px 4px; border-radius:4px; line-height:1.1em; max-width:50%; vertical-align:middle; cursor:pointer;}
  629.             #ss_quiz .errors .fa-long-arrow-right {padding:0px 8px;}
  630.             #ss_quiz .summary .ans {background-color:#fff; color:#000;}
  631.             #ss_quiz .summary .wrong {color:#f22;}`+
  632.  
  633.  
  634.             //--[ Settings dialog ]-------------------------------------------
  635.             `#wkof_ds div[role="dialog"][aria-describedby="wkofs_ss_quiz"] {z-index:12002;}
  636.  
  637.             #wkofs_ss_quiz.wkof_settings .pre_list_btn_grp {width:60px;float:left;margin-right:2px;}
  638.             #wkofs_ss_quiz.wkof_settings .pre_list_btn_grp button {width:100%; padding:2px 0;}
  639.             #wkofs_ss_quiz.wkof_settings .pre_list_btn_grp button:not(:last-child) {margin-bottom:2px;}
  640.             #wkofs_ss_quiz.wkof_settings .pre_list_wrap {display:flex;}
  641.             #wkofs_ss_quiz.wkof_settings .pre_list_wrap .right {flex:1;}
  642.             #wkofs_ss_quiz.wkof_settings .pre_list_wrap .list {overflow:auto;height:100%;}
  643.  
  644.             #wkofs_ss_quiz.wkof_settings .filters .row {border-top:1px solid #ccc; padding:6px 4px; margin-bottom:0;}
  645.             #wkofs_ss_quiz.wkof_settings .filters .row:not(.checked) {padding-top:0px;padding-bottom:0px;}
  646.             #wkofs_ss_quiz .filters .row .enable input[type="checkbox"] {margin:0;}
  647.             #wkofs_ss_quiz.narrow .filters .row.checked .right input[type="checkbox"]:after {content:"⇐yes?";margin-left:28px;line-height:30px;}
  648.             #wkofs_ss_quiz .filters .row.checked {background-color:#f7f7f7;}
  649.             #wkofs_ss_quiz .filters .row:not(.checked) {opacity:0.5;}
  650.             #wkofs_ss_quiz .filters .row .enable {display:inline; margin:0; float:left;}
  651.             #wkofs_ss_quiz:not(.narrow) .filters .left {width:170px;}
  652.  
  653.             #wkofs_ss_quiz .filters .row .enable input[type="checkbox"] {margin:0 4px 0 0;}
  654.             #wkofs_ss_quiz .filters .row:not(.checked) .right {display:none;}
  655.             #wkofs_ss_quiz .filters .row:not(.checked) .left label {text-align:left;}
  656.             #wkofs_ss_quiz.narrow .filters .row .left {width:initial;}
  657.             #wkofs_ss_quiz.narrow .filters .row .left label {line-height:30px;}
  658.             #wkofs_ss_quiz #ss_quiz_ipre_srcs .src_enable .left {width:initial;}
  659.             #wkofs_ss_quiz #ss_quiz_ipre_srcs .src_enable .left label {text-align:left;width:initial;line-height:30px;}
  660.             #wkofs_ss_quiz #ss_quiz_ipre_srcs .src_enable .right {float:left; margin:0 4px;width:initial;}`+
  661.             //----------------------------------------------------------------
  662.  
  663.             '</style>'
  664.         );
  665.     }
  666.  
  667.     //========================================================================
  668.     // open_quiz()
  669.     //------------------------------------------------------------------------
  670.     var quiz_setup_state = 'init';
  671.     function open_quiz(custom_options) {
  672.         if (quiz_setup_state === 'init') {
  673.             quiz_setup_state = 'loading';
  674.             install_css();
  675.             wkof.include('ItemData, Settings');
  676.             wkof.ready('ItemData, Settings').then(function(){
  677.                 return wkof.Settings.load('ss_quiz');
  678.             }).then(function(){
  679.                 quiz_setup_state = 'ready';
  680.                 init_settings();
  681.                 open_quiz(custom_options);
  682.             });
  683.         }
  684.         if (quiz_setup_state !== 'ready') return;
  685.  
  686.         var quiz_html =
  687.             '<div id="ss_quiz" class="dialog" data-itype="loading" data-atype="meaning" data-mode="question">'+
  688.             '  <div class="titlebar noselect">Self-Study Quiz<span class="button" title="Close the quiz.\nHotkey: Rapid triple-tap [Esc]">x</span></div>'+
  689.             '  <div class="cfgbar">'+
  690.             '    <select id="ss_quiz_qna" title="Choose what quiz questions you want to be asked"></select>'+
  691.             '    <select id="ss_quiz_source" title="Choose what items you want to be quizzed on"></select>'+
  692.             '    <span class="fa fa-repeat icon-style shuffle button" title="Shuffle Quiz (Ctrl-S)\nDouble-click to reset Round counter"></span>'+
  693.             '    <span class="fa fa-cog icon-style config button" title="Configure presets"></span>'+
  694.             '  </div>'+
  695.             '  <div class="statusbar">'+
  696.             '    <div class="settings noselect">'+
  697.             '      <span class="fa fa-bolt icon-style ss_lightning" title="Lightning Mode: Skip <enter> on correct answers (Ctrl-L)"></span>'+
  698.             '      <span class="fa fa-audio icon-style ss_audio" title="Toggle when to play audio (Ctrl-Shift-A)\n* Red = Never play audio\n* Gray = Audio questions only\n* Yellow = Audio questions, After correct reading, Opening help for reading\n\nTo play audio immediately, press (Ctrl-A)"></span>'+
  699.             '      <span class="fa fa-question icon-style ss_help" title="Help: Peek at item info (F1, Ctrl-H, or ?)"></span>'+
  700.             '      <span class="fa fa-step-forward icon-style ss_done" title="End the quiz and show summary (Esc or Ctrl-E)"></span><br />'+
  701.             '      <span class="ss_pair" title="Pairing mode: Group reading and meaning together (Ctrl-P)">Pairing: <span class="data">Disabled</span></span>'+
  702.             '    </div>'+
  703.             '    <div class="stats"></div>'+
  704.             '    <div class="stats_labels">Round:<br>Remaining:<br>Correct:<br>Incorrect:</div>'+
  705.             '  </div>'+
  706.             '  <div class="qwrap">'+
  707.             '    <div class="prev" title="Previous question (Ctrl-Left)"><i class="fa fa-chevron-left icon-style"></i></div>'+
  708.             '    <div class="next" title="Next question (Ctrl-Right)"><i class="fa fa-chevron-right icon-style"></i></div>'+
  709.             '    <div class="question center"></div>'+
  710.             '    <div class="help"></div>'+
  711.             '    <div class="message"></div>'+
  712.             '    <div class="summary center">'+
  713.             '      <h3>Summary - <span class="percent">100%</span> Correct <button class="btn requiz" title="Re-quiz wrong items">Re-quiz</button></h3>'+
  714.             '      <ul class="errors"></ul>'+
  715.             '    </div>'+
  716.             '  </div>'+
  717.             '  <div class="atype">Loading...</div>'+
  718.             '  <div class="answer"><input type="text" lang="en" value=""></div>'+
  719.             '</div>';
  720.  
  721.         if (quiz.dialog) quiz.close();
  722.         var dialog = (quiz.dialog = $(quiz_html));
  723.  
  724.         var settings = quiz.settings;
  725.         init_custom_options(custom_options);
  726.         populate_presets(dialog.find('#ss_quiz_qna'), settings.qpresets, settings.active_qpreset);
  727.         populate_presets(dialog.find('#ss_quiz_source'), settings.ipresets, settings.active_ipreset);
  728.  
  729.         wkof.Settings.background.open();
  730.         $('#wkof_ds').append(dialog);
  731.  
  732.         dialog.css('top', Math.max(0,Math.floor((window.innerHeight - dialog.outerHeight()) / 2)));
  733.         dialog.css('left', Math.floor((window.innerWidth - dialog.outerWidth()) / 2));
  734.  
  735.         // Initialize settings
  736.         var settings_bar = dialog.find('.statusbar .settings');
  737.         if (settings.lightning_mode === true) settings_bar.find('.ss_lightning').addClass('active');
  738.         if (settings.repeat_quiz === true) settings_bar.find('.ss_repeat').addClass('active');
  739.         if (settings.shuffle_on_repeat === true) settings_bar.find('.ss_shuffle').addClass('active');
  740.         if (settings.play_audio === true) settings_bar.find('.ss_audio').addClass('active');
  741.         if (settings.mute_audio === true) settings_bar.find('.ss_audio').addClass('mute');
  742.         toggle_pairing(null, true /* initialize */);
  743.  
  744.         // Events
  745.         dialog.find('.settings .ss_lightning').on('click', toggle_lightning);
  746.         dialog.find('.settings .ss_audio').on('click', toggle_audio);
  747.         dialog.find('.settings .ss_help').on('click', toggle_help);
  748.         dialog.find('.settings .ss_pair').on('click', toggle_pairing);
  749.         dialog.find('.settings .ss_done').on('click', process_escape);
  750.         dialog.find('.prev').on('click', quiz.prev);
  751.         dialog.find('.next').on('click', quiz.next);
  752.         dialog.find('.titlebar').on('mousedown touchstart', drag);
  753.         dialog.find('.cfgbar .button.shuffle').on('click', manual_shuffle);
  754.         dialog.find('.cfgbar .button.config').on('click', open_quiz_settings);
  755.         dialog.find('.titlebar .button').on('click', close_quiz);
  756.         dialog.find('.summary .requiz').on('click', quiz.requiz);
  757.         dialog.find('.question').on('click', '.fa-audio', play_audio.bind(null,true,null));
  758.         $('#ss_quiz_qna').on('change', qpreset_changed);
  759.         $('#ss_quiz_source').on('change', ipreset_changed);
  760.         $('body').on('keydown.ss_quiz_key keypress.ss_quiz_key', quiz_key_handler);
  761.         freeze_body();
  762.  
  763.         set_mode('loading');
  764.         fetch_items().then(quiz.start);
  765.     }
  766.  
  767.     //========================================================================
  768.     // init_custom_options()
  769.     //------------------------------------------------------------------------
  770.     function init_custom_options(custom) {
  771.         if (!custom) {
  772.             quiz.custom = {
  773.                 has_ipreset: false,
  774.                 using_ipreset: false,
  775.                 has_qpreset: false,
  776.                 using_qpreset: false,
  777.             }
  778.             return;
  779.         }
  780.         quiz.custom = custom;
  781.         if (custom.qpreset) {
  782.             quiz.custom.has_qpreset = true;
  783.             quiz.custom.using_qpreset = true;
  784.         }
  785.         if (custom.ipreset) {
  786.             quiz.custom.has_ipreset = true;
  787.             quiz.custom.using_ipreset = true;
  788.         }
  789.     }
  790.  
  791.     //========================================================================
  792.     // close_quiz()
  793.     //------------------------------------------------------------------------
  794.     function close_quiz(e) {
  795.         unfreeze_body();
  796.         $('body').off('.ss_quiz_key');
  797.         quiz.dialog.remove();
  798.         wkof.Settings.background.close();
  799.         if (quiz.custom && typeof quiz.custom.on_close === 'function') quiz.custom.on_close();
  800.     }
  801.  
  802.     var body_scroll_y;
  803.     function freeze_body() {
  804.         body_scroll_y = window.scrollY;
  805.         $('body').css('overflow', 'hidden').scrollTop(body_scroll_y);
  806.     }
  807.     function unfreeze_body() {
  808.         $('body').css('overflow','unset');
  809.         window.scroll({top:body_scroll_y});
  810.     }
  811.  
  812.     //========================================================================
  813.     // qpreset_changed()
  814.     //------------------------------------------------------------------------
  815.     function qpreset_changed(e) {
  816.         var settings = quiz.settings;
  817.         var selected = e.target.selectedOptions[0].attributes.name.value;
  818.         if (selected === 'custom') {
  819.             quiz.custom.using_qpreset = true;
  820.         } else {
  821.             quiz.custom.using_qpreset = false;
  822.             settings.active_qpreset = selected;
  823.             wkof.Settings.save('ss_quiz');
  824.         }
  825.         quiz.start();
  826.     }
  827.  
  828.     //========================================================================
  829.     // ipreset_changed()
  830.     //------------------------------------------------------------------------
  831.     function ipreset_changed(e) {
  832.         var settings = quiz.settings;
  833.         var selected = e.target.selectedOptions[0].attributes.name.value;
  834.         if (selected === 'custom') {
  835.             quiz.custom.using_ipreset = true;
  836.         } else {
  837.             quiz.custom.using_ipreset = false;
  838.             settings.active_ipreset = selected;
  839.             wkof.Settings.save('ss_quiz');
  840.         }
  841.         fetch_items().then(quiz.start);
  842.     }
  843.  
  844.     //========================================================================
  845.     // populate_presets()
  846.     //------------------------------------------------------------------------
  847.     function populate_presets(elem, presets, active_preset) {
  848.         var html = '';
  849.         for (var idx in presets) {
  850.             var preset = presets[idx];
  851.             var name = preset.name.replace(/</g,'&lt;').replace(/>/g,'&gt;');
  852.             html += '<option name="'+idx+'">'+name+'</option>';
  853.         }
  854.         var elem_name = elem.attr('id')
  855.         if (elem_name === 'ss_quiz_qna' && quiz.custom.has_qpreset) {
  856.             html += '<option name="custom">('+quiz.custom.qpreset.name+')</option>';
  857.             if (quiz.custom.using_qpreset) active_preset = presets.length;
  858.         } else if (elem_name === 'ss_quiz_source' && quiz.custom.has_ipreset) {
  859.             html += '<option name="custom">('+quiz.custom.ipreset.name+')</option>';
  860.             if (quiz.custom.using_ipreset) active_preset = presets.length;
  861.         }
  862.         elem.html(html);
  863.         elem.children().eq(active_preset).prop('selected', true);
  864.     }
  865.  
  866.     //########################################################################
  867.     // QUIZ DATA
  868.     //########################################################################
  869.  
  870.     var quiz = {
  871.         // Dialogs
  872.         dialog: null,
  873.         settings_dialog: null,
  874.  
  875.         // Item Lists
  876.         items: [],
  877.         group_list: [],
  878.         serial_list: [],
  879.         index: null,
  880.  
  881.         // Status
  882.         showing_help: false,
  883.         mode: 'loading',
  884.  
  885.         // Question Info
  886.         qinfo: {
  887.             load: load_qinfo,
  888.             prep: prep_qinfo,
  889.             cache: {},
  890.         },
  891.  
  892.         // Stats
  893.         stats: {
  894.             round: 1,
  895.             total: 0,
  896.             correct: 0,
  897.             incorrect: 0,
  898.         },
  899.  
  900.         // Functions
  901.         start: start_quiz,
  902.         shuffle: shuffle_quiz,
  903.         requiz: requiz,
  904.         ask: ask_question,
  905.         submit: submit_answer,
  906.         prev: prev_question,
  907.         next: next_question,
  908.         close: close_quiz,
  909.     };
  910.     gobj.open = open_quiz;
  911.  
  912.     //========================================================================
  913.     // fetch_items()
  914.     //------------------------------------------------------------------------
  915.     function fetch_items() {
  916.         var settings = quiz.settings;
  917.         var ipreset = (quiz.custom.using_ipreset ? quiz.custom.ipreset.content : settings.ipresets[settings.active_ipreset].content);
  918.  
  919.         set_mode('loading');
  920.         var config = {};
  921.         for (var src_name in ipreset) {
  922.             var src_preset = ipreset[src_name];
  923.             if (!src_preset.enabled) continue;
  924.             if (!wkof.ItemData.registry.sources[src_name]) continue;
  925.             var src_cfg = {};
  926.             config[src_name] = src_cfg;
  927.             src_cfg.filters = {};
  928.             if (src_name === 'wk_items') src_cfg.options = {study_materials: true};
  929.             var ipre_filters = src_preset.filters;
  930.             for (var flt_name in ipre_filters) {
  931.                 var ipre_flt = ipre_filters[flt_name];
  932.                 if (!ipre_flt.enabled) continue;
  933.                 if (!wkof.ItemData.registry.sources[src_name].filters[flt_name]) continue;
  934.                 src_cfg.filters[flt_name] = {value: ipre_flt.value};
  935.                 if (ipre_flt.invert === true) src_cfg.filters[flt_name].invert = true;
  936.             }
  937.         }
  938.         return wkof.ItemData.get_items(config)
  939.         .then(function(items){
  940.             quiz.items = items;
  941.         });
  942.     }
  943.  
  944.     //========================================================================
  945.     // shuffle_quiz()
  946.     //------------------------------------------------------------------------
  947.     function shuffle_quiz() {
  948.         var settings = quiz.settings;
  949.         var qpreset = (quiz.custom.using_qpreset ? quiz.custom.qpreset.content : settings.qpresets[settings.active_qpreset].content);
  950.         var pairing = settings.pairing || 'disabled';
  951.  
  952.         var valid_question_types = {
  953.             char2read: {radical:false, kanji:true,  vocabulary:true, kana_vocabulary:false},
  954.             char2mean: {radical:true,  kanji:true,  vocabulary:true, kana_vocabulary:true },
  955.             read2mean: {radical:false, kanji:false, vocabulary:true, kana_vocabulary:false},
  956.             mean2read: {radical:false, kanji:false, vocabulary:true, kana_vocabulary:true },
  957.             aud2read:  {radical:false, kanji:false, vocabulary:true, kana_vocabulary:true },
  958.             aud2mean:  {radical:false, kanji:false, vocabulary:true, kana_vocabulary:true },
  959.         };
  960.  
  961.         var id, idx, item, qset;
  962.         var grp_list = quiz.group_list = [];
  963.         quiz.stats.total = 0;
  964.         switch (pairing) {
  965.             case 'disabled':
  966.                 var qna = ['char2mean','char2read','read2mean','mean2read','aud2mean','aud2read'];
  967.                 for (id in quiz.items) {
  968.                     item = quiz.items[id];
  969.                     for (idx in qna) {
  970.                         var qtype = qna[idx];
  971.                         if (valid(qtype)) {
  972.                             grp_list.push({item:item, qna:[qtype], order:Math.random()});
  973.                         }
  974.                     }
  975.                 }
  976.                 break;
  977.  
  978.             case 'reading_first':
  979.                 for (id in quiz.items) {
  980.                     item = quiz.items[id];
  981.                     qset = [];
  982.                     if (valid('char2read')) qset.push('char2read');
  983.                     if (valid('char2mean')) qset.push('char2mean');
  984.                     if (qset.length > 0) grp_list.push({item:item, qna:qset, order:Math.random()});
  985.                     if (valid('mean2read')) grp_list.push({item:item, qna:['mean2read'], order:Math.random()});
  986.                     if (valid('read2mean')) grp_list.push({item:item, qna:['read2mean'], order:Math.random()});
  987.                     qset = [];
  988.                     if (valid('aud2read')) qset.push('aud2read');
  989.                     if (valid('aud2mean')) qset.push('aud2mean');
  990.                     if (qset.length > 0) grp_list.push({item:item, qna:qset, order:Math.random()});
  991.                 }
  992.                 break;
  993.  
  994.             case 'meaning_first':
  995.                 for (id in quiz.items) {
  996.                     item = quiz.items[id];
  997.                     qset = [];
  998.                     if (valid('char2mean')) qset.push('char2mean');
  999.                     if (valid('char2read')) qset.push('char2read');
  1000.                     if (qset.length > 0) grp_list.push({item:item, qna:qset, order:Math.random()});
  1001.                     if (valid('read2mean')) grp_list.push({item:item, qna:['read2mean'], order:Math.random()});
  1002.                     if (valid('mean2read')) grp_list.push({item:item, qna:['mean2read'], order:Math.random()});
  1003.                     qset = [];
  1004.                     if (valid('aud2mean')) qset.push('aud2mean');
  1005.                     if (valid('aud2read')) qset.push('aud2read');
  1006.                     if (qset.length > 0) grp_list.push({item:item, qna:qset, order:Math.random()});
  1007.                 }
  1008.                 break;
  1009.  
  1010.             case 'random_order':
  1011.                 for (id in quiz.items) {
  1012.                     item = quiz.items[id];
  1013.                     qset = [];
  1014.                     if (Math.random() < 0.5) {
  1015.                         if (valid('char2read')) qset.push('char2read');
  1016.                         if (valid('char2mean')) qset.push('char2mean');
  1017.                     } else {
  1018.                         if (valid('char2mean')) qset.push('char2mean');
  1019.                         if (valid('char2read')) qset.push('char2read');
  1020.                     }
  1021.                     if (qset.length > 0) grp_list.push({item:item, qna:qset, order:Math.random()});
  1022.                     if (valid('mean2read')) grp_list.push({item:item, qna:['mean2read'], order:Math.random()});
  1023.                     if (valid('read2mean')) grp_list.push({item:item, qna:['read2mean'], order:Math.random()});
  1024.                     qset = [];
  1025.                     if (Math.random() < 0.5) {
  1026.                         if (valid('aud2read')) qset.push('aud2read');
  1027.                         if (valid('aud2mean')) qset.push('aud2mean');
  1028.                     } else {
  1029.                         if (valid('aud2mean')) qset.push('aud2mean');
  1030.                         if (valid('aud2read')) qset.push('aud2read');
  1031.                     }
  1032.                     if (qset.length > 0) grp_list.push({item:item, qna:qset, order:Math.random()});
  1033.                 }
  1034.                 break;
  1035.         }
  1036.  
  1037.         grp_list.sort(function(a,b){return a.order - b.order;});
  1038.         var serial_list = quiz.serial_list = [];
  1039.         for (var idx1 in grp_list) {
  1040.             for (var idx2 in grp_list[idx1].qna) {
  1041.                 serial_list.push([idx1, idx2]);
  1042.             }
  1043.         }
  1044.         quiz.qinfo.cache = {};
  1045.         quiz.stats.real_total = quiz.stats.total;
  1046.         if (settings.max_quiz_size > 0) quiz.stats.total = Math.min(quiz.stats.total, settings.max_quiz_size);
  1047.  
  1048.         function valid(qtype) {
  1049.             var valid = ((qpreset[qtype] === true) && (valid_question_types[qtype][item.object] === true));
  1050.             if (valid) quiz.stats.total++;
  1051.             return valid;
  1052.         }
  1053.     }
  1054.  
  1055.     //########################################################################
  1056.     // QUIZ
  1057.     //########################################################################
  1058.  
  1059.     //========================================================================
  1060.     // jw_distance() - Jaro-Winkler Distance
  1061.     //------------------------------------------------------------------------
  1062.     function jw_distance(a, c) {var h,b,d,k,e,g,f,l,n,m,p;if(a.length>c.length) {c=[c,a];a=c[0];c=c[1];}k=~~Math.max(0,c.length/2-1);e=[];g=[];b=n=0;for(p=a.length;n<p;b=++n){for(h=a[b],l=Math.max(0,b-k),f=Math.min(b+k+1,c.length),d=m=l;l<=f?m<f:m>f;d=l<=f?++m:--m){if(g[d]===undefined&&h===c[d]){e[b]=h;g[d]=c[d];break;}}}e=e.join("");g=g.join("");d=e.length;if(d){b=f=k=0;for(l=e.length;f<l;b=++f){h=e[b];if(h!==g[b])k++;}b=g=e=0;for(f=a.length;g<f;b=++g){h=a[b];if(h===c[b])e++;else	break;}a=(d/a.length+d/c.length+(d-~~(k/2))/d)/3;a+=0.1*Math.min(e,4)*(1-a);}else{a=0;}return	a;}
  1063.  
  1064.     //========================================================================
  1065.     // to_title_case() - Make first letter of each word upper-case.
  1066.     //------------------------------------------------------------------------
  1067.     function to_title_case(str) {return str.replace(/\w\S*/g, function(txt){return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();});}
  1068.  
  1069.     //========================================================================
  1070.     // start_quiz()
  1071.     //------------------------------------------------------------------------
  1072.     function start_quiz(options) {
  1073.         if (!options) options = {};
  1074.         if (options.keep_round_count !== true) options.keep_round_count = false; // Default 'false'
  1075.         if (!options.keep_round_count) quiz.stats.round = 1;
  1076.         quiz.stats.correct = 0;
  1077.         quiz.stats.incorrect = 0;
  1078.         quiz.index = 0;
  1079.         quiz.shuffle();
  1080.         if (quiz.stats.total === 0) return set_mode('no_items');
  1081.         set_mode('question');
  1082.     }
  1083.  
  1084.     //========================================================================
  1085.     // requiz()
  1086.     //------------------------------------------------------------------------
  1087.     function requiz() {
  1088.         quiz.do_requiz = true;
  1089.         quiz.next();
  1090.     }
  1091.  
  1092.     //========================================================================
  1093.     // set_mode()
  1094.     //------------------------------------------------------------------------
  1095.     function set_mode(mode) {
  1096.         var dialog = quiz.dialog;
  1097.         if (mode === 'previous') mode = quiz.last_mode;
  1098.         dialog.attr('data-mode', mode);
  1099.         switch (mode) {
  1100.             case 'loading':
  1101.                 dialog.attr('data-itype', 'loading');
  1102.                 dialog.attr('data-atype', 'loading');
  1103.                 dialog.find('.atype').html('Loading...');
  1104.                 break;
  1105.  
  1106.             case 'no_items':
  1107.                 dialog.attr('data-itype', 'loading');
  1108.                 dialog.attr('data-atype', 'reading');
  1109.                 dialog.find('.atype').html('No questions found!');
  1110.                 break;
  1111.  
  1112.             case 'question':
  1113.                 ask_question();
  1114.                 break;
  1115.  
  1116.             case 'summary':
  1117.                 dialog.attr('data-atype', 'reading');
  1118.                 dialog.find('.atype').html('[Enter] for new quiz, [Esc] to return');
  1119.                 dialog.find('.answer input').val('').prop('readonly', true);
  1120.                 dialog.attr('data-result', '');
  1121.                 populate_errors();
  1122.                 break;
  1123.         }
  1124.         if (quiz.mode !== quiz.last_mode) quiz.last_mode = quiz.mode;
  1125.         quiz.mode = mode;
  1126.     }
  1127.  
  1128.     function is_svg(img) {return (img.content_type === 'image/svg+xml') && (img.metadata.inline_styles === true);}
  1129.  
  1130.     //========================================================================
  1131.     // ask_question()
  1132.     //------------------------------------------------------------------------
  1133.     function ask_question(erase_old_answer) {
  1134.         var dialog = quiz.dialog;
  1135.         var qinfo = quiz.qinfo.load(quiz.index);
  1136.  
  1137.         toggle_help('off');
  1138.         dialog.attr('data-itype', qinfo.item.type);
  1139.         dialog.attr('data-qtype', qinfo.question.type);
  1140.         dialog.attr('data-atype', qinfo.answer.type);
  1141.         if (quiz.message_timer) {
  1142.             clearTimeout(quiz.message_timer);
  1143.             delete quiz.message_timer;
  1144.         }
  1145.         dialog.removeClass('message');
  1146.  
  1147.         // Draw the question
  1148.         var question = dialog.find('.question');
  1149.         question.attr('lang', qinfo.question.lang);
  1150.         if (qinfo.question.html || qinfo.item.type !== 'radical') {
  1151.             question.html(qinfo.question.html);
  1152.         } else {
  1153.             qinfo.question.svg_promise.then(function(qinfo){
  1154.                 if (quiz.index === qinfo.index) question.html(qinfo.question.html);
  1155.             });
  1156.         }
  1157.  
  1158.         // Initialize the answer
  1159.         var input = $('#ss_quiz .answer input');
  1160.         var old_answer = get_user_answer(quiz.index);
  1161.         if (erase_old_answer) {
  1162.             if (old_answer[0] !== '') quiz.stats[old_answer[0]]--;
  1163.             update_quiz_stats();
  1164.             set_user_answer(quiz.index, '', '');
  1165.             old_answer = ['', ''];
  1166.         }
  1167.         if (old_answer[0] !== '') {
  1168.             dialog.attr('data-result', old_answer[0]);
  1169.             input.val(old_answer[1]).prop('readonly', true);
  1170.         } else {
  1171.             dialog.attr('data-result', '');
  1172.             input.val('').prop('readonly', false);
  1173.         }
  1174.  
  1175.         if (qinfo.answer.lang === 'ja') {
  1176.             if (input.attr('lang') !== 'ja') {
  1177.                 input.attr('lang', 'ja');
  1178.                 wanakana.bind(input[0], {IMEMode:true});
  1179.             }
  1180.         } else {
  1181.             if (input.attr('lang') === 'ja') {
  1182.                 input.attr('lang', 'en');
  1183.                 wanakana.unbind(input[0]);
  1184.             }
  1185.         }
  1186.  
  1187.         // Populate the help window
  1188.         if (qinfo.question.type !== 'characters' && qinfo.answer.type === 'reading') {
  1189.             dialog.find('.help').attr('lang',qinfo.answer.lang).html(to_title_case(qinfo.answer.good.join(', '))+(' ('+qinfo.item.object.data.characters+')')+(qinfo.answer.help_suffix || ''));
  1190.         } else {
  1191.             dialog.find('.help').attr('lang',qinfo.answer.lang).html(to_title_case(qinfo.answer.good.join(', '))+(qinfo.answer.help_suffix || ''));
  1192.         }
  1193.         dialog.find('.atype').html(qinfo.answer.html);
  1194.  
  1195.         // Update progress stats
  1196.         update_quiz_stats();
  1197.  
  1198.         // If question is audio, play audio now.
  1199.         if (!erase_old_answer && qinfo.question.type === 'audio') {
  1200.             play_audio(true /* force_play */, qinfo);
  1201.         }
  1202.  
  1203.         input.focus();
  1204.  
  1205.         quiz.qinfo.prep(quiz.index);
  1206.     }
  1207.  
  1208.     //========================================================================
  1209.     // play_audio()
  1210.     //------------------------------------------------------------------------
  1211.     function play_audio(force_play, qinfo) {
  1212.         if (quiz.settings.mute_audio) return;
  1213.         if (!force_play && !quiz.settings.play_audio) return;
  1214.         if (!qinfo) qinfo = quiz.qinfo.load(quiz.index);
  1215.         if (!qinfo) return;
  1216.         if (!qinfo.question.audio_promise) return;
  1217.         qinfo.question.audio_promise.then(function(qinfo){
  1218.             if (!((quiz.index === qinfo.index) ||
  1219.                   (quiz.settings.lightning_mode && quiz.index === (qinfo.index + 1)))) return;
  1220.             qinfo.question.audio.currentTime = 0;
  1221.             qinfo.question.audio.play();
  1222.         });
  1223.     }
  1224.  
  1225.     //========================================================================
  1226.     // load_qinfo()
  1227.     //------------------------------------------------------------------------
  1228.     function load_qinfo(index) {
  1229.         if (index < 0 || index >= quiz.stats.total) return null;
  1230.         if (!quiz.qinfo.cache[index]) populate_qinfo(index);
  1231.         return quiz.qinfo.cache[index];
  1232.     }
  1233.  
  1234.     //========================================================================
  1235.     // prep_qinfo()
  1236.     //------------------------------------------------------------------------
  1237.     function prep_qinfo(index) {
  1238.         Object.keys(quiz.qinfo.cache).forEach(function(cache_idx){
  1239.             if (cache_idx < index-2 || cache_idx > index+2) {
  1240.                 delete quiz.qinfo.cache[cache_idx];
  1241.             }
  1242.         });
  1243.         for (var ofs = 1; ofs <= 2; ofs++) {
  1244.             populate_qinfo(index+ofs);
  1245.         }
  1246.     }
  1247.  
  1248.     //========================================================================
  1249.     // populate_qinfo()
  1250.     //------------------------------------------------------------------------
  1251.     function populate_qinfo(index) {
  1252.         if (index < 0 || index >= quiz.stats.total) return;
  1253.         if (quiz.qinfo.cache[index]) return;
  1254.         var qinfo = {index:index, item:{}, question:{}, answer:{}};
  1255.         quiz.qinfo.cache[index] = qinfo;
  1256.  
  1257.         var grp_idx = quiz.serial_list[index];
  1258.         var group = quiz.group_list[grp_idx[0]];
  1259.         var item = group.item;
  1260.         var qnatype = group.qna[grp_idx[1]];
  1261.         qinfo.first_in_group = (grp_idx[1] == 0);
  1262.         qinfo.item.type = item.object;
  1263.         qinfo.item.object = item;
  1264.         qinfo.question.type = {
  1265.             char2read:'characters', char2mean:'characters', mean2read:'meaning',
  1266.             read2mean:'reading', aud2read:'audio', aud2mean:'audio'
  1267.         }[qnatype];
  1268.         qinfo.answer.type = {
  1269.             char2read:'reading', char2mean:'meaning', mean2read:'reading',
  1270.             read2mean:'meaning', aud2read:'reading', aud2mean:'meaning'
  1271.         }[qnatype];
  1272.         qinfo.answer.html = to_title_case((qinfo.item.type==='kana_vocabulary'?'Kana Vocabulary':qinfo.item.type)+' '+qinfo.answer.type);
  1273.  
  1274.         var synonyms = [];
  1275.         try {synonyms = item.study_materials.meaning_synonyms || [];} catch(e) {}
  1276.         var meanings = item.data.meanings.map(meaning => meaning.meaning);
  1277.         if (typeof item.data.auxiliary_meanings !== 'undefined') {
  1278.             meanings = meanings.concat(item.data.auxiliary_meanings.filter(m=>m.type==='whitelist').map(m=>m.meaning))
  1279.         }
  1280.         if (quiz.settings.synonyms_order === 'first') {
  1281.             meanings = synonyms.concat(meanings).map(meaning => meaning.toLowerCase());
  1282.         } else {
  1283.             meanings = meanings.concat(synonyms).map(meaning => meaning.toLowerCase());
  1284.         }
  1285.  
  1286.         if (qinfo.item.type === 'vocabulary' || qinfo.item.type === 'kana_vocabulary') {
  1287.             qinfo.question.audio_promise = new Promise(function(resolve, reject){
  1288.                 qinfo.question.audio = new Audio();
  1289.                 qinfo.question.audio.oncanplaythrough = function(){
  1290.                     resolve(qinfo);
  1291.                 }
  1292.                 if (item.id !== undefined) {
  1293.                     var audio_sources = item.data.pronunciation_audios;
  1294.                     var filtered_sources;
  1295.                     switch (quiz.settings.audio_type) {
  1296.                         case 'mp3': filtered_sources = audio_sources.filter(a => a.content_type == 'audio/mpeg'); break;
  1297.                         case 'ogg': filtered_sources = audio_sources.filter(a => a.content_type == 'audio/ogg'); break;
  1298.                         default: filtered_sources = audio_sources;
  1299.                     }
  1300.                     if (filtered_sources.length !== 0) audio_sources = filtered_sources;
  1301.                     switch (quiz.settings.audio_gender) {
  1302.                         case 'male': filtered_sources = audio_sources.filter(a => a.metadata.gender == 'male'); break;
  1303.                         case 'female': filtered_sources = audio_sources.filter(a => a.metadata.gender == 'female'); break;
  1304.                         case 'rotate':
  1305.                             quiz.gender = quiz.gender || 'female';
  1306.                             quiz.gender = (quiz.gender === 'female' ? 'male' : 'female');
  1307.                             filtered_sources = audio_sources.filter(a => a.metadata.gender == quiz.gender);
  1308.                             break;
  1309.                         default: filtered_sources = audio_sources;
  1310.                     }
  1311.                     if (filtered_sources.length !== 0) audio_sources = filtered_sources;
  1312.                     if (audio_sources.length === 0) {
  1313.                         qinfo.question.audio.src = null;
  1314.                     } else {
  1315.                         qinfo.question.audio.src = audio_sources[Math.floor(Math.random() * audio_sources.length)].url;
  1316.                     }
  1317.                 }
  1318.             });
  1319.         }
  1320.  
  1321.         switch (qinfo.question.type) {
  1322.             case 'characters':
  1323.                 qinfo.question.lang = 'ja';
  1324.                 if (qinfo.item.type === 'radical' && !item.data.characters) {
  1325.                     var svg_url = item.data.character_images.filter(is_svg)[0].url;
  1326.                     qinfo.question.svg_promise = wkof.load_file(svg_url).then(function(svg){
  1327.                         qinfo.question.html = svg.replace(/svg /, 'svg class="radical"');
  1328.                         return qinfo;
  1329.                     });
  1330.                 } else {
  1331.                     qinfo.question.html = item.data.characters;
  1332.                 }
  1333.                 break;
  1334.  
  1335.             case 'reading':
  1336.                 qinfo.question.lang = 'ja';
  1337.                 qinfo.question.html = item.data.readings.map(reading => reading.reading).join(', ');
  1338.                 break;
  1339.  
  1340.             case 'meaning':
  1341.                 qinfo.question.lang = 'en';
  1342.                 qinfo.question.html = to_title_case(meanings.join(', '));
  1343.                 break;
  1344.  
  1345.             case 'audio':
  1346.                 qinfo.question.lang = 'ja';
  1347.                 qinfo.question.html = '<span class="fa fa-audio"></span>';
  1348.                 qinfo.answer.help_suffix = '<br><span lang="ja">('+item.data.characters+')</span>';
  1349.                 break;
  1350.         }
  1351.  
  1352.         var idx, idx2, reading;
  1353.         qinfo.answer.other = [];
  1354.         qinfo.answer.bad = [];
  1355.         qinfo.answer.reading_type = '';
  1356.         switch (qinfo.answer.type) {
  1357.             case 'reading':
  1358.                 qinfo.answer.good = [];
  1359.                 qinfo.answer.lang = 'ja';
  1360.                 if (qinfo.item.type === 'kana_vocabulary') {
  1361.                     qinfo.answer.good.push(item.data.characters);
  1362.                 } else {
  1363.                     for (idx in item.data.readings) {
  1364.                         reading = item.data.readings[idx];
  1365.                         if (qinfo.item.type === 'vocabulary' || reading.accepted_answer) {
  1366.                             qinfo.answer.good.push(reading.reading);
  1367.                             if (qinfo.item.type === 'kanji') {
  1368.                                 qinfo.answer.reading_type = reading.type.replace('yomi','\'yomi');
  1369.                             }
  1370.                         } else {
  1371.                             qinfo.answer.other.push(reading.reading);
  1372.                         }
  1373.                     }
  1374.                 }
  1375.                 qinfo.answer.bad = meanings;
  1376.                 break;
  1377.  
  1378.             case 'meaning':
  1379.                 qinfo.answer.good = meanings;
  1380.                 qinfo.answer.lang = 'en';
  1381.                 if (!item.data.readings) break;
  1382.                 for (idx in item.data.readings) {
  1383.                     reading = item.data.readings[idx];
  1384.  
  1385.                     if (qinfo.item.type === 'vocabulary' || reading.accepted_answer) {
  1386.                         qinfo.answer.bad.push(reading.reading);
  1387.                     }
  1388.                 }
  1389.                 break;
  1390.         }
  1391.     }
  1392.  
  1393.     //========================================================================
  1394.     // get_user_answer()
  1395.     //------------------------------------------------------------------------
  1396.     function get_user_answer(index) {
  1397.         var grp_idx = quiz.serial_list[index];
  1398.         var group = quiz.group_list[grp_idx[0]];
  1399.         if (!group.answer || !group.answer[grp_idx[1]]) return ['', ''];
  1400.         return group.answer[grp_idx[1]];
  1401.     }
  1402.  
  1403.     //========================================================================
  1404.     // set_user_answer()
  1405.     //------------------------------------------------------------------------
  1406.     function set_user_answer(index, status, answer) {
  1407.         var grp_idx = quiz.serial_list[index];
  1408.         var group = quiz.group_list[grp_idx[0]];
  1409.         if (!group.answer) group.answer = [];
  1410.         group.answer[grp_idx[1]] = [status, answer];
  1411.     }
  1412.  
  1413.     //========================================================================
  1414.     // submit_answer()
  1415.     //------------------------------------------------------------------------
  1416.     function submit_answer() {
  1417.         var dialog = quiz.dialog;
  1418.         var input = $('#ss_quiz .answer input');
  1419.  
  1420.         var qinfo = quiz.qinfo.load(quiz.index);
  1421.         var item = qinfo.item.object;
  1422.         var itype = qinfo.item.type;
  1423.         var atype = qinfo.answer.type;
  1424.         var raw_answer = input.val().trim();
  1425.         var answer = raw_answer;
  1426.         var action = 'fail';
  1427.         var msgcfg = quiz.settings.messages;
  1428.         var is_exact = true;
  1429.         var is_multi = false;
  1430.         var message;
  1431.  
  1432.         if (answer === '') {
  1433.             atype = 'ignore';
  1434.             action = 'shake';
  1435.         }
  1436.  
  1437.         switch (atype) {
  1438.             case 'reading':
  1439.                 answer = wanakana.toHiragana(answer);
  1440.                 if (qinfo.answer.good.indexOf(answer) >= 0 || qinfo.answer.good.indexOf(raw_answer) >= 0) {
  1441.                     action = 'correct';
  1442.                     if (qinfo.answer.good.length > 1) is_multi = true;
  1443.                     if (is_multi && msgcfg.show_multi_reading) message = 'This item has multiple readings';
  1444.                 } else if (itype === 'kanji' && qinfo.answer.other.indexOf(answer) >= 0) {
  1445.                     action = 'shake';
  1446.                     message = 'We\'re looking for the '+to_title_case(qinfo.answer.reading_type)+' reading';
  1447.                 } else {
  1448.                     var bad = qinfo.answer.bad.map(function(english){
  1449.                         return wanakana.toHiragana(english.toLowerCase());
  1450.                     });
  1451.                     if (bad.indexOf(answer) >= 0) {
  1452.                         action = 'shake';
  1453.                         message = 'We\'re looking for the reading, not the meaning';
  1454.                     } else if (!wanakana.isKana(answer)) {
  1455.                         action = 'shake';
  1456.                         message = 'Your answer contains invalid characters';
  1457.                     } else {
  1458.                         action = 'incorrect';
  1459.                     }
  1460.                 }
  1461.                 break;
  1462.  
  1463.             case 'meaning':
  1464.                 var is_correct = false;
  1465.                 is_exact = false;
  1466.                 answer = answer.toLowerCase();
  1467.                 var allow_typos = (quiz.settings.allow_typos === true);
  1468.                 for (var idx in qinfo.answer.good) {
  1469.                     var good_answer = qinfo.answer.good[idx];
  1470.                     if (answer === good_answer) {
  1471.                         is_correct = true;
  1472.                         is_exact = true;
  1473.                         break;
  1474.                     } else if (allow_typos && (good_answer.match(/[0-9]/) == null) && jw_distance(good_answer, answer) > 0.9) {
  1475.                         is_correct = true;
  1476.                     }
  1477.                 }
  1478.                 if (is_correct) {
  1479.                     action = 'correct';
  1480.                     if (!is_exact && msgcfg.show_slightly_off === true) message = "Your answer was slightly off";
  1481.                 } else {
  1482.                     var alt_answer = wanakana.toHiragana(answer,{IMEMode:true});
  1483.                     if (qinfo.answer.bad.indexOf(alt_answer) >= 0) {
  1484.                         action = 'shake';
  1485.                         message = 'We\'re looking for the meaning, not the reading';
  1486.                     } else {
  1487.                         action = 'incorrect';
  1488.                     }
  1489.                 }
  1490.                 break;
  1491.         }
  1492.  
  1493.         if (action !== 'shake') set_user_answer(quiz.index, action, answer);
  1494.         switch (action) {
  1495.             case 'correct':
  1496.                 quiz.stats.correct++;
  1497.  
  1498.                 // If question is reading, play audio now.
  1499.                 if (qinfo.answer.type === 'reading' && qinfo.question.type !== 'audio') {
  1500.                     play_audio(false /* force_play */, qinfo);
  1501.                 }
  1502.  
  1503.                 if ((quiz.settings.lightning_mode === true) &&
  1504.                     (!is_multi || !msgcfg.show_multi_reading || !msgcfg.halt_multi_reading) &&
  1505.                     (is_exact || !msgcfg.show_slightly_off || !msgcfg.halt_slightly_off )) {
  1506.  
  1507.                     return quiz.next();
  1508.                 } else {
  1509.                     update_quiz_stats();
  1510.                     input.prop('readonly', true);
  1511.                 }
  1512.                 dialog.attr('data-result', 'correct');
  1513.                 break;
  1514.  
  1515.             case 'shake':
  1516.                 shake(input);
  1517.                 input.focus();
  1518.                 break;
  1519.  
  1520.             case 'incorrect':
  1521.                 quiz.stats.incorrect++;
  1522.                 update_quiz_stats();
  1523.                 input.prop('readonly', true);
  1524.                 dialog.attr('data-result', 'incorrect');
  1525.  
  1526.                 if (quiz.settings.autoshow_correct && !quiz.showing_help) {
  1527.                     toggle_help('on');
  1528.                 }
  1529.                 break;
  1530.         }
  1531.  
  1532.         if (message) {
  1533.             dialog.find('.message').text(message);
  1534.             dialog.addClass('message');
  1535.             if (quiz.message_timer) {
  1536.                 clearTimeout(quiz.message_timer);
  1537.                 delete quiz.message_timer;
  1538.             }
  1539.             quiz.message_timer = setTimeout(function(){
  1540.                 dialog.removeClass('message');
  1541.                 quiz.message_timer = undefined;
  1542.             },2750);
  1543.         }
  1544.     }
  1545.  
  1546.     //========================================================================
  1547.     // shake()
  1548.     //------------------------------------------------------------------------
  1549.     function shake(elem) {
  1550.         var dist = '15px';
  1551.         var speed = 75;
  1552.         var right = {padding:'0 '+dist+' 0 0'}, left = {padding:'0 0 0 '+dist}, center = {padding:"0 0 0 0"};
  1553.  
  1554.         elem.animate(left,speed/2).animate(right,speed)
  1555.         .animate(left,speed).animate(right,speed)
  1556.         .animate(left,speed).animate(center,speed/2);
  1557.     }
  1558.  
  1559.     //========================================================================
  1560.     // prev_question()
  1561.     //------------------------------------------------------------------------
  1562.     function prev_question() {
  1563.         switch (quiz.mode) {
  1564.             case 'question':
  1565.                 if (quiz.index > 0) quiz.index--;
  1566.                 quiz.ask();
  1567.                 break;
  1568.  
  1569.             case 'summary':
  1570.                 if (quiz.index === quiz.stats.total) {
  1571.                     quiz.index = quiz.stats.total - 1;
  1572.                     update_quiz_stats();
  1573.                 }
  1574.                 set_mode('question');
  1575.                 break;
  1576.         }
  1577.         quiz.ask();
  1578.     }
  1579.  
  1580.     //========================================================================
  1581.     // next_question()
  1582.     //------------------------------------------------------------------------
  1583.     function next_question() {
  1584.         switch (quiz.mode) {
  1585.             case 'question':
  1586.                 if (quiz.index < quiz.stats.total-1) {
  1587.                     quiz.index++;
  1588.                     quiz.ask();
  1589.                 } else {
  1590.                     quiz.index = quiz.stats.total;
  1591.                     update_quiz_stats();
  1592.                     set_mode('summary');
  1593.                 }
  1594.                 break;
  1595.  
  1596.             case 'summary':
  1597.                 if (quiz.do_requiz) {
  1598.                     delete quiz.do_requiz;
  1599.                     if (!quiz.original_items) {
  1600.                         quiz.original_items = quiz.items;
  1601.                     }
  1602.                     quiz.items = quiz.requiz_items;
  1603.                     delete quiz.requiz_items;
  1604.                 } else {
  1605.                     delete quiz.requiz_items;
  1606.                     if (quiz.original_items) {
  1607.                         quiz.items = quiz.original_items;
  1608.                         delete quiz.original_items;
  1609.                     }
  1610.                     quiz.stats.round++;
  1611.                 }
  1612.                 quiz.start({keep_round_count:true});
  1613.                 break;
  1614.         }
  1615.     }
  1616.  
  1617.     //========================================================================
  1618.     // populate_errors()
  1619.     //------------------------------------------------------------------------
  1620.     function populate_errors() {
  1621.         var dialog = quiz.dialog;
  1622.         var percent_elem = dialog.find('.summary .percent');
  1623.         var errors_elem = dialog.find('.summary .errors');
  1624.  
  1625.         var total = quiz.stats.correct + quiz.stats.incorrect;
  1626.         var percent = (total === 0 ? 100 : 100 * quiz.stats.correct / total);
  1627.         percent_elem.text((Math.round(percent*100)/100).toString()+'%');
  1628.         if (total === quiz.stats.correct) {
  1629.             $('#ss_quiz .summary .requiz').addClass('hidden');
  1630.         } else {
  1631.             $('#ss_quiz .summary .requiz').removeClass('hidden');
  1632.         }
  1633.  
  1634.         var idx;
  1635.         var err_list = dialog.find('.summary .errors');
  1636.         err_list.html('');
  1637.         var requiz_items = {};
  1638.         quiz.requiz_items = [];
  1639.         for (idx = 0; idx < quiz.stats.total; idx++) {
  1640.             var grp_idx = quiz.serial_list[idx];
  1641.             var group = quiz.group_list[grp_idx[0]];
  1642.             if (!group.answer) continue;
  1643.             var answer = group.answer[grp_idx[1]];
  1644.             if (!answer || answer[0] !== 'incorrect') continue;
  1645.             var item = group.item;
  1646.             if (!requiz_items[item.id]) {
  1647.                 requiz_items[item.id] = 1;
  1648.                 quiz.requiz_items.push(item);
  1649.             }
  1650.             var itype = (item.object === 'kana_vocabulary' ? 'vocabulary' : item.object);
  1651.             var qnatype = group.qna[grp_idx[1]];
  1652.             answer = answer[1];
  1653.             var qtype = {
  1654.                 char2read:'characters', char2mean:'characters', mean2read:'meaning',
  1655.                 read2mean:'reading', aud2read:'audio', aud2mean:'audio'
  1656.             }[qnatype];
  1657.             var atype = {
  1658.                 char2read:'reading', char2mean:'meaning', mean2read:'reading',
  1659.                 read2mean:'meaning', aud2read:'reading', aud2mean:'meaning'
  1660.             }[qnatype];
  1661.             var qlang = (qtype === 'meaning' ? 'en' : 'ja');
  1662.             var alang = (atype === 'meaning' ? 'en' : 'ja');
  1663.             var qtitle = to_title_case(itype+' '+atype);
  1664.             var atitle;
  1665.             switch (atype) {
  1666.                 case 'meaning':
  1667.                     var synonyms = [];
  1668.                     try {synonyms = item.study_materials.meaning_synonyms || [];} catch(e) {}
  1669.                     var meanings = item.data.meanings.map(meaning => meaning.meaning);
  1670.                     if (quiz.settings.synonyms_order === 'first') {
  1671.                         meanings = synonyms.concat(meanings).map(meaning => meaning.toLowerCase());
  1672.                     } else {
  1673.                         meanings = meanings.concat(synonyms).map(meaning => meaning.toLowerCase());
  1674.                     }
  1675.                     atitle = meanings.join(', ');
  1676.                     break;
  1677.                 case 'reading':
  1678.                     atitle = to_title_case(item.data.readings.map(reading => reading.reading).join(', '));
  1679.                     if (qtype !== 'characters') atitle += ' ('+item.data.characters+')';
  1680.                     break;
  1681.             }
  1682.             var qtext = item.data.slug;
  1683.             if (qtype === 'audio') {
  1684.                 qtext += ' <i class="fa fa-audio icon-style"></i>';
  1685.             } else if (qtype === 'meaning') {
  1686.                 synonyms = [];
  1687.                 try {synonyms = item.study_materials.meaning_synonyms || [];} catch(e) {}
  1688.                 meanings = item.data.meanings.map(meaning => meaning.meaning);
  1689.                 if (quiz.settings.synonyms_order === 'first') {
  1690.                     meanings = synonyms.concat(meanings).map(meaning => meaning.toLowerCase());
  1691.                 } else {
  1692.                     meanings = meanings.concat(synonyms).map(meaning => meaning.toLowerCase());
  1693.                 }
  1694.                 qtext = meanings.join(', ');
  1695.             }
  1696.             var atext = answer + ' <i class="fa fa-times-circle wrong"></i>';
  1697.             err_list.append(
  1698.                 '<li><span class="que" lang="'+qlang+'" title="'+qtitle+'">'+qtext+'</span>'+
  1699.                 '<i class="fa fa-long-arrow-right icon-style"></i>'+
  1700.                 '<span class="ans" lang="'+alang+'" title="'+atitle+'">'+atext+'</span></li>'
  1701.             );
  1702.         }
  1703.     }
  1704.  
  1705.     //========================================================================
  1706.     // update_quiz_stats()
  1707.     //------------------------------------------------------------------------
  1708.     function update_quiz_stats() {
  1709.         var stats = $('#ss_quiz .stats_labels');
  1710.         var stats_width = quiz.stats.total.toString().length; // Number of digits in quiz counter
  1711.         var remaining = quiz.stats.total - quiz.index;
  1712.         stats.html(
  1713.             'Round: '+('       '+quiz.stats.round).slice(-1*stats_width)+'<br>'+
  1714.             'Remaining: '+('       '+remaining).slice(-1*stats_width)+'<br>'+
  1715.             'Correct: '+('       '+quiz.stats.correct).slice(-1*stats_width)+'<br>'+
  1716.             'Incorrect: '+('       '+quiz.stats.incorrect).slice(-1*stats_width)
  1717.         );
  1718.     }
  1719.  
  1720.     //========================================================================
  1721.     // quiz_key_handler()
  1722.     //------------------------------------------------------------------------
  1723.     var keycode_xlat = {
  1724.         '8':'Backspace', '13':'Enter', '27':'Escape', '37':'ArrowLeft', '39':'ArrowRight', '65':'KeyA',
  1725.         '69':'KeyE', '72':'KeyH', '76':'KeyL', '80':'KeyP', '82':'KeyR', '83':'KeyS', '112':'F1',
  1726.     };
  1727.     function quiz_key_handler(e) {
  1728.         if (quiz_settings_state === 'open') return true;
  1729.         var input = quiz.dialog.find('.answer input');
  1730.         var input_readonly = input.prop('readonly');
  1731.         var code;
  1732.         if (e.type === 'keydown') {
  1733.             if (e.originalEvent.keyCode) {
  1734.                 code = keycode_xlat[e.originalEvent.keyCode] || 'Unknown';
  1735.             } else {
  1736.                 code = e.originalEvent.code;
  1737.             }
  1738.         } else {
  1739.             code = String.fromCharCode(e.charCode);
  1740.         }
  1741.  
  1742.         if (code === 'Enter') {
  1743.             if (quiz.mode === 'question' && !input_readonly) {
  1744.                 quiz.submit(e);
  1745.             } else {
  1746.                 quiz.next();
  1747.             }
  1748.         } else if (code === 'Escape') {
  1749.             process_escape();
  1750.         } else if (code === 'F1' || code === '?') {
  1751.             toggle_help();
  1752.         } else if (code === 'Backspace') {
  1753.             // Prevent backspace from navigating away from the page.
  1754.             if (quiz.mode !== 'question') return false;
  1755.             if (input_readonly) quiz.ask(true /* erase_old_answer */);
  1756.             return true;
  1757.         } else if (e.ctrlKey || e.metaKey) {
  1758.             switch (code) {
  1759.                 case 'KeyA':
  1760.                     if (e.shiftKey) {
  1761.                         toggle_audio();
  1762.                     } else {
  1763.                         play_audio(true);
  1764.                     }
  1765.                     break;
  1766.                 case 'KeyE': process_escape(); break;   // End
  1767.                 case 'KeyH': toggle_help(); break;      // Help
  1768.                 case 'KeyL': toggle_lightning(); break; // Lightning
  1769.                 case 'KeyP': toggle_pairing(); break;   // Pairing
  1770.                 case 'KeyR': // Re-quiz
  1771.                     if (quiz.mode !== 'summary' || quiz.dialog.find('.summary .requiz').hasClass('hidden')) break;
  1772.                     quiz.requiz();
  1773.                     break;
  1774.                 case 'KeyS': manual_shuffle(); break;
  1775.                 case 'ArrowLeft': quiz.prev(); break;
  1776.                 case 'ArrowRight': quiz.next(); break;
  1777.                 default: return true;
  1778.             }
  1779.         } else {
  1780.             var is_special = (e.key.length !== 1);
  1781.             if (is_special) return true;
  1782.  
  1783.             // Let the browser handle regular keys in the input box
  1784.             if (e.target === input[0]) return true;
  1785.  
  1786.             // Let the browser handle all other keys while not in question mode.
  1787.             if (quiz.mode !== 'question') return true;
  1788.         }
  1789.         return false;
  1790.     }
  1791.  
  1792.     //========================================================================
  1793.     // manual_shuffle()
  1794.     //------------------------------------------------------------------------
  1795.     function manual_shuffle() {
  1796.         var keep_round_count = true;
  1797.         if (quiz.shuffle_timer === undefined) {
  1798.             quiz.shuffle_timer = setTimeout(function(){
  1799.                 delete quiz.shuffle_timer;
  1800.             }, 1000);
  1801.         } else {
  1802.             clearTimeout(quiz.shuffle_timer);
  1803.             delete quiz.shuffle_timer;
  1804.             keep_round_count = false;
  1805.         }
  1806.         quiz.start({keep_round_count:keep_round_count});
  1807.     }
  1808.  
  1809.     //========================================================================
  1810.     // process_escape()
  1811.     //------------------------------------------------------------------------
  1812.     function process_escape() {
  1813.         if (quiz.escape_timer === undefined) {
  1814.             quiz.escape_counter = 1;
  1815.             quiz.escape_timer = setTimeout(function(){
  1816.                 delete quiz.escape_counter;
  1817.                 delete quiz.escape_timer;
  1818.             }, 750);
  1819.         } else {
  1820.             quiz.escape_counter++;
  1821.             if (quiz.escape_counter === 3) {
  1822.                 clearTimeout(quiz.escape_timer);
  1823.                 delete quiz.escape_timer;
  1824.                 quiz.close();
  1825.                 return;
  1826.             }
  1827.         }
  1828.         switch (quiz.mode) {
  1829.             case 'question':
  1830.                 set_mode('summary');
  1831.                 break;
  1832.  
  1833.             case 'summary':
  1834.                 if (quiz.index === quiz.stats.total) quiz.index = quiz.stats.total-1;
  1835.                 set_mode('previous');
  1836.                 break;
  1837.         }
  1838.     }
  1839.  
  1840.     //========================================================================
  1841.     // toggle_audio()
  1842.     //------------------------------------------------------------------------
  1843.     function toggle_audio() {
  1844.         var elem = $('#ss_quiz .settings .ss_audio');
  1845.         if (quiz.settings.mute_audio) {
  1846.             quiz.settings.mute_audio = false;
  1847.             quiz.settings.play_audio = false;
  1848.             elem.removeClass('mute');
  1849.             elem.removeClass('active');
  1850.         } else if (quiz.settings.play_audio) {
  1851.             quiz.settings.mute_audio = true;
  1852.             quiz.settings.play_audio = false;
  1853.             elem.addClass('mute');
  1854.             elem.removeClass('active');
  1855.         } else {
  1856.             quiz.settings.mute_audio = false;
  1857.             quiz.settings.play_audio = true;
  1858.             elem.removeClass('mute');
  1859.             elem.addClass('active');
  1860.         }
  1861.         wkof.Settings.save('ss_quiz');
  1862.     }
  1863.  
  1864.     //========================================================================
  1865.     // toggle_help()
  1866.     //------------------------------------------------------------------------
  1867.     function toggle_help(value) {
  1868.         if (quiz.mode !== 'question') return;
  1869.         var elem = $('#ss_quiz .settings .ss_help');
  1870.         switch (value) {
  1871.             case 'on':
  1872.                 elem.addClass('active');
  1873.                 quiz.dialog.addClass('help');
  1874.                 quiz.showing_help = true;
  1875.                 break;
  1876.             case 'off':
  1877.                 elem.removeClass('active');
  1878.                 quiz.dialog.removeClass('help');
  1879.                 quiz.showing_help = false;
  1880.                 break;
  1881.             default:
  1882.                 elem.toggleClass('active');
  1883.                 quiz.dialog.toggleClass('help');
  1884.                 quiz.showing_help = !quiz.showing_help;
  1885.                 break;
  1886.         }
  1887.         var qinfo = quiz.qinfo.load(quiz.index);
  1888.         if (quiz.showing_help && qinfo.answer.type === 'reading') play_audio(false /* force_play */);
  1889.     }
  1890.  
  1891.     //========================================================================
  1892.     // toggle_lightning()
  1893.     //------------------------------------------------------------------------
  1894.     function toggle_lightning() {
  1895.         var elem = $('#ss_quiz .settings .ss_lightning');
  1896.         elem.toggleClass('active');
  1897.         quiz.settings.lightning_mode = elem.hasClass('active');
  1898.         wkof.Settings.save('ss_quiz');
  1899.     }
  1900.  
  1901.     //========================================================================
  1902.     // toggle_pairing()
  1903.     //------------------------------------------------------------------------
  1904.     function toggle_pairing(e, initialize) {
  1905.         var elem_pair = $('#ss_quiz .settings .ss_pair');
  1906.         var elem_data = elem_pair.find('.data');
  1907.         var values = ['disabled', 'reading_first', 'meaning_first', 'random_order'];
  1908.         var value = Math.max(0, values.indexOf(quiz.settings.pairing));
  1909.  
  1910.         if (!initialize) value = (value + 1) % values.length;
  1911.         quiz.settings.pairing = value = values[value];
  1912.         wkof.Settings.save('ss_quiz')
  1913.  
  1914.         switch (value) {
  1915.             case 'disabled': elem_data.text('Disabled'); elem_pair.removeClass('active'); break;
  1916.             case 'reading_first': elem_data.text('Reading First'); elem_pair.addClass('active'); break;
  1917.             case 'meaning_first': elem_data.text('Meaning First'); elem_pair.addClass('active'); break;
  1918.             case 'random_order': elem_data.text('Random Order'); elem_pair.addClass('active'); break;
  1919.         }
  1920.         if (!initialize) quiz.start({keep_round_count:true});
  1921.     }
  1922.  
  1923.     //========================================================================
  1924.     // drag()
  1925.     //------------------------------------------------------------------------
  1926.     function drag(e) {
  1927.         var dlg = $(e.currentTarget).closest('.dialog');
  1928.         var pos = dlg.position();
  1929.         var ofs = {x: e.pageX-pos.left, y: e.pageY-pos.top};
  1930.         $('body')
  1931.         .on('mousemove.ss_quiz_drag touchmove.ss_quiz_drag', function(e){
  1932.             dlg.css({left: Math.max(0,e.pageX-ofs.x), top: Math.max(0,e.pageY-ofs.y)});
  1933.         })
  1934.         .on('mouseup.ss_quiz_drag touchend.ss_quiz_drag', function(e){
  1935.             $('body').off('.ss_quiz_drag');
  1936.         });
  1937.     }
  1938.  
  1939.     wkof.set_state('ss_quiz', 'ready');
  1940.  
  1941. })(window.ss_quiz);

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