searchlocal.js

   1 var filterupdate;
   2
   3 function filtercell(el, set, action) {
   4         switch (action) {
   5                 case 'focus':
   6                         el.classList[set ? 'add' : 'remove'](action);
   7                         break;
   8                 case 'target':
   9                         if (set) el.classList.toggle(action);
  10                         break;
  11                 case 'remove':
  12                         if (set) el.style.display = 'none';
  13                         break;
  14                 case 'add':
  15                         if (set) el.style.display = '';
  16                         break;
  17                 case 'toggle':
  18                         if (set) el.style.display = el.style.display == 'none' ? '' : 'none';
  19                         break;
  20                 case 'filter':
  21                         el.style.display = set ? '' : 'none';
  22                         if (!Element.prototype.hasOwnProperty('classList')) return;
  23                         el.classList.remove('focus');
  24                         break;
  25                 default: // reset
  26                         el.classList.remove('focus');
  27                         el.classList.remove('target');
  28         }
  29 }
  30
  31 function filtercols(table, match, action) {
  32         var matchloc = [];
  33         for (var y = 0; y < table.rows.length; y++) {
  34                 var loc = 0;
  35                 for (var x = 0; x < table.rows[y].cells.length; x++) {
  36                         var cell = table.rows[y].cells[x];
  37                         if (y == 0 && match(cell)) {
  38                                 for (var i = loc; i < loc + cell.colSpan; i++) matchloc[i] = true;
  39                                 filtercell(table.children.item(x), true, action); // colgroup
  40                         }
  41                         filtercell(cell, matchloc[loc], action);
  42                         loc += cell.colSpan;
  43                 }
  44         }
  45 }
  46
  47 function filterrows(table, match, action) {
  48         var rows = table.tBodies[0].rows;
  49         for (var i = 0; i < rows.length; i++) {
  50                 filtercell(rows[i], match && match(rows[i]), action);
  51         }
  52 }
  53
  54 function filtertable(query, action) {
  55         filterupdate = undefined;
  56         if (query === undefined) query = document.getElementById('search').q.value;
  57         var table = document.getElementsByTagName('TABLE')[0];
  58
  59         if (!action) {
  60                 var match = /^([-+?=]?)(.*)/.exec(query);
  61                 switch (match[1]) {
  62                         case '+': action = 'add';    break;
  63                         case '-': action = 'remove'; break;
  64                         case '?': action = 'toggle'; break;
  65                         case '=': action = 'filter'; break;
  66                 }
  67                 query = match[2];
  68         }
  69
  70         if (query == '' && action == 'add') {
  71                 // restore all columns if explicitly adding all ("+")
  72                 filtercols(table, function(){return true}, 'add');
  73                 // continue to restore rows
  74         }
  75         if (/^[a-z_]+$/.test(query) && document.querySelector('.b-a-'+query)) {
  76                 // column if class b-a-* exists
  77                 var match = function(th) {
  78                         return new RegExp('-'+query+'\\b').test(th.className);
  79                 }
  80                 return filtercols(table, match, action || 'toggle');
  81         }
  82
  83         if (/^[A-Z0-9 ]{2,}$/.test(query)) {
  84                 // category title if all uppercase
  85                 var match = function(row) {
  86                         return row.cells[0].title.match(query, 'i');
  87                 };
  88         }
  89         else if (numquery = /^([<>])(\d+)$/.exec(query)) {
  90                 // support percentage if numeric comparison
  91                 var match = function(row) {
  92                         var pct = row.cells[row.cells.length - 1].textContent;
  93                         pct -= numquery[2]; // compare to query
  94                         return numquery[1] == '<' ? pct < 0 : pct >= 0;
  95                 };
  96         }
  97         else if (action == 'focus' && query.length <= 1) {
  98                 // prevent superfluous highlighting
  99                 var match = false;
 100         }
 101         else {
 102                 // title text (case-insensitive unless caps in input)
 103                 var match = function(row) {
 104                         return row.cells[1].textContent.match(query, /[A-Z]/.test(query) ? '' : 'i');
 105                 };
 106         }
 107         filterrows(table, match, action || 'filter');
 108 }
 109
 110 function newelement(tagname, attrlist, childlist) {
 111         if (!attrlist) return document.createTextNode(tagname);
 112         var el = document.createElement(tagname);
 113         for (var name in attrlist)
 114                 el.setAttribute(name, attrlist[name]);
 115         if (childlist) for (var i = 0; i < childlist.length; i++)
 116                 el.appendChild(childlist[i]);
 117         return el;
 118 }
 119
 120 function prependsearch(target) {
 121         target.parentNode.insertBefore(newelement(
 122                 'form', {
 123                         id: 'search',
 124                         'class': 'aside',
 125                         onsubmit: "filtertable(this.q.value); this.q.value = ''; return false",
 126                 },
 127                 [
 128                         newelement('input', {
 129                                 type: 'search',
 130                                 name: 'q',
 131                                 onkeyup: "if (!filterupdate) filterupdate = "
 132                                         + "window.setTimeout(filtertable, 300, undefined, 'focus')",
 133                         }),
 134                         newelement('input', {
 135                                 type: 'button',
 136                                 value: 'toggle',
 137                                 onclick: "filtertable(this.form.q.value, 'target')",
 138                         }),
 139                         newelement('input', {type:'submit', value:'filter'}),
 140                 ]
 141         ), target);
 142 }
 143