searchlocal.js

   1 var filterupdate;
   2 var filtertoggles = document.body.classList !== undefined;
   3
   4 function filtercell(el, set, action) {
   5         if (set === undefined) return;
   6         switch (action) {
   7                 case 'focus':
   8                         el.classList[set ? 'add' : 'remove'](action);
   9                         break;
  10                 case 'target':
  11                         if (set) el.classList.toggle(action);
  12                         break;
  13                 case 'remove':
  14                         if (set) el.style.display = 'none';
  15                         break;
  16                 case 'add':
  17                         if (set) el.style.display = '';
  18                         break;
  19                 case 'toggle':
  20                         if (set) el.style.display = el.style.display == 'none' ? '' : 'none';
  21                         break;
  22                 case 'filter':
  23                         el.style.display = set ? '' : 'none';
  24                         if (filtertoggles) el.classList.remove('focus');
  25                         break;
  26                 default: // reset
  27                         el.classList.remove('focus');
  28                         el.classList.remove('target');
  29         }
  30 }
  31
  32 function filtercols(table, match, action) {
  33         var matchloc = [];
  34         for (var y = 0; y < table.rows.length; y++) {
  35                 var loc = 0;
  36                 for (var x = 0; x < table.rows[y].cells.length; x++) {
  37                         var cell = table.rows[y].cells[x];
  38                         if (y == 0) {
  39                                 var res = match(cell);
  40                                 for (var i = loc; i < loc + cell.colSpan; i++) matchloc[i] = res;
  41                                 filtercell(table.children.item(x), res, action); // colgroup
  42                         }
  43                         filtercell(cell, matchloc[loc], action);
  44                         loc += cell.colSpan;
  45                 }
  46         }
  47 }
  48
  49 function filterrows(table, match, action) {
  50         var rows = table.tBodies[0].rows;
  51         for (var i = 0; i < rows.length; i++) {
  52                 filtercell(rows[i], match && match(rows[i]), action);
  53         }
  54 }
  55
  56 function filtertable(query, action) {
  57         filterupdate = undefined;
  58         if (query === undefined) query = document.getElementById('search').q.value;
  59         var table = document.getElementsByTagName('TABLE')[0];
  60
  61         if (!action) {
  62                 var match = /^([-+?=]?)(.*)/.exec(query);
  63                 switch (match[1]) {
  64                         case '+': action = 'add';    break;
  65                         case '-': action = 'remove'; break;
  66                         case '?': action = 'toggle'; break;
  67                         case '=': action = 'filter'; break;
  68                 }
  69                 query = match[2];
  70         }
  71
  72         if (query == '' && action == 'add') {
  73                 // restore all columns if explicitly adding all ("+")
  74                 filtercols(table, function(){return true}, 'add');
  75                 // continue to restore rows
  76         }
  77         if (/^[a-z_]+$/.test(query) && document.querySelector('.b-a-'+query)) {
  78                 // column if class b-a-* exists
  79                 var match = function(th) {
  80                         if (!/\bb-a-/.test(th.className)) return;
  81                         return new RegExp('-'+query+'\\b').test(th.className);
  82                 }
  83                 return filtercols(table, match, action || 'toggle');
  84         }
  85
  86         if (/^[A-Z0-9 ]{2,}$/.test(query)) {
  87                 // category title if all uppercase
  88                 var match = function(row) {
  89                         return row.cells[0].title.match(query, 'i');
  90                 };
  91         }
  92         else if (numquery = /^([<>])(\d+)$/.exec(query)) {
  93                 // support percentage if numeric comparison
  94                 var match = function(row) {
  95                         var pct = row.cells[row.cells.length - 1].textContent;
  96                         pct -= numquery[2]; // compare to query
  97                         return numquery[1] == '<' ? pct < 0 : pct >= 0;
  98                 };
  99         }
 100         else if (action == 'focus' && query.length <= 1) {
 101                 // prevent superfluous highlighting
 102                 var match = false;
 103         }
 104         else {
 105                 // title text (case-insensitive unless caps in input)
 106                 var match = function(row) {
 107                         return row.cells[1].textContent.match(query, /[A-Z]/.test(query) ? '' : 'i');
 108                 };
 109         }
 110         filterrows(table, match, action || 'filter');
 111 }
 112
 113 function newelement(tagname, attrlist, childlist) {
 114         if (!attrlist) return document.createTextNode(tagname);
 115         var el = document.createElement(tagname);
 116         for (var name in attrlist)
 117                 el.setAttribute(name, attrlist[name]);
 118         if (childlist) for (var i = 0; i < childlist.length; i++)
 119                 if (childlist[i]) el.appendChild(childlist[i]);
 120         return el;
 121 }
 122
 123 function prependsearch(target) {
 124         target.parentNode.insertBefore(newelement(
 125                 'form', {
 126                         id: 'search',
 127                         'class': 'aside',
 128                         onsubmit: "filtertable(this.q.value); this.q.value = ''; return false",
 129                 },
 130                 [
 131                         newelement('input', {
 132                                 type: 'search',
 133                                 name: 'q',
 134                                 onkeyup: "if (filtertoggles && !filterupdate) filterupdate = "
 135                                         + "window.setTimeout(filtertable, 300, undefined, 'focus')",
 136                         }),
 137                         filtertoggles && newelement('input', {
 138                                 type: 'button',
 139                                 value: 'toggle',
 140                                 onclick: "filtertable(this.form.q.value, 'target')",
 141                         }),
 142                         newelement('input', {type:'submit', value:'filter'}),
 143                 ]
 144         ), target);
 145 }
 146