From 4d699d8d47a98ef09148eaa7724757849a52ebf8 Mon Sep 17 00:00:00 2001
From: Yorhel <git@yorhel.nl>
Date: Tue, 17 Jul 2012 20:18:19 +0200
Subject: [PATCH] Added quick-and-dirty javascript dropdown search thing

---
 www/index.pl |   7 +-
 www/man.css  |   8 ++
 www/man.js   | 222 +++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 234 insertions(+), 3 deletions(-)

diff --git a/www/index.pl b/www/index.pl
index 415b041..9b8ad6d 100755
--- a/www/index.pl
+++ b/www/index.pl
@@ -475,10 +475,11 @@ sub xmlsearch {
   my $q = $self->reqGet('q')||'';
   my $man = $self->dbSearch($q, 20);
 
+  # The JS dropdown search expects this particular format.
   $self->resHeader('Content-Type' => 'text/xml; charset=UTF-8');
   xml;
   tag 'results';
-   tag 'man', %$_, undef for(@$man);
+   tag 'item', id => "$_->{name}.$_->{section}", %$_, undef for(@$man);
   end 'results';
 }
 
@@ -501,8 +502,8 @@ sub htmlHeader {
 
     div id => 'header';
      a href => '/', 'manned.org';
-     form;
-      input type => 'text', name => 'q';
+     form action => '/', method => 'get';
+      input type => 'text', name => 'q', id => 'q';
       input type => 'submit', value => ' ';
      end;
     end;
diff --git a/www/man.css b/www/man.css
index 4bca59c..dc23ff9 100644
--- a/www/man.css
+++ b/www/man.css
@@ -80,3 +80,11 @@ td { padding: 1px 5px; font-size: 12px; border-left: 1px solid #ccc; }
 pre, pre * { font-family: "Lucida Console", Monospace; font-size: 15px }
 pre b { color: #369; font-weight: normal; }
 
+#ds_box { position: absolute; top: 0; border: 1px solid $border$; border-top: none; background: #f0f8ff; cursor: pointer; z-index: 2 }
+#ds_box.hidden { display: none }
+#ds_box b { padding: 2px 0 0 10px; font-size: 12px; }
+#ds_box tr.selected { background: #fff; }
+#ds_box table { width: 100%; border: 0; background: none; margin: 0 }
+#ds_box td { border: 0; padding: 1px 5px }
+#ds_box i { padding-left: 5px; color: #aaa; font-style: normal }
+
diff --git a/www/man.js b/www/man.js
index 6a7b45c..4cb3269 100644
--- a/www/man.js
+++ b/www/man.js
@@ -3,6 +3,27 @@
 var expanded_icon = '▾';
 var collapsed_icon = '▸';
 
+var http_request = false;
+function ajax(url, func, async) {
+  if(!async && http_request)
+    http_request.abort();
+  var req = (window.ActiveXObject) ? new ActiveXObject('Microsoft.XMLHTTP') : new XMLHttpRequest();
+  if(req == null)
+    return alert("Your browser does not support the functionality this website requires.");
+  if(!async)
+    http_request = req;
+  req.onreadystatechange = function() {
+    if(!req || req.readyState != 4 || !req.responseText)
+      return;
+    if(req.status != 200)
+      return alert('Whoops, error! :(');
+    func(req);
+  };
+  url += (url.indexOf('?')>=0 ? ';' : '?')+(Math.floor(Math.random()*999)+1);
+  req.open('GET', url, true);
+  req.send(null);
+}
+
 function byId(n) {
   return document.getElementById(n)
 }
@@ -49,6 +70,20 @@ function tag() {
   }
   return el;
 }
+function addBody(el) {
+  if(document.body.appendChild)
+    document.body.appendChild(el);
+  else if(document.documentElement.appendChild)
+    document.documentElement.appendChild(el);
+  else if(document.appendChild)
+    document.appendChild(el);
+}
+function setContent() {
+  setText(arguments[0], '');
+  for(var i=1; i<arguments.length; i++)
+    if(arguments[i] != null)
+      arguments[0].appendChild(tag(arguments[i]));
+}
 function setText(obj, txt) {
   if(obj.textContent != null)
     obj.textContent = txt;
@@ -85,9 +120,196 @@ function setClass(obj, c, set) {
 }
 
 
+// Dropdown Search
+
+function dsInit(obj, url, trfunc, serfunc, retfunc, parfunc) {
+  obj.setAttribute('autocomplete', 'off');
+  obj.onkeydown = dsKeyDown;
+  obj.onblur = function() { setTimeout(function () { setClass(byId('ds_box'), 'hidden', true) }, 250) };
+  obj.ds_returnFunc = retfunc;
+  obj.ds_trFunc = trfunc;
+  obj.ds_serFunc = serfunc;
+  obj.ds_parFunc = parfunc;
+  obj.ds_searchURL = url;
+  obj.ds_selectedId = 0;
+  obj.ds_dosearch = null;
+  if(!byId('ds_box'))
+    addBody(tag('div', {id: 'ds_box', 'class':'hidden'}, tag('b', 'Loading...')));
+}
+
+function dsKeyDown(ev) {
+  var c = document.layers ? ev.which : document.all ? event.keyCode : ev.keyCode;
+  var obj = this;
+
+  if(c == 9) // tab
+    return true;
+
+  // do some processing when the enter key has been pressed
+  if(c == 13) {
+    var frm = obj;
+    while(frm && frm.nodeName.toLowerCase() != 'form')
+      frm = frm.parentNode;
+    if(frm) {
+      var oldsubmit = frm.onsubmit;
+      frm.onsubmit = function() { return false };
+      setTimeout(function() { frm.onsubmit = oldsubmit }, 100);
+    }
+
+    if(obj.ds_selectedId != 0)
+      obj.value = obj.ds_serFunc(byId('ds_box_'+obj.ds_selectedId).ds_itemData, obj);
+    if(obj.ds_returnFunc)
+      obj.ds_returnFunc(obj);
+
+    setClass(byId('ds_box'), 'hidden', true);
+    setContent(byId('ds_box'), tag('b', 'Loading...'));
+    obj.ds_selectedId = 0;
+    if(obj.ds_dosearch) {
+      clearTimeout(obj.ds_dosearch);
+      obj.ds_dosearch = null;
+    }
+
+    return false;
+  }
+
+  // process up/down keys
+  if(c == 38 || c == 40) {
+    var l = byName(byId('ds_box'), 'tr');
+    if(l.length < 1)
+      return true;
+
+    // get new selected id
+    if(obj.ds_selectedId == 0) {
+      if(c == 38) // up
+        obj.ds_selectedId = l[l.length-1].id.substr(7);
+      else
+        obj.ds_selectedId = l[0].id.substr(7);
+    } else {
+      var sel = null;
+      for(var i=0; i<l.length; i++)
+        if(l[i].id == 'ds_box_'+obj.ds_selectedId) {
+          if(c == 38) // up
+            sel = i>0 ? l[i-1] : l[l.length-1];
+          else
+            sel = l[i+1] ? l[i+1] : l[0];
+        }
+      obj.ds_selectedId = sel.id.substr(7);
+    }
+
+    // set selected class
+    for(var i=0; i<l.length; i++)
+      setClass(l[i], 'selected', l[i].id == 'ds_box_'+obj.ds_selectedId);
+    return true;
+  }
+
+  // perform search after a timeout
+  if(obj.ds_dosearch)
+    clearTimeout(obj.ds_dosearch);
+  obj.ds_dosearch = setTimeout(function() {
+    dsSearch(obj);
+  }, 500);
+
+  return true;
+}
+
+function dsSearch(obj) {
+  var box = byId('ds_box');
+  var val = obj.ds_parFunc ? obj.ds_parFunc(obj.value) : obj.value;
+
+  clearTimeout(obj.ds_dosearch);
+  obj.ds_dosearch = null;
+
+  // hide the ds_box div
+  if(val.length < 2) {
+    setClass(box, 'hidden', true);
+    setContent(box, tag('b', 'Loading...'));
+    obj.ds_selectedId = 0;
+    return;
+  }
+
+  // position the div
+  var ddx=0;
+  var ddy=obj.offsetHeight;
+  var o = obj;
+  do {
+    ddx += o.offsetLeft;
+    ddy += o.offsetTop;
+  } while(o = o.offsetParent);
+
+  box.style.position = 'absolute';
+  box.style.left = ddx+'px';
+  box.style.top = ddy+'px';
+  box.style.width = obj.offsetWidth+'px';
+  setClass(box, 'hidden', false);
+
+  // perform search
+  ajax(obj.ds_searchURL + encodeURIComponent(val), function(hr) {
+    dsResults(hr, obj);
+  });
+}
+
+function dsResults(hr, obj) {
+  var lst = hr.responseXML.getElementsByTagName('item');
+  var box = byId('ds_box');
+  if(lst.length < 1) {
+    setContent(box, tag('b', 'No results'));
+    obj.selectedId = 0;
+    return;
+  }
+
+  var tb = tag('tbody', null);
+  for(var i=0; i<lst.length; i++) {
+    var id = lst[i].getAttribute('id');
+    var tr = tag('tr', {id: 'ds_box_'+id, ds_itemData: lst[i]} );
+    setClass(tr, 'selected', obj.selectedId == id);
+
+    tr.onmouseover = function() {
+      obj.ds_selectedId = this.id.substr(7);
+      var l = byName(box, 'tr');
+      for(var j=0; j<l.length; j++)
+        setClass(l[j], 'selected', l[j].id == 'ds_box_'+obj.ds_selectedId);
+    };
+    tr.onmousedown = function() {
+      obj.value = obj.ds_serFunc(this.ds_itemData, obj);
+      if(obj.ds_returnFunc)
+        obj.ds_returnFunc();
+      setClass(box, 'hidden', true);
+      obj.ds_selectedId = 0;
+    };
+
+    obj.ds_trFunc(lst[i], tr);
+    tb.appendChild(tr);
+  }
+  setContent(box, tag('table', tb));
+
+  if(obj.ds_selectedId != 0 && !byId('ds_box_'+obj.ds_selectedId))
+    obj.ds_selectedId = 0;
+}
+
+
 
 /* What follows is specific to manned.org */
 
+// Search box
+searchRedir = false;
+dsInit(byId('q'), '/xml/search.xml?q=', function(item, tr) {
+    tr.appendChild(tag('td', item.getAttribute('name'), tag('i', '('+item.getAttribute('section')+')')));
+  },
+  function(item) {
+    searchRedir = true;
+    location.href = '/'+item.getAttribute('name')+'.'+item.getAttribute('section').substr(0,1);
+    return item.getAttribute('name')+'('+item.getAttribute('section')+')';
+  },
+  function() {
+    if(!searchRedir) {
+      var frm=byId('q');
+      while(frm && frm.nodeName.toLowerCase() != 'form')
+        frm = frm.parentNode;
+      frm.submit();
+    }
+  }
+);
+
+
 // TODO: Fix the 'pkg' link
 // TODO: Keep same view when switching to different version of the same man page