author | Dan |
Sun, 20 Jan 2008 20:27:26 -0500 | |
changeset 357 | 1d0152181585 |
parent 263 | d57af0b0302e |
child 367 | ee4defc9321a |
permissions | -rw-r--r-- |
1 | 1 |
/* |
2 |
* Auto-completing page/username fields |
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263
d57af0b0302e
Major improvements in the security of the CAPTCHA system (no SQL injection or anything like that); fixed denied form submission due to _af_acting on form object wrongly switched to true
Dan
parents:
184
diff
changeset
|
3 |
* NOTE: A more efficient version of the username field is used for Mozilla browsers. The updated code is in autofill.js. |
1 | 4 |
*/ |
5 |
||
6 |
// The ultimate Javascript app: AJAX auto-completion, which responds to up/down arrow keys, the enter key, and the escape key |
|
7 |
// The idea was pilfered mercilessly from vBulletin, but uses about 8 |
|
8 |
// bytes of vB code. All the rest was coded by me, Mr. Javascript Newbie... |
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9 |
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10 |
// ...in about 8 hours. |
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11 |
// You folks better like this stuff. |
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12 |
||
13 |
function nameCompleteEventHandler(e) |
|
14 |
{ |
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if(!e) e = window.event; |
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16 |
switch(e.keyCode) |
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17 |
{ |
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18 |
case 38: // up |
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unSelectMove('up'); |
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20 |
break; |
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21 |
case 40: // down |
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22 |
unSelectMove('down'); |
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break; |
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24 |
case 27: // escape |
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25 |
case 9: // tab |
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destroyUsernameDropdowns(); |
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break; |
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case 13: // enter |
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unSelect(); |
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break; |
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default: return false; break; |
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32 |
} |
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33 |
return true; |
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34 |
} |
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35 |
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36 |
function unSelectMove(dir) |
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37 |
{ |
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38 |
if(submitAuthorized) return false; |
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39 |
var thediv = document.getElementById(unObjDivCurrentId); |
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40 |
thetable = thediv.firstChild; |
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41 |
cel = thetable.firstChild.firstChild; |
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d = true; |
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index = false; |
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44 |
changed = false; |
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45 |
// Object of the game: extract the username, determine its index in the userlist array, and then color the menu items and set unObjCurrentSelection |
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while(d) // Set to false if an exception occurs or if we arrive at our destination |
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{ |
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48 |
//* |
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49 |
if(!cel) d=false; |
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celbak = cel; |
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cel = cel.nextSibling; |
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if(!cel) d=false; |
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53 |
try { |
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54 |
if(cel.firstChild.nextSibling) html = cel.firstChild.nextSibling.innerHTML; |
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else html = cel.firstChild.innerHTML; |
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cel.firstChild.className = 'row1'; |
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if(cel.firstChild.nextSibling) cel.firstChild.nextSibling.className = 'row1'; |
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thename = html.substr(7, html.length-15); |
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// FINALLY! we have extracted the username |
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// Now get its position in the userlist array |
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if(thename == unObjCurrentSelection) |
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{ |
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index = parseInt(in_array(thename, userlist)); |
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} |
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65 |
if(typeof(index) == 'number') |
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{ |
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if(dir=='down') |
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n = index+1; |
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else if(dir == 'up') |
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n = index - 1; |
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71 |
||
72 |
// Try to trap moving the selection up or down beyond the top of bottom |
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if(n > userlist.length-1 || n < 0) |
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{ |
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cel.firstChild.className = 'row2'; |
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if(cel.firstChild.nextSibling) cel.firstChild.nextSibling.className = 'row2'; |
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return; |
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} |
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if(dir=='down') no=cel.nextSibling; |
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else if(dir=='up') no=cel.previousSibling; |
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no.firstChild.className = 'row2'; |
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if(no.firstChild.nextSibling) no.firstChild.nextSibling.className = 'row2'; |
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if(no.firstChild.id) |
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{ |
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scroll = getScrollOffset() + getHeight(); |
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elemht = getElementHeight(no.firstChild.id); |
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elemoff = fetch_offset(no.firstChild); |
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whereto = elemoff['top'] + elemht; |
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if(whereto > scroll) |
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{ |
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window.location.hash = '#'+no.firstChild.id; |
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unObj.focus(); |
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94 |
} |
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} |
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cel=cel.nextSibling; |
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unObjCurrentSelection = userlist[n]; |
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index = false; |
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changed = true; |
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return; |
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101 |
} |
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102 |
} catch(e) { } |
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//*/ d = false; |
|
104 |
} |
|
105 |
} |
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106 |
||
107 |
function unSelect() |
|
108 |
{ |
|
109 |
if(!unObj || submitAuthorized) return false; |
|
110 |
if ( unObjCurrentSelection ) |
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111 |
unObj.value = unObjCurrentSelection; |
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destroyUsernameDropdowns(); |
|
113 |
} |
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114 |
||
115 |
function in_array(needle, haystack) |
|
116 |
{ |
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117 |
for(var i in haystack) |
|
118 |
{ |
|
119 |
if(haystack[i] == needle) return i; |
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120 |
} |
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return false; |
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122 |
} |
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123 |
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function ajaxUserNameComplete(o) |
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{ |
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if(!o) {destroyUsernameDropdowns(); return;} |
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if(!o.value) {destroyUsernameDropdowns(); return;} |
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if(o.value.length < 3) {destroyUsernameDropdowns(); return;} |
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//if(IE) return; // This control doesn't work in IE. Yes, it's true! document.createElement doesn't work. |
|
130 |
if(!o.id) |
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131 |
{ |
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o.id = 'usernametextboxobj_' + Math.floor(Math.random() * 10000000); |
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} |
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unObj = o; |
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o.setAttribute("autocomplete","off"); |
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o.onkeyup = function(e, o) { o=unObj; if(!nameCompleteEventHandler(e)) ajaxUserNameComplete(o); } |
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val = escape(o.value).replace('+', '%2B'); |
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ajaxGet(stdAjaxPrefix+'&_mode=fillusername&name='+val, function() |
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{ |
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if(ajax.readyState==4) |
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{ |
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// Determine the appropriate left/top positions, then create a div to use for the drop-down list |
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// The trick here is to be able to make the div dynamically destroy itself depending on how far the user's mouse is from it |
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destroyUsernameDropdowns(); |
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off = fetch_offset(unObj); |
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dim = fetch_dimensions(unObj); |
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left = off['left']; |
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i1 = off['top']; |
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i2 = dim['h']; |
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var top = 0; |
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top = i1 + i2; |
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var thediv = document.createElement('div'); |
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thediv.className = 'tblholder'; |
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thediv.style.marginTop = '0px'; |
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thediv.style.position = 'absolute'; |
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thediv.style.top = top + 'px'; |
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thediv.style.left = left + 'px'; |
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thediv.style.zIndex = getHighestZ() + 2; |
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id = 'usernamehoverobj_' + Math.floor(Math.random() * 10000000); |
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unObjDivCurrentId = id; |
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thediv.id = id; |
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unObj.onblur = function() { destroyUsernameDropdowns(); } |
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||
184
d74ff822acc9
Replaced autocompleting username with a much more efficient algorithm and caching system
Dan
parents:
73
diff
changeset
|
164 |
var response = String(ajax.responseText) + ' '; |
d74ff822acc9
Replaced autocompleting username with a much more efficient algorithm and caching system
Dan
parents:
73
diff
changeset
|
165 |
if ( response.substr(0,1) != '{' ) |
d74ff822acc9
Replaced autocompleting username with a much more efficient algorithm and caching system
Dan
parents:
73
diff
changeset
|
166 |
{ |
d74ff822acc9
Replaced autocompleting username with a much more efficient algorithm and caching system
Dan
parents:
73
diff
changeset
|
167 |
new messagebox(MB_OK|MB_ICONSTOP, 'Invalid response', 'Invalid or unexpected JSON response from server:<pre>' + ajax.responseText + '</pre>'); |
d74ff822acc9
Replaced autocompleting username with a much more efficient algorithm and caching system
Dan
parents:
73
diff
changeset
|
168 |
return false; |
d74ff822acc9
Replaced autocompleting username with a much more efficient algorithm and caching system
Dan
parents:
73
diff
changeset
|
169 |
} |
d74ff822acc9
Replaced autocompleting username with a much more efficient algorithm and caching system
Dan
parents:
73
diff
changeset
|
170 |
|
d74ff822acc9
Replaced autocompleting username with a much more efficient algorithm and caching system
Dan
parents:
73
diff
changeset
|
171 |
response = parseJSON(response); |
d74ff822acc9
Replaced autocompleting username with a much more efficient algorithm and caching system
Dan
parents:
73
diff
changeset
|
172 |
var errorstring = false; |
d74ff822acc9
Replaced autocompleting username with a much more efficient algorithm and caching system
Dan
parents:
73
diff
changeset
|
173 |
if ( response.mode == 'error' ) |
d74ff822acc9
Replaced autocompleting username with a much more efficient algorithm and caching system
Dan
parents:
73
diff
changeset
|
174 |
{ |
d74ff822acc9
Replaced autocompleting username with a much more efficient algorithm and caching system
Dan
parents:
73
diff
changeset
|
175 |
errorstring = response.error; |
d74ff822acc9
Replaced autocompleting username with a much more efficient algorithm and caching system
Dan
parents:
73
diff
changeset
|
176 |
} |
d74ff822acc9
Replaced autocompleting username with a much more efficient algorithm and caching system
Dan
parents:
73
diff
changeset
|
177 |
else |
d74ff822acc9
Replaced autocompleting username with a much more efficient algorithm and caching system
Dan
parents:
73
diff
changeset
|
178 |
{ |
d74ff822acc9
Replaced autocompleting username with a much more efficient algorithm and caching system
Dan
parents:
73
diff
changeset
|
179 |
var userlist = response.users_real; |
d74ff822acc9
Replaced autocompleting username with a much more efficient algorithm and caching system
Dan
parents:
73
diff
changeset
|
180 |
} |
d74ff822acc9
Replaced autocompleting username with a much more efficient algorithm and caching system
Dan
parents:
73
diff
changeset
|
181 |
|
1 | 182 |
if(errorstring) |
183 |
{ |
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184 |
html = '<span style="color: #555; padding: 4px;">'+errorstring+'</span>'; |
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185 |
} |
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else |
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{ |
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html = '<table border="0" cellspacing="1" cellpadding="3" style="width: auto;"><tr><th><small>Username matches</small></th></tr>'; |
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cls = 'row2'; |
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unObjCurrentSelection = userlist[0]; |
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for(i=0;i<userlist.length;i++) |
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{ |
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tmpnam = 'listobjnode_'+Math.floor(Math.random() * 10000000); |
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html = html + '<tr><td id="'+tmpnam+'" class="'+cls+'" style="cursor: pointer;" onclick="document.getElementById(\''+unObj.id+'\').value=\''+userlist[i]+'\';destroyUsernameDropdowns();"><small>'+userlist[i]+'</small></td></tr>'; |
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195 |
if(cls=='row2') cls='row1'; |
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} |
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html = html + '</table>'; |
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} |
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199 |
||
200 |
thediv.innerHTML = html; |
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var body = document.getElementsByTagName('body'); |
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body = body[0]; |
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unSelectMenuOn = true; |
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submitAuthorized = false; |
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body.appendChild(thediv); |
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206 |
} |
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}); |
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} |
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209 |
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210 |
function ajaxPageNameComplete(o) |
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{ |
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212 |
if(!o) {destroyUsernameDropdowns(); return;} |
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if(!o.value) {destroyUsernameDropdowns(); return;} |
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if(o.value.length < 3) {destroyUsernameDropdowns(); return;} |
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215 |
if(IE) return; // This control doesn't work in IE. Yes, it's true! document.createElement doesn't work. |
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216 |
if(!o.id) |
|
217 |
{ |
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218 |
o.id = 'usernametextboxobj_' + Math.floor(Math.random() * 10000000); |
|
219 |
} |
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220 |
o.setAttribute("autocomplete","off"); |
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unObj = o; |
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o.onkeyup = function(e, o) { o=unObj; if(!nameCompleteEventHandler(e)) ajaxPageNameComplete(o); } |
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val = escape(o.value).replace('+', '%2B'); |
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ajaxGet(stdAjaxPrefix+'&_mode=fillpagename&name='+val, function() |
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{ |
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226 |
if(!ajax) return; |
|
227 |
if(ajax.readyState==4) |
|
228 |
{ |
|
229 |
// Determine the appropriate left/top positions, then create a div to use for the drop-down list |
|
230 |
// The trick here is to be able to make the div dynamically destroy itself depending on how far the user's mouse is from it |
|
231 |
destroyUsernameDropdowns(); |
|
232 |
off = fetch_offset(unObj); |
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233 |
dim = fetch_dimensions(unObj); |
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234 |
left = off['left']; |
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235 |
top = off['top'] + dim['h']; |
|
236 |
var thediv = document.createElement('div'); |
|
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thediv.className = 'tblholder'; |
|
238 |
thediv.style.marginTop = '0px'; |
|
239 |
thediv.style.position = 'absolute'; |
|
240 |
thediv.style.top = top + 'px'; |
|
241 |
thediv.style.left = left + 'px'; |
|
242 |
thediv.style.zIndex = getHighestZ() + 2; |
|
243 |
id = 'usernamehoverobj_' + Math.floor(Math.random() * 10000000); |
|
244 |
unObjDivCurrentId = id; |
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245 |
thediv.id = id; |
|
246 |
||
247 |
eval(ajax.responseText); |
|
248 |
if(errorstring) |
|
249 |
{ |
|
250 |
html = '<span style="color: #555; padding: 4px;">'+errorstring+'</span>'; |
|
251 |
} |
|
252 |
else |
|
253 |
{ |
|
254 |
html = '<table border="0" cellspacing="1" cellpadding="3" style="width: auto;"><tr><th colspan="2">Page name matches</th></tr><tr><th><small>Page title</small></th><th><small>Page ID</small></th></tr>'; |
|
255 |
cls = 'row2'; |
|
256 |
unObjCurrentSelection = userlist[0]; |
|
257 |
for(i=0;i<userlist.length;i++) |
|
258 |
{ |
|
259 |
tmpnam = 'listobjnode_'+Math.floor(Math.random() * 10000000); |
|
260 |
html = html + '<tr><td id="'+tmpnam+'" class="'+cls+'" style="cursor: pointer;" onclick="document.getElementById(\''+unObj.id+'\').value=\''+userlist[i]+'\';destroyUsernameDropdowns();"><small>'+namelist[i]+'</small></td><td class="'+cls+'" style="cursor: pointer;" onclick="document.getElementById(\''+unObj.id+'\').value=\''+userlist[i]+'\';destroyUsernameDropdowns();"><small>'+userlist[i]+'</small></td></tr>'; |
|
261 |
if(cls=='row2') cls='row1'; |
|
262 |
} |
|
263 |
html = html + '</table>'; |
|
264 |
} |
|
265 |
||
266 |
thediv.innerHTML = html; |
|
267 |
var body = document.getElementsByTagName('body'); |
|
268 |
body = body[0]; |
|
269 |
unSelectMenuOn = true; |
|
270 |
submitAuthorized = false; |
|
271 |
body.appendChild(thediv); |
|
272 |
} |
|
273 |
}); |
|
274 |
} |
|
275 |
||
276 |
function destroyUsernameDropdowns() |
|
277 |
{ |
|
278 |
var divs = document.getElementsByTagName('div'); |
|
279 |
var prefix = 'usernamehoverobj_'; |
|
280 |
for(i=0;i<divs.length;i++) |
|
281 |
{ |
|
282 |
if ( divs[i].id ) |
|
283 |
{ |
|
284 |
if(divs[i].id.substr(0, prefix.length)==prefix) |
|
285 |
{ |
|
286 |
divs[i].innerHTML = ''; |
|
287 |
divs[i].style.display = 'none'; |
|
288 |
} |
|
289 |
} |
|
290 |
} |
|
291 |
unSelectMenuOn = false; |
|
292 |
unObjDivCurrentId = false; |
|
293 |
unObjCurrentSelection = false; |
|
294 |
submitAuthorized = true; |
|
295 |
} |
|
296 |
||
297 |
function get_parent_form(o) |
|
298 |
{ |
|
299 |
if ( !o.parentNode ) |
|
300 |
return false; |
|
301 |
if ( o.tagName == 'FORM' ) |
|
302 |
return o; |
|
303 |
var p = o.parentNode; |
|
304 |
while(true) |
|
305 |
{ |
|
306 |
if ( p.tagName == 'FORM' ) |
|
307 |
return p; |
|
308 |
else if ( !p ) |
|
309 |
return false; |
|
310 |
else |
|
311 |
p = p.parentNode; |
|
312 |
} |
|
313 |
} |
|
314 |