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I'm not really into JS, could you tell me what's wrong with this code? I tried to add this but an error occurs "Error at line 74, character 3: Parse error. ')' expected". I don't really know what to repair.
<script id="gtm-scroll-tracking" type="text/javascript">
; (function (document, window, config) {
// Browser dependencies, script fails silently
if (!document.querySelector || !document.body.getBoundingClientRect) {
return false;
}
// Get our dataLayer ready, in case we're not in GTM or we've got a special name
var dataLayerName = config.dataLayerName || 'dataLayer';
var dataLayer = window[dataLayerName] || (window[dataLayerName] = []);
var cache = {};
// Initialize our distances, for later
config.distances = config.distances || {};
checkDepth();
addEvent(window, 'scroll', throttle(checkDepth, 500));
function getMarks(_docHeight, _offset) {
var marks = {};
var percents = [];
var pixels = []
if (config.distances.percentages) {
if (config.distances.percentages.each) {
percents = percents.concat(config.distances.percentages.each);
}
if (config.distances.percentages.every) {
var _every = every_(config.distances.percentages.every, 100);
percents = percents.concat(_every);
}
}
if (config.distances.pixels) {
if (config.distances.pixels.each) {
pixels = pixels.concat(config.distances.pixels.each);
}
if (config.distances.pixels.every) {
var _every = every_(config.distances.pixels.every, _docHeight);
pixels = pixels.concat(_every);
}
}
marks = addMarks_(marks, percents, '%', _docHeight, _offset);
marks = addMarks_(marks, pixels, 'px', _docHeight, _offset);
return marks;
}
function addMarks_(marks, points, symbol, _docHeight, _offset) {
var i;
for (i = 0; i < points.length; i++) {
var _point = parseInt(points[i], 10);
var height = symbol !== '%' ? _point + _offset : _docHeight *
(_point / 100) + _offset;
var mark = _point + symbol;
if (height <= _docHeight + _offset) { marks[mark] = height; }
}
return marks;
}
function every_(n, total) {
var n = parseInt(n, 10);
var _num = total / n;
var arr = [];
for (i = 1; i < _num + 1; i++) { arr.push(i * n); }
return arr;
}
function checkDepth() {
var _bottom = parseBorder_(config.bottom);
var _top = parseBorder_(config.top);
var height = docHeight(_bottom, _top);
var marks = getMarks(height, (_top || 0));
var _curr = currentPosition();
for (key in marks) {
if (_curr > marks[key] && !cache[key]) {
cache[key] = true;
fireAnalyticsEvent(key);
}
}
}
function fireAnalyticsEvent(distance) {
dataLayer.push({
'event': 'scrollTracking',
'attributes': { 'distance': distance }
});
}
}
function parseBorder_(border) {
if (typeof border === 'Number' || parseInt(border, 10)) {
return parseInt(border, 10);
}
try {
// If we have an element or a query selector, poll getBoundingClientRect
var el = border.nodeType && border.nodeType === 1 ? border :
document.querySelector(border);
var docTop = document.body.getBoundingClientRect().top;
var _elTop = Math.floor(el.getBoundingClientRect().top - docTop);
return _elTop;
} catch (e) { return void (0); }
}
// Adapted from
https://developer.mozilla.org/en-US/docs/Web/API/Window/scrollY
function currentPosition() {
var supportPageOffset = window.pageXOffset !== undefined;
var isCSS1Compat = ((document.compatMode || "") === "CSS1Compat");
var currScrollTop = supportPageOffset ?
window.pageYOffset :
isCSS1Compat ?
document.documentElement.scrollTop :
document.body.scrollTop;
return parseInt(currScrollTop, 10) + parseInt(viewportHeight(), 10);
}
function viewportHeight() {
var elem = (document.compatMode === "CSS1Compat") ?
document.documentElement :
document.body;
return elem.clientHeight;
}
function docHeight(_bottom, _top) {
var body = document.body;
var html = document.documentElement;
var height = Math.max(body.scrollHeight, body.offsetHeight,
html.clientHeight, html.scrollHeight, html.offsetHeight);
if (_top) { height = height - _top; }
if (_bottom) { height = _bottom - _top; }
return height - 5;
}
/*
* Throttle function borrowed from:
* Underscore.js 1.5.2
* http://underscorejs.org
*
(c) 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative
Reporters & Editors
* Underscore may be freely distributed under the MIT license.
*/
function throttle(func, wait) {
var context, args, result;
var timeout = null;
var previous = 0;
var later = function () {
previous = new Date;
timeout = null;
result = func.apply(context, args);
};
return function () {
var now = new Date;
if (!previous) previous = now;
var remaining = wait - (now - previous);
context = this;
args = arguments;
if (remaining <= 0) {
clearTimeout(timeout);
timeout = null;
previous = now;
result = func.apply(context, args);
} else if (!timeout) {
timeout = setTimeout(later, remaining);
}
return result;
};
}
// Cross-browser compliant event listener
function addEvent(el, evt, fn) {
if (el.addEventListener) { return el.addEventListener(evt, fn); }
if (el.attachEvent) {
return el.attachEvent('on' + evt, function (evt) {
// Call the event to ensure uniform 'this' handling, pass it event
fn.call(el, evt);
});
}
if (typeof el['on' + evt] === 'undefined' || el['on' + evt] === null) {
return el['on' + evt] = function (evt) {
// Call the event to ensure uniform 'this' handling, pass it event
fn.call(el, evt); \
}
}
}
})(document, window,
{
// False if you just use the default dataLayer variable, otherwise enter it here
'dataLayerName': false,
'distances': {
// Configure percentages of page you'd like to see if users scroll past
'percentages': {
'each': [10, 90],
'every': 25
},
// Configure for pixel measurements of page you'd like to see if users scroll past
'pixels': {
'each': [],
'every': null
}
},
// Accepts a number, DOM element, or query selector to determine the top of the scrolling area
'top': null,
// Accepts a number, DOM element, or query selector to determine the bottom of the scrolling area
'bottom': null,
});
</script>
While trying to preview (debug), the tool tells me:
Error at line 74, character 3: Parse error. ')' expected
I have problem with removing a timer while it not being used anymore in javascript ?
let say we have a variable tm for the timer and set it with window.setInterval, while it still running we replace it by a new setInterval, how possible to get rid of the first setInterval ?
example code
var tm = setInterval(function(){
console.log('tm1')
}, 10);
tm = setInterval(function(){
console.log('tm2')
}, 10)
this is the real problem
motion:function(ele,cssStart,cssEnd,duration,tangent, easing,loop, complete){
if(ele==null||typeof cssEnd !== 'string') throw new TypeError();
if(!$hd.isElement(ele) || !$hd(ele).isExists()) throw new TypeError();
var validRules = /(left|top|width|color|height|background-color|margin-left|margin-right|margin-top|margin-botom|border-color|padding-left|padding-right|padding-top|border-bottom-width|border-top-width|border-left-width|border-right-width|border-bottom-color|border-top-color|border-left-color|border-right-color|padding-bottom|border-width|opacity|font-size)\s?(?=:).[^;]*(?=;?)/gim;
// filtering css input
cssEnd = cssEnd.replace(/\s{2,}|\n|\t/gim,'').replace(/\s?(:)\s?/gi,'$1').match(validRules);
cssStart = !cssStart?[]:cssStart.replace(/\s{2,}|\n|\t/gim,'').replace(/\s(:)\s/gi,'$1').match(validRules);
if(!cssEnd) throw new Error('invalid css rules, please refer to the documentation about the valid css rules for animation');
// creating properties
var _cssEnd = [],
_paused = false,
_cssStart = [],
_tm = null,
_step,
_complete = typeof complete ==='function'?complete:null,
_loop = 0,
_easing = typeof easing ==='string'?easing.match(/^easein|easeout|easeinout$/)?easing:'easein':'easein',
_tangent = typeof tangent ==='string'?tangent in hd.classes.motionTangents ? tangent:'linear':'linear';
this.ele = $hd(ele),
this.duration = isNaN(duration)?1:parseFloat(duration),
this.loop = isNaN(loop)?0:parseInt(loop),
this.isPlaying = false;
this.complete = false;
// verifying the css rules of the end point
var verify = function(cssStart, cssEnd){
for (var i = 0; i < cssEnd.length; i++) {
var colorPattern = /#[a-z0-9]+|rgba?\s?\(([0-9]{1,3}\s?,\s?)+((([0-9]+)?(\.)?([0-9]+))+)?\)/gi,
name = cssEnd[i].replace(/^([a-z0-9-]+)\s?(?=:).*/gi,'$1'),
value = cssEnd[i].replace(/^[a-z0-9-]+\s?:(.*)/gi,'$1'),
startIndex = $hd(cssStart).inspectData(name+':',false),
startValue = !startIndex.length?this.ele.getcss(name):cssStart[startIndex].replace(/^[a-z0-9-]+:(.*)/gi,'$1');
if(value=='') continue;
// parsing values
if(name.match(/color/i)){
//if color
// validate the color
if(!value.match(colorPattern)) continue;
if(value.match(/#[a-z0-9]+/ig)){
// if hex then convert to rgb
var rgb = $hd(value).hex2rgb(),
value = !rgb?null:rgb;
if(!value) continue;
}
// verifying cssStart's value
startValue = !startValue.match(colorPattern)?this.ele.getcss(name):startValue;
if(!startValue.match(colorPattern)) continue;
if(startValue.match(/#[a-z0-9]+/ig)){
// if hex then convert to rgb
var rgb = $hd(startValue).hex2rgb(),
startValue = rgb==null?null:rgb;
}
// if browser doesn't support rgba then convert the value to rgb
value = !$hd.supports.rgba && value.match(/rgba/i)?value.replace(/(.*)a\s?(\((\d{1,3},)(\d{1,3},)(\d{1,3})).*/i,'$1$2)'):value;
startValue = !$hd.supports.rgba && startValue.match(/rgba/i)?startValue.replace(/(.*)a\s?(\((\d{1,3},)(\d{1,3},)(\d{1,3})).*/i,'$1$2)'):startValue;
// compare and convert the value of both to object
var colora = value.match(/[0-9]{1,3}/g),
colorb = startValue.match(/[0-9]{1,3}/g);
if(colora.length > colorb.length){
colorb.push(this.ele.getcss('opacity'))
}else if(colorb.length>colora.length){
colora.push(colorb[colorb.length-1])
}
_cssEnd.push({
type:'color',
name:name,
value:{
r:parseInt(colora[0]),
g:parseInt(colora[1]),
b:parseInt(colora[2]),
a:colora[3]?parseFloat(colora[3]):null
}
});
_cssStart.push({
type:'color',
name:name,
value:{
r:parseInt(colorb[0]),
g:parseInt(colorb[1]),
b:parseInt(colorb[2]),
a:colorb[3]?parseFloat(colorb[3]):null
}
});
}else{
value = parseFloat(value),
startValue = parseFloat((isNaN(parseFloat(startValue))?parseFloat(this.ele.getcss(name)):startValue));
if(isNaN(value)) continue;
if(isNaN(startValue)) startValue = 0;
_cssEnd.push({
type:'unit',
name:name,
value:parseFloat(value)
});
_cssStart.push({
type:'unit',
name:name,
value:parseFloat(startValue)
});
}
}
};
verify.apply(this,[cssStart,cssEnd]);
// clearing the arguments
cssStart = complete = cssEnd = duration = tangent = loop = ele = verify = null;
if($hd(_cssEnd).isEmpty()) throw new Error('MotionClass::invalid css rules');// raise error if cssEnd is empty
var _pauseTime = 0;
this.play = function(){
if(this.isPlaying) return;
if(!this.ele.isExists() || !this.ele.visible()) {
this.stop();
return;
}
this.isPlaying = true;
_paused = false;
if( $hd(_cssEnd).inspectData('left',true,true).length||
$hd(_cssEnd).inspectData('top',true, true).length)
this.ele.css('position:absolute');
var st = new Date() - _pauseTime;
_tm = window.setInterval(function(){
if(!this.ele.isExists() || !this.ele.visible()) {
this.stop();
return;
}
var pg, delta,
timePassed = new Date() - st;
pg = timePassed / (this.duration*1000);
if (pg > 1) pg = 1;
if(_easing === 'easeout'){
delta = 1 - hd.classes.motionTangents[_tangent](1 - pg);
}else if(_easing==='easeinout'){
if (pg <= 0.5) {
// the first half of animation will easing in
delta= hd.classes.motionTangents[_tangent](2 * pg) / 2
} else {
// the rest of animation will easing out
delta= (2 - hd.classes.motionTangents[_tangent](2 * (1 - pg))) / 2
}
}else{
delta = hd.classes.motionTangents[_tangent](pg);
}
// the movement
_step.call(this,delta);
if(_paused){
window.clearInterval(_tm);
_tm=null;
_pauseTime = timePassed;
this.isPlaying = false;
return;
}
if (pg == 1) {
_pauseTime =0;
if(_loop>=this.loop){
this.complete = true;
this.stop();
if(_complete)_complete.call(null,this);
}else{
_loop++;
st = new Date(),
timePassed = new Date() - st,
pg = 0;
}
}
}.bind(this),15);
};
_step = function(delta){
var styles = '';
for(var i=0;i<_cssEnd.length;i++){
var name = _cssEnd[i].name,
svalue =_cssStart[i].value,
value = _cssEnd[i].value;
if(_cssEnd[i].type == 'color'){
styles += name+':'+(value.a !=null?'rgba(':'rgb(')
+ Math.max(Math.min(parseInt((delta * (value.r-svalue.r)) + svalue.r, 10), 255), 0) + ','
+ Math.max(Math.min(parseInt((delta * (value.g-svalue.g)) + svalue.g, 10), 255), 0) + ','
+ Math.max(Math.min(parseInt((delta * (value.b-svalue.b)) + svalue.b, 10), 255), 0)
+ (value.a ==null?'':',' + $hd(parseFloat((value.a-svalue.a)*delta+svalue.a)).round(1)) +') !important;';
}else{
styles += name+':'+ $hd(parseFloat((value-svalue)*delta+svalue)).round(2) + (name.match(/opacity/i)?'':'px')+ '!important;';
}
this.ele.css(styles);
}
};
this.stop = function(){
this.isPlaying = false;
window.clearInterval(_tm);
_tm=null;
_loop = 0;
};
this.pause = function(){
_paused = true;
};
}
this how the problems came up;
var color = 'rgba('+($(1).randomize(0,255)+',')+
($(1).randomize(0,255)+',')+
($(1).randomize(0,255)+',')+
'1)';
var bcolor = 'rgb('+($(1).randomize(0,255)+',')+
($(1).randomize(0,255)+',')+
($(1).randomize(0,255)+',')+
')';
var motion = new hd.classes.motion(box,'',('height:'+($(1).randomize(10,50))+
'px;border-color:'+bcolor+
';background-color:'+color+
';left :'+((e.x || e.clientX)-(box.rectangle().width/2))+
';top : '+((e.y || e.clientY)-(box.rectangle().height/2))+
';border-top-width:'+($(1).randomize(0,50))),
2,'circle','easeinout',1, function(e){
status.html('Idle');
});
motion.play();
while variable motion has been referenced with an motion class (animation), how possible to stop the first motion's timer if it being replaced with new motion class(animation)
Really easy! clearInterval(tm). If you call them different names, you will be able to differentiate between them.
The javascript I am using:
javascript: c = '{unit}, ({coords}) {player} |{distance}| {return}';
p = ['Scout', 'LC', 'HC', 'Axe', 'Sword', 'Ram', '***Noble***'];
function V() {
return 1;
}
window.onerror = V;
function Z() {
d = (window.frames.length > 0) ? window.main.document : document;
aid = d.getElementById('editInput').parentNode.innerHTML.match(/id\=(\d+)/)[1];
function J(e) {
vv = e.match(/\d+\|\d+/g);
return (vv ? vv[vv.length - 1].match(/((\d+)\|(\d+))/) : null);
}
function K(e) {
f = parseInt(e, 10);
return (f > 9 ? f : '0' + f);
}
function L(g, e) {
return g.getElementsByTagName(e);
}
function N(g) {
return g.innerHTML;
}
function M(g) {
return N(L(g, 'a')[0]);
}
function O() {
return k.insertRow(E++);
}
function W(f) {
return B.insertCell(f);
}
function P(g, e) {
g.innerHTML = e;
return g;
}
function X(e) {
C = B.appendChild(d.createElement('th'));
return P(C, e);
}
function Y(f) {
return K(f / U) + ':' + K(f % (U) / T) + ':' + K(f % T);
}
U = 3600;
T = 60;
R = 'table';
S = 'width';
s = L(document, R);
for (j = 0; j < s.length; j++) {
s[j].removeAttribute(S);
if (s[j].className == 'main') {
s = L(L(s[j], 'tbody')[0], R);
break;
}
}
D = 0;
for (j = 0; j < s.length; j++) {
s[j].removeAttribute(S);
if (s[j].className = 'vis') {
k = s[j];
if (t = k.rows) {
D = t.length;
break;
}
}
}
for (E = 0; E < D; E++) {
l = t[E];
m = (u = l.cells) ? u.length : 0;
if (m) {
u[m - 1].colSpan = 5 - m;
if (N(u[0]) == 'Arrival:') {
Q = new Date(N(u[1]).replace(/<.*/i, ''));
} else {
if (N(u[0]) == 'Arrival in:') {
v = N(u[1]).match(/\d+/ig);
}
}
if (E == 1) {
G = M(u[2]);
}
if (E == 2) {
w = J(M(u[1]));
}
if (E == 4) {
x = J(M(u[1]));
}
}
}
y = v[0] * U + v[1] * T + v[2] * 1;
n = w[2] - x[2];
o = w[3] - x[3];
F = Math.sqrt(n * n + o * o);
H = F.toFixed(2);
E = D - 2;
s = L(k, 'input');
i = s[1];
h = s[0];
h.size = T;
B = O();
P(W(0), 'Distance:').colSpan = 2;
P(W(1), H + ' Fields').colSpan = 2;
B = O();
X('Unit');
X('Sent');
X('Duration');
X('Name to');
c = c.replace(/\{coords\}/i, w[1]).replace(/\{distance\}/i, H).replace(/\{player\}/i, G);
for (j in p) {
z = Math.round([9.00000000, 10.00000000, 11.00000000, 18.0000000015, 22.00000000, 30.00000000, 35.0000000][j] * T * F);
A = z - y;
if (A > 0) {
I = Y(z);
B = O();
P(W(0), p[j]);
P(W(1), A < T && 'just now' || A < U && Math.floor(A / T) + ' mins ago' || Y(A) + ' ago');
P(W(2), I);
C = W(3);
q = C.appendChild(i.cloneNode(1));
r = C.appendChild(h.cloneNode(1));
r.id = 'I' + j;
r.value = c.replace(/\{duration\}/i, I).replace(/\{sent\}/i, new Date(Q.valueOf() - z * 1000).toLocaleString().replace(/.\d{4}/i, '').replace(/(\w{3})\w*/i, '$1')).replace(/\{return\}/i, new Date(Q.valueOf() + z * 1000).toString().replace(/\w+\s*/i, '').replace(/(\d*:\d*:\d*)(.*)/i, '$1')).replace(/\{unit\}/i, p[j]).replace(/\{attack_id\}/i, aid);
q.onmousedown = new Function('h.value=d.getElementById(\'I' + j + '\').value;');
}
}
}
Z();
The error I receive:
Uncaught TypeError: Cannot read property 'parentNode' of null
A URL looks like this:
game.php?village=2100&id=4348754&type=other&screen=info_command
There are two possibilities:
editInput is a typo, and the actual id of that element is different (ids are case-sensitive).
You are executing this code while the DOM is not ready. To prevent this, execute the code just before the </body> closing tag, or wrap it in an event handler for the load event of window or the DOMContentLoaded event of document.
EDITED How to wrap your code:
window.onload = function() {
//your code here
};
In my case it was a conflict between slider and form validator as they were located on different pages but javascript file would of target both of them simultaneously, so all pages that had no slider would come up with "Cannot read property 'parentNode' of null" error, so I have added to the slider If statement:
if(document.getElementById("mainImage")){
var myImage = document.getElementById("mainImage");
var linkElement = myImage.parentNode;
that solved my problem, try it
I was trying to remove child element from parent:
constructor(private renderer: Renderer2) { }
removeChildEl() {
this.renderer.removeChild(parent, child);
}
but for some reason parent-element does not exist so I need to check via if condition:
removeChildEl() {
if(parent)
this.renderer.removeChild(parent, child);
}
so if the parent exists then remove the child otherwise do nothing.
I am have been trying to teach myself ASP.NET and Javascript for a project and have been stuck on one problem for literally dozens of hours now.
I found a really nice javascript drag-and-drop list online, copied the source offered and split the css into a .css file, the javascript into a .js file and the HTML and reference into my asp.net page. It worked perfectly. Great!
Next, I replaced the javascript list with a static HTML list populated with the same data, wrapped it in an UpdatePanel and set up an "edit order" button to swap the static list's HTML for the javascript list's HTML when the button is pressed.
No Dice!
First, the initial runtime would throw up javascript errors explaining that certain objects could not be found. For example:
Microsoft JScript runtime error: Unable to get value of the property 'getElementsByTagName': object is null or undefined
Understood, because the elements aren't actually there yet. So I removed my reference to the .js in the main header and tried to register the .js file when the update panel is changed instead.
This is my problem.
Most explanations online have focused onRegisterClientScriptBlock, or RegisterStartupScript, or RegisterClientScriptInclude, or myLiteral and I can't get any of them to work. I also find that lots of online explanations are for running a single javascript function, whereas the script I am trying to get working has 700 lines-worth of them! Do I have to reference them all individually?
Sorry for the, no doubt, newbish question. I waited to ask until I had shouted at the screen with sufficient vitriol to warrant begging for help!
Thanks and regards.
EDIT: CODE
As Requested, this is the code:
VB.net (this is in a sub called by the button press. This is when I need to register my script)
Dim script As String = ""
Dim Labelb As Label = CType(FindControl("Labelb"), Label)
Dim con As SqlConnection
Dim cmd As SqlCommand
con = New SqlConnection("[connection string here]")
con.Open()
Dim lrd As SqlDataReader
cmd = New SqlCommand("[command string here]", con)
lrd = cmd.ExecuteReader
Dim item = ""
While lrd.Read()
item = item & "<li style=""position: relative;"">" & lrd(1) & "</li>"
End While
lrd.Close()
item = "<table id=""phonetics""><tbody><tr><td><ul id=""phonetic3"" class=""boxy"">" & item & "</ul></td></tr></tbody></table><br/>"
Labelb.Text = item
This is the HTML update panel in the asp.net master page:
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePartialRendering="true"/>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Label ID="Labelb" runat="server" Text="" />
</ContentTemplate>
</asp:UpdatePanel>
and finally, this is the .js file that I need to register
var ToolMan = {
events : function() {
if (!ToolMan._eventsFactory) throw "ToolMan Events module isn't loaded";
return ToolMan._eventsFactory
},
css : function() {
if (!ToolMan._cssFactory) throw "ToolMan CSS module isn't loaded";
return ToolMan._cssFactory
},
coordinates : function() {
if (!ToolMan._coordinatesFactory) throw "ToolMan Coordinates module isn't loaded";
return ToolMan._coordinatesFactory
},
drag : function() {
if (!ToolMan._dragFactory) throw "ToolMan Drag module isn't loaded";
return ToolMan._dragFactory
},
dragsort : function() {
if (!ToolMan._dragsortFactory) throw "ToolMan DragSort module isn't loaded";
return ToolMan._dragsortFactory
},
helpers : function() {
return ToolMan._helpers
},
cookies : function() {
if (!ToolMan._cookieOven) throw "ToolMan Cookie module isn't loaded";
return ToolMan._cookieOven
},
junkdrawer : function() {
return ToolMan._junkdrawer
}
}
ToolMan._helpers = {
map : function(array, func) {
for (var i = 0, n = array.length; i < n; i++) func(array[i])
},
nextItem : function(item, nodeName) {
if (item == null) return
var next = item.nextSibling
while (next != null) {
if (next.nodeName == nodeName) return next
next = next.nextSibling
}
return null
},
previousItem : function(item, nodeName) {
var previous = item.previousSibling
while (previous != null) {
if (previous.nodeName == nodeName) return previous
previous = previous.previousSibling
}
return null
},
moveBefore : function(item1, item2) {
var parent = item1.parentNode
parent.removeChild(item1)
parent.insertBefore(item1, item2)
},
moveAfter : function(item1, item2) {
var parent = item1.parentNode
parent.removeChild(item1)
parent.insertBefore(item1, item2 ? item2.nextSibling : null)
}
}
/**
* scripts without a proper home
*
* stuff here is subject to change unapologetically and without warning
*/
ToolMan._junkdrawer = {
serializeList : function(list) {
var items = list.getElementsByTagName("li")
var array = new Array()
for (var i = 0, n = items.length; i < n; i++) {
var item = items[i]
array.push(ToolMan.junkdrawer()._identifier(item))
}
return array.join('|')
},
inspectListOrder : function(id) {
alert(ToolMan.junkdrawer().serializeList(document.getElementById(id)))
},
restoreListOrder : function(listID) {
var list = document.getElementById(listID)
if (list == null) return
var cookie = ToolMan.cookies().get("list-" + listID)
if (!cookie) return;
var IDs = cookie.split('|')
var items = ToolMan.junkdrawer()._itemsByID(list)
for (var i = 0, n = IDs.length; i < n; i++) {
var itemID = IDs[i]
if (itemID in items) {
var item = items[itemID]
list.removeChild(item)
list.insertBefore(item, null)
}
}
},
_identifier : function(item) {
var trim = ToolMan.junkdrawer().trim
var identifier
identifier = trim(item.getAttribute("id"))
if (identifier != null && identifier.length > 0) return identifier;
identifier = trim(item.getAttribute("itemID"))
if (identifier != null && identifier.length > 0) return identifier;
// FIXME: strip out special chars or make this an MD5 hash or something
return trim(item.innerHTML)
},
_itemsByID : function(list) {
var array = new Array()
var items = list.getElementsByTagName('li')
for (var i = 0, n = items.length; i < n; i++) {
var item = items[i]
array[ToolMan.junkdrawer()._identifier(item)] = item
}
return array
},
trim : function(text) {
if (text == null) return null
return text.replace(/^(\s+)?(.*\S)(\s+)?$/, '$2')
}
}
ToolMan._eventsFactory = {
fix : function(event) {
if (!event) event = window.event
if (event.target) {
if (event.target.nodeType == 3) event.target = event.target.parentNode
} else if (event.srcElement) {
event.target = event.srcElement
}
return event
},
register : function(element, type, func) {
if (element.addEventListener) {
element.addEventListener(type, func, false)
} else if (element.attachEvent) {
if (!element._listeners) element._listeners = new Array()
if (!element._listeners[type]) element._listeners[type] = new Array()
var workaroundFunc = function() {
func.apply(element, new Array())
}
element._listeners[type][func] = workaroundFunc
element.attachEvent('on' + type, workaroundFunc)
}
},
unregister : function(element, type, func) {
if (element.removeEventListener) {
element.removeEventListener(type, func, false)
} else if (element.detachEvent) {
if (element._listeners
&& element._listeners[type]
&& element._listeners[type][func]) {
element.detachEvent('on' + type,
element._listeners[type][func])
}
}
}
}
ToolMan._cssFactory = {
readStyle : function(element, property) {
if (element.style[property]) {
return element.style[property]
} else if (element.currentStyle) {
return element.currentStyle[property]
} else if (document.defaultView && document.defaultView.getComputedStyle) {
var style = document.defaultView.getComputedStyle(element, null)
return style.getPropertyValue(property)
} else {
return null
}
}
}
/* FIXME: assumes position styles are specified in 'px' */
ToolMan._coordinatesFactory = {
create : function(x, y) {
// FIXME: Safari won't parse 'throw' and aborts trying to do anything with this file
//if (isNaN(x) || isNaN(y)) throw "invalid x,y: " + x + "," + y
return new _ToolManCoordinate(this, x, y)
},
origin : function() {
return this.create(0, 0)
},
/*
* FIXME: Safari 1.2, returns (0,0) on absolutely positioned elements
*/
topLeftPosition : function(element) {
var left = parseInt(ToolMan.css().readStyle(element, "left"))
var left = isNaN(left) ? 0 : left
var top = parseInt(ToolMan.css().readStyle(element, "top"))
var top = isNaN(top) ? 0 : top
return this.create(left, top)
},
bottomRightPosition : function(element) {
return this.topLeftPosition(element).plus(this._size(element))
},
topLeftOffset : function(element) {
var offset = this._offset(element)
var parent = element.offsetParent
while (parent) {
offset = offset.plus(this._offset(parent))
parent = parent.offsetParent
}
return offset
},
bottomRightOffset : function(element) {
return this.topLeftOffset(element).plus(
this.create(element.offsetWidth, element.offsetHeight))
},
scrollOffset : function() {
if (window.pageXOffset) {
return this.create(window.pageXOffset, window.pageYOffset)
} else if (document.documentElement) {
return this.create(
document.body.scrollLeft + document.documentElement.scrollLeft,
document.body.scrollTop + document.documentElement.scrollTop)
} else if (document.body.scrollLeft >= 0) {
return this.create(document.body.scrollLeft, document.body.scrollTop)
} else {
return this.create(0, 0)
}
},
clientSize : function() {
if (window.innerHeight >= 0) {
return this.create(window.innerWidth, window.innerHeight)
} else if (document.documentElement) {
return this.create(document.documentElement.clientWidth,
document.documentElement.clientHeight)
} else if (document.body.clientHeight >= 0) {
return this.create(document.body.clientWidth,
document.body.clientHeight)
} else {
return this.create(0, 0)
}
},
/**
* mouse coordinate relative to the window (technically the
* browser client area) i.e. the part showing your page
*
* NOTE: in Safari the coordinate is relative to the document
*/
mousePosition : function(event) {
event = ToolMan.events().fix(event)
return this.create(event.clientX, event.clientY)
},
/**
* mouse coordinate relative to the document
*/
mouseOffset : function(event) {
event = ToolMan.events().fix(event)
if (event.pageX >= 0 || event.pageX < 0) {
return this.create(event.pageX, event.pageY)
} else if (event.clientX >= 0 || event.clientX < 0) {
return this.mousePosition(event).plus(this.scrollOffset())
}
},
_size : function(element) {
/* TODO: move to a Dimension class */
return this.create(element.offsetWidth, element.offsetHeight)
},
_offset : function(element) {
return this.create(element.offsetLeft, element.offsetTop)
}
}
function _ToolManCoordinate(factory, x, y) {
this.factory = factory
this.x = isNaN(x) ? 0 : x
this.y = isNaN(y) ? 0 : y
}
_ToolManCoordinate.prototype = {
toString : function() {
return "(" + this.x + "," + this.y + ")"
},
plus : function(that) {
return this.factory.create(this.x + that.x, this.y + that.y)
},
minus : function(that) {
return this.factory.create(this.x - that.x, this.y - that.y)
},
min : function(that) {
return this.factory.create(
Math.min(this.x , that.x), Math.min(this.y , that.y))
},
max : function(that) {
return this.factory.create(
Math.max(this.x , that.x), Math.max(this.y , that.y))
},
constrainTo : function (one, two) {
var min = one.min(two)
var max = one.max(two)
return this.max(min).min(max)
},
distance : function (that) {
return Math.sqrt(Math.pow(this.x - that.x, 2) + Math.pow(this.y - that.y, 2))
},
reposition : function(element) {
element.style["top"] = this.y + "px"
element.style["left"] = this.x + "px"
}
}
ToolMan._dragFactory = {
createSimpleGroup : function(element, handle) {
handle = handle ? handle : element
var group = this.createGroup(element)
group.setHandle(handle)
group.transparentDrag()
group.onTopWhileDragging()
return group
},
createGroup : function(element) {
var group = new _ToolManDragGroup(this, element)
var position = ToolMan.css().readStyle(element, 'position')
if (position == 'static') {
element.style["position"] = 'relative'
} else if (position == 'absolute') {
/* for Safari 1.2 */
ToolMan.coordinates().topLeftOffset(element).reposition(element)
}
// TODO: only if ToolMan.isDebugging()
group.register('draginit', this._showDragEventStatus)
group.register('dragmove', this._showDragEventStatus)
group.register('dragend', this._showDragEventStatus)
return group
},
_showDragEventStatus : function(dragEvent) {
window.status = dragEvent.toString()
},
constraints : function() {
return this._constraintFactory
},
_createEvent : function(type, event, group) {
return new _ToolManDragEvent(type, event, group)
}
}
function _ToolManDragGroup(factory, element) {
this.factory = factory
this.element = element
this._handle = null
this._thresholdDistance = 0
this._transforms = new Array()
// TODO: refactor into a helper object, move into events.js
this._listeners = new Array()
this._listeners['draginit'] = new Array()
this._listeners['dragstart'] = new Array()
this._listeners['dragmove'] = new Array()
this._listeners['dragend'] = new Array()
}
_ToolManDragGroup.prototype = {
/*
* TODO:
* - unregister(type, func)
* - move custom event listener stuff into Event library
* - keyboard nudging of "selected" group
*/
setHandle : function(handle) {
var events = ToolMan.events()
handle.toolManDragGroup = this
events.register(handle, 'mousedown', this._dragInit)
handle.onmousedown = function() { return false }
if (this.element != handle)
events.unregister(this.element, 'mousedown', this._dragInit)
},
register : function(type, func) {
this._listeners[type].push(func)
},
addTransform : function(transformFunc) {
this._transforms.push(transformFunc)
},
verticalOnly : function() {
this.addTransform(this.factory.constraints().vertical())
},
horizontalOnly : function() {
this.addTransform(this.factory.constraints().horizontal())
},
setThreshold : function(thresholdDistance) {
this._thresholdDistance = thresholdDistance
},
transparentDrag : function(opacity) {
var opacity = typeof(opacity) != "undefined" ? opacity : 0.75;
var originalOpacity = ToolMan.css().readStyle(this.element, "opacity")
this.register('dragstart', function(dragEvent) {
var element = dragEvent.group.element
element.style.opacity = opacity
element.style.filter = 'alpha(opacity=' + (opacity * 100) + ')'
})
this.register('dragend', function(dragEvent) {
var element = dragEvent.group.element
element.style.opacity = originalOpacity
element.style.filter = 'alpha(opacity=100)'
})
},
onTopWhileDragging : function(zIndex) {
var zIndex = typeof(zIndex) != "undefined" ? zIndex : 100000;
var originalZIndex = ToolMan.css().readStyle(this.element, "z-index")
this.register('dragstart', function(dragEvent) {
dragEvent.group.element.style.zIndex = zIndex
})
this.register('dragend', function(dragEvent) {
dragEvent.group.element.style.zIndex = originalZIndex
})
},
_dragInit : function(event) {
event = ToolMan.events().fix(event)
var group = document.toolManDragGroup = this.toolManDragGroup
var dragEvent = group.factory._createEvent('draginit', event, group)
group._isThresholdExceeded = false
group._initialMouseOffset = dragEvent.mouseOffset
group._grabOffset = dragEvent.mouseOffset.minus(dragEvent.topLeftOffset)
ToolMan.events().register(document, 'mousemove', group._drag)
document.onmousemove = function() { return false }
ToolMan.events().register(document, 'mouseup', group._dragEnd)
group._notifyListeners(dragEvent)
},
_drag : function(event) {
event = ToolMan.events().fix(event)
var coordinates = ToolMan.coordinates()
var group = this.toolManDragGroup
if (!group) return
var dragEvent = group.factory._createEvent('dragmove', event, group)
var newTopLeftOffset = dragEvent.mouseOffset.minus(group._grabOffset)
// TODO: replace with DragThreshold object
if (!group._isThresholdExceeded) {
var distance =
dragEvent.mouseOffset.distance(group._initialMouseOffset)
if (distance < group._thresholdDistance) return
group._isThresholdExceeded = true
group._notifyListeners(
group.factory._createEvent('dragstart', event, group))
}
for (i in group._transforms) {
var transform = group._transforms[i]
newTopLeftOffset = transform(newTopLeftOffset, dragEvent)
}
var dragDelta = newTopLeftOffset.minus(dragEvent.topLeftOffset)
var newTopLeftPosition = dragEvent.topLeftPosition.plus(dragDelta)
newTopLeftPosition.reposition(group.element)
dragEvent.transformedMouseOffset = newTopLeftOffset.plus(group._grabOffset)
group._notifyListeners(dragEvent)
var errorDelta = newTopLeftOffset.minus(coordinates.topLeftOffset(group.element))
if (errorDelta.x != 0 || errorDelta.y != 0) {
coordinates.topLeftPosition(group.element).plus(errorDelta).reposition(group.element)
}
},
_dragEnd : function(event) {
event = ToolMan.events().fix(event)
var group = this.toolManDragGroup
var dragEvent = group.factory._createEvent('dragend', event, group)
group._notifyListeners(dragEvent)
this.toolManDragGroup = null
ToolMan.events().unregister(document, 'mousemove', group._drag)
document.onmousemove = null
ToolMan.events().unregister(document, 'mouseup', group._dragEnd)
},
_notifyListeners : function(dragEvent) {
var listeners = this._listeners[dragEvent.type]
for (i in listeners) {
listeners[i](dragEvent)
}
}
}
function _ToolManDragEvent(type, event, group) {
this.type = type
this.group = group
this.mousePosition = ToolMan.coordinates().mousePosition(event)
this.mouseOffset = ToolMan.coordinates().mouseOffset(event)
this.transformedMouseOffset = this.mouseOffset
this.topLeftPosition = ToolMan.coordinates().topLeftPosition(group.element)
this.topLeftOffset = ToolMan.coordinates().topLeftOffset(group.element)
}
_ToolManDragEvent.prototype = {
toString : function() {
return "mouse: " + this.mousePosition + this.mouseOffset + " " +
"xmouse: " + this.transformedMouseOffset + " " +
"left,top: " + this.topLeftPosition + this.topLeftOffset
}
}
ToolMan._dragFactory._constraintFactory = {
vertical : function() {
return function(coordinate, dragEvent) {
var x = dragEvent.topLeftOffset.x
return coordinate.x != x
? coordinate.factory.create(x, coordinate.y)
: coordinate
}
},
horizontal : function() {
return function(coordinate, dragEvent) {
var y = dragEvent.topLeftOffset.y
return coordinate.y != y
? coordinate.factory.create(coordinate.x, y)
: coordinate
}
}
}
ToolMan._dragsortFactory = {
makeSortable : function(item) {
var group = ToolMan.drag().createSimpleGroup(item)
group.register('dragstart', this._onDragStart)
group.register('dragmove', this._onDragMove)
group.register('dragend', this._onDragEnd)
return group
},
/**
* Iterates over a list's items, making them sortable, applying
* optional functions to each item.
*
* example: makeListSortable(myList, myFunc1, myFunc2, ... , myFuncN)
*/
makeListSortable : function(list) {
var helpers = ToolMan.helpers()
var coordinates = ToolMan.coordinates()
var items = list.getElementsByTagName("li")
helpers.map(items, function(item) {
var dragGroup = dragsort.makeSortable(item)
dragGroup.setThreshold(4)
var min, max
dragGroup.addTransform(function(coordinate, dragEvent) {
return coordinate.constrainTo(min, max)
})
dragGroup.register('dragstart', function() {
var items = list.getElementsByTagName("li")
min = max = coordinates.topLeftOffset(items[0])
for (var i = 1, n = items.length; i < n; i++) {
var offset = coordinates.topLeftOffset(items[i])
min = min.min(offset)
max = max.max(offset)
}
})
})
for (var i = 1, n = arguments.length; i < n; i++)
helpers.map(items, arguments[i])
},
_onDragStart : function(dragEvent) {
},
_onDragMove : function(dragEvent) {
var helpers = ToolMan.helpers()
var coordinates = ToolMan.coordinates()
var item = dragEvent.group.element
var xmouse = dragEvent.transformedMouseOffset
var moveTo = null
var previous = helpers.previousItem(item, item.nodeName)
while (previous != null) {
var bottomRight = coordinates.bottomRightOffset(previous)
if (xmouse.y <= bottomRight.y && xmouse.x <= bottomRight.x) {
moveTo = previous
}
previous = helpers.previousItem(previous, item.nodeName)
}
if (moveTo != null) {
helpers.moveBefore(item, moveTo)
return
}
var next = helpers.nextItem(item, item.nodeName)
while (next != null) {
var topLeft = coordinates.topLeftOffset(next)
if (topLeft.y <= xmouse.y && topLeft.x <= xmouse.x) {
moveTo = next
}
next = helpers.nextItem(next, item.nodeName)
}
if (moveTo != null) {
helpers.moveBefore(item, helpers.nextItem(moveTo, item.nodeName))
return
}
},
_onDragEnd : function(dragEvent) {
ToolMan.coordinates().create(0, 0).reposition(dragEvent.group.element)
}
}
ToolMan._cookieOven = {
set : function(name, value, expirationInDays) {
if (expirationInDays) {
var date = new Date()
date.setTime(date.getTime() + (expirationInDays * 24 * 60 * 60 * 1000))
var expires = "; expires=" + date.toGMTString()
} else {
var expires = ""
}
document.cookie = name + "=" + value + expires + "; path=/"
},
get : function(name) {
var namePattern = name + "="
var cookies = document.cookie.split(';')
for(var i = 0, n = cookies.length; i < n; i++) {
var c = cookies[i]
while (c.charAt(0) == ' ') c = c.substring(1, c.length)
if (c.indexOf(namePattern) == 0)
return c.substring(namePattern.length, c.length)
}
return null
},
eraseCookie : function(name) {
createCookie(name, "", -1)
}
}
var dragsort = ToolMan.dragsort()
var junkdrawer = ToolMan.junkdrawer()
window.onload = function() {
junkdrawer.restoreListOrder("phonetic3")
//junkdrawer.restoreListOrder("twolists1")
//junkdrawer.restoreListOrder("twolists2")
dragsort.makeListSortable(document.getElementById("phonetic3"),
verticalOnly, saveOrder)
/*
dragsort.makeListSortable(document.getElementById("twolists1"),
saveOrder)
dragsort.makeListSortable(document.getElementById("twolists2"),
saveOrder)
*/
}
function verticalOnly(item) {
item.toolManDragGroup.verticalOnly()
}
function speak(id, what) {
var element = document.getElementById(id);
element.innerHTML = 'Clicked ' + what;
}
function saveOrder(item) {
var group = item.toolManDragGroup
var list = group.element.parentNode
var id = list.getAttribute("id")
if (id == null) return
group.register('dragend', function() {
ToolMan.cookies().set("list-" + id,
junkdrawer.serializeList(list), 365)
})
}
//-->
Thanks so much for your support!
Regards,
If you are seeing "value of the property 'getElementsByTagName' object is null or undefined" there is one of two possible issues:
1) your script file is not properly loaded.
2) You are calling 'getElementsByTagName' inappropriately.
Since you haven't posted any sample code, it would be very difficult for anybody to provide a definitive answer to your question.
It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.
Closed 12 years ago.
I've been trying to figure it out for hours and i didn't success, This Counter from Apple 1 billion downloads prize. doesn't use flash at all, only javascript and 0-9 images, which makes it really cool. Now after stackoverflow successed to extract google's pacman, can we do that?
P.S I can't even know if this is using prototype or scriptaculous since they're both included.
Here it is: http://images.apple.com/global/scripts/downloadcounter.js
StepTimingFunction = {
timingFunctionForStepCount: function (a) {
return function (b) {
return ((b * (a - 1)) >> 0) / ((a - 1))
}
}
};
DownloadCounter = Class.create();
Object.extend(DownloadCounter.prototype, {
initialize: function (a) {
this._url = a;
this.loadData();
this._isCounting = true
},
setIsCounting: function (a) {
this._isCounting = a
},
stop: function () {
if (this._isCounting) {
if (this._drawTimeout) {
window.clearTimeout(this._drawTimeout)
}
this.setIsCounting(false);
if (this._delegate && typeof this._delegate.counterDidStop === "function") {
this._delegate.counterDidStop(this)
}
}
},
start: function () {
if (!this._isCounting) {
this.loadData();
this.setIsCounting(true);
if (this._delegate && typeof this._delegate.counterDidStart === "function") {
this._delegate.counterDidStart(this)
}
}
},
isCounting: function () {
return this._isCounting
},
_delegate: null,
setDelegate: function (a) {
this._delegate = a
},
delegate: function () {
return this._delegate
},
loadData: function () {
if (this._nextUpdateTimeout) {
window.clearTimeout(this._nextUpdateTimeout);
this._nextUpdateTimeout = null
}
var a = document.location.href.toString();
a = a.replace(/.apple.com\/.*$/, ".apple.com");
new Ajax.Request((a + this._url + "?r=" + Math.random()), {
method: "get",
onSuccess: this.dataRequestDidFinishLoading.bind(this)
})
},
dataRequestDidFinishLoading: function (o) {
var k = o.responseText.split("|"),
n, d, j, g, l, h, b, f, e, m, a, i, c;
localServerBasedReferenceTime = Date.parse(o.getResponseHeader("Date"));
if (k.length === 3) {
n = k[0].split(" ");
d = n[1];
date = n[0].split("-");
this.setRate(parseInt(k[2]) / 3600000);
l = date[0];
g = date[1];
j = date[2];
a = Date.parse(g + " " + l + ", " + j + " " + d + " GMT-0700");
e = new Date(a + 3600000);
m = e.getTime() - a + 1000;
this._nextUpdateTimeout = setTimeout(this.loadData.bind(this), m);
if (typeof localServerBasedReferenceTime === "number") {
this._lastReferenceTime = localServerBasedReferenceTime
} else {
b = new Date();
this._lastReferenceTime = b.getTime()
}
f = this._lastReferenceTime - a;
i = Math.floor(parseInt(k[1]) + f * (this._rate));
this.setCurrentCount(i);
this.setNeedsDisplayIfNeeded()
}
},
setNeedsDisplayIfNeeded: function () {
if (!this._drawTimeout) {
this._drawTimeout = setTimeout(this.draw.bind(this), this._drawRefreshRate)
}
},
setElement: function (c) {
this._element = c;
var b = this._element.getElementsByClassName("digitGroupSeparator");
if (b.length > 0) {
var a = b[0];
this._element.removeChild(a);
this.setDigitGroupSeparatorTemplateElement(a)
}
this._element.empty();
this.createDigitElementsIfNeeded();
this.setNeedsDisplayIfNeeded()
},
setDigitGroupSeparatorTemplateElement: function (a) {
this._digitGroupSeparatorTemplateElement = a
},
_currentCount: 0,
setCurrentCount: function (a) {
if (a !== this._currentCount) {
this._currentCount = a;
this.createDigitElementsIfNeeded()
}
},
digitTemplateElement: function () {
if (!this._digitTemplateElement) {
this._digitTemplateElement = document.createElement("span");
$(this._digitTemplateElement).addClassName("digit");
var a = document.createElement("div"),
b = document.createElement("div"),
c = document.createElement("div");
$(a).addClassName("digitText");
$(b).addClassName("digitImage");
this._digitTemplateElement.appendChild(a);
this._digitTemplateElement.appendChild(b);
$(c).addClassName("digitImageElement");
b.appendChild(c.cloneNode(true));
b.appendChild(c)
}
return this._digitTemplateElement
},
createDigitElementsIfNeeded: function () {
if (this._element && (!this._digitElements || this._digitElements.length !== this._currentCount.toString().length)) {
this._element.empty();
this._createDigitElements()
}
},
_createDigitElements: function () {
if (!this._digitElements) {
this._digitElements = []
}
var e = 0,
b = (this._maxCount && this._currentCount >= this._maxCount) ? this._maxCount.toString().length : this._currentCount.toString().length,
c = document.createDocumentFragment(),
a, h = this.digitTemplateElement(),
g = this._digitGroupSeparatorTemplateElement,
d = (this._maxCount && this._currentCount >= this._maxCount) ? String(this._maxCount) : String(this._currentCount),
f;
if (!g) {
g = document.createElement("span");
$(g).addClassName("digitGroupSeparator")
}
for (e = 0 + this._digitElements.length; e < b; e++) {
a = h.cloneNode(true);
f = parseInt(d.charAt(b - (e + 1)));
a.lastChild.style.top = "-" + (f * (this._digitImageAnimationCount * this._digitImageHeight)) + "px";
this._digitElements[e] = a;
if (e > 0 && ((e) % 3 == 0)) {
c.insertBefore(g.cloneNode(true), c.firstChild)
}
c.insertBefore(a, c.firstChild)
}
this._element.insertBefore(c, this._element.firstChild)
},
currentCount: function () {
return this._currentCount
},
setRate: function (a) {
this._rate = a
},
rate: function () {
return this._rate
},
_drawRefreshRate: 50,
_digitImageHeight: 38,
setDigitImageHeight: function (a) {
this._digitImageHeight = a
},
_digitImageAnimationCount: 6,
setDigitImageAnimationCount: function (a) {
this._digitImageAnimationCount = a
},
_maxCount: false,
setMaxCount: function (a) {
this._maxCount = a
},
draw: function () {
window.clearTimeout(this._drawTimeout);
this._drawTimeout = null;
var h = this._drawRefreshRate,
e, j, k, c, a, l, o, b, n, d, m, p = this._digitImageHeight * this._digitImageAnimationCount,
g, f = this._digitElements,
q;
if (this._element) {
m = String(this._currentCount);
this._currentCount = this._currentCount + Math.floor(this._rate * h);
if (this._delegate && typeof this._delegate.counterDidReachValue === "function") {
this._delegate.counterDidReachValue(this, this._currentCount)
}
if (this._maxCount && this._currentCount >= this._maxCount) {
this._isCounting = false
}
if (!this._isCounting) {
return
}
e = (this._maxCount && this._currentCount >= this._maxCount) ? String(this._maxCount) : String(this._currentCount);
j = e.length;
k = j - 1;
for (c = k; c >= 0; c--) {
l = parseInt(e.charAt(c));
o = parseInt(m.charAt(c));
if (l !== o) {
if (!((k - c) < f.length)) {
this._createDigitElements()
}
a = f[k - c].lastChild;
if (a.___animating !== true) {
n = o * p;
if (l > o) {
b = l * p
} else {
b = (o + (10 - o) + l) * p
}
if (a.style.top !== (d = "-" + n + "px")) {
a.style.top = d
}
g = 1 + ((b - n) / this._digitImageHeight);
a.___animating = true;
q = new Effect.Move(a, {
x: 0,
y: (-1 * b),
duration: 0.4,
mode: "absolute",
transition: StepTimingFunction.timingFunctionForStepCount(g)
});
q.__element = a;
q.finish = function (i) {
if (window.removeEventListener) {
window.removeEventListener("unload", arguments.callee, false)
}
if (this.__element !== undefined) {
this.__element.___animating = false
}
};
if (window.addEventListener) {
window.addEventListener("unload", q.finish, false)
}
}
}
}
}
this._lastReferenceTime = (this._lastReferenceTime + h);
this.setNeedsDisplayIfNeeded()
}
});
Looks like it's a JS counter coupled with CSS.
The hearth of the whole script is this single image: http://images.apple.com/itunes/10-billion-app-countdown/images/filmstrip.png
Now everything should be obvious.
HTML placeholder for a single digit:
<div class="digit-placeholder"></div>
CSS that styles that placeholder:
.digit-placeholder {
/* Dimensions of a single "frame" */
width: 50px;
height: 75px;
background-image: url(...);
background-position: 0 0;
}
To display digit 7 you just have to move background (background-positon property) to the following coordinates: 0 -2800px (that's only an example). To display 8 move it to 0 -3400px.
To create an animation (change from 7 to 8) you just have to move background from -2800 to -3400 with a step of 60 in some period of time (let's say 0.5 second).
All you have to do is to clone that several times (10 times for one billion) and compute that period of time for each digit.
There's a file stored on the apple server which contains a count and a timestamp:
http://www.apple.com/autopush/us/itunes/includes/countdown.inc
That should give you a rough count.
Before I go to bed:
var number = '';
$('.digitImage').each(function(i) {
number += Math.abs($(this).position().top) / 618;
});
console.log(+number);
Now how long did that take? 3 minutes trying to figure out how do install a bookmarklet in chrome for injecting jQuery... 5 more minutes to get it working.