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/*========================================
This comparison script was written by
Tyrok1, and has been tested on FxIE 35.6.65,
IE 6, IE 7, IE 8, Fx 3.6.2, and
Cr 5.0.375.99, Epiphany 2.30.2,
MidoriFe 4.0.2280.2
========================================*/
function SectionLinkCreateLoadClosure(request)
var gadgetsAvailable = [
{
return function() {
if(request.readyState == 4)
{
//done loading
//initialize the "languages with link information" array
if(typeof localStorage == "undefined")
{
window.localStorage = new Array();
id: "LanguageComparison",
}
name: "Language comparison",
if(typeof localStorage.languageLinks = "undefined")
url: "http://rosettacode.org/mw/index.php" +
"?title=Rosetta_Code:Language_comparison_script" +
"&action=raw&ctype=text/javascript",
prefix: "Compare"
},
{
localStorage.languageLinks = new Array();
id: "UtilityButtonBar",
}
name: "Utility button bar",
url: "http://rosettacode.org/mw/index.php" +
//skip the toc
"?title=Rosetta_Code:Per-Code_Example_Buttonbar" +
var text = request.responseText;
"&action=raw&ctype=text/javascript",
var curPos = text.indexOf(" id=\"toctitle\"");
prefix: "ButtonBar"
var catLinksStart = text.indexOf("catlinks");
curPos = text.indexOf("</table>", curPos);
//start looking for anchor tags with name attributes
while((curPos = text.indexOf("a name=\"", curPos)) >= 0)
{
//isolate the name attribute
curPos += ("a name=\"").length;
var endPos = text.indexOf("\"", curPos);
var curAName = text.substring(curPos, endPos);
//find the next anchor with a name attribute so we know where the next section is
var nextA = text.indexOf("a name=\"", endPos);
//look for a language header
var headlinePos = text.indexOf("mw-headline", endPos);
if(nextA < headlinePos || text.substring(endPos, headlinePos).indexOf("h3") >= 0)
{
//no <h2> header
//not a full language section
continue;
}
//look for the end of the header and isolate the content of the header
var headlineEnd = text.indexOf("</h2>", headlinePos);
var headline = text.substring(headlinePos, headlineEnd);
//isolate the language category page it links to
var hrefStart = headline.indexOf(" href=\"") + (" href=\"").length;
var hrefEnd = headline.indexOf("\"", hrefStart);
var curHREF = headline.substring(hrefStart, hrefEnd);
//isolate the displayed text name of the language
var titleStart = headline.indexOf(" title=\"Category:") + (" title=\"Category:").length;
var titleEnd = headline.indexOf("\"", titleStart);
var curTitle = headline.substring(titleStart, titleEnd);
//check to make sure we have all the information we need about this language
if(curAName == "" || curHREF == "" || curTitle == "")
{
//something's missing
continue;
}
//add the language to our array for later use
localStorage.languageLinks[curTitle] = { aName: curAName, href: curHREF, title: curTitle };
}
//and if we've got a function to call when we're done, call it
if(request.callback)
{
request.callback();
}
];
function GadgetsAddHandler(el, handlerType, func)
{
//add an event handler in a more cross-browser way
if(el.addEventListener)
{
el.addEventListener(handlerType, func, false);
}
else if(el.attachEvent)
{
el.attachEvent("on" + handlerType, func);
}
else
{
eval("el.on" + handlerType + " = func;");
}
}
function GadgetsScriptLoad(g)
{
//see if we need to load it
//if we don't, there's not much point in loading it again
if(!document.getElementById("GadgetScript" + g))
{
var scriptEl = document.createElement("script");
scriptEl.setAttribute("id", "GadgetScript" + g);
scriptEl.setAttribute("type", "text/javascript");
scriptEl.setAttribute("src", gadgetsAvailable[g].url);
document.documentElement.appendChild(scriptEl);
}
}
function GadgetsScriptActivate(g)
{
//check to see if the script's finished loading
if(eval("typeof " + gadgetsAvailable[g].prefix + "Activate") == "undefined")
{
//not finished yet - try reactivating in another 0.5s
setTimeout(function() { GadgetsScriptActivate(g); }, 500);
}
else
{
//run the activation function
eval(gadgetsAvailable[g].prefix + "Activate();");
}
}
function GadgetsScriptDeactivate(g)
{
//check to see if the specified script has a deactivation function
if(eval("typeof " + gadgetsAvailable[g].prefix + "Deactivate") != "undefined")
{
//it does - run it
eval(gadgetsAvailable[g].prefix + "Deactivate();");
}
else
{
//pop up a warning to the user to let them know
//the plugin will be disabled when they reload
alert("This script will be disabled on next page load");
}
}
function GadgetsCreateCheckboxClosure(el)
{
//create an onclick handler for the script checkboxes
return function() {
//save the checkboxes to the cookie for next page load
GadgetsSaveCheckboxes();
//check to see if we need to activate or deactivate
if(el.checked)
{
//load and activate the script
GadgetsScriptLoad(el.value);
GadgetsScriptActivate(el.value);
}
else
{
//deactivate the script
GadgetsScriptDeactivate(el.value);
}
};
}
function GadgetsMouseOverSectionLinkFetchFrom(url, callback)
{
//fetch the given page and store all <a name>/language pairs on the page to the cookie for later
//show the scripts dropdown
var request = new XMLHttpRequest();
document.getElementById("pt-jsgadgets-list").style.display = "block";
request.onreadystatechange = SectionLinkCreateLoadClosure(request);
request.callback = callback;
request.open("GET", url, true);
request.send("");
}
function GadgetsMouseOutSectionLinkActivate()
{
//check to see if we're looking at a language page
//hide the scripts dropdown
var catLinksEl = document.getElementById("pt-jsgadgets-listcatlinks").style.display = "none";
var isLanguage = false;
}
if(catLinksEl)
function GadgetsSaveCheckboxes()
{
var checkedBoxes = "", checkboxEl = null;
//build a string representation of all of the checked boxes to save to the cookie
for(var c = 0; checkboxEl = document.getElementById("pt-jsgadgets-gadget" + c); ++c)
{
var aEls = catLinksEl.getElementsByTagName("a");
if(checkboxEl.checked)
for(var a = 0; a < aEls.length; ++a)
{
if(aEls[a].getAttribute("title") == "Category:Programming Languages")
if(checkedBoxes != "")
{
checkedBoxes//it's +=a ",";language
isLanguage = true;
break;
}
checkedBoxes += gadgetsAvailable[c].id;
}
}
if(!isLanguage)
//set an expiry date 1000 years into the future
var expireDate = new Date();
expireDate.setFullYear(expireDate.getFullYear() + 1000);
//store the cookie
document.cookie = "jsGadgets=" + escape(checkedBoxes) +
"; expires=" + expireDate.toUTCString();
}
function GadgetsGetCheckboxes()
{
//pull in the cookie and look for the jsGadgets key
var fullCookie = document.cookie;
var gadgetsPos = fullCookie.indexOf("jsGadgets=");
if(gadgetsPos < 0)
{
//nowe're gadgetsnot inon thea cookielanguage page
//this script does not apply
return new Array();
return;
}
var endPos = fullCookie.indexOf(";", gadgetsPos);
//check this page's "firstHeading" ID content for a category name
//split the gadget IDs by comma
var firstHeadingEl = document.getElementById("firstHeading");
var jsGadgets = fullCookie.substring(gadgetsPos + ("jsGadgets=").length,
var langName = (firstHeadingEl.textContent ? firstHeadingEl.textContent : firstHeadingEl.innerText);
(endPos > 0 ? endPos : fullCookie.length));
langName = langName.substring(("Category:").length, langName.length);
var checkIDs = unescape(jsGadgets).split(",");
//translateget thea list of IDsall totask apages liston ofthis page for arraylater indices,use
var tasksEl = document.getElementById("mw-pages");
//in keeping with the way the rest of this module works
var checkIndicesaEls = new ArraytasksEl.getElementsByTagName("a");
for(var g = 0; g < gadgetsAvailable.length; ++g)
//check to see if we already have link information about the current language
if(localStorage.languageLinks && localStorage.languageLinks[langName])
{
//we do
for(var c = 0; c < checkIDs.length; ++c)
//modify all of the links on the page to link directly to the current language's section
for(var i = 0; i < aEls.length; ++i)
{
if(gadgetsAvailableaEls[gi].idhref.indexOf("#") ==< checkIDs[c]0)
{
aEls[i].href += "#" + encodeURIComponent(localStorage.languageLinks[langName].aName);
checkIndices[checkIndices.length] = g;
break;
}
}
}
else
return checkIndices;
}
function GadgetsActivate()
{
//find the user preferences button and add a new list item to the right of it
var prefsEl = document.getElementById("pt-preferences");
if(!prefsEl)
{
//we do not have link information on the current language
var personalEl = document.getElementById("p-personal");
//start fetching task pages and searching through them, starting with the first task link on the page
if(!personalEl)
if(typeof SectionLinkActivate.linkNum == "undefined")
{
SectionLinkActivate.linkNum = 0;
return;
}
var liEls = personalEl.getElementsByTagName("li");
//only check the first five task links
if(!liEls || liEls.length < 2)
if(SectionLinkActivate.linkNum >= 5)
{
return;
}
prefsEl = liEls[liEls.length - 2];
}
var jsMenuEl = prefsEl.parentNode.insertBefore(
document.createElement("li"), prefsEl.nextSibling);
jsMenuEl.setAttribute("id", "pt-jsgadgets");
//add a new link named "My scripts" in the new list item
//from a semantics point of view, this is not great,
//but this way the styling kicks in to keep it consistent with its siblings
var jsLinkEl = jsMenuEl.appendChild(document.createElement("a"));
jsLinkEl.appendChild(document.createTextNode("My scripts"));
jsLinkEl.setAttribute("href", "javascript: void(0);");
jsLinkEl.style.position = "relative";
//add handlers for showing on mouseover and hiding on mouseout
GadgetsAddHandler(jsLinkEl, "mouseover", GadgetsMouseOver);
GadgetsAddHandler(jsLinkEl, "mouseout", GadgetsMouseOut);
//build a list for showing available JS gadgets
var modulesListEl = jsLinkEl.appendChild(document.createElement("ol"));
modulesListEl.setAttribute("id", "pt-jsgadgets-list");
modulesListEl.style.listStyle = "none";
modulesListEl.style.margin = 0;
modulesListEl.style.padding = 0;
modulesListEl.style.position = "absolute";
modulesListEl.style.top = "100%";
modulesListEl.style.left = 0;
modulesListEl.style.backgroundColor = "#fff";
modulesListEl.style.border = "1px solid #69c";
modulesListEl.style.padding = "0.5em";
modulesListEl.style.display = "none";
//raise the zIndex of the new button (as well as
//a few parents) so the menu overlaps the page
var zEl = modulesListEl;
for(var z = 0; z < 6 && zEl && zEl.style; ++z, zEl = zEl.parentNode)
{
zEl.style.zIndex = 100;
}
//add each of the gadgets to the list
for(var m = 0; m < gadgetsAvailable.length; ++m)
{
//add the list item element
var liEl = modulesListEl.appendChild(document.createElement("li"));
liEl.style.display = "block";
liEl.style.cssFloat = "none";
liEl.style.right = "auto";
liEl.style.left = 0;
liEl.style.textAlign = "left";
liEl.style.margin = 0;
liEl.style.padding = 0;
//fetch and process the task, and rerun this activation function when done
//add the checkbox
SectionLinkFetchFrom(aEls[SectionLinkActivate.linkNum].href, SectionLinkActivate);
var inputEl = document.createElement("input");
var checkboxId = "pt-jsgadgets-gadget" + m;
inputEl.setAttribute("type", "checkbox");
inputEl.setAttribute("id", checkboxId);
inputEl.setAttribute("value", m);
GadgetsAddHandler(inputEl, "click", GadgetsCreateCheckboxClosure(inputEl));
liEl.appendChild(inputEl);
//update the link number so we move on to the next link if the current one doesn't have this language
//add the label
++SectionLinkActivate.linkNum;
var labelEl = document.createElement("label");
labelEl.setAttribute("for", checkboxId);
labelEl.appendChild(document.createTextNode(gadgetsAvailable[m].name));
labelEl.style.paddingLeft = "1em";
liEl.appendChild(labelEl);
}
//fetch the saved checkboxes from the cookie
var checks = GadgetsGetCheckboxes();
for(var c = 0; c < checks.length; ++c)
{
//for each one that should be checked on page load,
//check the box, load, and activate it
document.getElementById("pt-jsgadgets-gadget" + checks[c]).checked = true;
GadgetsScriptLoad(checks[c]);
GadgetsScriptActivate(checks[c]);
}
}
//register the comparisonlink correcting script with the window's load event
if(window.addEventListener)
GadgetsAddHandler(window, "load", GadgetsActivate);
{
window.addEventListener("load", SectionLinkActivate, false);
}
else if(window.attachEvent)
{
window.attachEvent("onload", SectionLinkActivate);
}
else if(document.addEventListener)
{
document.addEventListener("load", SectionLinkActivate, false);
}
else
{
window.onload = SectionLinkActivate;
}
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