⚠️ Warning: This is a draft ⚠️

This means it might contain formatting issues, incorrect code, conceptual problems, or other severe issues.

If you want to help to improve and eventually enable this page, please fork RosettaGit's repository and open a merge request on GitHub.

//


/*
### ==================================

This menu script was written by
Tyrok1, and has been tested on Fx 3.6.6,
Cr 5.0.375.99, Epiphany 2.30.2,
Midori 0.2.2

### ==================================
*/

var gadgetsAvailable = [
					{
						id: "LanguageComparison",
						name: "Language comparison",
						url: "http://rosettacode.org/mw/index.php" +
							"?title=Rosetta_Code:Language_comparison_script" + 
							"&action=raw&ctype=text/javascript",
						prefix: "Compare"
					},
					{
						id: "Highlight",
						name: "Syntax Highlight Color Picker",
						url: "http://rosettacode.org/mw/index.php" +
							"?title=Rosetta_Code:Syntax_Highlight_Color_Picker" +
							"&action=raw&ctype=text/javascript",
						prefix: "Highlight"
					},
					{
						id: "UtilityButtonBar",
						name: "Utility button bar",
						url: "http://rosettacode.org/mw/index.php" +
							"?title=Rosetta_Code:Per-Code_Example_Buttonbar" +
							"&action=raw&ctype=text/javascript",
						prefix: "ButtonBar"
					}
				];

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 GadgetsMouseOver()
{
	//show the scripts dropdown
	document.getElementById("pt-jsgadgets-list").style.display = "block";
}

function GadgetsMouseOut()
{
	//hide the scripts dropdown
	document.getElementById("pt-jsgadgets-list").style.display = "none";
}

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)
	{
		if(checkboxEl.checked)
		{
			if(checkedBoxes != "")
			{
				checkedBoxes += ",";
			}
			checkedBoxes += gadgetsAvailable[c].id;
		}
	}
	
	//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)
	{
		//no gadgets in the cookie
		return new Array();
	}
	var endPos = fullCookie.indexOf(";", gadgetsPos);
	
	//split the gadget IDs by comma
	var jsGadgets = fullCookie.substring(gadgetsPos + ("jsGadgets=").length,
					(endPos > 0 ? endPos : fullCookie.length));
	var checkIDs = unescape(jsGadgets).split(",");
	
	//translate the list of IDs to a list of array indices,
	//in keeping with the way the rest of this module works
	var checkIndices = new Array();
	for(var g = 0; g < gadgetsAvailable.length; ++g)
	{
		for(var c = 0; c < checkIDs.length; ++c)
		{
			if(gadgetsAvailable[g].id == checkIDs[c])
			{
				checkIndices[checkIndices.length] = g;
				break;
			}
		}
	}
	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)
	{
		var personalEl = document.getElementById("p-personal");
		if(!personalEl)
		{
			return;
		}
		var liEls = personalEl.getElementsByTagName("li");
		if(!liEls || liEls.length < 2)
		{
			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;
		
		//add the checkbox
		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);
		
		//add the label
		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 comparison script with the window's load event
GadgetsAddHandler(window, "load", GadgetsActivate);
//