User:Proteins/showrandomlinksonpage.js References

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Documentation for this user script can be added at User:Proteins/showrandomlinksonpage.

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//<pre>

// Create a slideshow of random articles linked in the article (a so-called "aleation" or an "aleatory fugue")

//

// To use this script, add "importScript('User:Proteins/showrandomlinksonpage.js');" to your monobook.js subpage 

// under your user page, as you can see at User:Proteins/monobook.js



// Global variables

var new_window;

var wait_time = 0;

var random_link_index = 0;

var random_link_href_list = new Array();

var random_link_title_list = new Array();



function timeoutRoutine()

{

	alert("Wait = " + wait_time + "  Slide " + random_link_index + ": " + random_link_title_listrandom_link_index]);

	new_window.location = random_link_href_listrandom_link_index];

}



function showRandomLinksOnPage() { 

	var alert_string = "";



	var top_node;



	var hyperlinks;

	var num_hyperlinks = 0;



	var random_double = 0.5;

	var random_hyperlink_index = 0;



	var random_link;

	var random_link_href = "";

	var random_link_title = "";



	var num_iterations = 0;

	var max_num_iterations = 100;



	var bad_link = true;



	var num_random_links = 0;



// Get the bodyContent node

	top_node = document.getElementById('bodyContent');

	if (!top_node) { 

		window.alert("There is no bodyContent node in this article.");

		return;

	}

 

// Get a list of the hyperlinks 

	hyperlinks = top_node.getElementsByTagName("A");

	if (!hyperlinks) { 

		window.alert("There are no hyperlinks in this article.");

		return;

	}

	num_hyperlinks = hyperlinks.length;

	if (num_hyperlinks < 1) { 

		window.alert("There are no hyperlinks in this article.");

		return;

	}





	num_random_links = 5;

	random_link_index = 0;

	random_link_href_list0 = "";

	random_link_title_list0 = "";



	while (random_link_index < num_random_links) { 



		// Choose a random hyperlink 

		bad_link = true;

		num_iterations = 0;

		random_link = null;

		random_link_href = "";

		random_link_title = "";



		while ((num_iterations<max_num_iterations) && (bad_link)) {

			num_iterations++;



			random_double = num_hyperlinks * Math.random();

			random_hyperlink_index = Math.floor(random_double);

			if ((random_hyperlink_index < 0) || (random_hyperlink_index >= num_hyperlinks)) { continue; }



			random_link = hyperlinksrandom_hyperlink_index];

			random_link_href = random_link.href;

			random_link_title = random_link.title;



			if ((!random_link) || (!random_link_title) || (!random_link_title)) {

				// Check that all three exist

				continue;

			} else if (random_link.className) {

				// Don't follow external links

				continue;

			} else if (random_link_title.match(/\(page does not exist\)$/ig)) {

				// Don't follow red links

				continue;

			} else if (random_link_title.match(/^Image:/ig)) {

				// Don't follow Image links

				continue;

			} else if (random_link_title.match(/^Category:/ig)) {

				// Don't follow Category links

				continue;

			} else if (random_link_title.match(/^Special:/ig)) {

				// Don't follow links to Special pages

				continue;

 			} else if ((random_link_title.match(/^Edit\ssection:/i)) && (random_link_href.match(/action\=edit/i))) {

				// Don't follow edit links

				continue;

			}



			if (wgNamespaceNumber == 0) { // special behavior for Main article space

				if (random_link.id) { continue; }

				if (random_link_href.match(/Talk:/ig)) { continue; } 

				if (random_link_href.match(/Wikipedia:/ig)) { continue; } 

				if (random_link_href.match(/Wikipedia talk:/ig)) { continue; } 

				if (random_link_href.match(/Portal:/ig)) { continue; } 

				if (random_link_href.match(/Portal talk:/ig)) { continue; } 

				if (random_link_href.match(/User:/ig)) { continue; } 

				if (random_link_href.match(/User talk:/ig)) { continue; } 

				if (random_link_href.match(/Help:/ig)) { continue; } 

				if (random_link_href.match(/Help talk:/ig)) { continue; } 

				if (random_link_href.match(/Template:/ig)) { continue; } 

				if (random_link_href.match(/Template talk:/ig)) { continue; } 

				if (random_link_href.match(/Category:/ig)) { continue; } 

				if (random_link_href.match(/Category talk:/ig)) { continue; } 

				if (random_link_href.match(/File:/ig)) { continue; } 

				if (random_link_href.match(/File talk:/ig)) { continue; } 

				if (random_link_href.match(/MediaWiki:/ig)) { continue; } 

				if (random_link_href.match(/MediaWiki talk:/ig)) { continue; } 

			} // closes check for Main article space



			bad_link = false;



		} // closes loop generating a random hyperlink



		// Add the randomly chosen link to the list



		if (bad_link == false) {

			random_link_index++;

			random_link_href_listrandom_link_index = random_link_href;

			random_link_title_listrandom_link_index = random_link_title;

		} else {

			alert_string = "Unable to find a suitable random link " + random_link_index + " in " + max_num_iterations + " attempts.\n";

			window.alert(alert_string);

			break;

		}

	}

	

	num_random_links = random_link_index;

	if (num_random_links > 0) { 

		alert_string = "Show slideshow of " + num_random_links + " random links from this page\?\n\n";

		for (random_link_index=1; 

		     random_link_index<=num_random_links; 

		     random_link_index++) {

			alert_string += random_link_title_listrandom_link_index + "\n";

			if (random_link_index%5 == 0) { alert_string += "\n"; }

		}

		if (window.confirm(alert_string) == false) { return; }

			

		random_link_href = random_link_href_list1];

		new_window = window.open(random_link_href, "new_window");

		random_link_index = 2;

		new_window.setTimeout("timeoutRoutine();", 3000);

//		for (random_link_index=2; 

//		     random_link_index<=num_random_links; 

//		     random_link_index++) {

//				if (window.confirm("Continue slideshow to \"" + random_link_title_list[random_link_index] + "\"\?") == false) { return; }

//				random_link_href = random_link_href_list[random_link_index];

//				new_window.location = random_link_href;

//				wait_time = 3000 * (random_link_index - 1);

//				new_window.setTimeout("timeoutRoutine();", wait_time);

//new_window.setTimeout("new_window.location=" + random_link_href_list[random_link_index]+ ";",wait_time);

//   new_window.setTimeout("if (new_window.confirm('Continue slideshow?') == false) { break; }",800);

//		}

	}

} // closes function showRandomLinksOnPage()



$(function () {

mw.util.addPortletLink('p-navigation', 'javascript:showRandomLinksOnPage()', 'Show random links', 'ca-slideshow', 'Show sequence of random links from this page', '$', '');

});

 

//</pre>