User:Wotheina/diff-permalink.js

// <nowiki>
// based on [[User:Enterprisey/diff-permalink.js]] 2022-06-12
// rev 2022-11-25
$.when( $.ready, mw.loader.using( [ "mediawiki.util" ] ) ).then( function () {
    var suffix = mw.config.get( "wgDiffNewId" );
    var page;
    if( suffix ) {
        if( document.getElementsByClassName( "diff-multi" ).length ||
            mw.config.get("wgCanonicalSpecialPageName") === "ComparePages" ) {
            suffix = mw.config.get( "wgDiffOldId" ) + "/" + suffix;
        }

		var editorDOM = document.getElementById("mw-diff-ntitle2");
		var editorcontribs;
		var editorcontribsarray = editorDOM.getElementsByClassName( "mw-usertoollinks-contribs" ); // wiki site dependent
		if ( 1 <= editorcontribsarray.length ) {
			editorcontribs = editorcontribsarray[0].title; // wiki site dependent
		} else {
			editorcontribs = editorDOM.getElementsByClassName( "mw-userlink" )[0].title; // wiki site dependent
		}
		var editornamei = editorcontribs.indexOf('/'); 
		var editorname = editorcontribs.substring(editornamei+1); // exclude "Special:Contributions/". wiki site dependent

        page = "[[Special:Diff/" + suffix + "]] by [[" + editorcontribs + "|" + editorname + "]]";
    } else {
        var oldidMatch = mw.util.getParamValue( "oldid" );
        if( oldidMatch ) {
            page = "[[Special:Permalink/" + oldidMatch + "]]";
        } else return; // nothing to do here
    }

    var permalinkEl = $( "<div>" ).append(
        "Permalink to this " + ( suffix ? "diff" : "oldid" ) + ": ",
        $( "<input>" )
            .attr( { "id": "diff-permalink-link" } )
            .attr( "size", page.length )
            .val( page ),
        $( "<button>" )
            .text( "Copy" )
            .css( { "cursor": "pointer", "margin-left": "0.5em" } )
            .click( function () {
                document.getElementById( "diff-permalink-link" ).select();
                document.execCommand( "copy" );
            } ) );

    if( suffix ) {
        $( "#bodyContent" ).prepend( permalinkEl );
    } else {
        $( "#contentSub" ).after( permalinkEl );
    }

//    $( "#diff-permalink-link" ).attr( "size", page.length ); // resize to diff length
} );
// </nowiki>