UserScript to load SyntaxHighlighter on-demand within the CCPForge CVS/SVN code browser

GForgeCodeSyntaxHighlight.user.js

// ==UserScript==
// @name           GForge SCM Syntax Highlighter
// @version        1.1.1
// @namespace      http://shawnchin.github.com
// @description    Provides syntax highlighting for CVS/SVN/Git Code Viewer
// @include        http://*/gf/project/*/scm*/?action=browse&*view=markup*
// @include        http://*/gf/project/*/scmgit/*;a=blob;*
// ==/UserScript==

// Note that GForge already loads jQuery (a rather old version!)
function with_jquery(f) {
  var script = document.createElement("script");
  script.type = "text/javascript";
  script.textContent = "(" + f.toString() + ")(jQuery)";
  document.body.appendChild(script);
};

with_jquery(function ($) {
  $(function () {
    //** selfupdatingscript starts here 
    //   (see https://gist.github.com/raw/874058/selfupdatingscript.user.js)
    var VERSION = '1.1.1'; //<<<<<<<<<<<<** DON'T FORGET TO UPDATE THIS!!!! *****
    var URL = "https://gist.github.com/raw/2399902/GForgeCodeSyntaxHighlight.user.js";

    if(window["selfUpdaterCallback:" + URL]) {
      window["selfUpdaterCallback:" + URL](VERSION);
      return;
    }

    function updateCheck(notifier) {
      window["selfUpdaterCallback:" + URL] = function (newver) {
        if(newver > VERSION) notifier(newver, VERSION, URL);
      }
      $("<script />").attr("src", URL).appendTo("head");
    }
    //**selfupdatingscript ends here (except for call to updateCheck further down in code)

    function is_scmgit() {
        return (location.href.split("/")[6] == "scmgit");
    }

    // Convert divs created by scmgit to a plain <pre> as used by CVS/SVN viewer
    function convert_scmgit($pre) {
      $(".page_body:first").children("div.pre").each(function() {
        $this = jQuery(this);
        $this.find("a").remove();
        $pre.append($this.text().replace(/&nbsp;/g, " ") + "\n");
        $this.remove();
      });
    }

    // Inject links to remote CSS files
    function load_css(base) {
      var c1 = document.createElement("link");
      c1.type = 'text/css';
      c1.rel = 'stylesheet';
      c1.href = base + 'styles/shCore.css';

      var c2 = document.createElement("link");
      c2.type = 'text/css';
      c2.rel = 'stylesheet';
      c2.href = base + 'styles/shThemeDefault.css';
      document.getElementsByTagName('head')[0].appendChild(c1).appendChild(c2);

    }

    // Convert paths for autoloading SyntaxHighlighter brushes
    function path() {
      var args = arguments, result = [];
      for(var i = 0; i < args.length; i++)
          result.push(args[i].replace('@', 'http://alexgorbatchev.com/pub/sh/current/scripts/'));
      return result
    };

    // Dynamically load and initialise SyntaxHighlighter
    function load_syntaxhighlighter($, callback) {
      var base_url = 'http://alexgorbatchev.com/pub/sh/current/';
      var url_core = base_url + 'scripts/shCore.js';
      var url_loader = base_url + 'scripts/shAutoloader.js';

      load_css(base_url);
      $.getScript(url_core, function(data, textStatus, jqxhr) {
        $.getScript(url_loader, function(data, textStatus, jqxhr) {
            console.log("loaded");
            SyntaxHighlighter.autoloader.apply(null, path(
              //'applescript            @shBrushAppleScript.js',
              //'actionscript3 as3      @shBrushAS3.js',
              'bash shell             @shBrushBash.js',
              //'coldfusion cf          @shBrushColdFusion.js',
              'cpp c                  @shBrushCpp.js',
              'c# c-sharp csharp      @shBrushCSharp.js',
              'css                    @shBrushCss.js',
              'delphi pascal          @shBrushDelphi.js',
              'diff patch pas         @shBrushDiff.js',
              'erl erlang             @shBrushErlang.js',
              'fortran   https://gist.github.com/raw/517349/shBrushFortran.js',
              //'groovy                 @shBrushGroovy.js',
              'java                   @shBrushJava.js',
              //'jfx javafx             @shBrushJavaFX.js',
              'js jscript javascript  @shBrushJScript.js',
              'perl pl                @shBrushPerl.js',
              'php                    @shBrushPhp.js',
              //'text plain             @shBrushPlain.js',
              'py python              @shBrushPython.js',
              'ruby rails ror rb      @shBrushRuby.js',
              //'sass scss              @shBrushSass.js',
              //'scala                  @shBrushScala.js',
              'sql                    @shBrushSql.js',
              'vb vbnet               @shBrushVb.js',
              'xml xhtml xslt html    @shBrushXml.js'
            ));

          SyntaxHighlighter.defaults.toolbar = false;
          SyntaxHighlighter.defaults.gutter = false;
          SyntaxHighlighter.all();
          callback();
        });
      });

    }

    if (is_scmgit()) {
      var $banner = $("div.page_path:first");
      var $code_container = $("<div></div>").insertAfter($banner);
      var $code_pre = $("<pre></pre>").appendTo($code_container);
    } else {
      var $code_container = $('#vc_markup');
      var $code_pre = $code_container.find("pre:first-child");
      var $banner = $code_container.prev(".vc_summary");
    }

    var choices = {
      "bash"   : "Bash / Shell",
      "cpp"    : "C / C++",
      "csharp" : "C#",
      "css"    : "CSS",
      "delphi" : "Delphi / Pascal",
      "diff"   : "diff / patch",
      "erlang" : "Erlang",
      "fortran" : "Fortran",
      "java"   : "Java",
      "js"     : "Javascript",
      "perl"   : "Perl",
      "php"    : "PHP",
      "python" : "Python",
      "ruby"   : "Ruby / Rails",
      "sql"    : "SQL",
      "vb"     : "VB / VB.Net",
      "xml"    : "XML / XHTML / XSLT / HTML"
    };

    var $dropdown = $("<select><option value=''>" + 
                    " ( Syntax Highlighting ) </option></select>");
    for (var key in choices) {
      $("<option value='" + key + "'>" + choices[key] + "</option>")
        .appendTo($dropdown);
    }

    $dropdown.css("float", "right").change(function() {
      $dropdown.attr("disabled", "disabled")
      $selected = $dropdown.find("option:selected");
      $selected.text($selected.text() + " (loading ...)");
      
      if (is_scmgit()) convert_scmgit($code_pre);
      $code_pre.addClass("brush: " + this.value);

      load_syntaxhighlighter($, function() {
        $dropdown.slideUp();
      });

    }).insertBefore($code_container);

    // Check for script updates. Display message if new version available.
    updateCheck(function(newver, oldver, url) {
      var msg = "A new version of the GForgeCodeSyntaxHighlight userscript is now available (" +
                newver + ", your installed version is " + oldver + "). <br /><br />" +
                "The latest version is available here : <a href='" + url + "'>" + url + "</a>.";
      $msgbox = $("<div></div>").html(msg)
                  .css("border", "2px solid rgb(255, 200, 200)")
                  .css("padding", "10px")
                  .css("margin", "3px")
                  .css("color", "rgb(200, 10, 10)")
                  .hide().insertBefore($dropdown).slideDown();
      $("<a href='#' style='display:block; float:right;'>close</a>").click(function(e) {
        e.preventDefault();
        $msgbox.slideUp();
      }).appendTo($msgbox);

    });

  });
});