pentadactyl-pm/content/util.js

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vimperator.util = {
    escapeHTML: function(str)
    {   
        // XXX: the following code is _much_ slower than a simple .replace()
        // :history display went down from 2 to 1 second after changing
        //
        // var e = window.content.document.createElement("div");
        // e.appendChild(window.content.document.createTextNode(str));
        // return e.innerHTML;
        return str.replace("&", "&amp;", "g").replace("<", "&lt;", "g").replace(">", "&gt;", "g");
    },

    // TODO: use :highlight color groups
    // if "process_strings" is true, any passed strings will be surrounded by " and
    // any line breaks are displayed as \n
    colorize: function(arg, process_strings)
    {
        var type = typeof(arg);

        // some objects like window.JSON or getBrowsers()._browsers need the try/catch
        try
        {
            if (type == "number")
            {
                return "<span style=\"color: red;\">" + arg + "</span>";
            }
            else if (type == "string")
            {
                if (process_strings)
                    arg = '"' + vimperator.util.escapeHTML(arg.replace(/\n/, "\\n")) + '"';

                return "<span style=\"color: green;\">" + arg + "</span>";
            }           
            else if (type == "boolean")
            {
                return "<span style=\"color: blue;\">" + arg + "</span>";
            }
            else if (arg == null || arg == "undefined")
            {
                return "<span style=\"color: blue;\">" + arg + "</span>";
            }
            else if (type == "object" || type == "function")
            {
                // for java packages value.toString() would crash so badly 
                // that we cannot even try/catch it
                if (/^\[JavaPackage.*\]$/.test(arg)) 
                    return "[JavaPackage]";

                var str = arg.toString();
                if (typeof str == "string")  // can be "undefined"
                    return vimperator.util.escapeHTML(str);
                else
                    return "undefined";
            }
        }
        catch (e)
        {
            return "&lt;unknown&gt;";
        }

        return "&lt;unknown type&gt;";
    }
}

// vim: set fdm=marker sw=4 ts=4 et: