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(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;");
    },

    // 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;";
    },

    // takes a string like 'google bla, www.osnews.com'
    // and returns an array ['www.google.com/search?q=bla', 'www.osnews.com']
    stringToURLArray: function (str)
    {
        var urls = str.split(/\s*\,\s+/);

        begin: for (var url = 0; url < urls.length; url++)
        {
            var new_url = vimperator.buffer.URL;
            var matches;

            // strip each 'URL' - makes things simpler later on
            urls[url] = urls[url].replace(/^\s+/, "").replace(/\s+$/, "");

            // FIXME: not really that good (doesn't handle .. in the middle)
            // check for ./ and ../ (or even .../) to go to a file in the upper directory
            if (matches = urls[url].match(/^(?:\.$|\.\/(\S*))/))
            {
                var tail = matches[1] || "";
                urls[url] = new_url.replace(/(.+\/)[^\/]*/, "$1" + tail);  // NOTE: escape / in character sets so as not to break Vim syntax highlighting
                continue;
            }
            else if (matches = urls[url].match(/^(?:\.\.$|\.\.\/(\S*))/))
            {
                var tail = matches[1] || "";
                urls[url] = new_url.replace(/(.+\/)[^\/]*/, "$1../" + tail);
                continue;
            }
            else if (matches = urls[url].match(/^(?:\.\.\.$|\.\.\.\/(\S*))/))
            {
                var location = window.content.document.location;
                var tail = matches[1] || "";
                urls[url] = location.protocol + "//" + location.host + "/" + tail;
                continue;
            }

            // if the string doesn't look like a valid URL (i.e. contains a space
            // or does not contain any of: .:/) try opening it with a search engine
            // or keyword bookmark
            if (/\s/.test(urls[url]) || !/[.:\/]/.test(urls[url]))
            {
                matches = urls[url].match(/^(\S+)(?:\s+(.+))?$/);

                var alias = matches[1];
                var text = matches[2] || null;

                // TODO: it would be clearer if the appropriate call to
                // getSearchURL was made based on whether or not the first word was
                // indeed an SE alias rather than seeing if getSearchURL can
                // process the call usefully and trying again if it fails - much
                // like the comments below ;-)

                // check if the first word is a search engine
                var search_url = vimperator.bookmarks.getSearchURL(text, alias);
                if (search_url/* && search_url.length >= 1*/)
                {
                    urls[url] = search_url;
                    continue;
                }
                else // the first word was not a search engine, search for the whole string in the default engine
                {
                    search_url = vimperator.bookmarks.getSearchURL(urls[url], null);
                    if (search_url/* && search_url.length >= 1*/)
                    {
                        urls[url] = search_url;
                        continue;
                    }
                }
            }

            // if we are here let Firefox handle the url and hope it does
            // something useful with it :)
        }

        return urls;
    },

    highlightURL: function (str, force)
    {
        if (force || /^[a-zA-Z]+:\/\//.test(str))
            return "<a class='hl-URL' href='" + str + "'>" + vimperator.util.escapeHTML(str) + "</a>";
        else
            return str;
    },

    formatBytes: function (num, decimalPlaces, humanReadable)
    {
        const unitVal = ["Bytes", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"];
        var unitIndex = 0;
        var tmpNum = parseInt(num) || 0;
        var strNum = [tmpNum + ""];

        if (humanReadable)
        {
            while (tmpNum >= 1024)
            {
                tmpNum /= 1024;
                if (++unitIndex > (unitVal.length - 1))
                    break;
            }
            let decPower = Math.pow(10, decimalPlaces);
            strNum = ((Math.round(tmpNum * decPower) / decPower) + "").split(".", 2);

            if (!strNum[1])
                strNum[1] = "";
            while (strNum[1].length < decimalPlaces) // padd with "0" to the desired decimalPlaces)
                strNum[1] += "0";
        }

        for (var u = strNum[0].length - 3; u > 0; u -= 3) // make a 10000 a 10,000
            strNum[0] = strNum[0].substring(0, u) + "," + strNum[0].substring(u, strNum[0].length);

        if (unitIndex) // decimalPlaces only when > Bytes
            strNum[0] += "." + strNum[1];

        return strNum[0] + " " + unitVal[unitIndex];
    }
};

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