/*
 * Helper functions
 */
function stripStr(str) {
	return str.replace(/^\s*/, "").replace(/\s*$/, "");
}

// Multiline strip
function stripStrML(str) {
	// Split because m flag doesn't exist before JS1.5 and we need to
	// strip newlines anyway
	var parts = str.split('\n');
	for (var i=0; i<parts.length; i++)
		parts[i] = stripStr(parts[i]);

	// Don't join with empty strings, because it "concats" words
	// And strip again
	return stripStr(parts.join(" "));
}

/*
 * C-printf like function, which substitutes %s with parameters
 * given in list. %%s is used to escape %s.
 *
 * Doesn't work in IE5.0 (splice)
 */ 
function printf(S, L) {
    if (!L) return S;

    var nS = "";
    var tS = S.split("%s");

    for(var i=0; i<L.length; i++) {
            if (tS[i].lastIndexOf('%') == tS[i].length-1 && i != L.length-1)
                    tS[i] += "s"+tS.splice(i+1,1)[0];
            nS += tS[i] + L[i];
    }
    return nS + tS[tS.length-1];
}

/*
 * i18n
 */
function i18n(i18n_dict) {
    this.i18nd = i18n_dict;

    // Change to entity representation non-ASCII characters
    this.toEntity = function (str) {
            var newstr = "";
            for (var i=0;i<str.length; i++) {
                    if (str.charCodeAt(i) > 128)
                            newstr += "&#"+str.charCodeAt(i)+";";
                    else
                            newstr += str.charAt(i);
            }
            return newstr;
    }

    // Return translation, if translation dictionary exists and has a translation.
    this.translateIt = function (str, params) {
            var transl = str;
            if (this.i18nd && this.i18nd[str])
                    transl = this.i18nd[str];
            return printf(transl, params);
    }

    this.translateNodes = function () {
        var nodes = document.getElementsByTagName("*");
        for (var i=0;i<nodes.length;i++)
        if (nodes[i].className.match("i18n")) {
            var orig = stripStrML(nodes[i].innerHTML);
            var transl = this.translateIt(orig);

            // If translation not found, try again with
            // entity representation
            if (transl == orig) transl = this.translateIt(this.toEntity(orig));
            nodes[i].innerHTML = transl;
        }
    }
}