// ==UserScript==
// @name           Firebug JSON formatting
// @namespace      http://efcl.info/
// @include        main
// ==/UserScript==
/*
  参考
    Firebug Chrome Authority
    http://d.hatena.ne.jp/Griever/
*/
(function(){
	/**
	 *    @version 0.1.1
	 */
	var JSONDecoder = {};
	 
	/**
	 *    typeofの拡張
	 *    ArrayとかRegExpとかnullとかも判別する
	 */
	JSONDecoder.typeOf = function(value) {
	    var type = typeof value;
	    switch (type) {
	        case "object":
	            if (value instanceof Array) {
	                type = "array";
	            } else if (!(value instanceof Object)) {
	                type = "null";
	            }
	            //no break
	        case "function":
	            if (value instanceof RegExp) {
	                type = "regexp";
	            }
	            break;
	    }
	    return type;
	}
	/**
	 *    JSONをFirebugのコンソールに書き出す
	 */
	JSONDecoder.toConsole = function(json) {
		Application.console.log(json);
	    JSONDecoder.out = function(line) { Application.console.log(line); };
	    JSONDecoder.decode("", json, "");
	}

	JSONDecoder.toString = function(json) {
	    var decoded = "";
	    JSONDecoder.out = function(line) { decoded += (line + "\n"); };
	    JSONDecoder.decode("", json, "");
	    return decoded;
	}
	/**
	 *    JSONを解析する
	 */
	JSONDecoder.decode = function(index, value, indent) {
	    var type = JSONDecoder.typeOf(value);
	    var pack = undefined;
	 
	    switch (type) {    //型別に見やすくする
	        case "object" :
	            pack = ["{", "}"];
	            break;
	        case "array" :
	            pack = ["[", "]"];
	            break;
	        case "function" :
	            type = "";
	            //no break
	        case "string" :
	            value = value.toString().replace(/\n/g, "\n" + indent);    //全体をインデント
	            break;
	        case "undefined" :
	            type = "";
	            value = "undefined";
	            break;
	        case "null" :
	            type = "";
	            value = "null";
	            break;
	    }
	 
	    if (type) {
	        type = " (" + type + ")";    //整形
	    }
	 
	    if (pack) {    //子要素がある場合は再帰処理
	        JSONDecoder.out(indent + index + type + pack[0]);
	        for (var i in value) {
	            JSONDecoder.decode(i, value[i], indent + "\t");
	        }
	        JSONDecoder.out(indent + pack[1]);
	    } else {
	        JSONDecoder.out(indent + index + type + ": " + value);
	    }
	}
	/**
	 *    文字列をObjectに変換する
	 */
	JSONDecoder.str2json = function(str) {
		try {
		    eval("var json = " + str + ";");
		    return json;
		} catch (e) {
			return false;
		}
	}

	var commandLine = document.getElementById('fbLargeCommandLine');
	var toolbar = document.getElementById('fbCommandToolbar');

	var Chrome = document.createElement('toolbarbutton');
	Chrome.setAttribute('label', 'JSON');
	toolbar.insertBefore(Chrome, toolbar.lastChild);
	Chrome.addEventListener('command', function(){
		JSONDecoder.toConsole(JSONDecoder.str2json(commandLine.value));
	},false)
})();