「JavaScript」JSONデータをフォーマットする方法

2015年1月20日

サンプルコード：

var JSONFormat = (function(){
var _toString = Object.prototype.toString;
function format(object, indent_count){
var html_fragment = ";
switch(_typeof(object)){
case 'Null’ :0
html_fragment = _format_null(object);
break;
case 'Boolean’ :
html_fragment = _format_boolean(object);
break;
case 'Number’ :
html_fragment = _format_number(object);
break;
case 'String’ :
html_fragment = _format_string(object);
break;
case 'Array’ :
html_fragment = _format_array(object, indent_count);
break;
case 'Object’ :
html_fragment = _format_object(object, indent_count);
break;
}
return html_fragment;
};

function _format_null(object){
return '<span class="json_null">null</span>’;
}

function _format_boolean(object){
return '<span class="json_boolean">’ + object + '</span>’;
}

function _format_number(object){
return '<span class="json_number">’ + object + '</span>’;
}

function _format_string(object){
if(0 <= object.search(/^http/)){
object = '<a href="' + object + '" target="_blank" class="json_link">’ + object + '</a>’
}
return '<span class="json_string">"' + object + '"</span>’;
}

function _format_array(object, indent_count){
var tmp_array = [];
for(var i = 0, size = object.length; i < size; ++i){
tmp_array.push(indent_tab(indent_count) + format(object[i], indent_count + 1));
}
return '[\n’
+ tmp_array.join(',\n’)
+ '\n’ + indent_tab(indent_count – 1) + ']’;
}

function _format_object(object, indent_count){
var tmp_array = [];
for(var key in object){
tmp_array.push( indent_tab(indent_count) + '<span class="json_key">"' + key + '"</span>:’ + format(object[key], indent_count + 1));
}
return '{\n’
+ tmp_array.join(',\n’)
+ '\n’ + indent_tab(indent_count – 1) + '}’;
}

function indent_tab(indent_count){
return (new Array(indent_count + 1)).join(' ');
}

function _typeof(object){
var tf = typeof object,
ts = _toString.call(object);
return null === object ? 'Null’ :
'undefined’ == tf ? 'Undefined’ :
'boolean’ == tf ? 'Boolean’ :
'number’ == tf ? 'Number’ :
'string’ == tf ? 'String’ :
'[object Function]’ == ts ? 'Function’ :
'[object Array]’ == ts ? 'Array’ :
'[object Date]’ == ts ? 'Date’ : 'Object’;
};
function loadCssString(){
var style = document.createElement('style’);
style.type = 'text/css’;
var code = Array.prototype.slice.apply(arguments).join(");
try{
style.appendChild(document.createTextNode(code));
}catch(ex){
style.styleSheet.cssText = code;
}
document.getElementsByTagName('head’)[0].appendChild(style);
}
loadCssString(
'.json_key{ color: purple;}’,
'.json_null{color: red;}’,
'.json_string{ color: #077;}’,
'.json_link{ color: #717171;}’,
'.json_array_brackets{}’);

var _JSONFormat = function(origin_data){
this.data = 'string’ != typeof origin_data ? origin_data :
JSON && JSON.parse ? JSON.parse(origin_data) : eval('(' + origin_data + ')’);
};
_JSONFormat.prototype = {
constructor : JSONFormat,
toString : function(){
return format(this.data, 1);
}
}

return _JSONFormat;

})();

function create_result_contatiner(){
var $result = $('<pre id="result" style=" width: 100%; height: 100%; overflow: scroll; overflow-x: scroll; overflow-y:scroll"></pre>’)
var $result_container = $('<div id="result_container" style="position: fixed; top: 1%; right: 8px; width: 5%; height: 97%; margin: 0; padding: 0; border:1px solid skyblue; background: #f8f8f8; line-height: 1.2em; font-size: 14px; cursor: pointer;"></div>’);
$result_container.append($result);
$result_container.hover(function(){
$(this).stop(true).animate({width:’50%’}, 'slow’);
}, function(){
$(this).stop(true).animate({width:’5%’}, 'slow’);
});
$('body’).append($result_container);
return [$result_container, $result];
}

(function request_intercept(args){
var $result_container = args[0],
$result = args[1];
$('form *[type="submit"]’).bind('click’, function(){
var _form = $(this).parents('form’),
_action = (_form.attr('action’) || './’),
_method = (_form.attr('method’) || 'get’).toLowerCase(),
_params = {};
_form.find('input[type="text"]’).each(function(){
var item = $(this);
_params[item.attr('name’)] = item.val();
});
$['get’ == _method ? 'get’ : 'post’](_action, _params, function(response){
try{
var j = new JSONFormat(JSON && JSON.parse ? JSON.parse(response) : eval('(' + response + ')’));
$result.html(j.toString());
}catch (e){
$result.html($result.text(response).html());
}
$result_container.stop(true).animate({width:’50%’}, 'slow’);
});
return false;
});
})(create_result_contatiner());