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Add a console to "Stack Snippets" executable code on StackExchange
// ==UserScript==
// @name Stack Snippets Console
// @namespace http://stackexchange.com/users/3846032/scimonster
// @version 1.1.0
// @description Add a console to "Stack Snippets" executable code on StackExchange
// @include http://*.stackexchange.com/*
// @include http://stackoverflow.com/*
// @include http://*.stackoverflow.com/*
// @include http://stacksnippets.net/*
// @copyright 2014+, Scimonster
// ==/UserScript==
if (!window.postMessage) {
console.log('postMessage not supported; Snippets Console cannot work');
return;
}
if (location.hostname == 'stacksnippets.net') {
(function(){
// define some functions
function isSEDomainName(dname) {
return !!~["stackoverflow.com", "stackexchange.com"].indexOf(dname.split('.').slice(-2).join('.'));
}
function URLparser(href) {
var p = document.createElement('a');
p.href = href;
return p;
}
// listen for the ping
this.addEventListener('message', function(ev){
if (isSEDomainName(URLparser(ev.origin).hostname) && ev.data == 'console ping') {
// passes the test
listen(ev);
}
}, false);
// listen for console.log()s
function listen(ev) {
var oldLog = console.log;
function log(firstArg) {
var args = [].slice.call(arguments);
oldLog.apply(console, args); // use the default console.log()
if (typeof firstArg == 'string') { // might require replacing
if (~firstArg.indexOf('%s') || ~firstArg.indexOf('%d') || ~firstArg.indexOf('%i') || ~firstArg.indexOf('%f')) {
// there is something to be replaced
args.shift();
firstArg = firstArg.replace(/%[sdif]/g, function(match){
switch (match) {
case '%s': return args.shift().toString();
case '%d': case '%i': return parseInt(args.shift());
case '%f': return parseFloat(args.shift());
default: return match;
}
});
args.unshift(firstArg);
}
}
// replacements done, ready for concat
var text = args.map(function(a){
if (typeof a == 'object') {
try {
return JSON.stringify(a);
} catch(e) {
return "{bad object}";
}
}
return a.toString();
});
postMessage('log', text.join(''));
}
this.console.log = log;
this.addEventListener('error', function(ev){
postMessage('err', ev.message);
}, false);
function postMessage(type, message) {
ev.source.postMessage({
type: type,
message: message,
time: new Date,
snippet: this.name // the iframe
}, ev.origin);
}
}
})();
} else {
(function(){
function padNum(num, length) {
num = num.toString();
return num.length < length ? padNum('0' + num, length) : num;
}
$(document).on('click', 'div.snippet-result input[type=button]', function(){
var container = $(this).parent().parent();
container.children('.snippet-console').remove();
if (!this.className) { // the run button
$('<div class="snippet-console"><h6><a href="http://stackapps.com/q/4931/28683" target="_blank">Snippet Console</a> <small>v1.1.0</small></h6><ul></ul></div>').appendTo(container).css({
position: 'relative',
width: '100%',
maxHeight: 200,
borderTopWidth: 1,
borderTopStyle: 'solid',
borderTopColor: 'rgb(170, 170, 170)',
overflow: 'auto',
display: 'none'
}).children('ul').css({
listStyleType: 'none',
fontFamily: 'monospace'
});
var snippet = container.find('iframe')[0];
snippet.onload = function(){
setTimeout(function(){
snippet.contentWindow.postMessage('console ping', "*");
// need to accept all because the iframe has no URL
}, 100);
};
}
});
window.addEventListener('message', function(ev){
if (ev.origin == 'null' && ev.data.snippet) { // seems to be a snippet
var time = padNum(ev.data.time.getHours(),2)+':'+padNum(ev.data.time.getMinutes(),2)+':'+padNum(ev.data.time.getSeconds(),2)+'.'+padNum(ev.data.time.getMilliseconds(),3);
var li = $('<li data-type="'+ev.data.type+'"><span style="color:gray">'+time+':</span> <span></span></li>');
li.find('span').last().text(ev.data.message);
if (ev.data.type == 'err') {
li.find('span').last().css('color', 'red');
}
var snCons = $('iframe[name="'+ev.data.snippet+'"]').parent().siblings('.snippet-console').show();
snCons.children('ul').append(li);
snCons.scrollTop(snCons.children('ul').height()); // scroll to bottom
}
}, false);
})();
}