add chrome like dev console! fixes #56

src/index.html

@@ -101,6 +101,25 @@
 				</div>
 				<div class="demo-side" id="js-demo-side">
 					<iframe src="about://blank" frameborder="0" id="demo-frame"></iframe>
+					<div id="consoleEl" class="console">
+						<div id="consoleLogEl" class="console__log" class="code">
+							<div class="js-console__header  code-wrap__header" title="Double click to toggle console">
+								<span class="code-wrap__header-label">Console</span>
+								<div class="code-wrap__header-right-options">
+									<a class="code-wrap__header-btn" title="Clear console" d-click="clearConsole">
+										<svg>
+						  					<use xlink:href="#cancel-icon"></use>
+										</svg>
+									</a>
+									<a class="code-wrap__header-btn  code-wrap__collapse-btn" title="Toggle console" d-click="toggleConsole">
+									</a>
+								</div>
+							</div>
+						</div>
+						<div id="consolePromptEl" class="console__prompt">
+							<input type="" name="" class="full-width" style="background: none;border:0;">
+						</div>
+					</div>
 				</div>
 			</div>
 			<div class="footer">
@@ -577,6 +596,11 @@
 					<path d="M8,5.14V19.14L19,12.14L8,5.14Z" />
 				</svg>
 			</symbol>
+			<symbol id="cancel-icon" viewBox="0 0 24 24">
+				<svg>
+					<path d="M12,2A10,10 0 0,1 22,12A10,10 0 0,1 12,22A10,10 0 0,1 2,12A10,10 0 0,1 12,2M12,4A8,8 0 0,0 4,12C4,13.85 4.63,15.55 5.68,16.91L16.91,5.68C15.55,4.63 13.85,4 12,4M12,20A8,8 0 0,0 20,12C20,10.15 19.37,8.45 18.32,7.09L7.09,18.32C8.45,19.37 10.15,20 12,20Z" />
+				</svg>
+			</symbol>
 		</svg>
 
 		<script src="lib/codemirror/lib/codemirror.js"></script>

src/screenlog.js

@@ -0,0 +1,174 @@
+(function () {
+
+	var logEl,
+		isInitialized = false,
+		_console = {}; // backup console obj to contain references of overridden fns.
+		_options = {
+			bgColor: 'black',
+			logColor: 'lightgreen',
+			infoColor: 'blue',
+			warnColor: 'orange',
+			errorColor: 'red',
+			freeConsole: false,
+			css: '',
+			autoScroll: true,
+			proxyCallback: null,
+			noUi: false
+		};
+
+	function createElement(tag, css) {
+		var element = document.createElement(tag);
+		element.style.cssText = css;
+		return element;
+	}
+
+	function createPanel() {
+		var div = createElement('div', 'z-index:2147483647;font-family:Helvetica,Arial,sans-serif;font-size:10px;font-weight:bold;padding:5px;text-align:left;opacity:0.8;position:fixed;right:0;top:0;min-width:200px;max-height:50vh;overflow:auto;background:' + _options.bgColor + ';' + _options.css);
+		return div;
+	}
+
+	function genericLogger(color) {
+		return function() {
+			if (_options.proxyCallback) {
+				_options.proxyCallback.apply(null, arguments);
+			}
+			if (_options.noUi) { return; }
+			var el = createElement('div', 'line-height:18px;min-height:18px;background:' +
+				(logEl.children.length % 2 ? 'rgba(255,255,255,0.1)' : '') + ';color:' + color); // zebra lines
+			var val = [].slice.call(arguments).reduce(function(prev, arg) {
+				return prev + ' ' + (typeof arg === "object" ? JSON.stringify(arg) : arg);
+			}, '');
+			el.textContent = val;
+
+			logEl.appendChild(el);
+
+			// Scroll to last element, if autoScroll option is set.
+			if(_options.autoScroll) {
+				logEl.scrollTop = logEl.scrollHeight - logEl.clientHeight;
+			}
+		};
+	}
+
+	function clear() {
+		logEl.innerHTML = '';
+	}
+
+	function log() {
+		return genericLogger(_options.logColor).apply(null, arguments);
+	}
+
+	function info() {
+		return genericLogger(_options.infoColor).apply(null, arguments);
+	}
+
+	function warn() {
+		return genericLogger(_options.warnColor).apply(null, arguments);
+	}
+
+	function error() {
+		return genericLogger(_options.errorColor).apply(null, arguments);
+	}
+
+	function setOptions(options) {
+		for(var i in options)
+			if(options.hasOwnProperty(i) && _options.hasOwnProperty(i)) {
+				_options[i] = options[i];
+			}
+	}
+
+	function init(options) {
+		if (isInitialized) { return; }
+
+		isInitialized = true;
+
+		if(options) {
+			setOptions(options);
+		}
+
+		if (!_options.noUi) {
+			logEl = createPanel();
+			document.body.appendChild(logEl);
+		}
+
+		if (!_options.freeConsole) {
+			// Backup actual fns to keep it working together
+			_console.log = console.log;
+			_console.clear = console.clear;
+			_console.info = console.info;
+			_console.warn = console.warn;
+			_console.error = console.error;
+			console.log = originalFnCallDecorator(log, 'log');
+			console.clear = originalFnCallDecorator(clear, 'clear');
+			console.info = originalFnCallDecorator(info, 'info');
+			console.warn = originalFnCallDecorator(warn, 'warn');
+			console.error = originalFnCallDecorator(error, 'error');
+		}
+	}
+
+	function destroy() {
+		isInitialized = false;
+		console.log = _console.log;
+		console.clear = _console.clear;
+		console.info = _console.info;
+		console.warn = _console.warn;
+		console.error = _console.error;
+		logEl.remove();
+	}
+
+	/**
+	 * Checking if isInitialized is set
+	 */
+	function checkInitialized() {
+		if (!isInitialized) {
+			throw 'You need to call `screenLog.init()` first.';
+		}
+	}
+
+	/**
+	 * Decorator for checking if isInitialized is set
+	 * @param  {Function} fn Fn to decorate
+	 * @return {Function}      Decorated fn.
+	 */
+	function checkInitDecorator(fn) {
+		return function() {
+			checkInitialized();
+			return fn.apply(this, arguments);
+		};
+	}
+
+	/**
+	 * Decorator for calling the original console's fn at the end of
+	 * our overridden fn definitions.
+	 * @param  {Function} fn Fn to decorate
+	 * @param  {string} fn Name of original function
+	 * @return {Function}      Decorated fn.
+	 */
+	function originalFnCallDecorator(fn, fnName) {
+		return function() {
+			fn.apply(this, arguments);
+			if (typeof _console[fnName] === 'function') {
+				_console[fnName].apply(console, arguments);
+			}
+		};
+	}
+	window.addEventListener('error', function() {
+		genericLogger(_options.errorColor).call(null, arguments[0].error.stack);
+	});
+
+	// Public API
+	window.screenLog = {
+		init: init,
+		log: originalFnCallDecorator(checkInitDecorator(log), 'log'),
+		clear: originalFnCallDecorator(checkInitDecorator(clear), 'clear'),
+		info: originalFnCallDecorator(checkInitDecorator(clear), 'info'),
+		warn: originalFnCallDecorator(checkInitDecorator(warn), 'warn'),
+		error: originalFnCallDecorator(checkInitDecorator(error), 'error'),
+		destroy: checkInitDecorator(destroy)
+	};
+})();
+screenLog.init({
+	noUi: true,
+	proxyCallback: function () {
+		window.parent.onMessageFromConsole.apply(null, arguments);
+	}
+});

src/script.js

@@ -5,7 +5,7 @@ addLibraryModal, addLibraryModal, notificationsBtn, notificationsModal, notifica
 notificationsModal, notificationsBtn, codepenBtn, saveHtmlBtn, saveBtn, settingsBtn,
 onboardModal, settingsModal, notificationsBtn, onboardShowInTabOptionBtn, editorThemeLinkTag,
 onboardDontShowInTabOptionBtn, TextareaAutoComplete, savedItemCountEl, indentationSizeValueEl,
-runBtn, searchInput
+runBtn, searchInput, consoleEl, consoleLogEl
 */
 /* eslint-disable no-extra-semi */
 ;(function (alertsService) {
@@ -91,6 +91,7 @@ runBtn, searchInput
 		;
 
 	scope.cm = {};
+	scope.consoleCm;
 	scope.demoFrameDocument = frame.contentDocument || frame.contentWindow.document;
 
 	// Check all the code wrap if they are minimized or not
@@ -734,6 +735,9 @@ runBtn, searchInput
 			+ '<body>\n' + html + '\n'
 			+ externalJs + '\n';
 
+		contents += '<script src="'
+			+ chrome.extension.getURL('screenlog.js') + '"></script>';
+
 		if (js) {
 			contents += '<script>\n' + js + '\n//# sourceURL=userscript.js';
 		} else {
@@ -969,6 +973,17 @@ runBtn, searchInput
 	});
 	Inlet(scope.cm.js);
 
+	// Initialize codemirror in console
+	scope.consoleCm = CodeMirror(consoleLogEl, {
+		mode: 'javascript',
+		lineWrapping: true,
+		theme: 'monokai',
+		foldGutter: true,
+		readOnly: true,
+		viewportMargin: Infinity,
+		gutters: [ 'CodeMirror-foldgutter' ]
+	});
+
 	function openSettings() {
 		settingsModal.classList.toggle('is-modal-visible');
 
@@ -1252,6 +1267,7 @@ runBtn, searchInput
 			scope.cm[type].setOption('keyMap', $('[data-setting=keymap]:checked').value);
 			scope.cm[type].refresh();
 		});
+		scope.consoleCm.setOption('theme', $('[data-setting=editorTheme]').value);
 	};
 
 	scope.onNewBtnClick = function () {
@@ -1287,6 +1303,22 @@ runBtn, searchInput
 		trackEvent('ui', 'searchInputType');
 	};
 
+	scope.toggleConsole = function () {
+		consoleEl.classList.toggle('is-open');
+	};
+	scope.clearConsole = function () {
+		scope.consoleCm.setValue('');
+	};
+
+	window.onMessageFromConsole = function() {
+		[...arguments].forEach(function(arg) {
+			if (arg.indexOf && arg.indexOf('filesystem:chrome-extension') !== -1) {
+				arg = arg.replace(/filesystem:chrome-extension.*\.js:(\d+):(\d+)/g, 'script $1:$2');
+			}
+			scope.consoleCm.replaceRange('\n' + arg + ((arg + '').match(/\[object \w+\]/) ? JSON.stringify(arg) : '') + ' ', {line: Infinity});
+		});
+	}
+
 	function compileNodes() {
 
 		function attachListenerForEvent(eventName) {
@@ -1505,6 +1537,9 @@ runBtn, searchInput
 		});
 		window.addEventListener('dblclick', function(e) {
 			var target = e.target;
+			if (target.classList.contains('js-console__header')) {
+				scope.toggleConsole();
+			}
 			if (target.classList.contains('js-code-wrap__header')) {
 				var codeWrapParent = target.parentElement;
 				toggleCodeWrapCollapse(codeWrapParent);

src/style.css

@@ -107,6 +107,7 @@ select, input[type="text"], input[type="number"],  textarea {
 	top: 0; bottom: 0;
 	display: flex;
 	flex-direction: column;
+	overflow: hidden;
 	will-change: -webkit-filter;
 	transition: 0.10s ease 0.2s;
 }
@@ -201,9 +202,13 @@ select, input[type="text"], input[type="number"],  textarea {
 	opacity: 0;
 }
 .code-wrap__header-btn {
+	display: inline-block;
+	vertical-align: top;
+}
+.code-wrap__header-btn,
+.code-wrap__header-btn > svg  {
 	width: 18px;
 	height: 18px;
-	display: inline-block;
 }
 .code-wrap__collapse-btn:before {
 	content: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" style="width:18px;height:18px" viewBox="0 0 24 24"><path fill="rgba(255,255,255,0.2)" d="M19.5,3.09L15,7.59V4H13V11H20V9H16.41L20.91,4.5L19.5,3.09M4,13V15H7.59L3.09,19.5L4.5,20.91L9,16.41V20H11V13H4Z" /></svg>');
@@ -271,9 +276,10 @@ li.CodeMirror-hint-active {
 .main-header,
 .footer {
 	padding: 5px 10px;
-	background-color: rgba(0, 0, 0, 0.5);
+	background-color: rgb(18, 19, 27);
 	color: rgba(255, 255, 255, 0.45);
 	border-top: 1px solid rgba(255,255,255,0.14);
+	z-index: 1;
 	/*line-height: 20px;*/
 }
 .main-header {
@@ -810,3 +816,21 @@ li.CodeMirror-hint-active {
 .wobble {
 	animation-name: wobble;
 }
+.console {
+	background: var(--color-bg);
+	z-index: 1; /* bring above iframe */
+	position: absolute;
+	bottom: 0;
+	height: 30vh;
+	left: 0;
+	right: 0;
+	transform: translateY(calc(100% - 30px));
+	transition: transform 0.4s cubic-bezier(0.77,-0.1,0.13,0.9);
+}
+.console.is-open {
+	transform: translateY(0);
+}
+.console .Codemirror {
+	height: auto;
+	max-height: calc(100% - 50px);
+}