120 lines
4.3 KiB
Plaintext
120 lines
4.3 KiB
Plaintext
function updateResults(elem) {
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if ($(elem).length ===0){return false;}
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var resultsContainer = $(elem).find('[data-id="results"]')[0];
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var codeHtml = $(elem).find('.code-html')[0].value.trim();
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var codeCss = $(elem).find('.code-css')[0].value.trim();
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var codeJs = $(elem).find('.code-js')[0].value.trim();
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resultsContainer.innerHTML = "";
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var iDoc = document.createElement('html');
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var iHead = document.createElement('head');
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var iBody = document.createElement('body');
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var codeFrame = document.createElement('iframe');
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codeFrame.setAttribute("title", "live-code-results-" + resultsContainer.getAttribute("data-qid"));
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codeFrame.setAttribute("width", "100%");
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codeFrame.setAttribute("height", "100%");
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resultsContainer.appendChild(codeFrame);
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var jqueryNode = document.createElement("script");
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jqueryNode.setAttribute("type", "text/javascript");
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jqueryNode.setAttribute("src", "<%= "//#{ENV['full_app_url']}#{javascript_path "jquery"}" %>");
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iHead.appendChild(jqueryNode);
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var codeStyle = document.createElement("style");
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codeStyle.setAttribute("type", "text/css");
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var rulesNode = document.createTextNode(codeCss);
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codeStyle.appendChild(rulesNode);
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iHead.appendChild(codeStyle);
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iDoc.setAttribute('lang', 'en');
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iDoc.appendChild(iHead);
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iBody.innerHTML = codeHtml;
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iDoc.appendChild(iBody);
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var codeScript = document.createElement("script");
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codeScript.setAttribute("type", "text/javascript");
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var scriptNode = document.createTextNode("setTimeout(function(){ " + codeJs + "}, 800);");
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codeScript.appendChild(scriptNode);
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iDoc.appendChild(codeScript);
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codeFrame.contentWindow.document.open();
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codeFrame.contentWindow.document.appendChild(iDoc);
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codeFrame.contentWindow.document.close();
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}
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function indentSelection(e){
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if(e.keyCode === 9){
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e.preventDefault();
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var indent = " ";
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var cursor = e.target.selectionStart;
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var val = e.target.value;
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var valStart = val.substring(0, e.target.selectionStart);
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var valEnd = val.substring(e.target.selectionEnd, val.length);
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var selected = val.substring(e.target.selectionStart, e.target.selectionEnd);
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var resetCursor = function(start, end){
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e.target.selectionStart = start;
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e.target.selectionEnd = end;
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};
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var indented;
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if(e.shiftKey){ //de-indent
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if(selected.length > 0 && (/\n/.test(selected))){ //multi line
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indented = selected.split(/\n/).map(function(line){
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if(line.length > 0 && line.substring(0, indent.length) === indent){
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line = line.substring(indent.length, line.length);
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}
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return line;
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}).join("\n");
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e.target.value = valStart + indented + val.substring(e.target.selectionEnd, val.length);
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resetCursor(cursor, cursor + indented.length);
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} else {
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if(valStart.substring(valStart.length - indent.length) === indent){
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e.target.value = valStart.substring(0, valStart.length - indent.length) + valEnd;
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resetCursor(cursor, cursor - indent.length);
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} else if(valEnd.substring(0, indent.length) === indent) {
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e.target.value = valStart + valEnd.substring(indent.length, valEnd.length);
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resetCursor(cursor, cursor);
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}
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}
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} else { //indent
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if(selected.length > 0 && (/\n/.test(selected))){ //multi line
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indented = selected.split(/\n/).map(function(line){
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if(line.length > 0){ line = indent + line; }
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return line;
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}).join("\n");
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e.target.value = valStart + indented + val.substring(e.target.selectionEnd, val.length);
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resetCursor(cursor, cursor + indented.length);
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} else {
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e.target.value = valStart + indent + selected + valEnd;
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resetCursor(cursor + indent.length, cursor + indent.length);
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}
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}
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}
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}
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var timer = 0;
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$(function(){
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// wait a half second before updating results
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// restart the timer if they resume typing
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$('html').on('keyup', '.code-input textarea', function(){
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var elem = $(this).closest("[data-id=live-coder-answer]");
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if (timer) { clearTimeout(timer); }
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timer = setTimeout(updateResults(elem), 500);
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});
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$("[data-id=live-coder-answer]").each(function(){
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updateResults(this);
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});
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$("html").on('keydown', "textarea[data-id^=code-]", function(e){
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indentSelection(e);
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});
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$(".code-input textarea").linedtextarea();
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});
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