/**
* Copyright 2015 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
function CodeBlockCodePen() {
'use strict';
this.htmlCodeBlocks = document.getElementsByClassName('language-markup');
this.init();
}
// Also insert the MDL Library.
CodeBlockCodePen.prototype.MDLIBS = [
// TODO: Remove below before launch. For testing only.
'',
'',
'',
'',
'',
'',
'',
''
];
/**
* Creates CodePen buttons in all code blocks (`pre`) that are HTML.
*/
CodeBlockCodePen.prototype.init = function() {
'use strict';
for (var i = 0, len = this.htmlCodeBlocks.length; i < len; i++) {
var pre = this.htmlCodeBlocks[i];
// If pre is a node we check if it's enclosed in a
tag and
// process that instead.
if (pre.tagName.toLowerCase() !== 'pre') {
pre = pre.parentNode;
}
// Verify there is not already a codePen Button and that we are in a
.
if (pre.getElementsByTagName('form').length > 0 ||
pre.tagName.toLowerCase() !== 'pre') {
continue;
}
// Create the CodePen Form and add it to the
block.
var form = document.createElement('form');
form.classList.add('codepen-button');
form.setAttribute('action', 'https://codepen.io/pen/define');
form.setAttribute('method', 'POST');
form.setAttribute('target', '_blank');
form.addEventListener('click', this.clickHandler(form, pre));
pre.appendChild(form);
}
};
/**
* Click handler for CodePEn buttons. Simply submits the form to CodePen.
*/
CodeBlockCodePen.prototype.clickHandler = function(form, pre) {
'use strict';
return function() {
// Modify relative URLs to make them absolute.
var code = pre.textContent.replace('../assets/demos/',
window.location.origin + '/assets/demos/');
// Extract ');
var styleBlock = code.substring(startIndex + 7, endIndex).trim();
var styleBlockLines = styleBlock.split('\n').map(
function(elem) {
return elem.trim();
});
styleLines = styleLines.concat(styleBlockLines);
code = code.substring(0, startIndex).trim() + '\n' +
code.substr(endIndex + 8).trim();
}
// Remove children from previous clicks.
while (form.firstChild) {
form.removeChild(form.firstChild);
}
var input = document.createElement('input');
input.setAttribute('type', 'hidden');
input.setAttribute('name', 'data');
input.setAttribute('value', JSON.stringify(
{html: '\n \n ' +
this.MDLIBS.join('\n ') +
'\n \n \n ' +
code.split('\n').join('\n ').trim() +
'\n \n',
css: styleLines.join('\n').trim()}));
form.appendChild(input);
form.submit();
}.bind(this);
};
window.addEventListener('load', function() {
'use strict';
new CodeBlockCodePen();
});