138 lines
4.6 KiB
JavaScript
138 lines
4.6 KiB
JavaScript
/**
|
|
* 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.
|
|
'<!-- For testing. TODO: Remove before launch -->',
|
|
'<link rel="stylesheet" href="http://mdl-staging.storage.googleapis.com/material.min.css">',
|
|
'<script src="http://mdl-staging.storage.googleapis.com/material.min.js"></script>',
|
|
'<!-- Material Design Lite -->',
|
|
'<script src="$$hosted_libs_prefix$$/$$version$$/material.min.js"></script>',
|
|
'<link rel="stylesheet" href="$$hosted_libs_prefix$$/$$version$$/material.indigo-pink.min.css">',
|
|
'<!-- Material Design icon font -->',
|
|
'<link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">'
|
|
];
|
|
|
|
/**
|
|
* 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 <code> node we check if it's enclosed in a <pre> 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 <pre>.
|
|
if (pre.getElementsByTagName('form').length > 0 ||
|
|
pre.tagName.toLowerCase() !== 'pre') {
|
|
continue;
|
|
}
|
|
|
|
// Create the CodePen Form and add it to the <pre> 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 <style> blocks from the source code.
|
|
var styleLines = [];
|
|
|
|
while (code.indexOf('<style>') !== -1) {
|
|
var styleStartIndex = code.indexOf('<style>');
|
|
var styleEndIndex = code.indexOf('</style>');
|
|
var styleBlock = code.substring(styleStartIndex + 7, styleEndIndex).trim();
|
|
var styleBlockLines = styleBlock.split('\n').map(
|
|
function(elem) {
|
|
return elem.trim();
|
|
});
|
|
styleLines = styleLines.concat(styleBlockLines);
|
|
code = code.substring(0, styleStartIndex).trim() + '\n' +
|
|
code.substr(styleEndIndex + 8).trim();
|
|
}
|
|
|
|
// Extract <script> blocks from the source code.
|
|
var scriptLines = [];
|
|
|
|
while (code.indexOf('<script>') !== -1) {
|
|
var scriptStartIndex = code.indexOf('<script>');
|
|
var scriptEndIndex = code.indexOf('</script>');
|
|
var scriptBlockLines = code.substring(scriptStartIndex + 8,
|
|
scriptEndIndex).trim().split('\n');
|
|
scriptLines = scriptLines.concat(scriptBlockLines);
|
|
code = code.substring(0, scriptStartIndex).trim() + '\n' +
|
|
code.substr(scriptEndIndex + 9).trim();
|
|
}
|
|
|
|
// Remove <input> 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: '<html>\n <head>\n ' +
|
|
this.MDLIBS.join('\n ') +
|
|
'\n </head>\n <body>\n ' +
|
|
code.split('\n').join('\n ').trim() +
|
|
'\n </body>\n</html>',
|
|
css: styleLines.join('\n').trim(),
|
|
js: scriptLines.join('\n').trim()}));
|
|
form.appendChild(input);
|
|
|
|
form.submit();
|
|
}.bind(this);
|
|
};
|
|
|
|
window.addEventListener('load', function() {
|
|
'use strict';
|
|
|
|
new CodeBlockCodePen();
|
|
});
|