/** * 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(); } /** * Creates CodePen buttons in all code blocks (`pre`) that are HTML. */ CodeBlockCodePen.prototype.init = function() { 'use strict'; // Also insert the MDL Library. var mdlLibs = [ '', '', '', '', '', // TODO: Remove below before launch. For testing only. '', '', '' ]; 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;
    }

    // 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.substr(endIndex + 8);
    }

    // Create the CodePen Form and add it to the 
 block.
    var form = document.createElement('form');
    form.classList.add('codepen-button');
    form.setAttribute('action', 'http://codepen.io/pen/define');
    form.setAttribute('method', 'POST');
    form.addEventListener('click', this.clickHandler(form));
    var input = document.createElement('input');
    input.setAttribute('type', 'hidden');
    input.setAttribute('name', 'data');
    input.setAttribute('value', JSON.stringify(
      {html: '\n  \n    ' +
          mdlLibs.join('\n    ') +
          '\n  \n  \n    ' +
          code.split('\n').join('\n    ').trim() +
          '\n  \n',
      css: styleLines.join('\n')}));
    form.appendChild(input);
    pre.appendChild(form);
  }
};

/**
 * Click handler for CodePEn buttons. Simply submits the form to CodePen.
 */
CodeBlockCodePen.prototype.clickHandler = function(form) {
  'use strict';

  return function() {
    form.submit();
  };
};

window.addEventListener('load', function() {
  'use strict';

  new CodeBlockCodePen();
});