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File: Plugin.js
/**
 * Plugin.js
 *
 * Released under LGPL License.
 * Copyright (c) 1999-2017 Ephox Corp. All rights reserved
 *
 * License: http://www.tinymce.com/license
 * Contributing: http://www.tinymce.com/contributing
 */

/**
 * This class contains all core logic for the codesample plugin.
 *
 * @class tinymce.codesample.Plugin
 * @private
 */
define(
  'tinymce.plugins.codesample.Plugin',
  [
    'tinymce.core.Env',
    'tinymce.core.PluginManager',
    'tinymce.plugins.codesample.core.Prism',
    'tinymce.plugins.codesample.ui.Dialog',
    'tinymce.plugins.codesample.util.Utils'
  ],
  function (Env, PluginManager, Prism, Dialog, Utils) {
    var addedInlineCss, trimArg = Utils.trimArg;

    PluginManager.add('codesample', function (editor, pluginUrl) {
      var $ = editor.$, addedCss;

      if (!Env.ceFalse) {
        return;
      }

      // Todo: use a proper css loader here
      function loadCss() {
        var linkElm, contentCss = editor.settings.codesample_content_css;

        if (editor.inline && addedInlineCss) {
          return;
        }

        if (!editor.inline && addedCss) {
          return;
        }

        if (editor.inline) {
          addedInlineCss = true;
        } else {
          addedCss = true;
        }

        if (contentCss !== false) {
          linkElm = editor.dom.create('link', {
            rel: 'stylesheet',
            href: contentCss ? contentCss : pluginUrl + '/css/prism.css'
          });

          editor.getDoc().getElementsByTagName('head')[0].appendChild(linkElm);
        }
      }

      editor.on('PreProcess', function (e) {
        $('pre[contenteditable=false]', e.node).
          filter(trimArg(Utils.isCodeSample)).
          each(function (idx, elm) {
            var $elm = $(elm), code = elm.textContent;

            $elm.attr('class', $.trim($elm.attr('class')));
            $elm.removeAttr('contentEditable');

            $elm.empty().append($('<code></code>').each(function () {
              // Needs to be textContent since innerText produces BR:s
              this.textContent = code;
            }));
          });
      });

      editor.on('SetContent', function () {
        var unprocessedCodeSamples = $('pre').filter(trimArg(Utils.isCodeSample)).filter(function (idx, elm) {
          return elm.contentEditable !== "false";
        });

        if (unprocessedCodeSamples.length) {
          editor.undoManager.transact(function () {
            unprocessedCodeSamples.each(function (idx, elm) {
              $(elm).find('br').each(function (idx, elm) {
                elm.parentNode.replaceChild(editor.getDoc().createTextNode('\n'), elm);
              });

              elm.contentEditable = false;
              elm.innerHTML = editor.dom.encode(elm.textContent);
              Prism.highlightElement(elm);
              elm.className = $.trim(elm.className);
            });
          });
        }
      });

      editor.addCommand('codesample', function () {
        var node = editor.selection.getNode();
        if (editor.selection.isCollapsed() || Utils.isCodeSample(node)) {
          Dialog.open(editor);
        } else {
          editor.formatter.toggle('code');
        }
      });

      editor.addButton('codesample', {
        cmd: 'codesample',
        title: 'Insert/Edit code sample'
      });

      editor.on('init', loadCss);
    });

    return function () { };
  }
);