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File: Mode.js
/**
 * Mode.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
 */

/**
 * Mode switcher logic.
 *
 * @private
 * @class tinymce.Mode
 */
define(
  'tinymce.core.Mode',
  [
  ],
  function () {
    function setEditorCommandState(editor, cmd, state) {
      try {
        editor.getDoc().execCommand(cmd, false, state);
      } catch (ex) {
        // Ignore
      }
    }

    function clickBlocker(editor) {
      var target, handler;

      target = editor.getBody();

      handler = function (e) {
        if (editor.dom.getParents(e.target, 'a').length > 0) {
          e.preventDefault();
        }
      };

      editor.dom.bind(target, 'click', handler);

      return {
        unbind: function () {
          editor.dom.unbind(target, 'click', handler);
        }
      };
    }

    function toggleReadOnly(editor, state) {
      if (editor._clickBlocker) {
        editor._clickBlocker.unbind();
        editor._clickBlocker = null;
      }

      if (state) {
        editor._clickBlocker = clickBlocker(editor);
        editor.selection.controlSelection.hideResizeRect();
        editor.readonly = true;
        editor.getBody().contentEditable = false;
      } else {
        editor.readonly = false;
        editor.getBody().contentEditable = true;
        setEditorCommandState(editor, "StyleWithCSS", false);
        setEditorCommandState(editor, "enableInlineTableEditing", false);
        setEditorCommandState(editor, "enableObjectResizing", false);
        editor.focus();
        editor.nodeChanged();
      }
    }

    function setMode(editor, mode) {
      var currentMode = editor.readonly ? 'readonly' : 'design';

      if (mode == currentMode) {
        return;
      }

      if (editor.initialized) {
        toggleReadOnly(editor, mode == 'readonly');
      } else {
        editor.on('init', function () {
          toggleReadOnly(editor, mode == 'readonly');
        });
      }

      // Event is NOT preventable
      editor.fire('SwitchMode', { mode: mode });
    }

    return {
      setMode: setMode
    };
  }
);