/**
 * Copyright (c) Tiny Technologies, Inc. All rights reserved.
 * Licensed under the LGPL or a commercial license.
 * For LGPL see License.txt in the project root for license information.
 * For commercial licenses see https://www.tiny.cloud/
 *
 * Version: 5.5.1 (2020-10-01)
 */
(function () {
    'use strict';

    var global = tinymce.util.Tools.resolve('tinymce.PluginManager');

    var global$1 = tinymce.util.Tools.resolve('tinymce.util.Tools');

    var setDir = function (editor, dir) {
      var dom = editor.dom;
      var curDir;
      var blocks = editor.selection.getSelectedBlocks();
      if (blocks.length) {
        curDir = dom.getAttrib(blocks[0], 'dir');
        global$1.each(blocks, function (block) {
          if (!dom.getParent(block.parentNode, '*[dir="' + dir + '"]', dom.getRoot())) {
            dom.setAttrib(block, 'dir', curDir !== dir ? dir : null);
          }
        });
        editor.nodeChanged();
      }
    };

    var register = function (editor) {
      editor.addCommand('mceDirectionLTR', function () {
        setDir(editor, 'ltr');
      });
      editor.addCommand('mceDirectionRTL', function () {
        setDir(editor, 'rtl');
      });
    };

    var noop = function () {
    };
    var compose1 = function (fbc, fab) {
      return function (a) {
        return fbc(fab(a));
      };
    };
    var constant = function (value) {
      return function () {
        return value;
      };
    };
    var never = constant(false);
    var always = constant(true);

    var none = function () {
      return NONE;
    };
    var NONE = function () {
      var eq = function (o) {
        return o.isNone();
      };
      var call = function (thunk) {
        return thunk();
      };
      var id = function (n) {
        return n;
      };
      var me = {
        fold: function (n, _s) {
          return n();
        },
        is: never,
        isSome: never,
        isNone: always,
        getOr: id,
        getOrThunk: call,
        getOrDie: function (msg) {
          throw new Error(msg || 'error: getOrDie called on none.');
        },
        getOrNull: constant(null),
        getOrUndefined: constant(undefined),
        or: id,
        orThunk: call,
        map: none,
        each: noop,
        bind: none,
        exists: never,
        forall: always,
        filter: none,
        equals: eq,
        equals_: eq,
        toArray: function () {
          return [];
        },
        toString: constant('none()')
      };
      return me;
    }();
    var some = function (a) {
      var constant_a = constant(a);
      var self = function () {
        return me;
      };
      var bind = function (f) {
        return f(a);
      };
      var me = {
        fold: function (n, s) {
          return s(a);
        },
        is: function (v) {
          return a === v;
        },
        isSome: always,
        isNone: never,
        getOr: constant_a,
        getOrThunk: constant_a,
        getOrDie: constant_a,
        getOrNull: constant_a,
        getOrUndefined: constant_a,
        or: self,
        orThunk: self,
        map: function (f) {
          return some(f(a));
        },
        each: function (f) {
          f(a);
        },
        bind: bind,
        exists: bind,
        forall: bind,
        filter: function (f) {
          return f(a) ? me : NONE;
        },
        toArray: function () {
          return [a];
        },
        toString: function () {
          return 'some(' + a + ')';
        },
        equals: function (o) {
          return o.is(a);
        },
        equals_: function (o, elementEq) {
          return o.fold(never, function (b) {
            return elementEq(a, b);
          });
        }
      };
      return me;
    };
    var from = function (value) {
      return value === null || value === undefined ? NONE : some(value);
    };
    var Optional = {
      some: some,
      none: none,
      from: from
    };

    var isSimpleType = function (type) {
      return function (value) {
        return typeof value === type;
      };
    };
    var isFunction = isSimpleType('function');

    var isSupported = function (dom) {
      return dom.style !== undefined && isFunction(dom.style.getPropertyValue);
    };

    var fromHtml = function (html, scope) {
      var doc = scope || document;
      var div = doc.createElement('div');
      div.innerHTML = html;
      if (!div.hasChildNodes() || div.childNodes.length > 1) {
        console.error('HTML does not have a single root node', html);
        throw new Error('HTML must have a single root node');
      }
      return fromDom(div.childNodes[0]);
    };
    var fromTag = function (tag, scope) {
      var doc = scope || document;
      var node = doc.createElement(tag);
      return fromDom(node);
    };
    var fromText = function (text, scope) {
      var doc = scope || document;
      var node = doc.createTextNode(text);
      return fromDom(node);
    };
    var fromDom = function (node) {
      if (node === null || node === undefined) {
        throw new Error('Node cannot be null or undefined');
      }
      return { dom: node };
    };
    var fromPoint = function (docElm, x, y) {
      return Optional.from(docElm.dom.elementFromPoint(x, y)).map(fromDom);
    };
    var SugarElement = {
      fromHtml: fromHtml,
      fromTag: fromTag,
      fromText: fromText,
      fromDom: fromDom,
      fromPoint: fromPoint
    };

    var Global = typeof window !== 'undefined' ? window : Function('return this;')();

    var DOCUMENT = 9;
    var DOCUMENT_FRAGMENT = 11;
    var TEXT = 3;

    var type = function (element) {
      return element.dom.nodeType;
    };
    var isType = function (t) {
      return function (element) {
        return type(element) === t;
      };
    };
    var isText = isType(TEXT);
    var isDocument = isType(DOCUMENT);
    var isDocumentFragment = isType(DOCUMENT_FRAGMENT);

    var owner = function (element) {
      return SugarElement.fromDom(element.dom.ownerDocument);
    };
    var documentOrOwner = function (dos) {
      return isDocument(dos) ? dos : owner(dos);
    };

    var isShadowRoot = function (dos) {
      return isDocumentFragment(dos);
    };
    var supported = isFunction(Element.prototype.attachShadow) && isFunction(Node.prototype.getRootNode);
    var getRootNode = supported ? function (e) {
      return SugarElement.fromDom(e.dom.getRootNode());
    } : documentOrOwner;
    var getShadowRoot = function (e) {
      var r = getRootNode(e);
      return isShadowRoot(r) ? Optional.some(r) : Optional.none();
    };
    var getShadowHost = function (e) {
      return SugarElement.fromDom(e.dom.host);
    };

    var inBody = function (element) {
      var dom = isText(element) ? element.dom.parentNode : element.dom;
      if (dom === undefined || dom === null || dom.ownerDocument === null) {
        return false;
      }
      var doc = dom.ownerDocument;
      return getShadowRoot(SugarElement.fromDom(dom)).fold(function () {
        return doc.body.contains(dom);
      }, compose1(inBody, getShadowHost));
    };

    var get = function (element, property) {
      var dom = element.dom;
      var styles = window.getComputedStyle(dom);
      var r = styles.getPropertyValue(property);
      return r === '' && !inBody(element) ? getUnsafeProperty(dom, property) : r;
    };
    var getUnsafeProperty = function (dom, property) {
      return isSupported(dom) ? dom.style.getPropertyValue(property) : '';
    };

    var getDirection = function (element) {
      return get(element, 'direction') === 'rtl' ? 'rtl' : 'ltr';
    };

    var getNodeChangeHandler = function (editor, dir) {
      return function (api) {
        var nodeChangeHandler = function (e) {
          var element = SugarElement.fromDom(e.element);
          api.setActive(getDirection(element) === dir);
        };
        editor.on('NodeChange', nodeChangeHandler);
        return function () {
          return editor.off('NodeChange', nodeChangeHandler);
        };
      };
    };
    var register$1 = function (editor) {
      editor.ui.registry.addToggleButton('ltr', {
        tooltip: 'Left to right',
        icon: 'ltr',
        onAction: function () {
          return editor.execCommand('mceDirectionLTR');
        },
        onSetup: getNodeChangeHandler(editor, 'ltr')
      });
      editor.ui.registry.addToggleButton('rtl', {
        tooltip: 'Right to left',
        icon: 'rtl',
        onAction: function () {
          return editor.execCommand('mceDirectionRTL');
        },
        onSetup: getNodeChangeHandler(editor, 'rtl')
      });
    };

    function Plugin () {
      global.add('directionality', function (editor) {
        register(editor);
        register$1(editor);
      });
    }

    Plugin();

}());