/**
 * Formatter.js
 *
 * Released under LGPL License.
 * Copyright (c) 1999-2015 Ephox Corp. All rights reserved
 *
 * License: http://www.tinymce.com/license
 * Contributing: http://www.tinymce.com/contributing
 */

/**
 * Text formatter engine class. This class is used to apply formats like bold, italic, font size
 * etc to the current selection or specific nodes. This engine was built to replace the browser's
 * default formatting logic for execCommand due to its inconsistent and buggy behavior.
 *
 * @class tinymce.Formatter
 * @example
 *  tinymce.activeEditor.formatter.register('mycustomformat', {
 *    inline: 'span',
 *    styles: {color: '#ff0000'}
 *  });
 *
 *  tinymce.activeEditor.formatter.apply('mycustomformat');
 */
define("tinymce/Formatter", [
	"tinymce/dom/TreeWalker",
	"tinymce/dom/RangeUtils",
	"tinymce/dom/BookmarkManager",
	"tinymce/dom/ElementUtils",
	"tinymce/util/Tools",
	"tinymce/fmt/Preview"
], function(TreeWalker, RangeUtils, BookmarkManager, ElementUtils, Tools, Preview) {
	/**
	 * Constructs a new formatter instance.
	 *
	 * @constructor Formatter
	 * @param {tinymce.Editor} ed Editor instance to construct the formatter engine to.
	 */
	return function(ed) {
		var formats = {},
			dom = ed.dom,
			selection = ed.selection,
			rangeUtils = new RangeUtils(dom),
			isValid = ed.schema.isValidChild,
			isBlock = dom.isBlock,
			forcedRootBlock = ed.settings.forced_root_block,
			nodeIndex = dom.nodeIndex,
			INVISIBLE_CHAR = '\uFEFF',
			MCE_ATTR_RE = /^(src|href|style)$/,
			FALSE = false,
			TRUE = true,
			formatChangeData,
			undef,
			getContentEditable = dom.getContentEditable,
			disableCaretContainer,
			markCaretContainersBogus,
			isBookmarkNode = BookmarkManager.isBookmarkNode;

		var each = Tools.each,
			grep = Tools.grep,
			walk = Tools.walk,
			extend = Tools.extend;

		function isTextBlock(name) {
			if (name.nodeType) {
				name = name.nodeName;
			}

			return !!ed.schema.getTextBlockElements()[name.toLowerCase()];
		}

		function isTableCell(node) {
			return /^(TH|TD)$/.test(node.nodeName);
		}

		function isInlineBlock(node) {
			return node && /^(IMG)$/.test(node.nodeName);
		}

		function getParents(node, selector) {
			return dom.getParents(node, selector, dom.getRoot());
		}

		function isCaretNode(node) {
			return node.nodeType === 1 && node.id === '_mce_caret';
		}

		function defaultFormats() {
			register({
				valigntop: [
					{selector: 'td,th', styles: {'verticalAlign': 'top'}}
				],

				valignmiddle: [
					{selector: 'td,th', styles: {'verticalAlign': 'middle'}}
				],

				valignbottom: [
					{selector: 'td,th', styles: {'verticalAlign': 'bottom'}}
				],

				alignleft: [
					{selector: 'figure.image', collapsed: false, classes: 'align-left', ceFalseOverride: true},
					{selector: 'figure,p,h1,h2,h3,h4,h5,h6,td,th,tr,div,ul,ol,li', styles: {textAlign: 'left'}, defaultBlock: 'div'},
					{selector: 'img,table', collapsed: false, styles: {'float': 'left'}}
				],

				aligncenter: [
					{selector: 'figure,p,h1,h2,h3,h4,h5,h6,td,th,tr,div,ul,ol,li', styles: {textAlign: 'center'}, defaultBlock: 'div'},
					{selector: 'img', collapsed: false, styles: {display: 'block', marginLeft: 'auto', marginRight: 'auto'}},
					{selector: 'table', collapsed: false, styles: {marginLeft: 'auto', marginRight: 'auto'}}
				],

				alignright: [
					{selector: 'figure.image', collapsed: false, classes: 'align-right', ceFalseOverride: true},
					{selector: 'figure,p,h1,h2,h3,h4,h5,h6,td,th,tr,div,ul,ol,li', styles: {textAlign: 'right'}, defaultBlock: 'div'},
					{selector: 'img,table', collapsed: false, styles: {'float': 'right'}}
				],

				alignjustify: [
					{selector: 'figure,p,h1,h2,h3,h4,h5,h6,td,th,tr,div,ul,ol,li', styles: {textAlign: 'justify'}, defaultBlock: 'div'}
				],

				bold: [
					{inline: 'strong', remove: 'all'},
					{inline: 'span', styles: {fontWeight: 'bold'}},
					{inline: 'b', remove: 'all'}
				],

				italic: [
					{inline: 'em', remove: 'all'},
					{inline: 'span', styles: {fontStyle: 'italic'}},
					{inline: 'i', remove: 'all'}
				],

				underline: [
					{inline: 'span', styles: {textDecoration: 'underline'}, exact: true},
					{inline: 'u', remove: 'all'}
				],

				strikethrough: [
					{inline: 'span', styles: {textDecoration: 'line-through'}, exact: true},
					{inline: 'strike', remove: 'all'}
				],

				forecolor: {inline: 'span', styles: {color: '%value'}, links: true, remove_similar: true},
				hilitecolor: {inline: 'span', styles: {backgroundColor: '%value'}, links: true, remove_similar: true},
				fontname: {inline: 'span', styles: {fontFamily: '%value'}},
				fontsize: {inline: 'span', styles: {fontSize: '%value'}},
				fontsize_class: {inline: 'span', attributes: {'class': '%value'}},
				blockquote: {block: 'blockquote', wrapper: 1, remove: 'all'},
				subscript: {inline: 'sub'},
				superscript: {inline: 'sup'},
				code: {inline: 'code'},

				link: {inline: 'a', selector: 'a', remove: 'all', split: true, deep: true,
					onmatch: function() {
						return true;
					},

					onformat: function(elm, fmt, vars) {
						each(vars, function(value, key) {
							dom.setAttrib(elm, key, value);
						});
					}
				},

				removeformat: [
					{
						selector: 'b,strong,em,i,font,u,strike,sub,sup,dfn,code,samp,kbd,var,cite,mark,q,del,ins',
						remove: 'all',
						split: true,
						expand: false,
						block_expand: true,
						deep: true
					},
					{selector: 'span', attributes: ['style', 'class'], remove: 'empty', split: true, expand: false, deep: true},
					{selector: '*', attributes: ['style', 'class'], split: false, expand: false, deep: true}
				]
			});

			// Register default block formats
			each('p h1 h2 h3 h4 h5 h6 div address pre div dt dd samp'.split(/\s/), function(name) {
				register(name, {block: name, remove: 'all'});
			});

			// Register user defined formats
			register(ed.settings.formats);
		}

		function addKeyboardShortcuts() {
			// Add some inline shortcuts
			ed.addShortcut('meta+b', 'bold_desc', 'Bold');
			ed.addShortcut('meta+i', 'italic_desc', 'Italic');
			ed.addShortcut('meta+u', 'underline_desc', 'Underline');

			// BlockFormat shortcuts keys
			for (var i = 1; i <= 6; i++) {
				ed.addShortcut('access+' + i, '', ['FormatBlock', false, 'h' + i]);
			}

			ed.addShortcut('access+7', '', ['FormatBlock', false, 'p']);
			ed.addShortcut('access+8', '', ['FormatBlock', false, 'div']);
			ed.addShortcut('access+9', '', ['FormatBlock', false, 'address']);
		}

		// Public functions

		/**
		 * Returns the format by name or all formats if no name is specified.
		 *
		 * @method get
		 * @param {String} name Optional name to retrieve by.
		 * @return {Array/Object} Array/Object with all registered formats or a specific format.
		 */
		function get(name) {
			return name ? formats[name] : formats;
		}

		/**
		 * Registers a specific format by name.
		 *
		 * @method register
		 * @param {Object/String} name Name of the format for example "bold".
		 * @param {Object/Array} format Optional format object or array of format variants
		 * can only be omitted if the first arg is an object.
		 */
		function register(name, format) {
			if (name) {
				if (typeof name !== 'string') {
					each(name, function(format, name) {
						register(name, format);
					});
				} else {
					// Force format into array and add it to internal collection
					format = format.length ? format : [format];

					each(format, function(format) {
						// Set deep to false by default on selector formats this to avoid removing
						// alignment on images inside paragraphs when alignment is changed on paragraphs
						if (format.deep === undef) {
							format.deep = !format.selector;
						}

						// Default to true
						if (format.split === undef) {
							format.split = !format.selector || format.inline;
						}

						// Default to true
						if (format.remove === undef && format.selector && !format.inline) {
							format.remove = 'none';
						}

						// Mark format as a mixed format inline + block level
						if (format.selector && format.inline) {
							format.mixed = true;
							format.block_expand = true;
						}

						// Split classes if needed
						if (typeof format.classes === 'string') {
							format.classes = format.classes.split(/\s+/);
						}
					});

					formats[name] = format;
				}
			}
		}

		/**
		 * Unregister a specific format by name.
		 *
		 * @method unregister
		 * @param {String} name Name of the format for example "bold".
		 */
		function unregister(name) {
			if (name && formats[name]) {
				delete formats[name];
			}

			return formats;
		}

		function getTextDecoration(node) {
			var decoration;

			ed.dom.getParent(node, function(n) {
				decoration = ed.dom.getStyle(n, 'text-decoration');
				return decoration && decoration !== 'none';
			});

			return decoration;
		}

		function processUnderlineAndColor(node) {
			var textDecoration;
			if (node.nodeType === 1 && node.parentNode && node.parentNode.nodeType === 1) {
				textDecoration = getTextDecoration(node.parentNode);
				if (ed.dom.getStyle(node, 'color') && textDecoration) {
					ed.dom.setStyle(node, 'text-decoration', textDecoration);
				} else if (ed.dom.getStyle(node, 'text-decoration') === textDecoration) {
					ed.dom.setStyle(node, 'text-decoration', null);
				}
			}
		}

		/**
		 * Applies the specified format to the current selection or specified node.
		 *
		 * @method apply
		 * @param {String} name Name of format to apply.
		 * @param {Object} vars Optional list of variables to replace within format before applying it.
		 * @param {Node} node Optional node to apply the format to defaults to current selection.
		 */
		function apply(name, vars, node) {
			var formatList = get(name), format = formatList[0], bookmark, rng, isCollapsed = !node && selection.isCollapsed();

			function setElementFormat(elm, fmt) {
				fmt = fmt || format;

				if (elm) {
					if (fmt.onformat) {
						fmt.onformat(elm, fmt, vars, node);
					}

					each(fmt.styles, function(value, name) {
						dom.setStyle(elm, name, replaceVars(value, vars));
					});

					// Needed for the WebKit span spam bug
					// TODO: Remove this once WebKit/Blink fixes this
					if (fmt.styles) {
						var styleVal = dom.getAttrib(elm, 'style');

						if (styleVal) {
							elm.setAttribute('data-mce-style', styleVal);
						}
					}

					each(fmt.attributes, function(value, name) {
						dom.setAttrib(elm, name, replaceVars(value, vars));
					});

					each(fmt.classes, function(value) {
						value = replaceVars(value, vars);

						if (!dom.hasClass(elm, value)) {
							dom.addClass(elm, value);
						}
					});
				}
			}

			function adjustSelectionToVisibleSelection() {
				function findSelectionEnd(start, end) {
					var walker = new TreeWalker(end);
					for (node = walker.current(); node; node = walker.prev()) {
						if (node.childNodes.length > 1 || node == start || node.tagName == 'BR') {
							return node;
						}
					}
				}

				// Adjust selection so that a end container with a end offset of zero is not included in the selection
				// as this isn't visible to the user.
				var rng = ed.selection.getRng();
				var start = rng.startContainer;
				var end = rng.endContainer;

				if (start != end && rng.endOffset === 0) {
					var newEnd = findSelectionEnd(start, end);
					var endOffset = newEnd.nodeType == 3 ? newEnd.length : newEnd.childNodes.length;

					rng.setEnd(newEnd, endOffset);
				}

				return rng;
			}

			function applyRngStyle(rng, bookmark, node_specific) {
				var newWrappers = [], wrapName, wrapElm, contentEditable = true;

				// Setup wrapper element
				wrapName = format.inline || format.block;
				wrapElm = dom.create(wrapName);
				setElementFormat(wrapElm);

				rangeUtils.walk(rng, function(nodes) {
					var currentWrapElm;

					/**
					 * Process a list of nodes wrap them.
					 */
					function process(node) {
						var nodeName, parentName, found, hasContentEditableState, lastContentEditable;

						lastContentEditable = contentEditable;
						nodeName = node.nodeName.toLowerCase();
						parentName = node.parentNode.nodeName.toLowerCase();

						// Node has a contentEditable value
						if (node.nodeType === 1 && getContentEditable(node)) {
							lastContentEditable = contentEditable;
							contentEditable = getContentEditable(node) === "true";
							hasContentEditableState = true; // We don't want to wrap the container only it's children
						}

						// Stop wrapping on br elements
						if (isEq(nodeName, 'br')) {
							currentWrapElm = 0;

							// Remove any br elements when we wrap things
							if (format.block) {
								dom.remove(node);
							}

							return;
						}

						// If node is wrapper type
						if (format.wrapper && matchNode(node, name, vars)) {
							currentWrapElm = 0;
							return;
						}

						// Can we rename the block
						// TODO: Break this if up, too complex
						if (contentEditable && !hasContentEditableState && format.block &&
							!format.wrapper && isTextBlock(nodeName) && isValid(parentName, wrapName)) {
							node = dom.rename(node, wrapName);
							setElementFormat(node);
							newWrappers.push(node);
							currentWrapElm = 0;
							return;
						}

						// Handle selector patterns
						if (format.selector) {
							// Look for matching formats
							each(formatList, function(format) {
								// Check collapsed state if it exists
								if ('collapsed' in format && format.collapsed !== isCollapsed) {
									return;
								}

								if (dom.is(node, format.selector) && !isCaretNode(node)) {
									setElementFormat(node, format);
									found = true;
									return false;
								}
							});

							// Continue processing if a selector match wasn't found and a inline element is defined
							if (!format.inline || found) {
								currentWrapElm = 0;
								return;
							}
						}

						// Is it valid to wrap this item
						// TODO: Break this if up, too complex
						if (contentEditable && !hasContentEditableState && isValid(wrapName, nodeName) && isValid(parentName, wrapName) &&
								!(!node_specific && node.nodeType === 3 &&
								node.nodeValue.length === 1 &&
								node.nodeValue.charCodeAt(0) === 65279) &&
								!isCaretNode(node) &&
								(!format.inline || !isBlock(node))) {
							// Start wrapping
							if (!currentWrapElm) {
								// Wrap the node
								currentWrapElm = dom.clone(wrapElm, FALSE);
								node.parentNode.insertBefore(currentWrapElm, node);
								newWrappers.push(currentWrapElm);
							}

							currentWrapElm.appendChild(node);
						} else {
							// Start a new wrapper for possible children
							currentWrapElm = 0;

							each(grep(node.childNodes), process);

							if (hasContentEditableState) {
								contentEditable = lastContentEditable; // Restore last contentEditable state from stack
							}

							// End the last wrapper
							currentWrapElm = 0;
						}
					}

					// Process siblings from range
					each(nodes, process);
				});

				// Apply formats to links as well to get the color of the underline to change as well
				if (format.links === true) {
					each(newWrappers, function(node) {
						function process(node) {
							if (node.nodeName === 'A') {
								setElementFormat(node, format);
							}

							each(grep(node.childNodes), process);
						}

						process(node);
					});
				}

				// Cleanup
				each(newWrappers, function(node) {
					var childCount;

					function getChildCount(node) {
						var count = 0;

						each(node.childNodes, function(node) {
							if (!isWhiteSpaceNode(node) && !isBookmarkNode(node)) {
								count++;
							}
						});

						return count;
					}

					function mergeStyles(node) {
						var child, clone;

						each(node.childNodes, function(node) {
							if (node.nodeType == 1 && !isBookmarkNode(node) && !isCaretNode(node)) {
								child = node;
								return FALSE; // break loop
							}
						});

						// If child was found and of the same type as the current node
						if (child && !isBookmarkNode(child) && matchName(child, format)) {
							clone = dom.clone(child, FALSE);
							setElementFormat(clone);

							dom.replace(clone, node, TRUE);
							dom.remove(child, 1);
						}

						return clone || node;
					}

					childCount = getChildCount(node);

					// Remove empty nodes but only if there is multiple wrappers and they are not block
					// elements so never remove single <h1></h1> since that would remove the
					// current empty block element where the caret is at
					if ((newWrappers.length > 1 || !isBlock(node)) && childCount === 0) {
						dom.remove(node, 1);
						return;
					}

					if (format.inline || format.wrapper) {
						// Merges the current node with it's children of similar type to reduce the number of elements
						if (!format.exact && childCount === 1) {
							node = mergeStyles(node);
						}

						// Remove/merge children
						each(formatList, function(format) {
							// Merge all children of similar type will move styles from child to parent
							// this: <span style="color:red"><b><span style="color:red; font-size:10px">text</span></b></span>
							// will become: <span style="color:red"><b><span style="font-size:10px">text</span></b></span>
							each(dom.select(format.inline, node), function(child) {
								if (isBookmarkNode(child)) {
									return;
								}

								removeFormat(format, vars, child, format.exact ? child : null);
							});
						});

						// Remove child if direct parent is of same type
						if (matchNode(node.parentNode, name, vars)) {
							dom.remove(node, 1);
							node = 0;
							return TRUE;
						}

						// Look for parent with similar style format
						if (format.merge_with_parents) {
							dom.getParent(node.parentNode, function(parent) {
								if (matchNode(parent, name, vars)) {
									dom.remove(node, 1);
									node = 0;
									return TRUE;
								}
							});
						}

						// Merge next and previous siblings if they are similar <b>text</b><b>text</b> becomes <b>texttext</b>
						if (node && format.merge_siblings !== false) {
							node = mergeSiblings(getNonWhiteSpaceSibling(node), node);
							node = mergeSiblings(node, getNonWhiteSpaceSibling(node, TRUE));
						}
					}
				});
			}

			if (getContentEditable(selection.getNode()) === "false") {
				node = selection.getNode();
				for (var i = 0, l = formatList.length; i < l; i++) {
					if (formatList[i].ceFalseOverride && dom.is(node, formatList[i].selector)) {
						setElementFormat(node, formatList[i]);
						return;
					}
				}

				return;
			}

			if (format) {
				if (node) {
					if (node.nodeType) {
						rng = dom.createRng();
						rng.setStartBefore(node);
						rng.setEndAfter(node);
						applyRngStyle(expandRng(rng, formatList), null, true);
					} else {
						applyRngStyle(node, null, true);
					}
				} else {
					if (!isCollapsed || !format.inline || dom.select('td.mce-item-selected,th.mce-item-selected').length) {
						// Obtain selection node before selection is unselected by applyRngStyle()
						var curSelNode = ed.selection.getNode();

						// If the formats have a default block and we can't find a parent block then
						// start wrapping it with a DIV this is for forced_root_blocks: false
						// It's kind of a hack but people should be using the default block type P since all desktop editors work that way
						if (!forcedRootBlock && formatList[0].defaultBlock && !dom.getParent(curSelNode, dom.isBlock)) {
							apply(formatList[0].defaultBlock);
						}

						// Apply formatting to selection
						ed.selection.setRng(adjustSelectionToVisibleSelection());
						bookmark = selection.getBookmark();
						applyRngStyle(expandRng(selection.getRng(TRUE), formatList), bookmark);

						// Colored nodes should be underlined so that the color of the underline matches the text color.
						if (format.styles && (format.styles.color || format.styles.textDecoration)) {
							walk(curSelNode, processUnderlineAndColor, 'childNodes');
							processUnderlineAndColor(curSelNode);
						}

						selection.moveToBookmark(bookmark);
						moveStart(selection.getRng(TRUE));
						ed.nodeChanged();
					} else {
						performCaretAction('apply', name, vars);
					}
				}
			}
		}

		/**
		 * Removes the specified format from the current selection or specified node.
		 *
		 * @method remove
		 * @param {String} name Name of format to remove.
		 * @param {Object} vars Optional list of variables to replace within format before removing it.
		 * @param {Node/Range} node Optional node or DOM range to remove the format from defaults to current selection.
		 */
		function remove(name, vars, node, similar) {
			var formatList = get(name), format = formatList[0], bookmark, rng, contentEditable = true;

			// Merges the styles for each node
			function process(node) {
				var children, i, l, lastContentEditable, hasContentEditableState;

				// Node has a contentEditable value
				if (node.nodeType === 1 && getContentEditable(node)) {
					lastContentEditable = contentEditable;
					contentEditable = getContentEditable(node) === "true";
					hasContentEditableState = true; // We don't want to wrap the container only it's children
				}

				// Grab the children first since the nodelist might be changed
				children = grep(node.childNodes);

				// Process current node
				if (contentEditable && !hasContentEditableState) {
					for (i = 0, l = formatList.length; i < l; i++) {
						if (removeFormat(formatList[i], vars, node, node)) {
							break;
						}
					}
				}

				// Process the children
				if (format.deep) {
					if (children.length) {
						for (i = 0, l = children.length; i < l; i++) {
							process(children[i]);
						}

						if (hasContentEditableState) {
							contentEditable = lastContentEditable; // Restore last contentEditable state from stack
						}
					}
				}
			}

			function findFormatRoot(container) {
				var formatRoot;

				// Find format root
				each(getParents(container.parentNode).reverse(), function(parent) {
					var format;

					// Find format root element
					if (!formatRoot && parent.id != '_start' && parent.id != '_end') {
						// Is the node matching the format we are looking for
						format = matchNode(parent, name, vars, similar);
						if (format && format.split !== false) {
							formatRoot = parent;
						}
					}
				});

				return formatRoot;
			}

			function wrapAndSplit(formatRoot, container, target, split) {
				var parent, clone, lastClone, firstClone, i, formatRootParent;

				// Format root found then clone formats and split it
				if (formatRoot) {
					formatRootParent = formatRoot.parentNode;

					for (parent = container.parentNode; parent && parent != formatRootParent; parent = parent.parentNode) {
						clone = dom.clone(parent, FALSE);

						for (i = 0; i < formatList.length; i++) {
							if (removeFormat(formatList[i], vars, clone, clone)) {
								clone = 0;
								break;
							}
						}

						// Build wrapper node
						if (clone) {
							if (lastClone) {
								clone.appendChild(lastClone);
							}

							if (!firstClone) {
								firstClone = clone;
							}

							lastClone = clone;
						}
					}

					// Never split block elements if the format is mixed
					if (split && (!format.mixed || !isBlock(formatRoot))) {
						container = dom.split(formatRoot, container);
					}

					// Wrap container in cloned formats
					if (lastClone) {
						target.parentNode.insertBefore(lastClone, target);
						firstClone.appendChild(target);
					}
				}

				return container;
			}

			function splitToFormatRoot(container) {
				return wrapAndSplit(findFormatRoot(container), container, container, true);
			}

			function unwrap(start) {
				var node = dom.get(start ? '_start' : '_end'),
					out = node[start ? 'firstChild' : 'lastChild'];

				// If the end is placed within the start the result will be removed
				// So this checks if the out node is a bookmark node if it is it
				// checks for another more suitable node
				if (isBookmarkNode(out)) {
					out = out[start ? 'firstChild' : 'lastChild'];
				}

				// Since dom.remove removes empty text nodes then we need to try to find a better node
				if (out.nodeType == 3 && out.data.length === 0) {
					out = start ? node.previousSibling || node.nextSibling : node.nextSibling || node.previousSibling;
				}

				dom.remove(node, true);

				return out;
			}

			function removeRngStyle(rng) {
				var startContainer, endContainer;
				var commonAncestorContainer = rng.commonAncestorContainer;

				rng = expandRng(rng, formatList, TRUE);

				if (format.split) {
					startContainer = getContainer(rng, TRUE);
					endContainer = getContainer(rng);

					if (startContainer != endContainer) {
						// WebKit will render the table incorrectly if we wrap a TH or TD in a SPAN
						// so let's see if we can use the first child instead
						// This will happen if you triple click a table cell and use remove formatting
						if (/^(TR|TH|TD)$/.test(startContainer.nodeName) && startContainer.firstChild) {
							if (startContainer.nodeName == "TR") {
								startContainer = startContainer.firstChild.firstChild || startContainer;
							} else {
								startContainer = startContainer.firstChild || startContainer;
							}
						}

						// Try to adjust endContainer as well if cells on the same row were selected - bug #6410
						if (commonAncestorContainer &&
							/^T(HEAD|BODY|FOOT|R)$/.test(commonAncestorContainer.nodeName) &&
							isTableCell(endContainer) && endContainer.firstChild) {
							endContainer = endContainer.firstChild || endContainer;
						}

						if (dom.isChildOf(startContainer, endContainer) && !isBlock(endContainer) &&
							!isTableCell(startContainer) && !isTableCell(endContainer)) {
							startContainer = wrap(startContainer, 'span', {id: '_start', 'data-mce-type': 'bookmark'});
							splitToFormatRoot(startContainer);
							startContainer = unwrap(TRUE);
							return;
						}

						// Wrap start/end nodes in span element since these might be cloned/moved
						startContainer = wrap(startContainer, 'span', {id: '_start', 'data-mce-type': 'bookmark'});
						endContainer = wrap(endContainer, 'span', {id: '_end', 'data-mce-type': 'bookmark'});

						// Split start/end
						splitToFormatRoot(startContainer);
						splitToFormatRoot(endContainer);

						// Unwrap start/end to get real elements again
						startContainer = unwrap(TRUE);
						endContainer = unwrap();
					} else {
						startContainer = endContainer = splitToFormatRoot(startContainer);
					}

					// Update range positions since they might have changed after the split operations
					rng.startContainer = startContainer.parentNode ? startContainer.parentNode : startContainer;
					rng.startOffset = nodeIndex(startContainer);
					rng.endContainer = endContainer.parentNode ? endContainer.parentNode : endContainer;
					rng.endOffset = nodeIndex(endContainer) + 1;
				}

				// Remove items between start/end
				rangeUtils.walk(rng, function(nodes) {
					each(nodes, function(node) {
						process(node);

						// Remove parent span if it only contains text-decoration: underline, yet a parent node is also underlined.
						if (node.nodeType === 1 && ed.dom.getStyle(node, 'text-decoration') === 'underline' &&
							node.parentNode && getTextDecoration(node.parentNode) === 'underline') {
							removeFormat({
								'deep': false,
								'exact': true,
								'inline': 'span',
								'styles': {
									'textDecoration': 'underline'
								}
							}, null, node);
						}
					});
				});
			}

			// Handle node
			if (node) {
				if (node.nodeType) {
					rng = dom.createRng();
					rng.setStartBefore(node);
					rng.setEndAfter(node);
					removeRngStyle(rng);
				} else {
					removeRngStyle(node);
				}

				return;
			}

			if (getContentEditable(selection.getNode()) === "false") {
				node = selection.getNode();
				for (var i = 0, l = formatList.length; i < l; i++) {
					if (formatList[i].ceFalseOverride) {
						if (removeFormat(formatList[i], vars, node, node)) {
							break;
						}
					}
				}

				return;
			}

			if (!selection.isCollapsed() || !format.inline || dom.select('td.mce-item-selected,th.mce-item-selected').length) {
				bookmark = selection.getBookmark();
				removeRngStyle(selection.getRng(TRUE));
				selection.moveToBookmark(bookmark);

				// Check if start element still has formatting then we are at: "<b>text|</b>text"
				// and need to move the start into the next text node
				if (format.inline && match(name, vars, selection.getStart())) {
					moveStart(selection.getRng(true));
				}

				ed.nodeChanged();
			} else {
				performCaretAction('remove', name, vars, similar);
			}
		}

		/**
		 * Toggles the specified format on/off.
		 *
		 * @method toggle
		 * @param {String} name Name of format to apply/remove.
		 * @param {Object} vars Optional list of variables to replace within format before applying/removing it.
		 * @param {Node} node Optional node to apply the format to or remove from. Defaults to current selection.
		 */
		function toggle(name, vars, node) {
			var fmt = get(name);

			if (match(name, vars, node) && (!('toggle' in fmt[0]) || fmt[0].toggle)) {
				remove(name, vars, node);
			} else {
				apply(name, vars, node);
			}
		}

		/**
		 * Return true/false if the specified node has the specified format.
		 *
		 * @method matchNode
		 * @param {Node} node Node to check the format on.
		 * @param {String} name Format name to check.
		 * @param {Object} vars Optional list of variables to replace before checking it.
		 * @param {Boolean} similar Match format that has similar properties.
		 * @return {Object} Returns the format object it matches or undefined if it doesn't match.
		 */
		function matchNode(node, name, vars, similar) {
			var formatList = get(name), format, i, classes;

			function matchItems(node, format, item_name) {
				var key, value, items = format[item_name], i;

				// Custom match
				if (format.onmatch) {
					return format.onmatch(node, format, item_name);
				}

				// Check all items
				if (items) {
					// Non indexed object
					if (items.length === undef) {
						for (key in items) {
							if (items.hasOwnProperty(key)) {
								if (item_name === 'attributes') {
									value = dom.getAttrib(node, key);
								} else {
									value = getStyle(node, key);
								}

								if (similar && !value && !format.exact) {
									return;
								}

								if ((!similar || format.exact) && !isEq(value, normalizeStyleValue(replaceVars(items[key], vars), key))) {
									return;
								}
							}
						}
					} else {
						// Only one match needed for indexed arrays
						for (i = 0; i < items.length; i++) {
							if (item_name === 'attributes' ? dom.getAttrib(node, items[i]) : getStyle(node, items[i])) {
								return format;
							}
						}
					}
				}

				return format;
			}

			if (formatList && node) {
				// Check each format in list
				for (i = 0; i < formatList.length; i++) {
					format = formatList[i];

					// Name name, attributes, styles and classes
					if (matchName(node, format) && matchItems(node, format, 'attributes') && matchItems(node, format, 'styles')) {
						// Match classes
						if ((classes = format.classes)) {
							for (i = 0; i < classes.length; i++) {
								if (!dom.hasClass(node, classes[i])) {
									return;
								}
							}
						}

						return format;
					}
				}
			}
		}

		/**
		 * Matches the current selection or specified node against the specified format name.
		 *
		 * @method match
		 * @param {String} name Name of format to match.
		 * @param {Object} vars Optional list of variables to replace before checking it.
		 * @param {Node} node Optional node to check.
		 * @return {boolean} true/false if the specified selection/node matches the format.
		 */
		function match(name, vars, node) {
			var startNode;

			function matchParents(node) {
				var root = dom.getRoot();

				if (node === root) {
					return false;
				}

				// Find first node with similar format settings
				node = dom.getParent(node, function(node) {
					return node.parentNode === root || !!matchNode(node, name, vars, true);
				});

				// Do an exact check on the similar format element
				return matchNode(node, name, vars);
			}

			// Check specified node
			if (node) {
				return matchParents(node);
			}

			// Check selected node
			node = selection.getNode();
			if (matchParents(node)) {
				return TRUE;
			}

			// Check start node if it's different
			startNode = selection.getStart();
			if (startNode != node) {
				if (matchParents(startNode)) {
					return TRUE;
				}
			}

			return FALSE;
		}

		/**
		 * Matches the current selection against the array of formats and returns a new array with matching formats.
		 *
		 * @method matchAll
		 * @param {Array} names Name of format to match.
		 * @param {Object} vars Optional list of variables to replace before checking it.
		 * @return {Array} Array with matched formats.
		 */
		function matchAll(names, vars) {
			var startElement, matchedFormatNames = [], checkedMap = {};

			// Check start of selection for formats
			startElement = selection.getStart();
			dom.getParent(startElement, function(node) {
				var i, name;

				for (i = 0; i < names.length; i++) {
					name = names[i];

					if (!checkedMap[name] && matchNode(node, name, vars)) {
						checkedMap[name] = true;
						matchedFormatNames.push(name);
					}
				}
			}, dom.getRoot());

			return matchedFormatNames;
		}

		/**
		 * Returns true/false if the specified format can be applied to the current selection or not. It
		 * will currently only check the state for selector formats, it returns true on all other format types.
		 *
		 * @method canApply
		 * @param {String} name Name of format to check.
		 * @return {boolean} true/false if the specified format can be applied to the current selection/node.
		 */
		function canApply(name) {
			var formatList = get(name), startNode, parents, i, x, selector;

			if (formatList) {
				startNode = selection.getStart();
				parents = getParents(startNode);

				for (x = formatList.length - 1; x >= 0; x--) {
					selector = formatList[x].selector;

					// Format is not selector based then always return TRUE
					// Is it has a defaultBlock then it's likely it can be applied for example align on a non block element line
					if (!selector || formatList[x].defaultBlock) {
						return TRUE;
					}

					for (i = parents.length - 1; i >= 0; i--) {
						if (dom.is(parents[i], selector)) {
							return TRUE;
						}
					}
				}
			}

			return FALSE;
		}

		/**
		 * Executes the specified callback when the current selection matches the formats or not.
		 *
		 * @method formatChanged
		 * @param {String} formats Comma separated list of formats to check for.
		 * @param {function} callback Callback with state and args when the format is changed/toggled on/off.
		 * @param {Boolean} similar True/false state if the match should handle similar or exact formats.
		 */
		function formatChanged(formats, callback, similar) {
			var currentFormats;

			// Setup format node change logic
			if (!formatChangeData) {
				formatChangeData = {};
				currentFormats = {};

				ed.on('NodeChange', function(e) {
					var parents = getParents(e.element), matchedFormats = {};

					// Ignore bogus nodes like the <a> tag created by moveStart()
					parents = Tools.grep(parents, function(node) {
						return node.nodeType == 1 && !node.getAttribute('data-mce-bogus');
					});

					// Check for new formats
					each(formatChangeData, function(callbacks, format) {
						each(parents, function(node) {
							if (matchNode(node, format, {}, callbacks.similar)) {
								if (!currentFormats[format]) {
									// Execute callbacks
									each(callbacks, function(callback) {
										callback(true, {node: node, format: format, parents: parents});
									});

									currentFormats[format] = callbacks;
								}

								matchedFormats[format] = callbacks;
								return false;
							}
						});
					});

					// Check if current formats still match
					each(currentFormats, function(callbacks, format) {
						if (!matchedFormats[format]) {
							delete currentFormats[format];

							each(callbacks, function(callback) {
								callback(false, {node: e.element, format: format, parents: parents});
							});
						}
					});
				});
			}

			// Add format listeners
			each(formats.split(','), function(format) {
				if (!formatChangeData[format]) {
					formatChangeData[format] = [];
					formatChangeData[format].similar = similar;
				}

				formatChangeData[format].push(callback);
			});

			return this;
		}

		/**
		 * Returns a preview css text for the specified format.
		 *
		 * @method getCssText
		 * @param {String/Object} format Format to generate preview css text for.
		 * @return {String} Css text for the specified format.
		 * @example
		 * var cssText1 = editor.formatter.getCssText('bold');
		 * var cssText2 = editor.formatter.getCssText({inline: 'b'});
		 */
		function getCssText(format) {
			return Preview.getCssText(ed, format);
		}

		// Expose to public
		extend(this, {
			get: get,
			register: register,
			unregister: unregister,
			apply: apply,
			remove: remove,
			toggle: toggle,
			match: match,
			matchAll: matchAll,
			matchNode: matchNode,
			canApply: canApply,
			formatChanged: formatChanged,
			getCssText: getCssText
		});

		// Initialize
		defaultFormats();
		addKeyboardShortcuts();
		ed.on('BeforeGetContent', function(e) {
			if (markCaretContainersBogus && e.format != 'raw') {
				markCaretContainersBogus();
			}
		});
		ed.on('mouseup keydown', function(e) {
			if (disableCaretContainer) {
				disableCaretContainer(e);
			}
		});

		// Private functions

		/**
		 * Checks if the specified nodes name matches the format inline/block or selector.
		 *
		 * @private
		 * @param {Node} node Node to match against the specified format.
		 * @param {Object} format Format object o match with.
		 * @return {boolean} true/false if the format matches.
		 */
		function matchName(node, format) {
			// Check for inline match
			if (isEq(node, format.inline)) {
				return TRUE;
			}

			// Check for block match
			if (isEq(node, format.block)) {
				return TRUE;
			}

			// Check for selector match
			if (format.selector) {
				return node.nodeType == 1 && dom.is(node, format.selector);
			}
		}

		/**
		 * Compares two string/nodes regardless of their case.
		 *
		 * @private
		 * @param {String/Node} str1 Node or string to compare.
		 * @param {String/Node} str2 Node or string to compare.
		 * @return {boolean} True/false if they match.
		 */
		function isEq(str1, str2) {
			str1 = str1 || '';
			str2 = str2 || '';

			str1 = '' + (str1.nodeName || str1);
			str2 = '' + (str2.nodeName || str2);

			return str1.toLowerCase() == str2.toLowerCase();
		}

		/**
		 * Returns the style by name on the specified node. This method modifies the style
		 * contents to make it more easy to match. This will resolve a few browser issues.
		 *
		 * @private
		 * @param {Node} node to get style from.
		 * @param {String} name Style name to get.
		 * @return {String} Style item value.
		 */
		function getStyle(node, name) {
			return normalizeStyleValue(dom.getStyle(node, name), name);
		}

		/**
		 * Normalize style value by name. This method modifies the style contents
		 * to make it more easy to match. This will resolve a few browser issues.
		 *
		 * @private
		 * @param {String} value Value to get style from.
		 * @param {String} name Style name to get.
		 * @return {String} Style item value.
		 */
		function normalizeStyleValue(value, name) {
			// Force the format to hex
			if (name == 'color' || name == 'backgroundColor') {
				value = dom.toHex(value);
			}

			// Opera will return bold as 700
			if (name == 'fontWeight' && value == 700) {
				value = 'bold';
			}

			// Normalize fontFamily so "'Font name', Font" becomes: "Font name,Font"
			if (name == 'fontFamily') {
				value = value.replace(/[\'\"]/g, '').replace(/,\s+/g, ',');
			}

			return '' + value;
		}

		/**
		 * Replaces variables in the value. The variable format is %var.
		 *
		 * @private
		 * @param {String} value Value to replace variables in.
		 * @param {Object} vars Name/value array with variables to replace.
		 * @return {String} New value with replaced variables.
		 */
		function replaceVars(value, vars) {
			if (typeof value != "string") {
				value = value(vars);
			} else if (vars) {
				value = value.replace(/%(\w+)/g, function(str, name) {
					return vars[name] || str;
				});
			}

			return value;
		}

		function isWhiteSpaceNode(node) {
			return node && node.nodeType === 3 && /^([\t \r\n]+|)$/.test(node.nodeValue);
		}

		function wrap(node, name, attrs) {
			var wrapper = dom.create(name, attrs);

			node.parentNode.insertBefore(wrapper, node);
			wrapper.appendChild(node);

			return wrapper;
		}

		/**
		 * Expands the specified range like object to depending on format.
		 *
		 * For example on block formats it will move the start/end position
		 * to the beginning of the current block.
		 *
		 * @private
		 * @param {Object} rng Range like object.
		 * @param {Array} format Array with formats to expand by.
		 * @param {Boolean} remove
		 * @return {Object} Expanded range like object.
		 */
		function expandRng(rng, format, remove) {
			var lastIdx, leaf, endPoint,
				startContainer = rng.startContainer,
				startOffset = rng.startOffset,
				endContainer = rng.endContainer,
				endOffset = rng.endOffset;

			// This function walks up the tree if there is no siblings before/after the node
			function findParentContainer(start) {
				var container, parent, sibling, siblingName, root;

				container = parent = start ? startContainer : endContainer;
				siblingName = start ? 'previousSibling' : 'nextSibling';
				root = dom.getRoot();

				function isBogusBr(node) {
					return node.nodeName == "BR" && node.getAttribute('data-mce-bogus') && !node.nextSibling;
				}

				// If it's a text node and the offset is inside the text
				if (container.nodeType == 3 && !isWhiteSpaceNode(container)) {
					if (start ? startOffset > 0 : endOffset < container.nodeValue.length) {
						return container;
					}
				}

				/*eslint no-constant-condition:0 */
				while (true) {
					// Stop expanding on block elements
					if (!format[0].block_expand && isBlock(parent)) {
						return parent;
					}

					// Walk left/right
					for (sibling = parent[siblingName]; sibling; sibling = sibling[siblingName]) {
						if (!isBookmarkNode(sibling) && !isWhiteSpaceNode(sibling) && !isBogusBr(sibling)) {
							return parent;
						}
					}

					// Check if we can move up are we at root level or body level
					if (parent == root || parent.parentNode == root) {
						container = parent;
						break;
					}

					parent = parent.parentNode;
				}

				return container;
			}

			// This function walks down the tree to find the leaf at the selection.
			// The offset is also returned as if node initially a leaf, the offset may be in the middle of the text node.
			function findLeaf(node, offset) {
				if (offset === undef) {
					offset = node.nodeType === 3 ? node.length : node.childNodes.length;
				}

				while (node && node.hasChildNodes()) {
					node = node.childNodes[offset];
					if (node) {
						offset = node.nodeType === 3 ? node.length : node.childNodes.length;
					}
				}
				return {node: node, offset: offset};
			}

			// If index based start position then resolve it
			if (startContainer.nodeType == 1 && startContainer.hasChildNodes()) {
				lastIdx = startContainer.childNodes.length - 1;
				startContainer = startContainer.childNodes[startOffset > lastIdx ? lastIdx : startOffset];

				if (startContainer.nodeType == 3) {
					startOffset = 0;
				}
			}

			// If index based end position then resolve it
			if (endContainer.nodeType == 1 && endContainer.hasChildNodes()) {
				lastIdx = endContainer.childNodes.length - 1;
				endContainer = endContainer.childNodes[endOffset > lastIdx ? lastIdx : endOffset - 1];

				if (endContainer.nodeType == 3) {
					endOffset = endContainer.nodeValue.length;
				}
			}

			// Expands the node to the closes contentEditable false element if it exists
			function findParentContentEditable(node) {
				var parent = node;

				while (parent) {
					if (parent.nodeType === 1 && getContentEditable(parent)) {
						return getContentEditable(parent) === "false" ? parent : node;
					}

					parent = parent.parentNode;
				}

				return node;
			}

			function findWordEndPoint(container, offset, start) {
				var walker, node, pos, lastTextNode;

				function findSpace(node, offset) {
					var pos, pos2, str = node.nodeValue;

					if (typeof offset == "undefined") {
						offset = start ? str.length : 0;
					}

					if (start) {
						pos = str.lastIndexOf(' ', offset);
						pos2 = str.lastIndexOf('\u00a0', offset);
						pos = pos > pos2 ? pos : pos2;

						// Include the space on remove to avoid tag soup
						if (pos !== -1 && !remove) {
							pos++;
						}
					} else {
						pos = str.indexOf(' ', offset);
						pos2 = str.indexOf('\u00a0', offset);
						pos = pos !== -1 && (pos2 === -1 || pos < pos2) ? pos : pos2;
					}

					return pos;
				}

				if (container.nodeType === 3) {
					pos = findSpace(container, offset);

					if (pos !== -1) {
						return {container: container, offset: pos};
					}

					lastTextNode = container;
				}

				// Walk the nodes inside the block
				walker = new TreeWalker(container, dom.getParent(container, isBlock) || ed.getBody());
				while ((node = walker[start ? 'prev' : 'next']())) {
					if (node.nodeType === 3) {
						lastTextNode = node;
						pos = findSpace(node);

						if (pos !== -1) {
							return {container: node, offset: pos};
						}
					} else if (isBlock(node)) {
						break;
					}
				}

				if (lastTextNode) {
					if (start) {
						offset = 0;
					} else {
						offset = lastTextNode.length;
					}

					return {container: lastTextNode, offset: offset};
				}
			}

			function findSelectorEndPoint(container, sibling_name) {
				var parents, i, y, curFormat;

				if (container.nodeType == 3 && container.nodeValue.length === 0 && container[sibling_name]) {
					container = container[sibling_name];
				}

				parents = getParents(container);
				for (i = 0; i < parents.length; i++) {
					for (y = 0; y < format.length; y++) {
						curFormat = format[y];

						// If collapsed state is set then skip formats that doesn't match that
						if ("collapsed" in curFormat && curFormat.collapsed !== rng.collapsed) {
							continue;
						}

						if (dom.is(parents[i], curFormat.selector)) {
							return parents[i];
						}
					}
				}

				return container;
			}

			function findBlockEndPoint(container, sibling_name) {
				var node, root = dom.getRoot();

				// Expand to block of similar type
				if (!format[0].wrapper) {
					node = dom.getParent(container, format[0].block, root);
				}

				// Expand to first wrappable block element or any block element
				if (!node) {
					node = dom.getParent(container.nodeType == 3 ? container.parentNode : container, function(node) {
						// Fixes #6183 where it would expand to editable parent element in inline mode
						return node != root && isTextBlock(node);
					});
				}

				// Exclude inner lists from wrapping
				if (node && format[0].wrapper) {
					node = getParents(node, 'ul,ol').reverse()[0] || node;
				}

				// Didn't find a block element look for first/last wrappable element
				if (!node) {
					node = container;

					while (node[sibling_name] && !isBlock(node[sibling_name])) {
						node = node[sibling_name];

						// Break on BR but include it will be removed later on
						// we can't remove it now since we need to check if it can be wrapped
						if (isEq(node, 'br')) {
							break;
						}
					}
				}

				return node || container;
			}

			// Expand to closest contentEditable element
			startContainer = findParentContentEditable(startContainer);
			endContainer = findParentContentEditable(endContainer);

			// Exclude bookmark nodes if possible
			if (isBookmarkNode(startContainer.parentNode) || isBookmarkNode(startContainer)) {
				startContainer = isBookmarkNode(startContainer) ? startContainer : startContainer.parentNode;
				startContainer = startContainer.nextSibling || startContainer;

				if (startContainer.nodeType == 3) {
					startOffset = 0;
				}
			}

			if (isBookmarkNode(endContainer.parentNode) || isBookmarkNode(endContainer)) {
				endContainer = isBookmarkNode(endContainer) ? endContainer : endContainer.parentNode;
				endContainer = endContainer.previousSibling || endContainer;

				if (endContainer.nodeType == 3) {
					endOffset = endContainer.length;
				}
			}

			if (format[0].inline) {
				if (rng.collapsed) {
					// Expand left to closest word boundary
					endPoint = findWordEndPoint(startContainer, startOffset, true);
					if (endPoint) {
						startContainer = endPoint.container;
						startOffset = endPoint.offset;
					}

					// Expand right to closest word boundary
					endPoint = findWordEndPoint(endContainer, endOffset);
					if (endPoint) {
						endContainer = endPoint.container;
						endOffset = endPoint.offset;
					}
				}

				// Avoid applying formatting to a trailing space.
				leaf = findLeaf(endContainer, endOffset);
				if (leaf.node) {
					while (leaf.node && leaf.offset === 0 && leaf.node.previousSibling) {
						leaf = findLeaf(leaf.node.previousSibling);
					}

					if (leaf.node && leaf.offset > 0 && leaf.node.nodeType === 3 &&
							leaf.node.nodeValue.charAt(leaf.offset - 1) === ' ') {

						if (leaf.offset > 1) {
							endContainer = leaf.node;
							endContainer.splitText(leaf.offset - 1);
						}
					}
				}
			}

			// Move start/end point up the tree if the leaves are sharp and if we are in different containers
			// Example * becomes !: !<p><b><i>*text</i><i>text*</i></b></p>!
			// This will reduce the number of wrapper elements that needs to be created
			// Move start point up the tree
			if (format[0].inline || format[0].block_expand) {
				if (!format[0].inline || (startContainer.nodeType != 3 || startOffset === 0)) {
					startContainer = findParentContainer(true);
				}

				if (!format[0].inline || (endContainer.nodeType != 3 || endOffset === endContainer.nodeValue.length)) {
					endContainer = findParentContainer();
				}
			}

			// Expand start/end container to matching selector
			if (format[0].selector && format[0].expand !== FALSE && !format[0].inline) {
				// Find new startContainer/endContainer if there is better one
				startContainer = findSelectorEndPoint(startContainer, 'previousSibling');
				endContainer = findSelectorEndPoint(endContainer, 'nextSibling');
			}

			// Expand start/end container to matching block element or text node
			if (format[0].block || format[0].selector) {
				// Find new startContainer/endContainer if there is better one
				startContainer = findBlockEndPoint(startContainer, 'previousSibling');
				endContainer = findBlockEndPoint(endContainer, 'nextSibling');

				// Non block element then try to expand up the leaf
				if (format[0].block) {
					if (!isBlock(startContainer)) {
						startContainer = findParentContainer(true);
					}

					if (!isBlock(endContainer)) {
						endContainer = findParentContainer();
					}
				}
			}

			// Setup index for startContainer
			if (startContainer.nodeType == 1) {
				startOffset = nodeIndex(startContainer);
				startContainer = startContainer.parentNode;
			}

			// Setup index for endContainer
			if (endContainer.nodeType == 1) {
				endOffset = nodeIndex(endContainer) + 1;
				endContainer = endContainer.parentNode;
			}

			// Return new range like object
			return {
				startContainer: startContainer,
				startOffset: startOffset,
				endContainer: endContainer,
				endOffset: endOffset
			};
		}

		function isColorFormatAndAnchor(node, format) {
			return format.links && node.tagName == 'A';
		}

		/**
		 * Removes the specified format for the specified node. It will also remove the node if it doesn't have
		 * any attributes if the format specifies it to do so.
		 *
		 * @private
		 * @param {Object} format Format object with items to remove from node.
		 * @param {Object} vars Name/value object with variables to apply to format.
		 * @param {Node} node Node to remove the format styles on.
		 * @param {Node} compare_node Optional compare node, if specified the styles will be compared to that node.
		 * @return {Boolean} True/false if the node was removed or not.
		 */
		function removeFormat(format, vars, node, compare_node) {
			var i, attrs, stylesModified;

			// Check if node matches format
			if (!matchName(node, format) && !isColorFormatAndAnchor(node, format)) {
				return FALSE;
			}

			// Should we compare with format attribs and styles
			if (format.remove != 'all') {
				// Remove styles
				each(format.styles, function(value, name) {
					value = normalizeStyleValue(replaceVars(value, vars), name);

					// Indexed array
					if (typeof name === 'number') {
						name = value;
						compare_node = 0;
					}

					if (format.remove_similar || (!compare_node || isEq(getStyle(compare_node, name), value))) {
						dom.setStyle(node, name, '');
					}

					stylesModified = 1;
				});

				// Remove style attribute if it's empty
				if (stylesModified && dom.getAttrib(node, 'style') === '') {
					node.removeAttribute('style');
					node.removeAttribute('data-mce-style');
				}

				// Remove attributes
				each(format.attributes, function(value, name) {
					var valueOut;

					value = replaceVars(value, vars);

					// Indexed array
					if (typeof name === 'number') {
						name = value;
						compare_node = 0;
					}

					if (!compare_node || isEq(dom.getAttrib(compare_node, name), value)) {
						// Keep internal classes
						if (name == 'class') {
							value = dom.getAttrib(node, name);
							if (value) {
								// Build new class value where everything is removed except the internal prefixed classes
								valueOut = '';
								each(value.split(/\s+/), function(cls) {
									if (/mce\-\w+/.test(cls)) {
										valueOut += (valueOut ? ' ' : '') + cls;
									}
								});

								// We got some internal classes left
								if (valueOut) {
									dom.setAttrib(node, name, valueOut);
									return;
								}
							}
						}

						// IE6 has a bug where the attribute doesn't get removed correctly
						if (name == "class") {
							node.removeAttribute('className');
						}

						// Remove mce prefixed attributes
						if (MCE_ATTR_RE.test(name)) {
							node.removeAttribute('data-mce-' + name);
						}

						node.removeAttribute(name);
					}
				});

				// Remove classes
				each(format.classes, function(value) {
					value = replaceVars(value, vars);

					if (!compare_node || dom.hasClass(compare_node, value)) {
						dom.removeClass(node, value);
					}
				});

				// Check for non internal attributes
				attrs = dom.getAttribs(node);
				for (i = 0; i < attrs.length; i++) {
					if (attrs[i].nodeName.indexOf('_') !== 0) {
						return FALSE;
					}
				}
			}

			// Remove the inline child if it's empty for example <b> or <span>
			if (format.remove != 'none') {
				removeNode(node, format);
				return TRUE;
			}
		}

		/**
		 * Removes the node and wrap it's children in paragraphs before doing so or
		 * appends BR elements to the beginning/end of the block element if forcedRootBlocks is disabled.
		 *
		 * If the div in the node below gets removed:
		 *  text<div>text</div>text
		 *
		 * Output becomes:
		 *  text<div><br />text<br /></div>text
		 *
		 * So when the div is removed the result is:
		 *  text<br />text<br />text
		 *
		 * @private
		 * @param {Node} node Node to remove + apply BR/P elements to.
		 * @param {Object} format Format rule.
		 * @return {Node} Input node.
		 */
		function removeNode(node, format) {
			var parentNode = node.parentNode, rootBlockElm;

			function find(node, next, inc) {
				node = getNonWhiteSpaceSibling(node, next, inc);

				return !node || (node.nodeName == 'BR' || isBlock(node));
			}

			if (format.block) {
				if (!forcedRootBlock) {
					// Append BR elements if needed before we remove the block
					if (isBlock(node) && !isBlock(parentNode)) {
						if (!find(node, FALSE) && !find(node.firstChild, TRUE, 1)) {
							node.insertBefore(dom.create('br'), node.firstChild);
						}

						if (!find(node, TRUE) && !find(node.lastChild, FALSE, 1)) {
							node.appendChild(dom.create('br'));
						}
					}
				} else {
					// Wrap the block in a forcedRootBlock if we are at the root of document
					if (parentNode == dom.getRoot()) {
						if (!format.list_block || !isEq(node, format.list_block)) {
							each(grep(node.childNodes), function(node) {
								if (isValid(forcedRootBlock, node.nodeName.toLowerCase())) {
									if (!rootBlockElm) {
										rootBlockElm = wrap(node, forcedRootBlock);
										dom.setAttribs(rootBlockElm, ed.settings.forced_root_block_attrs);
									} else {
										rootBlockElm.appendChild(node);
									}
								} else {
									rootBlockElm = 0;
								}
							});
						}
					}
				}
			}

			// Never remove nodes that isn't the specified inline element if a selector is specified too
			if (format.selector && format.inline && !isEq(format.inline, node)) {
				return;
			}

			dom.remove(node, 1);
		}

		/**
		 * Returns the next/previous non whitespace node.
		 *
		 * @private
		 * @param {Node} node Node to start at.
		 * @param {boolean} next (Optional) Include next or previous node defaults to previous.
		 * @param {boolean} inc (Optional) Include the current node in checking. Defaults to false.
		 * @return {Node} Next or previous node or undefined if it wasn't found.
		 */
		function getNonWhiteSpaceSibling(node, next, inc) {
			if (node) {
				next = next ? 'nextSibling' : 'previousSibling';

				for (node = inc ? node : node[next]; node; node = node[next]) {
					if (node.nodeType == 1 || !isWhiteSpaceNode(node)) {
						return node;
					}
				}
			}
		}

		/**
		 * Merges the next/previous sibling element if they match.
		 *
		 * @private
		 * @param {Node} prev Previous node to compare/merge.
		 * @param {Node} next Next node to compare/merge.
		 * @return {Node} Next node if we didn't merge and prev node if we did.
		 */
		function mergeSiblings(prev, next) {
			var sibling, tmpSibling, elementUtils = new ElementUtils(dom);

			function findElementSibling(node, sibling_name) {
				for (sibling = node; sibling; sibling = sibling[sibling_name]) {
					if (sibling.nodeType == 3 && sibling.nodeValue.length !== 0) {
						return node;
					}

					if (sibling.nodeType == 1 && !isBookmarkNode(sibling)) {
						return sibling;
					}
				}

				return node;
			}

			// Check if next/prev exists and that they are elements
			if (prev && next) {
				// If previous sibling is empty then jump over it
				prev = findElementSibling(prev, 'previousSibling');
				next = findElementSibling(next, 'nextSibling');

				// Compare next and previous nodes
				if (elementUtils.compare(prev, next)) {
					// Append nodes between
					for (sibling = prev.nextSibling; sibling && sibling != next;) {
						tmpSibling = sibling;
						sibling = sibling.nextSibling;
						prev.appendChild(tmpSibling);
					}

					// Remove next node
					dom.remove(next);

					// Move children into prev node
					each(grep(next.childNodes), function(node) {
						prev.appendChild(node);
					});

					return prev;
				}
			}

			return next;
		}

		function getContainer(rng, start) {
			var container, offset, lastIdx;

			container = rng[start ? 'startContainer' : 'endContainer'];
			offset = rng[start ? 'startOffset' : 'endOffset'];

			if (container.nodeType == 1) {
				lastIdx = container.childNodes.length - 1;

				if (!start && offset) {
					offset--;
				}

				container = container.childNodes[offset > lastIdx ? lastIdx : offset];
			}

			// If start text node is excluded then walk to the next node
			if (container.nodeType === 3 && start && offset >= container.nodeValue.length) {
				container = new TreeWalker(container, ed.getBody()).next() || container;
			}

			// If end text node is excluded then walk to the previous node
			if (container.nodeType === 3 && !start && offset === 0) {
				container = new TreeWalker(container, ed.getBody()).prev() || container;
			}

			return container;
		}

		function performCaretAction(type, name, vars, similar) {
			var caretContainerId = '_mce_caret', debug = ed.settings.caret_debug;

			// Creates a caret container bogus element
			function createCaretContainer(fill) {
				var caretContainer = dom.create('span', {id: caretContainerId, 'data-mce-bogus': true, style: debug ? 'color:red' : ''});

				if (fill) {
					caretContainer.appendChild(ed.getDoc().createTextNode(INVISIBLE_CHAR));
				}

				return caretContainer;
			}

			function isCaretContainerEmpty(node, nodes) {
				while (node) {
					if ((node.nodeType === 3 && node.nodeValue !== INVISIBLE_CHAR) || node.childNodes.length > 1) {
						return false;
					}

					// Collect nodes
					if (nodes && node.nodeType === 1) {
						nodes.push(node);
					}

					node = node.firstChild;
				}

				return true;
			}

			// Returns any parent caret container element
			function getParentCaretContainer(node) {
				while (node) {
					if (node.id === caretContainerId) {
						return node;
					}

					node = node.parentNode;
				}
			}

			// Finds the first text node in the specified node
			function findFirstTextNode(node) {
				var walker;

				if (node) {
					walker = new TreeWalker(node, node);

					for (node = walker.current(); node; node = walker.next()) {
						if (node.nodeType === 3) {
							return node;
						}
					}
				}
			}

			// Removes the caret container for the specified node or all on the current document
			function removeCaretContainer(node, move_caret) {
				var child, rng;

				if (!node) {
					node = getParentCaretContainer(selection.getStart());

					if (!node) {
						while ((node = dom.get(caretContainerId))) {
							removeCaretContainer(node, false);
						}
					}
				} else {
					rng = selection.getRng(true);

					if (isCaretContainerEmpty(node)) {
						if (move_caret !== false) {
							rng.setStartBefore(node);
							rng.setEndBefore(node);
						}

						dom.remove(node);
					} else {
						child = findFirstTextNode(node);

						if (child.nodeValue.charAt(0) === INVISIBLE_CHAR) {
							child.deleteData(0, 1);

							// Fix for bug #6976
							if (rng.startContainer == child && rng.startOffset > 0) {
								rng.setStart(child, rng.startOffset - 1);
							}

							if (rng.endContainer == child && rng.endOffset > 0) {
								rng.setEnd(child, rng.endOffset - 1);
							}
						}

						dom.remove(node, 1);
					}

					selection.setRng(rng);
				}
			}

			// Applies formatting to the caret position
			function applyCaretFormat() {
				var rng, caretContainer, textNode, offset, bookmark, container, text;

				rng = selection.getRng(true);
				offset = rng.startOffset;
				container = rng.startContainer;
				text = container.nodeValue;

				caretContainer = getParentCaretContainer(selection.getStart());
				if (caretContainer) {
					textNode = findFirstTextNode(caretContainer);
				}

				// Expand to word is caret is in the middle of a text node and the char before/after is a alpha numeric character
				if (text && offset > 0 && offset < text.length && /\w/.test(text.charAt(offset)) && /\w/.test(text.charAt(offset - 1))) {
					// Get bookmark of caret position
					bookmark = selection.getBookmark();

					// Collapse bookmark range (WebKit)
					rng.collapse(true);

					// Expand the range to the closest word and split it at those points
					rng = expandRng(rng, get(name));
					rng = rangeUtils.split(rng);

					// Apply the format to the range
					apply(name, vars, rng);

					// Move selection back to caret position
					selection.moveToBookmark(bookmark);
				} else {
					if (!caretContainer || textNode.nodeValue !== INVISIBLE_CHAR) {
						caretContainer = createCaretContainer(true);
						textNode = caretContainer.firstChild;

						rng.insertNode(caretContainer);
						offset = 1;

						apply(name, vars, caretContainer);
					} else {
						apply(name, vars, caretContainer);
					}

					// Move selection to text node
					selection.setCursorLocation(textNode, offset);
				}
			}

			function removeCaretFormat() {
				var rng = selection.getRng(true), container, offset, bookmark,
					hasContentAfter, node, formatNode, parents = [], i, caretContainer;

				container = rng.startContainer;
				offset = rng.startOffset;
				node = container;

				if (container.nodeType == 3) {
					if (offset != container.nodeValue.length) {
						hasContentAfter = true;
					}

					node = node.parentNode;
				}

				while (node) {
					if (matchNode(node, name, vars, similar)) {
						formatNode = node;
						break;
					}

					if (node.nextSibling) {
						hasContentAfter = true;
					}

					parents.push(node);
					node = node.parentNode;
				}

				// Node doesn't have the specified format
				if (!formatNode) {
					return;
				}

				// Is there contents after the caret then remove the format on the element
				if (hasContentAfter) {
					// Get bookmark of caret position
					bookmark = selection.getBookmark();

					// Collapse bookmark range (WebKit)
					rng.collapse(true);

					// Expand the range to the closest word and split it at those points
					rng = expandRng(rng, get(name), true);
					rng = rangeUtils.split(rng);

					// Remove the format from the range
					remove(name, vars, rng);

					// Move selection back to caret position
					selection.moveToBookmark(bookmark);
				} else {
					caretContainer = createCaretContainer();

					node = caretContainer;
					for (i = parents.length - 1; i >= 0; i--) {
						node.appendChild(dom.clone(parents[i], false));
						node = node.firstChild;
					}

					// Insert invisible character into inner most format element
					node.appendChild(dom.doc.createTextNode(INVISIBLE_CHAR));
					node = node.firstChild;

					var block = dom.getParent(formatNode, isTextBlock);

					if (block && dom.isEmpty(block)) {
						// Replace formatNode with caretContainer when removing format from empty block like <p><b>|</b></p>
						formatNode.parentNode.replaceChild(caretContainer, formatNode);
					} else {
						// Insert caret container after the formatted node
						dom.insertAfter(caretContainer, formatNode);
					}

					// Move selection to text node
					selection.setCursorLocation(node, 1);

					// If the formatNode is empty, we can remove it safely.
					if (dom.isEmpty(formatNode)) {
						dom.remove(formatNode);
					}
				}
			}

			// Checks if the parent caret container node isn't empty if that is the case it
			// will remove the bogus state on all children that isn't empty
			function unmarkBogusCaretParents() {
				var caretContainer;

				caretContainer = getParentCaretContainer(selection.getStart());
				if (caretContainer && !dom.isEmpty(caretContainer)) {
					walk(caretContainer, function(node) {
						if (node.nodeType == 1 && node.id !== caretContainerId && !dom.isEmpty(node)) {
							dom.setAttrib(node, 'data-mce-bogus', null);
						}
					}, 'childNodes');
				}
			}

			// Only bind the caret events once
			if (!ed._hasCaretEvents) {
				// Mark current caret container elements as bogus when getting the contents so we don't end up with empty elements
				markCaretContainersBogus = function() {
					var nodes = [], i;

					if (isCaretContainerEmpty(getParentCaretContainer(selection.getStart()), nodes)) {
						// Mark children
						i = nodes.length;
						while (i--) {
							dom.setAttrib(nodes[i], 'data-mce-bogus', '1');
						}
					}
				};

				disableCaretContainer = function(e) {
					var keyCode = e.keyCode;

					removeCaretContainer();

					// Remove caret container if it's empty
					if (keyCode == 8 && selection.isCollapsed() && selection.getStart().innerHTML == INVISIBLE_CHAR) {
						removeCaretContainer(getParentCaretContainer(selection.getStart()));
					}

					// Remove caret container on keydown and it's left/right arrow keys
					if (keyCode == 37 || keyCode == 39) {
						removeCaretContainer(getParentCaretContainer(selection.getStart()));
					}

					unmarkBogusCaretParents();
				};

				// Remove bogus state if they got filled by contents using editor.selection.setContent
				ed.on('SetContent', function(e) {
					if (e.selection) {
						unmarkBogusCaretParents();
					}
				});
				ed._hasCaretEvents = true;
			}

			// Do apply or remove caret format
			if (type == "apply") {
				applyCaretFormat();
			} else {
				removeCaretFormat();
			}
		}

		/**
		 * Moves the start to the first suitable text node.
		 */
		function moveStart(rng) {
			var container = rng.startContainer,
					offset = rng.startOffset, isAtEndOfText,
					walker, node, nodes, tmpNode;

			if (rng.startContainer == rng.endContainer) {
				if (isInlineBlock(rng.startContainer.childNodes[rng.startOffset])) {
					return;
				}
			}

			// Convert text node into index if possible
			if (container.nodeType == 3 && offset >= container.nodeValue.length) {
				// Get the parent container location and walk from there
				offset = nodeIndex(container);
				container = container.parentNode;
				isAtEndOfText = true;
			}

			// Move startContainer/startOffset in to a suitable node
			if (container.nodeType == 1) {
				nodes = container.childNodes;
				container = nodes[Math.min(offset, nodes.length - 1)];
				walker = new TreeWalker(container, dom.getParent(container, dom.isBlock));

				// If offset is at end of the parent node walk to the next one
				if (offset > nodes.length - 1 || isAtEndOfText) {
					walker.next();
				}

				for (node = walker.current(); node; node = walker.next()) {
					if (node.nodeType == 3 && !isWhiteSpaceNode(node)) {
						// IE has a "neat" feature where it moves the start node into the closest element
						// we can avoid this by inserting an element before it and then remove it after we set the selection
						tmpNode = dom.create('a', {'data-mce-bogus': 'all'}, INVISIBLE_CHAR);
						node.parentNode.insertBefore(tmpNode, node);

						// Set selection and remove tmpNode
						rng.setStart(node, 0);
						selection.setRng(rng);
						dom.remove(tmpNode);

						return;
					}
				}
			}
		}
	};
});
