Features

• Introduced the View#hasDomSelection property. Closes ckeditor/ckeditor5#6485. (152bdab)

Bug fixes

• Fixed a crash that was happening in some scenarios when undoing table background change. Closes ckeditor/ckeditor5#6265. (f0902fb)
• Graveyard selection fix no longer breaks the editor in case of intersecting ranges. Closes ckeditor/ckeditor5#6501. Closes ckeditor/ckeditor5#6382. (c208ce1)

Other changes

• Improved performance of Position getters (~60% gain). Reduced time of some common tasks (like loading complex content) by up to 30%. Closes ckeditor/ckeditor5#6579. (670cd7b)
• Improved performance of TreeWalker by up to 40%. This optimization affects common tasks such as loading the editor data. Closes ckeditor/ckeditor5#6582. (08e8294)
• Improved the performance of the Position constructor by optimizing the code path where an element is passed as the position root parameter. Closes ckeditor/ckeditor5#6528. (bfc6c88)
• Inlined parent is() calls in model and view classes to improve the editor performance. Closes ckeditor/ckeditor5#6529. (ff04509)

MAJOR BREAKING CHANGES

• EditingController requires an instance of StylesProcessor in its constructor.
• DataController requires an instance of StylesProcessor in its constructor.
• DomConverter, HtmlDataProcessor and XmlDataProcessor require an instance of the view document in their constructors.
• The View class requires an instance of StylesProcessor as its first argument.
• The createViewElementFromHighlightDescriptor() function that is exported by src/conversion/downcasthelpers.js file requires an instance of the view document as its first argument.
• Method view.Document#addStyleProcessorRules() has been moved to the DataController class.
• The #document getter was removed from model nodes. Only the root element holds the reference to the model document. For attached nodes, use node.root.document to access it.

MINOR BREAKING CHANGES

• DataController does not accept the data processor instance any more.

Features

• Implemented the model and view Range#getContainedElement() methods. Closes ckeditor/ckeditor5#6364. (8fb1efa)

Bug fixes

• Fixed renderer bug causing editor crash in a range of scenarios involving reusing DOM elements. Closes ckeditor/ckeditor5#6092. (67884da)

Other changes

• DataController will now use a single instance of the view document for all its operations (DataController#viewDocument). Closes ckeditor/ckeditor5#6381. (851bac6)
• Document#version is no longer read-only. (968b193)
• StylesProcessor rules will not be stored in a singleton, which made them shared between editor instances. In order to allow binding a styles processor instance to a specific view document, we had to replace a dynamic #document property in view nodes with a static one, set upon node creation. Closes ckeditor/ckeditor5#6091. (0e2f02e)
• Introduced support for multi-range selections. Closes ckeditor/ckeditor5#6116. (ffce577)

Features

• Introduced CSS style normalization for conversion. Closes ckeditor/ckeditor5#6047. (b2a8189)
• Added a startsWith() method to SchemaContext. (11fa53a)
• Introduced DocumentSelection#event:change:marker. Closes ckeditor/ckeditor5#6133. (5106014)
• Introduced Model#createOperationFromJSON() which is an alias for OperationFactory.fromJSON(). Closes ckeditor/ckeditor5#6094. (ebaa2cc)

Bug fixes

• Changes irrelevant to the view (e.g. inside UIElements) will no longer force a view render nor will they trigger mutation event on the document. Closes ckeditor/ckeditor5#5600. (b7e2bfe)
• DOM selection change will not be converted if the selection was placed outside of the editable element. Closes ckeditor/ckeditor5#4199. (1c3749e)

Other changes

• Allow selection on object elements. Closes ckeditor/ckeditor5#6154. (0dec72d)
• Improved parseAttributes() function performance. This results in improved editor data processing speed. Closes ckeditor/ckeditor5#5854. (ecaf056)

Other changes

• Split debug tools between the engine files. You do not need to add debug plugin to the editor if you want to use --debug engine building flag anymore. Closes ckeditor/ckeditor5#5649. (353f091)

MAJOR BREAKING CHANGES

• The behavior of block filler detection on DOM to view conversion was changed. Now, it specifically checks the parent of a text node to check whether it is a block. Which means that a list of block element names has to be used. If you use custom elements or use one of the HTML elements which CKEditor 5 does not recognize as a block element, see #404 and DomConverter.blockElements documentation.
• The Selection#getTopMostBlocks() was removed from the public API. Use Selection#getSelectedBlocks() instead.
• The Selection#getSelectedBlocks() does not return blocks nested in other blocks now.

Features

• Added support for creating elements from other XML namespaces. See ckeditor/ckeditor5#2088. (a9190c9)

Bug fixes

• Added a proper check for name-only view matcher in attribute upcast converters. Closes #1786. (2210696)
• Improved filtering out disallowed attributes on child elements. #1789. (c5033b6)
• Improved performance when working with fake selections. Closes #1791. (f073ad5)
• Placeholder should not be visible in the read-only mode. Closes ckeditor/ckeditor5#1987. (730c417)
• Remove only real block fillers on DOM to view conversion. Closes #404. (6d2810b)
• The renderer should not update DOM selection when document has active composition. Closes #1782. Closes ckeditor/ckeditor5#1333. (c698683)

Other changes

• Added error handling to the common code execution paths. Part of ckeditor/ckeditor5#1304. (220b52f)
• Removed the Selection#getTopMostBlocks() method. Closes ckeditor/ckeditor5-widget#95. Closes ckeditor/ckeditor5-table#199. (7970f17)

Features

• transformSets() will now return a Map instance linking transformed operations to the original operations. (61da3ec)
• Brought support for RTL content in the bindTwoStepCaretToAttribute() helper. See ckeditor/ckeditor5#1151. (d57ff5a)
• Introduced model.Differ#refreshItem(). (7dc8710)
• Introduced the is() method to additional objects from the model and view realms. Closes #1667. (89dbe43)

Bug fixes

• Fixed problem with handling very large text nodes. (a7ae813)
• Prevented Differ crashing in some scenarios involving attribute changes on elements. Closes #1764. (482e55e)

Other changes

• Add unwrapElement() method to UpcastWriter. (9e97196)
• Allowed for unbinding single elements from a marker name in Mapper. Closes #1758. (52e701d)
• The issue tracker for this package was moved to https://github.com/ckeditor/ckeditor5/issues. See ckeditor/ckeditor5#1988. (6ed94c6)
• Introduced automatic marker re-rendering during conversion for markers which view element was unbound. Closes #1780. (5661fb6)
• Position getters (such as #parent or #index) will throw when position points at an incorrect place in its root. Closes #1776. (a359866)

BREAKING CHANGES

• New parameter introduced in DowncastDispatcher#convertChanges(). Now it is convertChanges( differ, markers, writer ).
• Although it was rather impossible to use DowncastDispatcher without specifying any conversion API in the constructor, now it is a required parameter.
• The bindTwoStepCaretToAttribute() helper arguments syntax has changed (replaced by an object). Please refer to the helper documentation to learn more.
• Mapper#unbindElementsFromMarkerName( markerName ) was replaced by Mapper#unbindElementFromMarkerName( element, markerName ).

Internal changes only (updated dependencies, documentation, etc.).

Features

• Added view.Document#event:beforeinput. (c74c3d6)
• Introduced the type parameter to the model.createBatch() method. (389b72e)

Bug fixes

• model.Writer#insert() will no longer crash when the data to set contains markers that are already in the editor content. Closes #1721. (4ff0656)
• Selection will not change during forbidden copy-paste operation inside table cell. Closes ckeditor/ckeditor5#1380. (ab15b17)

Other changes

• Changed how  s are generated on the view->DOM rendering. Closes #1747. (da5670a)

Bug fixes

• Prevented from losing selection attributes between operations (fixes a bug with text composition). Closes https://github.com/ckeditor/ckeditor5-typing/issues/188. (42dcb25)

Other changes

• Added more cases of affected markers on merging in model.Writer. Closes #1738. (01ff6e6)

Features

• Model#insertContent() will return a range affected by the insertion. (f4e4644)

  In Model#deleteContent(), added doNotAutoparagraph flag to options.
  Position and LivePosition static creators should handle stickiness param.

• Added possibility to refresh the marker with no changes through Writer#updateMarker() method. Closes #1649. (cf56d90)

• Introduced Schema#setAttributeProperties() and Schema#getAttributeProperties() methods. Closes ckeditor/ckeditor5#1659. (1c6f83a)

• Introduced UpcastConversionApi#getSplitParts(). Also, provided a way to set upcast conversion helper fired for every view element. Closes ckeditor/ckeditor5#1580. Closes ckeditor/ckeditor5#1581. (d0ee3f4)

Bug fixes

• view.DowncastWriter will now correctly wrap and unwrap nested attribute elements. Closes #1716. Closes ckeditor/ckeditor5-font#30. (4126359)
• Attribute and remove change on intersecting ranges done in the same change block will be correctly saved in Differ and downcasted. Closes ckeditor/ckeditor5#1645. (b2a9d86)
• Editor will no longer crash during undo in some pasting+remove scenarios. Closes #1701. (ca619e7)
• Made sure that Schema#getAttributeProperties() always returns an object. Closes #1717. (b3f5da3)
• Markers should be now correctly upcasted inside any element. Closes #1697. (3706324)
• Model#deleteContent() will not throw anymore if the passed selection is in the graveyard root. Closes #1706. (bd875c7)
• The editor will not throw an error when updating an empty fake selection container. Closes #1714. (c48f5a4)