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Change Log

All notable changes to this project will be documented in this file. Updates should follow the Keep a CHANGELOG principles.

Upgrading from 1.x? See https://commonmark.thephpleague.com/2.0/upgrading/ for additional information.

Unreleased

2.5.3 - 2024-08-16

Changed

  • Made compatible with CommonMark spec 0.31.1, including:
    • Remove source, add search to list of recognized block tags

2.5.2 - 2024-08-14

Changed

  • Boolean attributes now require an explicit true value (#1040)

Fixed

  • Fixed regression where text could be misinterpreted as an attribute (#1040)

2.5.1 - 2024-07-24

Fixed

  • Fixed attribute parsing incorrectly parsing mustache-like syntax (#1035)
  • Fixed incorrect Table start line numbers (#1037)

2.5.0 - 2024-07-22

Added

  • The AttributesExtension now supports attributes without values (#985, #986)
  • The AutolinkExtension exposes two new configuration options to override the default behavior (#969, #987):
    • autolink/allowed_protocols - an array of protocols to allow autolinking for
    • autolink/default_protocol - the default protocol to use when none is specified

Changed

  • Made compatible with CommonMark spec 0.31.0, including:
    • Allow closing fence to be followed by tabs
    • Remove restrictive limitation on inline comments
    • Unicode symbols now treated like punctuation (for purposes of flankingness)
    • Trailing tabs on the last line of indented code blocks will be excluded
    • Improved HTML comment matching
  • Paragraphs only containing link reference definitions will be kept in the AST until the Document is finalized
    • (These were previously removed immediately after parsing the Paragraph)

Fixed

  • Fixed list tightness not being determined properly in some edge cases
  • Fixed incorrect ending line numbers for several block types in various scenarios
  • Fixed lowercase inline HTML declarations not being accepted

2.4.4 - 2024-07-22

Fixed

  • Fixed SmartPunct extension changing already-formatted quotation marks (#1030)

2.4.3 - 2024-07-22

Fixed

  • Fixed the Attributes extension not supporting CSS level 3 selectors (#1013)
  • Fixed UrlAutolinkParser incorrectly parsing text containing www anywhere before an autolink (#1025)

2.4.2 - 2024-02-02

Fixed

  • Fixed declaration parser being too strict
  • FencedCodeRenderer: don't add language- to class if already prefixed

2.4.1 - 2023-08-30

Fixed

  • Fixed ExternalLinkProcessor not fully disabling the rel attribute when configured to do so (#992)

2.4.0 - 2023-03-24

Added

  • Added generic CommonMarkException marker interface for all exceptions thrown by the library
  • Added several new specific exception types implementing that marker interface:
    • AlreadyInitializedException
    • InvalidArgumentException
    • IOException
    • LogicException
    • MissingDependencyException
    • NoMatchingRendererException
    • ParserLogicException
  • Added more configuration options to the Heading Permalinks extension (#939):
    • heading_permalink/apply_id_to_heading - When true, the id attribute will be applied to the heading element itself instead of the <a> tag
    • heading_permalink/heading_class - class to apply to the heading element
    • heading_permalink/insert - now accepts none to prevent the creation of the <a> link
  • Added new table/alignment_attributes configuration option to control how table cell alignment is rendered (#959)

Changed

  • Change several thrown exceptions from RuntimeException to LogicException (or something extending it), including:
    • CallbackGenerators that fail to set a URL or return an expected value
    • MarkdownParser when deactivating the last block parser or attempting to get an active block parser when they've all been closed
    • Adding items to an already-initialized Environment
    • Rendering a Node when no renderer has been registered for it
  • HeadingPermalinkProcessor now throws InvalidConfigurationException instead of RuntimeException when invalid config values are given.
  • HtmlElement::setAttribute() no longer requires the second parameter for boolean attributes
  • Several small micro-optimizations
  • Changed Strikethrough to only allow 1 or 2 tildes per the updated GFM spec

Fixed

  • Fixed inaccurate @throws docblocks throughout the codebase, including ConverterInterface, MarkdownConverter, and MarkdownConverterInterface.
    • These previously suggested that only \RuntimeExceptions were thrown, which was inaccurate as \LogicExceptions were also possible.

2.3.9 - 2023-02-15

Fixed

  • Fixed autolink extension not detecting some URIs with underscores (#956)

2.3.8 - 2022-12-10

Fixed

  • Fixed parsing issues when mb_internal_encoding() is set to something other than UTF-8 (#951)

2.3.7 - 2022-11-03

Fixed

  • Fixed TaskListItemMarkerRenderer not including HTML attributes set on the node by other extensions (#947)

2.3.6 - 2022-10-30

Fixed

  • Fixed unquoted attribute parsing when closing curly brace is followed by certain characters (like a .) (#943)

2.3.5 - 2022-07-29

Fixed

  • Fixed error using InlineParserEngine when no inline parsers are registered in the Environment (#908)

2.3.4 - 2022-07-17

Changed

  • Made a number of small tweaks to the embed extension's parsing behavior to fix #898:
    • Changed EmbedStartParser to always capture embed-like lines in container blocks, regardless of parent block type
    • Changed EmbedProcessor to also remove Embed blocks that aren't direct children of the Document
    • Increased the priority of EmbedProcessor to 1010

Fixed

  • Fixed EmbedExtension not parsing embeds following a list block (#898)

2.3.3 - 2022-06-07

Fixed

  • Fixed DomainFilteringAdapter not reindexing the embed list (#884, #885)

2.3.2 - 2022-06-03

Fixed

  • Fixed FootnoteExtension stripping extra characters from tab-indented footnotes (#881)

2.2.5 - 2022-06-03

Fixed

  • Fixed FootnoteExtension stripping extra characters from tab-indented footnotes (#881)

2.3.1 - 2022-05-14

Fixed

  • Fixed AutolinkExtension not ignoring trailing strikethrough syntax (#867)

2.2.4 - 2022-05-14

Fixed

  • Fixed AutolinkExtension not ignoring trailing strikethrough syntax (#867)

2.3.0 - 2022-04-07

Added

  • Added new EmbedExtension (#805)
  • Added DocumentRendererInterface as a replacement for the now-deprecated MarkdownRendererInterface

Deprecated

  • Deprecated MarkdownRendererInterface; use DocumentRendererInterface instead

2.2.3 - 2022-02-26

Fixed

  • Fixed front matter parsing with Windows line endings (#821)

2.1.3 - 2022-02-26

Fixed

  • Fixed front matter parsing with Windows line endings (#821)

2.0.4 - 2022-02-26

Fixed

  • Fixed front matter parsing with Windows line endings (#821)

2.2.2 - 2022-02-13

Fixed

  • Fixed double-escaping of image alt text (#806, #810)
  • Fixed Psalm typehints for event class names

2.2.1 - 2022-01-25

Fixed

  • Fixed symfony/deprecation-contracts constraint

Removed

  • Removed deprecation trigger from MarkdownConverterInterface to reduce noise

2.2.0 - 2022-01-22

Added

  • Added new ConverterInterface
  • Added new MarkdownToXmlConverter class
  • Added new HtmlDecorator class which can wrap existing renderers with additional HTML tags
  • Added new table/wrap config to apply an optional wrapping/container element around a table (#780)

Changed

  • HtmlElement contents can now consist of any Stringable, not just HtmlElement and string

Deprecated

  • Deprecated MarkdownConverterInterface and its convertToHtml() method; use ConverterInterface and convert() instead

2.1.2 - 2022-02-13

Fixed

  • Fixed double-escaping of image alt text (#806, #810)
  • Fixed Psalm typehints for event class names

2.1.1 - 2022-01-02

Added

  • Added missing return type to Environment::dispatch() to fix deprecation warning (#778)

2.1.0 - 2021-12-05

Added

  • Added support for ext-yaml in FrontMatterExtension (#715)
  • Added support for symfony/yaml v6.0 in FrontMatterExtension (#739)
  • Added new heading_permalink/aria_hidden config option (#741)

Fixed

  • Fixed PHP 8.1 deprecation warning (#759, #762)

2.0.3 - 2022-02-13

Fixed

  • Fixed double-escaping of image alt text (#806, #810)
  • Fixed Psalm typehints for event class names

2.0.2 - 2021-08-14

Changed

  • Bumped minimum version of league/config to support PHP 8.1

Fixed

  • Fixed ability to register block parsers that identify lines starting with letters (#706)

2.0.1 - 2021-07-31

Fixed

  • Fixed nested autolinks (#689)
  • Fixed description lists being parsed incorrectly (#692)
  • Fixed Table of Contents not respecting Heading Permalink prefixes (#690)

2.0.0 - 2021-07-24

No changes were introduced since the previous RC2 release. See all entries below for a list of changes between 1.x and 2.0.

2.0.0-rc2 - 2021-07-17

Fixed

  • Fixed Mentions inside of links creating nested links against the spec's rules (#688)

2.0.0-rc1 - 2021-07-10

No changes were introduced since the previous release.

2.0.0-beta3 - 2021-07-03

Changed

  • Any leading UTF-8 BOM will be stripped from the input
  • The getEnvironment() method of CommonMarkConverter and GithubFlavoredMarkdownConverter will always return the concrete, configurable Environment for upgrading convenience
  • Optimized AST iteration
  • Lots of small micro-optimizations

2.0.0-beta2 - 2021-06-27

Added

  • Added new Node::iterator() method and NodeIterator class for faster AST iteration (#683, #684)

Changed

  • Made compatible with CommonMark spec 0.30.0
  • Optimized link label parsing
  • Optimized AST iteration for a 50% performance boost in some event listeners (#683, #684)

Fixed

  • Fixed processing instructions with EOLs
  • Fixed case-insensitive matching for HTML tag types
  • Fixed type 7 HTML blocks incorrectly interrupting lazy paragraphs
  • Fixed newlines in reference labels not collapsing into spaces
  • Fixed link label normalization with escaped newlines
  • Fixed unnecessary AST iteration when no default attributes are configured

2.0.0-beta1 - 2021-06-20

Added

  • Added three new extensions:
  • Added new XmlRenderer to simplify AST debugging (see documentation) (#431)
  • Added the ability to configure disallowed raw HTML tags (#507)
  • Added the ability for Mentions to use multiple characters for their symbol (#514, #550)
  • Added the ability to delegate event dispatching to PSR-14 compliant event dispatcher libraries
  • Added new configuration options:
    • Added heading_permalink/min_heading_level and heading_permalink/max_heading_level options to control which headings get permalinks (#519)
    • Added heading_permalink/fragment_prefix to allow customizing the URL fragment prefix (#602)
    • Added footnote/backref_symbol option for customizing backreference link appearance (#522)
    • Added slug_normalizer/max_length option to control the maximum length of generated URL slugs
    • Added slug_normalizer/unique option to control whether unique slugs should be generated per-document or per-environment
  • Added purity markers throughout the codebase (verified with Psalm)
  • Added Query class to simplify Node traversal when looking to take action on certain Nodes
  • Added new HtmlFilter and StringContainerHelper utility classes
  • Added new AbstractBlockContinueParser class to simplify the creation of custom block parsers
  • Added several new classes and interfaces:
    • BlockContinue
    • BlockContinueParserInterface
    • BlockContinueParserWithInlinesInterface
    • BlockStart
    • BlockStartParserInterface
    • ChildNodeRendererInterface
    • ConfigurableExtensionInterface
    • CursorState
    • DashParser (extracted from PunctuationParser)
    • DelimiterParser
    • DocumentBlockParser
    • DocumentPreRenderEvent
    • DocumentRenderedEvent
    • EllipsesParser (extracted from PunctuationParser)
    • ExpressionInterface
    • FallbackNodeXmlRenderer
    • InlineParserEngineInterface
    • InlineParserMatch
    • MarkdownParserState
    • MarkdownParserStateInterface
    • MarkdownRendererInterface
    • Query
    • RawMarkupContainerInterface
    • ReferenceableInterface
    • RenderedContent
    • RenderedContentInterface
    • ReplaceUnpairedQuotesListener
    • SpecReader
    • TableOfContentsRenderer
    • UniqueSlugNormalizer
    • UniqueSlugNormalizerInterface
    • XmlRenderer
    • XmlNodeRendererInterface
  • Added several new methods:
    • Cursor::getCurrentCharacter()
    • Environment::createDefaultConfiguration()
    • Environment::setEventDispatcher()
    • EnvironmentInterface::getExtensions()
    • EnvironmentInterface::getInlineParsers()
    • EnvironmentInterface::getSlugNormalizer()
    • FencedCode::setInfo()
    • Heading::setLevel()
    • HtmlRenderer::renderDocument()
    • InlineParserContext::getFullMatch()
    • InlineParserContext::getFullMatchLength()
    • InlineParserContext::getMatches()
    • InlineParserContext::getSubMatches()
    • LinkParserHelper::parsePartialLinkLabel()
    • LinkParserHelper::parsePartialLinkTitle()
    • Node::assertInstanceOf()
    • RegexHelper::isLetter()
    • StringContainerInterface::setLiteral()
    • TableCell::getType()
    • TableCell::setType()
    • TableCell::getAlign()
    • TableCell::setAlign()

Changed

  • Changed the converter return type
    • CommonMarkConverter::convertToHtml() now returns an instance of RenderedContentInterface. This can be cast to a string for backward compatibility with 1.x.
  • Table of Contents items are no longer wrapped with <p> tags (#613)
  • Heading Permalinks now link to element IDs instead of using name attributes (#602)
  • Heading Permalink IDs and URL fragments now have a content prefix by default (#602)
  • Changes to configuration options:
    • enable_em has been renamed to commonmark/enable_em
    • enable_strong has been renamed to commonmark/enable_strong
    • use_asterisk has been renamed to commonmark/use_asterisk
    • use_underscore has been renamed to commonmark/use_underscore
    • unordered_list_markers has been renamed to commonmark/unordered_list_markers
    • mentions/*/symbol has been renamed to mentions/*/prefix
    • mentions/*/regex has been renamed to mentions/*/pattern and requires partial regular expressions (without delimiters or flags)
    • max_nesting_level now defaults to PHP_INT_MAX and no longer supports floats
    • heading_permalink/slug_normalizer has been renamed to slug_normalizer/instance
  • Event dispatching is now fully PSR-14 compliant
  • Moved and renamed several classes - see the full list here
  • The HeadingPermalinkExtension and FootnoteExtension were modified to ensure they never produce a slug which conflicts with slugs created by the other extension
  • SlugNormalizer::normalizer() now supports optional prefixes and max length options passed in via the $context argument
  • The AbstractBlock::$data and AbstractInline::$data arrays were replaced with a Data array-like object on the base Node class
  • Implemented a new approach to block parsing. This was a massive change, so here are the highlights:
    • Functionality previously found in block parsers and node elements has moved to block parser factories and block parsers, respectively (more details)
    • ConfigurableEnvironmentInterface::addBlockParser() is now EnvironmentBuilderInterface::addBlockParserFactory()
    • ReferenceParser was re-implemented and works completely different than before
    • The paragraph parser no longer needs to be added manually to the environment
  • Implemented a new approach to inline parsing where parsers can now specify longer strings or regular expressions they want to parse (instead of just single characters):
    • InlineParserInterface::getCharacters() is now getMatchDefinition() and returns an instance of InlineParserMatch
    • InlineParserContext::__construct() now requires the contents to be provided as a Cursor instead of a string
  • Implemented delimiter parsing as a special type of inline parser (via the new DelimiterParser class)
  • Changed block and inline rendering to use common methods and interfaces
    • BlockRendererInterface and InlineRendererInterface were replaced by NodeRendererInterface with slightly different parameters. All core renderers now implement this interface.
    • ConfigurableEnvironmentInterface::addBlockRenderer() and addInlineRenderer() were combined into EnvironmentBuilderInterface::addRenderer()
    • EnvironmentInterface::getBlockRenderersForClass() and getInlineRenderersForClass() are now just getRenderersForClass()
  • Completely refactored the Configuration implementation
    • All configuration-specific classes have been moved into a new league/config package with a new namespace
    • Configuration objects must now be configured with a schema and all options must match that schema - arbitrary keys are no longer permitted
    • Configuration::__construct() no longer accepts the default configuration values - use Configuration::merge() instead
    • ConfigurationInterface now only contains a get(string $key); this method no longer allows arbitrary default values to be returned if the option is missing
    • ConfigurableEnvironmentInterface was renamed to EnvironmentBuilderInterface
    • ExtensionInterface::register() now requires an EnvironmentBuilderInterface param instead of ConfigurableEnvironmentInterface
  • Added missing return types to virtually every class and interface method
  • Re-implemented the GFM Autolink extension using the new inline parser approach instead of document processors
    • EmailAutolinkProcessor is now EmailAutolinkParser
    • UrlAutolinkProcessor is now UrlAutolinkParser
  • HtmlElement can now properly handle array (i.e. class) and boolean (i.e. checked) attribute values
  • HtmlElement automatically flattens any attributes with array values into space-separated strings, removing duplicate entries
  • Combined separate classes/interfaces into one:
    • DisallowedRawHtmlRenderer replaces DisallowedRawHtmlBlockRenderer and DisallowedRawHtmlInlineRenderer
    • NodeRendererInterface replaces BlockRendererInterface and InlineRendererInterface
  • Renamed the following methods:
    • Environment and ConfigurableEnvironmentInterface:
      • addBlockParser() is now addBlockStartParser()
    • ReferenceMap and ReferenceMapInterface:
      • addReference() is now add()
      • getReference() is now get()
      • listReferences() is now getIterator()
    • Various node (block/inline) classes:
      • getContent() is now getLiteral()
      • setContent() is now setLiteral()
  • Moved and renamed the following constants:
    • EnvironmentInterface::HTML_INPUT_ALLOW is now HtmlFilter::ALLOW
    • EnvironmentInterface::HTML_INPUT_ESCAPE is now HtmlFilter::ESCAPE
    • EnvironmentInterface::HTML_INPUT_STRIP is now HtmlFilter::STRIP
    • TableCell::TYPE_HEAD is now TableCell::TYPE_HEADER
    • TableCell::TYPE_BODY is now TableCell::TYPE_DATA
  • Changed the visibility of the following properties:
    • AttributesInline::$attributes is now private
    • AttributesInline::$block is now private
    • TableCell::$align is now private
    • TableCell::$type is now private
    • TableSection::$type is now private
  • Several methods which previously returned $this now return void
    • Delimiter::setPrevious()
    • Node::replaceChildren()
    • Context::setTip()
    • Context::setContainer()
    • Context::setBlocksParsed()
    • AbstractStringContainer::setContent()
    • AbstractWebResource::setUrl()
  • Several classes are now marked final:
    • ArrayCollection
    • Emphasis
    • FencedCode
    • Heading
    • HtmlBlock
    • HtmlElement
    • HtmlInline
    • IndentedCode
    • Newline
    • Strikethrough
    • Strong
    • Text
  • Heading nodes no longer directly contain a copy of their inner text
  • StringContainerInterface can now be used for inlines, not just blocks
  • ArrayCollection only supports integer keys
  • HtmlElement now implements Stringable
  • Cursor::saveState() and Cursor::restoreState() now use CursorState objects instead of arrays
  • NodeWalker::next() now enters, traverses any children, and leaves all elements which may have children (basically all blocks plus any inlines with children). Previously, it only did this for elements explicitly marked as "containers".
  • InvalidOptionException was removed
  • Anything with a getReference(): ReferenceInterface method now implements ReferencableInterface
  • The SmartPunct extension now replaces all unpaired Quote elements with Text elements towards the end of parsing, making the QuoteRenderer unnecessary
  • Several changes made to the Footnote extension:
    • Footnote identifiers can no longer contain spaces
    • Anonymous footnotes can now span subsequent lines
    • Footnotes can now contain multiple lines of content, including sub-blocks, by indenting them
    • Footnote event listeners now have numbered priorities (but still execute in the same order)
    • Footnotes must now be separated from previous content by a blank line
  • The line numbers (keys) returned via MarkdownInput::getLines() now start at 1 instead of 0
  • DelimiterProcessorCollectionInterface now extends Countable
  • RegexHelper::PARTIAL_ constants must always be used in case-insensitive contexts
  • HeadingPermalinkProcessor no longer accepts text normalizers via the constructor - these must be provided via configuration instead
  • Blocks which can't contain inlines will no longer be asked to render inlines
  • AnonymousFootnoteRefParser and HeadingPermalinkProcessor now implement EnvironmentAwareInterface instead of ConfigurationAwareInterface
  • The second argument to TextNormalizerInterface::normalize() must now be an array
  • The title attribute for Link and Image nodes is now stored using a dedicated property instead of stashing it in $data
  • ListData::$delimiter now returns either ListBlock::DELIM_PERIOD or ListBlock::DELIM_PAREN instead of the literal delimiter

Fixed

  • Fixed parsing of footnotes without content
  • Fixed rendering of orphaned footnotes and footnote refs
  • Fixed some URL autolinks breaking too early (#492)
  • Fixed AbstractStringContainer not actually being abstract

Removed

  • Removed support for PHP 7.1, 7.2, and 7.3 (#625, #671)
  • Removed all previously-deprecated functionality:
    • Removed the ability to pass custom Environment instances into the CommonMarkConverter and GithubFlavoredMarkdownConverter constructors
    • Removed the Converter class and ConverterInterface
    • Removed the bin/commonmark script
    • Removed the Html5Entities utility class
    • Removed the InlineMentionParser (use MentionParser instead)
    • Removed DefaultSlugGenerator and SlugGeneratorInterface from the Extension/HeadingPermalink/Slug sub-namespace (use the new ones under ./SlugGenerator instead)
    • Removed the following ArrayCollection methods:
      • add()
      • set()
      • get()
      • remove()
      • isEmpty()
      • contains()
      • indexOf()
      • containsKey()
      • replaceWith()
      • removeGaps()
    • Removed the ConfigurableEnvironmentInterface::setConfig() method
    • Removed the ListBlock::TYPE_UNORDERED constant
    • Removed the CommonMarkConverter::VERSION constant
    • Removed the HeadingPermalinkRenderer::DEFAULT_INNER_CONTENTS constant
    • Removed the heading_permalink/inner_contents configuration option
  • Removed now-unused classes:
    • AbstractStringContainerBlock
    • BlockRendererInterface
    • Context
    • ContextInterface
    • Converter
    • ConverterInterface
    • InlineRendererInterface
    • PunctuationParser (was split into two classes: DashParser and EllipsesParser)
    • QuoteRenderer
    • UnmatchedBlockCloser
  • Removed the following methods, properties, and constants:
    • AbstractBlock::$open
    • AbstractBlock::$lastLineBlank
    • AbstractBlock::isContainer()
    • AbstractBlock::canContain()
    • AbstractBlock::isCode()
    • AbstractBlock::matchesNextLine()
    • AbstractBlock::endsWithBlankLine()
    • AbstractBlock::setLastLineBlank()
    • AbstractBlock::shouldLastLineBeBlank()
    • AbstractBlock::isOpen()
    • AbstractBlock::finalize()
    • AbstractBlock::getData()
    • AbstractInline::getData()
    • ConfigurableEnvironmentInterface::addBlockParser()
    • ConfigurableEnvironmentInterface::mergeConfig()
    • Delimiter::setCanClose()
    • EnvironmentInterface::getConfig()
    • EnvironmentInterface::getInlineParsersForCharacter()
    • EnvironmentInterface::getInlineParserCharacterRegex()
    • HtmlRenderer::renderBlock()
    • HtmlRenderer::renderBlocks()
    • HtmlRenderer::renderInline()
    • HtmlRenderer::renderInlines()
    • Node::isContainer()
    • RegexHelper::matchAll() (use the new matchFirst() method instead)
    • RegexHelper::REGEX_WHITESPACE
  • Removed the second $contents argument from the Heading constructor

Deprecated

The following things have been deprecated and will not be supported in v3.0:

  • Environment::mergeConfig() (set configuration before instantiation instead)
  • Environment::createCommonMarkEnvironment() and Environment::createGFMEnvironment()
    • Alternative 1: Use CommonMarkConverter or GithubFlavoredMarkdownConverter if you don't need to customize the environment
    • Alternative 2: Instantiate a new Environment and add the necessary extensions yourself