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Edit File : CHANGELOG.md \| Size : 19.65 KB
# Change Log All notable changes to this project will be documented in this file. Updates should follow the [Keep a CHANGELOG](https://keepachangelog.com/) principles. ## [Unreleased][unreleased] ## [1.6.6] - 2021-07-17 ### Fixed - Fixed Mentions inside of links creating nested links against the spec's rules (#688) ## [1.6.5] - 2021-06-26 ### Changed - Simplified checks for thematic breaks ### Fixed - Fixed ExternalLinkProcessor not handling autolinks by adjusting its priority to -50 (#681) ## [1.6.4] - 2021-06-19 ### Changed - Optimized attribute parsing to avoid inspecting every space character (30% performance boost) ## [1.6.3] - 2021-06-19 ### Fixed - Fixed incorrect parsing of tilde-fenced code blocks with leading spaces (#676) ## [1.6.2] - 2021-05-12 ### Fixed - Fixed incorrect error level for deprecation notices ## [1.6.1] - 2021-05-08 ### Fixed - Fixed `HeadingPermalinkProcessor` skipping text contents from certain nodes (#615) ## [1.6.0] - 2021-05-01 ### Added - Added forward-compatibility for [configuration options which will be changing in 2.0](https://commonmark.thephpleague.com/1.6/upgrading/): - `commonmark/enable_em` (currently `enable_em` in 1.x) - `commonmark/enable_strong` (currently `enable_strong` in 1.x) - `commonmark/use_asterisk` (currently `use_asterisk` in 1.x) - `commonmark/use_underscore` (currently `use_underscore` in 1.x) - `commonmark/unordered_list_markers` (currently `unordered_list_markers` in 1.x) - `mentions//prefix` (currently `mentions//symbol` in 1.x) - `mentions//pattern` (currently `mentions//regex` in 1.x) - `max_nesting_level` (currently supports `int` and `float` values in 1.x; will only support `int` in 2.0) - Added new `MarkdownConverter` class for creating converters with custom environments; this replaces the previously-deprecated `Converter` class - Added new `RegexHelper::matchFirst()` method - Added new `Configuration::exists()` method ### Changed - The `max_nesting_level` option now defaults to `PHP_INT_MAX` instead of `INF` ### Deprecated - Deprecated the [configuration options shown above](https://commonmark.thephpleague.com/1.6/upgrading/) - Deprecated the ability to pass a custom `Environment` into the constructors of `CommonMarkConverter` and `GithubFlavoredMarkdownConverter`; use `MarkdownConverter` instead - Deprecated `ConfigurableEnvironmentInterface::setConfig()`; use `mergeConfig()` instead - Deprecated calling `ConfigurableEnvironmentInterface::mergeConfig()` without any parameters - Deprecated calling `Configuration::get()` and `EnvironmentInterface::getConfig()` without any parameters - Deprecated calling `Configuration::set()` without the second `$value` parameter - Deprecated `RegexHelper::matchAll()`; use `RegexHelper::matchFirst()` instead - Deprecated extending the `ArrayCollection` class; will be marked `final` in 2.0 ### Fixed - Fixed missing check for empty arrays being passed into the `unordered_list_markers` configuration option ## [1.5.8] - 2021-03-28 ### Fixed - Fixed Table of Contents not rendering heading inlines properly (#587, #588) - Fixed parsing of tables within list items (#590) ## [1.5.7] - 2020-10-31 ### Fixed - Fixed mentions not being parsed when appearing after non-word characters (#582) ## [1.5.6] - 2020-10-17 ### Changed - Blocks added outside of the parsing context now have their start/end line numbers defaulted to 0 to avoid type errors (#579) ### Fixed - Fixed replacement blocks not inheriting the start line number of the container they're replacing (#579) - Fixed Table of Contents blocks not having correct start/end line numbers (#579) ## [1.5.5] - 2020-09-13 ### Changed - Bumped CommonMark spec compliance to 0.28.2 ### Fixed - Fixed `textarea` elements not being treated as a type 1 HTML block (like `script`, `style`, or `pre`) - Fixed autolink processor not handling other unmatched trailing parentheses ## [1.5.4] - 2020-08-17 ### Fixed - Fixed footnote ID configuration not taking effect (#524, #530) - Fixed heading permalink slugs not being unique (#531, #534) ## [1.5.3] - 2020-07-19 ### Fixed - Fixed regression of multi-byte inline parser characters not being matched ## [1.5.2] - 2020-07-19 ### Changed - Significantly improved performance of the inline parser regex ### Fixed - Fixed parent class lookups for non-existent classes on PHP 8 (#517) ## [1.5.1] - 2020-06-27 ### Fixed - Fixed UTF-8 encoding not being checked in the `UrlEncoder` utility (#509) or the `Cursor` ## [1.5.0] - 2020-06-21 ### Added - Added new `AttributesExtension` based on <https://github.com/webuni/commonmark-attributes-extension> (#474) - Added new `FootnoteExtension` based on <https://github.com/rezozero/commonmark-ext-footnotes> (#474) - Added new `MentionExtension` to replace `InlineMentionParser` with more flexibility and customization - Added the ability to render `TableOfContents` nodes anywhere in a document (given by a placeholder) - Added the ability to properly clone `Node` objects - Added options to customize the value of `rel` attributes set via the `ExternalLink` extension (#476) - Added a new `heading_permalink/slug_normalizer` configuration option to allow custom slug generation (#460) - Added a new `heading_permalink/symbol` configuration option to replace the now deprecated `heading_permalink/inner_contents` configuration option (#505) - Added `SlugNormalizer` and `TextNormalizer` classes to make normalization reusable by extensions (#485) - Added new classes: - `TableOfContentsGenerator` - `TableOfContentsGeneratorInterface` - `TableOfContentsPlaceholder` - `TableOfContentsPlaceholderParser` - `TableOfContentsPlaceholderRenderer` ### Changed - "Moved" the `TableOfContents` class into a new `Node` sub-namespace (with backward-compatibility) - Reference labels are now generated and stored in lower-case instead of upper-case - Reference labels are no longer normalized inside the `Reference`, only the `ReferenceMap` ### Fixed - Fixed reference label case folding polyfill not being consistent between different PHP versions ### Deprecated - Deprecated the `CommonMarkConverter::VERSION` constant (#496) - Deprecated `League\CommonMark\Extension\Autolink\InlineMentionParser` (use `League\CommonMark\Extension\Mention\MentionParser` instead) - Deprecated everything under `League\CommonMark\Extension\HeadingPermalink\Slug` (use the classes under `League\CommonMark\Normalizer` instead) - Deprecated `League\CommonMark\Extension\TableOfContents\TableOfContents` (use the one in the new `Node` sub-namespace instead) - Deprecated the `STYLE_` and `NORMALIZE_` constants in `TableOfContentsBuilder` (use the ones in `TableOfContentsGenerator` instead) - Deprecated the `\League\CommonMark\Extension\HeadingPermalink\HeadingPermalinkRenderer::DEFAULT_INNER_CONTENTS` constant (#505) - Deprecated the `heading_permalink/inner_contents` configuration option in the `HeadingPermalink` extension (use the new `heading_permalink/symbol` configuration option instead) (#505) ## [1.4.3] - 2020-05-04 ### Fixed - Fixed certain Unicode letters, numbers, and marks not being preserved when generating URL slugs (#467) ## [1.4.2] - 2020-04-24 ### Fixed - Fixed inline code blocks not be included within heading permalinks (#457) ## [1.4.1] - 2020-04-20 ### Fixed - Fixed BC break caused by ConverterInterface alias not being used by some DI containers (#454) ## [1.4.0] - 2020-04-18 ### Added - Added new [Heading Permalink extension](https://commonmark.thephpleague.com/extensions/heading-permalinks/) (#420) - Added new [Table of Contents extension](https://commonmark.thephpleague.com/extensions/table-of-contents/) (#441) - Added new `MarkdownConverterInterface` as a long-term replacement for `ConverterInterface` (#439) - Added new `DocumentPreParsedEvent` event (#427, #359, #399) - Added new `ListBlock::TYPE_BULLET` constant as a replacement for `ListBlock::TYPE_UNORDERED` - Added new `MarkdownInput` class and `MarkdownInputInterface` to handle pre-parsing and allow listeners to replace Markdown contents ### Changed - Block & inline renderers will now render child classes automatically (#222, #209) - The `ListBlock` constants now use fully-lowercased values instead of titlecased values - Significantly improved typing ### Fixed - Fixed loose comparison when checking for table alignment - Fixed `StaggeredDelimiterProcessor` returning from a `void` function ### Deprecated - The `Converter` class has been deprecated; use `CommonMarkConverter` instead (#438, #439) - The `ConverterInterface` has been deprecated; use `MarkdownConverterInterface` instead (#438, #439) - The `bin/commonmark` script has been deprecated - The following methods of `ArrayCollection` have been deprecated: - `add()` - `set()` - `get()` - `remove()` - `isEmpty()` - `contains()` - `indexOf()` - `containsKey()` - `replaceWith()` - `removeGaps()` - The `ListBlock::TYPE_UNORDERED` constant has been deprecated, use `ListBlock::TYPE_BULLET` instead ## [1.3.4] - 2020-04-13 ### Fixed - Fixed configuration/environment not being injected into event listeners when adding them via `[$instance, 'method']` callable syntax (#440) ## [1.3.3] - 2020-04-05 ### Fixed - Fixed event listeners not having the environment or configuration injected if they implemented the `EnvironmentAwareInterface` or `ConfigurationAwareInterface` (#423) ## [1.3.2] - 2020-03-25 ### Fixed - Optimized URL normalization in cases where URLs don't contain special characters (#417, #418) ## [1.3.1] - 2020-02-28 ### Fixed - Fixed return types of `Environment::createCommonMarkEnvironment()` and `Environment::createGFMEnvironment()` ## [1.3.0] - 2020-02-08 ### Added - Added (optional) full GFM support! 🎉🎉🎉 (#409) - Added check to ensure Markdown input is valid UTF-8 (#401, #405) - Added new `unordered_list_markers` configuration option (#408, #411) ### Changed - Introduced several micro-optimizations for a 5-10% performance boost ## [1.2.2] - 2020-01-15 This release contains the same changes as 1.1.3: ### Fixed - Fixed link parsing edge case (#403) ## [1.1.3] - 2020-01-15 ### Fixed - Fixed link parsing edge case (#403) ## [1.2.1] - 2020-01-14 ### Changed - Introduced several micro-optimizations, reducing the parse time by 8% ## [1.2.0] - 2020-01-09 ### Changed - Removed URL decoding step before encoding (more performant and better matches the JS library) - Removed redundant token from HTML tag regex ## [1.1.2] - 2019-12-09 ### Fixed - Fixed URL normalization not handling non-UTF-8 sequences properly (#395, #396) ## [1.1.1] - 2019-11-11 ### Fixed - Fixed handling of link destinations with unbalanced unescaped parens - Fixed adding delimiters to stack which can neither open nor close a run ## [1.1.0] - 2019-10-31 ### Added - Added a new `Html5EntityDecoder` class (#387) ### Changed - Improved performance by 10% (#389) - Made entity decoding less memory-intensive (#386, #387) ### Fixed - Fixed PHP 7.4 compatibility issues ### Deprecated - Deprecated the `Html5Entities` class - use `Html5EntityDecoder` instead (#387) ## [1.0.0] - 2019-06-29 No changes were made since 1.0.0-rc1. ## [1.0.0-rc1] - 2019-06-19 ### Added - Extracted a `ReferenceMapInterface` from the `ReferenceMap` class - Added optional `ReferenceMapInterface` parameter to the `Document` constructor ### Changed - Replaced all references to `ReferenceMap` with `ReferenceMapInterface` - `ReferenceMap::addReference()` no longer returns `$this` ### Fixed - Fixed bug where elements with content of `"0"` wouldn't be rendered (#376) ## [1.0.0-beta4] - 2019-06-05 ### Added - Added event dispatcher functionality (#359, #372) ### Removed - Removed `DocumentProcessorInterface` functionality in favor of event dispatching (#373) ## [1.0.0-beta3] - 2019-05-27 ### Changed - Made the `Delimiter` class final and extracted a new `DelimiterInterface` - Modified most external usages to use this new interface - Renamed three `Delimiter` methods: - `getOrigDelims()` renamed to `getOriginalLength()` - `getNumDelims()` renamed to `getLength()` - `setNumDelims()` renamed to `setLength()` - Made additional classes final: - `DelimiterStack` - `ReferenceMap` - `ReferenceParser` - Moved `ReferenceParser` into the `Reference` sub-namespace ### Removed - Removed unused `Delimiter` methods: - `setCanOpen()` - `setCanClose()` - `setChar()` - `setIndex()` - `setInlineNode()` - Removed fluent interface from `Delimiter` (setter methods now have no return values) ## [1.0.0-beta2] - 2019-05-27 ### Changed - `DelimiterProcessorInterface::process()` will accept any type of `AbstractStringContainer` now, not just `Text` nodes - The `Delimiter` constructor, `getInlineNode()`, and `setInlineNode()` no longer accept generic `Node` elements - only `AbstractStringContainer`s ### Removed - Removed all deprecated functionality: - The `safe` option (use `html_input` and `allow_unsafe_links` options instead) - All deprecated `RegexHelper` constants - `DocParser::getEnvironment()` (you should obtain it some other way) - `AbstractInlineContainer` (use `AbstractInline` instead and make `isContainer()` return `true`) ## [1.0.0-beta1] - 2019-05-26 ### Added - Added proper support for delimiters, including custom delimiters - `addDelimiterProcessor()` added to `ConfigurableEnvironmentInterface` and `Environment` - Basic delimiters no longer need custom parsers - they'll be parsed automatically - Added new methods: - `AdjacentTextMerger::mergeTextNodesBetweenExclusive()` - `CommonMarkConveter::getEnvironment()` - `Configuration::set()` - Extracted some new interfaces from base classes: - `DocParserInterface` created from `DocParser` - `ConfigurationInterface` created from `Configuration` - `ReferenceInterface` created from `Reference` ### Changed - Renamed several methods of the `Configuration` class: - `getConfig()` renamed to `get()` - `mergeConfig()` renamed to `merge()` - `setConfig()` renamed to `replace()` - Changed `ConfigurationAwareInterface::setConfiguration()` to accept the new `ConfigurationInterface` instead of the concrete class - Renamed the `AdjoiningTextCollapser` class to `AdjacentTextMerger` - Replaced its `collapseTextNodes()` method with the new `mergeChildNodes()` method - Made several classes `final`: - `Configuration` - `DocParser` - `HtmlRenderer` - `InlineParserEngine` - `NodeWalker` - `Reference` - All of the block/inline parsers and renderers - Reduced visibility of several internal methods to `private`: - `DelimiterStack::findEarliest()` - All `protected` methods in `InlineParserEngine` - Marked some classes and methods as `@internal` - `ElementRendererInterface` now requires a public `renderInline()` method; added this to `HtmlRenderer` - Changed `InlineParserEngine::parse()` to require an `AbstractStringContainerBlock` instead of the generic `Node` class - Un-deprecated the `CommonmarkConverter::VERSION` constant - The `Converter` constructor now requires an instance of `DocParserInterface` instead of the concrete `DocParser` - Changed `Emphasis`, `Strong`, and `AbstractWebResource` to directly extend `AbstractInline` instead of the (now-deprecated) intermediary `AbstractInlineContainer` class ### Fixed - Fixed null errors when inserting sibling `Node`s without parents - Fixed `NodeWalkerEvent` not requiring a `Node` via its constructor - Fixed `Reference::normalizeReference()` improperly converting to uppercase instead of performing proper Unicode case-folding - Fixed strong emphasis delimiters not being preserved when `enable_strong` is set to `false` (it now works identically to `enable_em`) ### Deprecated - Deprecated `DocParser::getEnvironment()` (you should obtain it some other way) - Deprecated `AbstractInlineContainer` (use `AbstractInline` instead and make `isContainer()` return `true`) ### Removed - Removed inline processor functionality now that we have proper delimiter support: - Removed `addInlineProcessor()` from `ConfigurableEnvironmentInterface` and `Environment` - Removed `getInlineProcessors()` from `EnvironmentInterface` and `Environment` - Removed `EmphasisProcessor` - Removed `InlineProcessorInterface` - Removed `EmphasisParser` now that we have proper delimiter support - Removed support for non-UTF-8-compatible encodings - Removed `getEncoding()` from `ContextInterface` - Removed `getEncoding()`, `setEncoding()`, and `$encoding` from `Context` - Removed `getEncoding()` and the second `$encoding` constructor param from `Cursor` - Removed now-unused methods - Removed `DelimiterStack::getTop()` (no replacement) - Removed `DelimiterStack::iterateByCharacters()` (use the new `processDelimiters()` method instead) - Removed the protected `DelimiterStack::findMatchingOpener()` method [unreleased]: https://github.com/thephpleague/commonmark/compare/1.6.6...1.6 [1.6.6]: https://github.com/thephpleague/commonmark/compare/1.6.5...1.6.6 [1.6.5]: https://github.com/thephpleague/commonmark/compare/1.6.4...1.6.5 [1.6.4]: https://github.com/thephpleague/commonmark/compare/1.6.3...1.6.4 [1.6.3]: https://github.com/thephpleague/commonmark/compare/1.6.2...1.6.3 [1.6.2]: https://github.com/thephpleague/commonmark/compare/1.6.1...1.6.2 [1.6.1]: https://github.com/thephpleague/commonmark/compare/1.6.0...1.6.1 [1.6.0]: https://github.com/thephpleague/commonmark/compare/1.5.8...1.6.0 [1.5.8]: https://github.com/thephpleague/commonmark/compare/1.5.7...1.5.8 [1.5.7]: https://github.com/thephpleague/commonmark/compare/1.5.6...1.5.7 [1.5.6]: https://github.com/thephpleague/commonmark/compare/1.5.5...1.5.6 [1.5.5]: https://github.com/thephpleague/commonmark/compare/1.5.4...1.5.5 [1.5.4]: https://github.com/thephpleague/commonmark/compare/1.5.3...1.5.4 [1.5.3]: https://github.com/thephpleague/commonmark/compare/1.5.2...1.5.3 [1.5.2]: https://github.com/thephpleague/commonmark/compare/1.5.1...1.5.2 [1.5.1]: https://github.com/thephpleague/commonmark/compare/1.5.0...1.5.1 [1.5.0]: https://github.com/thephpleague/commonmark/compare/1.4.3...1.5.0 [1.4.3]: https://github.com/thephpleague/commonmark/compare/1.4.2...1.4.3 [1.4.2]: https://github.com/thephpleague/commonmark/compare/1.4.1...1.4.2 [1.4.1]: https://github.com/thephpleague/commonmark/compare/1.4.0...1.4.1 [1.4.0]: https://github.com/thephpleague/commonmark/compare/1.3.4...1.4.0 [1.3.4]: https://github.com/thephpleague/commonmark/compare/1.3.3...1.3.4 [1.3.3]: https://github.com/thephpleague/commonmark/compare/1.3.2...1.3.3 [1.3.2]: https://github.com/thephpleague/commonmark/compare/1.3.1...1.3.2 [1.3.1]: https://github.com/thephpleague/commonmark/compare/1.3.0...1.3.1 [1.3.0]: https://github.com/thephpleague/commonmark/compare/1.2.2...1.3.0 [1.2.2]: https://github.com/thephpleague/commonmark/compare/1.2.1...1.2.2 [1.2.1]: https://github.com/thephpleague/commonmark/compare/1.2.0...1.2.1 [1.2.0]: https://github.com/thephpleague/commonmark/compare/1.1.2...1.2.0 [1.1.3]: https://github.com/thephpleague/commonmark/compare/1.1.2...1.1.3 [1.1.2]: https://github.com/thephpleague/commonmark/compare/1.1.1...1.1.2 [1.1.1]: https://github.com/thephpleague/commonmark/compare/1.1.0...1.1.1 [1.1.0]: https://github.com/thephpleague/commonmark/compare/1.0.0...1.1.0 [1.0.0]: https://github.com/thephpleague/commonmark/compare/1.0.0-rc1...1.0.0 [1.0.0-rc1]: https://github.com/thephpleague/commonmark/compare/1.0.0-beta4...1.0.0-rc1 [1.0.0-beta4]: https://github.com/thephpleague/commonmark/compare/1.0.0-beta3...1.0.0-beta4 [1.0.0-beta3]: https://github.com/thephpleague/commonmark/compare/1.0.0-beta2...1.0.0-beta3 [1.0.0-beta2]: https://github.com/thephpleague/commonmark/compare/1.0.0-beta1...1.0.0-beta2 [1.0.0-beta1]: https://github.com/thephpleague/commonmark/compare/0.19.2...1.0.0-beta1 Back

Edit File : CHANGELOG.md | Size : 19.65 KB

# Change Log
All notable changes to this project will be documented in this file.
Updates should follow the [Keep a CHANGELOG](https://keepachangelog.com/) principles.

## [Unreleased][unreleased]

## [1.6.6] - 2021-07-17

### Fixed

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

## [1.6.5] - 2021-06-26

### Changed

- Simplified checks for thematic breaks

### Fixed

- Fixed ExternalLinkProcessor not handling autolinks by adjusting its priority to -50 (#681)

## [1.6.4] - 2021-06-19

### Changed

- Optimized attribute parsing to avoid inspecting every space character (30% performance boost)

## [1.6.3] - 2021-06-19

### Fixed

- Fixed incorrect parsing of tilde-fenced code blocks with leading spaces (#676)

## [1.6.2] - 2021-05-12

### Fixed

- Fixed incorrect error level for deprecation notices

## [1.6.1] - 2021-05-08

### Fixed

- Fixed `HeadingPermalinkProcessor` skipping text contents from certain nodes (#615)

## [1.6.0] - 2021-05-01

### Added

- Added forward-compatibility for [configuration options which will be changing in 2.0](https://commonmark.thephpleague.com/1.6/upgrading/):
   - `commonmark/enable_em` (currently `enable_em` in 1.x)
   - `commonmark/enable_strong` (currently `enable_strong` in 1.x)
   - `commonmark/use_asterisk` (currently `use_asterisk` in 1.x)
   - `commonmark/use_underscore` (currently `use_underscore` in 1.x)
   - `commonmark/unordered_list_markers` (currently `unordered_list_markers` in 1.x)
   - `mentions/*/prefix` (currently `mentions/*/symbol` in 1.x)
   - `mentions/*/pattern` (currently `mentions/*/regex` in 1.x)
   - `max_nesting_level` (currently supports `int` and `float` values in 1.x; will only support `int` in 2.0)
 - Added new `MarkdownConverter` class for creating converters with custom environments; this replaces the previously-deprecated `Converter` class
 - Added new `RegexHelper::matchFirst()` method
 - Added new `Configuration::exists()` method

### Changed

- The `max_nesting_level` option now defaults to `PHP_INT_MAX` instead of `INF`

### Deprecated

- Deprecated the [configuration options shown above](https://commonmark.thephpleague.com/1.6/upgrading/)
 - Deprecated the ability to pass a custom `Environment` into the constructors of `CommonMarkConverter` and `GithubFlavoredMarkdownConverter`; use `MarkdownConverter` instead
 - Deprecated `ConfigurableEnvironmentInterface::setConfig()`; use `mergeConfig()` instead
 - Deprecated calling `ConfigurableEnvironmentInterface::mergeConfig()` without any parameters
 - Deprecated calling `Configuration::get()` and `EnvironmentInterface::getConfig()` without any parameters
 - Deprecated calling `Configuration::set()` without the second `$value` parameter
 - Deprecated `RegexHelper::matchAll()`; use `RegexHelper::matchFirst()` instead
 - Deprecated extending the `ArrayCollection` class; will be marked `final` in 2.0

### Fixed

- Fixed missing check for empty arrays being passed into the `unordered_list_markers` configuration option

## [1.5.8] - 2021-03-28

### Fixed

- Fixed Table of Contents not rendering heading inlines properly (#587, #588)
 - Fixed parsing of tables within list items (#590)

## [1.5.7] - 2020-10-31

### Fixed

- Fixed mentions not being parsed when appearing after non-word characters (#582)

## [1.5.6] - 2020-10-17

### Changed

- Blocks added outside of the parsing context now have their start/end line numbers defaulted to 0 to avoid type errors (#579)

### Fixed

- Fixed replacement blocks not inheriting the start line number of the container they're replacing (#579)
 - Fixed Table of Contents blocks not having correct start/end line numbers (#579)

## [1.5.5] - 2020-09-13

### Changed

- Bumped CommonMark spec compliance to 0.28.2

### Fixed

- Fixed `textarea` elements not being treated as a type 1 HTML block (like `script`, `style`, or `pre`)
 - Fixed autolink processor not handling other unmatched trailing parentheses

## [1.5.4] - 2020-08-17

### Fixed

- Fixed footnote ID configuration not taking effect (#524, #530)
 - Fixed heading permalink slugs not being unique (#531, #534)

## [1.5.3] - 2020-07-19

### Fixed

- Fixed regression of multi-byte inline parser characters not being matched

## [1.5.2] - 2020-07-19

### Changed

- Significantly improved performance of the inline parser regex

### Fixed

- Fixed parent class lookups for non-existent classes on PHP 8 (#517)

## [1.5.1] - 2020-06-27

### Fixed

- Fixed UTF-8 encoding not being checked in the `UrlEncoder` utility (#509) or the `Cursor`

## [1.5.0] - 2020-06-21

### Added

- Added new `AttributesExtension` based on <https://github.com/webuni/commonmark-attributes-extension> (#474)
 - Added new `FootnoteExtension` based on <https://github.com/rezozero/commonmark-ext-footnotes> (#474)
 - Added new `MentionExtension` to replace `InlineMentionParser` with more flexibility and customization
 - Added the ability to render `TableOfContents` nodes anywhere in a document (given by a placeholder)
 - Added the ability to properly clone `Node` objects
 - Added options to customize the value of `rel` attributes set via the `ExternalLink` extension (#476)
 - Added a new `heading_permalink/slug_normalizer` configuration option to allow custom slug generation (#460)
 - Added a new `heading_permalink/symbol` configuration option to replace the now deprecated `heading_permalink/inner_contents` configuration option (#505)
 - Added `SlugNormalizer` and `TextNormalizer` classes to make normalization reusable by extensions (#485)
 - Added new classes:
   - `TableOfContentsGenerator`
   - `TableOfContentsGeneratorInterface`
   - `TableOfContentsPlaceholder`
   - `TableOfContentsPlaceholderParser`
   - `TableOfContentsPlaceholderRenderer`

### Changed

- "Moved" the `TableOfContents` class into a new `Node` sub-namespace (with backward-compatibility)
 - Reference labels are now generated and stored in lower-case instead of upper-case
 - Reference labels are no longer normalized inside the `Reference`, only the `ReferenceMap`

### Fixed

- Fixed reference label case folding polyfill not being consistent between different PHP versions

### Deprecated

- Deprecated the `CommonMarkConverter::VERSION` constant (#496)
 - Deprecated `League\CommonMark\Extension\Autolink\InlineMentionParser` (use `League\CommonMark\Extension\Mention\MentionParser` instead)
 - Deprecated everything under `League\CommonMark\Extension\HeadingPermalink\Slug` (use the classes under `League\CommonMark\Normalizer` instead)
 - Deprecated `League\CommonMark\Extension\TableOfContents\TableOfContents` (use the one in the new `Node` sub-namespace instead)
 - Deprecated the `STYLE_` and `NORMALIZE_` constants in `TableOfContentsBuilder` (use the ones in `TableOfContentsGenerator` instead)
 - Deprecated the `\League\CommonMark\Extension\HeadingPermalink\HeadingPermalinkRenderer::DEFAULT_INNER_CONTENTS` constant (#505)
 - Deprecated the `heading_permalink/inner_contents` configuration option in the `HeadingPermalink` extension (use the new `heading_permalink/symbol` configuration option instead) (#505)

## [1.4.3] - 2020-05-04

### Fixed

- Fixed certain Unicode letters, numbers, and marks not being preserved when generating URL slugs (#467)

## [1.4.2] - 2020-04-24

### Fixed

- Fixed inline code blocks not be included within heading permalinks (#457)

## [1.4.1] - 2020-04-20

### Fixed

- Fixed BC break caused by ConverterInterface alias not being used by some DI containers (#454)

## [1.4.0] - 2020-04-18

### Added

- Added new [Heading Permalink extension](https://commonmark.thephpleague.com/extensions/heading-permalinks/) (#420)
 - Added new [Table of Contents extension](https://commonmark.thephpleague.com/extensions/table-of-contents/) (#441)
 - Added new `MarkdownConverterInterface` as a long-term replacement for `ConverterInterface` (#439)
 - Added new `DocumentPreParsedEvent` event (#427, #359, #399)
 - Added new `ListBlock::TYPE_BULLET` constant as a replacement for `ListBlock::TYPE_UNORDERED`
 - Added new `MarkdownInput` class and `MarkdownInputInterface` to handle pre-parsing and allow listeners to replace Markdown contents

### Changed

- Block & inline renderers will now render child classes automatically (#222, #209)
 - The `ListBlock` constants now use fully-lowercased values instead of titlecased values
 - Significantly improved typing

### Fixed

- Fixed loose comparison when checking for table alignment
 - Fixed `StaggeredDelimiterProcessor` returning from a `void` function

### Deprecated

- The `Converter` class has been deprecated; use `CommonMarkConverter` instead (#438, #439)
 - The `ConverterInterface` has been deprecated; use `MarkdownConverterInterface` instead (#438, #439)
 - The `bin/commonmark` script has been deprecated
 - The following methods of `ArrayCollection` have been deprecated:
   - `add()`
   - `set()`
   - `get()`
   - `remove()`
   - `isEmpty()`
   - `contains()`
   - `indexOf()`
   - `containsKey()`
   - `replaceWith()`
   - `removeGaps()`
 - The `ListBlock::TYPE_UNORDERED` constant has been deprecated, use `ListBlock::TYPE_BULLET` instead

## [1.3.4] - 2020-04-13

### Fixed

- Fixed configuration/environment not being injected into event listeners when adding them via `[$instance, 'method']` callable syntax (#440)

## [1.3.3] - 2020-04-05

### Fixed

- Fixed event listeners not having the environment or configuration injected if they implemented the `EnvironmentAwareInterface` or `ConfigurationAwareInterface` (#423)

## [1.3.2] - 2020-03-25

### Fixed

- Optimized URL normalization in cases where URLs don't contain special characters (#417, #418)

## [1.3.1] - 2020-02-28

### Fixed

- Fixed return types of `Environment::createCommonMarkEnvironment()` and `Environment::createGFMEnvironment()`

## [1.3.0] - 2020-02-08

### Added

- Added (optional) **full GFM support!** 🎉🎉🎉 (#409)
 - Added check to ensure Markdown input is valid UTF-8 (#401, #405)
 - Added new `unordered_list_markers` configuration option (#408, #411)

### Changed

- Introduced several micro-optimizations for a 5-10% performance boost

## [1.2.2] - 2020-01-15

This release contains the same changes as 1.1.3:

### Fixed

- Fixed link parsing edge case (#403)

## [1.1.3] - 2020-01-15

### Fixed

- Fixed link parsing edge case (#403)

## [1.2.1] - 2020-01-14

### Changed

- Introduced several micro-optimizations, reducing the parse time by 8%

## [1.2.0] - 2020-01-09

### Changed

- Removed URL decoding step before encoding (more performant and better matches the JS library)
 - Removed redundant token from HTML tag regex

## [1.1.2] - 2019-12-09

### Fixed

- Fixed URL normalization not handling non-UTF-8 sequences properly (#395, #396)

## [1.1.1] - 2019-11-11

### Fixed

- Fixed handling of link destinations with unbalanced unescaped parens
 - Fixed adding delimiters to stack which can neither open nor close a run

## [1.1.0] - 2019-10-31

### Added

- Added a new `Html5EntityDecoder` class (#387)

### Changed

- Improved performance by 10% (#389)
 - Made entity decoding less memory-intensive (#386, #387)

### Fixed

- Fixed PHP 7.4 compatibility issues

### Deprecated

- Deprecated the `Html5Entities` class - use `Html5EntityDecoder` instead (#387)

## [1.0.0] - 2019-06-29

No changes were made since 1.0.0-rc1.

## [1.0.0-rc1] - 2019-06-19

### Added

- Extracted a `ReferenceMapInterface` from the `ReferenceMap` class
 - Added optional `ReferenceMapInterface` parameter to the `Document` constructor

### Changed

- Replaced all references to `ReferenceMap` with `ReferenceMapInterface`
 - `ReferenceMap::addReference()` no longer returns `$this`

### Fixed

- Fixed bug where elements with content of `"0"` wouldn't be rendered (#376)

## [1.0.0-beta4] - 2019-06-05

### Added

- Added event dispatcher functionality (#359, #372)

### Removed

- Removed `DocumentProcessorInterface` functionality in favor of event dispatching (#373)

## [1.0.0-beta3] - 2019-05-27

### Changed

- Made the `Delimiter` class final and extracted a new `DelimiterInterface`
   - Modified most external usages to use this new interface
 - Renamed three `Delimiter` methods:
   - `getOrigDelims()` renamed to `getOriginalLength()`
   - `getNumDelims()` renamed to `getLength()`
   - `setNumDelims()` renamed to `setLength()`
 - Made additional classes final:
   - `DelimiterStack`
   - `ReferenceMap`
   - `ReferenceParser`
 - Moved `ReferenceParser` into the `Reference` sub-namespace

### Removed

- Removed unused `Delimiter` methods:
   - `setCanOpen()`
   - `setCanClose()`
   - `setChar()`
   - `setIndex()`
   - `setInlineNode()`
 - Removed fluent interface from `Delimiter` (setter methods now have no return values)

## [1.0.0-beta2] - 2019-05-27

### Changed

- `DelimiterProcessorInterface::process()` will accept any type of `AbstractStringContainer` now, not just `Text` nodes
 - The `Delimiter` constructor, `getInlineNode()`, and `setInlineNode()` no longer accept generic `Node` elements - only `AbstractStringContainer`s

### Removed

- Removed all deprecated functionality:
   - The `safe` option (use `html_input` and `allow_unsafe_links` options instead)
   - All deprecated `RegexHelper` constants
   - `DocParser::getEnvironment()` (you should obtain it some other way)
   - `AbstractInlineContainer` (use `AbstractInline` instead and make `isContainer()` return `true`)

## [1.0.0-beta1] - 2019-05-26

### Added

- Added proper support for delimiters, including custom delimiters
   - `addDelimiterProcessor()` added to `ConfigurableEnvironmentInterface` and `Environment`
 - Basic delimiters no longer need custom parsers - they'll be parsed automatically
 - Added new methods:
   - `AdjacentTextMerger::mergeTextNodesBetweenExclusive()`
   - `CommonMarkConveter::getEnvironment()`
   - `Configuration::set()`
 - Extracted some new interfaces from base classes:
   - `DocParserInterface` created from `DocParser`
   - `ConfigurationInterface` created from `Configuration`
   - `ReferenceInterface` created from `Reference`

### Changed

- Renamed several methods of the `Configuration` class:
   - `getConfig()` renamed to `get()`
   - `mergeConfig()` renamed to `merge()`
   - `setConfig()` renamed to `replace()`
 - Changed `ConfigurationAwareInterface::setConfiguration()` to accept the new `ConfigurationInterface` instead of the concrete class
 - Renamed the `AdjoiningTextCollapser` class to `AdjacentTextMerger`
   - Replaced its `collapseTextNodes()` method with the new `mergeChildNodes()` method
 - Made several classes `final`:
   - `Configuration`
   - `DocParser`
   - `HtmlRenderer`
   - `InlineParserEngine`
   - `NodeWalker`
   - `Reference`
   - All of the block/inline parsers and renderers
 - Reduced visibility of several internal methods to `private`:
    - `DelimiterStack::findEarliest()`
    - All `protected` methods in `InlineParserEngine`
 - Marked some classes and methods as `@internal`
 - `ElementRendererInterface` now requires a public `renderInline()` method; added this to `HtmlRenderer`
 - Changed `InlineParserEngine::parse()` to require an `AbstractStringContainerBlock` instead of the generic `Node` class
 - Un-deprecated the `CommonmarkConverter::VERSION` constant
 - The `Converter` constructor now requires an instance of `DocParserInterface` instead of the concrete `DocParser`
 - Changed `Emphasis`, `Strong`, and `AbstractWebResource` to directly extend `AbstractInline` instead of the (now-deprecated) intermediary `AbstractInlineContainer` class

### Fixed

- Fixed null errors when inserting sibling `Node`s without parents
 - Fixed `NodeWalkerEvent` not requiring a `Node` via its constructor
 - Fixed `Reference::normalizeReference()` improperly converting to uppercase instead of performing proper Unicode case-folding
 - Fixed strong emphasis delimiters not being preserved when `enable_strong` is set to `false` (it now works identically to `enable_em`)

### Deprecated

- Deprecated `DocParser::getEnvironment()` (you should obtain it some other way)
 - Deprecated `AbstractInlineContainer` (use `AbstractInline` instead and make `isContainer()` return `true`)

### Removed

- Removed inline processor functionality now that we have proper delimiter support:
   - Removed `addInlineProcessor()` from `ConfigurableEnvironmentInterface` and `Environment`
   - Removed `getInlineProcessors()` from `EnvironmentInterface` and `Environment`
   - Removed `EmphasisProcessor`
   - Removed `InlineProcessorInterface`
 - Removed `EmphasisParser` now that we have proper delimiter support
 - Removed support for non-UTF-8-compatible encodings
    - Removed `getEncoding()` from `ContextInterface`
    - Removed `getEncoding()`, `setEncoding()`, and `$encoding` from `Context`
    - Removed `getEncoding()` and the second `$encoding` constructor param from `Cursor`
 - Removed now-unused methods
   - Removed `DelimiterStack::getTop()` (no replacement)
   - Removed `DelimiterStack::iterateByCharacters()` (use the new `processDelimiters()` method instead)
   - Removed the protected `DelimiterStack::findMatchingOpener()` method

[unreleased]: https://github.com/thephpleague/commonmark/compare/1.6.6...1.6
[1.6.6]: https://github.com/thephpleague/commonmark/compare/1.6.5...1.6.6
[1.6.5]: https://github.com/thephpleague/commonmark/compare/1.6.4...1.6.5
[1.6.4]: https://github.com/thephpleague/commonmark/compare/1.6.3...1.6.4
[1.6.3]: https://github.com/thephpleague/commonmark/compare/1.6.2...1.6.3
[1.6.2]: https://github.com/thephpleague/commonmark/compare/1.6.1...1.6.2
[1.6.1]: https://github.com/thephpleague/commonmark/compare/1.6.0...1.6.1
[1.6.0]: https://github.com/thephpleague/commonmark/compare/1.5.8...1.6.0
[1.5.8]: https://github.com/thephpleague/commonmark/compare/1.5.7...1.5.8
[1.5.7]: https://github.com/thephpleague/commonmark/compare/1.5.6...1.5.7
[1.5.6]: https://github.com/thephpleague/commonmark/compare/1.5.5...1.5.6
[1.5.5]: https://github.com/thephpleague/commonmark/compare/1.5.4...1.5.5
[1.5.4]: https://github.com/thephpleague/commonmark/compare/1.5.3...1.5.4
[1.5.3]: https://github.com/thephpleague/commonmark/compare/1.5.2...1.5.3
[1.5.2]: https://github.com/thephpleague/commonmark/compare/1.5.1...1.5.2
[1.5.1]: https://github.com/thephpleague/commonmark/compare/1.5.0...1.5.1
[1.5.0]: https://github.com/thephpleague/commonmark/compare/1.4.3...1.5.0
[1.4.3]: https://github.com/thephpleague/commonmark/compare/1.4.2...1.4.3
[1.4.2]: https://github.com/thephpleague/commonmark/compare/1.4.1...1.4.2
[1.4.1]: https://github.com/thephpleague/commonmark/compare/1.4.0...1.4.1
[1.4.0]: https://github.com/thephpleague/commonmark/compare/1.3.4...1.4.0
[1.3.4]: https://github.com/thephpleague/commonmark/compare/1.3.3...1.3.4
[1.3.3]: https://github.com/thephpleague/commonmark/compare/1.3.2...1.3.3
[1.3.2]: https://github.com/thephpleague/commonmark/compare/1.3.1...1.3.2
[1.3.1]: https://github.com/thephpleague/commonmark/compare/1.3.0...1.3.1
[1.3.0]: https://github.com/thephpleague/commonmark/compare/1.2.2...1.3.0
[1.2.2]: https://github.com/thephpleague/commonmark/compare/1.2.1...1.2.2
[1.2.1]: https://github.com/thephpleague/commonmark/compare/1.2.0...1.2.1
[1.2.0]: https://github.com/thephpleague/commonmark/compare/1.1.2...1.2.0
[1.1.3]: https://github.com/thephpleague/commonmark/compare/1.1.2...1.1.3
[1.1.2]: https://github.com/thephpleague/commonmark/compare/1.1.1...1.1.2
[1.1.1]: https://github.com/thephpleague/commonmark/compare/1.1.0...1.1.1
[1.1.0]: https://github.com/thephpleague/commonmark/compare/1.0.0...1.1.0
[1.0.0]: https://github.com/thephpleague/commonmark/compare/1.0.0-rc1...1.0.0
[1.0.0-rc1]: https://github.com/thephpleague/commonmark/compare/1.0.0-beta4...1.0.0-rc1
[1.0.0-beta4]: https://github.com/thephpleague/commonmark/compare/1.0.0-beta3...1.0.0-beta4
[1.0.0-beta3]: https://github.com/thephpleague/commonmark/compare/1.0.0-beta2...1.0.0-beta3
[1.0.0-beta2]: https://github.com/thephpleague/commonmark/compare/1.0.0-beta1...1.0.0-beta2
[1.0.0-beta1]: https://github.com/thephpleague/commonmark/compare/0.19.2...1.0.0-beta1

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