Preserve Code Formatting

Changelog

5.0 (2025-08-10)

Highlights:

This major release significantly improves security, performance, and compatibility. The plugin framework updates to version 070 for enhanced security and features. Block editor content is now properly excluded (the plugin was designed for text view), and compatibility extends through WordPress 6.8+ while dropping support for versions older than 5.5. Additional improvements include better error handling, enhanced documentation, and the addition of CSS classes for styling processed code blocks.

Details:

• Security and hardening:
  • Hardening: Prevent regex pattern injection vulnerability
  • Hardening: Prevent object injection vulnerability. Props Patchstack.
  • Hardening: Prevent bypassing preprocessor by removing any explicit pseudo-tags from content
  • Hardening: Prevent processing of excessively large content
  • Hardening: Prevent unintended markup in translated strings before display
  • Hardening: Prevent content-native usage of token string used internally to chunk data
• Performance:
  • Change: Improve performance of processing tags to be preserved
  • Change: Bail early if there are no tags configured to be preserved
  • Change: Skip tags that have no content
  • Change: Centralize regex patterns in new get_preprocess_regex_pattern() and get_postprocess_regex_pattern()
  • Change: Use more efficient preg_replace_callback() for tag extractions
• Block editor and content handling:
  • New: Prevent processing of all block editor content (plugin was designed for text view, not block editor)
  • Fix: Prevent unintended greediness when multiple instances of a tag are present
• UI and styling:
  • New: Output class of “preserve-code-formatting” for all tags that were processed
  • Change: Output example ‘code’ and ‘pre’ tags within ‘code’ tags within setting page description
• Framework and compatibility:
  • Change: Update plugin framework to 070
  • Change: Note compatibility through WP 6.8+
  • Change: Drop compatibility with versions of WP older than 5.5
  • Change: Note compatibility through PHP 8.3+
  • Change: Update copyright date (2025)
• Code quality and documentation:
  • New: Add FAQ entry explaining nested tag deficiency
  • Change: Update get_c2c_string() to add new strings
  • Change: Improve some docblock documentation
  • Change: Tweak some README.md formatting
  • Change: Tweak installation instructions
  • Change: Reduce number of tags defined in readme.txt
  • Change: Note removal of development and testing related files from release packaging
  • Change: Add missing release dates for earlier releases, as well as add an omitted release

4.0.1 (2021-04-14)

• Fix: Update plugin framework to 061 to fix a bug preventing settings from getting saved

4.0 (2021-04-03)

Highlights:

• This recommended release prevents potential conflicts with other plugins (such as SyntaxHighlighter), updates the plugin framework, and notes compatibility through WP 5.7+.

Details:

• Change: Use {!{ and }!} instead of [[ and ]] to prevent interpretation as shortcodes, fixing conflict with SyntaxHighlighter. Props azito122.
• Change: Update plugin framework to 060
  • 060:
  • Rename class from c2c_{PluginName}_Plugin_051 to c2c_Plugin_060
  • Move string translation handling into inheriting class making the plugin framework code plugin-agnostic
    • Add abstract function get_c2c_string() as a getter for translated strings
    • Replace all existing string usage with calls to get_c2c_string()
  • Handle WordPress’s deprecation of the use of the term “whitelist”
    • Change: Rename whitelist_options() to allowed_options()
    • Change: Use add_allowed_options() instead of deprecated add_option_whitelist() for WP 5.5+
    • Change: Hook allowed_options filter instead of deprecated whitelist_options for WP 5.5+
  • New: Add initial unit tests (currently just covering is_wp_version_cmp() and get_c2c_string())
  • Add is_wp_version_cmp() as a utility to compare current WP version against a given WP version
  • Refactor contextual_help() to be easier to read, and correct function docblocks
  • Don’t translate urlencoded donation email body text
  • Add inline comments for translators to clarify purpose of placeholders
  • Change PHP package name (make it singular)
  • Tweak inline function description
  • Note compatibility through WP 5.7+
  • Update copyright date (2021)
  • 051:
  • Allow setting integer input value to include commas
  • Use number_format_i18n() to format integer value within input field
  • Update link to coffee2code.com to be HTTPS
  • Update readme_url() to refer to plugin’s readme.txt on plugins.svn.wordpress.org
  • Remove defunct line of code
• Change: Move translation of all parent class strings into main plugin file
• Change: Note compatibility through WP 5.7+
• Change: Update copyright date (2021)

Full changelog is available in CHANGELOG.md.