News in 5.22.0, 2026-09-18
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This is a stable release for GNOME 51.0

Changes since 5.20.0, including the 5.21.x development series:

 * Reject non-regular files before opening them in GtkSourceFileLoader
 * Add a configurable GtkSourceFileLoader max-size limit, defaulting to
   1 GiB, for file, stream, and decompressed input
 * Report oversized loads with GTK_SOURCE_FILE_LOADER_ERROR_TOO_BIG
 * Centralize checked arithmetic for input sizes and buffer growth
 * Unwind buffer output streams when file loading fails
 * Handle stream-based loads without a file location in profiler marks
 * Expand file loader tests for size limits, compressed input, load
   failures, and arithmetic boundaries
 * Fix gutter renderer list and gutter lines leaks
 * Break a circular reference when line numbers are enabled
 * Avoid temporary region and text mark allocations in search context
   intersection checks
 * Avoid per-line timer allocations in the syntax highlighting engine
 * Avoid rescanning UTF-8 text to determine line character counts
 * Reduce scrolling overhead in GtkSourceMap
 * Fix GtkSourceMap slider sizing and positioning when the map is taller
   than its contents
 * Reduce allocations and per-line work when drawing source mark backgrounds
 * Reduce array access overhead in gutter lines
 * Fix vertical alignment when jumping to text positions
 * Improve Vim emulation for command repetition, r, and cw/cW
 * Add Vim support for +, X, gu, gU, g~, and visual-mode ~
 * Add Vim Ctrl-A and Ctrl-X support for signed decimal numbers
 * Add Vim :set aliases and :noh/:nohlsearch commands
 * Expand Vim input tests for commands, motions, and repetition
 * Use canonical property names and static strings for properties
 * Add missing API version annotations and correct function attributes
 * Translation updates, including new Lao and Uzbek (Latin) translations

Maintainer's note: My family needed to move abroad for our safety. I am
currently unemployed and living abroad, and my continued maintainership
of GtkSourceView is on an ad hoc basis. Sustained maintenance depends
heavily on a company stepping forward to support me abroad, after Red Hat
declined my request to relocate while remaining in my role despite the
safety concerns facing my family. Organizations that rely on this library
can help by supporting its maintenance. For background, see my
"Mid-life transitions" post:
https://blogs.gnome.org/chergert/2026/02/06/mid-life-transitions/