pikchr 1.1.2

Bug fixes

Updated the bundled ‘pikchr’ C source to upstream check-in a7f1c35bc0 (2026-04-03). It fixes nested macro calls whose pass-through arguments ($1, $2, …) are split across lines with a trailing backslash, which previously failed with a syntax error (upstream forum post c1d9a4c125a6a5bf). This is the only code change upstream since the previous import (2f03080029, 2025-03-21); the data-pikchr-date attribute of generated SVGs is now 20260403102956.

Fixed a memory leak in the C interface (pikchr_c): the SVG buffer returned by pikchr() was never freed, leaking on every diagram render.
Guarded the C interface against a possible NULL return from pikchr() that could crash the R session.
Fixed the height argument default in pikchr(), which never fell back to the SVG viewBox height and produced an empty height: CSS rule.
Aligned the documented argument defaults of pikchr() (width, height, fontSize, fontFamily, align) with the actual function defaults.

Regenerated the package logo with a geometrically regular hexagon (the previous SVG was horizontally squished) and fixed an invalid <def> element (now <defs>) in the logo source.

Quarto and RMarkdown improvements: The knitr engine now supports fig.cap (figure captions with <figure>/<figcaption> in HTML), fig.alt (accessibility alt text via aria-label), and fig.align as standard knitr options.
Non-HTML output support: Automatic PNG conversion for all non-HTML formats including DOCX, EPUB, and Typst (previously only LaTeX/PDF was supported).
DPI-aware PNG conversion: The dpi chunk option (default 150) controls PNG resolution for non-HTML outputs.
Error detection: Pikchr compilation errors now produce informative warnings with the error message, instead of silently embedding invalid markup.
Quarto cross-referencing: Chunks with labels starting with fig- receive an HTML id attribute for Quarto cross-reference compatibility.

Replaced message(), warning(), and stop() with cli::cli_inform(), cli::cli_warn(), and cli::cli_abort() for consistent and user-friendly messaging.
Removed dplyr, purrr, and rlang from Imports, replaced with base R operations for a lighter dependency footprint.
Replaced tidyverse in Suggests with specific packages (rmarkdown).
Updated authors list.
Removed compiled objects (.o, .so) from src/.
Cleaned up commented-out code and removed duplicate engine registration.

Corrected automatic detection of LaTeX output: when knitting to PDF, the SVG diagram is now converted to a PNG image using the rsvg package, ensuring compatibility with LaTeX-based outputs.

Adjusted SVG attribute handling to prevent false “NAs introduced by coercion” warnings caused by unexpected coercion of non-numeric attributes.

Added a NEWS.md file to track changes to the package.
Embedded Google Fonts in SVG Files: Added functionality to embed Google Fonts directly into the generated SVG files, improving the portability and visual consistency of diagrams.
Improved Processing in RMarkdown: Enhanced integration with RMarkdown for smoother and more efficient rendering of diagrams within documents.

mirror server hosted at Truenetwork, Russian Federation.