v0.3.3

Bug fixes

• Unicode syntax highlighting tokens — Makeup token text can be chardata
  containing Unicode codepoints. Highlight formatting now uses Unicode-safe
  chardata conversion instead of byte-only iodata conversion, preventing crashes
  when rendering code nodes with characters like curly quotes.

v0.3.2

Bug fixes

• Pie chart FP noise — show_data: true displayed raw IEEE 754 artifacts like [5.8999999999999995]. Now uses ~g formatting (6 significant digits, trailing zeros stripped) matching the Python original.

v0.3.1

Bug fixes

• Stacked layout gap inflation — when max_width triggered vertical stacking, gap expansions computed for the wide layout were incorrectly reused, adding excessive vertical space between every node pair
• Mindmap multi-line labels — labels containing \n were inserted raw into connector strings, breaking line alignment. Now joined with · for inline display
• Gap expansion limited to source/target layers only — intermediate gaps that just carry straight vertical lines no longer get inflated

v0.3.0

Progressive compaction

When max_width is set and the graph is too wide, Boxart now tries progressively compact settings — smaller gap, then padding — before falling back to canvas clamping. Ported from termaid's auto-fit behavior.

Layout stacking

When compaction isn't enough, sibling nodes in the same layer are stacked vertically instead of side-by-side, keeping all nodes fully rendered with intact borders.

Syntax highlighting in themed output

Code nodes with :language now render with Makeup syntax colors (keywords, functions, strings, operators) alongside the theme's structural colors.

Bug fixes

• Labels no longer re-wrapped at hardcoded 20-char width — max_label_width is respected throughout
• max_width operates at canvas cell level — no broken box-drawing characters
• Mindmap handles tuple vertices without crashing

Hex.pm · HexDocs · Changelog

v0.2.0

New options

• max_width — clamp output to terminal width by truncating lines
• max_label_width — configurable word wrapping threshold (default: 20)

Boxart.render(graph, max_width: 80, max_label_width: 30)

Hex.pm · HexDocs · Changelog

v0.1.0

Initial release.

Features

• Directed graph rendering — accepts Graph.t() from libgraph, renders as Unicode/ASCII art
• Code nodes — source code with line numbers, optional Makeup syntax highlighting
• 17 node shapes — rectangle, diamond, rounded, hexagon, stadium, circle, cylinder, and more
• Edge styles — solid, dotted, thick, bidirectional, no-arrow (T-junction)
• Edge labels
• Subgraphs
• All 4 directions — TD, LR, BT, RL
• ANSI color themes — 7 built-in (default, mono, neon, dracula, nord, amber, phosphor) + custom
• Rounded/sharp edge corners
• Configurable padding and gap

Specialized renderers

• State diagrams — states as rounded boxes with start/end markers
• Sequence diagrams — lifelines, messages, activation boxes, notes, interaction blocks
• Git graphs — branch lines, commit markers, tags, fork/merge (LR, TB, BT)
• Gantt charts — task bars with time axis, sections, milestones
• Mindmaps — tree layout with left/right branching (accepts Graph.t())
• Pie charts — horizontal bar charts

All renderers implement the Boxart.Diagram behaviour.

Links

• Hex.pm
• HexDocs