PrawnEx.Text (prawn_ex v0.6.0)

Copy Markdown View Source

Text utilities: width estimation and line wrapping for PDF layout.

Uses a Helvetica-like character-width approximation (~0.5 pt per character per unit font size).

Summary

Functions

estimated_width(text, font_size)

Estimated width of a string in points (Helvetica-like).

wrap_to_lines(text, max_width, font_size)

Breaks a string into lines that fit within max_width (in points). Splits on spaces (words); if a word exceeds max_width, breaks by character. Preserves existing newlines as paragraph breaks.

Functions

estimated_width(text, font_size)

@spec estimated_width(String.t(), number()) :: number()

Estimated width of a string in points (Helvetica-like).

wrap_to_lines(text, max_width, font_size)

@spec wrap_to_lines(String.t(), number(), number()) :: [String.t()]

Breaks a string into lines that fit within max_width (in points). Splits on spaces (words); if a word exceeds max_width, breaks by character. Preserves existing newlines as paragraph breaks.