formualizer-workbook

formualizer-workbook layers workbook/session ergonomics on top of the Formualizer engine. It offers mutable sheet APIs, batch transactions, undo/redo support, and optional IO backends for XLSX/ODS/json import/export.

Features

• Mutable workbook model – add sheets, edit cells, and track staged formula changes without rebuilding the entire dependency graph.
• Engine integration – wraps formualizer-eval with workbook-friendly helpers for evaluating individual cells, ranges, or the whole model.
• Changelog + undo – opt into change logging and undo/redo stacks for UI or collaborative flows.
• IO adapters – pluggable backends (calamine, umya-spreadsheet, JSON) gated behind feature flags.

Usage

# use formualizer_common::LiteralValue;
# use formualizer_workbook::{IoError, Workbook};
# fn main() -> Result<(), IoError> {
let mut wb = Workbook::new();
wb.add_sheet("Sheet1");
wb.set_value("Sheet1", 1, 1, LiteralValue::Number(2.0))?;
wb.set_value("Sheet1", 1, 2, LiteralValue::Number(3.0))?;
wb.set_formula("Sheet1", 1, 3, "=A1+A2")?;

let result = wb.evaluate_cell("Sheet1", 1, 3)?;
assert_eq!(result, LiteralValue::Number(5.0));
# Ok(())
# }

License

Dual-licensed under MIT or Apache-2.0, at your option.