// Fixture-derived root viewport overrides for Mermaid@11.12.2 Sankey diagrams.
//
// These values are taken from upstream SVG baselines under
// `fixtures/upstream-svgs/sankey/*.svg` and are keyed by `diagram_id` (fixture stem).
//
// They are used to keep `parity-root` stable at higher decimal precision when browser float
// behavior (DOM `getBBox()` + serialization) differs from our deterministic headless pipeline.
pub fn lookup_sankey_root_viewport_override(
diagram_id: &str,
) -> Option<(&'static str, &'static str)> {
match diagram_id {
"upstream_docs_sankey_example_002" => Some(("0 0 600 406.89434814453125", "600")),
"upstream_examples_sankey_energy_flow_001" => Some(("0 0 600 406.89434814453125", "600")),
"upstream_html_demos_sankey_energy_flow_002" => {
Some(("0 0 1200 600.8479614257812", "1200"))
}
_ => None,
}
}