Carlos Florêncio
24 lines
828 B
TypeScript
24 lines
828 B
TypeScript
/** Shared constants and helpers for mermaid diagram rendering. */
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export const DEFAULT_SCALE = 0.75;
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export const SCALE_STEP = 0.1;
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export const MIN_SCALE = 0.1;
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export const MAX_SCALE = 1.5;
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/** Read intrinsic width/height from an SVG element's viewBox or attributes. */
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export function getSvgDimensions(container: HTMLElement): { w: number; h: number } | null {
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const svg = container.querySelector("svg");
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if (!svg) return null;
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const vb = svg.getAttribute("viewBox");
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if (vb) {
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const parts = vb.split(/[\s,]+/).map(Number);
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if (parts.length === 4 && parts[2] > 0 && parts[3] > 0) {
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return { w: parts[2], h: parts[3] };
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}
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}
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const w = parseFloat(svg.getAttribute("width") ?? "");
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const h = parseFloat(svg.getAttribute("height") ?? "");
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if (w > 0 && h > 0) return { w, h };
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return null;
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}
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