27 lines
1.1 KiB
JavaScript
27 lines
1.1 KiB
JavaScript
export const DESKTOP_READABILITY_VIEWPORT = Object.freeze({ width: 1440, height: 900 });
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export const DESKTOP_READER_MIN_WIDTH = 960;
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export const DESKTOP_READER_HORIZONTAL_CHROME = 30;
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export const DESKTOP_READER_DIAGRAM_WIDTH = DESKTOP_READER_MIN_WIDTH - DESKTOP_READER_HORIZONTAL_CHROME;
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export const MIN_PROJECTED_NODE_TEXT_PX = 6;
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export function projectedNodeTextPx(sourceFontPx, viewBoxWidth, diagramWidth = DESKTOP_READER_DIAGRAM_WIDTH) {
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if (![sourceFontPx, viewBoxWidth, diagramWidth].every(Number.isFinite) || viewBoxWidth <= 0 || diagramWidth <= 0) {
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return Number.NaN;
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}
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return sourceFontPx * Math.min(1, diagramWidth / viewBoxWidth);
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}
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export function minimumReadableSourceTextPx(
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viewBoxWidth,
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diagramWidth = DESKTOP_READER_DIAGRAM_WIDTH,
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minimumProjectedPx = MIN_PROJECTED_NODE_TEXT_PX,
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) {
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if (![viewBoxWidth, diagramWidth, minimumProjectedPx].every(Number.isFinite)
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|| viewBoxWidth <= 0
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|| diagramWidth <= 0
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|| minimumProjectedPx <= 0) {
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return Number.NaN;
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}
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return minimumProjectedPx / Math.min(1, diagramWidth / viewBoxWidth);
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}
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