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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 | 3x 7x 1x 6x 3x 3x 3x 8x 3x 5x 5x 5x 5x 8x 8x 8x 8x 8x 8x 8x 3x 7x 4x 3x 3x 3x 3x | import type { DonutChartItem } from "./index";
export interface ChartArcSegment {
key: string;
color: string;
length: number;
offset: number;
startArcLength: number;
endArcLength: number;
}
export interface ChartTailOverlaySegment {
key: string;
color: string;
length: number;
offset: number;
}
export const formatDisplayTotal = (
totalCount: number,
formatter?: (total: number) => string,
): string => {
if (formatter) {
return formatter(totalCount);
}
if (totalCount === 0) {
return "0";
}
return String(totalCount).padStart(2, "0");
};
export const createSegments = ({
activeItems,
totalCount,
circumference,
segmentGap,
}: {
activeItems: DonutChartItem[];
totalCount: number;
circumference: number;
segmentGap: number;
}): ChartArcSegment[] => {
if (activeItems.length === 0) {
return [];
}
const base = Math.max(totalCount, 1);
const adjustedGap = activeItems.length > 1 ? Math.max(segmentGap, 0) : 0;
let cumulativeLength = 0;
return activeItems.map((item, index) => {
const rawLength = (item.count / base) * circumference;
const length = Math.max(rawLength - adjustedGap, 1);
const startArcLength = cumulativeLength;
const endArcLength = startArcLength + length;
const offset = -startArcLength;
cumulativeLength += rawLength;
return {
key: `${item.category}-${index}`,
color: item.color,
length,
offset,
startArcLength,
endArcLength,
};
});
};
export const createTailOverlays = ({
segments,
strokeWidth,
}: {
segments: ChartArcSegment[];
strokeWidth: number;
}): ChartTailOverlaySegment[] => {
if (segments.length <= 1) {
return [];
}
return segments.slice(0, -1).map((segment) => {
const overlayLength = Math.min(strokeWidth * 0.9, Math.max(segment.length, 1));
const overlayStart = segment.endArcLength - overlayLength / 2;
return {
key: `${segment.key}-tail-overlay`,
color: segment.color,
length: overlayLength,
offset: -overlayStart,
};
});
};
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