react-native-chart-kit/dist/v2/react-native/charts/bar/viewport.js

Beautiful React Native charts for dashboards, reports, and data-rich mobile apps.

const minVisiblePoints = 1;
const clamp = (value, min, max) => {
    if (max < min) {
        return min;
    }
    return Math.min(Math.max(value, min), max);
};
const normalizePositiveInteger = (value, fallback, min = 1) => {
    if (typeof value !== "number" || !Number.isFinite(value)) {
        return fallback;
    }
    return Math.max(min, Math.floor(value));
};
export const resolveBarChartViewport = ({ itemCount, scrollable = false, viewportWidth, visiblePoints }) => {
    const safeViewportWidth = Number.isFinite(viewportWidth) && viewportWidth > 0 ? viewportWidth : 0;
    const safeItemCount = normalizePositiveInteger(itemCount, 0, 0);
    const fallbackVisiblePoints = Math.max(safeItemCount, minVisiblePoints);
    const normalizedVisiblePoints = clamp(normalizePositiveInteger(visiblePoints, fallbackVisiblePoints), minVisiblePoints, Math.max(safeItemCount, minVisiblePoints));
    const shouldScroll = scrollable &&
        safeViewportWidth > 0 &&
        safeItemCount > normalizedVisiblePoints;
    const contentWidth = shouldScroll
        ? Math.max(safeViewportWidth, (safeViewportWidth / normalizedVisiblePoints) * safeItemCount)
        : safeViewportWidth;
    return {
        contentWidth,
        itemCount: safeItemCount,
        maxOffset: Math.max(0, contentWidth - safeViewportWidth),
        scrollable: shouldScroll,
        viewportWidth: safeViewportWidth,
        visiblePoints: normalizedVisiblePoints
    };
};
export const resolveBarChartViewportInitialOffset = ({ initialIndex = "start", viewport }) => {
    if (!viewport.scrollable || initialIndex === "start") {
        return 0;
    }
    if (initialIndex === "end") {
        return viewport.maxOffset;
    }
    if (!Number.isFinite(initialIndex) || viewport.itemCount <= 0) {
        return 0;
    }
    const index = clamp(Math.floor(initialIndex), 0, viewport.itemCount - 1);
    const bandWidth = viewport.contentWidth / viewport.itemCount;
    return clamp(index * bandWidth, 0, viewport.maxOffset);
};