97 lines
2.6 KiB
JavaScript
97 lines
2.6 KiB
JavaScript
import { tablet } from "../utils/device";
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import DomHelpers from "../utils/domHelpers";
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const paddingGap = 14;
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const flexGap = 4;
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const offset = 32;
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const wrapperPadding = DomHelpers.getViewport() <= tablet ? 16 : 20;
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export const countAutoOffset = (data, submenuItemsRef) => {
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const refCurrent = submenuItemsRef.current;
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const textWidths = data.map((d) => countTextWidth(d.name));
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const itemsAndGaps = countItemsAndGaps(textWidths);
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const submenuWidth = refCurrent.offsetWidth;
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const marker = refCurrent.scrollLeft + submenuWidth - wrapperPadding;
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const [itemOnMarker] = itemsAndGaps.filter(
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(obj) => obj.start < marker && marker < obj.end
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);
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if (itemOnMarker === undefined) return 0;
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if (
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itemOnMarker.type === "gap" &&
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itemOnMarker !== itemsAndGaps[itemsAndGaps.length - 1]
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)
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return itemOnMarker.end - marker + offset - wrapperPadding;
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if (itemOnMarker.type === "item" && marker - itemOnMarker.start < 32) {
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return -(marker - itemOnMarker.start - offset) - wrapperPadding;
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}
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if (
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itemOnMarker.type === "item" &&
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itemOnMarker.end - marker < 7.5 &&
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itemOnMarker !== itemsAndGaps[itemsAndGaps.length - 2]
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) {
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return itemOnMarker.end - marker + offset * 2 - wrapperPadding;
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}
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return 0;
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};
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const countTextWidth = (text) => {
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const inputText = text;
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const font = "600 13px open sans";
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const canvas = document.createElement("canvas");
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const context = canvas.getContext("2d");
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context.font = font;
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return context.measureText(inputText).width;
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};
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const countItemsAndGaps = (textWidths) => {
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const result = [];
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textWidths.forEach((textWidth) => {
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if (!result.length)
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result.push(
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{
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type: "gap",
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length: paddingGap,
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start: 0,
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end: paddingGap + wrapperPadding,
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},
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{
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type: "item",
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length: textWidth,
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start: paddingGap,
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end: paddingGap + textWidth,
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}
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);
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else {
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const lastItem = result[result.length - 1];
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result.push(
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{
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type: "gap",
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length: paddingGap * 2 + flexGap,
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start: lastItem.end,
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end: lastItem.end + paddingGap * 2 + flexGap,
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},
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{
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type: "item",
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length: textWidth,
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start: lastItem.end + paddingGap * 2 + flexGap,
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end: lastItem.end + paddingGap * 2 + flexGap + textWidth,
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}
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);
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}
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});
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result.push({
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type: "gap",
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length: paddingGap,
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start: result[result.length - 1].end,
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end: result[result.length - 1].end + paddingGap + wrapperPadding,
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});
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return result;
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};
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