@tamagui/react-native-web-lite
Version:
React Native for Web
57 lines (56 loc) • 2.72 kB
JavaScript
import { invariant } from "@tamagui/react-native-web-internals";
class CellRenderMask {
constructor(numCells) {
invariant(numCells >= 0, "CellRenderMask must contain a non-negative number os cells"), this._numCells = numCells, numCells === 0 ? this._regions = [] : this._regions = [{
first: 0,
last: numCells - 1,
isSpacer: !0
}];
}
enumerateRegions() {
return this._regions;
}
addCells(cells) {
if (invariant(cells.first >= 0 && cells.first < this._numCells && cells.last >= -1 && cells.last < this._numCells && cells.last >= cells.first - 1, "CellRenderMask.addCells called with invalid cell range"), cells.last < cells.first) return;
const [firstIntersect, firstIntersectIdx] = this._findRegion(cells.first),
[lastIntersect, lastIntersectIdx] = this._findRegion(cells.last);
if (firstIntersectIdx === lastIntersectIdx && !firstIntersect.isSpacer) return;
const newLeadRegion = [],
newTailRegion = [],
newMainRegion = {
...cells,
isSpacer: !1
};
firstIntersect.first < newMainRegion.first && (firstIntersect.isSpacer ? newLeadRegion.push({
first: firstIntersect.first,
last: newMainRegion.first - 1,
isSpacer: !0
}) : newMainRegion.first = firstIntersect.first), lastIntersect.last > newMainRegion.last && (lastIntersect.isSpacer ? newTailRegion.push({
first: newMainRegion.last + 1,
last: lastIntersect.last,
isSpacer: !0
}) : newMainRegion.last = lastIntersect.last);
const replacementRegions = [...newLeadRegion, newMainRegion, ...newTailRegion],
numRegionsToDelete = lastIntersectIdx - firstIntersectIdx + 1;
this._regions.splice(firstIntersectIdx, numRegionsToDelete, ...replacementRegions);
}
numCells() {
return this._numCells;
}
equals(other) {
return this._numCells === other._numCells && this._regions.length === other._regions.length && this._regions.every((region, i) => region.first === other._regions[i].first && region.last === other._regions[i].last && region.isSpacer === other._regions[i].isSpacer);
}
_findRegion(cellIdx) {
let firstIdx = 0,
lastIdx = this._regions.length - 1;
for (; firstIdx <= lastIdx;) {
const middleIdx = Math.floor((firstIdx + lastIdx) / 2),
middleRegion = this._regions[middleIdx];
if (cellIdx >= middleRegion.first && cellIdx <= middleRegion.last) return [middleRegion, middleIdx];
cellIdx < middleRegion.first ? lastIdx = middleIdx - 1 : cellIdx > middleRegion.last && (firstIdx = middleIdx + 1);
}
invariant(!1, `A region was not found containing cellIdx ${cellIdx}`);
}
}
export { CellRenderMask };
//# sourceMappingURL=CellRenderMask.mjs.map