import getOppositePlacement from "../utils/getOppositePlacement.js"; import getBasePlacement from "../utils/getBasePlacement.js"; import getOppositeVariationPlacement from "../utils/getOppositeVariationPlacement.js"; import detectOverflow from "../utils/detectOverflow.js"; import computeAutoPlacement from "../utils/computeAutoPlacement.js"; import { bottom, top, start, right, left, auto } from "../enums.js"; import getVariation from "../utils/getVariation.js"; // eslint-disable-next-line import/no-unused-modules function getExpandedFallbackPlacements(placement) { if (getBasePlacement(placement) === auto) { return []; } var oppositePlacement = getOppositePlacement(placement); return [getOppositeVariationPlacement(placement), oppositePlacement, getOppositeVariationPlacement(oppositePlacement)]; } function flip(_ref) { var state = _ref.state, options = _ref.options, name = _ref.name; if (state.modifiersData[name]._skip) { return; } var _options$mainAxis = options.mainAxis, checkMainAxis = _options$mainAxis === void 0 ? true : _options$mainAxis, _options$altAxis = options.altAxis, checkAltAxis = _options$altAxis === void 0 ? true : _options$altAxis, specifiedFallbackPlacements = options.fallbackPlacements, padding = options.padding, boundary = options.boundary, rootBoundary = options.rootBoundary, altBoundary = options.altBoundary, _options$flipVariatio = options.flipVariations, flipVariations = _options$flipVariatio === void 0 ? true : _options$flipVariatio, allowedAutoPlacements = options.allowedAutoPlacements; var preferredPlacement = state.options.placement; var basePlacement = getBasePlacement(preferredPlacement); var isBasePlacement = basePlacement === preferredPlacement; var fallbackPlacements = specifiedFallbackPlacements || (isBasePlacement || !flipVariations ? [getOppositePlacement(preferredPlacement)] : getExpandedFallbackPlacements(preferredPlacement)); var placements = [preferredPlacement].concat(fallbackPlacements).reduce(function (acc, placement) { return acc.concat(getBasePlacement(placement) === auto ? computeAutoPlacement(state, { placement: placement, boundary: boundary, rootBoundary: rootBoundary, padding: padding, flipVariations: flipVariations, allowedAutoPlacements: allowedAutoPlacements }) : placement); }, []); var referenceRect = state.rects.reference; var popperRect = state.rects.popper; var checksMap = new Map(); var makeFallbackChecks = true; var firstFittingPlacement = placements[0]; for (var i = 0; i < placements.length; i++) { var placement = placements[i]; var _basePlacement = getBasePlacement(placement); var isStartVariation = getVariation(placement) === start; var isVertical = [top, bottom].indexOf(_basePlacement) >= 0; var len = isVertical ? 'width' : 'height'; var overflow = detectOverflow(state, { placement: placement, boundary: boundary, rootBoundary: rootBoundary, altBoundary: altBoundary, padding: padding }); var mainVariationSide = isVertical ? isStartVariation ? right : left : isStartVariation ? bottom : top; if (referenceRect[len] > popperRect[len]) { mainVariationSide = getOppositePlacement(mainVariationSide); } var altVariationSide = getOppositePlacement(mainVariationSide); var checks = []; if (checkMainAxis) { checks.push(overflow[_basePlacement] <= 0); } if (checkAltAxis) { checks.push(overflow[mainVariationSide] <= 0, overflow[altVariationSide] <= 0); } if (checks.every(function (check) { return check; })) { firstFittingPlacement = placement; makeFallbackChecks = false; break; } checksMap.set(placement, checks); } if (makeFallbackChecks) { // `2` may be desired in some cases – research later var numberOfChecks = flipVariations ? 3 : 1; var _loop = function _loop(_i) { var fittingPlacement = placements.find(function (placement) { var checks = checksMap.get(placement); if (checks) { return checks.slice(0, _i).every(function (check) { return check; }); } }); if (fittingPlacement) { firstFittingPlacement = fittingPlacement; return "break"; } }; for (var _i = numberOfChecks; _i > 0; _i--) { var _ret = _loop(_i); if (_ret === "break") break; } } if (state.placement !== firstFittingPlacement) { state.modifiersData[name]._skip = true; state.placement = firstFittingPlacement; state.reset = true; } } // eslint-disable-next-line import/no-unused-modules export default { name: 'flip', enabled: true, phase: 'main', fn: flip, requiresIfExists: ['offset'], data: { _skip: false } };