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"use strict"; var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault"); Object.defineProperty(exports, "__esModule", { value: true }); exports["default"] = void 0; var _objectWithoutProperties2 = _interopRequireDefault(require("@babel/runtime/helpers/objectWithoutProperties")); var _classCallCheck2 = _interopRequireDefault(require("@babel/runtime/helpers/classCallCheck")); var _createClass2 = _interopRequireDefault(require("@babel/runtime/helpers/createClass")); var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty")); var _CellSizeAndPositionManager = _interopRequireDefault(require("./CellSizeAndPositionManager")); var _maxElementSize = require("./maxElementSize.js"); var _types = require("../types"); /** * Extends CellSizeAndPositionManager and adds scaling behavior for lists that are too large to fit within a browser's native limits. */ var ScalingCellSizeAndPositionManager = /*#__PURE__*/ function () { function ScalingCellSizeAndPositionManager(_ref) { var _ref$maxScrollSize = _ref.maxScrollSize, maxScrollSize = _ref$maxScrollSize === void 0 ? (0, _maxElementSize.getMaxElementSize)() : _ref$maxScrollSize, params = (0, _objectWithoutProperties2["default"])(_ref, ["maxScrollSize"]); (0, _classCallCheck2["default"])(this, ScalingCellSizeAndPositionManager); (0, _defineProperty2["default"])(this, "_cellSizeAndPositionManager", void 0); (0, _defineProperty2["default"])(this, "_maxScrollSize", void 0); // Favor composition over inheritance to simplify IE10 support this._cellSizeAndPositionManager = new _CellSizeAndPositionManager["default"](params); this._maxScrollSize = maxScrollSize; } (0, _createClass2["default"])(ScalingCellSizeAndPositionManager, [{ key: "areOffsetsAdjusted", value: function areOffsetsAdjusted() { return this._cellSizeAndPositionManager.getTotalSize() > this._maxScrollSize; } }, { key: "configure", value: function configure(params) { this._cellSizeAndPositionManager.configure(params); } }, { key: "getCellCount", value: function getCellCount() { return this._cellSizeAndPositionManager.getCellCount(); } }, { key: "getEstimatedCellSize", value: function getEstimatedCellSize() { return this._cellSizeAndPositionManager.getEstimatedCellSize(); } }, { key: "getLastMeasuredIndex", value: function getLastMeasuredIndex() { return this._cellSizeAndPositionManager.getLastMeasuredIndex(); } /** * Number of pixels a cell at the given position (offset) should be shifted in order to fit within the scaled container. * The offset passed to this function is scaled (safe) as well. */ }, { key: "getOffsetAdjustment", value: function getOffsetAdjustment(_ref2) { var containerSize = _ref2.containerSize, offset = _ref2.offset; var totalSize = this._cellSizeAndPositionManager.getTotalSize(); var safeTotalSize = this.getTotalSize(); var offsetPercentage = this._getOffsetPercentage({ containerSize: containerSize, offset: offset, totalSize: safeTotalSize }); return Math.round(offsetPercentage * (safeTotalSize - totalSize)); } }, { key: "getSizeAndPositionOfCell", value: function getSizeAndPositionOfCell(index) { return this._cellSizeAndPositionManager.getSizeAndPositionOfCell(index); } }, { key: "getSizeAndPositionOfLastMeasuredCell", value: function getSizeAndPositionOfLastMeasuredCell() { return this._cellSizeAndPositionManager.getSizeAndPositionOfLastMeasuredCell(); } /** See CellSizeAndPositionManager#getTotalSize */ }, { key: "getTotalSize", value: function getTotalSize() { return Math.min(this._maxScrollSize, this._cellSizeAndPositionManager.getTotalSize()); } /** See CellSizeAndPositionManager#getUpdatedOffsetForIndex */ }, { key: "getUpdatedOffsetForIndex", value: function getUpdatedOffsetForIndex(_ref3) { var _ref3$align = _ref3.align, align = _ref3$align === void 0 ? 'auto' : _ref3$align, containerSize = _ref3.containerSize, currentOffset = _ref3.currentOffset, targetIndex = _ref3.targetIndex; currentOffset = this._safeOffsetToOffset({ containerSize: containerSize, offset: currentOffset }); var offset = this._cellSizeAndPositionManager.getUpdatedOffsetForIndex({ align: align, containerSize: containerSize, currentOffset: currentOffset, targetIndex: targetIndex }); return this._offsetToSafeOffset({ containerSize: containerSize, offset: offset }); } /** See CellSizeAndPositionManager#getVisibleCellRange */ }, { key: "getVisibleCellRange", value: function getVisibleCellRange(_ref4) { var containerSize = _ref4.containerSize, offset = _ref4.offset; offset = this._safeOffsetToOffset({ containerSize: containerSize, offset: offset }); return this._cellSizeAndPositionManager.getVisibleCellRange({ containerSize: containerSize, offset: offset }); } }, { key: "resetCell", value: function resetCell(index) { this._cellSizeAndPositionManager.resetCell(index); } }, { key: "_getOffsetPercentage", value: function _getOffsetPercentage(_ref5) { var containerSize = _ref5.containerSize, offset = _ref5.offset, totalSize = _ref5.totalSize; return totalSize <= containerSize ? 0 : offset / (totalSize - containerSize); } }, { key: "_offsetToSafeOffset", value: function _offsetToSafeOffset(_ref6) { var containerSize = _ref6.containerSize, offset = _ref6.offset; var totalSize = this._cellSizeAndPositionManager.getTotalSize(); var safeTotalSize = this.getTotalSize(); if (totalSize === safeTotalSize) { return offset; } else { var offsetPercentage = this._getOffsetPercentage({ containerSize: containerSize, offset: offset, totalSize: totalSize }); return Math.round(offsetPercentage * (safeTotalSize - containerSize)); } } }, { key: "_safeOffsetToOffset", value: function _safeOffsetToOffset(_ref7) { var containerSize = _ref7.containerSize, offset = _ref7.offset; var totalSize = this._cellSizeAndPositionManager.getTotalSize(); var safeTotalSize = this.getTotalSize(); if (totalSize === safeTotalSize) { return offset; } else { var offsetPercentage = this._getOffsetPercentage({ containerSize: containerSize, offset: offset, totalSize: safeTotalSize }); return Math.round(offsetPercentage * (totalSize - containerSize)); } } }]); return ScalingCellSizeAndPositionManager; }(); exports["default"] = ScalingCellSizeAndPositionManager;
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