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All rights reserved.\n * This file is licensed to you under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License. You may obtain a copy\n * of the License at http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software distributed under\n * the License is distributed on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS\n * OF ANY KIND, either express or implied. See the License for the specific language\n * governing permissions and limitations under the License.\n */\n\nimport {ColumnSize} from './Column';\nimport {Key} from '@react-types/shared';\n\n// numbers and percents are considered static. *fr units or a lack of units are considered dynamic.\nexport function isStatic(width?: ColumnSize | null): boolean {\n  return width != null && (!isNaN(width as number) || String(width).match(/^(\\d+)(?=%$)/) !== null);\n}\n\nexport function parseFractionalUnit(width?: ColumnSize | null): number {\n  if (!width || typeof width === 'number') {\n    return 1;\n  }\n  let match = width.match(/^(.+)(?=fr$)/);\n  // if width is the incorrect format, just default it to a 1fr\n  if (!match) {\n    if (process.env.NODE_ENV !== 'production') {\n      console.warn(\n        `width: ${width} is not a supported format, width should be a number (ex. 150), percentage (ex. '50%') or fr unit (ex. '2fr')`,\n        \"defaulting to '1fr'\"\n      );\n    }\n    return 1;\n  }\n  return parseFloat(match[0]);\n}\n\nexport function parseStaticWidth(width: number | string, tableWidth: number): number {\n  if (typeof width === 'string') {\n    let match = width.match(/^(\\d+)(?=%$)/);\n    if (!match) {\n      throw new Error('Only percentages or numbers are supported for static column widths');\n    }\n    return tableWidth * (parseFloat(match[0]) / 100);\n  }\n  return width;\n}\n\nexport function getMaxWidth(\n  maxWidth: number | string | null | undefined,\n  tableWidth: number\n): number {\n  return maxWidth != null ? parseStaticWidth(maxWidth, tableWidth) : Number.MAX_SAFE_INTEGER;\n}\n\n// cannot support FR units, we'd need to know everything else in the table to do that\nexport function getMinWidth(minWidth: number | string, tableWidth: number): number {\n  return minWidth != null ? parseStaticWidth(minWidth, tableWidth) : 0;\n}\n\nexport interface IColumn {\n  minWidth?: number | string;\n  maxWidth?: number | string;\n  width?: number | string;\n  defaultWidth?: number | string;\n  key: Key;\n}\n\ninterface FlexItem {\n  frozen: boolean;\n  baseSize: number;\n  hypotheticalMainSize: number;\n  min: number;\n  max: number;\n  flex: number;\n  targetMainSize: number;\n  violation: number;\n}\n\n/**\n * Implements the flex algorithm described in https://www.w3.org/TR/css-flexbox-1/#layout-algorithm\n * It makes a few constraint/assumptions: 1. All basis values are 0 unless it is a static width,\n * then the basis is the static width 2. All flex grow and shrink values are equal to the FR\n * specified on the column, grow and shrink for the same column are equal 3. We only have one row An\n * example of the setup can be seen here https://jsfiddle.net/snowystinger/wv0ymjaf/61/ where I let\n * the browser figure out the flex of the columns. Note: We differ in one key aspect, all of our\n * column widths must be whole numbers, so we avoid browser sub pixel rounding errors. To do this,\n * we use a cascading rounding algorithm to ensure that the sum of the widths is maintained while\n * distributing the rounding remainder across the columns.\n *\n * As noted in the chrome source code, this algorithm is very accurate, but has the potential to be\n * quadratic. They have deemed this to be acceptable because the number of elements is usually small\n * and the flex factors are usually not high variance. I believe we can make the same assumptions.\n * Particularly once resizing is started, it will convert all columns to the left to static widths,\n * so it will cut down on the number of FR columns.\n *\n * There are likely faster ways to do this, I've chosen to stick to the spec as closely as possible\n * for readability, accuracy, and for the note that this behaving quadratically is unlikely to be a\n * problem.\n *\n * @param availableWidth - The visible width of the table.\n * @param columns - The table defined columns.\n * @param changedColumns - Any columns we want to override, for example, during resizing.\n * @param getDefaultWidth - A function that returns the default width of a column by its index.\n * @param getDefaultMinWidth - A function that returns the default min width of a column by its\n *   index.\n */\nexport function calculateColumnSizes(\n  availableWidth: number,\n  columns: IColumn[],\n  changedColumns: Map<Key, ColumnSize>,\n  getDefaultWidth?: (index: number) => ColumnSize | null | undefined,\n  getDefaultMinWidth?: (index: number) => ColumnSize | null | undefined\n): number[] {\n  let hasNonFrozenItems = false;\n  let flexItems: FlexItem[] = columns.map((column, index) => {\n    let width: ColumnSize = (\n      changedColumns.get(column.key) != null\n        ? (changedColumns.get(column.key) ?? '1fr')\n        : (column.width ?? column.defaultWidth ?? getDefaultWidth?.(index) ?? '1fr')\n    ) as ColumnSize;\n    let frozen = false;\n    let baseSize = 0;\n    let flex = 0;\n    let targetMainSize = 0;\n    if (isStatic(width)) {\n      baseSize = parseStaticWidth(width, availableWidth);\n      frozen = true;\n    } else {\n      flex = parseFractionalUnit(width);\n      if (flex <= 0) {\n        frozen = true;\n      }\n    }\n\n    let min = getMinWidth(column.minWidth ?? getDefaultMinWidth?.(index) ?? 0, availableWidth);\n    let max = getMaxWidth(column.maxWidth, availableWidth);\n    let hypotheticalMainSize = Math.max(min, Math.min(baseSize, max));\n\n    // 9.7.1\n    // We don't make use of flex basis, it's always 0, so we are always in 'grow' mode.\n    // 9.7.2\n    if (frozen) {\n      targetMainSize = hypotheticalMainSize;\n    } else if (baseSize > hypotheticalMainSize) {\n      frozen = true;\n      targetMainSize = hypotheticalMainSize;\n    }\n\n    // 9.7.3\n    if (!frozen) {\n      hasNonFrozenItems = true;\n    }\n    return {\n      frozen,\n      baseSize,\n      hypotheticalMainSize,\n      min,\n      max,\n      flex,\n      targetMainSize,\n      violation: 0\n    };\n  });\n\n  // 9.7.4\n  // 9.7.4.a\n  while (hasNonFrozenItems) {\n    // 9.7.4.b\n    /**\n     * Calculate the remaining free space as for initial free space,\n     * above (9.7.3). If the sum of the unfrozen flex items’ flex factors is\n     * less than one, multiply the initial free space by this sum (of flex factors).\n     * If the magnitude of this value is less than the magnitude of\n     * the remaining free space, use this as the remaining free space.\n     */\n    let usedWidth = 0;\n    let flexFactors = 0;\n    flexItems.forEach(item => {\n      if (item.frozen) {\n        usedWidth += item.targetMainSize;\n      } else {\n        usedWidth += item.baseSize;\n        flexFactors += item.flex;\n      }\n    });\n\n    let remainingFreeSpace = availableWidth - usedWidth;\n    // we only support integer FR's, and because of hasNonFrozenItems, we know that flexFactors > 0\n    // so no need to check for flexFactors < 1\n    // 9.7.4.c\n    /**\n     * If the remaining free space is zero\n     * - Do nothing.\n     * Else // remember, we're always in grow mode\n     * - Find the ratio of the item’s flex grow factor to the\n     * sum of the flex grow factors of all unfrozen items on\n     * the line. Set the item’s target main size to its flex\n     * base size plus a fraction of the remaining free space\n     * proportional to the ratio.\n     */\n    if (remainingFreeSpace > 0) {\n      flexItems.forEach(item => {\n        if (!item.frozen) {\n          let ratio = item.flex / flexFactors;\n          item.targetMainSize = item.baseSize + ratio * remainingFreeSpace;\n        }\n      });\n    }\n\n    // 9.7.4.d\n    /**\n     * Fix min/max violations. Clamp each non-frozen item’s\n     * target main size by its used min and max main sizes\n     * and floor its content-box size at zero. If the item’s\n     * target main size was made smaller by this, it’s a max\n     * violation. If the item’s target main size was made\n     * larger by this, it’s a min violation.\n     */\n    let totalViolation = 0;\n    flexItems.forEach(item => {\n      item.violation = 0;\n      if (!item.frozen) {\n        let {min, max, targetMainSize} = item;\n        item.targetMainSize = Math.max(min, Math.min(targetMainSize, max));\n\n        item.violation = item.targetMainSize - targetMainSize;\n        totalViolation += item.violation;\n      }\n    });\n\n    // 9.7.4.e\n    /**\n     * Freeze over-flexed items. The total violation is the\n     * sum of the adjustments from the previous step\n     * ∑(clamped size - unclamped size). If the total violation is:\n     * Zero\n     * - Freeze all items.\n     *\n     * Positive\n     * - Freeze all the items with min violations.\n     *\n     * Negative\n     * - Freeze all the items with max violations.\n     */\n    hasNonFrozenItems = false;\n    flexItems.forEach(item => {\n      if (totalViolation === 0 || Math.sign(totalViolation) === Math.sign(item.violation)) {\n        item.frozen = true;\n      } else if (!item.frozen) {\n        hasNonFrozenItems = true;\n      }\n    });\n  }\n\n  return cascadeRounding(flexItems);\n}\n\nfunction cascadeRounding(flexItems: FlexItem[]): number[] {\n  /*\n  Given an array of floats that sum to an integer, this rounds the floats\n  and returns an array of integers with the same sum.\n  */\n\n  let fpTotal = 0;\n  let intTotal = 0;\n  let roundedArray: number[] = [];\n  flexItems.forEach(function (item) {\n    let float = item.targetMainSize;\n    let integer = Math.round(float + fpTotal) - intTotal;\n    fpTotal += float;\n    intTotal += integer;\n    roundedArray.push(integer);\n  });\n\n  return roundedArray;\n}\n"],"names":[],"version":3,"file":"TableUtils.cjs.map"}