@almaobservatory/ngx-datatable
Version:
ngx-datatable is an Angular table grid component for presenting large and complex data.
127 lines • 15.9 kB
JavaScript
import { getterForProp } from './column-prop-getters';
import { SortType } from '../types/sort.type';
import { SortDirection } from '../types/sort-direction.type';
/**
* Gets the next sort direction
*/
export function nextSortDir(sortType, current) {
if (sortType === SortType.single) {
if (current === SortDirection.asc) {
return SortDirection.desc;
}
else {
return SortDirection.asc;
}
}
else {
if (!current) {
return SortDirection.asc;
}
else if (current === SortDirection.asc) {
return SortDirection.desc;
}
else if (current === SortDirection.desc) {
return undefined;
}
// avoid TS7030: Not all code paths return a value.
return undefined;
}
}
/**
* Adapted from fueld-ui on 6/216
* https://github.com/FuelInteractive/fuel-ui/tree/master/src/pipes/OrderBy
*/
export function orderByComparator(a, b) {
if (a === null || typeof a === 'undefined')
a = 0;
if (b === null || typeof b === 'undefined')
b = 0;
if (a instanceof Date && b instanceof Date) {
if (a < b)
return -1;
if (a > b)
return 1;
}
else if (isNaN(parseFloat(a)) || !isFinite(a) || isNaN(parseFloat(b)) || !isFinite(b)) {
// Convert to string in case of a=0 or b=0
a = String(a);
b = String(b);
// Isn't a number so lowercase the string to properly compare
if (a.toLowerCase() < b.toLowerCase())
return -1;
if (a.toLowerCase() > b.toLowerCase())
return 1;
}
else {
// Parse strings as numbers to compare properly
if (parseFloat(a) < parseFloat(b))
return -1;
if (parseFloat(a) > parseFloat(b))
return 1;
}
// equal each other
return 0;
}
/**
* creates a shallow copy of the `rows` input and returns the sorted copy. this function
* does not sort the `rows` argument in place
*/
export function sortRows(rows, columns, dirs) {
if (!rows)
return [];
if (!dirs || !dirs.length || !columns)
return [...rows];
/**
* record the row ordering of results from prior sort operations (if applicable)
* this is necessary to guarantee stable sorting behavior
*/
const rowToIndexMap = new Map();
rows.forEach((row, index) => rowToIndexMap.set(row, index));
const temp = [...rows];
const cols = columns.reduce((obj, col) => {
if (col.comparator && typeof col.comparator === 'function') {
obj[col.prop] = col.comparator;
}
return obj;
}, {});
// cache valueGetter and compareFn so that they
// do not need to be looked-up in the sort function body
const cachedDirs = dirs.map(dir => {
const prop = dir.prop;
return {
prop,
dir: dir.dir,
valueGetter: getterForProp(prop),
compareFn: cols[prop] || orderByComparator
};
});
return temp.sort(function (rowA, rowB) {
for (const cachedDir of cachedDirs) {
// Get property and valuegetters for column to be sorted
const { prop, valueGetter } = cachedDir;
// Get A and B cell values from rows based on properties of the columns
const propA = valueGetter(rowA, prop);
const propB = valueGetter(rowB, prop);
// Compare function gets five parameters:
// Two cell values to be compared as propA and propB
// Two rows corresponding to the cells as rowA and rowB
// Direction of the sort for this column as SortDirection
// Compare can be a standard JS comparison function (a,b) => -1|0|1
// as additional parameters are silently ignored. The whole row and sort
// direction enable more complex sort logic.
const comparison = cachedDir.dir !== SortDirection.desc
? cachedDir.compareFn(propA, propB, rowA, rowB, cachedDir.dir)
: -cachedDir.compareFn(propA, propB, rowA, rowB, cachedDir.dir);
// Don't return 0 yet in case of needing to sort by next property
if (comparison !== 0)
return comparison;
}
if (!(rowToIndexMap.has(rowA) && rowToIndexMap.has(rowB)))
return 0;
/**
* all else being equal, preserve original order of the rows (stable sort)
*/
return rowToIndexMap.get(rowA) < rowToIndexMap.get(rowB) ? -1 : 1;
});
}
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{ getterForProp } from './column-prop-getters';\r\nimport { SortType } from '../types/sort.type';\r\nimport { SortDirection } from '../types/sort-direction.type';\r\nimport { SortPropDir } from '../types/sort-prop-dir.type';\r\n/**\r\n * Gets the next sort direction\r\n */\r\nexport function nextSortDir(sortType: SortType, current: SortDirection): SortDirection | undefined {\r\n  if (sortType === SortType.single) {\r\n    if (current === SortDirection.asc) {\r\n      return SortDirection.desc;\r\n    } else {\r\n      return SortDirection.asc;\r\n    }\r\n  } else {\r\n    if (!current) {\r\n      return SortDirection.asc;\r\n    } else if (current === SortDirection.asc) {\r\n      return SortDirection.desc;\r\n    } else if (current === SortDirection.desc) {\r\n      return undefined;\r\n    }\r\n    // avoid TS7030: Not all code paths return a value.\r\n    return undefined;\r\n  }\r\n}\r\n\r\n/**\r\n * Adapted from fueld-ui on 6/216\r\n * https://github.com/FuelInteractive/fuel-ui/tree/master/src/pipes/OrderBy\r\n */\r\nexport function orderByComparator(a: any, b: any): number {\r\n  if (a === null || typeof a === 'undefined') a = 0;\r\n  if (b === null || typeof b === 'undefined') b = 0;\r\n  if (a instanceof Date && b instanceof Date) {\r\n    if (a < b) return -1;\r\n    if (a > b) return 1;\r\n  } else if (isNaN(parseFloat(a)) || !isFinite(a) || isNaN(parseFloat(b)) || !isFinite(b)) {\r\n    // Convert to string in case of a=0 or b=0\r\n    a = String(a);\r\n    b = String(b);\r\n    // Isn't a number so lowercase the string to properly compare\r\n    if (a.toLowerCase() < b.toLowerCase()) return -1;\r\n    if (a.toLowerCase() > b.toLowerCase()) return 1;\r\n  } else {\r\n    // Parse strings as numbers to compare properly\r\n    if (parseFloat(a) < parseFloat(b)) return -1;\r\n    if (parseFloat(a) > parseFloat(b)) return 1;\r\n  }\r\n\r\n  // equal each other\r\n  return 0;\r\n}\r\n\r\n/**\r\n * creates a shallow copy of the `rows` input and returns the sorted copy. this function\r\n * does not sort the `rows` argument in place\r\n */\r\nexport function sortRows(rows: any[], columns: any[], dirs: SortPropDir[]): any[] {\r\n  if (!rows) return [];\r\n  if (!dirs || !dirs.length || !columns) return [...rows];\r\n\r\n  /**\r\n   * record the row ordering of results from prior sort operations (if applicable)\r\n   * this is necessary to guarantee stable sorting behavior\r\n   */\r\n  const rowToIndexMap = new Map<any, number>();\r\n  rows.forEach((row, index) => rowToIndexMap.set(row, index));\r\n\r\n  const temp = [...rows];\r\n  const cols = columns.reduce((obj, col) => {\r\n    if (col.comparator && typeof col.comparator === 'function') {\r\n      obj[col.prop] = col.comparator;\r\n    }\r\n    return obj;\r\n  }, {});\r\n\r\n  // cache valueGetter and compareFn so that they\r\n  // do not need to be looked-up in the sort function body\r\n  const cachedDirs = dirs.map(dir => {\r\n    const prop = dir.prop;\r\n    return {\r\n      prop,\r\n      dir: dir.dir,\r\n      valueGetter: getterForProp(prop),\r\n      compareFn: cols[prop] || orderByComparator\r\n    };\r\n  });\r\n\r\n  return temp.sort(function (rowA: any, rowB: any) {\r\n    for (const cachedDir of cachedDirs) {\r\n      // Get property and valuegetters for column to be sorted\r\n      const { prop, valueGetter } = cachedDir;\r\n      // Get A and B cell values from rows based on properties of the columns\r\n      const propA = valueGetter(rowA, prop);\r\n      const propB = valueGetter(rowB, prop);\r\n\r\n      // Compare function gets five parameters:\r\n      // Two cell values to be compared as propA and propB\r\n      // Two rows corresponding to the cells as rowA and rowB\r\n      // Direction of the sort for this column as SortDirection\r\n      // Compare can be a standard JS comparison function (a,b) => -1|0|1\r\n      // as additional parameters are silently ignored. The whole row and sort\r\n      // direction enable more complex sort logic.\r\n      const comparison =\r\n        cachedDir.dir !== SortDirection.desc\r\n          ? cachedDir.compareFn(propA, propB, rowA, rowB, cachedDir.dir)\r\n          : -cachedDir.compareFn(propA, propB, rowA, rowB, cachedDir.dir);\r\n\r\n      // Don't return 0 yet in case of needing to sort by next property\r\n      if (comparison !== 0) return comparison;\r\n    }\r\n\r\n    if (!(rowToIndexMap.has(rowA) && rowToIndexMap.has(rowB))) return 0;\r\n\r\n    /**\r\n     * all else being equal, preserve original order of the rows (stable sort)\r\n     */\r\n    return rowToIndexMap.get(rowA) < rowToIndexMap.get(rowB) ? -1 : 1;\r\n  });\r\n}\r\n"]}