ms-data-grid
Version:
A powerful, customizable Angular data grid component with advanced features like sorting, filtering, pagination, column pinning, and taskbar actions. Perfect for enterprise applications.
118 lines • 17.2 kB
JavaScript
import { Injectable } from '@angular/core';
import * as i0 from "@angular/core";
export class SwapColumnsService {
constructor() { }
deepClone(obj) {
return JSON.parse(JSON.stringify(obj));
}
flattenColumnsWithPaths(columns) {
const result = [];
const recurse = (cols, currentPath = []) => {
cols.forEach((col, index) => {
const path = [...currentPath, index];
result.push({ col, path });
if (Array.isArray(col.children)) {
recurse(col.children, path);
}
});
};
recurse(columns);
return result;
}
findColumnByIndex(columns, index, flat, _path = [], currentPath = []) {
for (let i = 0; i < columns.length; i++) {
const col = columns[i];
const nextPath = [...currentPath, i];
if (flat[index] === col) {
return { column: col, parent: columns, path: nextPath };
}
if (Array.isArray(col?.children)) {
const result = this.findColumnByIndex(col?.children, index, flat, _path, nextPath);
if (result)
return result;
}
}
return null;
}
insertAtPath(columns, path, newColumn) {
const cloned = this.deepClone(columns);
let current = cloned;
for (let i = 0; i < path.length - 1; i++) {
if (!current[path[i]]?.children) {
current[path[i]].children = [];
}
current = current[path[i]]?.children;
}
const insertIndex = path[path.length - 1];
current.splice(insertIndex, 0, newColumn);
return cloned;
}
removeAtPath(columns, path) {
const cloned = this.deepClone(columns);
let current = cloned;
for (let i = 0; i < path.length - 1; i++) {
if (!current[path[i]]?.children) {
return cloned; // Safety: path is invalid
}
current = current[path[i]]?.children;
}
const removeIndex = path[path.length - 1];
if (Array.isArray(current) && current.length > removeIndex) {
current.splice(removeIndex, 1);
}
return cloned;
}
swapColumnsInTree(currentColumn, columns, fromIndex, toIndex) {
const flat = this.flattenColumnsWithPaths(columns);
if (fromIndex < 0 ||
toIndex < 0 ||
fromIndex >= flat.length ||
toIndex >= flat.length) {
return columns; // invalid indices
}
const fromInfo = this.findColumnByIndex(columns, fromIndex, flat);
const toInfo = this.findColumnByIndex(columns, toIndex, flat);
if (!fromInfo || !toInfo)
return columns;
const fromCol = fromInfo.column;
const toCol = toInfo.column;
let updatedCols = this.removeAtPath(columns, fromInfo.path);
// Case 1: Same parent
if (JSON.stringify(fromInfo.path.slice(0, -1)) ===
JSON.stringify(toInfo.path.slice(0, -1))) {
return this.insertAtPath(updatedCols, toInfo.path, fromCol);
}
// Case 2: Drop target is a group header
if (Array.isArray(toCol?.children)) {
const cloned = this.deepClone(updatedCols);
let parent = cloned;
for (let i = 0; i < toInfo.path.length - 1; i++) {
parent = parent[toInfo.path[i]].children;
}
const target = parent[toInfo.path[toInfo.path.length - 1]];
if (!target.children) {
target.children = [];
}
target.children.push(fromCol);
return cloned;
}
// Case 3: Drop target is a regular column → wrap both into a group
const groupHeader = {
headerName: toCol.headerName || 'Group',
children: [toCol, fromCol],
};
// Remove target from its original location
updatedCols = this.removeAtPath(updatedCols, toInfo.path);
// Insert group at target index
return this.insertAtPath(updatedCols, toInfo.path, groupHeader);
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: SwapColumnsService, deps: [], target: i0.ɵɵFactoryTarget.Injectable }); }
static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: SwapColumnsService, providedIn: 'root' }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: SwapColumnsService, decorators: [{
type: Injectable,
args: [{
providedIn: 'root',
}]
}], ctorParameters: function () { return []; } });
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path: number[] }[] {\r\n    const result: { col: any; path: number[] }[] = [];\r\n\r\n    const recurse = (cols: any[], currentPath: number[] = []) => {\r\n      cols.forEach((col, index) => {\r\n        const path = [...currentPath, index];\r\n        result.push({ col, path });\r\n\r\n        if (Array.isArray(col.children)) {\r\n          recurse(col.children, path);\r\n        }\r\n      });\r\n    };\r\n\r\n    recurse(columns);\r\n    return result;\r\n  }\r\n\r\n  findColumnByIndex(\r\n    columns: any[],\r\n    index: number,\r\n    flat: any[],\r\n    _path: number[][] = [],\r\n    currentPath: number[] = []\r\n  ): { column: any; parent: any[]; path: number[] } | null {\r\n    for (let i = 0; i < columns.length; i++) {\r\n      const col = columns[i];\r\n      const nextPath = [...currentPath, i];\r\n\r\n      if (flat[index] === col) {\r\n        return { column: col, parent: columns, path: nextPath };\r\n      }\r\n\r\n      if (Array.isArray(col?.children)) {\r\n        const result = this.findColumnByIndex(\r\n          col?.children,\r\n          index,\r\n          flat,\r\n          _path,\r\n          nextPath\r\n        );\r\n        if (result) return result;\r\n      }\r\n    }\r\n\r\n    return null;\r\n  }\r\n\r\n  insertAtPath(columns: any[], path: number[], newColumn: any): any[] {\r\n    const cloned = this.deepClone(columns);\r\n    let current = cloned;\r\n\r\n    for (let i = 0; i < path.length - 1; i++) {\r\n      if (!current[path[i]]?.children) {\r\n        current[path[i]]!.children = [];\r\n      }\r\n\r\n      current = current[path[i]]?.children;\r\n    }\r\n\r\n    const insertIndex = path[path.length - 1];\r\n    current.splice(insertIndex, 0, newColumn);\r\n    return cloned;\r\n  }\r\n\r\n  removeAtPath(columns: any[], path: number[]): any[] {\r\n    const cloned = this.deepClone(columns);\r\n    let current = cloned;\r\n\r\n    for (let i = 0; i < path.length - 1; i++) {\r\n      if (!current[path[i]]?.children) {\r\n        return cloned; // Safety: path is invalid\r\n      }\r\n      current = current[path[i]]?.children;\r\n    }\r\n\r\n    const removeIndex = path[path.length - 1];\r\n    if (Array.isArray(current) && current.length > removeIndex) {\r\n      current.splice(removeIndex, 1);\r\n    }\r\n\r\n    return cloned;\r\n  }\r\n\r\n  swapColumnsInTree(\r\n    currentColumn: any,\r\n    columns: any[],\r\n    fromIndex: number,\r\n    toIndex: number\r\n  ): any[] {\r\n    const flat = this.flattenColumnsWithPaths(columns);\r\n\r\n    if (\r\n      fromIndex < 0 ||\r\n      toIndex < 0 ||\r\n      fromIndex >= flat.length ||\r\n      toIndex >= flat.length\r\n    ) {\r\n      return columns; // invalid indices\r\n    }\r\n\r\n    const fromInfo = this.findColumnByIndex(columns, fromIndex, flat);\r\n    const toInfo = this.findColumnByIndex(columns, toIndex, flat);\r\n\r\n    if (!fromInfo || !toInfo) return columns;\r\n\r\n    const fromCol = fromInfo.column;\r\n    const toCol = toInfo.column;\r\n\r\n    let updatedCols = this.removeAtPath(columns, fromInfo.path);\r\n\r\n    // Case 1: Same parent\r\n    if (\r\n      JSON.stringify(fromInfo.path.slice(0, -1)) ===\r\n      JSON.stringify(toInfo.path.slice(0, -1))\r\n    ) {\r\n      return this.insertAtPath(updatedCols, toInfo.path, fromCol);\r\n    }\r\n\r\n    // Case 2: Drop target is a group header\r\n    if (Array.isArray(toCol?.children)) {\r\n      const cloned = this.deepClone(updatedCols);\r\n      let parent = cloned;\r\n\r\n      for (let i = 0; i < toInfo.path.length - 1; i++) {\r\n        parent = parent[toInfo.path[i]].children;\r\n      }\r\n\r\n      const target = parent[toInfo.path[toInfo.path.length - 1]];\r\n      if (!target.children) {\r\n        target.children = [];\r\n      }\r\n\r\n      target.children.push(fromCol);\r\n      return cloned;\r\n    }\r\n\r\n    // Case 3: Drop target is a regular column → wrap both into a group\r\n    const groupHeader = {\r\n      headerName: toCol.headerName || 'Group',\r\n      children: [toCol, fromCol],\r\n    };\r\n\r\n    // Remove target from its original location\r\n    updatedCols = this.removeAtPath(updatedCols, toInfo.path);\r\n\r\n    // Insert group at target index\r\n    return this.insertAtPath(updatedCols, toInfo.path, groupHeader);\r\n  }\r\n}\r\n"]}