67 lines
2.0 KiB
Plaintext
67 lines
2.0 KiB
Plaintext
/**
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* 多行选择与批量修改（1.7.8）。
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*
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* 把「对某列统一赋值」展开为逐行变更，交给 TableEditor 记录；
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* 展开时读取每行旧值以保留可回滚信息。
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*/
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import { CellChange } from './TableEditor';
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export class BatchModifier {
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/**
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* 对选定行的某列批量赋值。
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* @param rows 行号列表（会去重并升序）
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* @param column 列名
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* @param newValue 新值
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* @param oldValueOf 读取旧值的回调
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*/
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static applyToRows(rows: number[], column: string, newValue: string,
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oldValueOf: (row: number) => string): CellChange[] {
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const unique: number[] = BatchModifier.normalizeRows(rows);
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const out: CellChange[] = [];
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for (let i = 0; i < unique.length; i++) {
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out.push({
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rowIndex: unique[i],
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column: column,
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oldValue: oldValueOf(unique[i]),
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newValue: newValue
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});
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}
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return out;
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}
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/**
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* 对选定行的多列批量赋值（列到值的映射）。
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* @param values 列名 → 新值
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*/
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static applyMultiple(rows: number[], values: Map<string, string>,
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oldValueOf: (row: number, column: string) => string): CellChange[] {
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const unique: number[] = BatchModifier.normalizeRows(rows);
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const out: CellChange[] = [];
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for (let i = 0; i < unique.length; i++) {
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values.forEach((value: string, column: string) => {
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out.push({
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rowIndex: unique[i],
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column: column,
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oldValue: oldValueOf(unique[i], column),
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newValue: value
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});
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});
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}
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return out;
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}
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/** 行号去重并升序（负数忽略）。 */
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static normalizeRows(rows: number[]): number[] {
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const seen: Set<number> = new Set<number>();
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const out: number[] = [];
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for (let i = 0; i < rows.length; i++) {
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if (rows[i] >= 0 && !seen.has(rows[i])) {
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seen.add(rows[i]);
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out.push(rows[i]);
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}
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}
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out.sort((a: number, b: number) => a - b);
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return out;
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}
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}
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