feat: add history max record option #203

docs/guide/option.md

@@ -39,8 +39,8 @@ interface IEditorOption {
   resizerColor?: string; // 图片尺寸器颜色。默认：#4182D9
   resizerSize?: number; // 图片尺寸器大小。默认：5
   marginIndicatorSize?: number; // 页边距指示器长度。默认：35
-  marginIndicatorColor?: string, // 页边距指示器颜色。默认：#BABABA
-  margins?: IMargin, // 页面边距。默认：[100, 120, 100, 120]
+  marginIndicatorColor?: string; // 页边距指示器颜色。默认：#BABABA
+  margins?: IMargin; // 页面边距。默认：[100, 120, 100, 120]
   pageMode?: PageMode; // 纸张模式：连页、分页。默认：分页
   tdPadding?: number; // 单元格内边距。默认：5
   defaultTrMinHeight?: number; // 默认表格行最小高度。默认：40
@@ -50,6 +50,7 @@ interface IEditorOption {
   pageNumber?: IPageNumber; // 页码信息。{bottom:number; size:number; font:string; color:string; rowFlex:RowFlex; format:string; numberType:NumberType;}
   paperDirection?: PaperDirection; // 纸张方向：纵向、横向
   inactiveAlpha?: number; // 正文内容失焦时透明度。默认值：0.6
+  historyMaxRecordCount: number; // 历史（撤销重做）最大记录次数。默认：100次
   watermark?: IWatermark; // 水印信息。{data:string; color?:string; opacity?:number; size?:number; font?:string;}
   control?: IControlOption; // 控件信息。 {placeholderColor?:string; bracketColor?:string; prefix?:string; postfix?:string;}
   checkbox?: ICheckboxOption; // 复选框信息。{width?:number; height?:number; gap?:number; lineWidth?:number; fillStyle?:string; fontStyle?: string;}
@@ -118,4 +119,4 @@ interface IPlaceholder {
   size?: number; // 字体大小。默认：16
   font?: string; // 字体。默认：Yahei
 }
-```
+```

src/editor/core/draw/Draw.ts

@@ -140,7 +140,7 @@ export class Draw {
     this._createPage(0)
 
     this.i18n = new I18n()
-    this.historyManager = new HistoryManager()
+    this.historyManager = new HistoryManager(this)
     this.position = new Position(this)
     this.zone = new Zone(this)
     this.range = new RangeManager(this)

src/editor/core/history/HistoryManager.ts

@@ -1,8 +1,15 @@
+import { Draw } from '../draw/Draw'
+
 export class HistoryManager {
 
-  private readonly MAX_RECORD_COUNT = 1000
   private undoStack: Array<Function> = []
   private redoStack: Array<Function> = []
+  private maxRecordCount: number
+
+  constructor(draw: Draw) {
+    // 忽略第一次历史记录
+    this.maxRecordCount = draw.getOptions().historyMaxRecordCount + 1
+  }
 
   public undo() {
     if (this.undoStack.length > 1) {
@@ -27,7 +34,7 @@ export class HistoryManager {
     if (this.redoStack.length) {
       this.redoStack = []
     }
-    while (this.undoStack.length > this.MAX_RECORD_COUNT) {
+    while (this.undoStack.length > this.maxRecordCount) {
       this.undoStack.shift()
     }
   }

src/editor/index.ts

@@ -125,6 +125,7 @@ export default class Editor {
       defaultHyperlinkColor: '#0000FF',
       paperDirection: PaperDirection.VERTICAL,
       inactiveAlpha: 0.6,
+      historyMaxRecordCount: 100,
       ...options,
       header: headerOptions,
       footer: footerOptions,

src/editor/interface/Editor.ts

@@ -51,6 +51,7 @@ export interface IEditorOption {
   defaultHyperlinkColor?: string;
   paperDirection?: PaperDirection;
   inactiveAlpha?: number;
+  historyMaxRecordCount?: number;
   header?: IHeader;
   footer?: IFooter;
   pageNumber?: IPageNumber;