feat: get range context info

docs/guide/command-get.md

@@ -48,6 +48,14 @@ const wordCount = await instance.command.getWordCount()
 const rangeText = instance.command.getRangeText()
 ```
 
+## getRangeContext
+功能：获取选区上下文
+
+用法：
+```javascript
+const rangeContext = instance.command.getRangeContext()
+```
+
 ## getPaperMargin
 功能：获取页边距
 

src/editor/core/command/Command.ts

@@ -80,6 +80,7 @@ export class Command {
   public getValue: CommandAdapt['getValue']
   public getWordCount: CommandAdapt['getWordCount']
   public getRangeText: CommandAdapt['getRangeText']
+  public getRangeContext: CommandAdapt['getRangeContext']
   public getPaperMargin: CommandAdapt['getPaperMargin']
   public getSearchNavigateInfo: CommandAdapt['getSearchNavigateInfo']
 
@@ -168,6 +169,7 @@ export class Command {
     this.getValue = adapt.getValue.bind(adapt)
     this.getWordCount = adapt.getWordCount.bind(adapt)
     this.getRangeText = adapt.getRangeText.bind(adapt)
+    this.getRangeContext = adapt.getRangeContext.bind(adapt)
     this.getCatalog = adapt.getCatalog.bind(adapt)
     this.getPaperMargin = adapt.getPaperMargin.bind(adapt)
     this.getSearchNavigateInfo = adapt.getSearchNavigateInfo.bind(adapt)

src/editor/core/command/CommandAdapt.ts

@@ -16,12 +16,13 @@ import { IAppendElementListOption, IDrawImagePayload, IGetValueOption, IPainterO
 import { IEditorData, IEditorOption, IEditorResult } from '../../interface/Editor'
 import { IElement, IElementStyle } from '../../interface/Element'
 import { IMargin } from '../../interface/Margin'
+import { RangeContext } from '../../interface/Range'
 import { IColgroup } from '../../interface/table/Colgroup'
 import { ITd } from '../../interface/table/Td'
 import { ITr } from '../../interface/table/Tr'
 import { IWatermark } from '../../interface/Watermark'
-import { downloadFile, getUUID } from '../../utils'
-import { formatElementContext, formatElementList, isTextLikeElement } from '../../utils/element'
+import { deepClone, downloadFile, getUUID } from '../../utils'
+import { formatElementContext, formatElementList, isTextLikeElement, pickElementAttr } from '../../utils/element'
 import { printImageBase64 } from '../../utils/print'
 import { Control } from '../draw/control/Control'
 import { Draw } from '../draw/Draw'
@@ -1601,6 +1602,29 @@ export class CommandAdapt {
     return this.range.toString()
   }
 
+  public getRangeContext(): RangeContext | null {
+    const range = this.range.getRange()
+    const { startIndex, endIndex } = range
+    if (!~startIndex && !~endIndex) return null
+    // 选区信息
+    const isCollapsed = startIndex === endIndex
+    // 元素信息
+    const elementList = this.draw.getElementList()
+    const startElement = pickElementAttr(elementList[isCollapsed ? startIndex : startIndex + 1])
+    const endElement = pickElementAttr(elementList[endIndex])
+    // 页码信息
+    const positionList = this.position.getPositionList()
+    const startPageNo = positionList[startIndex].pageNo
+    const endPageNo = positionList[endIndex].pageNo
+    return deepClone({
+      isCollapsed,
+      startElement,
+      endElement,
+      startPageNo,
+      endPageNo
+    })
+  }
+
   public pageMode(payload: PageMode) {
     this.draw.setPageMode(payload)
   }

src/editor/interface/Range.ts

@@ -1,4 +1,5 @@
 import { EditorZone } from '../dataset/enum/Editor'
+import { IElement } from './Element'
 
 export interface IRange {
   startIndex: number;
@@ -15,3 +16,11 @@ export interface IRange {
 export type RangeRowArray = Map<number, number[]>
 
 export type RangeRowMap = Map<number, Set<number>>
+
+export type RangeContext = {
+  isCollapsed: boolean;
+  startElement: IElement;
+  endElement: IElement;
+  startPageNo: number;
+  endPageNo: number;
+}