feat: add page footer

src/editor/assets/css/resizer/resizer.css

@@ -5,6 +5,7 @@
 
 .ce-resizer-selection>div {
   position: absolute;
+  z-index: 9;
   width: 10px;
   height: 10px;
   box-shadow: 0 1px 4px 0 rgb(0 0 0 / 30%);

src/editor/assets/css/zone/zone.css

@@ -1,4 +1,4 @@
-.ce-header-indicator>div {
+.ce-zone-indicator>div {
   padding: 3px 6px;
   color: #000000;
   font-size: 12px;
@@ -7,27 +7,28 @@
   transform-origin: 0 0;
 }
 
-.ce-header-indicator-border__top,
+.ce-zone-indicator-border__top,
-.ce-header-indicator-border__bottom,
+.ce-zone-indicator-border__bottom,
-.ce-header-indicator-border__left,
+.ce-zone-indicator-border__left,
-.ce-header-indicator-border__right {
+.ce-zone-indicator-border__right {
   display: block;
   position: absolute;
+  z-index: 0;
 }
 
-.ce-header-indicator-border__top {
+.ce-zone-indicator-border__top {
   border-top: 2px dashed rgb(238, 238, 238);
 }
 
-.ce-header-indicator-border__bottom {
+.ce-zone-indicator-border__bottom {
   border-top: 2px dashed rgb(238, 238, 238);
   width: 100%;
 }
 
-.ce-header-indicator-border__left {
+.ce-zone-indicator-border__left {
   border-left: 2px dashed rgb(238, 238, 238);
 }
 
-.ce-header-indicator-border__right {
+.ce-zone-indicator-border__right {
   border-right: 2px dashed rgb(238, 238, 238);
 }

src/editor/core/draw/Draw.ts

@@ -51,6 +51,7 @@ import { EDITOR_COMPONENT, EDITOR_PREFIX } from '../../dataset/constant/Editor'
 import { I18n } from '../i18n/I18n'
 import { ImageObserver } from '../observer/ImageObserver'
 import { Zone } from '../zone/Zone'
+import { Footer } from './frame/Footer'
 
 export class Draw {
 
@@ -89,6 +90,7 @@ export class Draw {
   private pageNumber: PageNumber
   private waterMark: Watermark
   private header: Header
+  private footer: Footer
   private hyperlinkParticle: HyperlinkParticle
   private dateParticle: DateParticle
   private separatorParticle: SeparatorParticle
@@ -152,6 +154,7 @@ export class Draw {
     this.pageNumber = new PageNumber(this)
     this.waterMark = new Watermark(this)
     this.header = new Header(this)
+    this.footer = new Footer(this)
     this.hyperlinkParticle = new HyperlinkParticle(this)
     this.dateParticle = new DateParticle(this)
     this.separatorParticle = new SeparatorParticle()
@@ -217,9 +220,14 @@ export class Draw {
 
   public getMainHeight(): number {
     const pageHeight = this.getHeight()
+    return pageHeight - this.getMainOuterHeight()
+  }
+
+  public getMainOuterHeight(): number {
     const margins = this.getMargins()
-    const extraHeight = this.header.getExtraHeight()
+    const headerExtraHeight = this.header.getExtraHeight()
-    return pageHeight - margins[0] - margins[2] - extraHeight
+    const footerExtraHeight = this.footer.getExtraHeight()
+    return margins[0] + margins[2] + headerExtraHeight + footerExtraHeight
   }
 
   public getCanvasWidth(pageNo = -1): number {
@@ -385,9 +393,13 @@ export class Draw {
 
   public getOriginalElementList() {
     const zoneManager = this.getZone()
-    return zoneManager.isHeaderActive()
+    if (zoneManager.isHeaderActive()) {
-      ? this.header.getElementList()
+      return this.header.getElementList()
-      : this.elementList
+    }
+    if (zoneManager.isFooterActive()) {
+      return this.footer.getElementList()
+    }
+    return this.elementList
   }
 
   public getOriginalMainElementList(): IElement[] {
@@ -468,6 +480,10 @@ export class Draw {
     return this.header
   }
 
+  public getFooter(): Footer {
+    return this.footer
+  }
+
   public getHyperlinkParticle(): HyperlinkParticle {
     return this.hyperlinkParticle
   }
@@ -646,7 +662,8 @@ export class Draw {
     // 数据
     const data: IEditorData = {
       header: zipElementList(this.headerElementList),
-      main: zipElementList(this.elementList)
+      main: zipElementList(this.elementList),
+      footer: zipElementList(this.footerElementList)
     }
     return {
       version,
@@ -803,10 +820,8 @@ export class Draw {
         metrics.boundingBoxDescent = elementHeight
         metrics.boundingBoxAscent = 0
         // 表格分页处理(拆分表格)
-        const margins = this.getMargins()
         const height = this.getHeight()
-        const headerExtraHeight = this.header.getExtraHeight()
+        const marginHeight = this.getMainOuterHeight()
-        const marginHeight = margins[0] + margins[2] + headerExtraHeight
         let curPagePreHeight = marginHeight
         for (let r = 0; r < rowList.length; r++) {
           const row = rowList[r]
@@ -973,9 +988,7 @@ export class Draw {
     const pageRowList: IRow[][] = [[]]
     const { pageMode } = this.options
     const height = this.getHeight()
-    const margins = this.getMargins()
+    const marginHeight = this.getMainOuterHeight()
-    const headerExtraHeight = this.header.getExtraHeight()
-    const marginHeight = margins[0] + margins[2] + headerExtraHeight
     let pageHeight = marginHeight
     let pageNo = 0
     if (pageMode === PageMode.CONTINUITY) {
@@ -1196,8 +1209,8 @@ export class Draw {
     const { inactiveAlpha, pageMode } = this.options
     const innerWidth = this.getInnerWidth()
     const ctx = this.ctxList[pageNo]
-    // 判断当前激活区域-激活页眉时主题元素透明度降低
+    // 判断当前激活区域-非正文区域时元素透明度降低
-    ctx.globalAlpha = this.zone.isHeaderActive() ? inactiveAlpha : 1
+    ctx.globalAlpha = !this.zone.isMainActive() ? inactiveAlpha : 1
     this._clearPage(pageNo)
     // 绘制背景
     this.background.render(ctx)
@@ -1218,6 +1231,8 @@ export class Draw {
     this.header.render(ctx, pageNo)
     // 绘制页码
     this.pageNumber.render(ctx, pageNo)
+    // 绘制页脚
+    this.footer.render(ctx, pageNo)
     // 搜索匹配绘制
     if (this.search.getSearchKeyword()) {
       this.search.render(ctx, pageNo)
@@ -1236,7 +1251,6 @@ export class Draw {
       entries.forEach(entry => {
         if (entry.isIntersecting) {
           const index = Number((<HTMLCanvasElement>entry.target).dataset.index)
-          this.header.render(this.ctxList[index], index)
           this._drawPage({
             elementList,
             positionList,
@@ -1278,6 +1292,8 @@ export class Draw {
     if (isCompute) {
       // 页眉信息
       this.header.compute()
+      // 页脚信息
+      this.footer.compute()
       // 行信息
       this.rowList = this.computeRowList(innerWidth, this.elementList)
       // 页面信息
@@ -1338,6 +1354,7 @@ export class Draw {
       const self = this
       const oldElementList = deepClone(this.elementList)
       const oldHeaderElementList = deepClone(this.header.getElementList())
+      const oldFooterElementList = deepClone(this.footer.getElementList())
       const { startIndex, endIndex } = this.range.getRange()
       const pageNo = this.pageNo
       const oldPositionContext = deepClone(positionContext)
@@ -1345,8 +1362,9 @@ export class Draw {
       this.historyManager.execute(function () {
         self.zone.setZone(zone)
         self.setPageNo(pageNo)
-        self.position.setPositionContext(oldPositionContext)
+        self.position.setPositionContext(deepClone(oldPositionContext))
-        self.header.setElementList(oldHeaderElementList)
+        self.header.setElementList(deepClone(oldHeaderElementList))
+        self.footer.setElementList(deepClone(oldFooterElementList))
         self.elementList = deepClone(oldElementList)
         self.range.setRange(startIndex, endIndex)
         self.render({ curIndex, isSubmitHistory: false })
@@ -1359,8 +1377,8 @@ export class Draw {
         this.tableTool.render()
       }
       // 页眉指示器重新渲染
-      if (isCompute && this.zone.isHeaderActive()) {
+      if (isCompute && !this.zone.isMainActive()) {
-        this.zone.drawHeaderZoneIndicator()
+        this.zone.drawZoneIndicator()
       }
       // 页面尺寸改变
       if (this.listener.pageSizeChange) {

src/editor/core/draw/frame/Footer.ts

@@ -0,0 +1,134 @@
+import { maxHeightRadioMapping } from '../../../dataset/constant/Common'
+import { EditorZone } from '../../../dataset/enum/Editor'
+import { DeepRequired } from '../../../interface/Common'
+import { IEditorOption } from '../../../interface/Editor'
+import { IElement, IElementPosition } from '../../../interface/Element'
+import { IRow } from '../../../interface/Row'
+import { Position } from '../../position/Position'
+import { Draw } from '../Draw'
+
+export class Footer {
+
+  private draw: Draw
+  private position: Position
+  private options: DeepRequired<IEditorOption>
+
+  private elementList: IElement[]
+  private rowList: IRow[]
+  private positionList: IElementPosition[]
+
+  constructor(draw: Draw) {
+    this.draw = draw
+    this.position = draw.getPosition()
+    this.options = draw.getOptions()
+
+    this.elementList = draw.getFooterElementList()
+    this.rowList = []
+    this.positionList = []
+  }
+
+  public setElementList(elementList: IElement[]) {
+    this.elementList = elementList
+  }
+
+  public getElementList(): IElement[] {
+    return this.elementList
+  }
+
+  public getPositionList(): IElementPosition[] {
+    return this.positionList
+  }
+
+  public compute() {
+    this._recovery()
+    this._computeRowList()
+    this._computePositionList()
+  }
+
+  private _recovery() {
+    this.rowList = []
+    this.positionList = []
+  }
+
+  private _computeRowList() {
+    const innerWidth = this.draw.getInnerWidth()
+    this.rowList = this.draw.computeRowList(innerWidth, this.elementList)
+  }
+
+  private _computePositionList() {
+    const footerBottom = this.getFooterBottom()
+    const innerWidth = this.draw.getInnerWidth()
+    const margins = this.draw.getMargins()
+    const startX = margins[3]
+    // 页面高度 - 页脚顶部距离页面底部高度
+    const pageHeight = this.draw.getHeight()
+    const footerHeight = this.getHeight()
+    const startY = pageHeight - footerBottom - footerHeight
+    this.position.computePageRowPosition({
+      positionList: this.positionList,
+      rowList: this.rowList,
+      pageNo: 0,
+      startIndex: 0,
+      startX,
+      startY,
+      innerWidth
+    })
+  }
+
+  public getFooterBottom(): number {
+    const { footer: { bottom }, scale } = this.options
+    return Math.floor(bottom * scale)
+  }
+
+  public getMaxHeight(): number {
+    const { footer: { maxHeightRadio } } = this.options
+    const height = this.draw.getHeight()
+    return Math.floor(height * maxHeightRadioMapping[maxHeightRadio])
+  }
+
+  public getHeight(): number {
+    const maxHeight = this.getMaxHeight()
+    const rowHeight = this.getRowHeight()
+    return rowHeight > maxHeight ? maxHeight : rowHeight
+  }
+
+  public getRowHeight(): number {
+    return this.rowList.reduce((pre, cur) => pre + cur.height, 0)
+  }
+
+  public getExtraHeight(): number {
+    // 页脚下边距 + 实际高 - 页面上边距
+    const margins = this.draw.getMargins()
+    const footerHeight = this.getHeight()
+    const footerBottom = this.getFooterBottom()
+    const extraHeight = footerBottom + footerHeight - margins[2]
+    return extraHeight <= 0 ? 0 : extraHeight
+  }
+
+  public render(ctx: CanvasRenderingContext2D, pageNo: number) {
+    ctx.globalAlpha = 1
+    const innerWidth = this.draw.getInnerWidth()
+    const maxHeight = this.getMaxHeight()
+    // 超出最大高度不渲染
+    const rowList: IRow[] = []
+    let curRowHeight = 0
+    for (let r = 0; r < this.rowList.length; r++) {
+      const row = this.rowList[r]
+      if (curRowHeight + row.height > maxHeight) {
+        break
+      }
+      rowList.push(row)
+      curRowHeight += row.height
+    }
+    this.draw.drawRow(ctx, {
+      elementList: this.elementList,
+      positionList: this.positionList,
+      rowList,
+      pageNo,
+      startIndex: 0,
+      innerWidth,
+      zone: EditorZone.FOOTER
+    })
+  }
+
+}

src/editor/core/draw/frame/Header.ts

@@ -1,4 +1,4 @@
-import { maxHeightRadioMapping } from '../../../dataset/constant/Header'
+import { maxHeightRadioMapping } from '../../../dataset/constant/Common'
 import { EditorZone } from '../../../dataset/enum/Editor'
 import { DeepRequired } from '../../../interface/Common'
 import { IEditorOption } from '../../../interface/Editor'

src/editor/core/draw/frame/PageNumber.ts

@@ -32,7 +32,7 @@ export class PageNumber {
     const margins = this.draw.getMargins()
     const { width: textWidth } = ctx.measureText(text)
     if (rowFlex === RowFlex.CENTER) {
-      x = (width + textWidth) / 2
+      x = (width - textWidth) / 2
     } else if (rowFlex === RowFlex.RIGHT) {
       x = width - textWidth - margins[1]
     } else {

src/editor/core/event/handlers/keydown.ts

@@ -262,9 +262,9 @@ export function keydown(evt: KeyboardEvent, host: CanvasEvent) {
   } else if (evt.key === KeyMap.ESC) {
     // 退出格式刷
     host.clearPainterStyle()
-    // 退出页眉编辑
+    // 退出页眉页脚编辑
     const zoneManager = draw.getZone()
-    if (zoneManager.isHeaderActive()) {
+    if (!zoneManager.isMainActive()) {
       zoneManager.setZone(EditorZone.MAIN)
     }
     evt.preventDefault()

src/editor/core/position/Position.ts

@@ -48,8 +48,15 @@ export class Position {
 
   public getOriginalPositionList(): IElementPosition[] {
     const zoneManager = this.draw.getZone()
+    if (zoneManager.isHeaderActive()) {
       const header = this.draw.getHeader()
-    return zoneManager.isHeaderActive() ? header.getPositionList() : this.positionList
+      return header.getPositionList()
+    }
+    if (zoneManager.isFooterActive()) {
+      const footer = this.draw.getFooter()
+      return footer.getPositionList()
+    }
+    return this.positionList
   }
 
   public getOriginalMainPositionList(): IElementPosition[] {
@@ -209,7 +216,8 @@ export class Position {
     }
     const zoneManager = this.draw.getZone()
     const curPageNo = this.draw.getPageNo()
-    const positionNo = zoneManager.isMainActive() ? curPageNo : 0
+    const isMainActive = zoneManager.isMainActive()
+    const positionNo = isMainActive ? curPageNo : 0
     for (let j = 0; j < positionList.length; j++) {
       const { index, pageNo, coordinate: { leftTop, rightTop, leftBottom } } = positionList[j]
       if (positionNo !== pageNo) continue
@@ -306,15 +314,15 @@ export class Position {
       }
     }
     // 判断所属行是否存在元素
-    const firstLetterList = positionList.filter(p => p.isLastLetter && p.pageNo === positionNo)
+    const lastLetterList = positionList.filter(p => p.isLastLetter && p.pageNo === positionNo)
-    for (let j = 0; j < firstLetterList.length; j++) {
+    for (let j = 0; j < lastLetterList.length; j++) {
-      const { index, pageNo, coordinate: { leftTop, leftBottom } } = firstLetterList[j]
+      const { index, pageNo, coordinate: { leftTop, leftBottom } } = lastLetterList[j]
       if (positionNo !== pageNo) continue
       if (y > leftTop[1] && y <= leftBottom[1]) {
         const isHead = x < this.options.margins[3]
         // 是否在头部
         if (isHead) {
-          const headIndex = positionList.findIndex(p => p.pageNo === positionNo && p.rowNo === firstLetterList[j].rowNo)
+          const headIndex = positionList.findIndex(p => p.pageNo === positionNo && p.rowNo === lastLetterList[j].rowNo)
           curPositionIndex = ~headIndex ? headIndex - 1 : index
         } else {
           curPositionIndex = index
@@ -324,18 +332,30 @@ export class Position {
       }
     }
     if (!isLastArea) {
-      // 判断所属位置是否属于header区域，当前位置小于第一行的上边距
+      const mainLastLetterList = isMainActive
-      if (zoneManager.isMainActive()) {
+        ? lastLetterList
-        if (y < firstLetterList[0].coordinate.leftTop[1]) {
+        : this.getOriginalMainPositionList().filter(p => p.isLastLetter && p.pageNo === positionNo)
+      const firstPosition = mainLastLetterList[0]
+      const lastPosition = mainLastLetterList[mainLastLetterList.length - 1]
+      // 判断所属位置是否属于页眉页脚区域
+      if (isMainActive) {
+        // 页眉：当前位置小于第一行的上边距
+        if (y < firstPosition.coordinate.leftTop[1]) {
           return {
             index: -1,
             zone: EditorZone.HEADER
           }
         }
+        // 页脚：当前位置大于最后一行的下边距
+        if (y > lastPosition.coordinate.leftBottom[1]) {
+          return {
+            index: -1,
+            zone: EditorZone.FOOTER
           }
-      // 判断所属位置是否属于main区域，当前位置大于第一行的上边距
+        }
-      if (zoneManager.isHeaderActive()) {
+      } else {
-        if (y > firstLetterList[0].coordinate.leftTop[1]) {
+        // main区域：当前位置大于第一行的上边距 && 小于最后一行的下边距
+        if (y >= firstPosition.coordinate.leftTop[1] && y <= lastPosition.coordinate.leftBottom[1]) {
           return {
             index: -1,
             zone: EditorZone.MAIN
@@ -344,7 +364,7 @@ export class Position {
       }
       // 当前页最后一行
       return {
-        index: firstLetterList[firstLetterList.length - 1]?.index || positionList.length - 1,
+        index: lastLetterList[lastLetterList.length - 1]?.index || positionList.length - 1,
       }
     }
     return {

src/editor/core/zone/Zone.ts

@@ -6,6 +6,7 @@ import { I18n } from '../i18n/I18n'
 
 export class Zone {
 
+  private readonly INDICATOR_PADDING = 2
   private readonly INDICATOR_TITLE_TRANSLATE = [20, 5]
 
   private draw: Draw
@@ -14,7 +15,7 @@ export class Zone {
   private container: HTMLDivElement
 
   private currentZone: EditorZone
-  private headerIndicatorContainer: HTMLDivElement | null
+  private indicatorContainer: HTMLDivElement | null
 
   constructor(draw: Draw) {
     this.draw = draw
@@ -22,7 +23,7 @@ export class Zone {
     this.options = draw.getOptions()
     this.container = draw.getContainer()
     this.currentZone = EditorZone.MAIN
-    this.headerIndicatorContainer = null
+    this.indicatorContainer = null
   }
 
   public isHeaderActive(): boolean {
@@ -33,6 +34,10 @@ export class Zone {
     return this.getZone() === EditorZone.MAIN
   }
 
+  public isFooterActive(): boolean {
+    return this.getZone() === EditorZone.FOOTER
+  }
+
   public getZone(): EditorZone {
     return this.currentZone
   }
@@ -46,74 +51,87 @@ export class Zone {
       isSetCursor: false,
       isCompute: false
     })
-    // 页眉指示器
+    // 指示器
-    if (this.isHeaderActive()) {
+    this.drawZoneIndicator()
-      this.drawHeaderZoneIndicator()
-    } else {
-      this._clearHeaderZoneIndicator()
-    }
   }
 
-  public drawHeaderZoneIndicator() {
+  public drawZoneIndicator() {
-    this._clearHeaderZoneIndicator()
+    this._clearZoneIndicator()
+    if (!this.isHeaderActive() && !this.isFooterActive()) return
     const { scale } = this.options
+    const isHeaderActive = this.isHeaderActive()
     const [offsetX, offsetY] = this.INDICATOR_TITLE_TRANSLATE
-    this.headerIndicatorContainer = document.createElement('div')
-    this.headerIndicatorContainer.classList.add(`${EDITOR_PREFIX}-header-indicator`)
     const pageList = this.draw.getPageList()
     const margins = this.draw.getMargins()
     const innerWidth = this.draw.getInnerWidth()
     const pageHeight = this.draw.getHeight()
     const pageGap = this.draw.getPageGap()
     const preY = pageHeight + pageGap
+    // 创建指示器容器
+    this.indicatorContainer = document.createElement('div')
+    this.indicatorContainer.classList.add(`${EDITOR_PREFIX}-zone-indicator`)
+    // 指示器位置
     const header = this.draw.getHeader()
-    const headerHeight = header.getHeight()
+    const footer = this.draw.getFooter()
-    const headerTop = header.getHeaderTop()
+    const indicatorHeight = isHeaderActive
-
+      ? header.getHeight()
+      : footer.getHeight()
+    const indicatorTop = isHeaderActive
+      ? header.getHeaderTop()
+      : pageHeight - footer.getFooterBottom() - indicatorHeight
     for (let p = 0; p < pageList.length; p++) {
-      const startY = preY * p + headerTop
+      const startY = preY * p + indicatorTop
-      const indicatorTitle = document.createElement('div')
+      const indicatorLeftX = margins[3] - this.INDICATOR_PADDING
+      const indicatorRightX = margins[3] + innerWidth + this.INDICATOR_PADDING
+      const indicatorTopY = isHeaderActive
+        ? startY - this.INDICATOR_PADDING
+        : startY + indicatorHeight + this.INDICATOR_PADDING
+      const indicatorBottomY = isHeaderActive
+        ? startY + indicatorHeight + this.INDICATOR_PADDING
+        : startY - this.INDICATOR_PADDING
       // 标题
-      indicatorTitle.innerText = this.i18n.t('frame.header')
+      const indicatorTitle = document.createElement('div')
-      indicatorTitle.style.top = `${startY + headerHeight}px`
+      indicatorTitle.innerText = this.i18n.t(`frame.${isHeaderActive ? 'header' : 'footer'}`)
+      indicatorTitle.style.top = `${indicatorBottomY}px`
       indicatorTitle.style.transform = `translate(${offsetX * scale}px, ${offsetY * scale}px) scale(${scale})`
-      this.headerIndicatorContainer.append(indicatorTitle)
+      this.indicatorContainer.append(indicatorTitle)
 
       // 上边线
       const lineTop = document.createElement('span')
-      lineTop.classList.add(`${EDITOR_PREFIX}-header-indicator-border__top`)
+      lineTop.classList.add(`${EDITOR_PREFIX}-zone-indicator-border__top`)
-      lineTop.style.top = `${startY}px`
+      lineTop.style.top = `${indicatorTopY}px`
       lineTop.style.width = `${innerWidth}px`
       lineTop.style.marginLeft = `${margins[3]}px`
-      this.headerIndicatorContainer.append(lineTop)
+      this.indicatorContainer.append(lineTop)
 
       // 左边线
       const lineLeft = document.createElement('span')
-      lineLeft.classList.add(`${EDITOR_PREFIX}-header-indicator-border__left`)
+      lineLeft.classList.add(`${EDITOR_PREFIX}-zone-indicator-border__left`)
       lineLeft.style.top = `${startY}px`
-      lineLeft.style.height = `${headerHeight}px`
+      lineLeft.style.height = `${indicatorHeight}px`
-      lineLeft.style.left = `${margins[3]}px`
+      lineLeft.style.left = `${indicatorLeftX}px`
-      this.headerIndicatorContainer.append(lineLeft)
+      this.indicatorContainer.append(lineLeft)
 
       // 下边线
       const lineBottom = document.createElement('span')
-      lineBottom.classList.add(`${EDITOR_PREFIX}-header-indicator-border__bottom`)
+      lineBottom.classList.add(`${EDITOR_PREFIX}-zone-indicator-border__bottom`)
-      lineBottom.style.top = `${startY + headerHeight}px`
+      lineBottom.style.top = `${indicatorBottomY}px`
-      this.headerIndicatorContainer.append(lineBottom)
+      this.indicatorContainer.append(lineBottom)
 
       // 右边线
       const lineRight = document.createElement('span')
-      lineRight.classList.add(`${EDITOR_PREFIX}-header-indicator-border__right`)
+      lineRight.classList.add(`${EDITOR_PREFIX}-zone-indicator-border__right`)
       lineRight.style.top = `${startY}px`
-      lineRight.style.height = `${headerHeight}px`
+      lineRight.style.height = `${indicatorHeight}px`
-      lineRight.style.left = `${margins[3] + innerWidth}px`
+      lineRight.style.left = `${indicatorRightX}px`
-      this.headerIndicatorContainer.append(lineRight)
+      this.indicatorContainer.append(lineRight)
     }
-    this.container.append(this.headerIndicatorContainer)
+    this.container.append(this.indicatorContainer)
   }
 
-  private _clearHeaderZoneIndicator() {
+  private _clearZoneIndicator() {
-    this.headerIndicatorContainer?.remove()
+    this.indicatorContainer?.remove()
-    this.headerIndicatorContainer = null
+    this.indicatorContainer = null
   }
+
 }

src/editor/dataset/constant/Common.ts

@@ -1,4 +1,12 @@
+import { MaxHeightRatio } from '../enum/Common'
+
 export const ZERO = '\u200B'
 export const WRAP = '\n'
 export const HORIZON_TAB = '\t'
 export const NBSP = '\u0020'
+
+export const maxHeightRadioMapping: Record<MaxHeightRatio, number> = {
+  [MaxHeightRatio.HALF]: 1 / 2,
+  [MaxHeightRatio.ONE_THIRD]: 1 / 3,
+  [MaxHeightRatio.QUARTER]: 1 / 4
+}

src/editor/dataset/constant/Footer.ts

@@ -0,0 +1,7 @@
+import { IFooter } from '../../interface/Footer'
+import { MaxHeightRatio } from '../enum/Common'
+
+export const defaultFooterOption: Readonly<Required<IFooter>> = {
+  bottom: 30,
+  maxHeightRadio: MaxHeightRatio.HALF
+}

src/editor/dataset/constant/Header.ts

@@ -1,13 +1,7 @@
 import { IHeader } from '../../interface/Header'
-import { HeaderMaxHeightRatio } from '../enum/Header'
+import { MaxHeightRatio } from '../enum/Common'
 
 export const defaultHeaderOption: Readonly<Required<IHeader>> = {
   top: 30,
-  maxHeightRadio: HeaderMaxHeightRatio.HALF
+  maxHeightRadio: MaxHeightRatio.HALF
-}
-
-export const maxHeightRadioMapping: Record<HeaderMaxHeightRatio, number> = {
-  [HeaderMaxHeightRatio.HALF]: 1 / 2,
-  [HeaderMaxHeightRatio.ONE_THIRD]: 1 / 3,
-  [HeaderMaxHeightRatio.QUARTER]: 1 / 4
 }

src/editor/dataset/enum/Common.ts

@@ -1,4 +1,4 @@
-export enum HeaderMaxHeightRatio {
+export enum MaxHeightRatio {
   HALF = 'half',
   ONE_THIRD = 'one-third',
   QUARTER = 'quarter'

src/editor/index.ts

@@ -35,6 +35,9 @@ import { IPageNumber } from './interface/PageNumber'
 import { defaultPageNumberOption } from './dataset/constant/PageNumber'
 import { VerticalAlign } from './dataset/enum/VerticalAlign'
 import { TableBorder } from './dataset/enum/table/Table'
+import { IFooter } from './interface/Footer'
+import { defaultFooterOption } from './dataset/constant/Footer'
+import { MaxHeightRatio } from './dataset/enum/Common'
 
 export default class Editor {
 
@@ -48,6 +51,10 @@ export default class Editor {
       ...defaultHeaderOption,
       ...options.header
     }
+    const footerOptions: Required<IFooter> = {
+      ...defaultFooterOption,
+      ...options.footer
+    }
     const pageNumberOptions: Required<IPageNumber> = {
       ...defaultPageNumberOption,
       ...options.pageNumber
@@ -105,6 +112,7 @@ export default class Editor {
       inactiveAlpha: 0.6,
       ...options,
       header: headerOptions,
+      footer: footerOptions,
       pageNumber: pageNumberOptions,
       watermark: waterMarkOptions,
       control: controlOptions,
@@ -114,17 +122,19 @@ export default class Editor {
     // 数据处理
     let headerElementList: IElement[] = []
     let mainElementList: IElement[] = []
+    let footerElementList: IElement[] = []
     if (Array.isArray(data)) {
       mainElementList = data
     } else {
       headerElementList = data.header || []
       mainElementList = data.main
+      footerElementList = data.footer || []
     }
-    formatElementList(headerElementList, {
+    [headerElementList, mainElementList, footerElementList]
+      .forEach(elementList => {
+        formatElementList(elementList, {
           editorOptions
         })
-    formatElementList(mainElementList, {
-      editorOptions
       })
     // 监听
     this.listener = new Listener()
@@ -134,7 +144,8 @@ export default class Editor {
       editorOptions,
       {
         header: headerElementList,
-        main: mainElementList
+        main: mainElementList,
+        footer: footerElementList
       },
       this.listener
     )
@@ -177,7 +188,8 @@ export {
   KeyMap,
   BlockType,
   PaperDirection,
-  TableBorder
+  TableBorder,
+  MaxHeightRatio
 }
 
 // 对外类型

src/editor/interface/Editor.ts

@@ -3,6 +3,7 @@ import { EditorMode, PageMode, PaperDirection } from '../dataset/enum/Editor'
 import { ICheckboxOption } from './Checkbox'
 import { IControlOption } from './Control'
 import { ICursorOption } from './Cursor'
+import { IFooter } from './Footer'
 import { IHeader } from './Header'
 import { IMargin } from './Margin'
 import { IPageNumber } from './PageNumber'
@@ -49,6 +50,7 @@ export interface IEditorOption {
   paperDirection?: PaperDirection;
   inactiveAlpha?: number;
   header?: IHeader;
+  footer?: IFooter;
   pageNumber?: IPageNumber;
   watermark?: IWatermark;
   control?: IControlOption;

src/editor/interface/Footer.ts

@@ -0,0 +1,6 @@
+import { MaxHeightRatio } from '../dataset/enum/Common'
+
+export interface IFooter {
+  bottom?: number;
+  maxHeightRadio?: MaxHeightRatio;
+}

src/editor/interface/Header.ts

@@ -1,6 +1,6 @@
-import { HeaderMaxHeightRatio } from '../dataset/enum/Header'
+import { MaxHeightRatio } from '../dataset/enum/Common'
 
 export interface IHeader {
   top?: number;
-  maxHeightRadio?: HeaderMaxHeightRatio;
+  maxHeightRadio?: MaxHeightRatio;
 }

src/main.ts

@@ -26,7 +26,11 @@ window.onload = function () {
         value: '\n',
         type: ElementType.SEPARATOR
       }],
-      main: <IElement[]>data
+      main: <IElement[]>data,
+      footer: [{
+        value: 'canvas-editor',
+        size: 12
+      }]
     },
     options
   )