Merge pull request #6 from Hufe921/feature/superscript-subscript

feature/superscript-subscript

index.html

@@ -57,6 +57,12 @@
         <div class="menu-item__strikeout">
           <i></i>
         </div>
+        <div class="menu-item__superscript">
+          <i></i>
+        </div>
+        <div class="menu-item__subscript">
+          <i></i>
+        </div>
         <div class="menu-item__color">
           <i></i>
           <span></span>

src/assets/images/subscript.svg

@@ -0,0 +1 @@
+<svg version="1.1" id="图层_1" xmlns="http://www.w3.org/2000/svg" x="0" y="0" viewBox="0 0 16 16" xml:space="preserve"><style>.st0{fill:#3d4757}</style><g id="_x30_0-公共_x2F_02工具栏_x2F_subscript"><path id="_x32_" class="st0" d="M15 13.3v.7h-3c0-.3.1-.5.3-.8.2-.2.5-.6 1-1 .4-.3.6-.5.7-.7.1-.2.2-.3.2-.5s-.1-.3-.2-.4c-.1-.1-.2-.1-.4-.1s-.3 0-.4.1-.2.4-.2.7l-.9-.1c.1-.4.2-.7.5-.9.3-.2.6-.3 1-.3s.8.1 1 .3c.3.2.4.5.4.8 0 .2 0 .4-.1.5-.1.2-.2.3-.3.5-.1.1-.3.3-.6.5s-.4.4-.5.4c-.1.1-.1.2-.2.3H15z"/><path id="合并形状" class="st0" d="M7.2 8.5l4 5.5H9.8L6.5 9.4 3.2 14H1.8l4-5.5-4-5.5h1.4l3.3 4.6L9.8 3h1.3L7.2 8.5z"/></g></svg>

src/assets/images/superscript.svg

@@ -0,0 +1 @@
+<svg version="1.1" id="图层_1" xmlns="http://www.w3.org/2000/svg" x="0" y="0" viewBox="0 0 16 16" xml:space="preserve"><style>.st0{fill:#3d4757}</style><g id="_x30_0-公共_x2F_02工具栏_x2F_superscript"><path id="_x32_" class="st0" d="M15 6.3V7h-3c0-.3.1-.5.3-.8.2-.2.5-.6 1-1 .3-.2.6-.5.7-.6.1-.2.2-.3.2-.5s-.1-.3-.2-.4c-.1-.1-.2-.1-.4-.1s-.3 0-.4.1-.2.3-.2.6l-.9-.1c.1-.4.2-.7.5-.9s.6-.3 1-.3.8.1 1 .3c.3.2.4.5.4.8 0 .2 0 .4-.1.5s-.2.4-.4.5c-.1.1-.3.3-.6.5s-.4.4-.4.5c-.1.1-.1.2-.2.3l1.7-.1z"/><path id="合并形状" class="st0" d="M7.4 8.5l4 5.5H10L6.7 9.4 3.4 14H2l4-5.5L2 3h1.4l3.3 4.6L10 3h1.3L7.4 8.5z"/></g></svg>

src/editor/core/command/Command.ts

@@ -20,6 +20,8 @@ export class Command {
   private static italic: Function
   private static underline: Function
   private static strikeout: Function
+  private static superscript: Function
+  private static subscript: Function
   private static color: Function
   private static highlight: Function
   private static left: Function
@@ -60,6 +62,8 @@ export class Command {
     Command.italic = adapt.italic.bind(adapt)
     Command.underline = adapt.underline.bind(adapt)
     Command.strikeout = adapt.strikeout.bind(adapt)
+    Command.superscript = adapt.superscript.bind(adapt)
+    Command.subscript = adapt.subscript.bind(adapt)
     Command.color = adapt.color.bind(adapt)
     Command.highlight = adapt.highlight.bind(adapt)
     Command.left = adapt.rowFlex.bind(adapt)
@@ -148,6 +152,14 @@ export class Command {
     return Command.strikeout()
   }
 
+  public executeSuperscript() {
+    return Command.superscript()
+  }
+
+  public executeSubscript() {
+    return Command.subscript()
+  }
+
   public executeColor(payload: string) {
     return Command.color(payload)
   }

src/editor/core/command/CommandAdapt.ts

@@ -1,5 +1,5 @@
 import { ZERO } from "../../dataset/constant/Common"
-import { EDITOR_ELEMENT_STYLE_ATTR } from "../../dataset/constant/Element"
+import { EDITOR_ELEMENT_STYLE_ATTR, TEXTLIKE_ELEMENT_TYPE } from "../../dataset/constant/Element"
 import { EditorContext } from "../../dataset/enum/Editor"
 import { ElementType } from "../../dataset/enum/Element"
 import { ElementStyleKey } from "../../dataset/enum/ElementStyle"
@@ -181,6 +181,48 @@ export class CommandAdapt {
     this.draw.render({ isSetCursor: false })
   }
 
+  public superscript() {
+    const selection = this.range.getSelection()
+    if (!selection) return
+    const superscriptIndex = selection.findIndex(s => s.type === ElementType.SUPERSCRIPT)
+    selection.forEach(el => {
+      // 取消上标
+      if (~superscriptIndex) {
+        if (el.type === ElementType.SUPERSCRIPT) {
+          el.type = ElementType.TEXT
+          delete el.actualSize
+        }
+      } else {
+        // 设置上标
+        if (!el.type || el.type === ElementType.TEXT || el.type === ElementType.SUBSCRIPT) {
+          el.type = ElementType.SUPERSCRIPT
+        }
+      }
+    })
+    this.draw.render({ isSetCursor: false })
+  }
+
+  public subscript() {
+    const selection = this.range.getSelection()
+    if (!selection) return
+    const subscriptIndex = selection.findIndex(s => s.type === ElementType.SUBSCRIPT)
+    selection.forEach(el => {
+      // 取消下标
+      if (~subscriptIndex) {
+        if (el.type === ElementType.SUBSCRIPT) {
+          el.type = ElementType.TEXT
+          delete el.actualSize
+        }
+      } else {
+        // 设置下标
+        if (!el.type || el.type === ElementType.TEXT || el.type === ElementType.SUPERSCRIPT) {
+          el.type = ElementType.SUBSCRIPT
+        }
+      }
+    })
+    this.draw.render({ isSetCursor: false })
+  }
+
   public color(payload: string) {
     const selection = this.range.getSelection()
     if (!selection) return
@@ -911,8 +953,7 @@ export class CommandAdapt {
       // 搜索文本
       function searchClosure(payload: string | null, type: EditorContext, elementList: IElement[], restArgs?: ISearchResultRestArgs) {
         if (!payload) return
-        const { TEXT, HYPERLINK } = ElementType
-        const text = elementList.map(e => !e.type || e.type === TEXT || e.type === HYPERLINK ? e.value : ZERO)
+        const text = elementList.map(e => !e.type || TEXTLIKE_ELEMENT_TYPE.includes(e.type) ? e.value : ZERO)
           .filter(Boolean)
           .join('')
         const matchStartIndexList = []

src/editor/core/draw/Draw.ts

@@ -28,6 +28,8 @@ import { ISearchResult } from "../../interface/Search"
 import { TableTool } from "./particle/table/TableTool"
 import { HyperlinkParticle } from "./particle/HyperlinkParticle"
 import { Header } from "./frame/Header"
+import { SuperscriptParticle } from "./particle/Superscript"
+import { SubscriptParticle } from "./particle/Subscript"
 
 export class Draw {
 
@@ -58,6 +60,8 @@ export class Draw {
   private pageNumber: PageNumber
   private header: Header
   private hyperlinkParticle: HyperlinkParticle
+  private superscriptParticle: SuperscriptParticle
+  private subscriptParticle: SubscriptParticle
 
   private rowList: IRow[]
   private painterStyle: IElementStyle | null
@@ -98,6 +102,9 @@ export class Draw {
     this.pageNumber = new PageNumber(this)
     this.header = new Header(this)
     this.hyperlinkParticle = new HyperlinkParticle(this)
+    this.superscriptParticle = new SuperscriptParticle()
+    this.subscriptParticle = new SubscriptParticle()
+
     new GlobalObserver(this)
 
     this.canvasEvent = new CanvasEvent(this)
@@ -351,7 +358,9 @@ export class Draw {
 
   private _getFont(el: IElement, scale: number = 1): string {
     const { defaultSize, defaultFont } = this.options
-    return `${el.italic ? 'italic ' : ''}${el.bold ? 'bold ' : ''}${(el.size || defaultSize) * scale}px ${el.font || defaultFont}`
+    const font = el.font || defaultFont
+    const size = el.actualSize || el.size || defaultSize
+    return `${el.italic ? 'italic ' : ''}${el.bold ? 'bold ' : ''}${size * scale}px ${font}`
   }
 
   private _computeRowList(innerWidth: number, elementList: IElement[]) {
@@ -435,12 +444,22 @@ export class Draw {
         metrics.boundingBoxDescent = elementHeight
         metrics.boundingBoxAscent = 0
       } else {
-        metrics.height = (element.size || this.options.defaultSize) * scale
+        // 设置上下标真实字体尺寸
+        const size = element.size || this.options.defaultSize
+        if (element.type === ElementType.SUPERSCRIPT || element.type === ElementType.SUBSCRIPT) {
+          element.actualSize = Math.ceil(size * 0.6)
+        }
+        metrics.height = (element.actualSize || size) * scale
         ctx.font = this._getFont(element)
         const fontMetrics = this.textParticle.measureText(ctx, element)
         metrics.width = fontMetrics.width * scale
         metrics.boundingBoxAscent = (element.value === ZERO ? defaultSize : fontMetrics.actualBoundingBoxAscent) * scale
         metrics.boundingBoxDescent = fontMetrics.actualBoundingBoxDescent * scale
+        if (element.type === ElementType.SUPERSCRIPT) {
+          metrics.boundingBoxAscent += metrics.height / 2
+        } else if (element.type === ElementType.SUBSCRIPT) {
+          metrics.boundingBoxDescent += metrics.height / 2
+        }
       }
       const ascent = metrics.boundingBoxAscent + rowMargin
       const descent = metrics.boundingBoxDescent + rowMargin
@@ -545,6 +564,12 @@ export class Draw {
         } else if (element.type === ElementType.HYPERLINK) {
           this.textParticle.complete()
           this.hyperlinkParticle.render(ctx, element, x, y + offsetY)
+        } else if (element.type === ElementType.SUPERSCRIPT) {
+          this.textParticle.complete()
+          this.superscriptParticle.render(ctx, element, x, y + offsetY)
+        } else if (element.type === ElementType.SUBSCRIPT) {
+          this.textParticle.complete()
+          this.subscriptParticle.render(ctx, element, x, y + offsetY)
         } else {
           this.textParticle.record(ctx, element, x, y + offsetY)
         }

src/editor/core/draw/particle/Subscript.ts

@@ -0,0 +1,15 @@
+import { IRowElement } from "../../../interface/Row"
+
+export class SubscriptParticle {
+
+  public render(ctx: CanvasRenderingContext2D, element: IRowElement, x: number, y: number) {
+    ctx.save()
+    ctx.font = element.style
+    if (element.color) {
+      ctx.fillStyle = element.color
+    }
+    ctx.fillText(element.value, x, y + element.metrics.height / 2)
+    ctx.restore()
+  }
+
+}

src/editor/core/draw/particle/Superscript.ts

@@ -0,0 +1,15 @@
+import { IRowElement } from "../../../interface/Row"
+
+export class SuperscriptParticle {
+
+  public render(ctx: CanvasRenderingContext2D, element: IRowElement, x: number, y: number) {
+    ctx.save()
+    ctx.font = element.style
+    if (element.color) {
+      ctx.fillStyle = element.color
+    }
+    ctx.fillText(element.value, x, y - element.metrics.height / 2)
+    ctx.restore()
+  }
+
+}

src/editor/core/event/CanvasEvent.ts

@@ -368,7 +368,7 @@ export class CanvasEvent {
     if (!this.cursor) return
     const cursorPosition = this.position.getCursorPosition()
     if (!data || !cursorPosition || this.isCompositing) return
-    const { TEXT, HYPERLINK } = ElementType
+    const { TEXT, HYPERLINK, SUBSCRIPT, SUPERSCRIPT } = ElementType
     const text = data.replaceAll(`\n`, ZERO)
     const elementList = this.draw.getElementList()
     const agentDom = this.cursor.getAgentDom()
@@ -389,10 +389,13 @@ export class CanvasEvent {
         value,
         ...restArg
       }
+      const nextElement = elementList[endIndex + 1]
       if (
         element.type === TEXT
         || (!element.type && element.value !== ZERO)
-        || (element.type === HYPERLINK && elementList[endIndex + 1]?.type === HYPERLINK)
+        || (element.type === HYPERLINK && nextElement?.type === HYPERLINK)
+        || (element.type === SUBSCRIPT && nextElement?.type === SUBSCRIPT)
+        || (element.type === SUPERSCRIPT && nextElement?.type === SUPERSCRIPT)
       ) {
         EDITOR_ELEMENT_COPY_ATTR.forEach(attr => {
           const value = element[attr] as never

src/editor/core/range/RangeManager.ts

@@ -1,3 +1,4 @@
+import { ElementType } from "../.."
 import { IEditorOption } from "../../interface/Editor"
 import { IElement } from "../../interface/Element"
 import { IRange } from "../../interface/Range"
@@ -65,6 +66,8 @@ export class RangeManager {
     }
     const curElement = curElementList[curElementList.length - 1]
     if (!curElement) return
+    // 类型
+    const type = curElement.type || ElementType.TEXT
     // 富文本
     const font = curElement.font || this.options.defaultFont
     let bold = !~curElementList.findIndex(el => !el.bold)
@@ -80,6 +83,7 @@ export class RangeManager {
     const undo = this.historyManager.isCanUndo()
     const redo = this.historyManager.isCanRedo()
     this.listener.rangeStyleChange({
+      type,
       undo,
       redo,
       painter,
@@ -103,6 +107,7 @@ export class RangeManager {
     const undo = this.historyManager.isCanUndo()
     const redo = this.historyManager.isCanRedo()
     this.listener.rangeStyleChange({
+      type: null,
       undo,
       redo,
       painter,

src/editor/dataset/constant/Element.ts

@@ -1,3 +1,4 @@
+import { ElementType } from "../enum/Element"
 import { IElement } from "../../interface/Element"
 
 export const EDITOR_ELEMENT_STYLE_ATTR = [
@@ -44,3 +45,10 @@ export const EDITOR_ELEMENT_ZIP_ATTR: Array<keyof IElement> = [
   'colgroup',
   'valueList'
 ]
+
+export const TEXTLIKE_ELEMENT_TYPE: ElementType[] = [
+  ElementType.TEXT,
+  ElementType.HYPERLINK,
+  ElementType.SUBSCRIPT,
+  ElementType.SUPERSCRIPT
+]

src/editor/dataset/enum/Element.ts

@@ -2,5 +2,7 @@ export enum ElementType {
   TEXT = 'text',
   IMAGE = 'image',
   TABLE = 'table',
-  HYPERLINK = 'hyperlink'
+  HYPERLINK = 'hyperlink',
+  SUPERSCRIPT = 'superscript',
+  SUBSCRIPT = 'subscript'
 }

src/editor/interface/Element.ts

@@ -43,7 +43,11 @@ export interface IHyperlinkElement {
 
 export type ITable = ITableAttr & ITableElement
 
-export type IElement = IElementBasic & IElementStyle & ITable & IHyperlinkElement
+export interface ISuperscriptSubscript {
+  actualSize?: number;
+}
+
+export type IElement = IElementBasic & IElementStyle & ITable & IHyperlinkElement & ISuperscriptSubscript
 
 export interface IElementMetrics {
   width: number;

src/editor/interface/Listener.ts

@@ -1,7 +1,9 @@
+import { ElementType } from ".."
 import { RowFlex } from "../dataset/enum/Row"
 import { IEditorResult } from "./Editor"
 
 export interface IRangeStype {
+  type: ElementType | null;
   undo: boolean;
   redo: boolean;
   painter: boolean;

src/editor/utils/clipboard.ts

@@ -1,5 +1,6 @@
-import { ElementType, IElement } from ".."
+import { IElement } from ".."
 import { ZERO } from "../dataset/constant/Common"
+import { TEXTLIKE_ELEMENT_TYPE } from "../dataset/constant/Element"
 
 export function writeText(text: string) {
   if (!text) return
@@ -7,9 +8,8 @@ export function writeText(text: string) {
 }
 
 export function writeTextByElementList(elementList: IElement[]) {
-  const { TEXT, HYPERLINK } = ElementType
   const text = elementList
-    .map(p => !p.type || p.type === TEXT || p.type === HYPERLINK ? p.value : '')
+    .map(p => !p.type || TEXTLIKE_ELEMENT_TYPE.includes(p.type) ? p.value : '')
     .join('')
   writeText(text)
 }

src/main.ts

@@ -81,7 +81,15 @@ window.onload = function () {
     }],
     url: 'https://hufe.club/canvas-editor'
   })
-  data.splice(592, 0, {
+  data.splice(383, 0, {
+    value: '轻',
+    type: ElementType.SUBSCRIPT
+  })
+  data.splice(392, 0, {
+    value: '急',
+    type: ElementType.SUPERSCRIPT
+  })
+  data.splice(594, 0, {
     value: `data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFkAAAAgCAYAAAB5JtSmAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAQ0SURBVGhD7dhrUSNBFAVgvKACEVjAAhJQgAIUYAABGEAABvgfAdn6UnWou01PppOZhIXNj1P9vo9zH5PK1Waz2V5wWlxIPgMuJJ8Bi0h+fn7eXl9fb29ubrYPDw/dO/8DHh8fu/vB4kym4Orqaofb29vund8OSSbhemewSrugBMnG3vlvw9vb265yn56edmtz/t/f33+5C8MkixQSZSsl9UzLOHUmcwTYAN/Rpl5eXnY+pnIB0Xd3d7s5m3rvDsrkCGszNiQ7r/tr4v39fSc/uipOqRcqufTHBiO78GGdzG5xcLtIFmVde7L9NsvXRo9s84+Pj+79pUAwn5GcD1wIz5r+fYGeJdnjGiF9hwL7iWAcfX19/evtKVHJXrtN8Rf4A3TVczqhrut5i1mSZQgnIriSWtdzP2N+EvIhi3/GWqHWtWXuy2IYbheiKarJZIZknkxyrryc2Utrgal+9S8iScUXIx/3kcxfe/jotcuDezLFlIbARDrzHpytXdKnQr4xyc74Vu9YV5Ih2Q/tT7mDSEYw5ZU4wu3nJx64k/1z9umlUG0hah/JSbC6Jzi5exDJWoTHERoBxu8uf/pT1j3HDkUIJitjbRfRA/iwVzlgy1RCfSF5ili9xj7BUWKs9wJZ3MpditYu+lsc+/PRx53cVF9Pdg/syE9Hb6cS75PkmhUEUFofmTvLGEXKimHueJP9Y3swWQwGLUiA9xEbHKuvgs4pPe1+1myTAKlw81buJ8kigjAXKauXPLQPhEYgJSEYsgdTUR0BmTVgc6C359wcvKGnBrGO8dO5VlD1ZZ519nrBHvrwKVMCas9hgL0YUI2wV98fC4FqCWizzXyqF44A0ZKLHkilgvPs1zbiTuZIdZ414KvqGCKZYx4zple+MSrrJVncAyL02/TOqncJwVMglx5zI4QDZ5WPvBGEcNP+7TlEcqJIAQFGsIdQjmZt7MlYA5yiI3pOQTCQXUm2TuVmXgmewxDJQDgl6deJJoU5y7p9uwZagmu1mCvbNoOOBfkhOf6lRZjzPb8qRjBMMiUhM9GNMZQq5/oRXBP7Mlj/i12A7EMIaJGqDcl8I79+/N1xTvdINQ2TDAQSvI9Md479vdqCHKSFQKAfEmgBqCTDkjaSgOZXQkg2jy1ti0xApnBQJo/0obQRipeQXbN3CmxKGQch5xgki4Efghl/kFqzPD//2DnXIodIRpaoETaXxcmwGNO7N4I2Oyuc6b+xK/tL9IH3kY/E+r1JdST4yM+7VUiuJbuPZHBeHZcNvXtziMMV9mRuvUOX8Vg9IFjRx9dUYM3s2oJyNx9ahFfSWwyRHKHG3nmL2q/mojyFVAWnEdi2Hg7OBXwUCCKr1QEtoe0+/9jI3xqIiuF2QRD0zqcwpfQnge9TVSI4tWrNe79shj98F0xDC0N4bTUVF5LPgAvJJ8dm+wcP2iJuZNdC5QAAAABJRU5ErkJggg==`,
     width: 89,
     height: 32,
@@ -263,6 +271,16 @@ window.onload = function () {
     console.log('strikeout')
     instance.command.executeStrikeout()
   }
+  const superscriptDom = document.querySelector<HTMLDivElement>('.menu-item__superscript')!
+  superscriptDom.onclick = function () {
+    console.log('superscript')
+    instance.command.executeSuperscript()
+  }
+  const subscriptDom = document.querySelector<HTMLDivElement>('.menu-item__subscript')!
+  subscriptDom.onclick = function () {
+    console.log('subscript')
+    instance.command.executeSubscript()
+  }
   const colorControlDom = document.querySelector<HTMLInputElement>('#color')!
   colorControlDom.onchange = function () {
     instance.command.executeColor(colorControlDom!.value)
@@ -479,6 +497,9 @@ window.onload = function () {
 
   // 内部事件监听
   instance.listener.rangeStyleChange = function (payload) {
+    // 控件类型
+    payload.type === ElementType.SUBSCRIPT ? subscriptDom.classList.add('active') : subscriptDom.classList.remove('active')
+    payload.type === ElementType.SUPERSCRIPT ? superscriptDom.classList.add('active') : superscriptDom.classList.remove('active')
     // 富文本
     const curFontDom = fontOptionDom.querySelector<HTMLLIElement>(`[data-family=${payload.font}]`)!
     fontSelectDom.innerText = curFontDom.innerText

src/style.css

@@ -213,6 +213,14 @@ ul {
   background-image: url('./assets/images/strikeout.svg');
 }
 
+.menu-item__superscript i {
+  background-image: url('./assets/images/superscript.svg');
+}
+
+.menu-item__subscript i {
+  background-image: url('./assets/images/subscript.svg');
+}
+
 .menu-item__color,
 .menu-item__highlight {
   display: flex;