feat:增加格式刷

src/editor/core/command/Command.ts

@@ -4,6 +4,7 @@ export class Command {
 
   private static undo: Function
   private static redo: Function
+  private static painter: Function
   private static format: Function
   private static bold: Function
   private static print: Function
@@ -11,6 +12,7 @@ export class Command {
   constructor(adapt: CommandAdapt) {
     Command.undo = adapt.undo.bind(adapt)
     Command.redo = adapt.redo.bind(adapt)
+    Command.painter = adapt.painter.bind(adapt)
     Command.print = adapt.print.bind(adapt)
     Command.format = adapt.format.bind(adapt)
     Command.bold = adapt.bold.bind(adapt)
@@ -25,6 +27,10 @@ export class Command {
     return Command.redo()
   }
 
+  public executePainter() {
+    return Command.painter()
+  }
+
   public executeFormat() {
     return Command.format()
   }

src/editor/core/command/CommandAdapt.ts

@@ -1,3 +1,5 @@
+import { ElementStyleKey } from "../../dataset/enum/ElementStyle"
+import { IElementStyle } from "../../interface/Element"
 import { printImageBase64 } from "../../utils/print"
 import { Draw } from "../draw/Draw"
 import { HistoryManager } from "../history/HistoryManager"
@@ -23,30 +25,42 @@ export class CommandAdapt {
     return this.historyManager.redo()
   }
 
-  public format() {
-    const { startIndex, endIndex } = this.range.getRange()
-    if (startIndex === endIndex) return
-    const elementList = this.draw.getElementList()
-    elementList.slice(startIndex + 1, endIndex + 1)
-      .forEach(el => {
-        el.font = ''
-        el.color = ''
-        el.bold = false
-        el.italic = false
-        el.underline = false
-        el.strikeout = false
+  public painter() {
+    const selection = this.range.getSelection()
+    if (!selection) return
+    const painterStyle: IElementStyle = {}
+    selection.forEach(s => {
+      const painterStyleKeys = ['bold', 'color', 'font', 'size', 'italic', 'underline', 'strikeout']
+      painterStyleKeys.forEach(p => {
+        const key = p as keyof typeof ElementStyleKey
+        if (painterStyle[key] === undefined && s[key] !== undefined) {
+          painterStyle[key] = s[key] as any
+        }
       })
+    })
+    this.draw.setPainterStyle(painterStyle)
+  }
+
+  public format() {
+    const selection = this.range.getSelection()
+    if (!selection) return
+    selection.forEach(el => {
+      el.font = ''
+      el.color = ''
+      el.bold = false
+      el.italic = false
+      el.underline = false
+      el.strikeout = false
+    })
     this.draw.render({ isSetCursor: false })
   }
 
   public bold() {
-    const { startIndex, endIndex } = this.range.getRange()
-    if (startIndex === endIndex) return
-    const elementList = this.draw.getElementList()
-    elementList.slice(startIndex + 1, endIndex + 1)
-      .forEach(el => {
-        el.bold = true
-      })
+    const selection = this.range.getSelection()
+    if (!selection) return
+    selection.forEach(el => {
+      el.bold = true
+    })
     this.draw.render({ isSetCursor: false })
   }
 

src/editor/core/draw/Draw.ts

@@ -1,7 +1,7 @@
 import { ZERO } from "../../dataset/constant/Common"
 import { IDrawOption } from "../../interface/Draw"
 import { IEditorOption } from "../../interface/Editor"
-import { IElement, IElementPosition } from "../../interface/Element"
+import { IElement, IElementPosition, IElementStyle } from "../../interface/Element"
 import { IRow } from "../../interface/Row"
 import { deepClone } from "../../utils"
 import { Cursor } from "../cursor/Cursor"
@@ -28,6 +28,7 @@ export class Draw {
   private historyManager: HistoryManager
 
   private rowCount: number
+  private painterStyle: IElementStyle | null
 
   constructor(canvas: HTMLCanvasElement, ctx: CanvasRenderingContext2D, options: Required<IEditorOption>, elementList: IElement[]) {
     this.canvas = canvas
@@ -37,7 +38,7 @@ export class Draw {
 
     this.historyManager = new HistoryManager()
     this.position = new Position(this)
-    this.range = new RangeManager(ctx, options)
+    this.range = new RangeManager(ctx, elementList, options)
     this.margin = new Margin(ctx, options)
     this.background = new Background(ctx)
 
@@ -48,6 +49,7 @@ export class Draw {
     globalEvent.register()
 
     this.rowCount = 0
+    this.painterStyle = null
   }
 
   public getHistoryManager(): HistoryManager {
@@ -78,6 +80,17 @@ export class Draw {
     return this.canvas.toDataURL()
   }
 
+  public getPainterStyle(): IElementStyle | null {
+    return this.painterStyle && Object.keys(this.painterStyle).length ? this.painterStyle : null
+  }
+
+  public setPainterStyle(payload: IElementStyle | null) {
+    this.painterStyle = payload
+    if (this.getPainterStyle()) {
+      this.canvas.style.cursor = 'copy'
+    }
+  }
+
   public render(payload?: IDrawOption) {
     let { curIndex, isSubmitHistory = true, isSetCursor = true } = payload || {}
     // 清除光标

src/editor/core/event/CanvasEvent.ts

@@ -1,4 +1,5 @@
 import { ZERO } from "../../dataset/constant/Common"
+import { ElementStyleKey } from "../../dataset/enum/ElementStyle"
 import { KeyMap } from "../../dataset/enum/Keymap"
 import { IElement } from "../../interface/Element"
 import { writeText } from "../../utils/clipboard"
@@ -45,6 +46,23 @@ export class CanvasEvent {
 
   public setIsAllowDrag(payload: boolean) {
     this.isAllowDrag = payload
+    if (payload === false) {
+      this.canvas.style.cursor = 'text'
+      // 应用格式刷样式
+      const painterStyle = this.draw.getPainterStyle()
+      if (!painterStyle) return
+      const selection = this.range.getSelection()
+      if (!selection) return
+      const painterStyleKeys = Object.keys(painterStyle)
+      selection.forEach(s => {
+        painterStyleKeys.forEach(pKey => {
+          const key = pKey as keyof typeof ElementStyleKey
+          s[key] = painterStyle[key] as any
+        })
+      })
+      this.draw.setPainterStyle(null)
+      this.draw.render({ isSetCursor: false })
+    }
   }
 
   public mousemove(evt: MouseEvent) {
@@ -75,7 +93,7 @@ export class CanvasEvent {
     // 是否还在canvas内部
     const { x, y, width, height } = this.canvas.getBoundingClientRect()
     if (evt.x >= x && evt.x <= x + width && evt.y >= y && evt.y <= y + height) return
-    this.isAllowDrag = false
+    this.setIsAllowDrag(false)
   }
 
   public keydown(evt: KeyboardEvent) {

src/editor/core/range/RangeManager.ts

@@ -1,14 +1,17 @@
 import { IEditorOption } from "../../interface/Editor"
+import { IElement } from "../../interface/Element"
 import { IRange } from "../../interface/Range"
 
 export class RangeManager {
 
   private ctx: CanvasRenderingContext2D
+  private elementList: IElement[]
   private options: Required<IEditorOption>
   private range: IRange
 
-  constructor(ctx: CanvasRenderingContext2D, options: Required<IEditorOption>,) {
+  constructor(ctx: CanvasRenderingContext2D, elementList: IElement[], options: Required<IEditorOption>,) {
     this.ctx = ctx
+    this.elementList = elementList
     this.options = options
     this.range = {
       startIndex: 0,
@@ -20,6 +23,12 @@ export class RangeManager {
     return this.range
   }
 
+  public getSelection(): IElement[] | null {
+    const { startIndex, endIndex } = this.range
+    if (startIndex === endIndex) return null
+    return this.elementList.slice(startIndex + 1, endIndex + 1)
+  }
+
   public setRange(startIndex: number, endIndex: number) {
     this.range.startIndex = startIndex
     this.range.endIndex = endIndex

src/editor/dataset/enum/ElementStyle.ts

@@ -0,0 +1,11 @@
+export enum ElementStyleKey {
+  font = 'font',
+  size = 'size',
+  width = 'width',
+  height = 'height',
+  bold = 'bold',
+  color = 'color',
+  italic = 'italic',
+  underline = 'underline',
+  strikeout = 'strikeout'
+}

src/editor/interface/Element.ts

@@ -1,6 +1,4 @@
-export interface IElement {
-  type?: 'TEXT' | 'IMAGE';
-  value: string;
+export interface IElementStyle {
   font?: string;
   size?: number;
   width?: number;
@@ -12,6 +10,13 @@ export interface IElement {
   strikeout?: boolean;
 }
 
+export interface IElementBasic {
+  type?: 'TEXT' | 'IMAGE';
+  value: string;
+}
+
+export type IElement = IElementBasic & IElementStyle
+
 export interface IElementPosition {
   index: number;
   value: string,