From bfc61a8a06b6c2c09fd968767f2a6ccbe280fe55 Mon Sep 17 00:00:00 2001
From: Hufe921 <huangyunfeihufe@hotmail.com>
Date: Thu, 18 May 2023 16:33:34 +0800
Subject: [PATCH] feat: starting page number option

---
 src/editor/core/draw/frame/PageNumber.ts  | 11 ++++++++---
 src/editor/dataset/constant/PageNumber.ts |  4 +++-
 src/editor/interface/PageNumber.ts        |  2 ++
 3 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/src/editor/core/draw/frame/PageNumber.ts b/src/editor/core/draw/frame/PageNumber.ts
index f00f2fd..f57a4bf 100644
--- a/src/editor/core/draw/frame/PageNumber.ts
+++ b/src/editor/core/draw/frame/PageNumber.ts
@@ -18,18 +18,23 @@ export class PageNumber {
   }
 
   public render(ctx: CanvasRenderingContext2D, pageNo: number) {
-    const { pageNumber: { size, font, color, rowFlex, numberType, format }, scale, pageMode } = this.options
+    const {
+      scale,
+      pageMode,
+      pageNumber: { size, font, color, rowFlex, numberType, format, startPageNo, fromPageNo }
+    } = this.options
+    if (pageNo < fromPageNo) return
     // 处理页码格式
     let text = format
     const pageNoReg = new RegExp(FORMAT_PLACEHOLDER.PAGE_NO)
     if (pageNoReg.test(text)) {
-      const realPageNo = pageNo + 1
+      const realPageNo = pageNo + startPageNo - fromPageNo
       const pageNoText = numberType === NumberType.CHINESE ? convertNumberToChinese(realPageNo) : `${realPageNo}`
       text = text.replace(pageNoReg, pageNoText)
     }
     const pageCountReg = new RegExp(FORMAT_PLACEHOLDER.PAGE_COUNT)
     if (pageCountReg.test(text)) {
-      const pageCount = this.draw.getPageCount()
+      const pageCount = this.draw.getPageCount() - fromPageNo
       const pageCountText = numberType === NumberType.CHINESE ? convertNumberToChinese(pageCount) : `${pageCount}`
       text = text.replace(pageCountReg, pageCountText)
     }
diff --git a/src/editor/dataset/constant/PageNumber.ts b/src/editor/dataset/constant/PageNumber.ts
index 29ff43e..b21d1bc 100644
--- a/src/editor/dataset/constant/PageNumber.ts
+++ b/src/editor/dataset/constant/PageNumber.ts
@@ -15,5 +15,7 @@ export const defaultPageNumberOption: Readonly<Required<IPageNumber>> = {
   rowFlex: RowFlex.CENTER,
   format: FORMAT_PLACEHOLDER.PAGE_NO,
   numberType: NumberType.ARABIC,
-  disabled: false
+  disabled: false,
+  startPageNo: 1,
+  fromPageNo: 0
 }
\ No newline at end of file
diff --git a/src/editor/interface/PageNumber.ts b/src/editor/interface/PageNumber.ts
index 17955ae..9ef2495 100644
--- a/src/editor/interface/PageNumber.ts
+++ b/src/editor/interface/PageNumber.ts
@@ -10,4 +10,6 @@ export interface IPageNumber {
   format?: string;
   numberType?: NumberType;
   disabled?: boolean;
+  startPageNo?: number;
+  fromPageNo?: number;
 }
\ No newline at end of file