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ZhengDaoWangZhengDaoWang
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Merge pull request #37 from dotnet-campus/t/lindexi/Demo
加上示例代码
2 parents 2b3668c + a562af5 commit 98b9b0f

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‎Directory.Build.props‎

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<Description>A dotnet tool to assist in editing Office document files</Description>
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<RepositoryType>git</RepositoryType>
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<Copyright>Copyright © 2020-2021 dotnet campus, All Rights Reserved.</Copyright>
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<Copyright>Copyright © 2020-2022 dotnet campus, All Rights Reserved.</Copyright>
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</PropertyGroup>
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</Project>

‎README.md‎

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### Usage
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See [DocumentFormat.OpenXml.Flatten README.md](src/DocumentFormat.OpenXml.Flatten/README.md)
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See [DocumentFormat.OpenXml.Flatten README.md](src/DocumentFormat.OpenXml.Flatten/README.md) and the [Demo](demo).
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# Thanks

‎README.zh-cn.md‎

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### 使用方法
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具体使用方法请参阅 [DocumentFormat.OpenXml.Flatten 使用文档](src/DocumentFormat.OpenXml.Flatten/README.md)
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具体使用方法请参阅 [DocumentFormat.OpenXml.Flatten 使用文档](src/DocumentFormat.OpenXml.Flatten/README.md) 和[示例代码](demo)
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# 感谢
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‎demo/DocumentFormat.OpenXml.Flatten.Demo/MAUI/MauiPptxViewerCore/DocumentModel.cs‎

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using DocumentFormat.OpenXml.Packaging;
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using DocumentFormat.OpenXml.Presentation;
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namespace MauiPptxViewerCore;
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record DocumentModel(PresentationDocument PresentationDocument, Presentation Presentation)
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{
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public PresentationPart PresentationPart
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// 这里能拿到 Presentation 那就一定能拿到 PresentationPart 对象，一定不是空
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=> Presentation.PresentationPart!;
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}

‎demo/DocumentFormat.OpenXml.Flatten.Demo/MAUI/MauiPptxViewerCore/MauiPptxViewerCore.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFramework>net6.0</TargetFramework>
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<ImplicitUsings>enable</ImplicitUsings>
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<Nullable>enable</Nullable>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Microsoft.Maui.Graphics" Version="6.0.501" />
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</ItemGroup>
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<ItemGroup>
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<ProjectReference Include="..\..\..\..\src\DocumentFormat.OpenXml.Flatten\DocumentFormat.OpenXml.Flatten\dotnetCampus.DocumentFormat.OpenXml.Flatten.csproj" />
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</ItemGroup>
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</Project>

‎demo/DocumentFormat.OpenXml.Flatten.Demo/MAUI/MauiPptxViewerCore/PptxDocument.cs‎

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using System.Diagnostics;
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using DocumentFormat.OpenXml.Packaging;
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using DocumentFormat.OpenXml.Presentation;
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namespace MauiPptxViewerCore;
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class PptxDocument
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{
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public PptxDocument(DocumentModel documentModel)
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{
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DocumentModel = documentModel;
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var slideIdList = documentModel.Presentation.SlideIdList;
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if (slideIdList is null)
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{
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// 这个文档连一页都没有…
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throw new ArgumentException($"The Empty document. The number of slide is 0.");
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}
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var presentationPart = documentModel.PresentationPart;
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var pptxSlideList = new List<PptxSlide>();
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// [dotnet OpenXML 幻灯片 PPTX 的 Slide Id 和页面序号的关系](https://blog.lindexi.com/post/dotnet-OpenXML-%E5%B9%BB%E7%81%AF%E7%89%87-PPTX-%E7%9A%84-Slide-Id-%E5%92%8C%E9%A1%B5%E9%9D%A2%E5%BA%8F%E5%8F%B7%E7%9A%84%E5%85%B3%E7%B3%BB.html)
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foreach (var slideId in slideIdList.ChildElements.OfType<SlideId>())
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{
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// 获取页面内容
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Debug.Assert(slideId.RelationshipId != null, "slideId.RelationshipId != null");
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SlidePart slidePart = (SlidePart) presentationPart.GetPartById(slideId.RelationshipId!);
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Debug.Assert(slideId.Id is not null, "slideId.Id != null");
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var pptxSlide = new PptxSlide(slideId.Id!.Value, slidePart, documentModel);
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pptxSlideList.Add(pptxSlide);
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}
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SlideList = pptxSlideList;
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}
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public DocumentModel DocumentModel { get; }
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public List<PptxSlide> SlideList { get; }
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}

‎demo/DocumentFormat.OpenXml.Flatten.Demo/MAUI/MauiPptxViewerCore/PptxSlide.cs‎

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using DocumentFormat.OpenXml;
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using DocumentFormat.OpenXml.Drawing;
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using DocumentFormat.OpenXml.Flatten;
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using DocumentFormat.OpenXml.Flatten.ElementConverters.CommonElement;
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using DocumentFormat.OpenXml.Flatten.ElementConverters.Primitive;
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using DocumentFormat.OpenXml.Flatten.ElementConverters.ShapeGeometryConverters;
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using DocumentFormat.OpenXml.Flatten.Framework.Context;
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using DocumentFormat.OpenXml.Packaging;
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using dotnetCampus.OpenXmlUnitConverter;
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using MauiPptxViewerCore.Utils;
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using Microsoft.Maui.Graphics;
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using Shape = DocumentFormat.OpenXml.Presentation.Shape;
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namespace MauiPptxViewerCore;
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public class PptxSlide
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{
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internal PptxSlide(uint slideId, SlidePart slidePart, DocumentModel documentModel)
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{
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SlideId = slideId;
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SlidePart = slidePart;
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DocumentModel = documentModel;
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}
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public UInt32 SlideId { get; }
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public SlidePart SlidePart { get; }
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private DocumentModel DocumentModel { get; }
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public void Render(ICanvas canvas)
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{
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var slide = SlidePart.Slide;
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var slideContext = new SlideContext(slide, DocumentModel.PresentationDocument);
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foreach (var openXmlElement in slide.CommonSlideData!.ShapeTree!.ChildElements)
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{
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canvas.SaveState();
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var openXmlElementFlatten = new OpenXmlElementFlatten();
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var newElement = openXmlElementFlatten.GetFlattenElement(openXmlElement, slideContext, shouldCloneOriginElement: false);
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//var rootElement ??= slideContext.RootElement;
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//var currentPart = slideContext.GetCurrentPart();
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//var colorMap = slideContext.GetColorMap();
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//var colorScheme = slideContext.GetColorScheme();
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if (newElement is Shape shape)
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{
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RenderShape(canvas, newElement, slideContext, shape);
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}
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else
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{
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// 其他类型的元素
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}
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canvas.RestoreState();
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}
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}
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private void RenderShape(ICanvas canvas, OpenXmlElement newElement, SlideContext slideContext, Shape shape)
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{
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var transformData = newElement.GetOrCreateTransformData(slideContext);
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// 这里渲染采用像素单位，需要进行转换
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// 设置坐标
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canvas.Translate((float)transformData.OffsetX.ToPixel().Value, (float)transformData.OffsetY.ToPixel().Value);
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var shapeProperties = shape.ShapeProperties;
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if (shapeProperties == null)
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{
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return;
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}
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var solidFill = shapeProperties.GetFirstChild<SolidFill>();
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if (solidFill != null)
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{
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var aRgbColor = ColorHelper.BuildColor(solidFill, slideContext);
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if (aRgbColor != null)
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{
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canvas.FillColor = ARgbToColor(aRgbColor);
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}
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}
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// 获取线条
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var outline = shapeProperties.GetFirstChild<Outline>();
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if (outline != null)
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{
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if (outline.Width is not null)
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{
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var emu = new Emu(outline.Width);
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canvas.StrokeSize = (float)emu.ToPixel().Value;
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}
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var lineFill = outline.GetFirstChild<SolidFill>();
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if (lineFill != null)
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{
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var aRgbColor = ColorHelper.BuildColor(lineFill, slideContext);
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if (aRgbColor != null)
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{
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canvas.StrokeColor = ARgbToColor(aRgbColor);
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}
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}
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}
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var svgPath = shape.ToSvgPath();
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var multiShapePaths = svgPath?.MultiShapePaths;
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if (multiShapePaths != null)
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{
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foreach (var multiShapePath in multiShapePaths)
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{
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PathF path = PathConverter.ToPath(multiShapePath.Path);
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if (multiShapePath.IsFilled)
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{
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canvas.FillPath(path, WindingMode.NonZero);
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}
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if (multiShapePath.IsStroke)
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{
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canvas.DrawPath(path);
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}
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}
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}
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}
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private static Color ARgbToColor(ARgbColor aRgbColor)
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{
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var color = new Color(aRgbColor.R, aRgbColor.G, aRgbColor.B, aRgbColor.A);
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return color;
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}
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}

‎demo/DocumentFormat.OpenXml.Flatten.Demo/MAUI/MauiPptxViewerCore/PptxViewer.cs‎

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using DocumentFormat.OpenXml.Flatten.Compatibilities.Packaging;
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using DocumentFormat.OpenXml.Packaging;
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using DocumentFormat.OpenXml.Presentation;
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using Microsoft.Maui.Graphics;
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namespace MauiPptxViewerCore;
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public class PptxViewer
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{
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public PptxViewer(FileInfo pptxFile, ICanvas canvas)
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{
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PptxFile = pptxFile;
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Canvas = canvas;
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}
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public FileInfo PptxFile { get; }
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public ICanvas Canvas { get; }
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private Stream? _stream; // do not care about dispose it... This is a demo
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public void Open()
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{
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_stream = PptxFile.Open(FileMode.Open, FileAccess.ReadWrite);
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// 解析细节请参阅 [Office 使用 OpenXML SDK 解析文档博客目录](https://blog.lindexi.com/post/Office-%E4%BD%BF%E7%94%A8-OpenXML-SDK-%E8%A7%A3%E6%9E%90%E6%96%87%E6%A1%A3%E5%8D%9A%E5%AE%A2%E7%9B%AE%E5%BD%95.html )
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var package = CompatiblePackageProvider.OpenPackage(_stream, FileMode.Open, FileAccess.ReadWrite);
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PresentationDocument presentationDocument = PresentationDocument.Open(package);
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Presentation presentation = presentationDocument.PresentationPart!.Presentation;
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var documentModel = new DocumentModel(presentationDocument, presentation);
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_pptxDocument = new PptxDocument(documentModel);
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var pptxSlide = _pptxDocument.SlideList.FirstOrDefault();
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if (pptxSlide != null)
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{
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pptxSlide.Render(Canvas);
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}
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}
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private PptxDocument? _pptxDocument;
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}
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//public record PptxViewerBuilder(FileInfo PptxFile, ICanvas Canvas)
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//{
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//}

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