d2/lib/ppt/pptx.go

package ppt

import (
	"archive/zip"
	"bytes"
	_ "embed"
	"fmt"
	"io"
	"strings"
)

// Office Open XML (OOXML) http://officeopenxml.com/prPresentation.php

//go:embed template.pptx
var pptx_template []byte

func copyPptxTemplateTo(w *zip.Writer) error {
	reader := bytes.NewReader(pptx_template)
	zipReader, err := zip.NewReader(reader, reader.Size())
	if err != nil {
		fmt.Printf("%v", err)
	}

	for _, f := range zipReader.File {
		fw, err := w.Create(f.Name)
		if err != nil {
			return err
		}
		fr, err := f.Open()
		if err != nil {
			return err
		}
		_, err = io.Copy(fw, fr)
		if err != nil {
			return err
		}
	}
	return nil
}

func addFile(zipFile *zip.Writer, filePath, content string) error {
	w, err := zipFile.Create(filePath)
	if err != nil {
		return err
	}
	w.Write([]byte(content))
	return nil
}

// https://startbigthinksmall.wordpress.com/2010/01/04/points-inches-and-emus-measuring-units-in-office-open-xml/
const SLIDE_WIDTH = 9144000
const SLIDE_HEIGHT = 5143500
const HEADER_HEIGHT = 392471

const IMAGE_WIDTH = SLIDE_WIDTH
const IMAGE_HEIGHT = SLIDE_HEIGHT - HEADER_HEIGHT

const RELS_SLIDE_XML = `<?xml version='1.0' encoding='UTF-8' standalone='yes'?><Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships"><Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/slideLayout" Target="../slideLayouts/slideLayout7.xml" /><Relationship Id="%s" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/image" Target="../media/%s.png" /></Relationships>`

func getRelsSlideXml(imageId string) string {
	return fmt.Sprintf(RELS_SLIDE_XML, imageId, imageId)
}

const SLIDE_XML = `<?xml version='1.0' encoding='UTF-8' standalone='yes'?><p:sld xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main" xmlns:p="http://schemas.openxmlformats.org/presentationml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships"><p:cSld><p:spTree><p:nvGrpSpPr><p:cNvPr id="1" name="" /><p:cNvGrpSpPr /><p:nvPr /></p:nvGrpSpPr><p:grpSpPr /><p:pic><p:nvPicPr><p:cNvPr id="2" name="%s" descr="%s" /><p:cNvPicPr><a:picLocks noChangeAspect="1" /></p:cNvPicPr><p:nvPr /></p:nvPicPr><p:blipFill><a:blip r:embed="%s" /><a:stretch><a:fillRect /></a:stretch></p:blipFill><p:spPr><a:xfrm><a:off x="%d" y="%d" /><a:ext cx="%d" cy="%d" /></a:xfrm><a:prstGeom prst="rect"><a:avLst /></a:prstGeom></p:spPr></p:pic><p:sp><p:nvSpPr><p:cNvPr id="95" name="%s" /><p:cNvSpPr txBox="1" /><p:nvPr /></p:nvSpPr><p:spPr><a:xfrm><a:off x="4001" y="6239" /><a:ext cx="9135998" cy="%d" /></a:xfrm><a:prstGeom prst="rect"><a:avLst /></a:prstGeom><a:ln w="12700"><a:miter lim="400000" /></a:ln><a:extLst><a:ext uri="{C572A759-6A51-4108-AA02-DFA0A04FC94B}"><ma14:wrappingTextBoxFlag val="1" xmlns:ma14="http://schemas.microsoft.com/office/mac/drawingml/2011/main" /></a:ext></a:extLst></p:spPr><p:txBody><a:bodyPr lIns="45719" rIns="45719"><a:spAutoFit /></a:bodyPr><a:lstStyle><a:lvl1pPr><a:defRPr sz="2400" /></a:lvl1pPr></a:lstStyle><a:p><a:pPr />%s</a:p></p:txBody></p:sp></p:spTree></p:cSld><p:clrMapOvr><a:masterClrMapping /></p:clrMapOvr></p:sld>`

func getSlideXml(boardPath []string, imageId string, top, left, width, height int) string {
	var slideTitle string
	boardName := boardPath[len(boardPath)-1]
	prefixPath := boardPath[:len(boardPath)-1]
	if len(prefixPath) > 0 {
		prefix := strings.Join(prefixPath, "  /  ") + "  /  "
		slideTitle = fmt.Sprintf(`<a:r><a:t>%s</a:t></a:r><a:r><a:rPr b="1" /><a:t>%s</a:t></a:r>`, prefix, boardName)
	} else {
		slideTitle = fmt.Sprintf(`<a:r><a:rPr b="1" /><a:t>%s</a:t></a:r>`, boardName)
	}
	slideDescription := strings.Join(boardPath, " / ")
	top += HEADER_HEIGHT
	return fmt.Sprintf(SLIDE_XML, slideDescription, slideDescription, imageId, left, top, width, height, slideDescription, HEADER_HEIGHT, slideTitle)
}

func getPresentationXmlRels(slideFileNames []string) string {
	var builder strings.Builder
	builder.WriteString(`<?xml version='1.0' encoding='UTF-8' standalone='yes'?><Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships"><Relationship Id="rId3" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/presProps" Target="presProps.xml" /><Relationship Id="rId4" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/viewProps" Target="viewProps.xml" /><Relationship Id="rId5" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/theme" Target="theme/theme1.xml" /><Relationship Id="rId6" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/tableStyles" Target="tableStyles.xml" /><Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/slideMaster" Target="slideMasters/slideMaster1.xml" /><Relationship Id="rId2" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/printerSettings" Target="printerSettings/printerSettings1.bin" />`)

	for _, name := range slideFileNames {
		builder.WriteString(fmt.Sprintf(
			`<Relationship Id="%s" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/slide" Target="slides/%s.xml" />`, name, name,
		))
	}

	builder.WriteString("</Relationships>")

	return builder.String()
}

func getContentTypesXml(slideFileNames []string) string {
	var builder strings.Builder
	builder.WriteString(`<?xml version='1.0' encoding='UTF-8' standalone='yes'?><Types xmlns="http://schemas.openxmlformats.org/package/2006/content-types"><Default Extension="bin" ContentType="application/vnd.openxmlformats-officedocument.presentationml.printerSettings" /><Default Extension="jpeg" ContentType="image/jpeg" /><Default Extension="png" ContentType="image/png" /><Default Extension="rels" ContentType="application/vnd.openxmlformats-package.relationships+xml" /><Default Extension="xml" ContentType="application/xml" /><Override PartName="/docProps/app.xml" ContentType="application/vnd.openxmlformats-officedocument.extended-properties+xml" /><Override PartName="/docProps/core.xml" ContentType="application/vnd.openxmlformats-package.core-properties+xml" /><Override PartName="/ppt/presProps.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.presProps+xml" /><Override PartName="/ppt/presentation.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.presentation.main+xml" /><Override PartName="/ppt/slideLayouts/slideLayout1.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml" /><Override PartName="/ppt/slideLayouts/slideLayout10.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml" /><Override PartName="/ppt/slideLayouts/slideLayout11.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml" /><Override PartName="/ppt/slideLayouts/slideLayout2.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml" /><Override PartName="/ppt/slideLayouts/slideLayout3.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml" /><Override PartName="/ppt/slideLayouts/slideLayout4.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml" /><Override PartName="/ppt/slideLayouts/slideLayout5.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml" /><Override PartName="/ppt/slideLayouts/slideLayout6.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml" /><Override PartName="/ppt/slideLayouts/slideLayout7.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml" /><Override PartName="/ppt/slideLayouts/slideLayout8.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml" /><Override PartName="/ppt/slideLayouts/slideLayout9.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml" /><Override PartName="/ppt/slideMasters/slideMaster1.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slideMaster+xml" />`)

	for _, name := range slideFileNames {
		builder.WriteString(fmt.Sprintf(
			`<Override PartName="/ppt/slides/%s.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slide+xml" />`, name,
		))
	}

	builder.WriteString(`<Override PartName="/ppt/tableStyles.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.tableStyles+xml" /><Override PartName="/ppt/theme/theme1.xml" ContentType="application/vnd.openxmlformats-officedocument.theme+xml" /><Override PartName="/ppt/viewProps.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.viewProps+xml" /></Types>`)
	return builder.String()
}

func getPresentationXml(slideFileNames []string) string {
	var builder strings.Builder
	builder.WriteString(`<?xml version='1.0' encoding='UTF-8' standalone='yes'?><p:presentation xmlns:a="http://schemas.openxmlformats.org/drawingml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:p="http://schemas.openxmlformats.org/presentationml/2006/main" saveSubsetFonts="1" autoCompressPictures="0"><p:sldMasterIdLst><p:sldMasterId id="2147483648" r:id="rId1" /></p:sldMasterIdLst>`)

	builder.WriteString("<p:sldIdLst>")
	for i, name := range slideFileNames {
		builder.WriteString(fmt.Sprintf(`<p:sldId id="%d" r:id="%s" />`, i, name))
	}
	builder.WriteString("</p:sldIdLst>")

	builder.WriteString(fmt.Sprintf(
		`<p:sldSz cx="%d" cy="%d" type="screen4x3" /><p:notesSz cx="6858000" cy="9144000" /><p:defaultTextStyle><a:defPPr><a:defRPr lang="en-US" /></a:defPPr><a:lvl1pPr marL="0" algn="l" defTabSz="457200" rtl="0" eaLnBrk="1" latinLnBrk="0" hangingPunct="1"><a:defRPr sz="1800" kern="1200"><a:solidFill><a:schemeClr val="tx1" /></a:solidFill><a:latin typeface="+mn-lt" /><a:ea typeface="+mn-ea" /><a:cs typeface="+mn-cs" /></a:defRPr></a:lvl1pPr><a:lvl2pPr marL="457200" algn="l" defTabSz="457200" rtl="0" eaLnBrk="1" latinLnBrk="0" hangingPunct="1"><a:defRPr sz="1800" kern="1200"><a:solidFill><a:schemeClr val="tx1" /></a:solidFill><a:latin typeface="+mn-lt" /><a:ea typeface="+mn-ea" /><a:cs typeface="+mn-cs" /></a:defRPr></a:lvl2pPr><a:lvl3pPr marL="914400" algn="l" defTabSz="457200" rtl="0" eaLnBrk="1" latinLnBrk="0" hangingPunct="1"><a:defRPr sz="1800" kern="1200"><a:solidFill><a:schemeClr val="tx1" /></a:solidFill><a:latin typeface="+mn-lt" /><a:ea typeface="+mn-ea" /><a:cs typeface="+mn-cs" /></a:defRPr></a:lvl3pPr><a:lvl4pPr marL="1371600" algn="l" defTabSz="457200" rtl="0" eaLnBrk="1" latinLnBrk="0" hangingPunct="1"><a:defRPr sz="1800" kern="1200"><a:solidFill><a:schemeClr val="tx1" /></a:solidFill><a:latin typeface="+mn-lt" /><a:ea typeface="+mn-ea" /><a:cs typeface="+mn-cs" /></a:defRPr></a:lvl4pPr><a:lvl5pPr marL="1828800" algn="l" defTabSz="457200" rtl="0" eaLnBrk="1" latinLnBrk="0" hangingPunct="1"><a:defRPr sz="1800" kern="1200"><a:solidFill><a:schemeClr val="tx1" /></a:solidFill><a:latin typeface="+mn-lt" /><a:ea typeface="+mn-ea" /><a:cs typeface="+mn-cs" /></a:defRPr></a:lvl5pPr><a:lvl6pPr marL="2286000" algn="l" defTabSz="457200" rtl="0" eaLnBrk="1" latinLnBrk="0" hangingPunct="1"><a:defRPr sz="1800" kern="1200"><a:solidFill><a:schemeClr val="tx1" /></a:solidFill><a:latin typeface="+mn-lt" /><a:ea typeface="+mn-ea" /><a:cs typeface="+mn-cs" /></a:defRPr></a:lvl6pPr><a:lvl7pPr marL="2743200" algn="l" defTabSz="457200" rtl="0" eaLnBrk="1" latinLnBrk="0" hangingPunct="1"><a:defRPr sz="1800" kern="1200"><a:solidFill><a:schemeClr val="tx1" /></a:solidFill><a:latin typeface="+mn-lt" /><a:ea typeface="+mn-ea" /><a:cs typeface="+mn-cs" /></a:defRPr></a:lvl7pPr><a:lvl8pPr marL="3200400" algn="l" defTabSz="457200" rtl="0" eaLnBrk="1" latinLnBrk="0" hangingPunct="1"><a:defRPr sz="1800" kern="1200"><a:solidFill><a:schemeClr val="tx1" /></a:solidFill><a:latin typeface="+mn-lt" /><a:ea typeface="+mn-ea" /><a:cs typeface="+mn-cs" /></a:defRPr></a:lvl8pPr><a:lvl9pPr marL="3657600" algn="l" defTabSz="457200" rtl="0" eaLnBrk="1" latinLnBrk="0" hangingPunct="1"><a:defRPr sz="1800" kern="1200"><a:solidFill><a:schemeClr val="tx1" /></a:solidFill><a:latin typeface="+mn-lt" /><a:ea typeface="+mn-ea" /><a:cs typeface="+mn-cs" /></a:defRPr></a:lvl9pPr></p:defaultTextStyle></p:presentation>`,
		SLIDE_WIDTH,
		SLIDE_HEIGHT,
	))
	return builder.String()
}