unioffice/_examples/document/toc/main.go

// Copyright 2017 Baliance. All rights reserved.
package main

import "baliance.com/gooxml/document"
import wml "baliance.com/gooxml/schema/schemas.openxmlformats.org/wordprocessingml"

var lorem = `Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin lobortis, lectus dictum feugiat tempus, sem neque finibus enim, sed eleifend sem nunc ac diam. Vestibulum tempus sagittis elementum`

func main() {
	doc := document.New()

	// Force the TOC to update upon opening the document
	doc.Settings.SetUpdateFieldsOnOpen(true)

	// Add a TOC
	doc.AddParagraph().AddRun().AddField(document.FieldTOC)
	// followed by a page break
	doc.AddParagraph().Properties().AddSection(wml.ST_SectionMarkNextPage)

	// and finally paragraphs at different heading levels
	for i := 0; i < 4; i++ {
		para := doc.AddParagraph()
		para.Properties().SetHeadingLevel(1)
		para.AddRun().AddText("First Level")

		doc.AddParagraph().AddRun().AddText(lorem)
		for i := 0; i < 3; i++ {
			para := doc.AddParagraph()
			para.Properties().SetHeadingLevel(2)
			para.AddRun().AddText("Second Level")
			doc.AddParagraph().AddRun().AddText(lorem)

			para = doc.AddParagraph()
			para.Properties().SetHeadingLevel(3)
			para.AddRun().AddText("Third Level")
			doc.AddParagraph().AddRun().AddText(lorem)
		}
	}
	doc.SaveToFile("toc.docx")
}