gooxml

README

gooxml is a library for creation of Office Open XML documents (.docx, .xlsx and .pptx). It's goal is to be the most compatible and highest performance Go library for creation and editing of docx/xlsx/pptx files.

Status

• Documents (docx) work well, and there are no known issues.
• Spreadsheets (xlsx) support is new and the API may change.
• PowerPoint (pptx) is unsupported at the moment, the XML types exist and some prototype code is checked in but it will be reworked once docx/xlsx are 'finished'.

Performance

There has been a great deal of interest in performance numbers for spreadsheet creation/reading lately, so here are gooxml numbers for this benchmark which creates a sheet with 30k rows, each with 100 columns.

creating 30000 rows * 100 cells took 3.92506863s
saving took 89ns
reading took 9.522383048s

Creation is fairly fast, saving is very quick due to no reflection usage, and reading is a bit slower. The downside is that the binary is large (33MB) as it contains generated structs, serialization and deserialization code for all of DOCX/XLSX/PPTX.

Current Work

The current work being performed is the implementation of a spreadsheet formula parser and evaluator. Some initial progress has been made, but there is a long way to go.

The intent is to get the vast majority of formulas working. The data in "A Grammar for Spreadsheet Formulas Evaluated on Two Large Datasets - Efthimia Aivaloglou, et al.", suggests that:

(1) most Excel formulas are simple, however formulas with more than 50 functions or operations exist (2) almost all formulas use data from other cells, which is often not local, and (3) a surprising number of referring mechanisms are used by less than 1% of the formulas.

From this, it appears that we can quickly approach a point of diminishing returns by implementing the most common formula features, saving others for when/if users request it.

Installation

go get baliance.com/gooxml/
go build -i baliance.com/gooxml/...

Document Examples

• Simple Text Formatting Text font colors, sizes, highlighting, etc.
• Auto Generated Table of Contents Creating document headings with an auto generated TOC based off of the headingds
• Floating Image Placing an image somewhere on a page, absolutely positioned with different text wrapping.
• Header & Footer Creating headers and footers including page numbering.
• Multiple Headers & Footers Using different headers and footers depending on document section.
• Inline Tables Adding an table with and without borders.
• Using Existing Word Document as a Template Opening a document as a template to re-use the styles created in the document.
• Filling out Form Fields Opening a document with embedded form fields, filling out the fields and saving the result as a new filled form.

Spreadsheet Examples

• Simple A simple sheet with a few cells
• Named Cells Different ways of referencing rows and cells
• Cell Number/Date/Time Formats Creating cells with various number/date/time formats
• Line Chart/Line Chart 3D Line Charts
• Bar Chart Bar Charts
• Mutiple Charts Multiple charts on a single sheet
• Named Cell Ranges Naming cell ranges
• Merged Cells Merge and unmerge cells
• Conditional Formatting Conditionally formatting cells, styling, gradients, icons, data bar
• Complex Multiple charts, auto filtering and conditional formatting
• Borders Individual cell borders and rectangular borders around a range of cells.
• Validation Data validation including combo box dropdowns.
• Frozen Rows/Cols A sheet with a frozen header column and row

Raw Types

The OOXML specification is large and creating a friendly API to cover the entire specification is a very time consuming endeavor. This library attempts to provide an easy to use API for common use cases in creating OOXML documents while allowing users to fall back to raw document manipulation should the library's API not cover a specific use case.

The raw XML based types reside in the schema/ directory. These types are accessible from the wrapper types via a X() method that returns the raw type.

For example, the library currently doesn't have an API for setting a document background color. However it's easy to do manually via editing the CT_Background element of the document.

dox := document.New()
doc.X().Background = wordprocessingml.NewCT_Background()
doc.X().Background.ColorAttr = &wordprocessingml.ST_HexColor{}
doc.X().Background.ColorAttr.ST_HexColorRGB = color.RGB(50, 50, 50).AsRGBString()

Contribution guidelines

All contributors are must sign a contributor license agreement before their code will be reviewed and merged.

Licensing

This library is offered under a dual license. It is freely available for use under the terms of AGPLv3. If you would like to use this library for a closed source project, please contact sales@baliance.com.

There are no differences in functionality between the open source and commercial versions. You are encouraged to use the open source version to evaluate the library before purchasing a commercial license.

Consulting

Baliance also offers consulting services related to enhancing the gooxml library on a case by case basis. Please contact consulting@baliance.com if interested.

Documentation

Overview

Package gooxml provides creation, reading, and writing of ECMA 376 Office Open XML documents, spreadsheets and presentations. It is still early in development, but is progressing quickly. This library takes a slightly different approach from others, in that it starts by trying to support all of the ECMA-376 standard when marshaling/unmarshaling XML documents. From there it adds wrappers around the ECMA-376 derived types that provide a more convenient interface.

The raw XML based types reside in the `schema/“ directory. These types are always accessible from the wrapper types via a `X() method that returns the raw type. Except for the base documents (document.Document, spreadsheet.Workbook and presentation.Presentation), the other wrapper types are value types with non-pointer methods. They exist solely to modify and return data from one or more XML types.

The packages of interest are baliance.com/gooxml/document, baliance/gooxml/spreadsheet and baliance.com/gooxml/presentation.

Example (Document)

package main

import (
	"baliance.com/gooxml/document"
)

func main() {
	// see the baliance.com/gooxml/document documentation or _examples/document
	// for more examples
	doc := document.New()
	doc.AddParagraph().AddRun().AddText("Hello World!")
	doc.SaveToFile("document.docx")
}

Example (Spreadsheeet)

package main

import (
	"baliance.com/gooxml/spreadsheet"
)

func main() {
	// see the baliance.com/gooxml/spreadsheet documentation or _examples/spreadsheet
	// for more examples
	ss := spreadsheet.New()
	sheet := ss.AddSheet()
	sheet.AddRow().AddCell().SetString("Hello")
	sheet.Cell("B1").SetString("World!")
	ss.SaveToFile("workbook.xlsx")
}

Index

• Constants
• func AbsoluteFilename(dt DocType, typ string, index int) string
• func AddPreserveSpaceAttr(se *xml.StartElement, s string)
• func Bool(v bool) *bool
• func Float32(v float32) *float32
• func Float64(v float64) *float64
• func Int32(v int32) *int32
• func Int64(v int64) *int64
• func Int8(v int8) *int8
• func NeedsSpacePreserve(s string) bool
• func RegisterConstructor(ns, name string, fn interface{})
• func RelativeFilename(dt DocType, typ string, index int) string
• func String(v string) *string
• func Stringf(f string, args ...interface{}) *string
• func Uint16(v uint16) *uint16
• func Uint32(v uint32) *uint32
• func Uint64(v uint64) *uint64
• func Uint8(v uint8) *uint8
• type Any
  • func CreateElement(start xml.StartElement) (Any, error)
• type DocType
• type XSDAny
  • func (x *XSDAny) MarshalXML(e *xml.Encoder, start xml.StartElement) error
  • func (x *XSDAny) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error

Examples

• Package (Document)
• Package (Spreadsheeet)

Constants

const (
	ContentTypesFilename = "[Content_Types].xml"
	BaseRelsFilename     = "_rels/.rels"
)

Common filenames used in zip packages.

const (
	// Common
	OfficeDocumentType     = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument"
	StylesType             = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles"
	ThemeType              = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/theme"
	ThemeContentType       = "application/vnd.openxmlformats-officedocument.theme+xml"
	SettingsType           = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/settings"
	ImageType              = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/image"
	CommentsType           = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/comments"
	CommentsContentType    = "application/vnd.openxmlformats-officedocument.spreadsheetml.comments+xml"
	ThumbnailType          = "http://schemas.openxmlformats.org/package/2006/relationships/metadata/thumbnail"
	DrawingType            = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/drawing"
	DrawingContentType     = "application/vnd.openxmlformats-officedocument.drawing+xml"
	ChartType              = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/chart"
	ChartContentType       = "application/vnd.openxmlformats-officedocument.drawingml.chart+xml"
	HyperLinkType          = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/hyperlink"
	ExtendedPropertiesType = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/extended-properties"
	CorePropertiesType     = "http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties"

	// SML
	WorksheetType            = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/worksheet"
	WorksheetContentType     = "application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml"
	SharedStingsType         = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/sharedStrings"
	SharedStringsContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sharedStrings+xml"
	SMLStyleSheetContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.styles+xml"
	TableType                = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/table"
	TableContentType         = "application/vnd.openxmlformats-officedocument.spreadsheetml.table+xml"

	// WML
	HeaderType      = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/header"
	FooterType      = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/footer"
	NumberingType   = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/numbering"
	FontTableType   = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/fontTable"
	WebSettingsType = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/webSettings"
	FootNotesType   = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/footnotes"
	EndNotesType    = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/endnotes"

	// PML
	SlideType                   = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/slide"
	SlideContentType            = "application/vnd.openxmlformats-officedocument.presentationml.slide+xml"
	SlideMasterRelationshipType = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/slideMaster"
	SlideMasterContentType      = "application/vnd.openxmlformats-officedocument.presentationml.slideMaster+xml"
	SlideLayoutType             = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/slideLayout"
	SlideLayoutContentType      = "application/vnd.openxmlformats-officedocument.presentationml.slideLayout+xml"

	// VML
	VMLDrawingType        = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/vmlDrawing"
	VMLDrawingContentType = "application/vnd.openxmlformats-officedocument.vmlDrawing"
)

Consts for content types used throughout the package

Functions

func AbsoluteFilename

func AbsoluteFilename(dt DocType, typ string, index int) string

AbsoluteFilename returns the full path to a file from the root of the zip container. Index is used in some cases for files which there may be more than one of (e.g. worksheets/drawings/charts)

func AddPreserveSpaceAttr

func AddPreserveSpaceAttr(se *xml.StartElement, s string)

AddPreserveSpaceAttr adds an xml:space="preserve" attribute to a start element if it is required for the string s.

func Bool

func Bool(v bool) *bool

Bool returns a copy of v as a pointer.

func Float32

func Float32(v float32) *float32

Float32 returns a copy of v as a pointer.

func Float64

func Float64(v float64) *float64

Float64 returns a copy of v as a pointer.

func Int32

func Int32(v int32) *int32

Int32 returns a copy of v as a pointer.

func Int64

func Int64(v int64) *int64

Int64 returns a copy of v as a pointer.

func Int8

func Int8(v int8) *int8

Int8 returns a copy of v as a pointer.

func NeedsSpacePreserve

func NeedsSpacePreserve(s string) bool

NeedsSpacePreserve returns true if the string has leading or trailing space.

func RegisterConstructor

func RegisterConstructor(ns, name string, fn interface{})

RegisterConstructor registers a constructor function used for unmarshaling xsd:any elements.

func RelativeFilename

func RelativeFilename(dt DocType, typ string, index int) string

RelativeFilename returns a filename relative to where it is normally referenced from a relationships file. Index is used in some cases for files which there may be more than one of (e.g. worksheets/drawings/charts)

func String

func String(v string) *string

String returns a copy of v as a pointer.

func Stringf

func Stringf(f string, args ...interface{}) *string

String returns a copy of v as a pointer.

func Uint16

func Uint16(v uint16) *uint16

Uint16 returns a copy of v as a pointer.

func Uint32

func Uint32(v uint32) *uint32

Uint32 returns a copy of v as a pointer.

func Uint64

func Uint64(v uint64) *uint64

Uint64 returns a copy of v as a pointer.

func Uint8

func Uint8(v uint8) *uint8

Uint8 returns a copy of v as a pointer.

Types

type Any

type Any interface {
	MarshalXML(e *xml.Encoder, start xml.StartElement) error
	UnmarshalXML(d *xml.Decoder, start xml.StartElement) error
}

Any is the interface used for marshaling/unmarshaling xsd:any

func CreateElement

func CreateElement(start xml.StartElement) (Any, error)

CreateElement creates an element with the given namespace and name. It is used to unmarshal some xsd:any elements to the appropriate concrete type.

type DocType

type DocType byte

DocType represents one of the three document types supported (docx/xlsx/pptx)

const (
	Unknown DocType = iota
	DocTypeSpreadsheet
	DocTypeDocument
	DocTypePresentation
)

Document Type constants

type XSDAny

type XSDAny struct {
	XMLName xml.Name
	Attrs   []xml.Attr
	Data    []byte
	Nodes   []*XSDAny
}

XSDAny is used to marshal/unmarshal xsd:any types in the OOXML schema.

func (*XSDAny) MarshalXML

func (x *XSDAny) MarshalXML(e *xml.Encoder, start xml.StartElement) error

MarshalXML implements the xml.Marshaler interface.

func (*XSDAny) UnmarshalXML

func (x *XSDAny) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error

UnmarshalXML implements the xml.Unmarshaler interface.