More languages
Some test text!
More languages
Sample Go code to use PDFTron SDK for programmatically reading and editing existing outline items, and for creating new PDF bookmarks using the high-level API. Learn more about our Go PDF Library and PDF Editing & Manipulation Library.
Get Started Samples DownloadTo run this sample, get started with a free trial of PDFTron SDK.
//---------------------------------------------------------------------------------------
// Copyright (c) 2001-2021 by PDFTron Systems Inc. All Rights Reserved.
// Consult LICENSE.txt regarding license information.
//---------------------------------------------------------------------------------------
package main
import (
"fmt"
"strconv"
"os"
. "pdftron"
)
import "pdftron/Samples/LicenseKey/GO"
//-----------------------------------------------------------------------------------------
// The sample code illustrates how to read and edit existing outline items and create
// new bookmarks using the high-level API.
//-----------------------------------------------------------------------------------------
// Relattive path to the folder containing the test files.
var inputPath = "../../TestFiles/"
var outputPath = "../../TestFiles/Output/"
func PrintIndent(item Bookmark){
indent := item.GetIndent() - 1
i := 0
for i < indent{
os.Stdout.Write([]byte(" "))
i = i + 1
}
}
// Prints out the outline tree to the standard output
func PrintOutlineTree (item Bookmark){
for item.IsValid(){
PrintIndent(item)
if item.IsOpen(){
os.Stdout.Write([]byte("- " + item.GetTitle() + " ACTION -> "))
}else{
os.Stdout.Write([]byte("+ " + item.GetTitle() + " ACTION -> "))
}
// Print Action
action := item.GetAction()
if action.IsValid(){
if action.GetType() == ActionE_GoTo{
dest := action.GetDest()
if dest.IsValid(){
page := dest.GetPage()
fmt.Println("GoTo Page //" + strconv.Itoa(page.GetIndex()))
}
}else{
fmt.Println("Not a 'GoTo' action")
}
}else{
fmt.Println("NULL")
}
// Recursively print children sub-trees
if item.HasChildren(){
PrintOutlineTree(item.GetFirstChild())
}
item = item.GetNext()
}
}
func main(){
PDFNetInitialize(PDFTronLicense.Key)
// The following example illustrates how to create and edit the outline tree
// using high-level Bookmark methods.
doc := NewPDFDoc(inputPath + "numbered.pdf")
doc.InitSecurityHandler()
// Lets first create the root bookmark items.
red := BookmarkCreate(doc, "Red")
green := BookmarkCreate(doc, "Green")
blue := BookmarkCreate(doc, "Blue")
doc.AddRootBookmark(red)
doc.AddRootBookmark(green)
doc.AddRootBookmark(blue)
// You can also add new root bookmarks using Bookmark.AddNext("...")
blue.AddNext("foo")
blue.AddNext("bar")
// We can now associate new bookmarks with page destinations:
// The following example creates an 'explicit' destination (see
// section '8.2.1 Destinations' in PDF Reference for more details)
itr := doc.GetPageIterator()
redDest := DestinationCreateFit(itr.Current())
red.SetAction(ActionCreateGoto(redDest))
// Create an explicit destination to the first green page in the document
green.SetAction(ActionCreateGoto(DestinationCreateFit(doc.GetPage(10))))
// The following example creates a 'named' destination (see
// section '8.2.1 Destinations' in PDF Reference for more details)
// Named destinations have certain advantages over explicit destinations.
key := []byte("blue1")
blueAction := ActionCreateGoto(&key[0], 2, DestinationCreateFit(doc.GetPage(19)))
blue.SetAction(blueAction)
// We can now add children Bookmarks
subRed1 := red.AddChild("Red - Page 1")
subRed1.SetAction(ActionCreateGoto(DestinationCreateFit(doc.GetPage(1))))
subRed2 := red.AddChild("Red - Page 2")
subRed2.SetAction(ActionCreateGoto(DestinationCreateFit(doc.GetPage(2))))
subRed3 := red.AddChild("Red - Page 3")
subRed3.SetAction(ActionCreateGoto(DestinationCreateFit(doc.GetPage(3))))
subRed4 := subRed3.AddChild("Red - Page 4")
subRed4.SetAction(ActionCreateGoto(DestinationCreateFit(doc.GetPage(4))))
subRed5 := subRed3.AddChild("Red - Page 5")
subRed5.SetAction(ActionCreateGoto(DestinationCreateFit(doc.GetPage(5))))
subRed6 := subRed3.AddChild("Red - Page 6")
subRed6.SetAction(ActionCreateGoto(DestinationCreateFit(doc.GetPage(6))))
// Example of how to find and delete a bookmark by title text.
foo := doc.GetFirstBookmark().Find("foo")
if foo.IsValid(){
foo.Delete()
}else{
panic("Foo is not Valid")
}
bar := doc.GetFirstBookmark().Find("bar")
if bar.IsValid(){
bar.Delete()
}else{
panic("Bar is not Valid")
}
// Adding color to Bookmarks. Color and other formatting can help readers
// get around more easily in large PDF documents.
red.SetColor(1.0, 0.0, 0.0);
green.SetColor(0.0, 1.0, 0.0);
green.SetFlags(2); // set bold font
blue.SetColor(0.0, 0.0, 1.0);
blue.SetFlags(3); // set bold and itallic
doc.Save(outputPath + "bookmark.pdf", uint(0))
doc.Close()
fmt.Println("Done. Result saved in bookmark.pdf")
// The following example illustrates how to traverse the outline tree using
// Bookmark navigation methods: Bookmark.GetNext(), Bookmark.GetPrev(),
// Bookmark.GetFirstChild () and Bookmark.GetLastChild ().
// Open the document that was saved in the previous code sample
doc = NewPDFDoc(outputPath + "bookmark.pdf")
doc.InitSecurityHandler()
root := doc.GetFirstBookmark()
PrintOutlineTree(root)
doc.Close()
fmt.Println("Done.")
// The following example illustrates how to create a Bookmark to a page
// in a remote document. A remote go-to action is similar to an ordinary
// go-to action, but jumps to a destination in another PDF file instead
// of the current file. See Section 8.5.3 'Remote Go-To Actions' in PDF
// Reference Manual for details.
doc = NewPDFDoc(outputPath + "bookmark.pdf")
doc.InitSecurityHandler()
// Create file specification (the file reffered to by the remote bookmark)
fileSpec := doc.CreateIndirectDict()
fileSpec.PutName("Type", "Filespec")
fileSpec.PutString("F", "bookmark.pdf")
spec := NewFileSpec(fileSpec)
gotoRemote := ActionCreateGotoRemote(spec, 5, true)
remoteBookmark1 := BookmarkCreate(doc, "REMOTE BOOKMARK 1")
remoteBookmark1.SetAction(gotoRemote)
doc.AddRootBookmark(remoteBookmark1)
// Create another remote bookmark, but this time using the low-level SDF/Cos API.
// Create a remote action
remoteBookmark2 := BookmarkCreate(doc, "REMOTE BOOKMARK 2")
doc.AddRootBookmark(remoteBookmark2)
gotoR := remoteBookmark2.GetSDFObj().PutDict("A")
gotoR.PutName("S","GoToR") // Set action type
gotoR.PutBool("NewWindow", true)
// Set the file specification
gotoR.Put("F", fileSpec)
// jump to the first page. Note that pages are indexed from 0.
dest := gotoR.PutArray("D") // Set the destination
dest.PushBackNumber(9);
dest.PushBackName("Fit");
doc.Save(outputPath + "bookmark_remote.pdf", uint(SDFDocE_linearized))
doc.Close()
PDFNetTerminate()
fmt.Println("Done. Result saved in bookmark_remote.pdf")
}
PDFTron SDK
COMPANY