// Stage 4: Add Three Annotations
func stage4() {
log.Println("stage 4")
minimal, err := pdf.Open("h7-minimal.pdf")
if err != nil {
log.Fatalln(errgo.Details(err))
}
annotationsObj := minimal.Get(pdf.ObjectReference{ObjectNumber: 7})
annotations := annotationsObj.(pdf.Array)
// annotation 8 1
ref, err := minimal.Add(pdf.IndirectObject{
ObjectReference: pdf.ObjectReference{ObjectNumber: 8, GenerationNumber: 1},
Object: pdf.Dictionary{
pdf.Name("Type"): pdf.Name("Annot"),
pdf.Name("Subtype"): pdf.Name("Text"),
pdf.Name("Rect"): pdf.Array{
pdf.Integer(58),
pdf.Integer(657),
pdf.Integer(172),
pdf.Integer(742),
},
pdf.Name("Contents"): pdf.String("New Text #1"),
pdf.Name("Open"): pdf.Boolean(true),
},
})
if err != nil {
log.Fatal(errgo.Details(err))
}
annotations = append(annotations, ref)
// annotation 9 1
ref, err = minimal.Add(pdf.IndirectObject{
ObjectReference: pdf.ObjectReference{ObjectNumber: 9, GenerationNumber: 1},
Object: pdf.Dictionary{
pdf.Name("Type"): pdf.Name("Annot"),
pdf.Name("Subtype"): pdf.Name("Text"),
pdf.Name("Rect"): pdf.Array{
pdf.Integer(389),
pdf.Integer(459),
pdf.Integer(570),
pdf.Integer(537),
},
pdf.Name("Contents"): pdf.String("New Text #2"),
pdf.Name("Open"): pdf.Boolean(false),
},
})
if err != nil {
log.Fatal(errgo.Details(err))
}
annotations = append(annotations, ref)
// annotation 12 0
ref, err = minimal.Add(pdf.IndirectObject{
ObjectReference: pdf.ObjectReference{ObjectNumber: 12},
Object: pdf.Dictionary{
pdf.Name("Type"): pdf.Name("Annot"),
pdf.Name("Subtype"): pdf.Name("Text"),
pdf.Name("Rect"): pdf.Array{
pdf.Integer(44),
pdf.Integer(253),
pdf.Integer(473),
pdf.Integer(337),
},
pdf.Name("Contents"): pdf.String("New Text #3\\203a longer text annotation which we will continue \\\nonto a second line"),
pdf.Name("Open"): pdf.Boolean(true),
},
})
if err != nil {
log.Fatal(errgo.Details(err))
}
annotations = append(annotations, ref)
// update the annotations array
minimal.Add(pdf.IndirectObject{
ObjectReference: pdf.ObjectReference{ObjectNumber: 7},
Object: annotations,
})
err = minimal.Save()
if err != nil {
log.Fatalln(errgo.Details(err))
}
}
// Stage 1: Add Four Text Annotations
func stage1() {
log.Println("stage 1")
minimal, err := pdf.Open("h7-minimal.pdf")
if err != nil {
log.Fatalln(errgo.Details(err))
}
// page
page := minimal.Get(pdf.ObjectReference{ObjectNumber: 4}).(pdf.Dictionary)
page[pdf.Name("Annots")] = pdf.ObjectReference{ObjectNumber: 7}
minimal.Add(pdf.IndirectObject{
ObjectReference: pdf.ObjectReference{ObjectNumber: 4},
Object: page,
})
// annotation array
minimal.Add(pdf.IndirectObject{
ObjectReference: pdf.ObjectReference{ObjectNumber: 7},
Object: pdf.Array{
pdf.ObjectReference{ObjectNumber: 8},
pdf.ObjectReference{ObjectNumber: 9},
pdf.ObjectReference{ObjectNumber: 10},
pdf.ObjectReference{ObjectNumber: 11},
},
})
// annotation
minimal.Add(pdf.IndirectObject{
ObjectReference: pdf.ObjectReference{ObjectNumber: 8},
Object: pdf.Dictionary{
pdf.Name("Type"): pdf.Name("Annot"),
pdf.Name("Subtype"): pdf.Name("Text"),
pdf.Name("Rect"): pdf.Array{
pdf.Integer(44),
pdf.Integer(616),
pdf.Integer(162),
pdf.Integer(735),
},
pdf.Name("Contents"): pdf.String("Text #1"),
pdf.Name("Open"): pdf.Boolean(true),
},
})
// annotation
minimal.Add(pdf.IndirectObject{
ObjectReference: pdf.ObjectReference{ObjectNumber: 9},
Object: pdf.Dictionary{
pdf.Name("Type"): pdf.Name("Annot"),
pdf.Name("Subtype"): pdf.Name("Text"),
pdf.Name("Rect"): pdf.Array{
pdf.Integer(224),
pdf.Integer(668),
pdf.Integer(457),
pdf.Integer(735),
},
pdf.Name("Contents"): pdf.String("Text #2"),
pdf.Name("Open"): pdf.Boolean(false),
},
})
// annotation
minimal.Add(pdf.IndirectObject{
ObjectReference: pdf.ObjectReference{ObjectNumber: 10},
Object: pdf.Dictionary{
pdf.Name("Type"): pdf.Name("Annot"),
pdf.Name("Subtype"): pdf.Name("Text"),
pdf.Name("Rect"): pdf.Array{
pdf.Integer(239),
pdf.Integer(393),
pdf.Integer(328),
pdf.Integer(622),
},
pdf.Name("Contents"): pdf.String("Text #3"),
pdf.Name("Open"): pdf.Boolean(true),
},
})
// annotation
minimal.Add(pdf.IndirectObject{
ObjectReference: pdf.ObjectReference{ObjectNumber: 11},
Object: pdf.Dictionary{
pdf.Name("Type"): pdf.Name("Annot"),
pdf.Name("Subtype"): pdf.Name("Text"),
pdf.Name("Rect"): pdf.Array{
pdf.Integer(34),
pdf.Integer(398),
pdf.Integer(225),
pdf.Integer(575),
},
pdf.Name("Contents"): pdf.String("Text #4"),
pdf.Name("Open"): pdf.Boolean(false),
},
})
err = minimal.Save()
if err != nil {
log.Fatalln(errgo.Details(err))
}
}
