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Merge pull request #355 from adrg/appender-acroforms

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Fix appender AcroForm loading
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Gunnsteinn Hall 2019-02-21 22:01:56 +00:00 committed by GitHub
commit 793e64a99d
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1 changed files with 12 additions and 3 deletions
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15
pdf/model/appender.go
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@ -129,6 +129,12 @@ func NewPdfAppender(reader *PdfReader) (*PdfAppender, error) {
for _, p := range a.roReader.PageList { for _, p := range a.roReader.PageList {
a.pages = append(a.pages, p) a.pages = append(a.pages, p)
} }
// Load interactive forms and fields.
a.roReader.AcroForm, err = a.roReader.loadForms()
if err != nil {
return nil, err
}
a.acroForm = a.roReader.AcroForm a.acroForm = a.roReader.AcroForm
return a, nil return a, nil
@ -412,9 +418,12 @@ func (a *PdfAppender) Sign(pageNum int, field *PdfFieldSignature) error {
page.Annotations = append(page.Annotations, field.PdfAnnotationWidget.PdfAnnotation) page.Annotations = append(page.Annotations, field.PdfAnnotationWidget.PdfAnnotation)
// Add signature field to the form. // Add signature field to the form.
acroForm := a.Reader.AcroForm acroForm := a.acroForm
if acroForm == nil { if acroForm == nil {
acroForm = NewPdfAcroForm() acroForm = a.Reader.AcroForm
if acroForm == nil {
acroForm = NewPdfAcroForm()
}
} }
acroForm.SigFlags = core.MakeInteger(3) acroForm.SigFlags = core.MakeInteger(3)
@ -526,7 +535,7 @@ func (a *PdfAppender) Write(w io.Writer) error {
a.addNewObjects(obj) a.addNewObjects(obj)
kids.Append(obj) kids.Append(obj)
} }
if a.acroForm != nil && a.acroForm != a.roReader.AcroForm { if a.acroForm != nil {
writer.SetForms(a.acroForm) writer.SetForms(a.acroForm)
} }