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package gofpdi
import (
realgofpdi "github.com/phpdave11/gofpdi"
"io"
)
// Create new gofpdi instance
var fpdi = realgofpdi.NewImporter()
// gofpdiPdf is a partial interface that only implements the functions we need
// from the PDF generator to put the imported PDF templates on the PDF.
type gofpdiPdf interface {
ImportObjects(objs map[string][]byte)
ImportObjPos(objs map[string]map[int]string)
ImportTemplates(tpls map[string]string)
UseImportedTemplate(tplName string, x float64, y float64, w float64, h float64)
SetError(err error)
}
// ImportPage imports a page of a PDF file with the specified box (/MediaBox,
// /TrimBox, /ArtBox, /CropBox, or /BleedBox). Returns a template id that can
// be used with UseImportedTemplate to draw the template onto the page.
func ImportPage(f gofpdiPdf, sourceFile string, pageno int, box string) int {
// Set source file for fpdi
fpdi.SetSourceFile(sourceFile)
// return template id
return getTemplateID(f, pageno, box)
}
// ImportPageFromStream imports a page of a PDF with the specified box
// (/MediaBox, TrimBox, /ArtBox, /CropBox, or /BleedBox). Returns a template id
// that can be used with UseImportedTemplate to draw the template onto the
// page.
func ImportPageFromStream(f gofpdiPdf, rs *io.ReadSeeker, pageno int, box string) int {
// Set source stream for fpdi
fpdi.SetSourceStream(rs)
// return template id
return getTemplateID(f, pageno, box)
}
func getTemplateID(f gofpdiPdf, pageno int, box string) int {
// Import page
tpl := fpdi.ImportPage(pageno, box)
// Import objects into current pdf document
// Unordered means that the objects will be returned with a sha1 hash instead of an integer
// The objects themselves may have references to other hashes which will be replaced in ImportObjects()
tplObjIDs := fpdi.PutFormXobjectsUnordered()
// Set template names and ids (hashes) in gofpdf
f.ImportTemplates(tplObjIDs)
// Get a map[string]string of the imported objects.
// The map keys will be the ID of each object.
imported := fpdi.GetImportedObjectsUnordered()
// Import gofpdi objects into gofpdf
f.ImportObjects(imported)
// Get a map[string]map[int]string of the object hashes and their positions within each object,
// to be replaced with object ids (integers).
importedObjPos := fpdi.GetImportedObjHashPos()
// Import gofpdi object hashes and their positions into gopdf
f.ImportObjPos(importedObjPos)
return tpl
}
// UseImportedTemplate draws the template onto the page at x,y. If w is 0, the
// template will be scaled to fit based on h. If h is 0, the template will be
// scaled to fit based on w.
func UseImportedTemplate(f gofpdiPdf, tplid int, x float64, y float64, w float64, h float64) {
// Get values from fpdi
tplName, scaleX, scaleY, tX, tY := fpdi.UseTemplate(tplid, x, y, w, h)
f.UseImportedTemplate(tplName, scaleX, scaleY, tX, tY)
}
// GetPageSizes returns page dimensions for all pages of the imported pdf.
// Result consists of map[<page number>]map[<box>]map[<dimension>]<value>.
// <page number>: page number, note that page numbers start at 1
// <box>: box identifier, e.g. "/MediaBox"
// <dimension>: dimension string, either "w" or "h"
func GetPageSizes() map[int]map[string]map[string]float64 {
return fpdi.GetPageSizes()
}
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