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package gofpdi
import (
realgofpdi "github.com/phpdave11/gofpdi"
)
// 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)
}
// 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)
// 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
}
// Draw 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)
}
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