Add ability to get page sizes

importer.go

@@ -79,6 +79,16 @@ func (this *Importer) SetSourceFile(f string) {
 	}
 }
 
+func (this *Importer) GetPageSizes() map[int]map[string]map[string]float64 {
+	result, err := this.GetReader().getAllPageBoxes(1.0)
+
+	if err != nil {
+		panic(err)
+	}
+
+	return result
+}
+
 func (this *Importer) ImportPage(pageno int, box string) int {
 	res, err := this.GetWriter().ImportPage(this.GetReader(), pageno, box)
 	if err != nil {

reader.go

@@ -983,6 +983,22 @@ func (this *PdfReader) rebuildContentStream(content *PdfValue) ([]byte, error) {
 	return stream, nil
 }
 
+func (this *PdfReader) getAllPageBoxes(k float64) (map[int]map[string]map[string]float64, error) {
+	var err error
+
+	// Allocate result with the number of available boxes
+	result := make(map[int]map[string]map[string]float64, len(this.pages))
+
+	for i := 1; i <= len(this.pages); i++ {
+		result[i], err = this.getPageBoxes(i, k)
+		if result[i] == nil {
+			return nil, errors.Wrap(err, "Unable to get page box")
+		}
+	}
+
+	return result, nil
+}
+
 // Get all page box data
 func (this *PdfReader) getPageBoxes(pageno int, k float64) (map[string]map[string]float64, error) {
 	var err error