1 files changed, 131 insertions, 0 deletions
diff --git a/pkg/hocr/lines.go b/pkg/hocr/lines.go
new file mode 100644
index 0000000..e90b0a8
--- /dev/null
+++ b/pkg/hocr/lines.go
@@ -0,0 +1,131 @@
+package hocr
+
+// TODO: Parse line name to zero pad line numbers, so they can
+//       be sorted easily
+
+import (
+	"image"
+	"image/png"
+	"io/ioutil"
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"rescribe.xyz/utils/pkg/line"
+)
+
+func getLineText(l OcrLine) (string) {
+	linetext := ""
+
+	linetext = l.Text
+	if noText(linetext) {
+		linetext = ""
+		for _, w := range l.Words {
+			if w.Class != "ocrx_word" {
+				continue
+			}
+			linetext += w.Text + " "
+		}
+	}
+	if noText(linetext) {
+		linetext = ""
+		for _, w := range l.Words {
+			if w.Class != "ocrx_word" {
+				continue
+			}
+			for _, c := range w.Chars {
+				if c.Class != "ocrx_cinfo" {
+					continue
+				}
+				linetext += c.Text
+			}
+			linetext += " "
+		}
+	}
+	linetext = strings.TrimRight(linetext, " ")
+	linetext += "\n"
+	return linetext
+}
+
+func parseLineDetails(h Hocr, i image.Image, name string) (line.Details, error) {
+	lines := make(line.Details, 0)
+
+	for _, l := range h.Lines {
+		totalconf := float64(0)
+		num := 0
+		for _, w := range l.Words {
+			c, err := wordConf(w.Title)
+			if err != nil {
+				return lines, err
+			}
+			num++
+			totalconf += c
+		}
+
+		coords, err := boxCoords(l.Title)
+		if err != nil {
+			return lines, err
+		}
+
+		var ln line.Detail
+		ln.Name = l.Id
+		ln.Avgconf = (totalconf / float64(num)) / 100
+		ln.Text = getLineText(l)
+		ln.OcrName = name
+		if i != nil {
+			var imgd line.ImgDirect
+			imgd.Img = i.(*image.Gray).SubImage(image.Rect(coords[0], coords[1], coords[2], coords[3]))
+			ln.Img = imgd
+		}
+		lines = append(lines, ln)
+	}
+	return lines, nil
+}
+
+func GetLineDetails(hocrfn string) (line.Details, error) {
+	var newlines line.Details
+
+	file, err := ioutil.ReadFile(hocrfn)
+	if err != nil {
+		return newlines, err
+	}
+
+	h, err := Parse(file)
+	if err != nil {
+		return newlines, err
+	}
+
+	var img image.Image
+	pngfn := strings.Replace(hocrfn, ".hocr", ".png", 1)
+	pngf, err := os.Open(pngfn)
+	if err != nil {
+		log.Println("Warning: can't open image %s\n", pngfn)
+	} else {
+		defer pngf.Close()
+		img, err = png.Decode(pngf)
+		if err != nil {
+			log.Println("Warning: can't load image %s\n", pngfn)
+		}
+	}
+
+	n := strings.Replace(filepath.Base(hocrfn), ".hocr", "", 1)
+	return parseLineDetails(h, img, n)
+}
+
+func GetLineBasics(hocrfn string) (line.Details, error) {
+	var newlines line.Details
+
+	file, err := ioutil.ReadFile(hocrfn)
+	if err != nil {
+		return newlines, err
+	}
+
+	h, err := Parse(file)
+	if err != nil {
+		return newlines, err
+	}
+
+	n := strings.Replace(filepath.Base(hocrfn), ".hocr", "", 1)
+	return parseLineDetails(h, nil, n)
+}