From bb833561aa74f02970aee13cdc75973b29716491 Mon Sep 17 00:00:00 2001
From: leshe4ka46 <alex9102naid1@ya.ru>
Date: Mon, 27 Oct 2025 20:36:28 +0300
Subject: # This is a combination of 2 commits. # This is the 1st commit
 message:

unmarshal all formats, merge them in the single table, users are truly unique

# This is the commit message #2:

i
---
 cmd/pdf/pdf.go | 126 ++++++++++++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 111 insertions(+), 15 deletions(-)

(limited to 'cmd/pdf')

diff --git a/cmd/pdf/pdf.go b/cmd/pdf/pdf.go
index cb6aeb7..4a185a1 100644
--- a/cmd/pdf/pdf.go
+++ b/cmd/pdf/pdf.go
@@ -1,55 +1,151 @@
+/*
+ * Extract vector lines and other paths for each page of a PDF file.
+ *
+ * Run as: go run pdf_extract_lines.go input.pdf
+ */
+
 package main
 
 import (
 	"fmt"
-	"log"
 	"os"
 
+	"github.com/unidoc/unipdf/v4/creator"
 	"github.com/unidoc/unipdf/v4/extractor"
 	"github.com/unidoc/unipdf/v4/model"
 )
 
 func main() {
-	f, err := os.Open("../../test.pdf")
+	// err := reconstruct("../../test.pdf")
+	// if err != nil {
+	// 	fmt.Printf("Error: %v\n", err)
+	// 	os.Exit(1)
+	// }
+
+	err := outputPdfLines("reconstr_words.pdf")
 	if err != nil {
-		log.Fatalf("Failed to open PDF: %v\n", err)
+		fmt.Printf("Error: %v\n", err)
+		os.Exit(1)
 	}
+
+	
+}
+
+// outputPdfLines prints out lines of PDF file to stdout.
+func outputPdfLines(inputPath string) error {
+	f, err := os.Open(inputPath)
+	if err != nil {
+		return err
+	}
+
 	defer f.Close()
+
 	pdfReader, err := model.NewPdfReader(f)
 	if err != nil {
-		log.Fatalf("Failed to read PDF: %v\n", err)
+		return err
 	}
+
 	numPages, err := pdfReader.GetNumPages()
 	if err != nil {
-		log.Fatalf("Failed to retrieve the number of pages: %v\n", err)
+		return err
 	}
-	fmt.Printf("Total number of pages: %d\n", numPages)
+
+	// Iterate through pages.
 
 	fmt.Printf("--------------------\n")
-	fmt.Printf("PDF to text extraction:\n")
+	fmt.Printf("PDF lines extraction:\n")
 	fmt.Printf("--------------------\n")
 	for i := 0; i < numPages; i++ {
 		pageNum := i + 1
 
 		page, err := pdfReader.GetPage(pageNum)
 		if err != nil {
-			panic(err)
+			return err
 		}
 
 		ex, err := extractor.New(page)
 		if err != nil {
-			panic(err)
+			return err
 		}
 
-		text, err := ex.ExtractText()
+		fmt.Println("------------------------------")
+		fmt.Printf("Page %d:\n", pageNum)
+
+		// Extract stroke paths from the current page.
+		paths, err := ex.ExtractStrokePaths()
 		if err != nil {
-			panic(err)
+			return err
 		}
 
-		fmt.Println("------------------------------")
-		fmt.Printf("Page %d:\n", pageNum)
-		fmt.Printf("\"%s\"\n", text)
-		fmt.Println("------------------------------")
+		// Print debugging info.
+		for i, path := range paths {
+			fmt.Printf("Path %d:\n", i)
+			for j, point := range path.Points {
+				fmt.Printf("Point %d: %f %f \n", j, point.X, point.Y)
+			}
+		}
+	}
+
+	return nil
+}
+
+func reconstruct(pdfPath string) error {
+	f, err := os.Open(pdfPath)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	pdfr, err := model.NewPdfReaderLazy(f)
+	if err != nil {
+		return err
+	}
+
+	c := creator.New()
+
+	for pageNum := 1; pageNum <= len(pdfr.PageList); pageNum++ {
+		page, err := pdfr.GetPage(pageNum)
+		if err != nil {
+			return err
+		}
+
+		extr, err := extractor.New(page)
+		if err != nil {
+			return err
+		}
+		pageText, _, _, err := extr.ExtractPageText()
+		if err != nil {
+			return err
+		}
+
+		// Start on a new page.
+		c.NewPage()
+		fmt.Printf("Page %d\n", pageNum)
+
+		text := pageText.Text()
+		textmarks := pageText.Marks()
+		fmt.Printf("%s\n", text)
+
+		// Reconstruct the text, each single TextMark drawn at a time with creator.Paragraph.
+		for _, tm := range textmarks.Elements() {
+			if tm.Font == nil {
+				continue
+			}
+			fmt.Printf("%s\n", tm.Text)
+			// Reconstruct by drawing each glyph from textmarks with the creator package.
+			para := c.NewStyledParagraph()
+			para.SetText(tm.Original)
+			para.SetFont(tm.Font)
+			para.SetFontSize(tm.FontSize)
+			r, g, b, _ := tm.StrokeColor.RGBA()
+			rf, gf, bf := float64(r)/0xffff, float64(g)/0xffff, float64(b)/0xffff
+			para.SetFontColor(creator.ColorRGBFromArithmetic(rf, gf, bf))
+			// Convert to PDF coordinate system.
+			yPos := c.Context().PageHeight - (tm.BBox.Lly + tm.BBox.Height())
+			para.SetPos(tm.BBox.Llx, yPos) // Upper left corner.
+			c.Draw(para)
+		}
 	}
 
+	return c.WriteToFile("reconstr_words.pdf")
 }
-- 
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