// Copyright (C) 2003-2026, Foxit Software Inc..
// All Rights Reserved.
//
// http://www.foxitsoftware.com
//
// The following code is copyrighted and contains proprietary information and trade secrets of Foxit Software Inc..
// You cannot distribute any part of Foxit PDF SDK to any third party or general public,
// unless there is a separate license agreement with Foxit Software Inc. which explicitly grants you such rights.
//
// This file contains an example to demonstrate how to use Foxit PDF SDK to mark PDF content and
// get marked content from graphics objects.


const FSDK = require("@fuxinsoft/foxit-pdf-sdk-node");
const fs = require('fs');
const os = require('os');
const path = require('path');
const util = require('util');

var sn = "Rew1vB0TqoMIxX444UcpScARWdhgJpsJfzmyMLR32a0+EgrCjp2NaQ==";
var key = "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";

const input_path = "../input_files/";
const output_path = "../output_files/";

class TextDoc {
  constructor(file_name, file_mode) {
    this.file_name = file_name;
    this.file_mode = file_mode;
    this.file_stream = fs.openSync(file_name, file_mode);
    if (!this.file_stream) {
      throw new Error('Cannot open file');
    }
  }
  Write(format, ...args) {
    if(!this.file_stream) 
      throw new Error("File not opened");
    let formatted_string = util.format(format, ...args);
    let buffer = new Buffer.from(formatted_string, 'utf-8');
    fs.writeSync(this.file_stream, buffer, 0, buffer.length);
  }
  WriteWithPrefix(count, prefix, format, ...args){
    for (let i = 0; i < count; i++) {
      this.Write(prefix);
    }
    this.Write(format, ...args);
  }
  Close() {
    fs.closeSync(this.file_stream);
    this.file_stream = null;
  }
}

function CreateMarkedContent(page) {
  position = page.GetLastGraphicsObjectPosition(FSDK.GraphicsObject.e_TypeText);
  let text_object = FSDK.TextObject.Create();

  text_object.SetFillColor(0xFF83AF9B);

  // Prepare text state
  let state = new FSDK.TextState();
  state.font_size = 72.0;
  state.font = new FSDK.Font(FSDK.Font.e_StdIDTimesB);
  state.textmode = FSDK.TextState.e_ModeFill;

  text_object.SetTextState(page, state, false, 750);

  text_object.SetText("Marked-Content");
  page.InsertGraphicsObject(position, text_object);

  let rect = text_object.GetRect();
  let offset_x = (page.GetWidth() - (rect.right - rect.left)) / 2;
  let offset_y = page.GetHeight() * 0.618 - (rect.top - rect.bottom) / 2;
  text_object.Transform(new FSDK.Matrix2D(1, 0, 0, 1, offset_x, offset_y), false);

  let content = text_object.GetMarkedContent();
  let span_dict = FSDK.PDFDictionary.Create();
  span_dict.SetAtInteger("Direct", 55);
  content.AddItem("Span",span_dict);
  span_dict.Release();
  // Generate content
  page.GenerateContent();
}

function GetMarkedContentObject(pdf_file) {
  let doc = new FSDK.PDFDoc(pdf_file);
  let ret = doc.Load("");
  if (ret != FSDK.e_ErrSuccess) {
    console.log("[Failed] Cannot load PDF document %s.\r\n Error message:%d\r\n", pdf_file, ret);
    return false;
  }
  let page = doc.GetPage(0);
  page.StartParse(FSDK.PDFPage.e_ParsePageNormal, null, false);
  let position = page.GetFirstGraphicsObjectPosition(FSDK.GraphicsObject.e_TypeText);
  let text_obj = page.GetGraphicsObject(position).GetTextObject();
  let content = text_obj.GetMarkedContent();
  let item_count = content.GetItemCount();

  let file_info = output_directory + "markedcontent.txt";
  let text_doc = new TextDoc(file_info, "w");
  // Get marked content property
  for (let i = 0; i < item_count; i++) {
    text_doc.Write("index: %d\r\n", i);
    let tag_name = content.GetItemTagName(i);
    text_doc.Write("Tag name: %s\r\n", tag_name);
    let mcid = content.GetItemMCID(i);
    text_doc.Write("mcid: %d\r\n", mcid);
  }
  return true;
}


let error_code = FSDK.Library.Initialize(sn, key);
if (FSDK.e_ErrSuccess != error_code) {
  if (FSDK.e_ErrInvalidLicense == error_code)
    console.log("[Failed] Current used Foxit PDF SDK key information is invalid.");
  else
    console.log("Library Initialize Error: %d", FSDK.e_ErrSuccess);
  return;
}


let output_directory = output_path + "marked_content/";
if (!fs.existsSync(output_directory))  {
  fs.mkdirSync(output_directory);
}

try {
  let doc =new FSDK.PDFDoc();
  let page = doc.InsertPage(0, FSDK.PDFPage.e_SizeLetter);

  CreateMarkedContent(page);

  let output_file = output_directory + "marked_content.pdf";
  doc.SaveAs(output_file, FSDK.PDFDoc.e_SaveFlagNormal);

  if (!GetMarkedContentObject(output_file)) {
    return;
  }
  console.log("Add marked content to PDF file.");

} catch (e) {
  console.log(e);
}
FSDK.Library.Release();