// 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 reflow PDF pages.

#include <time.h>
#include <iostream>
#if defined(_WIN32) || defined(_WIN64)
#include<direct.h>
#else
#include <sys/stat.h>
#endif

#include "../../../include/common/fs_common.h"
#include "../../../include/pdf/fs_pdfdoc.h"
#include "../../../include/pdf/fs_pdfpage.h"
#include "../../../include/pdf/fs_reflowpage.h"
#include "../../../include/common/fs_render.h"

using namespace std;
using namespace foxit;
using namespace foxit::common;
using foxit::common::Library;
using namespace pdf;

static const char* sn = "bPxThFlBAYifO3yiW0C51bKbjPap1zHaf5aG5sX378TjFvB7Q0802A==";
static const char* key = "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";

#if defined(_WIN32) || defined(_WIN64)
static WString output_path = WString::FromLocal("../output_files/");
static WString input_path = WString::FromLocal("../input_files/");
#else
static WString output_path = WString::FromLocal("./output_files/");
static WString input_path = WString::FromLocal("./input_files/");
#endif

class SdkLibMgr {
public:
  SdkLibMgr() : is_initialize_(false){};
  ErrorCode Initialize() {
    ErrorCode error_code = Library::Initialize(sn, key);
    if (error_code != foxit::e_ErrSuccess) {
      printf("Library Initialize Error: %d\n", error_code);
    } else {
      is_initialize_ = true;
    }
    return error_code;

  }
  ~SdkLibMgr(){
    if(is_initialize_)
      Library::Release();
  }
private:
  bool is_initialize_;
};

WString output_directory = output_path + L"pdfreflow/";

const void SaveBitmap(Bitmap bitmap, int index,WString file_name) {
  RectF margin = RectF(50,30,30,30);
  PointF size = PointF(480,800);
  RectI rect(0, 0, static_cast<int>(size.x), static_cast<int>(margin.top));
  bitmap.FillRect(0xFFFFFFFF, &rect);
  rect = RectI(0, static_cast<int>(size.y - margin.bottom), static_cast<int>(size.x), static_cast<int>(size.y));
  bitmap.FillRect(0xFFFFFFFF, &rect);
  Image image;
  image.AddFrame(bitmap);

  WString save_path;
  WString sIndex;
  sIndex.Format((FX_LPCWSTR)L"%d",index);
  save_path = output_directory + L"reflow" + file_name + sIndex + L".bmp";
  image.SaveAs(save_path);
}

// The change for the size of the picture depends on the size of the content of reflow page.
void ReflowSingle(PDFDoc doc) {
  RectF margin = RectF(50,30,30,30);
  PointF size = PointF(480,800);
  int page_count = doc.GetPageCount();
  for (int i=0;i<page_count;i++) {
    PDFPage page = doc.GetPage(i);
    // Parse PDF page.
    page.StartParse(foxit::pdf::PDFPage::e_ParsePageNormal, NULL, false);

    ReflowPage reflow_page(page);
    // Set some arguments used for parsing the relfow page.
    reflow_page.SetLineSpace(0);
    reflow_page.SetScreenMargin(static_cast<int>(margin.left), static_cast<int>(margin.top),
      static_cast<int>(margin.right), static_cast<int>(margin.bottom));
    reflow_page.SetScreenSize(size.x, size.y);
    reflow_page.SetZoom(100);
    reflow_page.SetParseFlags(ReflowPage::e_Normal);

    // Parse reflow page.
    reflow_page.StartParse(NULL);

    // Get actual size of content of reflow page. The content size does not contain the margin.
    float content_width = reflow_page.GetContentWidth();
    float content_height = reflow_page.GetContentHeight();

    // Create a bitmap for rendering the reflow page. The bitmap size contains the margin.
    Bitmap bitmap(static_cast<int>(content_width + margin.left + margin.right),
      static_cast<int>(content_height + margin.top + margin.bottom), foxit::common::Bitmap::e_DIBArgb, NULL, 0);
    bitmap.FillRect(0xFFFFFFFF, NULL);

    // Render reflow page.
    Renderer renderer(bitmap, false);
    foxit::Matrix matrix = reflow_page.GetDisplayMatrix(0, 0,content_width,content_height,Rotation::e_Rotation0);
    renderer.StartRenderReflowPage(reflow_page, matrix, NULL);
    WString file_name = L"_single_";
    SaveBitmap(bitmap, i,file_name);
  }

}

// Fixed bitmap size, just to simulate split screen situation.
void ReflowContinuous(PDFDoc doc) {
  RectF margin = RectF(50,30,30,30);
  PointF size = PointF(480,800);
  float display_height = size.y - margin.top - margin.bottom;
  Bitmap bitmap(static_cast<int>(size.x), static_cast<int>(size.y), foxit::common::Bitmap::e_DIBArgb, NULL, 0);
  float offset_y = 0;
  int page_count = doc.GetPageCount();

  int bitmap_index = 0;

  for(int i=0;i<page_count;i++)
  {
    PDFPage page = doc.GetPage(i);

    // Parse PDF page.
    page.StartParse(foxit::pdf::PDFPage::e_ParsePageNormal, NULL, false);

    ReflowPage reflow_page(page);
    // Set some arguments used for parsing the relfow page.
    reflow_page.SetLineSpace(0);
    reflow_page.SetScreenMargin(static_cast<int>(margin.left), static_cast<int>(margin.top),
      static_cast<int>(margin.right), static_cast<int>(margin.bottom));
    reflow_page.SetScreenSize(size.x, size.y);
    reflow_page.SetZoom(100);
    reflow_page.SetParseFlags(ReflowPage::e_WithImage);

    reflow_page.SetTopSpace(offset_y);

    // Parse reflow page.
    reflow_page.StartParse(NULL);

    // Get actual size of content of reflow page.
    // The content size does not contain the margin but contains the top space.
    float content_height = reflow_page.GetContentHeight();
    float content_width = reflow_page.GetContentWidth();
    // Render reflow page.
    Renderer renderer(bitmap, false);
    foxit::Matrix matrix = reflow_page.GetDisplayMatrix(0, 0,(int)content_width,(int)content_height,foxit::common::Rotation::e_Rotation0);
    renderer.StartRenderReflowPage(reflow_page, matrix, NULL);

    int rate_need_screen_count = static_cast<int>(ceil(max(content_height - display_height, 0.0f) / display_height));
    if (rate_need_screen_count > 0) {
      // Before do next rendering, save current bitmap first.
      WString file_name = L"_continuous_";
      SaveBitmap(bitmap, bitmap_index++,file_name);

      float has_display_height = display_height;
      for (int j = 0; j < rate_need_screen_count; j++) {
        // Clear the bitmap and used it to do next rendering.
        bitmap.FillRect(0xFFFFFFFF, NULL);
        // Render reflow page.
        Renderer renderer(bitmap, false);
        foxit::Matrix matrix = reflow_page.GetDisplayMatrix(0, -has_display_height,content_width,content_height,Rotation::e_Rotation0);
        renderer.StartRenderReflowPage(reflow_page, matrix, NULL);
        if (j != rate_need_screen_count - 1) {
          has_display_height += display_height;
          SaveBitmap(bitmap,  bitmap_index++,file_name);
        } else {
          offset_y = content_height - rate_need_screen_count * display_height;
        }
      }
    } else {
      offset_y = content_height;
    }
  }
  WString file_name = L"_continuous_";
  SaveBitmap(bitmap,  bitmap_index++,file_name);

}
int main(int argc, char *argv[])
{
#if defined(_WIN32) || defined(_WIN64)
  _mkdir(String::FromUnicode(output_directory));
#else
  mkdir(String::FromUnicode(output_directory), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
#endif

  int err_ret = 0;
  WString input_file = input_path + L"AboutFoxit.pdf";
  SdkLibMgr sdk_lib_mgr;
  // Initialize library
  ErrorCode error_code = sdk_lib_mgr.Initialize();
  if (error_code != foxit::e_ErrSuccess) {
    return 1;
  }

  try {
    PDFDoc doc=PDFDoc(input_file);
    ErrorCode error_code = doc.Load();
    if (error_code != foxit::e_ErrSuccess) {
      printf("The Doc [%s] Error: %d\n", (const char*)String::FromUnicode(input_file), error_code);
      return 1;
    }
    ReflowContinuous(doc);
    ReflowSingle(doc);

    cout << "Reflow test." << endl;
  } catch (const Exception& e) {
    cout << e.GetMessage() << endl;
    err_ret = 1;
  }
  catch(...)
  {
    cout << "Unknown Exception" << endl;
    err_ret = 1;
  }

  return err_ret;
}

