MRPdf.h

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#pragma once
 
#include "config.h"
#ifndef MRIOEXTRAS_NO_PDF
#include "exports.h"
 
#include <hpdf.h>
 
#include <filesystem>
#include <vector>
 
namespace MR
{
 
struct PdfParameters
{
    HPDF_REAL titleSize = 18.f;
    HPDF_REAL textSize = 14.f;
    std::string fontName = "Helvetica";
};
 
class Pdf
{
public:
    MRIOEXTRAS_API Pdf( const std::filesystem::path& documentPath, const PdfParameters& params = PdfParameters() );
    MRIOEXTRAS_API Pdf( Pdf&& other ) noexcept;
    MRIOEXTRAS_API Pdf& operator=( Pdf other ) noexcept; // Sic, passing by value.
    MRIOEXTRAS_API ~Pdf();
 
    Pdf( const Pdf& rhs ) = delete;
    Pdf& operator = ( const Pdf& rhs ) = delete;
 
    MRIOEXTRAS_API void addText( const std::string& text, bool isTitle = false );
 
    MRIOEXTRAS_API void addImageFromFile( const std::filesystem::path& imagePath, const std::string& caption = {},
        const std::vector<std::pair<double, std::string>>& valuesMarks = {} );
 
    MRIOEXTRAS_API void newPage();
 
    MRIOEXTRAS_API void close();
 
    void setCursorPosX( HPDF_REAL posX ) { cursorX_ = posX; };
    void setCursorPosY( HPDF_REAL posY ) { cursorY_ = posY; };
    float getCursorPosX() const { return cursorX_; };
    float getCursorPosY() const { return cursorY_; };
 
    operator bool() const { return state_.document != 0; };
 
private:
    struct State
    {
        HPDF_Doc document = nullptr;
        HPDF_Page activePage = nullptr;
        HPDF_Font activeFont = nullptr;
    };
    State state_;
 
    std::filesystem::path filename_;
 
    PdfParameters params_;
 
    HPDF_REAL cursorX_ = 0;
    HPDF_REAL cursorY_ = 0;
 
    bool checkDocument() const { return state_.document && state_.activePage; };
};
 
}
#endif