ccpdfdocument.h

#ifndef CCPDFDOCUMENT_H
#define CCPDFDOCUMENT_H
 
#include "mupdf_tools/mupdf_tools.h"
#include <QObject>
#include <optional>
 
/* 
 * Forward declarations related to MuPDF C API.
 * fz_context manages the global MuPDF context.
 * fz_document represents a loaded PDF document.
 */
struct fz_context;
struct fz_document;
struct CCPdfDocumentPrivate;
 
class CCPdfDocument : public QObject {
    Q_OBJECT
public:
    explicit CCPdfDocument(QObject* parent = nullptr);
 
    explicit CCPdfDocument(const QString& document_path);
 
    ~CCPdfDocument();
    Q_DISABLE_COPY(CCPdfDocument);
 
    enum class ErrorCode {
        NO_ERROR,       
        FILE_NOT_EXSIT, 
        OTHER_MISTAKES  
    };
 
    ErrorCode load_document(const QString& document_path);
 
    bool close_document();
 
    bool document_loaded() const;
 
    std::optional<uint32_t> document_page() const;
 
    fz_document* raw_handle() const;
 
    fz_context* raw_context() const;
 
    CCPdfMetaInfo meta_info() const;
 
    inline int current_page() const { return current_page_index; }
 
    inline QString current_path() const { return holding_path; }
 
    inline int total_pages() const { return total_page; }
 
    enum class PageNavigationError {
        PAGE_OK,        
        PAGE_UNDERFLOW, 
        PAGE_OVERFLOW,  
        PAGE_UNEXSITS   
    };
 
    PageNavigationError jump(const int page_index);
 
signals:
    void document_load(const QString document_path);
 
    void pageIndexChanged();
 
private:
    CCPdfDocumentPrivate* privated; 
    QString holding_path; 
    int current_page_index { -1 }; 
    int total_page { -1 }; 
};
 
#endif // CCPDFDOCUMENT_H