XpdfWidget.h

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//========================================================================
//
// XpdfWidget.h
//
// Copyright 2009 Glyph & Cog, LLC
//
//========================================================================



#ifndef XPDFWIDGET_H
#define XPDFWIDGET_H

#include <aconf.h>

#ifdef USE_GCC_PRAGMAS
#pragma interface
#endif

#include <QAbstractScrollArea>

class QMutex;

class GString;
class QtPDFCore;

//------------------------------------------------------------------------

typedef void *XpdfOutlineHandle;

typedef void *XpdfLayerHandle;

//------------------------------------------------------------------------

class XpdfWidget: public QAbstractScrollArea {
  Q_OBJECT

public:

  enum ErrorCode {
    pdfOk               =    0, 
    pdfErrOpenFile      =    1, 
    pdfErrBadCatalog    =    2, 
    pdfErrDamaged       =    3, 

    pdfErrEncrypted     =    4, 

    pdfErrHighlightFile =    5, 
    pdfErrBadPrinter    =    6, 
    pdfErrPrinting      =    7, 
    pdfErrPermission    =    8, 
    pdfErrBadPageNum    =    9, 
    pdfErrFileIO        =   10, 
    pdfErrNoHandle      = 1001, 
    pdfErrOutOfMemory   = 1002, 
    pdfErrBusy          = 1003, 
    pdfErrBadArg        = 1004  
  };


  static const int zoomToPage  = -1;    
  static const int zoomToWidth = -2;    




  static const int findBackward      = 0x00000001;
  static const int findCaseSensitive = 0x00000002;
  static const int findNext          = 0x00000004;
  static const int findOnePageOnly   = 0x00000008;

  static void init(const QString &configFileName = QString());

  static void setConfig(const QString &command);

  XpdfWidget(const QColor &paperColor = QColor(0xff, 0xff, 0xff),
             const QColor &matteColor = QColor(0x80, 0x80, 0x80),
             bool reverseVideo = false, QWidget *parentA = 0);

  virtual ~XpdfWidget();

  void enableHyperlinks(bool on);

  void enableSelect(bool on);

  void enablePan(bool on);

  void setKeyPassthrough(bool on) { keyPassthrough = on; }

  void showPasswordDialog(bool showDlg);

  void setMatteColor(const QColor &matteColor);

  void setReverseVideo(bool reverse);

  ErrorCode loadFile(const QString &fileName,
                     const QString &password = "");

  ErrorCode loadMem(const char *buffer, unsigned int bufferLength,
                    const QString &password = "");

  void closeFile();

  ErrorCode saveAs(const QString &fileName);

  QString getFileName();

  int getNumPages();

  int getCurrentPage();

  void gotoPage(int pageNum);

  void gotoFirstPage();

  void gotoLastPage();

  void gotoNextPage();

  void gotoPreviousPage();

  bool gotoNamedDestination(const QString &dest);

  void goForward();

  void goBackward();

  void scrollPageUp();

  void scrollPageDown();

  void scrollTo(int xx, int yy);

  void scrollBy(int dx, int dy);

  int getScrollX();

  int getScrollY();

  void setZoom(double zoom);

  double getZoom();

  double getZoomPercent();

  void zoomToRect(int page, double xMin, double yMin,
                  double xMax, double yMax);

  void zoomCentered(double zoom);

  void zoomToCurrentWidth();

  void setRotate(int rotate);

  int getRotate();

  void setContinuousMode(bool continuous);

  bool getContinuousMode();

  bool onLink(int page, double xx, double yy);

  void gotoLinkAt(int page, double xx, double yy);

  void convertWindowToPDFCoords(int winX, int winY,
                                int *page, double *pdfX, double *pdfY);

  void convertPDFToWindowCoords(int page, double pdfX, double pdfY,
                                int *winX, int *winY);

  void enableRedraw(bool enable);

  void getPageBox(int page, const QString &box,
                  double *xMin, double *yMin, double *xMax, double *yMax);

  double getPageWidth(int page);

  double getPageHeight(int page);

  int getPageRotation(int page);

  bool getCurrentSelection(int *page, double *x0, double *y0,
                           double *x1, double *y1);

  void setCurrentSelection(int page, double x0, double y0,
                           double x1, double y1);

  QImage *convertPageToImage(int page, double dpi);

  QImage *convertRegionToImage(int page, double x0, double y0,
                               double x1, double y1, double dpi);

  bool okToExtractText();

  void setTextEncoding(const QString &encodingName);

  QString extractText(int page, double x0, double y0,
                      double x1, double y1);

  void copySelection();

  bool find(const QString &text, int flags = 0);

  int getOutlineNumChildren(XpdfOutlineHandle outline);

  XpdfOutlineHandle getOutlineChild(XpdfOutlineHandle outline, int idx);

  QString getOutlineTitle(XpdfOutlineHandle outline);

  bool getOutlineStartsOpen(XpdfOutlineHandle outline);

  int getOutlineTargetPage(XpdfOutlineHandle outline);

  void gotoOutlineTarget(XpdfOutlineHandle outline);

  int getNumLayers();

  XpdfLayerHandle getLayer(int idx);

  QString getLayerName(XpdfLayerHandle layer);

  bool getLayerVisibility(XpdfLayerHandle layer);

  void setLayerVisibility(XpdfLayerHandle layer, bool visibility);

  int getLayerViewState(XpdfLayerHandle layer);

  int getLayerPrintState(XpdfLayerHandle layer);

signals:

  void pageChange(int pageNum);

  void midPageChange(int pageNum);

  void keyPress(QKeyEvent *e);

  void mousePress(QMouseEvent *e);

  void mouseRelease(QMouseEvent *e);

  void mouseMove(QMouseEvent *e);

  void linkClick(const QString &linkType, const QString &dest, int page);

  void selectDone();

protected:


  virtual void paintEvent(QPaintEvent *eventA);
  virtual void resizeEvent(QResizeEvent *eventA);
  virtual void scrollContentsBy(int dx, int dy);
  virtual void keyPressEvent(QKeyEvent *e);
  virtual void mousePressEvent(QMouseEvent *e);
  virtual void mouseReleaseEvent(QMouseEvent *e);
  virtual void mouseMoveEvent(QMouseEvent *e);


private:

  static void updateCbk(void *data, GString *fileName,
                        int pageNum, int numPages, char *linkLabel);
  static void midPageChangedCbk(void *data, int pageNum);
  static void linkCbk(void *data, char *type, char *dest, int page);
  static void selectDoneCbk(void *data);


  static QMutex initMutex;

  QtPDFCore *core;

  bool keyPassthrough;
};

#endif

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