/////////////////////////////////////////////////////////////////////////////
// Name:        wx/dcsvg.h
// Purpose:     wxSVGFileDC
// Author:      Chris Elliott
// Modified by:
// Created:
// Copyright:   (c) Chris Elliott
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////
 
#ifndef _WX_DCSVG_H_
#define _WX_DCSVG_H_
 
#include "wx/string.h"
#include "wx/dc.h"
 
#if wxUSE_SVG
 
#include "wx/scopedptr.h"
 
#define wxSVGVersion wxT("v0101")
 
class WXDLLIMPEXP_FWD_BASE wxFileOutputStream;
 
class WXDLLIMPEXP_FWD_CORE wxSVGFileDC;
 
// Base class for bitmap handlers used by wxSVGFileDC, used by the standard
// "embed" and "link" handlers below but can also be used to create a custom
// handler.
class WXDLLIMPEXP_CORE wxSVGBitmapHandler
{
public:
    // Write the representation of the given bitmap, appearing at the specified
    // position, to the provided stream.
    virtual bool ProcessBitmap(const wxBitmap& bitmap,
                               wxCoord x, wxCoord y,
                               wxOutputStream& stream) const = 0;
 
    virtual ~wxSVGBitmapHandler() {}
};
 
// Predefined standard bitmap handler: creates a file, stores the bitmap in
// this file and uses the file URI in the generated SVG.
class WXDLLIMPEXP_CORE wxSVGBitmapFileHandler : public wxSVGBitmapHandler
{
public:
    virtual bool ProcessBitmap(const wxBitmap& bitmap,
                               wxCoord x, wxCoord y,
                               wxOutputStream& stream) const wxOVERRIDE;
};
 
// Predefined handler which embeds the bitmap (base64-encoding it) inside the
// generated SVG file.
class WXDLLIMPEXP_CORE wxSVGBitmapEmbedHandler : public wxSVGBitmapHandler
{
public:
    virtual bool ProcessBitmap(const wxBitmap& bitmap,
                               wxCoord x, wxCoord y,
                               wxOutputStream& stream) const wxOVERRIDE;
};
 
class WXDLLIMPEXP_CORE wxSVGFileDCImpl : public wxDCImpl
{
public:
    wxSVGFileDCImpl( wxSVGFileDC *owner, const wxString &filename,
                     int width = 320, int height = 240, double dpi = 72.0,
                     const wxString &title = wxString() );
 
    virtual ~wxSVGFileDCImpl();
 
    bool IsOk() const wxOVERRIDE { return m_OK; }
 
    virtual bool CanDrawBitmap() const wxOVERRIDE { return true; }
    virtual bool CanGetTextExtent() const wxOVERRIDE { return true; }
 
    virtual int GetDepth() const wxOVERRIDE
    {
        wxFAIL_MSG(wxT("wxSVGFILEDC::GetDepth Call not implemented"));
        return -1;
    }
 
    virtual void Clear() wxOVERRIDE;
 
    virtual void DestroyClippingRegion() wxOVERRIDE;
 
    virtual wxCoord GetCharHeight() const wxOVERRIDE;
    virtual wxCoord GetCharWidth() const wxOVERRIDE;
 
#if wxUSE_PALETTE
    virtual void SetPalette(const wxPalette&  WXUNUSED(palette)) wxOVERRIDE
    {
        wxFAIL_MSG(wxT("wxSVGFILEDC::SetPalette not implemented"));
    }
#endif
 
    virtual void SetLogicalFunction(wxRasterOperationMode WXUNUSED(function)) wxOVERRIDE
    {
        wxFAIL_MSG(wxT("wxSVGFILEDC::SetLogicalFunction Call not implemented"));
    }
 
    virtual wxRasterOperationMode GetLogicalFunction() const wxOVERRIDE
    {
        wxFAIL_MSG(wxT("wxSVGFILEDC::GetLogicalFunction() not implemented"));
        return wxCOPY;
    }
 
    virtual void SetLogicalOrigin(wxCoord x, wxCoord y) wxOVERRIDE
    {
        wxDCImpl::SetLogicalOrigin(x, y);
        m_graphics_changed = true;
    }
 
    virtual void SetDeviceOrigin(wxCoord x, wxCoord y) wxOVERRIDE
    {
        wxDCImpl::SetDeviceOrigin(x, y);
        m_graphics_changed = true;
    }
 
    virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp) wxOVERRIDE
    {
        wxDCImpl::SetAxisOrientation(xLeftRight, yBottomUp);
        m_graphics_changed = true;
    }
 
    virtual void SetBackground( const wxBrush &brush ) wxOVERRIDE;
    virtual void SetBackgroundMode( int mode ) wxOVERRIDE;
    virtual void SetBrush(const wxBrush& brush) wxOVERRIDE;
    virtual void SetFont(const wxFont& font) wxOVERRIDE;
    virtual void SetPen(const wxPen& pen) wxOVERRIDE;
 
    virtual void* GetHandle() const wxOVERRIDE { return NULL; }
 
    void SetBitmapHandler(wxSVGBitmapHandler* handler);
 
private:
   virtual bool DoGetPixel(wxCoord, wxCoord, wxColour *) const wxOVERRIDE
   {
       wxFAIL_MSG(wxT("wxSVGFILEDC::DoGetPixel Call not implemented"));
       return true;
   }
 
   virtual bool DoBlit(wxCoord, wxCoord, wxCoord, wxCoord, wxDC *,
                       wxCoord, wxCoord, wxRasterOperationMode = wxCOPY,
                       bool = 0, int = -1, int = -1) wxOVERRIDE;
 
   virtual void DoCrossHair(wxCoord, wxCoord) wxOVERRIDE
   {
       wxFAIL_MSG(wxT("wxSVGFILEDC::CrossHair Call not implemented"));
   }
 
   virtual void DoDrawArc(wxCoord, wxCoord, wxCoord, wxCoord, wxCoord, wxCoord) wxOVERRIDE;
 
   virtual void DoDrawBitmap(const wxBitmap &, wxCoord, wxCoord, bool = false) wxOVERRIDE;
 
   virtual void DoDrawCheckMark(wxCoord x, wxCoord y, wxCoord w, wxCoord h) wxOVERRIDE;
 
   virtual void DoDrawEllipse(wxCoord x, wxCoord y, wxCoord w, wxCoord h) wxOVERRIDE;
 
   virtual void DoDrawEllipticArc(wxCoord x, wxCoord y, wxCoord w, wxCoord h,
                                  double sa, double ea) wxOVERRIDE;
 
   virtual void DoDrawIcon(const wxIcon &, wxCoord, wxCoord) wxOVERRIDE;
 
   virtual void DoDrawLine (wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2) wxOVERRIDE;
 
   virtual void DoDrawLines(int n, const wxPoint points[],
                            wxCoord xoffset = 0, wxCoord yoffset = 0) wxOVERRIDE;
 
   virtual void DoDrawPoint(wxCoord, wxCoord) wxOVERRIDE;
 
   virtual void DoDrawPolygon(int n, const wxPoint points[],
                              wxCoord xoffset, wxCoord yoffset,
                              wxPolygonFillMode fillStyle) wxOVERRIDE;
 
   virtual void DoDrawPolyPolygon(int n, const int count[], const wxPoint points[],
                                  wxCoord xoffset, wxCoord yoffset,
                                  wxPolygonFillMode fillStyle) wxOVERRIDE;
 
   virtual void DoDrawRectangle(wxCoord x, wxCoord y, wxCoord w, wxCoord h) wxOVERRIDE;
 
   virtual void DoDrawRotatedText(const wxString& text, wxCoord x, wxCoord y,
                                  double angle) wxOVERRIDE;
 
   virtual void DoDrawRoundedRectangle(wxCoord x, wxCoord y,
                                       wxCoord w, wxCoord h,
                                       double radius = 20) wxOVERRIDE ;
 
   virtual void DoDrawText(const wxString& text, wxCoord x, wxCoord y) wxOVERRIDE;
 
   virtual bool DoFloodFill(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
                            const wxColour& WXUNUSED(col),
                            wxFloodFillStyle WXUNUSED(style) = wxFLOOD_SURFACE) wxOVERRIDE
   {
       wxFAIL_MSG(wxT("wxSVGFILEDC::DoFloodFill Call not implemented"));
       return false;
   }
 
   virtual void DoGetSize(int * x, int *y) const wxOVERRIDE
   {
       if ( x )
           *x = m_width;
       if ( y )
           *y = m_height;
   }
 
   virtual void DoGetTextExtent(const wxString& string, wxCoord *w, wxCoord *h,
                                wxCoord *descent = NULL,
                                wxCoord *externalLeading = NULL,
                                const wxFont *font = NULL) const wxOVERRIDE;
 
   virtual void DoSetDeviceClippingRegion(const wxRegion& region) wxOVERRIDE
   {
        DoSetClippingRegion(region.GetBox().x, region.GetBox().y,
                            region.GetBox().width, region.GetBox().height);
   }
 
   virtual void DoSetClippingRegion(int x,  int y, int width, int height) wxOVERRIDE;
 
   virtual void DoGetSizeMM( int *width, int *height ) const wxOVERRIDE;
 
   virtual wxSize GetPPI() const wxOVERRIDE;
 
   void Init (const wxString &filename, int width, int height,
              double dpi, const wxString &title);
 
   void write( const wxString &s );
 
private:
   // If m_graphics_changed is true, close the current <g> element and start a
   // new one for the last pen/brush change.
   void NewGraphicsIfNeeded();
 
   // Open a new graphics group setting up all the attributes according to
   // their current values in wxDC.
   void DoStartNewGraphics();
 
   wxString            m_filename;
   int                 m_sub_images; // number of png format images we have
   bool                m_OK;
   bool                m_graphics_changed;  // set by Set{Brush,Pen}()
   int                 m_width, m_height;
   double              m_dpi;
   wxScopedPtr<wxFileOutputStream> m_outfile;
   wxScopedPtr<wxSVGBitmapHandler> m_bmp_handler; // class to handle bitmaps
 
   // The clipping nesting level is incremented by every call to
   // SetClippingRegion() and reset when DestroyClippingRegion() is called.
   size_t m_clipNestingLevel;
 
   // Unique ID for every clipping graphics group: this is simply always
   // incremented in each SetClippingRegion() call.
   size_t m_clipUniqueId;
 
   wxDECLARE_ABSTRACT_CLASS(wxSVGFileDCImpl);
};
 
 
class WXDLLIMPEXP_CORE wxSVGFileDC : public wxDC
{
public:
    wxSVGFileDC(const wxString& filename,
                int width = 320,
                int height = 240,
                double dpi = 72.0,
                const wxString& title = wxString())
        : wxDC(new wxSVGFileDCImpl(this, filename, width, height, dpi, title))
    {
    }
 
    // wxSVGFileDC-specific methods:
 
    // Use a custom bitmap handler: takes ownership of the handler.
    void SetBitmapHandler(wxSVGBitmapHandler* handler);
};
 
#endif // wxUSE_SVG
 
#endif // _WX_DCSVG_H_