src/html/m_image.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        m_image.cpp
// Purpose:     wxHtml module for displaying images
// Author:      Vaclav Slavik
// RCS-ID:      $Id$
// Copyright:   (c) 1999 Vaclav Slavik, Joel Lucsy
// Licence:     wxWindows Licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation
#endif

#include "wx/wxprec.h"

#include "wx/defs.h"
#if wxUSE_HTML && wxUSE_STREAMS

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#ifndef WXPRECOMP
    #include "wx/dc.h"
    #include "wx/scrolwin.h"
    #include "wx/timer.h"
    #include "wx/dcmemory.h"
#endif

#include "wx/html/forcelnk.h"
#include "wx/html/m_templ.h"
#include "wx/html/htmlwin.h"

#include "wx/image.h"
#include "wx/gifdecod.h"
#include "wx/dynarray.h"
#include "wx/log.h"
#include "wx/artprov.h"

#include <math.h>
#include <float.h>

FORCE_LINK_ME(m_image)


WX_DECLARE_OBJARRAY(int, CoordArray);
#include "wx/arrimpl.cpp" // this is a magic incantation which must be done!
WX_DEFINE_OBJARRAY(CoordArray);


//--------------------------------------------------------------------------------
// wxHtmlImageMapAreaCell
//                  0-width, 0-height cell that represents single area in imagemap
//                  (it's GetLink is called from wxHtmlImageCell's)
//--------------------------------------------------------------------------------

class wxHtmlImageMapAreaCell : public wxHtmlCell
{
    public:
        enum celltype { CIRCLE, RECT, POLY };
    protected:
        CoordArray coords;
        celltype type;
        int radius;
    public:
        wxHtmlImageMapAreaCell( celltype t, wxString &coords, double pixel_scale = 1.0);
        virtual wxHtmlLinkInfo *GetLink( int x = 0, int y = 0 ) const;
};


wxHtmlImageMapAreaCell::wxHtmlImageMapAreaCell( wxHtmlImageMapAreaCell::celltype t, wxString &incoords, double pixel_scale )
{
    int i;
    wxString x = incoords, y;

    type = t;
    while ((i = x.Find( ',' )) != -1)
    {
        coords.Add( (int)(pixel_scale * (double)wxAtoi( x.Left( i ).c_str())) );
        x = x.Mid( i + 1 );
    }
    coords.Add( (int)(pixel_scale * (double)wxAtoi( x.c_str())) );
}

wxHtmlLinkInfo *wxHtmlImageMapAreaCell::GetLink( int x, int y ) const
{
    switch (type)
    {
        case RECT:
            {
                int l, t, r, b;

                l = coords[ 0 ];
                t = coords[ 1 ];
                r = coords[ 2 ];
                b = coords[ 3 ];
                if (x >= l && x <= r && y >= t && y <= b)
                {
                    return m_Link;
                }
                break;
            }
        case CIRCLE:
            {
                int l, t, r;
                double  d;

                l = coords[ 0 ];
                t = coords[ 1 ];
                r = coords[ 2 ];
                d = sqrt( (double) (((x - l) * (x - l)) + ((y - t) * (y - t))) );
                if (d < (double)r)
                {
                    return m_Link;
                }
            }
            break;
        case POLY:
            {
                if (coords.GetCount() >= 6)
                {
                    int intersects = 0;
                    int wherex = x;
                    int wherey = y;
                    int totalv = coords.GetCount() / 2;
                    int totalc = totalv * 2;
                    int xval = coords[totalc - 2];
                    int yval = coords[totalc - 1];
                    int end = totalc;
                    int pointer = 1;

                    if ((yval >= wherey) != (coords[pointer] >= wherey))
                    {
                        if ((xval >= wherex) == (coords[0] >= wherex))
                        {
                            intersects += (xval >= wherex) ? 1 : 0;
                        }
                        else
                        {
                            intersects += ((xval - (yval - wherey) *
                                            (coords[0] - xval) /
                                            (coords[pointer] - yval)) >= wherex) ? 1 : 0;
                        }
                    }

                    while (pointer < end)
                    {
                        yval = coords[pointer];
                        pointer += 2;
                        if (yval >= wherey)
                        {
                            while ((pointer < end) && (coords[pointer] >= wherey))
                            {
                                pointer += 2;
                            }
                            if (pointer >= end)
                            {
                                break;
                            }
                            if ((coords[pointer - 3] >= wherex) ==
                                    (coords[pointer - 1] >= wherex)) {
                                intersects += (coords[pointer - 3] >= wherex) ? 1 : 0;
                            }
                            else
                            {
                                intersects +=
                                    ((coords[pointer - 3] - (coords[pointer - 2] - wherey) *
                                      (coords[pointer - 1] - coords[pointer - 3]) /
                                      (coords[pointer] - coords[pointer - 2])) >= wherex) ? 1 : 0;
                            }
                        }
                        else
                        {
                            while ((pointer < end) && (coords[pointer] < wherey))
                            {
                                pointer += 2;
                            }
                            if (pointer >= end)
                            {
                                break;
                            }
                            if ((coords[pointer - 3] >= wherex) ==
                                    (coords[pointer - 1] >= wherex))
                            {
                                intersects += (coords[pointer - 3] >= wherex) ? 1 : 0;
                            }
                            else
                            {
                                intersects +=
                                    ((coords[pointer - 3] - (coords[pointer - 2] - wherey) *
                                      (coords[pointer - 1] - coords[pointer - 3]) /
                                      (coords[pointer] - coords[pointer - 2])) >= wherex) ? 1 : 0;
                            }
                        }
                    }
                    if ((intersects & 1) != 0)
                    {
                        return m_Link;
                    }
                }
            }
            break;
    }

    if (m_Next)
    {
        wxHtmlImageMapAreaCell  *a = (wxHtmlImageMapAreaCell*)m_Next;
        return a->GetLink( x, y );
    }
    return NULL;
}


//--------------------------------------------------------------------------------
// wxHtmlImageMapCell
//                  0-width, 0-height cell that represents map from imagemaps
//                  it is always placed before wxHtmlImageMapAreaCells
//                  It responds to Find(wxHTML_COND_ISIMAGEMAP)
//--------------------------------------------------------------------------------


class wxHtmlImageMapCell : public wxHtmlCell
{
    public:
        wxHtmlImageMapCell( wxString &name );
    protected:
        wxString m_Name;
    public:
        virtual wxHtmlLinkInfo *GetLink( int x = 0, int y = 0 ) const;
        virtual const wxHtmlCell *Find( int cond, const void *param ) const;
};


wxHtmlImageMapCell::wxHtmlImageMapCell( wxString &name )
{
    m_Name = name ;
}

wxHtmlLinkInfo *wxHtmlImageMapCell::GetLink( int x, int y ) const
{
    wxHtmlImageMapAreaCell  *a = (wxHtmlImageMapAreaCell*)m_Next;
    if (a)
        return a->GetLink( x, y );
    return wxHtmlCell::GetLink( x, y );
}

const wxHtmlCell *wxHtmlImageMapCell::Find( int cond, const void *param ) const
{
    if (cond == wxHTML_COND_ISIMAGEMAP)
    {
        if (m_Name == *((wxString*)(param)))
            return this;
    }
    return wxHtmlCell::Find(cond, param);
}


//--------------------------------------------------------------------------------
// wxHtmlImageCell
//                  Image/bitmap
//--------------------------------------------------------------------------------

class wxHtmlImageCell : public wxHtmlCell
{
public:
    wxHtmlImageCell(wxWindow *window,
                    wxFSFile *input, int w = -1, int h = -1,
                    double scale = 1.0, int align = wxHTML_ALIGN_BOTTOM,
                    const wxString& mapname = wxEmptyString);
    ~wxHtmlImageCell();
    void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2);
    virtual wxHtmlLinkInfo *GetLink(int x = 0, int y = 0) const;

    void SetImage(const wxImage& img);
#if wxUSE_GIF && wxUSE_TIMER
    void AdvanceAnimation(wxTimer *timer);
    virtual void Layout(int w);
#endif

private:
    wxBitmap           *m_bitmap;
    int                 m_bmpW, m_bmpH;
    bool                m_showFrame:1;
    wxScrolledWindow   *m_window;
#if wxUSE_GIF && wxUSE_TIMER
    wxGIFDecoder       *m_gifDecoder;
    wxTimer            *m_gifTimer;
    int                 m_physX, m_physY;
#endif
    double              m_scale;
    wxHtmlImageMapCell *m_imageMap;
    wxString            m_mapName;

    DECLARE_NO_COPY_CLASS(wxHtmlImageCell)
};

#if wxUSE_GIF && wxUSE_TIMER
class wxGIFTimer : public wxTimer
{
    public:
        wxGIFTimer(wxHtmlImageCell *cell) : m_cell(cell) {}
        virtual void Notify()
        {
            m_cell->AdvanceAnimation(this);
        }

    private:
        wxHtmlImageCell *m_cell;

    DECLARE_NO_COPY_CLASS(wxGIFTimer)
};
#endif


//----------------------------------------------------------------------------
// wxHtmlImageCell
//----------------------------------------------------------------------------


wxHtmlImageCell::wxHtmlImageCell(wxWindow *window, wxFSFile *input,
                                 int w, int h, double scale, int align,
                                 const wxString& mapname) : wxHtmlCell()
{
    m_window = window ? wxStaticCast(window, wxScrolledWindow) : NULL;
    m_scale = scale;
    m_showFrame = FALSE;
    m_bitmap = NULL;
    m_bmpW = w;
    m_bmpH = h;
    m_imageMap = NULL;
    m_mapName = mapname;
    SetCanLiveOnPagebreak(FALSE);
#if wxUSE_GIF && wxUSE_TIMER
    m_gifDecoder = NULL;
    m_gifTimer = NULL;
    m_physX = m_physY = -1;
#endif

    if ( m_bmpW && m_bmpH )
    {
        if ( input )
        {
            wxInputStream *s = input->GetStream();

            if ( s )
            {
                bool readImg = TRUE;

#if wxUSE_GIF && wxUSE_TIMER
                if ( (input->GetLocation().Matches(wxT("*.gif")) ||
                      input->GetLocation().Matches(wxT("*.GIF"))) && m_window )
                {
                    m_gifDecoder = new wxGIFDecoder(s, TRUE);
                    if ( m_gifDecoder->ReadGIF() == wxGIF_OK )
                    {
                        wxImage img;
                        if ( m_gifDecoder->ConvertToImage(&img) )
                            SetImage(img);

                        readImg = FALSE;

                        if ( m_gifDecoder->IsAnimation() )
                        {
                            m_gifTimer = new wxGIFTimer(this);
                            m_gifTimer->Start(m_gifDecoder->GetDelay(), TRUE);
                        }
                        else
                        {
                            wxDELETE(m_gifDecoder);
                        }
                    }
                    else
                    {
                        wxDELETE(m_gifDecoder);
                    }
                }

                if ( readImg )
#endif // wxUSE_GIF && wxUSE_TIMER
                {
                    wxImage image(*s, wxBITMAP_TYPE_ANY);
                    if ( image.Ok() )
                        SetImage(image);
                }
            }
        }
        else // input==NULL, use "broken image" bitmap
        {
            if ( m_bmpW == -1 && m_bmpH == -1 )
            {
                m_bmpW = 29;
                m_bmpH = 31;
            }
            else
            {
                m_showFrame = TRUE;
                if ( m_bmpW == -1 ) m_bmpW = 31;
                if ( m_bmpH == -1 ) m_bmpH = 33;
            }
            m_bitmap =
                new wxBitmap(wxArtProvider::GetBitmap(wxART_MISSING_IMAGE));
        }
    }
    //else: ignore the 0-sized images used sometimes on the Web pages

    m_Width = (int)(scale * (double)m_bmpW);
    m_Height = (int)(scale * (double)m_bmpH);

    switch (align)
    {
        case wxHTML_ALIGN_TOP :
            m_Descent = m_Height;
            break;
        case wxHTML_ALIGN_CENTER :
            m_Descent = m_Height / 2;
            break;
        case wxHTML_ALIGN_BOTTOM :
        default :
            m_Descent = 0;
            break;
    }
 }

void wxHtmlImageCell::SetImage(const wxImage& img)
{
    if ( img.Ok() )
    {
        delete m_bitmap;

        int ww, hh;
        ww = img.GetWidth();
        hh = img.GetHeight();

        if ( m_bmpW == -1 )
            m_bmpW = ww;
        if ( m_bmpH == -1 )
            m_bmpH = hh;

        if ((m_bmpW != ww) || (m_bmpH != hh))
        {
            wxImage img2 = img.Scale(m_bmpW, m_bmpH);
            m_bitmap = new wxBitmap(img2);
        }
        else
            m_bitmap = new wxBitmap(img);
    }
}

#if wxUSE_GIF && wxUSE_TIMER
void wxHtmlImageCell::AdvanceAnimation(wxTimer *timer)
{
    wxImage img;

    m_gifDecoder->GoNextFrame(TRUE);

    if ( m_physX == -1 )
    {
        m_physX = m_physY = 0;
        for (wxHtmlCell *cell = this; cell; cell = cell->GetParent())
        {
            m_physX += cell->GetPosX();
            m_physY += cell->GetPosY();
        }
    }

    int x, y;
    m_window->CalcScrolledPosition(m_physX, m_physY, &x, &y);
    wxRect rect(x, y, m_Width, m_Height);

    if ( m_window->GetClientRect().Intersects(rect) &&
         m_gifDecoder->ConvertToImage(&img) )
    {
        if ( (int)m_gifDecoder->GetWidth() != m_Width ||
             (int)m_gifDecoder->GetHeight() != m_Height ||
             m_gifDecoder->GetLeft() != 0 || m_gifDecoder->GetTop() != 0 )
        {
            wxBitmap bmp(img);
            wxMemoryDC dc;
            dc.SelectObject(*m_bitmap);
            dc.DrawBitmap(bmp, m_gifDecoder->GetLeft(), m_gifDecoder->GetTop());
        }
        else
            SetImage(img);
        m_window->Refresh(img.HasMask(), &rect);
    }

    timer->Start(m_gifDecoder->GetDelay(), TRUE);
}

void wxHtmlImageCell::Layout(int w)
{
    wxHtmlCell::Layout(w);
    m_physX = m_physY = -1;
}

#endif

wxHtmlImageCell::~wxHtmlImageCell()
{
    delete m_bitmap;
#if wxUSE_GIF && wxUSE_TIMER
    delete m_gifTimer;
    delete m_gifDecoder;
#endif
}


void wxHtmlImageCell::Draw(wxDC& dc, int x, int y, int WXUNUSED(view_y1), int WXUNUSED(view_y2))
{
    if ( m_showFrame )
    {
        dc.SetBrush(*wxTRANSPARENT_BRUSH);
        dc.SetPen(*wxBLACK_PEN);
        dc.DrawRectangle(x + m_PosX, y + m_PosY, m_Width, m_Height);
        x++, y++;
    }
    if ( m_bitmap )
    {
        double us_x, us_y;
        dc.GetUserScale(&us_x, &us_y);
        dc.SetUserScale(us_x * m_scale, us_y * m_scale);

        dc.DrawBitmap(*m_bitmap, (int) ((x + m_PosX) / m_scale),
                                 (int) ((y + m_PosY) / m_scale), TRUE);
        dc.SetUserScale(us_x, us_y);
    }
}

wxHtmlLinkInfo *wxHtmlImageCell::GetLink( int x, int y ) const
{
    if (m_mapName.IsEmpty())
        return wxHtmlCell::GetLink( x, y );
    if (!m_imageMap)
    {
        wxHtmlContainerCell *p, *op;
        op = p = GetParent();
        while (p)
        {
            op = p;
            p = p->GetParent();
        }
        p = op;
        wxHtmlCell *cell = (wxHtmlCell*)p->Find(wxHTML_COND_ISIMAGEMAP,
                                                (const void*)(&m_mapName));
        if (!cell)
        {
            ((wxString&)m_mapName).Clear();
            return wxHtmlCell::GetLink( x, y );
        }
        {   // dirty hack, ask Joel why he fills m_ImageMap in this place
            // THE problem is that we're in const method and we can't modify m_ImageMap
            wxHtmlImageMapCell **cx = (wxHtmlImageMapCell**)(&m_imageMap);
            *cx = (wxHtmlImageMapCell*)cell;
        }
    }
    return m_imageMap->GetLink(x, y);
}


//--------------------------------------------------------------------------------
// tag handler
//--------------------------------------------------------------------------------

TAG_HANDLER_BEGIN(IMG, "IMG,MAP,AREA")

    TAG_HANDLER_PROC(tag)
    {
        if (tag.GetName() == wxT("IMG"))
        {
            if (tag.HasParam(wxT("SRC")))
            {
                int w = -1, h = -1;
                int al;
                wxFSFile *str;
                wxString tmp = tag.GetParam(wxT("SRC"));
                wxString mn = wxEmptyString;

                str = m_WParser->OpenURL(wxHTML_URL_IMAGE, tmp);

                if (tag.HasParam(wxT("WIDTH")))
                    tag.GetParamAsInt(wxT("WIDTH"), &w);
                if (tag.HasParam(wxT("HEIGHT")))
                    tag.GetParamAsInt(wxT("HEIGHT"), &h);
                al = wxHTML_ALIGN_BOTTOM;
                if (tag.HasParam(wxT("ALIGN")))
                {
                    wxString alstr = tag.GetParam(wxT("ALIGN"));
                    alstr.MakeUpper();  // for the case alignment was in ".."
                    if (alstr == wxT("TEXTTOP"))
                        al = wxHTML_ALIGN_TOP;
                    else if ((alstr == wxT("CENTER")) || (alstr == wxT("ABSCENTER")))
                        al = wxHTML_ALIGN_CENTER;
                }
                if (tag.HasParam(wxT("USEMAP")))
                {
                    mn = tag.GetParam( wxT("USEMAP") );
                    if (mn.GetChar(0) == wxT('#'))
                    {
                        mn = mn.Mid( 1 );
                    }
                }
                wxHtmlImageCell *cel = new wxHtmlImageCell(
                                          m_WParser->GetWindow(),
                                          str, w, h,
                                          m_WParser->GetPixelScale(),
                                          al, mn);
                cel->SetLink(m_WParser->GetLink());
                cel->SetId(tag.GetParam(wxT("id"))); // may be empty
                m_WParser->GetContainer()->InsertCell(cel);
                if (str)
                    delete str;
            }
        }
        if (tag.GetName() == wxT("MAP"))
        {
            m_WParser->CloseContainer();
            m_WParser->OpenContainer();
            if (tag.HasParam(wxT("NAME")))
            {
                wxString tmp = tag.GetParam(wxT("NAME"));
                wxHtmlImageMapCell *cel = new wxHtmlImageMapCell( tmp );
                m_WParser->GetContainer()->InsertCell( cel );
            }
            ParseInner( tag );
            m_WParser->CloseContainer();
            m_WParser->OpenContainer();
        }
        if (tag.GetName() == wxT("AREA"))
        {
            if (tag.HasParam(wxT("SHAPE")))
            {
                wxString tmp = tag.GetParam(wxT("SHAPE"));
                wxString coords = wxEmptyString;
                tmp.MakeUpper();
                wxHtmlImageMapAreaCell *cel = NULL;
                if (tag.HasParam(wxT("COORDS")))
                {
                    coords = tag.GetParam(wxT("COORDS"));
                }
                if (tmp == wxT("POLY"))
                {
                    cel = new wxHtmlImageMapAreaCell( wxHtmlImageMapAreaCell::POLY, coords, m_WParser->GetPixelScale() );
                }
                else if (tmp == wxT("CIRCLE"))
                {
                    cel = new wxHtmlImageMapAreaCell( wxHtmlImageMapAreaCell::CIRCLE, coords, m_WParser->GetPixelScale() );
                }
                else if (tmp == wxT("RECT"))
                {
                    cel = new wxHtmlImageMapAreaCell( wxHtmlImageMapAreaCell::RECT, coords, m_WParser->GetPixelScale() );
                }
                if (cel != NULL && tag.HasParam(wxT("HREF")))
                {
                    wxString tmp = tag.GetParam(wxT("HREF"));
                    wxString target = wxEmptyString;
                    if (tag.HasParam(wxT("TARGET"))) target = tag.GetParam(wxT("TARGET"));
                    cel->SetLink( wxHtmlLinkInfo(tmp, target));
                }
                if (cel != NULL) m_WParser->GetContainer()->InsertCell( cel );
            }
        }

        return FALSE;
    }

TAG_HANDLER_END(IMG)


TAGS_MODULE_BEGIN(Image)

    TAGS_MODULE_ADD(IMG)

TAGS_MODULE_END(Image)


#endif
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: m_image.cpp
	3	// Purpose: wxHtml module for displaying images
	4	// Author: Vaclav Slavik
	5	// RCS-ID: $Id$
	6	// Copyright: (c) 1999 Vaclav Slavik, Joel Lucsy
	7	// Licence: wxWindows Licence
	8	/////////////////////////////////////////////////////////////////////////////
	9
	10	#ifdef __GNUG__
	11	#pragma implementation
	12	#endif
	13
	14	#include "wx/wxprec.h"
	15
	16	#include "wx/defs.h"
	17	#if wxUSE_HTML && wxUSE_STREAMS
	18
	19	#ifdef __BORLANDC__
	20	#pragma hdrstop
	21	#endif
	22
	23	#ifndef WXPRECOMP
	24	#include "wx/dc.h"
	25	#include "wx/scrolwin.h"
	26	#include "wx/timer.h"
	27	#include "wx/dcmemory.h"
	28	#endif
	29
	30	#include "wx/html/forcelnk.h"
	31	#include "wx/html/m_templ.h"
	32	#include "wx/html/htmlwin.h"
	33
	34	#include "wx/image.h"
	35	#include "wx/gifdecod.h"
	36	#include "wx/dynarray.h"
	37	#include "wx/log.h"
	38	#include "wx/artprov.h"
	39
	40	#include <math.h>
	41	#include <float.h>
	42
	43	FORCE_LINK_ME(m_image)
	44
	45
	46
	47
	48	WX_DECLARE_OBJARRAY(int, CoordArray);
	49	#include "wx/arrimpl.cpp" // this is a magic incantation which must be done!
	50	WX_DEFINE_OBJARRAY(CoordArray);
	51
	52
	53	//--------------------------------------------------------------------------------
	54	// wxHtmlImageMapAreaCell
	55	// 0-width, 0-height cell that represents single area in imagemap
	56	// (it's GetLink is called from wxHtmlImageCell's)
	57	//--------------------------------------------------------------------------------
	58
	59	class wxHtmlImageMapAreaCell : public wxHtmlCell
	60	{
	61	public:
	62	enum celltype { CIRCLE, RECT, POLY };
	63	protected:
	64	CoordArray coords;
	65	celltype type;
	66	int radius;
	67	public:
	68	wxHtmlImageMapAreaCell( celltype t, wxString &coords, double pixel_scale = 1.0);
	69	virtual wxHtmlLinkInfo *GetLink( int x = 0, int y = 0 ) const;
	70	};
	71
	72
	73
	74
	75
	76	wxHtmlImageMapAreaCell::wxHtmlImageMapAreaCell( wxHtmlImageMapAreaCell::celltype t, wxString &incoords, double pixel_scale )
	77	{
	78	int i;
	79	wxString x = incoords, y;
	80
	81	type = t;
	82	while ((i = x.Find( ',' )) != -1)
	83	{
	84	coords.Add( (int)(pixel_scale * (double)wxAtoi( x.Left( i ).c_str())) );
	85	x = x.Mid( i + 1 );
	86	}
	87	coords.Add( (int)(pixel_scale * (double)wxAtoi( x.c_str())) );
	88	}
	89
	90	wxHtmlLinkInfo *wxHtmlImageMapAreaCell::GetLink( int x, int y ) const
	91	{
	92	switch (type)
	93	{
	94	case RECT:
	95	{
	96	int l, t, r, b;
	97
	98	l = coords[ 0 ];
	99	t = coords[ 1 ];
	100	r = coords[ 2 ];
	101	b = coords[ 3 ];
	102	if (x >= l && x <= r && y >= t && y <= b)
	103	{
	104	return m_Link;
	105	}
	106	break;
	107	}
	108	case CIRCLE:
	109	{
	110	int l, t, r;
	111	double d;
	112
	113	l = coords[ 0 ];
	114	t = coords[ 1 ];
	115	r = coords[ 2 ];
	116	d = sqrt( (double) (((x - l) * (x - l)) + ((y - t) * (y - t))) );
	117	if (d < (double)r)
	118	{
	119	return m_Link;
	120	}
	121	}
	122	break;
	123	case POLY:
	124	{
	125	if (coords.GetCount() >= 6)
	126	{
	127	int intersects = 0;
	128	int wherex = x;
	129	int wherey = y;
	130	int totalv = coords.GetCount() / 2;
	131	int totalc = totalv * 2;
	132	int xval = coords[totalc - 2];
	133	int yval = coords[totalc - 1];
	134	int end = totalc;
	135	int pointer = 1;
	136
	137	if ((yval >= wherey) != (coords[pointer] >= wherey))
	138	{
	139	if ((xval >= wherex) == (coords[0] >= wherex))
	140	{
	141	intersects += (xval >= wherex) ? 1 : 0;
	142	}
	143	else
	144	{
	145	intersects += ((xval - (yval - wherey) *
	146	(coords[0] - xval) /
	147	(coords[pointer] - yval)) >= wherex) ? 1 : 0;
	148	}
	149	}
	150
	151	while (pointer < end)
	152	{
	153	yval = coords[pointer];
	154	pointer += 2;
	155	if (yval >= wherey)
	156	{
	157	while ((pointer < end) && (coords[pointer] >= wherey))
	158	{
	159	pointer += 2;
	160	}
	161	if (pointer >= end)
	162	{
	163	break;
	164	}
	165	if ((coords[pointer - 3] >= wherex) ==
	166	(coords[pointer - 1] >= wherex)) {
	167	intersects += (coords[pointer - 3] >= wherex) ? 1 : 0;
	168	}
	169	else
	170	{
	171	intersects +=
	172	((coords[pointer - 3] - (coords[pointer - 2] - wherey) *
	173	(coords[pointer - 1] - coords[pointer - 3]) /
	174	(coords[pointer] - coords[pointer - 2])) >= wherex) ? 1 : 0;
	175	}
	176	}
	177	else
	178	{
	179	while ((pointer < end) && (coords[pointer] < wherey))
	180	{
	181	pointer += 2;
	182	}
	183	if (pointer >= end)
	184	{
	185	break;
	186	}
	187	if ((coords[pointer - 3] >= wherex) ==
	188	(coords[pointer - 1] >= wherex))
	189	{
	190	intersects += (coords[pointer - 3] >= wherex) ? 1 : 0;
	191	}
	192	else
	193	{
	194	intersects +=
	195	((coords[pointer - 3] - (coords[pointer - 2] - wherey) *
	196	(coords[pointer - 1] - coords[pointer - 3]) /
	197	(coords[pointer] - coords[pointer - 2])) >= wherex) ? 1 : 0;
	198	}
	199	}
	200	}
	201	if ((intersects & 1) != 0)
	202	{
	203	return m_Link;
	204	}
	205	}
	206	}
	207	break;
	208	}
	209
	210	if (m_Next)
	211	{
	212	wxHtmlImageMapAreaCell a = (wxHtmlImageMapAreaCell)m_Next;
	213	return a->GetLink( x, y );
	214	}
	215	return NULL;
	216	}
	217
	218
	219
	220
	221
	222
	223
	224
	225	//--------------------------------------------------------------------------------
	226	// wxHtmlImageMapCell
	227	// 0-width, 0-height cell that represents map from imagemaps
	228	// it is always placed before wxHtmlImageMapAreaCells
	229	// It responds to Find(wxHTML_COND_ISIMAGEMAP)
	230	//--------------------------------------------------------------------------------
	231
	232
	233	class wxHtmlImageMapCell : public wxHtmlCell
	234	{
	235	public:
	236	wxHtmlImageMapCell( wxString &name );
	237	protected:
	238	wxString m_Name;
	239	public:
	240	virtual wxHtmlLinkInfo *GetLink( int x = 0, int y = 0 ) const;
	241	virtual const wxHtmlCell Find( int cond, const void param ) const;
	242	};
	243
	244
	245	wxHtmlImageMapCell::wxHtmlImageMapCell( wxString &name )
	246	{
	247	m_Name = name ;
	248	}
	249
	250	wxHtmlLinkInfo *wxHtmlImageMapCell::GetLink( int x, int y ) const
	251	{
	252	wxHtmlImageMapAreaCell a = (wxHtmlImageMapAreaCell)m_Next;
	253	if (a)
	254	return a->GetLink( x, y );
	255	return wxHtmlCell::GetLink( x, y );
	256	}
	257
	258	const wxHtmlCell wxHtmlImageMapCell::Find( int cond, const void param ) const
	259	{
	260	if (cond == wxHTML_COND_ISIMAGEMAP)
	261	{
	262	if (m_Name == ((wxString)(param)))
	263	return this;
	264	}
	265	return wxHtmlCell::Find(cond, param);
	266	}
	267
	268
	269
	270
	271
	272	//--------------------------------------------------------------------------------
	273	// wxHtmlImageCell
	274	// Image/bitmap
	275	//--------------------------------------------------------------------------------
	276
	277	class wxHtmlImageCell : public wxHtmlCell
	278	{
	279	public:
	280	wxHtmlImageCell(wxWindow *window,
	281	wxFSFile *input, int w = -1, int h = -1,
	282	double scale = 1.0, int align = wxHTML_ALIGN_BOTTOM,
	283	const wxString& mapname = wxEmptyString);
	284	~wxHtmlImageCell();
	285	void Draw(wxDC& dc, int x, int y, int view_y1, int view_y2);
	286	virtual wxHtmlLinkInfo *GetLink(int x = 0, int y = 0) const;
	287
	288	void SetImage(const wxImage& img);
	289	#if wxUSE_GIF && wxUSE_TIMER
	290	void AdvanceAnimation(wxTimer *timer);
	291	virtual void Layout(int w);
	292	#endif
	293
	294	private:
	295	wxBitmap *m_bitmap;
	296	int m_bmpW, m_bmpH;
	297	bool m_showFrame:1;
	298	wxScrolledWindow *m_window;
	299	#if wxUSE_GIF && wxUSE_TIMER
	300	wxGIFDecoder *m_gifDecoder;
	301	wxTimer *m_gifTimer;
	302	int m_physX, m_physY;
	303	#endif
	304	double m_scale;
	305	wxHtmlImageMapCell *m_imageMap;
	306	wxString m_mapName;
	307
	308	DECLARE_NO_COPY_CLASS(wxHtmlImageCell)
	309	};
	310
	311	#if wxUSE_GIF && wxUSE_TIMER
	312	class wxGIFTimer : public wxTimer
	313	{
	314	public:
	315	wxGIFTimer(wxHtmlImageCell *cell) : m_cell(cell) {}
	316	virtual void Notify()
	317	{
	318	m_cell->AdvanceAnimation(this);
	319	}
	320
	321	private:
	322	wxHtmlImageCell *m_cell;
	323
	324	DECLARE_NO_COPY_CLASS(wxGIFTimer)
	325	};
	326	#endif
	327
	328
	329	//----------------------------------------------------------------------------
	330	// wxHtmlImageCell
	331	//----------------------------------------------------------------------------
	332
	333
	334	wxHtmlImageCell::wxHtmlImageCell(wxWindow window, wxFSFile input,
	335	int w, int h, double scale, int align,
	336	const wxString& mapname) : wxHtmlCell()
	337	{
	338	m_window = window ? wxStaticCast(window, wxScrolledWindow) : NULL;
	339	m_scale = scale;
	340	m_showFrame = FALSE;
	341	m_bitmap = NULL;
	342	m_bmpW = w;
	343	m_bmpH = h;
	344	m_imageMap = NULL;
	345	m_mapName = mapname;
	346	SetCanLiveOnPagebreak(FALSE);
	347	#if wxUSE_GIF && wxUSE_TIMER
	348	m_gifDecoder = NULL;
	349	m_gifTimer = NULL;
	350	m_physX = m_physY = -1;
	351	#endif
	352
	353	if ( m_bmpW && m_bmpH )
	354	{
	355	if ( input )
	356	{
	357	wxInputStream *s = input->GetStream();
	358
	359	if ( s )
	360	{
	361	bool readImg = TRUE;
	362
	363	#if wxUSE_GIF && wxUSE_TIMER
	364	if ( (input->GetLocation().Matches(wxT("*.gif")) \|\|
	365	input->GetLocation().Matches(wxT("*.GIF"))) && m_window )
	366	{
	367	m_gifDecoder = new wxGIFDecoder(s, TRUE);
	368	if ( m_gifDecoder->ReadGIF() == wxGIF_OK )
	369	{
	370	wxImage img;
	371	if ( m_gifDecoder->ConvertToImage(&img) )
	372	SetImage(img);
	373
	374	readImg = FALSE;
	375
	376	if ( m_gifDecoder->IsAnimation() )
	377	{
	378	m_gifTimer = new wxGIFTimer(this);
	379	m_gifTimer->Start(m_gifDecoder->GetDelay(), TRUE);
	380	}
	381	else
	382	{
	383	wxDELETE(m_gifDecoder);
	384	}
	385	}
	386	else
	387	{
	388	wxDELETE(m_gifDecoder);
	389	}
	390	}
	391
	392	if ( readImg )
	393	#endif // wxUSE_GIF && wxUSE_TIMER
	394	{
	395	wxImage image(*s, wxBITMAP_TYPE_ANY);
	396	if ( image.Ok() )
	397	SetImage(image);
	398	}
	399	}
	400	}
	401	else // input==NULL, use "broken image" bitmap
	402	{
	403	if ( m_bmpW == -1 && m_bmpH == -1 )
	404	{
	405	m_bmpW = 29;
	406	m_bmpH = 31;
	407	}
	408	else
	409	{
	410	m_showFrame = TRUE;
	411	if ( m_bmpW == -1 ) m_bmpW = 31;
	412	if ( m_bmpH == -1 ) m_bmpH = 33;
	413	}
	414	m_bitmap =
	415	new wxBitmap(wxArtProvider::GetBitmap(wxART_MISSING_IMAGE));
	416	}
	417	}
	418	//else: ignore the 0-sized images used sometimes on the Web pages
	419
	420	m_Width = (int)(scale * (double)m_bmpW);
	421	m_Height = (int)(scale * (double)m_bmpH);
	422
	423	switch (align)
	424	{
	425	case wxHTML_ALIGN_TOP :
	426	m_Descent = m_Height;
	427	break;
	428	case wxHTML_ALIGN_CENTER :
	429	m_Descent = m_Height / 2;
	430	break;
	431	case wxHTML_ALIGN_BOTTOM :
	432	default :
	433	m_Descent = 0;
	434	break;
	435	}
	436	}
	437
	438	void wxHtmlImageCell::SetImage(const wxImage& img)
	439	{
	440	if ( img.Ok() )
	441	{
	442	delete m_bitmap;
	443
	444	int ww, hh;
	445	ww = img.GetWidth();
	446	hh = img.GetHeight();
	447
	448	if ( m_bmpW == -1 )
	449	m_bmpW = ww;
	450	if ( m_bmpH == -1 )
	451	m_bmpH = hh;
	452
	453	if ((m_bmpW != ww) \|\| (m_bmpH != hh))
	454	{
	455	wxImage img2 = img.Scale(m_bmpW, m_bmpH);
	456	m_bitmap = new wxBitmap(img2);
	457	}
	458	else
	459	m_bitmap = new wxBitmap(img);
	460	}
	461	}
	462
	463	#if wxUSE_GIF && wxUSE_TIMER
	464	void wxHtmlImageCell::AdvanceAnimation(wxTimer *timer)
	465	{
	466	wxImage img;
	467
	468	m_gifDecoder->GoNextFrame(TRUE);
	469
	470	if ( m_physX == -1 )
	471	{
	472	m_physX = m_physY = 0;
	473	for (wxHtmlCell *cell = this; cell; cell = cell->GetParent())
	474	{
	475	m_physX += cell->GetPosX();
	476	m_physY += cell->GetPosY();
	477	}
	478	}
	479
	480	int x, y;
	481	m_window->CalcScrolledPosition(m_physX, m_physY, &x, &y);
	482	wxRect rect(x, y, m_Width, m_Height);
	483
	484	if ( m_window->GetClientRect().Intersects(rect) &&
	485	m_gifDecoder->ConvertToImage(&img) )
	486	{
	487	if ( (int)m_gifDecoder->GetWidth() != m_Width \|\|
	488	(int)m_gifDecoder->GetHeight() != m_Height \|\|
	489	m_gifDecoder->GetLeft() != 0 \|\| m_gifDecoder->GetTop() != 0 )
	490	{
	491	wxBitmap bmp(img);
	492	wxMemoryDC dc;
	493	dc.SelectObject(*m_bitmap);
	494	dc.DrawBitmap(bmp, m_gifDecoder->GetLeft(), m_gifDecoder->GetTop());
	495	}
	496	else
	497	SetImage(img);
	498	m_window->Refresh(img.HasMask(), &rect);
	499	}
	500
	501	timer->Start(m_gifDecoder->GetDelay(), TRUE);
	502	}
	503
	504	void wxHtmlImageCell::Layout(int w)
	505	{
	506	wxHtmlCell::Layout(w);
	507	m_physX = m_physY = -1;
	508	}
	509
	510	#endif
	511
	512	wxHtmlImageCell::~wxHtmlImageCell()
	513	{
	514	delete m_bitmap;
	515	#if wxUSE_GIF && wxUSE_TIMER
	516	delete m_gifTimer;
	517	delete m_gifDecoder;
	518	#endif
	519	}
	520
	521
	522	void wxHtmlImageCell::Draw(wxDC& dc, int x, int y, int WXUNUSED(view_y1), int WXUNUSED(view_y2))
	523	{
	524	if ( m_showFrame )
	525	{
	526	dc.SetBrush(*wxTRANSPARENT_BRUSH);
	527	dc.SetPen(*wxBLACK_PEN);
	528	dc.DrawRectangle(x + m_PosX, y + m_PosY, m_Width, m_Height);
	529	x++, y++;
	530	}
	531	if ( m_bitmap )
	532	{
	533	double us_x, us_y;
	534	dc.GetUserScale(&us_x, &us_y);
	535	dc.SetUserScale(us_x * m_scale, us_y * m_scale);
	536
	537	dc.DrawBitmap(*m_bitmap, (int) ((x + m_PosX) / m_scale),
	538	(int) ((y + m_PosY) / m_scale), TRUE);
	539	dc.SetUserScale(us_x, us_y);
	540	}
	541	}
	542
	543	wxHtmlLinkInfo *wxHtmlImageCell::GetLink( int x, int y ) const
	544	{
	545	if (m_mapName.IsEmpty())
	546	return wxHtmlCell::GetLink( x, y );
	547	if (!m_imageMap)
	548	{
	549	wxHtmlContainerCell p, op;
	550	op = p = GetParent();
	551	while (p)
	552	{
	553	op = p;
	554	p = p->GetParent();
	555	}
	556	p = op;
	557	wxHtmlCell cell = (wxHtmlCell)p->Find(wxHTML_COND_ISIMAGEMAP,
	558	(const void*)(&m_mapName));
	559	if (!cell)
	560	{
	561	((wxString&)m_mapName).Clear();
	562	return wxHtmlCell::GetLink( x, y );
	563	}
	564	{ // dirty hack, ask Joel why he fills m_ImageMap in this place
	565	// THE problem is that we're in const method and we can't modify m_ImageMap
	566	wxHtmlImageMapCell cx = (wxHtmlImageMapCell)(&m_imageMap);
	567	cx = (wxHtmlImageMapCell)cell;
	568	}
	569	}
	570	return m_imageMap->GetLink(x, y);
	571	}
	572
	573
	574
	575	//--------------------------------------------------------------------------------
	576	// tag handler
	577	//--------------------------------------------------------------------------------
	578
	579	TAG_HANDLER_BEGIN(IMG, "IMG,MAP,AREA")
	580
	581	TAG_HANDLER_PROC(tag)
	582	{
	583	if (tag.GetName() == wxT("IMG"))
	584	{
	585	if (tag.HasParam(wxT("SRC")))
	586	{
	587	int w = -1, h = -1;
	588	int al;
	589	wxFSFile *str;
	590	wxString tmp = tag.GetParam(wxT("SRC"));
	591	wxString mn = wxEmptyString;
	592
	593	str = m_WParser->OpenURL(wxHTML_URL_IMAGE, tmp);
	594
	595	if (tag.HasParam(wxT("WIDTH")))
	596	tag.GetParamAsInt(wxT("WIDTH"), &w);
	597	if (tag.HasParam(wxT("HEIGHT")))
	598	tag.GetParamAsInt(wxT("HEIGHT"), &h);
	599	al = wxHTML_ALIGN_BOTTOM;
	600	if (tag.HasParam(wxT("ALIGN")))
	601	{
	602	wxString alstr = tag.GetParam(wxT("ALIGN"));
	603	alstr.MakeUpper(); // for the case alignment was in ".."
	604	if (alstr == wxT("TEXTTOP"))
	605	al = wxHTML_ALIGN_TOP;
	606	else if ((alstr == wxT("CENTER")) \|\| (alstr == wxT("ABSCENTER")))
	607	al = wxHTML_ALIGN_CENTER;
	608	}
	609	if (tag.HasParam(wxT("USEMAP")))
	610	{
	611	mn = tag.GetParam( wxT("USEMAP") );
	612	if (mn.GetChar(0) == wxT('#'))
	613	{
	614	mn = mn.Mid( 1 );
	615	}
	616	}
	617	wxHtmlImageCell *cel = new wxHtmlImageCell(
	618	m_WParser->GetWindow(),
	619	str, w, h,
	620	m_WParser->GetPixelScale(),
	621	al, mn);
	622	cel->SetLink(m_WParser->GetLink());
	623	cel->SetId(tag.GetParam(wxT("id"))); // may be empty
	624	m_WParser->GetContainer()->InsertCell(cel);
	625	if (str)
	626	delete str;
	627	}
	628	}
	629	if (tag.GetName() == wxT("MAP"))
	630	{
	631	m_WParser->CloseContainer();
	632	m_WParser->OpenContainer();
	633	if (tag.HasParam(wxT("NAME")))
	634	{
	635	wxString tmp = tag.GetParam(wxT("NAME"));
	636	wxHtmlImageMapCell *cel = new wxHtmlImageMapCell( tmp );
	637	m_WParser->GetContainer()->InsertCell( cel );
	638	}
	639	ParseInner( tag );
	640	m_WParser->CloseContainer();
	641	m_WParser->OpenContainer();
	642	}
	643	if (tag.GetName() == wxT("AREA"))
	644	{
	645	if (tag.HasParam(wxT("SHAPE")))
	646	{
	647	wxString tmp = tag.GetParam(wxT("SHAPE"));
	648	wxString coords = wxEmptyString;
	649	tmp.MakeUpper();
	650	wxHtmlImageMapAreaCell *cel = NULL;
	651	if (tag.HasParam(wxT("COORDS")))
	652	{
	653	coords = tag.GetParam(wxT("COORDS"));
	654	}
	655	if (tmp == wxT("POLY"))
	656	{
	657	cel = new wxHtmlImageMapAreaCell( wxHtmlImageMapAreaCell::POLY, coords, m_WParser->GetPixelScale() );
	658	}
	659	else if (tmp == wxT("CIRCLE"))
	660	{
	661	cel = new wxHtmlImageMapAreaCell( wxHtmlImageMapAreaCell::CIRCLE, coords, m_WParser->GetPixelScale() );
	662	}
	663	else if (tmp == wxT("RECT"))
	664	{
	665	cel = new wxHtmlImageMapAreaCell( wxHtmlImageMapAreaCell::RECT, coords, m_WParser->GetPixelScale() );
	666	}
	667	if (cel != NULL && tag.HasParam(wxT("HREF")))
	668	{
	669	wxString tmp = tag.GetParam(wxT("HREF"));
	670	wxString target = wxEmptyString;
	671	if (tag.HasParam(wxT("TARGET"))) target = tag.GetParam(wxT("TARGET"));
	672	cel->SetLink( wxHtmlLinkInfo(tmp, target));
	673	}
	674	if (cel != NULL) m_WParser->GetContainer()->InsertCell( cel );
	675	}
	676	}
	677
	678	return FALSE;
	679	}
	680
	681	TAG_HANDLER_END(IMG)
	682
	683
	684
	685	TAGS_MODULE_BEGIN(Image)
	686
	687	TAGS_MODULE_ADD(IMG)
	688
	689	TAGS_MODULE_END(Image)
	690
	691
	692	#endif