return reference to non-temporary wxString instance from wxGetTranslation() even...

[wxWidgets.git] / src / html / htmlcell.cpp

diff --git a/src/html/htmlcell.cpp b/src/html/htmlcell.cpp
index 986f6436f00d6df41f1707f539b4043ede7d7909..4bed6f3f9c75b7d3a99b9d7671657fe73e1d05a2 100644 (file)
--- a/src/html/htmlcell.cpp
+++ b/src/html/htmlcell.cpp
@@ -1,48 +1,35 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        htmlcell.cpp
+// Name:        src/html/htmlcell.cpp

 // Purpose:     wxHtmlCell - basic element of HTML output
 // Author:      Vaclav Slavik
 // RCS-ID:      $Id$
 // Copyright:   (c) 1999 Vaclav Slavik
 // Purpose:     wxHtmlCell - basic element of HTML output
 // Author:      Vaclav Slavik
 // RCS-ID:      $Id$
 // Copyright:   (c) 1999 Vaclav Slavik

-// Licence:     wxWidgets Licence
+// Licence:     wxWindows licence

 /////////////////////////////////////////////////////////////////////////////
 
 /////////////////////////////////////////////////////////////////////////////
 

-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-#pragma implementation "htmlcell.h"
-#endif
-

 #include "wx/wxprec.h"
 
 #include "wx/wxprec.h"
 

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

 #ifdef __BORLANDC__
 #ifdef __BORLANDC__

-#pragma hdrstop
+    #pragma hdrstop

 #endif
 
 #endif
 

-#ifndef WXPRECOMP
+#if wxUSE_HTML && wxUSE_STREAMS
+
+#ifndef WX_PRECOMP
+    #include "wx/dynarray.h"

     #include "wx/brush.h"
     #include "wx/colour.h"
     #include "wx/dc.h"
     #include "wx/brush.h"
     #include "wx/colour.h"
     #include "wx/dc.h"

+    #include "wx/settings.h"
+    #include "wx/module.h"
+    #include "wx/wxcrtvararg.h"

 #endif
 
 #include "wx/html/htmlcell.h"
 #include "wx/html/htmlwin.h"
 #endif
 
 #include "wx/html/htmlcell.h"
 #include "wx/html/htmlwin.h"

-#include "wx/settings.h"
-#include "wx/module.h"
-#include "wx/dynarray.h"

 
 #include <stdlib.h>
 
 
 #include <stdlib.h>
 

-//-----------------------------------------------------------------------------
-// Global variables
-//-----------------------------------------------------------------------------
-
-static wxCursor *gs_cursorLink = NULL;
-static wxCursor *gs_cursorText = NULL;
-
-

 //-----------------------------------------------------------------------------
 // Helper classes
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
 // Helper classes
 //-----------------------------------------------------------------------------


@@ -94,6 +81,8 @@ wxHtmlCell::wxHtmlCell() : wxObject()
     m_Next = NULL;
     m_Parent = NULL;
     m_Width = m_Height = m_Descent = 0;
     m_Next = NULL;
     m_Parent = NULL;
     m_Width = m_Height = m_Descent = 0;

+    m_ScriptMode = wxHTML_SCRIPT_NORMAL;        // <sub> or <sup> mode
+    m_ScriptBaseline = 0;                       // <sub> or <sup> baseline

     m_CanLiveOnPagebreak = true;
     m_Link = NULL;
 }
     m_CanLiveOnPagebreak = true;
     m_Link = NULL;
 }


@@ -103,37 +92,136 @@ wxHtmlCell::~wxHtmlCell()
     delete m_Link;
 }
 
     delete m_Link;
 }
 

+// Update the descent value when whe are in a <sub> or <sup>.
+// prevbase is the parent base
+void wxHtmlCell::SetScriptMode(wxHtmlScriptMode mode, long previousBase)
+{
+    m_ScriptMode = mode;
+
+    if (mode == wxHTML_SCRIPT_SUP)
+        m_ScriptBaseline = previousBase - (m_Height + 1) / 2;
+    else if (mode == wxHTML_SCRIPT_SUB)
+        m_ScriptBaseline = previousBase + (m_Height + 1) / 6;
+    else
+        m_ScriptBaseline = 0;
+
+    m_Descent += m_ScriptBaseline;
+}

 
 

-void wxHtmlCell::OnMouseClick(wxWindow *parent, int x, int y,
-                              const wxMouseEvent& event)
+#if WXWIN_COMPATIBILITY_2_6
+
+struct wxHtmlCellOnMouseClickCompatHelper;
+
+static wxHtmlCellOnMouseClickCompatHelper *gs_helperOnMouseClick = NULL;
+
+// helper for routing calls to new ProcessMouseClick() method to deprecated
+// OnMouseClick() method
+struct wxHtmlCellOnMouseClickCompatHelper
+{
+    wxHtmlCellOnMouseClickCompatHelper(wxHtmlWindowInterface *window_,
+                                       const wxPoint& pos_,
+                                       const wxMouseEvent& event_)
+        : window(window_), pos(pos_), event(event_), retval(false)
+    {
+    }
+
+    bool CallOnMouseClick(wxHtmlCell *cell)
+    {
+        wxHtmlCellOnMouseClickCompatHelper *oldHelper = gs_helperOnMouseClick;
+        gs_helperOnMouseClick = this;
+        cell->OnMouseClick
+              (
+                window ? window->GetHTMLWindow() : NULL,
+                pos.x, pos.y,
+                event
+              );
+        gs_helperOnMouseClick = oldHelper;
+        return retval;
+    }
+
+    wxHtmlWindowInterface *window;
+    const wxPoint& pos;
+    const wxMouseEvent& event;
+    bool retval;
+};
+#endif // WXWIN_COMPATIBILITY_2_6
+
+bool wxHtmlCell::ProcessMouseClick(wxHtmlWindowInterface *window,
+                                   const wxPoint& pos,
+                                   const wxMouseEvent& event)

 {
 {

-    wxHtmlLinkInfo *lnk = GetLink(x, y);
-    if (lnk != NULL)
+    wxCHECK_MSG( window, false, _T("window interface must be provided") );
+
+#if WXWIN_COMPATIBILITY_2_6
+    // NB: this hack puts the body of ProcessMouseClick() into OnMouseClick()
+    //     (for which it has to pass the arguments and return value via a
+    //     helper variable because these two methods have different
+    //     signatures), so that old code overriding OnMouseClick will continue
+    //     to work
+    wxHtmlCellOnMouseClickCompatHelper compat(window, pos, event);
+    return compat.CallOnMouseClick(this);
+}
+
+void wxHtmlCell::OnMouseClick(wxWindow *, int, int, const wxMouseEvent& event)
+{
+    wxCHECK_RET( gs_helperOnMouseClick, _T("unexpected call to OnMouseClick") );
+    wxHtmlWindowInterface *window = gs_helperOnMouseClick->window;
+    const wxPoint& pos = gs_helperOnMouseClick->pos;
+#endif // WXWIN_COMPATIBILITY_2_6
+
+    wxHtmlLinkInfo *lnk = GetLink(pos.x, pos.y);
+    bool retval = false;
+
+    if (lnk)

     {
         wxHtmlLinkInfo lnk2(*lnk);
         lnk2.SetEvent(&event);
         lnk2.SetHtmlCell(this);
 
     {
         wxHtmlLinkInfo lnk2(*lnk);
         lnk2.SetEvent(&event);
         lnk2.SetHtmlCell(this);
 

-        // note : this cast is legal because parent is *always* wxHtmlWindow
-        wxStaticCast(parent, wxHtmlWindow)->OnLinkClicked(lnk2);
+        window->OnHTMLLinkClicked(lnk2);
+        retval = true;

     }
     }

-}

 
 

+#if WXWIN_COMPATIBILITY_2_6
+    gs_helperOnMouseClick->retval = retval;
+#else
+    return retval;
+#endif // WXWIN_COMPATIBILITY_2_6
+}

 
 

+#if WXWIN_COMPATIBILITY_2_6

 wxCursor wxHtmlCell::GetCursor() const
 {
 wxCursor wxHtmlCell::GetCursor() const
 {

+    return wxNullCursor;
+}
+#endif // WXWIN_COMPATIBILITY_2_6
+
+wxCursor wxHtmlCell::GetMouseCursor(wxHtmlWindowInterface *window) const
+{
+#if WXWIN_COMPATIBILITY_2_6
+    // NB: Older versions of wx used GetCursor() virtual method in place of
+    //     GetMouseCursor(interface). This code ensures that user code that
+    //     overriden GetCursor() continues to work. The trick is that the base
+    //     wxHtmlCell::GetCursor() method simply returns wxNullCursor, so we
+    //     know that GetCursor() was overriden iff it returns valid cursor.
+    wxCursor cur = GetCursor();
+    if (cur.Ok())
+        return cur;
+#endif // WXWIN_COMPATIBILITY_2_6
+

     if ( GetLink() )
     {
     if ( GetLink() )
     {

-        if ( !gs_cursorLink )
-            gs_cursorLink = new wxCursor(wxCURSOR_HAND);
-        return *gs_cursorLink;
+        return window->GetHTMLCursor(wxHtmlWindowInterface::HTMLCursor_Link);

     }
     else
     }
     else

-        return *wxSTANDARD_CURSOR;
+    {
+        return window->GetHTMLCursor(wxHtmlWindowInterface::HTMLCursor_Default);
+    }

 }
 
 
 }
 
 

-bool wxHtmlCell::AdjustPagebreak(int *pagebreak, int* WXUNUSED(known_pagebreaks), int WXUNUSED(number_of_pages)) const
+bool wxHtmlCell::AdjustPagebreak(int *pagebreak,
+                                 wxArrayInt& WXUNUSED(known_pagebreaks)) const

 {
     if ((!m_CanLiveOnPagebreak) &&
                 m_PosY < *pagebreak && m_PosY + m_Height > *pagebreak)
 {
     if ((!m_CanLiveOnPagebreak) &&
                 m_PosY < *pagebreak && m_PosY + m_Height > *pagebreak)


@@ -190,10 +278,11 @@ wxHtmlCell *wxHtmlCell::FindCellByPos(wxCoord x, wxCoord y,
 }
 
 
 }
 
 

-wxPoint wxHtmlCell::GetAbsPos() const
+wxPoint wxHtmlCell::GetAbsPos(wxHtmlCell *rootCell) const

 {
     wxPoint p(m_PosX, m_PosY);
 {
     wxPoint p(m_PosX, m_PosY);

-    for (wxHtmlCell *parent = m_Parent; parent; parent = parent->m_Parent)
+    for (wxHtmlCell *parent = m_Parent; parent && parent != rootCell;
+         parent = parent->m_Parent)

     {
         p.x += parent->m_PosX;
         p.y += parent->m_PosY;
     {
         p.x += parent->m_PosX;
         p.y += parent->m_PosY;


@@ -201,6 +290,14 @@ wxPoint wxHtmlCell::GetAbsPos() const
     return p;
 }
 
     return p;
 }
 

+wxHtmlCell *wxHtmlCell::GetRootCell() const
+{
+    wxHtmlCell *c = wxConstCast(this, wxHtmlCell);
+    while ( c->m_Parent )
+        c = c->m_Parent;
+    return c;
+}
+

 unsigned wxHtmlCell::GetDepth() const
 {
     unsigned d = 0;
 unsigned wxHtmlCell::GetDepth() const
 {
     unsigned d = 0;


@@ -256,10 +353,14 @@ bool wxHtmlCell::IsBefore(wxHtmlCell *cell) const
 
 IMPLEMENT_ABSTRACT_CLASS(wxHtmlWordCell, wxHtmlCell)
 
 
 IMPLEMENT_ABSTRACT_CLASS(wxHtmlWordCell, wxHtmlCell)
 

-wxHtmlWordCell::wxHtmlWordCell(const wxString& word, wxDC& dc) : wxHtmlCell()
+wxHtmlWordCell::wxHtmlWordCell(const wxString& word, const wxDC& dc) : wxHtmlCell()

 {
     m_Word = word;
 {
     m_Word = word;

-    dc.GetTextExtent(m_Word, &m_Width, &m_Height, &m_Descent);
+    wxCoord w, h, d;
+    dc.GetTextExtent(m_Word, &w, &h, &d);
+    m_Width = w;
+    m_Height = h;
+    m_Descent = d;

     SetCanLiveOnPagebreak(false);
     m_allowLinebreak = true;
 }
     SetCanLiveOnPagebreak(false);
     m_allowLinebreak = true;
 }


@@ -276,16 +377,15 @@ void wxHtmlWordCell::SetPreviousWord(wxHtmlWordCell *cell)
 // Splits m_Word into up to three parts according to selection, returns
 // substring before, in and after selection and the points (in relative coords)
 // where s2 and s3 start:
 // Splits m_Word into up to three parts according to selection, returns
 // substring before, in and after selection and the points (in relative coords)
 // where s2 and s3 start:

-void wxHtmlWordCell::Split(wxDC& dc,
+void wxHtmlWordCell::Split(const wxDC& dc,

                            const wxPoint& selFrom, const wxPoint& selTo,
                            unsigned& pos1, unsigned& pos2) const
 {
     wxPoint pt1 = (selFrom == wxDefaultPosition) ?
                    wxDefaultPosition : selFrom - GetAbsPos();
     wxPoint pt2 = (selTo == wxDefaultPosition) ?
                            const wxPoint& selFrom, const wxPoint& selTo,
                            unsigned& pos1, unsigned& pos2) const
 {
     wxPoint pt1 = (selFrom == wxDefaultPosition) ?
                    wxDefaultPosition : selFrom - GetAbsPos();
     wxPoint pt2 = (selTo == wxDefaultPosition) ?

-                   wxPoint(m_Width, wxDefaultPosition.y) : selTo - GetAbsPos();
+                   wxPoint(m_Width, wxDefaultCoord) : selTo - GetAbsPos();

 
 

-    wxCoord charW, charH;

     unsigned len = m_Word.length();
     unsigned i = 0;
     pos1 = 0;
     unsigned len = m_Word.length();
     unsigned i = 0;
     pos1 = 0;


@@ -298,6 +398,14 @@ void wxHtmlWordCell::Split(wxDC& dc,
         pt2.x = m_Width;
 
     // before selection:
         pt2.x = m_Width;
 
     // before selection:

+#ifdef __WXMAC__
+    // implementation using PartialExtents to support fractional widths
+    wxArrayInt widths ;
+    dc.GetPartialTextExtents(m_Word,widths) ;
+    while( i < len && pt1.x >= widths[i] )
+        i++ ;
+#else // __WXMAC__
+    wxCoord charW, charH;

     while ( pt1.x > 0 && i < len )
     {
         dc.GetTextExtent(m_Word[i], &charW, &charH);
     while ( pt1.x > 0 && i < len )
     {
         dc.GetTextExtent(m_Word[i], &charW, &charH);


@@ -308,9 +416,14 @@ void wxHtmlWordCell::Split(wxDC& dc,
             i++;
         }
     }
             i++;
         }
     }

+#endif // __WXMAC__/!__WXMAC__

 
     // in selection:
     unsigned j = i;
 
     // in selection:
     unsigned j = i;

+#ifdef __WXMAC__
+    while( j < len && pt2.x >= widths[j] )
+        j++ ;
+#else // __WXMAC__

     pos2 = pos1;
     pt2.x -= pos2;
     while ( pt2.x > 0 && j < len )
     pos2 = pos1;
     pt2.x -= pos2;
     while ( pt2.x > 0 && j < len )


@@ -323,12 +436,13 @@ void wxHtmlWordCell::Split(wxDC& dc,
             j++;
         }
     }
             j++;
         }
     }

+#endif // __WXMAC__/!__WXMAC__

 
     pos1 = i;
     pos2 = j;
 }
 
 
     pos1 = i;
     pos2 = j;
 }
 

-void wxHtmlWordCell::SetSelectionPrivPos(wxDC& dc, wxHtmlSelection *s) const
+void wxHtmlWordCell::SetSelectionPrivPos(const wxDC& dc, wxHtmlSelection *s) const

 {
     unsigned p1, p2;
 
 {
     unsigned p1, p2;
 


@@ -385,7 +499,7 @@ void wxHtmlWordCell::Draw(wxDC& dc, int x, int y,
 #endif
 
     bool drawSelectionAfterCell = false;
 #endif
 
     bool drawSelectionAfterCell = false;

-    
+

     if ( info.GetState().GetSelectionState() == wxHTML_SEL_CHANGING )
     {
         // Selection changing, we must draw the word piecewise:
     if ( info.GetState().GetSelectionState() == wxHTML_SEL_CHANGING )
     {
         // Selection changing, we must draw the word piecewise:


@@ -506,16 +620,16 @@ wxString wxHtmlWordCell::ConvertToText(wxHtmlSelection *s) const
     return m_Word;
 }
 
     return m_Word;
 }
 

-wxCursor wxHtmlWordCell::GetCursor() const
+wxCursor wxHtmlWordCell::GetMouseCursor(wxHtmlWindowInterface *window) const

 {
     if ( !GetLink() )
     {
 {
     if ( !GetLink() )
     {

-        if ( !gs_cursorText )
-            gs_cursorText = new wxCursor(wxCURSOR_IBEAM);
-        return *gs_cursorText;
+        return window->GetHTMLCursor(wxHtmlWindowInterface::HTMLCursor_Text);

     }
     else
     }
     else

-        return wxHtmlCell::GetCursor();
+    {
+        return wxHtmlCell::GetMouseCursor(window);
+    }

 }
 
 
 }
 
 


@@ -591,32 +705,28 @@ int wxHtmlContainerCell::GetIndentUnits(int ind) const
 }
 
 
 }
 
 

-
-bool wxHtmlContainerCell::AdjustPagebreak(int *pagebreak, int* known_pagebreaks, int number_of_pages) const
+bool wxHtmlContainerCell::AdjustPagebreak(int *pagebreak,
+                                          wxArrayInt& known_pagebreaks) const

 {
     if (!m_CanLiveOnPagebreak)
 {
     if (!m_CanLiveOnPagebreak)

-        return wxHtmlCell::AdjustPagebreak(pagebreak, known_pagebreaks, number_of_pages);
+        return wxHtmlCell::AdjustPagebreak(pagebreak, known_pagebreaks);

 
 

-    else
-    {
-        wxHtmlCell *c = GetFirstChild();
-        bool rt = false;
-        int pbrk = *pagebreak - m_PosY;
+    wxHtmlCell *c = GetFirstChild();
+    bool rt = false;
+    int pbrk = *pagebreak - m_PosY;

 
 

-        while (c)
-        {
-            if (c->AdjustPagebreak(&pbrk, known_pagebreaks, number_of_pages))
-                rt = true;
-            c = c->GetNext();
-        }
-        if (rt)
-            *pagebreak = pbrk + m_PosY;
-        return rt;
+    while (c)
+    {
+        if (c->AdjustPagebreak(&pbrk, known_pagebreaks))
+            rt = true;
+        c = c->GetNext();

     }
     }

+    if (rt)
+        *pagebreak = pbrk + m_PosY;
+    return rt;

 }
 
 
 }
 
 

-

 void wxHtmlContainerCell::Layout(int w)
 {
     wxHtmlCell::Layout(w);
 void wxHtmlContainerCell::Layout(int w)
 {
     wxHtmlCell::Layout(w);


@@ -637,8 +747,6 @@ void wxHtmlContainerCell::Layout(int w)
        return;
     }
 
        return;
     }
 

-    wxHtmlCell *cell = m_Cells,
-               *line = m_Cells;

     wxHtmlCell *nextCell;
     long xpos = 0, ypos = m_IndentTop;
     int xdelta = 0, ybasicpos = 0, ydiff;
     wxHtmlCell *nextCell;
     long xpos = 0, ypos = m_IndentTop;
     int xdelta = 0, ybasicpos = 0, ydiff;


@@ -685,6 +793,8 @@ void wxHtmlContainerCell::Layout(int w)
     s_width = m_Width - s_indent - ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
 
     // my own layouting:
     s_width = m_Width - s_indent - ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
 
     // my own layouting:

+    wxHtmlCell *cell = m_Cells,
+               *line = m_Cells;

     while (cell != NULL)
     {
         switch (m_AlignVer)
     while (cell != NULL)
     {
         switch (m_AlignVer)


@@ -716,7 +826,7 @@ void wxHtmlContainerCell::Layout(int w)
             curLineWidth += cell->GetMaxTotalWidth();
 
         cell = cell->GetNext();
             curLineWidth += cell->GetMaxTotalWidth();
 
         cell = cell->GetNext();

-            
+

         // compute length of the next word that would be added:
         nextWordWidth = 0;
         if (cell)
         // compute length of the next word that would be added:
         nextWordWidth = 0;
         if (cell)


@@ -728,9 +838,9 @@ void wxHtmlContainerCell::Layout(int w)
                 nextCell = nextCell->GetNext();
             } while (nextCell && !nextCell->IsLinebreakAllowed());
         }
                 nextCell = nextCell->GetNext();
             } while (nextCell && !nextCell->IsLinebreakAllowed());
         }

-        
-        // force new line if occured:
-        if ((cell == NULL) || 
+
+        // force new line if occurred:
+        if ((cell == NULL) ||

             (xpos + nextWordWidth > s_width && cell->IsLinebreakAllowed()))
         {
             if (xpos > MaxLineWidth) MaxLineWidth = xpos;
             (xpos + nextWordWidth > s_width && cell->IsLinebreakAllowed()))
         {
             if (xpos > MaxLineWidth) MaxLineWidth = xpos;


@@ -775,51 +885,65 @@ void wxHtmlContainerCell::Layout(int w)
                 // between two cells separated by, e.g. font change, cell which
                 // is wrong
 
                 // between two cells separated by, e.g. font change, cell which
                 // is wrong
 

-                const int step = s_width - xpos;
+                int step = s_width - xpos;

                 if ( step > 0 )
                 {
                     // first count the cells which will get extra space
                 if ( step > 0 )
                 {
                     // first count the cells which will get extra space

-                    int total = 0;
+                    int total = -1;

 
 

-                    const wxHtmlCell *c,
-                                     *prev = NULL,
-                                     *next = NULL;
-                    for ( c = line; c != cell; prev = c, c = next )
+                    const wxHtmlCell *c;
+                    if ( line != cell )

                     {
                     {

-                        next = c->GetNext();
-                        if ( c->IsLinebreakAllowed() &&
-                                (next == cell || next->IsLinebreakAllowed()) &&
-                                    (!prev || prev->IsLinebreakAllowed()) )
+                        for ( c = line; c != cell; c = c->GetNext() )

                         {
                         {

-                            total++;
+                            if ( c->IsLinebreakAllowed() )
+                            {
+                                total++;
+                            }

                         }
                     }
 
                     // and now extra space to those cells which merit it
                     if ( total )
                     {
                         }
                     }
 
                     // and now extra space to those cells which merit it
                     if ( total )
                     {

-                        prev =
-                        next = NULL;
-                        for ( int n = 0; line != cell; line = line->GetNext() )
+                        // first visible cell on line is not moved:
+                        while (line !=cell && !line->IsLinebreakAllowed())

                         {
                         {

-                            line->SetPos(line->GetPosX() + s_indent +
-                                           ((n * step) / total),
-                                           line->GetPosY() + ypos);
+                            line->SetPos(line->GetPosX() + s_indent,
+                                         line->GetPosY() + ypos);
+                            line = line->GetNext();
+                        }
+
+                        if (line != cell)
+                        {
+                            line->SetPos(line->GetPosX() + s_indent,
+                                         line->GetPosY() + ypos);
+
+                            line = line->GetNext();
+                        }

 
 

-                            next = line->GetNext();
-                            if ( line->IsLinebreakAllowed() &&
-                                    (next == cell ||
-                                        next->IsLinebreakAllowed()) &&
-                                        (!prev || prev->IsLinebreakAllowed()) )
+                        for ( int n = 0; line != cell; line = line->GetNext() )
+                        {
+                            if ( line->IsLinebreakAllowed() )

                             {
                                 // offset the next cell relative to this one
                                 // thus increasing our size
                                 n++;
                             }
                             {
                                 // offset the next cell relative to this one
                                 // thus increasing our size
                                 n++;
                             }

+
+                            line->SetPos(line->GetPosX() + s_indent +
+                                           ((n * step) / total),
+                                           line->GetPosY() + ypos);

                         }
                     }
                         }
                     }

+                    else
+                    {
+                        // this will cause the code to enter "else branch" below:
+                        step = 0;
+                    }

                 }
                 }

-                else // no extra space to distribute
+                // else branch:
+                if ( step <= 0 ) // no extra space to distribute

                 {
                     // just set the indent properly
                     while (line != cell)
                 {
                     // just set the indent properly
                     while (line != cell)


@@ -859,7 +983,7 @@ void wxHtmlContainerCell::Layout(int w)
 
     if (curLineWidth > m_MaxTotalWidth)
         m_MaxTotalWidth = curLineWidth;
 
     if (curLineWidth > m_MaxTotalWidth)
         m_MaxTotalWidth = curLineWidth;

-            
+

     m_MaxTotalWidth += s_indent + ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
     MaxLineWidth += s_indent + ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
     if (m_Width < MaxLineWidth) m_Width = MaxLineWidth;
     m_MaxTotalWidth += s_indent + ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
     MaxLineWidth += s_indent + ((m_IndentRight < 0) ? (-m_IndentRight * m_Width / 100) : m_IndentRight);
     if (m_Width < MaxLineWidth) m_Width = MaxLineWidth;


@@ -899,52 +1023,60 @@ void wxHtmlContainerCell::Draw(wxDC& dc, int x, int y, int view_y1, int view_y2,
     dc.SetPen(*wxRED_PEN);
     dc.DrawRectangle(x+m_PosX,y+m_PosY,m_Width,m_Height);
 #endif
     dc.SetPen(*wxRED_PEN);
     dc.DrawRectangle(x+m_PosX,y+m_PosY,m_Width,m_Height);
 #endif

-    // container visible, draw it:
-    if ((y + m_PosY <= view_y2) && (y + m_PosY + m_Height > view_y1))
+
+    int xlocal = x + m_PosX;
+    int ylocal = y + m_PosY;
+
+    if (m_UseBkColour)

     {
     {

-        if (m_UseBkColour)
-        {
-            wxBrush myb = wxBrush(m_BkColour, wxSOLID);
+        wxBrush myb = wxBrush(m_BkColour, wxSOLID);

 
 

-            int real_y1 = mMax(y + m_PosY, view_y1);
-            int real_y2 = mMin(y + m_PosY + m_Height - 1, view_y2);
+        int real_y1 = mMax(ylocal, view_y1);
+        int real_y2 = mMin(ylocal + m_Height - 1, view_y2);

 
 

-            dc.SetBrush(myb);
-            dc.SetPen(*wxTRANSPARENT_PEN);
-            dc.DrawRectangle(x + m_PosX, real_y1, m_Width, real_y2 - real_y1 + 1);
-        }
+        dc.SetBrush(myb);
+        dc.SetPen(*wxTRANSPARENT_PEN);
+        dc.DrawRectangle(xlocal, real_y1, m_Width, real_y2 - real_y1 + 1);
+    }

 
 

-        if (m_UseBorder)
-        {
-            wxPen mypen1(m_BorderColour1, 1, wxSOLID);
-            wxPen mypen2(m_BorderColour2, 1, wxSOLID);
-
-            dc.SetPen(mypen1);
-            dc.DrawLine(x + m_PosX, y + m_PosY, x + m_PosX, y + m_PosY + m_Height - 1);
-            dc.DrawLine(x + m_PosX, y + m_PosY, x + m_PosX + m_Width, y + m_PosY);
-            dc.SetPen(mypen2);
-            dc.DrawLine(x + m_PosX + m_Width - 1, y + m_PosY, x + m_PosX +  m_Width - 1, y + m_PosY + m_Height - 1);
-            dc.DrawLine(x + m_PosX, y + m_PosY + m_Height - 1, x + m_PosX + m_Width, y + m_PosY + m_Height - 1);
-        }
+    if (m_UseBorder)
+    {
+        wxPen mypen1(m_BorderColour1, 1, wxSOLID);
+        wxPen mypen2(m_BorderColour2, 1, wxSOLID);
+
+        dc.SetPen(mypen1);
+        dc.DrawLine(xlocal, ylocal, xlocal, ylocal + m_Height - 1);
+        dc.DrawLine(xlocal, ylocal, xlocal + m_Width, ylocal);
+        dc.SetPen(mypen2);
+        dc.DrawLine(xlocal + m_Width - 1, ylocal, xlocal +  m_Width - 1, ylocal + m_Height - 1);
+        dc.DrawLine(xlocal, ylocal + m_Height - 1, xlocal + m_Width, ylocal + m_Height - 1);
+    }

 
 

-        if (m_Cells)
+    if (m_Cells)
+    {
+        // draw container's contents:
+        for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())

         {
         {

-            // draw container's contents:
-            for (wxHtmlCell *cell = m_Cells; cell; cell = cell->GetNext())
+
+            // optimize drawing: don't render off-screen content:
+            if ((ylocal + cell->GetPosY() <= view_y2) &&
+                (ylocal + cell->GetPosY() + cell->GetHeight() > view_y1))

             {
             {

+                // the cell is visible, draw it:

                 UpdateRenderingStatePre(info, cell);
                 cell->Draw(dc,
                 UpdateRenderingStatePre(info, cell);
                 cell->Draw(dc,

-                           x + m_PosX, y + m_PosY, view_y1, view_y2,
+                           xlocal, ylocal, view_y1, view_y2,

                            info);
                 UpdateRenderingStatePost(info, cell);
             }
                            info);
                 UpdateRenderingStatePost(info, cell);
             }

+            else
+            {
+                // the cell is off-screen, proceed with font+color+etc.
+                // changes only:
+                cell->DrawInvisible(dc, xlocal, ylocal, info);
+            }

         }
     }
         }
     }

-    // container invisible, just proceed font+color changing:
-    else
-    {
-        DrawInvisible(dc, x, y, info);
-    }

 }
 
 
 }
 
 


@@ -1028,7 +1160,7 @@ void wxHtmlContainerCell::SetWidthFloat(const wxHtmlTag& tag, double pixel_scale
         int wdi;
         wxString wd = tag.GetParam(wxT("WIDTH"));
 
         int wdi;
         wxString wd = tag.GetParam(wxT("WIDTH"));
 

-        if (wd[wd.Length()-1] == wxT('%'))
+        if (wd[wd.length()-1] == wxT('%'))

         {
             wxSscanf(wd.c_str(), wxT("%i%%"), &wdi);
             SetWidthFloat(wdi, wxHTML_UNITS_PERCENT);
         {
             wxSscanf(wd.c_str(), wxT("%i%%"), &wdi);
             SetWidthFloat(wdi, wxHTML_UNITS_PERCENT);


@@ -1083,10 +1215,10 @@ wxHtmlCell *wxHtmlContainerCell::FindCellByPos(wxCoord x, wxCoord y,
             if ( cell->IsFormattingCell() )
                 continue;
             int cellY = cell->GetPosY();
             if ( cell->IsFormattingCell() )
                 continue;
             int cellY = cell->GetPosY();

-            if (!( y < cellY || (y < cellY + cell->GetHeight() && 
+            if (!( y < cellY || (y < cellY + cell->GetHeight() &&

                                  x < cell->GetPosX() + cell->GetWidth()) ))
                 continue;
                                  x < cell->GetPosX() + cell->GetWidth()) ))
                 continue;

-            
+

             c = cell->FindCellByPos(x - cell->GetPosX(), y - cellY, flags);
             if (c) return c;
         }
             c = cell->FindCellByPos(x - cell->GetPosX(), y - cellY, flags);
             if (c) return c;
         }


@@ -1113,13 +1245,34 @@ wxHtmlCell *wxHtmlContainerCell::FindCellByPos(wxCoord x, wxCoord y,
 }
 
 
 }
 
 

-void wxHtmlContainerCell::OnMouseClick(wxWindow *parent, int x, int y, const wxMouseEvent& event)
+bool wxHtmlContainerCell::ProcessMouseClick(wxHtmlWindowInterface *window,
+                                            const wxPoint& pos,
+                                            const wxMouseEvent& event)

 {
 {

-    wxHtmlCell *cell = FindCellByPos(x, y);
-    if ( cell )
-        cell->OnMouseClick(parent, x, y, event);
+#if WXWIN_COMPATIBILITY_2_6
+    wxHtmlCellOnMouseClickCompatHelper compat(window, pos, event);
+    return compat.CallOnMouseClick(this);

 }
 
 }
 

+void wxHtmlContainerCell::OnMouseClick(wxWindow*,
+                                       int, int, const wxMouseEvent& event)
+{
+    wxCHECK_RET( gs_helperOnMouseClick, _T("unexpected call to OnMouseClick") );
+    wxHtmlWindowInterface *window = gs_helperOnMouseClick->window;
+    const wxPoint& pos = gs_helperOnMouseClick->pos;
+#endif // WXWIN_COMPATIBILITY_2_6
+
+    bool retval = false;
+    wxHtmlCell *cell = FindCellByPos(pos.x, pos.y);
+    if ( cell )
+        retval = cell->ProcessMouseClick(window, pos, event);
+
+#if WXWIN_COMPATIBILITY_2_6
+    gs_helperOnMouseClick->retval = retval;
+#else
+    return retval;
+#endif // WXWIN_COMPATIBILITY_2_6
+}

 
 
 wxHtmlCell *wxHtmlContainerCell::GetFirstTerminal() const
 
 
 wxHtmlCell *wxHtmlContainerCell::GetFirstTerminal() const


@@ -1172,7 +1325,7 @@ static bool IsEmptyContainer(wxHtmlContainerCell *cell)
 }
 
 void wxHtmlContainerCell::RemoveExtraSpacing(bool top, bool bottom)
 }
 
 void wxHtmlContainerCell::RemoveExtraSpacing(bool top, bool bottom)

-{   
+{

     if ( top )
         SetIndent(0, wxHTML_INDENT_TOP);
     if ( bottom )
     if ( top )
         SetIndent(0, wxHTML_INDENT_TOP);
     if ( bottom )


@@ -1206,13 +1359,13 @@ void wxHtmlContainerCell::RemoveExtraSpacing(bool top, bool bottom)
                 }
             }
         }
                 }
             }
         }

-        
+

         if ( bottom )
         {
             wxArrayPtrVoid arr;
             for ( c = m_Cells; c; c = c->GetNext() )
                 arr.Add((void*)c);
         if ( bottom )
         {
             wxArrayPtrVoid arr;
             for ( c = m_Cells; c; c = c->GetNext() )
                 arr.Add((void*)c);

-           
+

             for ( int i = arr.GetCount() - 1; i >= 0; i--)
             {
                 c = (wxHtmlCell*)arr[i];
             for ( int i = arr.GetCount() - 1; i >= 0; i--)
             {
                 c = (wxHtmlCell*)arr[i];


@@ -1226,7 +1379,8 @@ void wxHtmlContainerCell::RemoveExtraSpacing(bool top, bool bottom)
                     cont = (wxHtmlContainerCell*)c;
                     if ( IsEmptyContainer(cont) )
                     {
                     cont = (wxHtmlContainerCell*)c;
                     if ( IsEmptyContainer(cont) )
                     {

-                        cont->SetIndent(0, wxHTML_INDENT_VERTICAL);                                 }
+                        cont->SetIndent(0, wxHTML_INDENT_VERTICAL);
+                    }

                     else
                     {
                         cont->RemoveExtraSpacing(false, true);
                     else
                     {
                         cont->RemoveExtraSpacing(false, true);


@@ -1424,29 +1578,4 @@ const wxHtmlCell* wxHtmlTerminalCellsInterator::operator++()
     return m_pos;
 }
 
     return m_pos;
 }
 

-
-
-
-
-
-
-//-----------------------------------------------------------------------------
-// Cleanup
-//-----------------------------------------------------------------------------
-
-class wxHtmlCellModule: public wxModule
-{
-DECLARE_DYNAMIC_CLASS(wxHtmlCellModule)
-public:
-    wxHtmlCellModule() : wxModule() {}
-    bool OnInit() { return true; }
-    void OnExit()
-    {
-        wxDELETE(gs_cursorLink);
-        wxDELETE(gs_cursorText);
-    }
-};
-
-IMPLEMENT_DYNAMIC_CLASS(wxHtmlCellModule, wxModule)
-

 #endif
 #endif