Highly experimental, unstable code (for determining the

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

/////////////////////////////////////////////////////////////////////////////
// Name:        htmlcell.cpp
// Purpose:     wxHtmlCell - basic element of HTML output
// Author:      Vaclav Slavik
// RCS-ID:      $Id$
// Copyright:   (c) 1999 Vaclav Slavik
// Licence:     wxWindows Licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation
#endif

#include "wx/wxprec.h"

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

#ifdef __BORDLANDC__
#pragma hdrstop
#endif

#ifndef WXPRECOMP
#include "wx/wx.h"
#endif

#include "wx/html/htmlcell.h"
#include "wx/html/htmlwin.h"
#include <stdlib.h>


//-----------------------------------------------------------------------------
// wxHtmlCell
//-----------------------------------------------------------------------------

wxHtmlCell::wxHtmlCell() : wxObject() 
{
    m_Next = NULL; 
    m_Parent = NULL; 
    m_Width = m_Height = m_Descent = 0; 
    m_CanLiveOnPagebreak = TRUE;
    m_Link = NULL;
}

wxHtmlCell::~wxHtmlCell() 
{
    if (m_Link) delete m_Link; 
    if (m_Next) delete m_Next;
}


void wxHtmlCell::OnMouseClick(wxWindow *parent, int x, int y, 
                              const wxMouseEvent& event)
{
    wxHtmlLinkInfo *lnk = GetLink(x, y);
    if (lnk != NULL)
    {
        wxHtmlLinkInfo lnk2(*lnk);
        lnk2.SetEvent(&event);
        lnk2.SetHtmlCell(this);
        ((wxHtmlWindow*)parent) -> OnLinkClicked(lnk2);
        // note : this overcasting is legal because parent is *always* wxHtmlWindow
    }
}



bool wxHtmlCell::AdjustPagebreak(int *pagebreak) const
{
    if ((!m_CanLiveOnPagebreak) && 
                m_PosY < *pagebreak && m_PosY + m_Height > *pagebreak) {
        *pagebreak = m_PosY;
        if (m_Next != NULL) m_Next -> AdjustPagebreak(pagebreak);
        return TRUE;
    }
    
    else {
        if (m_Next != NULL) return m_Next -> AdjustPagebreak(pagebreak);
        else return FALSE;
    }
}



void wxHtmlCell::SetLink(const wxHtmlLinkInfo& link) 
{
    if (m_Link) delete m_Link;
    m_Link = NULL;
    if (link.GetHref() != wxEmptyString)
        m_Link = new wxHtmlLinkInfo(link);
}



void wxHtmlCell::Layout(int w) 
{
    SetPos(0, 0); 
    if (m_Next) m_Next -> Layout(w);
}


void wxHtmlCell::Draw(wxDC& dc, int x, int y, int view_y1, int view_y2) 
{
    if (m_Next) m_Next -> Draw(dc, x, y, view_y1, view_y2);
}



void wxHtmlCell::DrawInvisible(wxDC& dc, int x, int y) 
{
    if (m_Next) m_Next -> DrawInvisible(dc, x, y);
}



const wxHtmlCell* wxHtmlCell::Find(int condition, const void* param) const 
{
    if (m_Next) return m_Next -> Find(condition, param); 
    else return NULL;
}



//-----------------------------------------------------------------------------
// wxHtmlWordCell
//-----------------------------------------------------------------------------

wxHtmlWordCell::wxHtmlWordCell(const wxString& word, wxDC& dc) : wxHtmlCell()
{
    m_Word = word;
    
    if (m_Word.Find(wxT('&')) != -1) 
    {
#define ESCSEQ(escape, subst)  \
                  { wxT("&"escape";"), wxT("&"escape" "), wxT(subst) } 
        static wxChar* substitutions[][3] = 
                {
                ESCSEQ("quot", "\""),
                ESCSEQ("lt", "<"),
                ESCSEQ("gt", ">"),
    
                ESCSEQ("nbsp", " "),
                ESCSEQ("iexcl", "!"),