wxDC scaling fix patch (Derry Bryson)

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

/////////////////////////////////////////////////////////////////////////////
// Name:        helpdata.cpp
// Purpose:     wxHtmlHelpData
// Notes:       Based on htmlhelp.cpp, implementing a monolithic
//              HTML Help controller class,  by Vaclav Slavik
// Author:      Harm van der Heijden and Vaclav Slavik
// RCS-ID:      $Id$
// Copyright:   (c) Harm van der Heijden and Vaclav Slavik
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#include "wx/defs.h"

#if wxUSE_HTML && wxUSE_STREAMS

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

#include "wx/html/helpdata.h"
#include "wx/tokenzr.h"
#include "wx/wfstream.h"
#include "wx/busyinfo.h"
#include "wx/encconv.h"
#include "wx/fontmap.h"
#include "wx/log.h"
#include "wx/html/htmlpars.h"
#include "wx/html/htmldefs.h"

#include "wx/arrimpl.cpp"
WX_DEFINE_OBJARRAY(wxHtmlBookRecArray)

//-----------------------------------------------------------------------------
// static helper functions
//-----------------------------------------------------------------------------

// Reads one line, stores it into buf and returns pointer to new line or NULL.
static char* ReadLine(char *line, char *buf)
{
    char *writeptr = buf, *readptr = line;

    while (*readptr != 0 && *readptr != '\r' && *readptr != '\n') *(writeptr++) = *(readptr++);
    *writeptr = 0;
    while (*readptr == '\r' || *readptr == '\n') readptr++;
    if (*readptr == 0) return NULL;
    else return readptr;
}



static int LINKAGEMODE IndexCompareFunc(const void *a, const void *b)
{
    return wxStrcmp(((wxHtmlContentsItem*)a)->m_Name, ((wxHtmlContentsItem*)b)->m_Name);
}


//-----------------------------------------------------------------------------
// HP_Parser
//-----------------------------------------------------------------------------

class HP_Parser : public wxHtmlParser
{
    public:
        void AddText(const char* WXUNUSED(text)) { }
        wxObject* GetProduct() { return NULL; }
};


//-----------------------------------------------------------------------------
// HP_TagHandler
//-----------------------------------------------------------------------------

class HP_TagHandler : public wxHtmlTagHandler
{
    private:
        wxString m_Name, m_Page;
        int m_Level;
        int m_ID;
        int m_Index;
        wxHtmlContentsItem *m_Items;
        int m_ItemsCnt;
        wxHtmlBookRecord *m_Book;

    public:
        HP_TagHandler(wxHtmlBookRecord *b) : wxHtmlTagHandler() 
	        { m_Book = b; m_Items = NULL; m_ItemsCnt = 0; m_Name = m_Page = wxEmptyString; 
		      m_Level = 0; m_ID = -1; }
        wxString GetSupportedTags() { return wxT("UL,OBJECT,PARAM"); }
        bool HandleTag(const wxHtmlTag& tag);
        void WriteOut(wxHtmlContentsItem*& array, int& size);
        void ReadIn(wxHtmlContentsItem* array, int size);
};


bool HP_TagHandler::HandleTag(const wxHtmlTag& tag)
{
    if (tag.GetName() == wxT("UL")) 
    {
        m_Level++;
        ParseInner(tag);
        m_Level--;
        return TRUE;
    }
    else if (tag.GetName() == wxT("OBJECT")) 
    {
        m_Name = m_Page = wxEmptyString;
        ParseInner(tag);

        if (!m_Page.IsEmpty())
        /* should be 'if (tag.GetParam("TYPE") == "text/sitemap")'
           but this works fine. Valid HHW's file may contain only two
           object tags:
           
           <OBJECT type="text/site properties">
               <param name="ImageType" value="Folder">
           </OBJECT>
           
           or
           
	       <OBJECT type="text/sitemap">
		       <param name="Name" value="main page">
		       <param name="Local" value="another.htm">
		   </OBJECT>
           
           We're interested in the latter. !m_Page.IsEmpty() is valid
           condition because text/site properties does not contain Local param
        */
        {
            if (m_ItemsCnt % wxHTML_REALLOC_STEP == 0)
                m_Items = (wxHtmlContentsItem*) realloc(m_Items, (m_ItemsCnt + wxHTML_REALLOC_STEP) * sizeof(wxHtmlContentsItem));
            m_Items[m_ItemsCnt].m_Level = m_Level;
            m_Items[m_ItemsCnt].m_ID = m_ID;
            m_Items[m_ItemsCnt].m_Page = new wxChar[m_Page.Length() + 1];
            wxStrcpy(m_Items[m_ItemsCnt].m_Page, m_Page.c_str());
            m_Items[m_ItemsCnt].m_Name = new wxChar [m_Name.Length() + 1];
            wxStrcpy(m_Items[m_ItemsCnt].m_Name, m_Name.c_str());
            m_Items[m_ItemsCnt].m_Book = m_Book;
            m_ItemsCnt++;
        }

        return TRUE;
    }
    else 
    { // "PARAM"
        if (m_Name == wxEmptyString && tag.GetParam(wxT("NAME")) == wxT("Name")) 
        {
            m_Name = tag.GetParam(wxT("VALUE"));
            if (m_Name.Find(wxT('&')) != -1) 
            {
        #define ESCSEQ(escape, subst)  \
                          { _T("&") _T(escape) _T(";"), _T("&") _T(escape) _T(" "), _T(subst) } 
                static wxChar* substitutions[][3] = 
                        {
                        ESCSEQ("quot", "\""),
                        ESCSEQ("lt", "<"),
                        ESCSEQ("gt", ">"),

                        ESCSEQ("nbsp", " "),
                        ESCSEQ("iexcl", "!"),