src/html/htmltag.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        htmltag.cpp
// Purpose:     wxHtmlTag class (represents single tag)
// Author:      Vaclav Slavik
// RCS-ID:      $Id$
// Copyright:   (c) 1999 Vaclav Slavik
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#include "wx/wxprec.h"

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

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#ifndef WXPRECOMP
#endif

#include "wx/html/htmltag.h"
#include "wx/html/htmlpars.h"
#include "wx/colour.h"
#include <stdio.h> // for vsscanf
#include <stdarg.h>


//-----------------------------------------------------------------------------
// wxHtmlTagsCache
//-----------------------------------------------------------------------------

struct wxHtmlCacheItem
{
    // this is "pos" value passed to wxHtmlTag's constructor.
    // it is position of '<' character of the tag
    int Key;

    // end positions for the tag:
    // end1 is '<' of ending tag,
    // end2 is '>' or both are
    // -1 if there is no ending tag for this one...
    // or -2 if this is ending tag  </...>
    int End1, End2;

    // name of this tag
    wxChar *Name;
};


IMPLEMENT_CLASS(wxHtmlTagsCache,wxObject)

#define CACHE_INCREMENT  64

bool wxIsCDATAElement(const wxChar *tag)
{
    return (wxStrcmp(tag, _T("SCRIPT")) == 0) ||
           (wxStrcmp(tag, _T("STYLE")) == 0);
}

wxHtmlTagsCache::wxHtmlTagsCache(const wxString& source)
{
    const wxChar *src = source.c_str();
    int lng = source.Length();
    wxChar tagBuffer[256];

    m_Cache = NULL;
    m_CacheSize = 0;
    m_CachePos = 0;

    int pos = 0;
    while (pos < lng)
    {
        if (src[pos] == wxT('<'))   // tag found:
        {
            if (m_CacheSize % CACHE_INCREMENT == 0)
                m_Cache = (wxHtmlCacheItem*) realloc(m_Cache, (m_CacheSize + CACHE_INCREMENT) * sizeof(wxHtmlCacheItem));
            int tg = m_CacheSize++;
            int stpos = pos++;
            m_Cache[tg].Key = stpos;

            int i;
            for ( i = 0;
                  pos < lng && i < (int)WXSIZEOF(tagBuffer) - 1 &&
                  src[pos] != wxT('>') && !wxIsspace(src[pos]);
                  i++, pos++ )
            {
                tagBuffer[i] = (wxChar)wxToupper(src[pos]);
            }
            tagBuffer[i] = _T('\0');

            m_Cache[tg].Name = new wxChar[i+1];
            memcpy(m_Cache[tg].Name, tagBuffer, (i+1)*sizeof(wxChar));

            while (pos < lng && src[pos] != wxT('>')) pos++;

            if (src[stpos+1] == wxT('/')) // ending tag:
            {
                m_Cache[tg].End1 = m_Cache[tg].End2 = -2;
                // find matching begin tag:
                for (i = tg; i >= 0; i--)
                    if ((m_Cache[i].End1 == -1) && (wxStrcmp(m_Cache[i].Name, tagBuffer+1) == 0))
                    {
                        m_Cache[i].End1 = stpos;
                        m_Cache[i].End2 = pos + 1;
                        break;
                    }
            }
            else
            {
                m_Cache[tg].End1 = m_Cache[tg].End2 = -1;

                if (wxIsCDATAElement(tagBuffer))
                {
                    // store the orig pos in case we are missing the closing
                    // tag (see below)
                    wxInt32 old_pos = pos;
                    bool foundCloseTag = false;

                    // find next matching tag
                    int tag_len = wxStrlen(tagBuffer);
                    while (pos < lng)
                    {
                        // find the ending tag
                        while (pos + 1 < lng &&
                               (src[pos] != '<' || src[pos+1] != '/'))
                            ++pos;
                        if (src[pos] == '<')
                            ++pos;

                        // see if it matches
                        int match_pos = 0;
                        while (pos < lng && match_pos < tag_len && src[pos] != '>' && src[pos] != '<') {
                            // cast to wxChar needed to suppress warning in
                            // Unicode build
                            if ((wxChar)wxToupper(src[pos]) == tagBuffer[match_pos]) {
                                ++match_pos;
                            }
                            else if (src[pos] == wxT(' ') || src[pos] == wxT('\n') ||
                                src[pos] == wxT('\r') || src[pos] == wxT('\t')) {
                                // need to skip over these
                            }
                            else {
                                match_pos = 0;
                            }
                            ++pos;
                        }

                        // found a match
                        if (match_pos == tag_len)
                        {
                            pos = pos - tag_len - 3;
                            foundCloseTag = true;
                            break;
                        }
                        else // keep looking for the closing tag
                        {
                            ++pos;
                        }
                    }
                    if (!foundCloseTag)
                    {
                        // we didn't find closing tag; this means the markup
                        // is incorrect and the best thing we can do is to
                        // ignore the unclosed tag and continue parsing as if
                        // it didn't exist:
                        pos = old_pos;
                    }
                }
            }
        }

        pos++;
    }

    // ok, we're done, now we'll free .Name members of cache - we don't need it anymore:
    for (int i = 0; i < m_CacheSize; i++)
    {
        delete[] m_Cache[i].Name;
        m_Cache[i].Name = NULL;
    }
}

void wxHtmlTagsCache::QueryTag(int at, int* end1, int* end2)
{
    if (m_Cache == NULL) return;
    if (m_Cache[m_CachePos].Key != at)
    {
        int delta = (at < m_Cache[m_CachePos].Key) ? -1 : 1;
        do
        {
            if ( m_CachePos < 0 || m_CachePos == m_CacheSize )
            {
                // something is very wrong with HTML, give up by returning an
                // impossibly large value which is going to be ignored by the
                // caller
                *end1 =
                *end2 = INT_MAX;
                return;
            }

            m_CachePos += delta;
        }
        while (m_Cache[m_CachePos].Key != at);
    }
    *end1 = m_Cache[m_CachePos].End1;
    *end2 = m_Cache[m_CachePos].End2;
}


//-----------------------------------------------------------------------------
// wxHtmlTag
//-----------------------------------------------------------------------------

IMPLEMENT_CLASS(wxHtmlTag,wxObject)

wxHtmlTag::wxHtmlTag(wxHtmlTag *parent,
                     const wxString& source, int pos, int end_pos,
                     wxHtmlTagsCache *cache,
                     wxHtmlEntitiesParser *entParser) : wxObject()
{
    /* Setup DOM relations */

    m_Next = NULL;
    m_FirstChild = m_LastChild = NULL;
    m_Parent = parent;
    if (parent)
    {
        m_Prev = m_Parent->m_LastChild;
        if (m_Prev == NULL)
            m_Parent->m_FirstChild = this;
        else
            m_Prev->m_Next = this;
        m_Parent->m_LastChild = this;
    }
    else
        m_Prev = NULL;

    /* Find parameters and their values: */

    int i;
    wxChar c;

    // fill-in name, params and begin pos:
    i = pos+1;

    // find tag's name and convert it to uppercase:
    while ((i < end_pos) &&
           ((c = source[i++]) != wxT(' ') && c != wxT('\r') &&
             c != wxT('\n') && c != wxT('\t') &&
             c != wxT('>')))
    {
        if ((c >= wxT('a')) && (c <= wxT('z')))
            c -= (wxT('a') - wxT('A'));
        m_Name << c;
    }

    // if the tag has parameters, read them and "normalize" them,
    // i.e. convert to uppercase, replace whitespaces by spaces and
    // remove whitespaces around '=':
    if (source[i-1] != wxT('>'))
    {
        #define IS_WHITE(c) (c == wxT(' ') || c == wxT('\r') || \
                             c == wxT('\n') || c == wxT('\t'))
        wxString pname, pvalue;
        wxChar quote;
        enum
        {
            ST_BEFORE_NAME = 1,
            ST_NAME,
            ST_BEFORE_EQ,
            ST_BEFORE_VALUE,
            ST_VALUE
        } state;

        quote = 0;
        state = ST_BEFORE_NAME;
        while (i < end_pos)
        {
            c = source[i++];

            if (c == wxT('>') && !(state == ST_VALUE && quote != 0))
            {
                if (state == ST_BEFORE_EQ || state == ST_NAME)
                {
                    m_ParamNames.Add(pname);
                    m_ParamValues.Add(wxEmptyString);
                }
                else if (state == ST_VALUE && quote == 0)
                {
                    m_ParamNames.Add(pname);
                    if (entParser)
                        m_ParamValues.Add(entParser->Parse(pvalue));
                    else
                        m_ParamValues.Add(pvalue);
                }
                break;
            }
            switch (state)
            {
                case ST_BEFORE_NAME:
                    if (!IS_WHITE(c))
                    {
                        pname = c;
                        state = ST_NAME;
                    }
                    break;
                case ST_NAME:
                    if (IS_WHITE(c))
                        state = ST_BEFORE_EQ;
                    else if (c == wxT('='))
                        state = ST_BEFORE_VALUE;
                    else
                        pname << c;
                    break;
                case ST_BEFORE_EQ:
                    if (c == wxT('='))
                        state = ST_BEFORE_VALUE;
                    else if (!IS_WHITE(c))
                    {
                        m_ParamNames.Add(pname);
                        m_ParamValues.Add(wxEmptyString);
                        pname = c;
                        state = ST_NAME;
                    }
                    break;
                case ST_BEFORE_VALUE:
                    if (!IS_WHITE(c))
                    {
                        if (c == wxT('"') || c == wxT('\''))
                            quote = c, pvalue = wxEmptyString;
                        else
                            quote = 0, pvalue = c;
                        state = ST_VALUE;
                    }
                    break;
                case ST_VALUE:
                    if ((quote != 0 && c == quote) ||
                        (quote == 0 && IS_WHITE(c)))
                    {
                        m_ParamNames.Add(pname);
                        if (quote == 0)
                        {
                            // VS: backward compatibility, no real reason,
                            //     but wxHTML code relies on this... :(
                            pvalue.MakeUpper();
                        }
                        if (entParser)
                            m_ParamValues.Add(entParser->Parse(pvalue));
                        else
                            m_ParamValues.Add(pvalue);
                        state = ST_BEFORE_NAME;
                    }
                    else
                        pvalue << c;
                    break;
            }
        }

        #undef IS_WHITE
    }
    m_Begin = i;

    cache->QueryTag(pos, &m_End1, &m_End2);
    if (m_End1 > end_pos) m_End1 = end_pos;
    if (m_End2 > end_pos) m_End2 = end_pos;
}

wxHtmlTag::~wxHtmlTag()
{
    wxHtmlTag *t1, *t2;
    t1 = m_FirstChild;
    while (t1)
    {
        t2 = t1->GetNextSibling();
        delete t1;
        t1 = t2;
    }
}

bool wxHtmlTag::HasParam(const wxString& par) const
{
    return (m_ParamNames.Index(par, false) != wxNOT_FOUND);
}

wxString wxHtmlTag::GetParam(const wxString& par, bool with_commas) const
{
    int index = m_ParamNames.Index(par, false);
    if (index == wxNOT_FOUND)
        return wxEmptyString;
    if (with_commas)
    {
        // VS: backward compatibility, seems to be never used by wxHTML...
        wxString s;
        s << wxT('"') << m_ParamValues[index] << wxT('"');
        return s;
    }
    else
        return m_ParamValues[index];
}

int wxHtmlTag::ScanParam(const wxString& par,
                         const wxChar *format,
                         void *param) const
{
    wxString parval = GetParam(par);
    return wxSscanf(parval, format, param);
}

bool wxHtmlTag::GetParamAsColour(const wxString& par, wxColour *clr) const
{
    wxString str = GetParam(par);

    if (str.empty()) return false;
    if (str.GetChar(0) == wxT('#'))
    {
        unsigned long tmp;
        if (ScanParam(par, wxT("#%lX"), &tmp) != 1)
            return false;
        *clr = wxColour((unsigned char)((tmp & 0xFF0000) >> 16),
                        (unsigned char)((tmp & 0x00FF00) >> 8),
                        (unsigned char)(tmp & 0x0000FF));
        return true;
    }
    else
    {
        // Handle colours defined in HTML 4.0:
        #define HTML_COLOUR(name,r,g,b)                 \
            if (str.IsSameAs(wxT(name), false))         \
                { *clr = wxColour(r,g,b); return true; }
        HTML_COLOUR("black",   0x00,0x00,0x00)
        HTML_COLOUR("silver",  0xC0,0xC0,0xC0)
        HTML_COLOUR("gray",    0x80,0x80,0x80)
        HTML_COLOUR("white",   0xFF,0xFF,0xFF)
        HTML_COLOUR("maroon",  0x80,0x00,0x00)
        HTML_COLOUR("red",     0xFF,0x00,0x00)
        HTML_COLOUR("purple",  0x80,0x00,0x80)
        HTML_COLOUR("fuchsia", 0xFF,0x00,0xFF)
        HTML_COLOUR("green",   0x00,0x80,0x00)
        HTML_COLOUR("lime",    0x00,0xFF,0x00)
        HTML_COLOUR("olive",   0x80,0x80,0x00)
        HTML_COLOUR("yellow",  0xFF,0xFF,0x00)
        HTML_COLOUR("navy",    0x00,0x00,0x80)
        HTML_COLOUR("blue",    0x00,0x00,0xFF)
        HTML_COLOUR("teal",    0x00,0x80,0x80)
        HTML_COLOUR("aqua",    0x00,0xFF,0xFF)
        #undef HTML_COLOUR
    }

    return false;
}

bool wxHtmlTag::GetParamAsInt(const wxString& par, int *clr) const
{
    if (!HasParam(par)) return false;
    long i;
    bool succ = GetParam(par).ToLong(&i);
    *clr = (int)i;
    return succ;
}

wxString wxHtmlTag::GetAllParams() const
{
    // VS: this function is for backward compatibility only,
    //     never used by wxHTML
    wxString s;
    size_t cnt = m_ParamNames.GetCount();
    for (size_t i = 0; i < cnt; i++)
    {
        s << m_ParamNames[i];
        s << wxT('=');
        if (m_ParamValues[i].Find(wxT('"')) != wxNOT_FOUND)
            s << wxT('\'') << m_ParamValues[i] << wxT('\'');
        else
            s << wxT('"') << m_ParamValues[i] << wxT('"');
    }
    return s;
}

wxHtmlTag *wxHtmlTag::GetFirstSibling() const
{
    if (m_Parent)
        return m_Parent->m_FirstChild;
    else
    {
        wxHtmlTag *cur = (wxHtmlTag*)this;
        while (cur->m_Prev)
            cur = cur->m_Prev;
        return cur;
    }
}

wxHtmlTag *wxHtmlTag::GetLastSibling() const
{
    if (m_Parent)
        return m_Parent->m_LastChild;
    else
    {
        wxHtmlTag *cur = (wxHtmlTag*)this;
        while (cur->m_Next)
            cur = cur->m_Next;
        return cur;
    }
}

wxHtmlTag *wxHtmlTag::GetNextTag() const
{
    if (m_FirstChild) return m_FirstChild;
    if (m_Next) return m_Next;
    wxHtmlTag *cur = m_Parent;
    if (!cur) return NULL;
    while (cur->m_Parent && !cur->m_Next)
        cur = cur->m_Parent;
    return cur->m_Next;
}

#if WXWIN_COMPATIBILITY_2_2

bool wxHtmlTag::IsEnding() const
{
    return false;
}

#endif // WXWIN_COMPATIBILITY_2_2

#endif
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: htmltag.cpp
	3	// Purpose: wxHtmlTag class (represents single tag)
	4	// Author: Vaclav Slavik
	5	// RCS-ID: $Id$
	6	// Copyright: (c) 1999 Vaclav Slavik
	7	// Licence: wxWindows licence
	8	/////////////////////////////////////////////////////////////////////////////
	9
	10	#include "wx/wxprec.h"
	11
	12	#include "wx/defs.h"
	13	#if wxUSE_HTML
	14
	15	#ifdef __BORLANDC__
	16	#pragma hdrstop
	17	#endif
	18
	19	#ifndef WXPRECOMP
	20	#endif
	21
	22	#include "wx/html/htmltag.h"
	23	#include "wx/html/htmlpars.h"
	24	#include "wx/colour.h"
	25	#include <stdio.h> // for vsscanf
	26	#include <stdarg.h>
	27
	28
	29	//-----------------------------------------------------------------------------
	30	// wxHtmlTagsCache
	31	//-----------------------------------------------------------------------------
	32
	33	struct wxHtmlCacheItem
	34	{
	35	// this is "pos" value passed to wxHtmlTag's constructor.
	36	// it is position of '<' character of the tag
	37	int Key;
	38
	39	// end positions for the tag:
	40	// end1 is '<' of ending tag,
	41	// end2 is '>' or both are
	42	// -1 if there is no ending tag for this one...
	43	// or -2 if this is ending tag </...>
	44	int End1, End2;
	45
	46	// name of this tag
	47	wxChar *Name;
	48	};
	49
	50
	51	IMPLEMENT_CLASS(wxHtmlTagsCache,wxObject)
	52
	53	#define CACHE_INCREMENT 64
	54
	55	bool wxIsCDATAElement(const wxChar *tag)
	56	{
	57	return (wxStrcmp(tag, _T("SCRIPT")) == 0) \|\|
	58	(wxStrcmp(tag, _T("STYLE")) == 0);
	59	}
	60
	61	wxHtmlTagsCache::wxHtmlTagsCache(const wxString& source)
	62	{
	63	const wxChar *src = source.c_str();
	64	int lng = source.Length();
	65	wxChar tagBuffer[256];
	66
	67	m_Cache = NULL;
	68	m_CacheSize = 0;
	69	m_CachePos = 0;
	70
	71	int pos = 0;
	72	while (pos < lng)
	73	{
	74	if (src[pos] == wxT('<')) // tag found:
	75	{
	76	if (m_CacheSize % CACHE_INCREMENT == 0)
	77	m_Cache = (wxHtmlCacheItem) realloc(m_Cache, (m_CacheSize + CACHE_INCREMENT) sizeof(wxHtmlCacheItem));
	78	int tg = m_CacheSize++;
	79	int stpos = pos++;
	80	m_Cache[tg].Key = stpos;
	81
	82	int i;
	83	for ( i = 0;
	84	pos < lng && i < (int)WXSIZEOF(tagBuffer) - 1 &&
	85	src[pos] != wxT('>') && !wxIsspace(src[pos]);
	86	i++, pos++ )
	87	{
	88	tagBuffer[i] = (wxChar)wxToupper(src[pos]);
	89	}
	90	tagBuffer[i] = _T('\0');
	91
	92	m_Cache[tg].Name = new wxChar[i+1];
	93	memcpy(m_Cache[tg].Name, tagBuffer, (i+1)*sizeof(wxChar));
	94
	95	while (pos < lng && src[pos] != wxT('>')) pos++;
	96
	97	if (src[stpos+1] == wxT('/')) // ending tag:
	98	{
	99	m_Cache[tg].End1 = m_Cache[tg].End2 = -2;
	100	// find matching begin tag:
	101	for (i = tg; i >= 0; i--)
	102	if ((m_Cache[i].End1 == -1) && (wxStrcmp(m_Cache[i].Name, tagBuffer+1) == 0))
	103	{
	104	m_Cache[i].End1 = stpos;
	105	m_Cache[i].End2 = pos + 1;
	106	break;
	107	}
	108	}
	109	else
	110	{
	111	m_Cache[tg].End1 = m_Cache[tg].End2 = -1;
	112
	113	if (wxIsCDATAElement(tagBuffer))
	114	{
	115	// store the orig pos in case we are missing the closing
	116	// tag (see below)
	117	wxInt32 old_pos = pos;
	118	bool foundCloseTag = false;
	119
	120	// find next matching tag
	121	int tag_len = wxStrlen(tagBuffer);
	122	while (pos < lng)
	123	{
	124	// find the ending tag
	125	while (pos + 1 < lng &&
	126	(src[pos] != '<' \|\| src[pos+1] != '/'))
	127	++pos;
	128	if (src[pos] == '<')
	129	++pos;
	130
	131	// see if it matches
	132	int match_pos = 0;
	133	while (pos < lng && match_pos < tag_len && src[pos] != '>' && src[pos] != '<') {
	134	// cast to wxChar needed to suppress warning in
	135	// Unicode build
	136	if ((wxChar)wxToupper(src[pos]) == tagBuffer[match_pos]) {
	137	++match_pos;
	138	}
	139	else if (src[pos] == wxT(' ') \|\| src[pos] == wxT('\n') \|\|
	140	src[pos] == wxT('\r') \|\| src[pos] == wxT('\t')) {
	141	// need to skip over these
	142	}
	143	else {
	144	match_pos = 0;
	145	}
	146	++pos;
	147	}
	148
	149	// found a match
	150	if (match_pos == tag_len)
	151	{
	152	pos = pos - tag_len - 3;
	153	foundCloseTag = true;
	154	break;
	155	}
	156	else // keep looking for the closing tag
	157	{
	158	++pos;
	159	}
	160	}
	161	if (!foundCloseTag)
	162	{
	163	// we didn't find closing tag; this means the markup
	164	// is incorrect and the best thing we can do is to
	165	// ignore the unclosed tag and continue parsing as if
	166	// it didn't exist:
	167	pos = old_pos;
	168	}
	169	}
	170	}
	171	}
	172
	173	pos++;
	174	}
	175
	176	// ok, we're done, now we'll free .Name members of cache - we don't need it anymore:
	177	for (int i = 0; i < m_CacheSize; i++)
	178	{
	179	delete[] m_Cache[i].Name;
	180	m_Cache[i].Name = NULL;
	181	}
	182	}
	183
	184	void wxHtmlTagsCache::QueryTag(int at, int* end1, int* end2)
	185	{
	186	if (m_Cache == NULL) return;
	187	if (m_Cache[m_CachePos].Key != at)
	188	{
	189	int delta = (at < m_Cache[m_CachePos].Key) ? -1 : 1;
	190	do
	191	{
	192	if ( m_CachePos < 0 \|\| m_CachePos == m_CacheSize )
	193	{
	194	// something is very wrong with HTML, give up by returning an
	195	// impossibly large value which is going to be ignored by the
	196	// caller
	197	*end1 =
	198	*end2 = INT_MAX;
	199	return;
	200	}
	201
	202	m_CachePos += delta;
	203	}
	204	while (m_Cache[m_CachePos].Key != at);
	205	}
	206	*end1 = m_Cache[m_CachePos].End1;
	207	*end2 = m_Cache[m_CachePos].End2;
	208	}
	209
	210
	211
	212
	213	//-----------------------------------------------------------------------------
	214	// wxHtmlTag
	215	//-----------------------------------------------------------------------------
	216
	217	IMPLEMENT_CLASS(wxHtmlTag,wxObject)
	218
	219	wxHtmlTag::wxHtmlTag(wxHtmlTag *parent,
	220	const wxString& source, int pos, int end_pos,
	221	wxHtmlTagsCache *cache,
	222	wxHtmlEntitiesParser *entParser) : wxObject()
	223	{
	224	/* Setup DOM relations */
	225
	226	m_Next = NULL;
	227	m_FirstChild = m_LastChild = NULL;
	228	m_Parent = parent;
	229	if (parent)
	230	{
	231	m_Prev = m_Parent->m_LastChild;
	232	if (m_Prev == NULL)
	233	m_Parent->m_FirstChild = this;
	234	else
	235	m_Prev->m_Next = this;
	236	m_Parent->m_LastChild = this;
	237	}
	238	else
	239	m_Prev = NULL;
	240
	241	/* Find parameters and their values: */
	242
	243	int i;
	244	wxChar c;
	245
	246	// fill-in name, params and begin pos:
	247	i = pos+1;
	248
	249	// find tag's name and convert it to uppercase:
	250	while ((i < end_pos) &&
	251	((c = source[i++]) != wxT(' ') && c != wxT('\r') &&
	252	c != wxT('\n') && c != wxT('\t') &&
	253	c != wxT('>')))
	254	{
	255	if ((c >= wxT('a')) && (c <= wxT('z')))
	256	c -= (wxT('a') - wxT('A'));
	257	m_Name << c;
	258	}
	259
	260	// if the tag has parameters, read them and "normalize" them,
	261	// i.e. convert to uppercase, replace whitespaces by spaces and
	262	// remove whitespaces around '=':
	263	if (source[i-1] != wxT('>'))
	264	{
	265	#define IS_WHITE(c) (c == wxT(' ') \|\| c == wxT('\r') \|\| \
	266	c == wxT('\n') \|\| c == wxT('\t'))
	267	wxString pname, pvalue;
	268	wxChar quote;
	269	enum
	270	{
	271	ST_BEFORE_NAME = 1,
	272	ST_NAME,
	273	ST_BEFORE_EQ,
	274	ST_BEFORE_VALUE,
	275	ST_VALUE
	276	} state;
	277
	278	quote = 0;
	279	state = ST_BEFORE_NAME;
	280	while (i < end_pos)
	281	{
	282	c = source[i++];
	283
	284	if (c == wxT('>') && !(state == ST_VALUE && quote != 0))
	285	{
	286	if (state == ST_BEFORE_EQ \|\| state == ST_NAME)
	287	{
	288	m_ParamNames.Add(pname);
	289	m_ParamValues.Add(wxEmptyString);
	290	}
	291	else if (state == ST_VALUE && quote == 0)
	292	{
	293	m_ParamNames.Add(pname);
	294	if (entParser)
	295	m_ParamValues.Add(entParser->Parse(pvalue));
	296	else
	297	m_ParamValues.Add(pvalue);
	298	}
	299	break;
	300	}
	301	switch (state)
	302	{
	303	case ST_BEFORE_NAME:
	304	if (!IS_WHITE(c))
	305	{
	306	pname = c;
	307	state = ST_NAME;
	308	}
	309	break;
	310	case ST_NAME:
	311	if (IS_WHITE(c))
	312	state = ST_BEFORE_EQ;
	313	else if (c == wxT('='))
	314	state = ST_BEFORE_VALUE;
	315	else
	316	pname << c;
	317	break;
	318	case ST_BEFORE_EQ:
	319	if (c == wxT('='))
	320	state = ST_BEFORE_VALUE;
	321	else if (!IS_WHITE(c))
	322	{
	323	m_ParamNames.Add(pname);
	324	m_ParamValues.Add(wxEmptyString);
	325	pname = c;
	326	state = ST_NAME;
	327	}
	328	break;
	329	case ST_BEFORE_VALUE:
	330	if (!IS_WHITE(c))
	331	{
	332	if (c == wxT('"') \|\| c == wxT('\''))
	333	quote = c, pvalue = wxEmptyString;
	334	else
	335	quote = 0, pvalue = c;
	336	state = ST_VALUE;
	337	}
	338	break;
	339	case ST_VALUE:
	340	if ((quote != 0 && c == quote) \|\|
	341	(quote == 0 && IS_WHITE(c)))
	342	{
	343	m_ParamNames.Add(pname);
	344	if (quote == 0)
	345	{
	346	// VS: backward compatibility, no real reason,
	347	// but wxHTML code relies on this... :(
	348	pvalue.MakeUpper();
	349	}
	350	if (entParser)
	351	m_ParamValues.Add(entParser->Parse(pvalue));
	352	else
	353	m_ParamValues.Add(pvalue);
	354	state = ST_BEFORE_NAME;
	355	}
	356	else
	357	pvalue << c;
	358	break;
	359	}
	360	}
	361
	362	#undef IS_WHITE
	363	}
	364	m_Begin = i;
	365
	366	cache->QueryTag(pos, &m_End1, &m_End2);
	367	if (m_End1 > end_pos) m_End1 = end_pos;
	368	if (m_End2 > end_pos) m_End2 = end_pos;
	369	}
	370
	371	wxHtmlTag::~wxHtmlTag()
	372	{
	373	wxHtmlTag t1, t2;
	374	t1 = m_FirstChild;
	375	while (t1)
	376	{
	377	t2 = t1->GetNextSibling();
	378	delete t1;
	379	t1 = t2;
	380	}
	381	}
	382
	383	bool wxHtmlTag::HasParam(const wxString& par) const
	384	{
	385	return (m_ParamNames.Index(par, false) != wxNOT_FOUND);
	386	}
	387
	388	wxString wxHtmlTag::GetParam(const wxString& par, bool with_commas) const
	389	{
	390	int index = m_ParamNames.Index(par, false);
	391	if (index == wxNOT_FOUND)
	392	return wxEmptyString;
	393	if (with_commas)
	394	{
	395	// VS: backward compatibility, seems to be never used by wxHTML...
	396	wxString s;
	397	s << wxT('"') << m_ParamValues[index] << wxT('"');
	398	return s;
	399	}
	400	else
	401	return m_ParamValues[index];
	402	}
	403
	404	int wxHtmlTag::ScanParam(const wxString& par,
	405	const wxChar *format,
	406	void *param) const
	407	{
	408	wxString parval = GetParam(par);
	409	return wxSscanf(parval, format, param);
	410	}
	411
	412	bool wxHtmlTag::GetParamAsColour(const wxString& par, wxColour *clr) const
	413	{
	414	wxString str = GetParam(par);
	415
	416	if (str.empty()) return false;
	417	if (str.GetChar(0) == wxT('#'))
	418	{
	419	unsigned long tmp;
	420	if (ScanParam(par, wxT("#%lX"), &tmp) != 1)
	421	return false;
	422	*clr = wxColour((unsigned char)((tmp & 0xFF0000) >> 16),
	423	(unsigned char)((tmp & 0x00FF00) >> 8),
	424	(unsigned char)(tmp & 0x0000FF));
	425	return true;
	426	}
	427	else
	428	{
	429	// Handle colours defined in HTML 4.0:
	430	#define HTML_COLOUR(name,r,g,b) \
	431	if (str.IsSameAs(wxT(name), false)) \
	432	{ *clr = wxColour(r,g,b); return true; }
	433	HTML_COLOUR("black", 0x00,0x00,0x00)
	434	HTML_COLOUR("silver", 0xC0,0xC0,0xC0)
	435	HTML_COLOUR("gray", 0x80,0x80,0x80)
	436	HTML_COLOUR("white", 0xFF,0xFF,0xFF)
	437	HTML_COLOUR("maroon", 0x80,0x00,0x00)
	438	HTML_COLOUR("red", 0xFF,0x00,0x00)
	439	HTML_COLOUR("purple", 0x80,0x00,0x80)
	440	HTML_COLOUR("fuchsia", 0xFF,0x00,0xFF)
	441	HTML_COLOUR("green", 0x00,0x80,0x00)
	442	HTML_COLOUR("lime", 0x00,0xFF,0x00)
	443	HTML_COLOUR("olive", 0x80,0x80,0x00)
	444	HTML_COLOUR("yellow", 0xFF,0xFF,0x00)
	445	HTML_COLOUR("navy", 0x00,0x00,0x80)
	446	HTML_COLOUR("blue", 0x00,0x00,0xFF)
	447	HTML_COLOUR("teal", 0x00,0x80,0x80)
	448	HTML_COLOUR("aqua", 0x00,0xFF,0xFF)
	449	#undef HTML_COLOUR
	450	}
	451
	452	return false;
	453	}
	454
	455	bool wxHtmlTag::GetParamAsInt(const wxString& par, int *clr) const
	456	{
	457	if (!HasParam(par)) return false;
	458	long i;
	459	bool succ = GetParam(par).ToLong(&i);
	460	*clr = (int)i;
	461	return succ;
	462	}
	463
	464	wxString wxHtmlTag::GetAllParams() const
	465	{
	466	// VS: this function is for backward compatibility only,
	467	// never used by wxHTML
	468	wxString s;
	469	size_t cnt = m_ParamNames.GetCount();
	470	for (size_t i = 0; i < cnt; i++)
	471	{
	472	s << m_ParamNames[i];
	473	s << wxT('=');
	474	if (m_ParamValues[i].Find(wxT('"')) != wxNOT_FOUND)
	475	s << wxT('\'') << m_ParamValues[i] << wxT('\'');
	476	else
	477	s << wxT('"') << m_ParamValues[i] << wxT('"');
	478	}
	479	return s;
	480	}
	481
	482	wxHtmlTag *wxHtmlTag::GetFirstSibling() const
	483	{
	484	if (m_Parent)
	485	return m_Parent->m_FirstChild;
	486	else
	487	{
	488	wxHtmlTag cur = (wxHtmlTag)this;
	489	while (cur->m_Prev)
	490	cur = cur->m_Prev;
	491	return cur;
	492	}
	493	}
	494
	495	wxHtmlTag *wxHtmlTag::GetLastSibling() const
	496	{
	497	if (m_Parent)
	498	return m_Parent->m_LastChild;
	499	else
	500	{
	501	wxHtmlTag cur = (wxHtmlTag)this;
	502	while (cur->m_Next)
	503	cur = cur->m_Next;
	504	return cur;
	505	}
	506	}
	507
	508	wxHtmlTag *wxHtmlTag::GetNextTag() const
	509	{
	510	if (m_FirstChild) return m_FirstChild;
	511	if (m_Next) return m_Next;
	512	wxHtmlTag *cur = m_Parent;
	513	if (!cur) return NULL;
	514	while (cur->m_Parent && !cur->m_Next)
	515	cur = cur->m_Parent;
	516	return cur->m_Next;
	517	}
	518
	519	#if WXWIN_COMPATIBILITY_2_2
	520
	521	bool wxHtmlTag::IsEnding() const
	522	{
	523	return false;
	524	}
	525
	526	#endif // WXWIN_COMPATIBILITY_2_2
	527
	528	#endif