[wxWidgets.git] / 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
/////////////////////////////////////////////////////////////////////////////


#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/htmltag.h"
#include <stdio.h> // for vsscanf
#include <stdarg.h>


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

IMPLEMENT_CLASS(wxHtmlTagsCache,wxObject)

#define CACHE_INCREMENT  64

wxHtmlTagsCache::wxHtmlTagsCache(const wxString& source)
{
    const wxChar *src = source.c_str();
    int i, tg, pos, stpos;
    int lng = source.Length();
    wxChar dummy[256];

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

    pos = 0;
    while (pos < lng) {
        if (src[pos] == wxT('<')) {  // tag found:
            if (m_CacheSize % CACHE_INCREMENT == 0)
                m_Cache = (sCacheItem*) realloc(m_Cache, (m_CacheSize + CACHE_INCREMENT) * sizeof(sCacheItem));
            tg = m_CacheSize++;
            m_Cache[tg].Key = stpos = pos++;
            dummy[0] = 0; i = 0;
            while (pos < lng && 
                   src[pos] != wxT('>') &&
                   src[pos] != wxT(' ') && src[pos] != wxT('\r') && 
                   src[pos] != wxT('\n') && src[pos] != wxT('\t')) {
                dummy[i] = src[pos++];
                if ((dummy[i] >= wxT('a')) && (dummy[i] <= wxT('z'))) dummy[i] -= (wxT('a') - wxT('A'));
                i++;
            }
            dummy[i] = 0;
            m_Cache[tg].Name = new wxChar[i+1];
            memcpy(m_Cache[tg].Name, dummy, (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, dummy+1) == 0)) {
                        m_Cache[i].End1 = stpos;
                        m_Cache[i].End2 = pos + 1;
                        break;
                    }
            }
            else {
                m_Cache[tg].End1 = m_Cache[tg].End2 = -1;
            }
        }

        pos++;
    }

    // ok, we're done, now we'll free .Name members of cache - we don't need it anymore:
    for (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 {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(const wxString& source, int pos, int end_pos, wxHtmlTagsCache* cache) : wxObject()
{
    int i;
    char c;

    // fill-in name, params and begin pos:
    m_Name = m_Params = wxEmptyString;
    i = pos+1;
    if (source[i] == '/') {m_Ending = TRUE; i++;}
    else m_Ending = FALSE;

    while ((i < end_pos) && 
               ((c = source[i++]) != ' ' && c != '\r' && c != '\n' && c != '\t' &&
                c != '>')) {
        if ((c >= 'a') && (c <= 'z')) c -= ('a' - 'A');
        m_Name += c;
    }

    if (source[i-1] != '>')
        while ((i < end_pos) && ((c = source[i++]) != '>')) {
            if ((c >= 'a') && (c <= 'z')) c -= ('a' - 'A');
            if (c == '\r' || c == '\n' || c == '\t') c = ' '; // make future parsing a bit simpler
            m_Params += c;
            if (c == '"') {
                while ((i < end_pos) && ((c = source[i++]) != '"')) m_Params += c;
                m_Params += c;
            }
            else if (c == '\'') {
                while ((i < end_pos) && ((c = source[i++]) != '\'')) m_Params += c;
                m_Params += c;
            }
        }
   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;
}

    
bool wxHtmlTag::HasParam(const wxString& par) const
{
    const wxChar *st = m_Params, *p = par;
    const wxChar *st2, *p2;

    if (*st == 0) return FALSE;
    if (*p == 0) return FALSE;
    for (st2 = st, p2 = p; ; st2++) {
        if (*p2 == 0) return TRUE;
        if (*st2 == 0) return FALSE;
        if (*p2 != *st2) p2 = p;
        if (*p2 == *st2) p2++;
        if (*st2 == ' ') p2 = p;
        else if (*st2 == '=') {
            p2 = p;
            while (*st2 != ' ') {
                if (*st2 == '"') {
                    st2++;
                    while (*st2 != '"') st2++;
                }
                st2++;
                if (*st2 == 0) return FALSE;
            }
        }
    }
}


wxString wxHtmlTag::GetParam(const wxString& par, bool with_commas) const
{
    const wxChar *st = m_Params, *p = par;
    const wxChar *st2, *p2;
    bool comma;
    char comma_char;

    if (*st == 0) return "";
    if (*p == 0) return "";
    for (st2 = st, p2 = p; ; st2++) {
        if (*p2 == 0) { // found
            wxString fnd = "";
            st2++; // '=' character
            comma = FALSE;
	    comma_char = '\0';
            if (!with_commas && (*(st2) == '"')) {
	        st2++;
		comma = TRUE; 
		comma_char = '"';
	    }
	    else if (!with_commas && (*(st2) == '\'')) {
	        st2++; 
		comma = TRUE;
		comma_char = '\'';
	    }
            while (*st2 != 0) {
                if (comma && *st2 == comma_char) comma = FALSE;
                else if ((*st2 == ' ') && (!comma)) break;
                fnd += (*(st2++));
            }
            if (!with_commas && (*(st2-1) == comma_char)) fnd.RemoveLast();
            return fnd;
        }
        if (*st2 == 0) return "";
        if (*p2 != *st2) p2 = p;
        if (*p2 == *st2) p2++;
        if (*st2 == ' ') p2 = p;
        else if (*st2 == '=') {
            p2 = p;
            while (*st2 != ' ') {
                if (*st2 == '"') {
                    st2++;
                    while (*st2 != '"') st2++;
                }
                else if (*st2 == '\'') {
                    st2++;
                    while (*st2 != '\'') st2++;
                }
                st2++;
            }
        }
    }
}


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

#endif
Commit	Line	Data
5526e819 VS	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: htmltag.cpp
	3	// Purpose: wxHtmlTag class (represents single tag)
	4	// Author: Vaclav Slavik
69941f05	5	// RCS-ID: $Id$
5526e819 VS	6	// Copyright: (c) 1999 Vaclav Slavik
	7	// Licence: wxWindows Licence
	8	/////////////////////////////////////////////////////////////////////////////
	9
	10
	11	#ifdef __GNUG__
	12	#pragma implementation
	13	#endif
	14
3096bd2f	15	#include "wx/wxprec.h"
5526e819 VS	16
	17	#include "wx/defs.h"
	18	#if wxUSE_HTML
	19
	20	#ifdef __BORDLANDC__
	21	#pragma hdrstop
	22	#endif
	23
	24	#ifndef WXPRECOMP
3096bd2f	25	#include "wx/wx.h"
5526e819 VS	26	#endif
5526e819 VS	27
69941f05	28	#include "wx/html/htmltag.h"
7e1e0960	29	#include <stdio.h> // for vsscanf
5526e819 VS	30	#include <stdarg.h>
	31
	32
	33
	34
	35	//-----------------------------------------------------------------------------
	36	// wxHtmlTagsCache
	37	//-----------------------------------------------------------------------------
	38
	39	IMPLEMENT_CLASS(wxHtmlTagsCache,wxObject)
	40
	41	#define CACHE_INCREMENT 64
	42
	43	wxHtmlTagsCache::wxHtmlTagsCache(const wxString& source)
	44	{
66a77a74	45	const wxChar *src = source.c_str();
5526e819 VS	46	int i, tg, pos, stpos;
5526e819 VS	47	int lng = source.Length();
66a77a74	48	wxChar dummy[256];
5526e819 VS	49
	50	m_Cache = NULL;
	51	m_CacheSize = 0;
	52	m_CachePos = 0;
	53
	54	pos = 0;
	55	while (pos < lng) {
66a77a74	56	if (src[pos] == wxT('<')) { // tag found:
5526e819 VS	57	if (m_CacheSize % CACHE_INCREMENT == 0)
	58	m_Cache = (sCacheItem) realloc(m_Cache, (m_CacheSize + CACHE_INCREMENT) sizeof(sCacheItem));
	59	tg = m_CacheSize++;
	60	m_Cache[tg].Key = stpos = pos++;
	61	dummy[0] = 0; i = 0;
15db3cf5 VS	62	while (pos < lng &&
15db3cf5 VS	63	src[pos] != wxT('>') &&
f6bcfd97 BP	64	src[pos] != wxT(' ') && src[pos] != wxT('\r') &&
f6bcfd97 BP	65	src[pos] != wxT('\n') && src[pos] != wxT('\t')) {
5526e819	66	dummy[i] = src[pos++];
66a77a74	67	if ((dummy[i] >= wxT('a')) && (dummy[i] <= wxT('z'))) dummy[i] -= (wxT('a') - wxT('A'));
5526e819 VS	68	i++;
	69	}
	70	dummy[i] = 0;
66a77a74 OK	71	m_Cache[tg].Name = new wxChar[i+1];
66a77a74 OK	72	memcpy(m_Cache[tg].Name, dummy, (i+1)*sizeof(wxChar));
5526e819	73
15db3cf5	74	while (pos < lng && src[pos] != wxT('>')) pos++;
5526e819	75
66a77a74	76	if (src[stpos+1] == wxT('/')) { // ending tag:
5526e819 VS	77	m_Cache[tg].End1 = m_Cache[tg].End2 = -2;
	78	// find matching begin tag:
	79	for (i = tg; i >= 0; i--)
66a77a74	80	if ((m_Cache[i].End1 == -1) && (wxStrcmp(m_Cache[i].Name, dummy+1) == 0)) {
5526e819 VS	81	m_Cache[i].End1 = stpos;
	82	m_Cache[i].End2 = pos + 1;
	83	break;
	84	}
	85	}
	86	else {
	87	m_Cache[tg].End1 = m_Cache[tg].End2 = -1;
	88	}
	89	}
	90
	91	pos++;
	92	}
	93
	94	// ok, we're done, now we'll free .Name members of cache - we don't need it anymore:
	95	for (i = 0; i < m_CacheSize; i++) {
2776d7c3	96	delete[] m_Cache[i].Name;
5526e819 VS	97	m_Cache[i].Name = NULL;
	98	}
	99	}
	100
	101
	102
	103	void wxHtmlTagsCache::QueryTag(int at, int* end1, int* end2)
	104	{
	105	if (m_Cache == NULL) return;
	106	if (m_Cache[m_CachePos].Key != at) {
	107	int delta = (at < m_Cache[m_CachePos].Key) ? -1 : 1;
	108	do {m_CachePos += delta;} while (m_Cache[m_CachePos].Key != at);
	109	}
	110	*end1 = m_Cache[m_CachePos].End1;
	111	*end2 = m_Cache[m_CachePos].End2;
	112	}
	113
	114
	115
	116
	117	//-----------------------------------------------------------------------------
	118	// wxHtmlTag
	119	//-----------------------------------------------------------------------------
	120
	121	IMPLEMENT_CLASS(wxHtmlTag,wxObject)
	122
	123	wxHtmlTag::wxHtmlTag(const wxString& source, int pos, int end_pos, wxHtmlTagsCache* cache) : wxObject()
	124	{
	125	int i;
	126	char c;
	127
	128	// fill-in name, params and begin pos:
	129	m_Name = m_Params = wxEmptyString;
	130	i = pos+1;
	131	if (source[i] == '/') {m_Ending = TRUE; i++;}
	132	else m_Ending = FALSE;
	133
f6bcfd97 BP	134	while ((i < end_pos) &&
	135	((c = source[i++]) != ' ' && c != '\r' && c != '\n' && c != '\t' &&
	136	c != '>')) {
5526e819 VS	137	if ((c >= 'a') && (c <= 'z')) c -= ('a' - 'A');
	138	m_Name += c;
	139	}
	140
	141	if (source[i-1] != '>')
	142	while ((i < end_pos) && ((c = source[i++]) != '>')) {
	143	if ((c >= 'a') && (c <= 'z')) c -= ('a' - 'A');
f6bcfd97	144	if (c == '\r' \|\| c == '\n' \|\| c == '\t') c = ' '; // make future parsing a bit simpler
5526e819 VS	145	m_Params += c;
	146	if (c == '"') {
	147	while ((i < end_pos) && ((c = source[i++]) != '"')) m_Params += c;
	148	m_Params += c;
	149	}
72aa4a98 VS	150	else if (c == '\'') {
	151	while ((i < end_pos) && ((c = source[i++]) != '\'')) m_Params += c;
	152	m_Params += c;
	153	}
5526e819 VS	154	}
	155	m_Begin = i;
	156
	157	cache -> QueryTag(pos, &m_End1, &m_End2);
	158	if (m_End1 > end_pos) m_End1 = end_pos;
	159	if (m_End2 > end_pos) m_End2 = end_pos;
	160	}
	161
	162
	163
	164	bool wxHtmlTag::HasParam(const wxString& par) const
	165	{
66a77a74 OK	166	const wxChar st = m_Params, p = par;
66a77a74 OK	167	const wxChar st2, p2;
5526e819 VS	168
	169	if (*st == 0) return FALSE;
	170	if (*p == 0) return FALSE;
	171	for (st2 = st, p2 = p; ; st2++) {
	172	if (*p2 == 0) return TRUE;
	173	if (*st2 == 0) return FALSE;
	174	if (p2 != st2) p2 = p;
	175	if (p2 == st2) p2++;
	176	if (*st2 == ' ') p2 = p;
	177	else if (*st2 == '=') {
	178	p2 = p;
	179	while (*st2 != ' ') {
	180	if (*st2 == '"') {
	181	st2++;
	182	while (*st2 != '"') st2++;
	183	}
	184	st2++;
	185	if (*st2 == 0) return FALSE;
	186	}
	187	}
	188	}
	189	}
	190
	191
	192
	193	wxString wxHtmlTag::GetParam(const wxString& par, bool with_commas) const
	194	{
66a77a74 OK	195	const wxChar st = m_Params, p = par;
66a77a74 OK	196	const wxChar st2, p2;
5526e819	197	bool comma;
72aa4a98	198	char comma_char;
5526e819 VS	199
	200	if (*st == 0) return "";
	201	if (*p == 0) return "";
	202	for (st2 = st, p2 = p; ; st2++) {
	203	if (*p2 == 0) { // found
	204	wxString fnd = "";
	205	st2++; // '=' character
	206	comma = FALSE;
72aa4a98 VS	207	comma_char = '\0';
	208	if (!with_commas && (*(st2) == '"')) {
	209	st2++;
	210	comma = TRUE;
	211	comma_char = '"';
	212	}
	213	else if (!with_commas && (*(st2) == '\'')) {
	214	st2++;
	215	comma = TRUE;
	216	comma_char = '\'';
	217	}
5526e819	218	while (*st2 != 0) {
72aa4a98	219	if (comma && *st2 == comma_char) comma = FALSE;
5526e819 VS	220	else if ((*st2 == ' ') && (!comma)) break;
	221	fnd += (*(st2++));
	222	}
72aa4a98	223	if (!with_commas && (*(st2-1) == comma_char)) fnd.RemoveLast();
5526e819 VS	224	return fnd;
	225	}
	226	if (*st2 == 0) return "";
	227	if (p2 != st2) p2 = p;
	228	if (p2 == st2) p2++;
	229	if (*st2 == ' ') p2 = p;
	230	else if (*st2 == '=') {
	231	p2 = p;
	232	while (*st2 != ' ') {
	233	if (*st2 == '"') {
	234	st2++;
	235	while (*st2 != '"') st2++;
	236	}
72aa4a98 VS	237	else if (*st2 == '\'') {
	238	st2++;
	239	while (*st2 != '\'') st2++;
	240	}
5526e819 VS	241	st2++;
	242	}
	243	}
	244	}
	245	}
	246
	247
	248
66a77a74	249	int wxHtmlTag::ScanParam(const wxString& par, wxChar format, void param) const
5526e819	250	{
5526e819	251	wxString parval = GetParam(par);
66a77a74	252	return wxSscanf((const wxChar*)parval, format, param);
5526e819 VS	253	}
5526e819 VS	254
4d223b67	255	#endif