[wxWidgets.git] / src / common / markupparser.cpp

///////////////////////////////////////////////////////////////////////////////
// Name:        src/common/markupparser.cpp
// Purpose:     Implementation of wxMarkupParser.
// Author:      Vadim Zeitlin
// Created:     2011-02-16
// Copyright:   (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
// Licence:     wxWindows licence
///////////////////////////////////////////////////////////////////////////////

// ============================================================================
// declarations
// ============================================================================

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

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

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_MARKUP

#ifndef WX_PRECOMP
    #include "wx/log.h"
#endif

#include "wx/private/markupparser.h"

#include "wx/stack.h"

namespace
{

// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------

// Array containing the predefined XML 1.0 entities.
const struct XMLEntity
{
    const char *name;
    int len;            // == strlen(name)
    char value;
} xmlEntities[] =
{
    { "lt",     2,  '<' },
    { "gt",     2,  '>' },
    { "amp",    3,  '&' },
    { "apos",   4,  '\''},
    { "quot",   4,  '"' },
};

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

wxString
ExtractUntil(char ch, wxString::const_iterator& it, wxString::const_iterator end)
{
    wxString str;
    for ( ; it != end; ++it )
    {
        if ( *it == ch )
            return str;

        str += *it;
    }

    // Return empty string to indicate that we didn't find ch at all.
    return wxString();
}

} // anonymous namespace

// ============================================================================
// wxMarkupParser implementation
// ============================================================================

wxString
wxMarkupParser::ParseAttrs(wxString attrs, TagAndAttrs& tagAndAttrs)
{
    if ( tagAndAttrs.name.CmpNoCase("span") != 0 && !attrs.empty() )
    {
        return wxString::Format("tag \"%s\" can't have attributes",
                                tagAndAttrs.name);
    }

    // TODO: Parse more attributes described at
    //       http://library.gnome.org/devel/pango/stable/PangoMarkupFormat.html
    //       and at least ignore them gracefully instead of giving errors (but
    //       quite a few of them could be supported as well, notable font_desc).

    wxMarkupSpanAttributes& spanAttrs = tagAndAttrs.attrs;

    while ( !attrs.empty() )
    {
        wxString rest;
        const wxString attr = attrs.BeforeFirst(' ', &rest);
        attrs = rest;

        // The "original" versions are used for error messages only.
        wxString valueOrig;
        const wxString nameOrig = attr.BeforeFirst('=', &valueOrig);

        const wxString name = nameOrig.Lower();
        wxString value = valueOrig.Lower();

        // All attributes values must be quoted.
        if ( value.length() < 2 ||
                (value[0] != value.Last()) ||
                    (value[0] != '"' && value[0] != '\'') )
        {
            return wxString::Format("bad quoting for value of \"%s\"",
                                    nameOrig);
        }

        value.assign(value, 1, value.length() - 2);

        if ( name == "foreground" || name == "fgcolor" || name == "color" )
        {
            spanAttrs.m_fgCol = value;
        }
        else if ( name == "background" || name == "bgcolor" )
        {
            spanAttrs.m_bgCol = value;
        }
        else if ( name == "font_family" || name == "face" )
        {
            spanAttrs.m_fontFace = value;
        }
        else if ( name == "font_weight" || name == "weight" )
        {
            unsigned long weight;

            if ( value == "ultralight" || value == "light" || value == "normal" )
                spanAttrs.m_isBold = wxMarkupSpanAttributes::No;
            else if ( value == "bold" || value == "ultrabold" || value == "heavy" )
                spanAttrs.m_isBold = wxMarkupSpanAttributes::Yes;
            else if ( value.ToULong(&weight) )
                spanAttrs.m_isBold = weight >= 600 ? wxMarkupSpanAttributes::Yes
                                                   : wxMarkupSpanAttributes::No;
            else
                return wxString::Format("invalid font weight \"%s\"", valueOrig);
        }
        else if ( name == "font_style" || name == "style" )
        {
            if ( value == "normal" )
                spanAttrs.m_isItalic = wxMarkupSpanAttributes::No;
            else if ( value == "oblique" || value == "italic" )
                spanAttrs.m_isItalic = wxMarkupSpanAttributes::Yes;
            else
                return wxString::Format("invalid font style \"%s\"", valueOrig);
        }
        else if ( name == "size" )
        {
            unsigned long size;
            if ( value.ToULong(&size) )
            {
                spanAttrs.m_sizeKind = wxMarkupSpanAttributes::Size_PointParts;
                spanAttrs.m_fontSize = size;
            }
            else if ( value == "smaller" || value == "larger" )
            {
                spanAttrs.m_sizeKind = wxMarkupSpanAttributes::Size_Relative;
                spanAttrs.m_fontSize = value == "smaller" ? -1 : +1;
            }
            else // Must be a CSS-like size specification
            {
                int cssSize = 1;
                if ( value.StartsWith("xx-", &rest) )
                    cssSize = 3;
                else if ( value.StartsWith("x-", &rest) )
                    cssSize = 2;
                else if ( value == "medium" )
                    cssSize = 0;
                else
                    rest = value;

                if ( cssSize != 0 )
                {
                    if ( rest == "small" )
                        cssSize = -cssSize;
                    else if ( rest != "large" )
                        return wxString::Format("invalid font size \"%s\"",
                                                valueOrig);
                }

                spanAttrs.m_sizeKind = wxMarkupSpanAttributes::Size_Symbolic;
                spanAttrs.m_fontSize = cssSize;
            }
        }
    }

    return wxString();
}

bool wxMarkupParser::OutputTag(const TagAndAttrs& tagAndAttrs, bool start)
{
    if ( tagAndAttrs.name.CmpNoCase("span") == 0 )
    {
        if ( start )
            m_output.OnSpanStart(tagAndAttrs.attrs);
        else
            m_output.OnSpanEnd(tagAndAttrs.attrs);

        return true;
    }
    else // non-span tag
    {
        static const struct TagHandler
        {
            const char *name;
            void (wxMarkupParserOutput::*startFunc)();
            void (wxMarkupParserOutput::*endFunc)();
        } tagHandlers[] =
        {
            { "b", &wxMarkupParserOutput::OnBoldStart,
                   &wxMarkupParserOutput::OnBoldEnd },
            { "i", &wxMarkupParserOutput::OnItalicStart,
                   &wxMarkupParserOutput::OnItalicEnd },
            { "u", &wxMarkupParserOutput::OnUnderlinedStart,
                   &wxMarkupParserOutput::OnUnderlinedEnd },
            { "s", &wxMarkupParserOutput::OnStrikethroughStart,
                   &wxMarkupParserOutput::OnStrikethroughEnd },
            { "big", &wxMarkupParserOutput::OnBigStart,
                     &wxMarkupParserOutput::OnBigEnd },
            { "small", &wxMarkupParserOutput::OnSmallStart,
                       &wxMarkupParserOutput::OnSmallEnd },
            { "tt", &wxMarkupParserOutput::OnTeletypeStart,
                    &wxMarkupParserOutput::OnTeletypeEnd },
        };

        for ( unsigned n = 0; n < WXSIZEOF(tagHandlers); n++ )
        {
            const TagHandler& h = tagHandlers[n];

            if ( tagAndAttrs.name.CmpNoCase(h.name) == 0 )
            {
                if ( start )
                    (m_output.*(h.startFunc))();
                else
                    (m_output.*(h.endFunc))();

                return true;
            }
        }
    }

    // Unknown tag name.
    return false;
}

bool wxMarkupParser::Parse(const wxString& text)
{
    // The stack containing the names and corresponding attributes (which are
    // actually only used for <span> tags) of all of the currently opened tag
    // or none if we're not inside any tag.
    wxStack<TagAndAttrs> tags;

    // Current run of text.
    wxString current;

    const wxString::const_iterator end = text.end();
    for ( wxString::const_iterator it = text.begin(); it != end; ++it )
    {
        switch ( (*it).GetValue() )
        {
            case '<':
                {
                    // Flush the text preceding the tag, if any.
                    if ( !current.empty() )
                    {
                        m_output.OnText(current);
                        current.clear();
                    }

                    // This variable is used only in the debugging messages
                    // and doesn't need to be defined if they're not compiled
                    // at all (it actually would result in unused variable
                    // messages in this case).
#if wxUSE_LOG_DEBUG || !defined(HAVE_VARIADIC_MACROS)
                    // Remember the tag starting position for the error
                    // messages.
                    const size_t pos = it - text.begin();
#endif
                    bool start = true;
                    if ( ++it != end && *it == '/' )
                    {
                        start = false;
                        ++it;
                    }

                    const wxString tag = ExtractUntil('>', it, end);
                    if ( tag.empty() )
                    {
                        wxLogDebug("%s at %lu.",
                                   it == end ? "Unclosed tag starting"
                                             : "Empty tag",
                                   pos);
                        return false;
                    }

                    if ( start )
                    {
                        wxString attrs;
                        const wxString name = tag.BeforeFirst(' ', &attrs);

                        TagAndAttrs tagAndAttrs(name);
                        const wxString err = ParseAttrs(attrs, tagAndAttrs);
                        if ( !err.empty() )
                        {
                            wxLogDebug("Bad attributes for \"%s\" "
                                       "at %lu: %s.",
                                       name, pos, err);
                            return false;
                        }

                        tags.push(tagAndAttrs);
                    }
                    else // end tag
                    {
                        if ( tags.empty() || tags.top().name != tag )
                        {
                            wxLogDebug("Unmatched closing tag \"%s\" at %lu.",
                                       tag, pos);
                            return false;
                        }
                    }

                    if ( !OutputTag(tags.top(), start) )
                    {
                        wxLogDebug("Unknown tag at %lu.", pos);
                        return false;
                    }

                    if ( !start )
                        tags.pop();
                }
                break;

            case '>':
                wxLogDebug("'>' should be escaped as \"&gt\"; at %lu.",
                           it - text.begin());
                break;

            case '&':
                // Processing is somewhat complicated: we need to recognize at
                // least the "&lt;" entity to allow escaping left square
                // brackets in the markup and, in fact, we recognize all of the
                // standard XML entities for consistency with Pango markup
                // parsing.
                //
                // However we also allow '&' to appear unescaped, i.e. directly
                // and not as "&amp;" when it is used to introduce the mnemonic
                // for the label. In this case we simply leave it alone.
                //
                // Notice that this logic makes it impossible to have a label
                // with "lt;" inside it and using "l" as mnemonic but hopefully
                // this shouldn't be a problem in practice.
                {
                    const size_t pos = it - text.begin() + 1;

                    unsigned n;
                    for ( n = 0; n < WXSIZEOF(xmlEntities); n++ )
                    {
                        const XMLEntity& xmlEnt = xmlEntities[n];
                        if ( text.compare(pos, xmlEnt.len, xmlEnt.name) == 0
                                && text[pos + xmlEnt.len] == ';' )
                        {
                            // Escape the ampersands if needed to protect them
                            // from being interpreted as mnemonics indicators.
                            if ( xmlEnt.value == '&' )
                                current += "&&";
                            else
                                current += xmlEnt.value;

                            it += xmlEnt.len + 1; // +1 for '&' itself

                            break;
                        }
                    }

                    if ( n < WXSIZEOF(xmlEntities) )
                        break;
                    //else: fall through, '&' is not special
                }

            default:
                current += *it;
        }
    }

    if ( !tags.empty() )
    {
        wxLogDebug("Missing closing tag for \"%s\"", tags.top().name);
        return false;
    }

    if ( !current.empty() )
        m_output.OnText(current);

    return true;
}

/* static */
wxString wxMarkupParser::Quote(const wxString& text)
{
    wxString quoted;
    quoted.reserve(text.length());

    for ( wxString::const_iterator it = text.begin(); it != text.end(); ++it )
    {
        unsigned n;
        for ( n = 0; n < WXSIZEOF(xmlEntities); n++ )
        {
            const XMLEntity& xmlEnt = xmlEntities[n];
            if ( *it == xmlEnt.value )
            {
                quoted << '&' << xmlEnt.name << ';';
                break;
            }
        }

        if ( n == WXSIZEOF(xmlEntities) )
            quoted += *it;
    }

    return quoted;
}

/* static */
wxString wxMarkupParser::Strip(const wxString& text)
{
    class StripOutput : public wxMarkupParserOutput
    {
    public:
        StripOutput() { }

        const wxString& GetText() const { return m_text; }

        virtual void OnText(const wxString& text) { m_text += text; }

        virtual void OnBoldStart() { }
        virtual void OnBoldEnd() { }

        virtual void OnItalicStart() { }
        virtual void OnItalicEnd() { }

        virtual void OnUnderlinedStart() { }
        virtual void OnUnderlinedEnd() { }

        virtual void OnStrikethroughStart() { }
        virtual void OnStrikethroughEnd() { }

        virtual void OnBigStart() { }
        virtual void OnBigEnd() { }

        virtual void OnSmallStart() { }
        virtual void OnSmallEnd() { }

        virtual void OnTeletypeStart() { }
        virtual void OnTeletypeEnd() { }

        virtual void OnSpanStart(const wxMarkupSpanAttributes& WXUNUSED(a)) { }
        virtual void OnSpanEnd(const wxMarkupSpanAttributes& WXUNUSED(a)) { }

    private:
        wxString m_text;
    };

    StripOutput output;
    wxMarkupParser parser(output);
    if ( !parser.Parse(text) )
        return wxString();

    return output.GetText();
}

#endif // wxUSE_MARKUP
Commit	Line	Data
9bb9964e VZ	1	///////////////////////////////////////////////////////////////////////////////
	2	// Name: src/common/markupparser.cpp
	3	// Purpose: Implementation of wxMarkupParser.
	4	// Author: Vadim Zeitlin
	5	// Created: 2011-02-16
9bb9964e VZ	6	// Copyright: (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
	7	// Licence: wxWindows licence
	8	///////////////////////////////////////////////////////////////////////////////
	9
	10	// ============================================================================
	11	// declarations
	12	// ============================================================================
	13
	14	// ----------------------------------------------------------------------------
	15	// headers
	16	// ----------------------------------------------------------------------------
	17
	18	// for compilers that support precompilation, includes "wx.h".
	19	#include "wx/wxprec.h"
	20
	21	#ifdef __BORLANDC__
	22	#pragma hdrstop
	23	#endif
	24
f5bdfc69	25	#if wxUSE_MARKUP
9bb9964e	26
1a6e6d54 VZ	27	#ifndef WX_PRECOMP
	28	#include "wx/log.h"
	29	#endif
	30
9bb9964e VZ	31	#include "wx/private/markupparser.h"
	32
	33	#include "wx/stack.h"
	34
	35	namespace
	36	{
	37
	38	// ----------------------------------------------------------------------------
	39	// constants
	40	// ----------------------------------------------------------------------------
	41
	42	// Array containing the predefined XML 1.0 entities.
	43	const struct XMLEntity
	44	{
	45	const char *name;
	46	int len; // == strlen(name)
	47	char value;
	48	} xmlEntities[] =
	49	{
	50	{ "lt", 2, '<' },
	51	{ "gt", 2, '>' },
	52	{ "amp", 3, '&' },
	53	{ "apos", 4, '\''},
	54	{ "quot", 4, '"' },
	55	};
	56
	57	// ----------------------------------------------------------------------------
	58	// helper functions
	59	// ----------------------------------------------------------------------------
	60
	61	wxString
	62	ExtractUntil(char ch, wxString::const_iterator& it, wxString::const_iterator end)
	63	{
	64	wxString str;
	65	for ( ; it != end; ++it )
	66	{
	67	if ( *it == ch )
	68	return str;
	69
	70	str += *it;
	71	}
	72
	73	// Return empty string to indicate that we didn't find ch at all.
	74	return wxString();
	75	}
	76
	77	} // anonymous namespace
	78
	79	// ============================================================================
	80	// wxMarkupParser implementation
	81	// ============================================================================
	82
	83	wxString
	84	wxMarkupParser::ParseAttrs(wxString attrs, TagAndAttrs& tagAndAttrs)
	85	{
	86	if ( tagAndAttrs.name.CmpNoCase("span") != 0 && !attrs.empty() )
	87	{
	88	return wxString::Format("tag \"%s\" can't have attributes",
	89	tagAndAttrs.name);
	90	}
	91
	92	// TODO: Parse more attributes described at
	93	// http://library.gnome.org/devel/pango/stable/PangoMarkupFormat.html
	94	// and at least ignore them gracefully instead of giving errors (but
95	// quite a few of them could be supported as well, notable font_desc).
96
97	wxMarkupSpanAttributes& spanAttrs = tagAndAttrs.attrs;
98
99	while ( !attrs.empty() )
100	{
101	wxString rest;
102	const wxString attr = attrs.BeforeFirst(' ', &rest);
103	attrs = rest;
104
105	// The "original" versions are used for error messages only.
106	wxString valueOrig;
107	const wxString nameOrig = attr.BeforeFirst('=', &valueOrig);
108
109	const wxString name = nameOrig.Lower();
110	wxString value = valueOrig.Lower();
111
112	// All attributes values must be quoted.
113	if ( value.length() < 2 \|\|
114	(value[0] != value.Last()) \|\|
115	(value[0] != '"' && value[0] != '\'') )
116	{
117	return wxString::Format("bad quoting for value of \"%s\"",
118	nameOrig);
119	}
120
121	value.assign(value, 1, value.length() - 2);
122
123	if ( name == "foreground" \|\| name == "fgcolor" \|\| name == "color" )
124	{
125	spanAttrs.m_fgCol = value;
126	}
127	else if ( name == "background" \|\| name == "bgcolor" )
128	{
129	spanAttrs.m_bgCol = value;
130	}
131	else if ( name == "font_family" \|\| name == "face" )
132	{
133	spanAttrs.m_fontFace = value;
134	}
135	else if ( name == "font_weight" \|\| name == "weight" )
136	{
137	unsigned long weight;
138
139	if ( value == "ultralight" \|\| value == "light" \|\| value == "normal" )
140	spanAttrs.m_isBold = wxMarkupSpanAttributes::No;
141	else if ( value == "bold" \|\| value == "ultrabold" \|\| value == "heavy" )
142	spanAttrs.m_isBold = wxMarkupSpanAttributes::Yes;
143	else if ( value.ToULong(&weight) )
144	spanAttrs.m_isBold = weight >= 600 ? wxMarkupSpanAttributes::Yes
145	: wxMarkupSpanAttributes::No;
146	else
147	return wxString::Format("invalid font weight \"%s\"", valueOrig);
148	}
149	else if ( name == "font_style" \|\| name == "style" )
150	{
151	if ( value == "normal" )
152	spanAttrs.m_isItalic = wxMarkupSpanAttributes::No;
153	else if ( value == "oblique" \|\| value == "italic" )
154	spanAttrs.m_isItalic = wxMarkupSpanAttributes::Yes;
155	else
156	return wxString::Format("invalid font style \"%s\"", valueOrig);
157	}
158	else if ( name == "size" )
159	{
160	unsigned long size;
161	if ( value.ToULong(&size) )
162	{
163	spanAttrs.m_sizeKind = wxMarkupSpanAttributes::Size_PointParts;
164	spanAttrs.m_fontSize = size;
165	}
166	else if ( value == "smaller" \|\| value == "larger" )
167	{
168	spanAttrs.m_sizeKind = wxMarkupSpanAttributes::Size_Relative;
169	spanAttrs.m_fontSize = value == "smaller" ? -1 : +1;
170	}
171	else // Must be a CSS-like size specification
172	{
173	int cssSize = 1;
9bb9964e VZ	174	if ( value.StartsWith("xx-", &rest) )
	175	cssSize = 3;
	176	else if ( value.StartsWith("x-", &rest) )
	177	cssSize = 2;
	178	else if ( value == "medium" )
	179	cssSize = 0;
	180	else
	181	rest = value;
	182
	183	if ( cssSize != 0 )
	184	{
	185	if ( rest == "small" )
	186	cssSize = -cssSize;
	187	else if ( rest != "large" )
	188	return wxString::Format("invalid font size \"%s\"",
	189	valueOrig);
	190	}
	191
	192	spanAttrs.m_sizeKind = wxMarkupSpanAttributes::Size_Symbolic;
	193	spanAttrs.m_fontSize = cssSize;
	194	}
	195	}
	196	}
	197
	198	return wxString();
	199	}
	200
	201	bool wxMarkupParser::OutputTag(const TagAndAttrs& tagAndAttrs, bool start)
	202	{
	203	if ( tagAndAttrs.name.CmpNoCase("span") == 0 )
	204	{
	205	if ( start )
	206	m_output.OnSpanStart(tagAndAttrs.attrs);
	207	else
	208	m_output.OnSpanEnd(tagAndAttrs.attrs);
	209
	210	return true;
	211	}
	212	else // non-span tag
	213	{
	214	static const struct TagHandler
	215	{
	216	const char *name;
	217	void (wxMarkupParserOutput::*startFunc)();
	218	void (wxMarkupParserOutput::*endFunc)();
	219	} tagHandlers[] =
	220	{
	221	{ "b", &wxMarkupParserOutput::OnBoldStart,
	222	&wxMarkupParserOutput::OnBoldEnd },
	223	{ "i", &wxMarkupParserOutput::OnItalicStart,
	224	&wxMarkupParserOutput::OnItalicEnd },
	225	{ "u", &wxMarkupParserOutput::OnUnderlinedStart,
	226	&wxMarkupParserOutput::OnUnderlinedEnd },
	227	{ "s", &wxMarkupParserOutput::OnStrikethroughStart,
	228	&wxMarkupParserOutput::OnStrikethroughEnd },
	229	{ "big", &wxMarkupParserOutput::OnBigStart,
	230	&wxMarkupParserOutput::OnBigEnd },
	231	{ "small", &wxMarkupParserOutput::OnSmallStart,
	232	&wxMarkupParserOutput::OnSmallEnd },
	233	{ "tt", &wxMarkupParserOutput::OnTeletypeStart,
	234	&wxMarkupParserOutput::OnTeletypeEnd },
	235	};
	236
	237	for ( unsigned n = 0; n < WXSIZEOF(tagHandlers); n++ )
238	{
239	const TagHandler& h = tagHandlers[n];
240
241	if ( tagAndAttrs.name.CmpNoCase(h.name) == 0 )
242	{
243	if ( start )
244	(m_output.*(h.startFunc))();
245	else
246	(m_output.*(h.endFunc))();
247
248	return true;
249	}
250	}
251	}
252
253	// Unknown tag name.
254	return false;
255	}
256
257	bool wxMarkupParser::Parse(const wxString& text)
258	{
259	// The stack containing the names and corresponding attributes (which are
260	// actually only used for <span> tags) of all of the currently opened tag
261	// or none if we're not inside any tag.
262	wxStack<TagAndAttrs> tags;
263
264	// Current run of text.
265	wxString current;
266
267	const wxString::const_iterator end = text.end();
268	for ( wxString::const_iterator it = text.begin(); it != end; ++it )
269	{
270	switch ( (*it).GetValue() )
271	{
272	case '<':
273	{
274	// Flush the text preceding the tag, if any.
275	if ( !current.empty() )
276	{
277	m_output.OnText(current);
278	current.clear();
279	}
c564ca3c VZ	280
	281	// This variable is used only in the debugging messages
	282	// and doesn't need to be defined if they're not compiled
	283	// at all (it actually would result in unused variable
	284	// messages in this case).
e779f093	285	#if wxUSE_LOG_DEBUG \|\| !defined(HAVE_VARIADIC_MACROS)
9bb9964e VZ	286	// Remember the tag starting position for the error
	287	// messages.
	288	const size_t pos = it - text.begin();
e2cb99c8	289	#endif
9bb9964e VZ	290	bool start = true;
	291	if ( ++it != end && *it == '/' )
	292	{
	293	start = false;
	294	++it;
	295	}
	296
	297	const wxString tag = ExtractUntil('>', it, end);
	298	if ( tag.empty() )
	299	{
	300	wxLogDebug("%s at %lu.",
	301	it == end ? "Unclosed tag starting"
	302	: "Empty tag",
	303	pos);
	304	return false;
	305	}
	306
	307	if ( start )
	308	{
	309	wxString attrs;
	310	const wxString name = tag.BeforeFirst(' ', &attrs);
	311
	312	TagAndAttrs tagAndAttrs(name);
	313	const wxString err = ParseAttrs(attrs, tagAndAttrs);
	314	if ( !err.empty() )
	315	{
	316	wxLogDebug("Bad attributes for \"%s\" "
	317	"at %lu: %s.",
	318	name, pos, err);
	319	return false;
	320	}
	321
	322	tags.push(tagAndAttrs);
	323	}
	324	else // end tag
	325	{
	326	if ( tags.empty() \|\| tags.top().name != tag )
	327	{
	328	wxLogDebug("Unmatched closing tag \"%s\" at %lu.",
	329	tag, pos);
	330	return false;
	331	}
	332	}
	333
	334	if ( !OutputTag(tags.top(), start) )
	335	{
	336	wxLogDebug("Unknown tag at %lu.", pos);
	337	return false;
	338	}
	339
	340	if ( !start )
	341	tags.pop();
	342	}
	343	break;
	344
	345	case '>':
	346	wxLogDebug("'>' should be escaped as \"&gt\"; at %lu.",
	347	it - text.begin());
	348	break;
	349
	350	case '&':
	351	// Processing is somewhat complicated: we need to recognize at
	352	// least the "<" entity to allow escaping left square
	353	// brackets in the markup and, in fact, we recognize all of the
354	// standard XML entities for consistency with Pango markup
355	// parsing.
356	//
357	// However we also allow '&' to appear unescaped, i.e. directly
358	// and not as "&" when it is used to introduce the mnemonic
359	// for the label. In this case we simply leave it alone.
360	//
361	// Notice that this logic makes it impossible to have a label
362	// with "lt;" inside it and using "l" as mnemonic but hopefully
363	// this shouldn't be a problem in practice.
364	{
365	const size_t pos = it - text.begin() + 1;
366
367	unsigned n;
368	for ( n = 0; n < WXSIZEOF(xmlEntities); n++ )
369	{
370	const XMLEntity& xmlEnt = xmlEntities[n];
371	if ( text.compare(pos, xmlEnt.len, xmlEnt.name) == 0
372	&& text[pos + xmlEnt.len] == ';' )
373	{
374	// Escape the ampersands if needed to protect them
375	// from being interpreted as mnemonics indicators.
376	if ( xmlEnt.value == '&' )
377	current += "&&";
378	else
379	current += xmlEnt.value;
380
381	it += xmlEnt.len + 1; // +1 for '&' itself
382
383	break;
384	}
385	}
386
387	if ( n < WXSIZEOF(xmlEntities) )
388	break;
389	//else: fall through, '&' is not special
390	}
391
392	default:
393	current += *it;
394	}
395	}
396
397	if ( !tags.empty() )
398	{
399	wxLogDebug("Missing closing tag for \"%s\"", tags.top().name);
400	return false;
401	}
402
403	if ( !current.empty() )
404	m_output.OnText(current);
405
406	return true;
407	}
408
409	/* static */
410	wxString wxMarkupParser::Quote(const wxString& text)
411	{
412	wxString quoted;
413	quoted.reserve(text.length());
414
415	for ( wxString::const_iterator it = text.begin(); it != text.end(); ++it )
416	{
417	unsigned n;
418	for ( n = 0; n < WXSIZEOF(xmlEntities); n++ )
419	{
420	const XMLEntity& xmlEnt = xmlEntities[n];
421	if ( *it == xmlEnt.value )
422	{
423	quoted << '&' << xmlEnt.name << ';';
424	break;
425	}
426	}
427
428	if ( n == WXSIZEOF(xmlEntities) )
429	quoted += *it;
430	}
431
432	return quoted;
433	}
5eb051a7 VZ	434
	435	/* static */
	436	wxString wxMarkupParser::Strip(const wxString& text)
	437	{
	438	class StripOutput : public wxMarkupParserOutput
	439	{
	440	public:
	441	StripOutput() { }
	442
	443	const wxString& GetText() const { return m_text; }
	444
	445	virtual void OnText(const wxString& text) { m_text += text; }
	446
	447	virtual void OnBoldStart() { }
	448	virtual void OnBoldEnd() { }
	449
	450	virtual void OnItalicStart() { }
	451	virtual void OnItalicEnd() { }
	452
	453	virtual void OnUnderlinedStart() { }
	454	virtual void OnUnderlinedEnd() { }
	455
	456	virtual void OnStrikethroughStart() { }
	457	virtual void OnStrikethroughEnd() { }
	458
	459	virtual void OnBigStart() { }
	460	virtual void OnBigEnd() { }
	461
	462	virtual void OnSmallStart() { }
	463	virtual void OnSmallEnd() { }
	464
	465	virtual void OnTeletypeStart() { }
	466	virtual void OnTeletypeEnd() { }
	467
	468	virtual void OnSpanStart(const wxMarkupSpanAttributes& WXUNUSED(a)) { }
	469	virtual void OnSpanEnd(const wxMarkupSpanAttributes& WXUNUSED(a)) { }
	470
	471	private:
	472	wxString m_text;
	473	};
	474
	475	StripOutput output;
	476	wxMarkupParser parser(output);
	477	if ( !parser.Parse(text) )
	478	return wxString();
	479
	480	return output.GetText();
	481	}
f5bdfc69 VZ	482
f5bdfc69 VZ	483	#endif // wxUSE_MARKUP