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

///////////////////////////////////////////////////////////////////////////////
// Name:        src/common/markupparser.cpp
// Purpose:     Implementation of wxMarkupParser.
// Author:      Vadim Zeitlin
// Created:     2011-02-16
// RCS-ID:      $Id: $
// 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

#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;
                wxString rest;
                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();
                    }

                    // Remember the tag starting position for the error
                    // messages.
                    const size_t pos = it - text.begin();

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