5276b0a53c
Use wxDELETE[A]() functions which automatically NULL out their arguments after deleting them instead of doing it manually. Closes #9685. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@64656 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
626 lines
19 KiB
C++
626 lines
19 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: src/html/htmltag.cpp
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// Purpose: wxHtmlTag class (represents single tag)
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// Author: Vaclav Slavik
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// RCS-ID: $Id$
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// Copyright: (c) 1999 Vaclav Slavik
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#if wxUSE_HTML
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#include "wx/html/htmltag.h"
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#ifndef WX_PRECOMP
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#include "wx/colour.h"
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#include "wx/wxcrtvararg.h"
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#endif
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#include "wx/html/htmlpars.h"
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#include "wx/html/styleparams.h"
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#include "wx/vector.h"
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#include <stdio.h> // for vsscanf
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#include <stdarg.h>
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//-----------------------------------------------------------------------------
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// wxHtmlTagsCache
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//-----------------------------------------------------------------------------
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struct wxHtmlCacheItem
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{
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// this is "pos" value passed to wxHtmlTag's constructor.
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// it is position of '<' character of the tag
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wxString::const_iterator Key;
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// Tag type
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enum Type
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{
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Type_Normal, // normal tag with a matching ending tag
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Type_NoMatchingEndingTag, // there's no ending tag for this tag
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Type_EndingTag // this is ending tag </..>
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};
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Type type;
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// end positions for the tag:
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// end1 is '<' of ending tag,
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// end2 is '>' or both are
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wxString::const_iterator End1, End2;
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// name of this tag
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wxChar *Name;
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};
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// NB: this is an empty class and not typedef because of forward declaration
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class wxHtmlTagsCacheData : public wxVector<wxHtmlCacheItem>
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{
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};
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bool wxIsCDATAElement(const wxChar *tag)
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{
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return (wxStrcmp(tag, wxT("SCRIPT")) == 0) ||
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(wxStrcmp(tag, wxT("STYLE")) == 0);
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}
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bool wxIsCDATAElement(const wxString& tag)
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{
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return (wxStrcmp(tag.wx_str(), wxS("SCRIPT")) == 0) ||
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(wxStrcmp(tag.wx_str(), wxS("STYLE")) == 0);
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}
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wxHtmlTagsCache::wxHtmlTagsCache(const wxString& source)
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{
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m_Cache = new wxHtmlTagsCacheData;
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m_CachePos = 0;
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wxChar tagBuffer[256];
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const wxString::const_iterator end = source.end();
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for ( wxString::const_iterator pos = source.begin(); pos < end; ++pos )
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{
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if (*pos == wxT('<')) // tag found:
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{
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// don't cache comment tags
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if ( wxHtmlParser::SkipCommentTag(pos, source.end()) )
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continue;
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size_t tg = Cache().size();
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Cache().push_back(wxHtmlCacheItem());
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wxString::const_iterator stpos = pos++;
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Cache()[tg].Key = stpos;
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int i;
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for ( i = 0;
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pos < end && i < (int)WXSIZEOF(tagBuffer) - 1 &&
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*pos != wxT('>') && !wxIsspace(*pos);
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++i, ++pos )
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{
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tagBuffer[i] = (wxChar)wxToupper(*pos);
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}
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tagBuffer[i] = wxT('\0');
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Cache()[tg].Name = new wxChar[i+1];
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memcpy(Cache()[tg].Name, tagBuffer, (i+1)*sizeof(wxChar));
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while (pos < end && *pos != wxT('>'))
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++pos;
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if ((stpos+1) < end && *(stpos+1) == wxT('/')) // ending tag:
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{
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Cache()[tg].type = wxHtmlCacheItem::Type_EndingTag;
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// find matching begin tag:
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for (i = tg; i >= 0; i--)
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{
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if ((Cache()[i].type == wxHtmlCacheItem::Type_NoMatchingEndingTag) && (wxStrcmp(Cache()[i].Name, tagBuffer+1) == 0))
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{
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Cache()[i].type = wxHtmlCacheItem::Type_Normal;
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Cache()[i].End1 = stpos;
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Cache()[i].End2 = pos + 1;
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break;
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}
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}
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}
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else
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{
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Cache()[tg].type = wxHtmlCacheItem::Type_NoMatchingEndingTag;
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if (wxIsCDATAElement(tagBuffer))
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{
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// store the orig pos in case we are missing the closing
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// tag (see below)
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const wxString::const_iterator old_pos = pos;
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bool foundCloseTag = false;
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// find next matching tag
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int tag_len = wxStrlen(tagBuffer);
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while (pos < end)
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{
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// find the ending tag
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while (pos + 1 < end &&
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(*pos != '<' || *(pos+1) != '/'))
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++pos;
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if (*pos == '<')
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++pos;
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// see if it matches
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int match_pos = 0;
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while (pos < end && match_pos < tag_len )
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{
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wxChar c = *pos;
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if ( c == '>' || c == '<' )
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break;
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// cast to wxChar needed to suppress warning in
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// Unicode build
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if ((wxChar)wxToupper(c) == tagBuffer[match_pos])
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{
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++match_pos;
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}
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else if (c == wxT(' ') || c == wxT('\n') ||
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c == wxT('\r') || c == wxT('\t'))
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{
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// need to skip over these
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}
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else
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{
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match_pos = 0;
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}
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++pos;
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}
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// found a match
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if (match_pos == tag_len)
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{
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pos = pos - tag_len - 3;
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foundCloseTag = true;
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break;
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}
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else // keep looking for the closing tag
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{
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++pos;
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}
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}
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if (!foundCloseTag)
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{
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// we didn't find closing tag; this means the markup
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// is incorrect and the best thing we can do is to
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// ignore the unclosed tag and continue parsing as if
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// it didn't exist:
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pos = old_pos;
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}
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}
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}
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}
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}
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// ok, we're done, now we'll free .Name members of cache - we don't need it anymore:
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for ( wxHtmlTagsCacheData::iterator i = Cache().begin();
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i != Cache().end(); ++i )
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{
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wxDELETEA(i->Name);
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}
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}
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wxHtmlTagsCache::~wxHtmlTagsCache()
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{
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delete m_Cache;
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}
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void wxHtmlTagsCache::QueryTag(const wxString::const_iterator& at,
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const wxString::const_iterator& inputEnd,
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wxString::const_iterator *end1,
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wxString::const_iterator *end2,
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bool *hasEnding)
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{
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if (Cache().empty())
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return;
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if (Cache()[m_CachePos].Key != at)
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{
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int delta = (at < Cache()[m_CachePos].Key) ? -1 : 1;
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do
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{
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m_CachePos += delta;
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if ( m_CachePos < 0 || m_CachePos >= (int)Cache().size() )
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{
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if ( m_CachePos < 0 )
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m_CachePos = 0;
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else
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m_CachePos = Cache().size() - 1;
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// something is very wrong with HTML, give up by returning an
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// impossibly large value which is going to be ignored by the
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// caller
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*end1 =
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*end2 = inputEnd;
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*hasEnding = true;
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return;
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}
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}
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while (Cache()[m_CachePos].Key != at);
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}
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switch ( Cache()[m_CachePos].type )
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{
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case wxHtmlCacheItem::Type_Normal:
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*end1 = Cache()[m_CachePos].End1;
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*end2 = Cache()[m_CachePos].End2;
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*hasEnding = true;
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break;
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case wxHtmlCacheItem::Type_EndingTag:
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wxFAIL_MSG("QueryTag called for ending tag - can't be");
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// but if it does happen, fall through, better than crashing
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case wxHtmlCacheItem::Type_NoMatchingEndingTag:
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// If input HTML is invalid and there's no closing tag for this
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// one, pretend that it runs all the way to the end of input
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*end1 = inputEnd;
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*end2 = inputEnd;
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*hasEnding = false;
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break;
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}
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}
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//-----------------------------------------------------------------------------
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// wxHtmlTag
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//-----------------------------------------------------------------------------
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wxHtmlTag::wxHtmlTag(wxHtmlTag *parent,
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const wxString *source,
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const wxString::const_iterator& pos,
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const wxString::const_iterator& end_pos,
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wxHtmlTagsCache *cache,
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wxHtmlEntitiesParser *entParser)
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{
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/* Setup DOM relations */
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m_Next = NULL;
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m_FirstChild = m_LastChild = NULL;
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m_Parent = parent;
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if (parent)
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{
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m_Prev = m_Parent->m_LastChild;
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if (m_Prev == NULL)
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m_Parent->m_FirstChild = this;
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else
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m_Prev->m_Next = this;
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m_Parent->m_LastChild = this;
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}
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else
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m_Prev = NULL;
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/* Find parameters and their values: */
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wxChar c wxDUMMY_INITIALIZE(0);
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// fill-in name, params and begin pos:
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wxString::const_iterator i(pos+1);
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// find tag's name and convert it to uppercase:
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while ((i < end_pos) &&
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((c = *(i++)) != wxT(' ') && c != wxT('\r') &&
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c != wxT('\n') && c != wxT('\t') &&
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c != wxT('>') && c != wxT('/')))
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{
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if ((c >= wxT('a')) && (c <= wxT('z')))
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c -= (wxT('a') - wxT('A'));
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m_Name << c;
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}
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// if the tag has parameters, read them and "normalize" them,
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// i.e. convert to uppercase, replace whitespaces by spaces and
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// remove whitespaces around '=':
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if (*(i-1) != wxT('>'))
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{
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#define IS_WHITE(c) (c == wxT(' ') || c == wxT('\r') || \
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c == wxT('\n') || c == wxT('\t'))
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wxString pname, pvalue;
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wxChar quote;
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enum
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{
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ST_BEFORE_NAME = 1,
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ST_NAME,
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ST_BEFORE_EQ,
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ST_BEFORE_VALUE,
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ST_VALUE
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} state;
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quote = 0;
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state = ST_BEFORE_NAME;
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while (i < end_pos)
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{
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c = *(i++);
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if (c == wxT('>') && !(state == ST_VALUE && quote != 0))
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{
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if (state == ST_BEFORE_EQ || state == ST_NAME)
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{
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m_ParamNames.Add(pname);
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m_ParamValues.Add(wxGetEmptyString());
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}
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else if (state == ST_VALUE && quote == 0)
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{
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m_ParamNames.Add(pname);
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if (entParser)
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m_ParamValues.Add(entParser->Parse(pvalue));
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else
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m_ParamValues.Add(pvalue);
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}
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break;
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}
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switch (state)
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{
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case ST_BEFORE_NAME:
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if (!IS_WHITE(c))
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{
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pname = c;
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state = ST_NAME;
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}
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break;
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case ST_NAME:
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if (IS_WHITE(c))
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state = ST_BEFORE_EQ;
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else if (c == wxT('='))
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state = ST_BEFORE_VALUE;
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else
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pname << c;
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break;
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case ST_BEFORE_EQ:
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if (c == wxT('='))
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state = ST_BEFORE_VALUE;
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else if (!IS_WHITE(c))
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{
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m_ParamNames.Add(pname);
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m_ParamValues.Add(wxGetEmptyString());
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pname = c;
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state = ST_NAME;
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}
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break;
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case ST_BEFORE_VALUE:
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if (!IS_WHITE(c))
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{
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if (c == wxT('"') || c == wxT('\''))
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quote = c, pvalue = wxGetEmptyString();
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else
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quote = 0, pvalue = c;
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state = ST_VALUE;
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}
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break;
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case ST_VALUE:
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if ((quote != 0 && c == quote) ||
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(quote == 0 && IS_WHITE(c)))
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{
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m_ParamNames.Add(pname);
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if (quote == 0)
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{
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// VS: backward compatibility, no real reason,
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// but wxHTML code relies on this... :(
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pvalue.MakeUpper();
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}
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if (entParser)
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m_ParamValues.Add(entParser->Parse(pvalue));
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else
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m_ParamValues.Add(pvalue);
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state = ST_BEFORE_NAME;
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}
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else
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pvalue << c;
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break;
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}
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}
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#undef IS_WHITE
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}
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m_Begin = i;
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cache->QueryTag(pos, source->end(), &m_End1, &m_End2, &m_hasEnding);
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if (m_End1 > end_pos) m_End1 = end_pos;
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if (m_End2 > end_pos) m_End2 = end_pos;
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#if WXWIN_COMPATIBILITY_2_8
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m_sourceStart = source->begin();
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#endif
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// Try to parse any style parameters that can be handled simply by
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// converting them to the equivalent HTML 3 attributes: this is a far cry
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// from perfect but better than nothing.
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static const struct EquivAttr
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{
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const char *style;
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const char *attr;
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} equivAttrs[] =
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{
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{ "text-align", "ALIGN" },
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{ "width", "WIDTH" },
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{ "vertical-align", "VALIGN" },
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{ "background", "BGCOLOR" },
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};
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wxHtmlStyleParams styleParams(*this);
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for ( unsigned n = 0; n < WXSIZEOF(equivAttrs); n++ )
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{
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const EquivAttr& ea = equivAttrs[n];
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if ( styleParams.HasParam(ea.style) && !HasParam(ea.attr) )
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{
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m_ParamNames.Add(ea.attr);
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m_ParamValues.Add(styleParams.GetParam(ea.style));
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}
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}
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}
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wxHtmlTag::~wxHtmlTag()
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{
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wxHtmlTag *t1, *t2;
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t1 = m_FirstChild;
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while (t1)
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{
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t2 = t1->GetNextSibling();
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delete t1;
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t1 = t2;
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}
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}
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bool wxHtmlTag::HasParam(const wxString& par) const
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{
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return (m_ParamNames.Index(par, false) != wxNOT_FOUND);
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}
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wxString wxHtmlTag::GetParam(const wxString& par, bool with_quotes) const
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{
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int index = m_ParamNames.Index(par, false);
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if (index == wxNOT_FOUND)
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return wxGetEmptyString();
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if (with_quotes)
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{
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// VS: backward compatibility, seems to be never used by wxHTML...
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wxString s;
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s << wxT('"') << m_ParamValues[index] << wxT('"');
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return s;
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}
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else
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return m_ParamValues[index];
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}
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int wxHtmlTag::ScanParam(const wxString& par,
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const char *format,
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void *param) const
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{
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wxString parval = GetParam(par);
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return wxSscanf(parval, format, param);
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}
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int wxHtmlTag::ScanParam(const wxString& par,
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const wchar_t *format,
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void *param) const
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{
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wxString parval = GetParam(par);
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return wxSscanf(parval, format, param);
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}
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/* static */
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bool wxHtmlTag::ParseAsColour(const wxString& str, wxColour *clr)
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{
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wxCHECK_MSG( clr, false, wxT("invalid colour argument") );
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// handle colours defined in HTML 4.0 first:
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if (str.length() > 1 && str[0] != wxT('#'))
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{
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#define HTML_COLOUR(name, r, g, b) \
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if (str.IsSameAs(wxS(name), false)) \
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{ clr->Set(r, g, b); return true; }
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HTML_COLOUR("black", 0x00,0x00,0x00)
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HTML_COLOUR("silver", 0xC0,0xC0,0xC0)
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HTML_COLOUR("gray", 0x80,0x80,0x80)
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HTML_COLOUR("white", 0xFF,0xFF,0xFF)
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HTML_COLOUR("maroon", 0x80,0x00,0x00)
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HTML_COLOUR("red", 0xFF,0x00,0x00)
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HTML_COLOUR("purple", 0x80,0x00,0x80)
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HTML_COLOUR("fuchsia", 0xFF,0x00,0xFF)
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HTML_COLOUR("green", 0x00,0x80,0x00)
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HTML_COLOUR("lime", 0x00,0xFF,0x00)
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HTML_COLOUR("olive", 0x80,0x80,0x00)
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HTML_COLOUR("yellow", 0xFF,0xFF,0x00)
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HTML_COLOUR("navy", 0x00,0x00,0x80)
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HTML_COLOUR("blue", 0x00,0x00,0xFF)
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HTML_COLOUR("teal", 0x00,0x80,0x80)
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HTML_COLOUR("aqua", 0x00,0xFF,0xFF)
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#undef HTML_COLOUR
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}
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// then try to parse #rrggbb representations or set from other well
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// known names (note that this doesn't strictly conform to HTML spec,
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// but it doesn't do real harm -- but it *must* be done after the standard
|
|
// colors are handled above):
|
|
if (clr->Set(str))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
bool wxHtmlTag::GetParamAsColour(const wxString& par, wxColour *clr) const
|
|
{
|
|
const wxString str = GetParam(par);
|
|
return !str.empty() && ParseAsColour(str, clr);
|
|
}
|
|
|
|
bool wxHtmlTag::GetParamAsInt(const wxString& par, int *clr) const
|
|
{
|
|
if ( !HasParam(par) )
|
|
return false;
|
|
|
|
long i;
|
|
if ( !GetParam(par).ToLong(&i) )
|
|
return false;
|
|
|
|
*clr = (int)i;
|
|
return true;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
#endif
|