5e8e25e729
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@9932 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
315 lines
8.4 KiB
C++
315 lines
8.4 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: 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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#ifdef __GNUG__
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#pragma implementation
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#endif
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#include "wx/wxprec.h"
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#include "wx/defs.h"
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#if wxUSE_HTML
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#ifdef __BORDLANDC__
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#pragma hdrstop
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#endif
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#ifndef WXPRECOMP
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#include "wx/wx.h"
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#endif
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#include "wx/html/htmltag.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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int Key;
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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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// -1 if there is no ending tag for this one...
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// or -2 if this is ending tag </...>
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int End1, End2;
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// name of this tag
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wxChar *Name;
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};
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IMPLEMENT_CLASS(wxHtmlTagsCache,wxObject)
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#define CACHE_INCREMENT 64
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wxHtmlTagsCache::wxHtmlTagsCache(const wxString& source)
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{
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const wxChar *src = source.c_str();
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int i, tg, pos, stpos;
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int lng = source.Length();
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wxChar dummy[256];
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m_Cache = NULL;
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m_CacheSize = 0;
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m_CachePos = 0;
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pos = 0;
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while (pos < lng)
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{
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if (src[pos] == wxT('<')) // tag found:
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{
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if (m_CacheSize % CACHE_INCREMENT == 0)
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m_Cache = (wxHtmlCacheItem*) realloc(m_Cache, (m_CacheSize + CACHE_INCREMENT) * sizeof(wxHtmlCacheItem));
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tg = m_CacheSize++;
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m_Cache[tg].Key = stpos = pos++;
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dummy[0] = 0; i = 0;
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while (pos < lng &&
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src[pos] != wxT('>') &&
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src[pos] != wxT(' ') && src[pos] != wxT('\r') &&
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src[pos] != wxT('\n') && src[pos] != wxT('\t'))
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{
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dummy[i] = src[pos++];
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if ((dummy[i] >= wxT('a')) && (dummy[i] <= wxT('z'))) dummy[i] -= (wxT('a') - wxT('A'));
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i++;
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}
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dummy[i] = 0;
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m_Cache[tg].Name = new wxChar[i+1];
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memcpy(m_Cache[tg].Name, dummy, (i+1)*sizeof(wxChar));
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while (pos < lng && src[pos] != wxT('>')) pos++;
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if (src[stpos+1] == wxT('/')) // ending tag:
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{
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m_Cache[tg].End1 = m_Cache[tg].End2 = -2;
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// find matching begin tag:
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for (i = tg; i >= 0; i--)
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if ((m_Cache[i].End1 == -1) && (wxStrcmp(m_Cache[i].Name, dummy+1) == 0))
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{
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m_Cache[i].End1 = stpos;
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m_Cache[i].End2 = pos + 1;
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break;
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}
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}
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else
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{
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m_Cache[tg].End1 = m_Cache[tg].End2 = -1;
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}
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}
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pos++;
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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 (i = 0; i < m_CacheSize; i++)
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{
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delete[] m_Cache[i].Name;
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m_Cache[i].Name = NULL;
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}
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}
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void wxHtmlTagsCache::QueryTag(int at, int* end1, int* end2)
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{
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if (m_Cache == NULL) return;
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if (m_Cache[m_CachePos].Key != at)
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{
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int delta = (at < m_Cache[m_CachePos].Key) ? -1 : 1;
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do {m_CachePos += delta;} while (m_Cache[m_CachePos].Key != at);
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}
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*end1 = m_Cache[m_CachePos].End1;
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*end2 = m_Cache[m_CachePos].End2;
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}
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//-----------------------------------------------------------------------------
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// wxHtmlTag
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//-----------------------------------------------------------------------------
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IMPLEMENT_CLASS(wxHtmlTag,wxObject)
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wxHtmlTag::wxHtmlTag(const wxString& source, int pos, int end_pos, wxHtmlTagsCache* cache) : wxObject()
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{
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int i;
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char c;
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// fill-in name, params and begin pos:
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m_Name = m_Params = wxEmptyString;
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i = pos+1;
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if (source[i] == '/') { m_Ending = TRUE; i++; }
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else m_Ending = FALSE;
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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 = source[i++]) != ' ' && c != '\r' && c != '\n' && c != '\t' &&
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c != '>'))
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{
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if ((c >= 'a') && (c <= 'z')) c -= ('a' - '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 (source[i-1] != '>')
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while ((i < end_pos) && ((c = source[i++]) != '>'))
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{
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if ((c >= 'a') && (c <= 'z')) c -= ('a' - 'A');
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if (c == '\r' || c == '\n' || c == '\t') c = ' '; // make future parsing a bit simpler
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m_Params += c;
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if (c == '"')
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{
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// remove spaces around the '=' character:
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if (m_Params.Length() > 1 &&
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m_Params[m_Params.Length()-2] == ' ')
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{
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m_Params.RemoveLast();
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while (m_Params.Length() > 0 && m_Params.Last() == ' ')
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m_Params.RemoveLast();
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m_Params += '"';
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}
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while ((i < end_pos) && (source[i++] == ' ')) {}
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if (i < end_pos) i--;
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// ...and copy the value to m_Params:
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while ((i < end_pos) && ((c = source[i++]) != '"')) m_Params += c;
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m_Params += c;
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}
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else if (c == '\'')
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{
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while ((i < end_pos) && ((c = source[i++]) != '\'')) m_Params += c;
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m_Params += c;
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}
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}
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m_Begin = i;
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cache->QueryTag(pos, &m_End1, &m_End2);
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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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}
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bool wxHtmlTag::HasParam(const wxString& par) const
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{
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const wxChar *st = m_Params, *p = par;
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const wxChar *st2, *p2;
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if (*st == 0) return FALSE;
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if (*p == 0) return FALSE;
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for (st2 = st, p2 = p; ; st2++)
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{
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if (*p2 == 0) return TRUE;
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if (*st2 == 0) return FALSE;
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if (*p2 != *st2) p2 = p;
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if (*p2 == *st2) p2++;
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if (*st2 == ' ') p2 = p;
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else if (*st2 == '=')
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{
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p2 = p;
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while (*st2 != ' ')
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{
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if (*st2 == '"')
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{
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st2++;
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while (*st2 != '"') st2++;
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}
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st2++;
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if (*st2 == 0) return FALSE;
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}
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}
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}
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}
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wxString wxHtmlTag::GetParam(const wxString& par, bool with_commas) const
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{
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const wxChar *st = m_Params, *p = par;
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const wxChar *st2, *p2;
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bool comma;
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char comma_char;
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if (*st == 0) return "";
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if (*p == 0) return "";
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for (st2 = st, p2 = p; ; st2++)
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{
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if (*p2 == 0) // found
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{
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wxString fnd = "";
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st2++; // '=' character
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comma = FALSE;
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comma_char = '\0';
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if (!with_commas && (*(st2) == '"'))
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{
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st2++;
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comma = TRUE;
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comma_char = '"';
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}
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else if (!with_commas && (*(st2) == '\''))
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{
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st2++;
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comma = TRUE;
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comma_char = '\'';
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}
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while (*st2 != 0)
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{
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if (comma && *st2 == comma_char) comma = FALSE;
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else if ((*st2 == ' ') && (!comma)) break;
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fnd += (*(st2++));
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}
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if (!with_commas && (*(st2-1) == comma_char)) fnd.RemoveLast();
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return fnd;
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}
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if (*st2 == 0) return "";
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if (*p2 != *st2) p2 = p;
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if (*p2 == *st2) p2++;
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if (*st2 == ' ') p2 = p;
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else if (*st2 == '=')
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{
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p2 = p;
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while (*st2 != ' ')
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{
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if (*st2 == '"')
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{
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st2++;
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while (*st2 != '"') st2++;
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}
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else if (*st2 == '\'')
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{
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st2++;
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while (*st2 != '\'') st2++;
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}
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st2++;
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}
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}
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}
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}
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int wxHtmlTag::ScanParam(const wxString& par, wxChar *format, void *param) const
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{
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wxString parval = GetParam(par);
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return wxSscanf((const wxChar*)parval, format, param);
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}
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#endif
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