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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2963 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Václav Slavík
248
src/html/htmltag.cpp
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248
src/html/htmltag.cpp
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/////////////////////////////////////////////////////////////////////////////
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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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// 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 <stdarg.h>
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//-----------------------------------------------------------------------------
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// wxHtmlTagsCache
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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 char *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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char 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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if (src[pos] == '<') { // tag found:
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if (m_CacheSize % CACHE_INCREMENT == 0)
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m_Cache = (sCacheItem*) realloc(m_Cache, (m_CacheSize + CACHE_INCREMENT) * sizeof(sCacheItem));
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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 ((src[pos] != '>') && (src[pos] != ' ')) {
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dummy[i] = src[pos++];
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if ((dummy[i] >= 'a') && (dummy[i] <= 'z')) dummy[i] -= ('a' - '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 = (char*) malloc(i+1);
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memcpy(m_Cache[tg].Name, dummy, i+1);
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while (src[pos] != '>') pos++;
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if (src[stpos+1] == '/') { // ending tag:
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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) && (strcmp(m_Cache[i].Name, dummy+1) == 0)) {
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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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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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free(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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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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while ((i < end_pos) && ((c = source[i++]) != ' ') && (c != '>')) {
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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 (source[i-1] != '>')
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while ((i < end_pos) && ((c = source[i++]) != '>')) {
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if ((c >= 'a') && (c <= 'z')) c -= ('a' - 'A');
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m_Params += c;
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if (c == '"') {
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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 char *st = m_Params, *p = par;
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const char *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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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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p2 = p;
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while (*st2 != ' ') {
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if (*st2 == '"') {
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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 char *st = m_Params, *p = par;
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const char *st2, *p2;
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bool comma;
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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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if (*p2 == 0) { // found
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wxString fnd = "";
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st2++; // '=' character
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comma = FALSE;
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if (!with_commas && (*(st2) == '"')) {st2++; comma = TRUE;}
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while (*st2 != 0) {
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if (*st2 == '"') comma = !comma;
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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) == '"')) 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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p2 = p;
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while (*st2 != ' ') {
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if (*st2 == '"') {
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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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void wxHtmlTag::ScanParam(const wxString& par, char *format, ...) const
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{
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va_list argptr;
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wxString parval = GetParam(par);
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va_start(argptr, format);
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#if defined(__MINGW32__) || defined(__CYGWIN__) || defined(__VISUALC__)
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sscanf((const char*)parval, format, va_arg(argptr, void *));
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#else
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vsscanf((const char*)parval, format, argptr);
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#endif
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/*
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--- vsscanf is not defined under Cygwin or Mingw32 or M$ Visual C++ environment
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if this module doesn't compile with your compiler,
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modify the def statement and let me know. Thanks...
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So far wxHtml functions are scanning only _one_ value
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so I workarounded this by supposing that there is only
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one ...-parameter
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*/
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va_end(argptr);
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}
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#endif
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