--- /dev/null
+/////////////////////////////////////////////////////////////////////////////
+// Name: src/html/htmltag.cpp
+// Purpose: wx28HtmlTag class (represents single tag)
+// Author: Vaclav Slavik
+// RCS-ID: $Id$
+// Copyright: (c) 1999 Vaclav Slavik
+// Licence: wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+ #pragma hdrstop
+#endif
+
+#include "htmltag.h"
+
+#ifndef WXPRECOMP
+ #include "wx/colour.h"
+#endif
+
+#include "htmlpars.h"
+#include <stdio.h> // for vsscanf
+#include <stdarg.h>
+
+
+//-----------------------------------------------------------------------------
+// wx28HtmlTagsCache
+//-----------------------------------------------------------------------------
+
+struct wx28HtmlCacheItem
+{
+ // this is "pos" value passed to wx28HtmlTag's constructor.
+ // it is position of '<' character of the tag
+ int Key;
+
+ // end positions for the tag:
+ // end1 is '<' of ending tag,
+ // end2 is '>' or both are
+ // -1 if there is no ending tag for this one...
+ // or -2 if this is ending tag </...>
+ int End1, End2;
+
+ // name of this tag
+ wxChar *Name;
+};
+
+
+IMPLEMENT_CLASS(wx28HtmlTagsCache,wxObject)
+
+#define CACHE_INCREMENT 64
+
+bool wxIsCDATAElement(const wxChar *tag)
+{
+ return (wxStrcmp(tag, _T("SCRIPT")) == 0) ||
+ (wxStrcmp(tag, _T("STYLE")) == 0);
+}
+
+wx28HtmlTagsCache::wx28HtmlTagsCache(const wxString& source)
+{
+ const wxChar *src = source.c_str();
+ int lng = source.length();
+ wxChar tagBuffer[256];
+
+ m_Cache = NULL;
+ m_CacheSize = 0;
+ m_CachePos = 0;
+
+ int pos = 0;
+ while (pos < lng)
+ {
+ if (src[pos] == wxT('<')) // tag found:
+ {
+ if (m_CacheSize % CACHE_INCREMENT == 0)
+ m_Cache = (wx28HtmlCacheItem*) realloc(m_Cache, (m_CacheSize + CACHE_INCREMENT) * sizeof(wx28HtmlCacheItem));
+ int tg = m_CacheSize++;
+ int stpos = pos++;
+ m_Cache[tg].Key = stpos;
+
+ int i;
+ for ( i = 0;
+ pos < lng && i < (int)WXSIZEOF(tagBuffer) - 1 &&
+ src[pos] != wxT('>') && !wxIsspace(src[pos]);
+ i++, pos++ )
+ {
+ tagBuffer[i] = (wxChar)wxToupper(src[pos]);
+ }
+ tagBuffer[i] = _T('\0');
+
+ m_Cache[tg].Name = new wxChar[i+1];
+ memcpy(m_Cache[tg].Name, tagBuffer, (i+1)*sizeof(wxChar));
+
+ while (pos < lng && src[pos] != wxT('>')) pos++;
+
+ if (src[stpos+1] == wxT('/')) // ending tag:
+ {
+ m_Cache[tg].End1 = m_Cache[tg].End2 = -2;
+ // find matching begin tag:
+ for (i = tg; i >= 0; i--)
+ if ((m_Cache[i].End1 == -1) && (wxStrcmp(m_Cache[i].Name, tagBuffer+1) == 0))
+ {
+ m_Cache[i].End1 = stpos;
+ m_Cache[i].End2 = pos + 1;
+ break;
+ }
+ }
+ else
+ {
+ m_Cache[tg].End1 = m_Cache[tg].End2 = -1;
+
+ if (wxIsCDATAElement(tagBuffer))
+ {
+ // store the orig pos in case we are missing the closing
+ // tag (see below)
+ wxInt32 old_pos = pos;
+ bool foundCloseTag = false;
+
+ // find next matching tag
+ int tag_len = wxStrlen(tagBuffer);
+ while (pos < lng)
+ {
+ // find the ending tag
+ while (pos + 1 < lng &&
+ (src[pos] != '<' || src[pos+1] != '/'))
+ ++pos;
+ if (src[pos] == '<')
+ ++pos;
+
+ // see if it matches
+ int match_pos = 0;
+ while (pos < lng && match_pos < tag_len && src[pos] != '>' && src[pos] != '<') {
+ // cast to wxChar needed to suppress warning in
+ // Unicode build
+ if ((wxChar)wxToupper(src[pos]) == tagBuffer[match_pos]) {
+ ++match_pos;
+ }
+ else if (src[pos] == wxT(' ') || src[pos] == wxT('\n') ||
+ src[pos] == wxT('\r') || src[pos] == wxT('\t')) {
+ // need to skip over these
+ }
+ else {
+ match_pos = 0;
+ }
+ ++pos;
+ }
+
+ // found a match
+ if (match_pos == tag_len)
+ {
+ pos = pos - tag_len - 3;
+ foundCloseTag = true;
+ break;
+ }
+ else // keep looking for the closing tag
+ {
+ ++pos;
+ }
+ }
+ if (!foundCloseTag)
+ {
+ // we didn't find closing tag; this means the markup
+ // is incorrect and the best thing we can do is to
+ // ignore the unclosed tag and continue parsing as if
+ // it didn't exist:
+ pos = old_pos;
+ }
+ }
+ }
+ }
+
+ pos++;
+ }
+
+ // ok, we're done, now we'll free .Name members of cache - we don't need it anymore:
+ for (int i = 0; i < m_CacheSize; i++)
+ {
+ delete[] m_Cache[i].Name;
+ m_Cache[i].Name = NULL;
+ }
+}
+
+void wx28HtmlTagsCache::QueryTag(int at, int* end1, int* end2)
+{
+ if (m_Cache == NULL) return;
+ if (m_Cache[m_CachePos].Key != at)
+ {
+ int delta = (at < m_Cache[m_CachePos].Key) ? -1 : 1;
+ do
+ {
+ if ( m_CachePos < 0 || m_CachePos == m_CacheSize )
+ {
+ // something is very wrong with HTML, give up by returning an
+ // impossibly large value which is going to be ignored by the
+ // caller
+ *end1 =
+ *end2 = INT_MAX;
+ return;
+ }
+
+ m_CachePos += delta;
+ }
+ while (m_Cache[m_CachePos].Key != at);
+ }
+ *end1 = m_Cache[m_CachePos].End1;
+ *end2 = m_Cache[m_CachePos].End2;
+}
+
+
+
+
+//-----------------------------------------------------------------------------
+// wx28HtmlTag
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_CLASS(wx28HtmlTag,wxObject)
+
+wx28HtmlTag::wx28HtmlTag(wx28HtmlTag *parent,
+ const wxString& source, int pos, int end_pos,
+ wx28HtmlTagsCache *cache,
+ wx28HtmlEntitiesParser *entParser) : wxObject()
+{
+ /* Setup DOM relations */
+
+ m_Next = NULL;
+ m_FirstChild = m_LastChild = NULL;
+ m_Parent = parent;
+ if (parent)
+ {
+ m_Prev = m_Parent->m_LastChild;
+ if (m_Prev == NULL)
+ m_Parent->m_FirstChild = this;
+ else
+ m_Prev->m_Next = this;
+ m_Parent->m_LastChild = this;
+ }
+ else
+ m_Prev = NULL;
+
+ /* Find parameters and their values: */
+
+ int i;
+ wxChar c;
+
+ // fill-in name, params and begin pos:
+ i = pos+1;
+
+ // find tag's name and convert it to uppercase:
+ while ((i < end_pos) &&
+ ((c = source[i++]) != wxT(' ') && c != wxT('\r') &&
+ c != wxT('\n') && c != wxT('\t') &&
+ c != wxT('>')))
+ {
+ if ((c >= wxT('a')) && (c <= wxT('z')))
+ c -= (wxT('a') - wxT('A'));
+ m_Name << c;
+ }
+
+ // if the tag has parameters, read them and "normalize" them,
+ // i.e. convert to uppercase, replace whitespaces by spaces and
+ // remove whitespaces around '=':
+ if (source[i-1] != wxT('>'))
+ {
+ #define IS_WHITE(c) (c == wxT(' ') || c == wxT('\r') || \
+ c == wxT('\n') || c == wxT('\t'))
+ wxString pname, pvalue;
+ wxChar quote;
+ enum
+ {
+ ST_BEFORE_NAME = 1,
+ ST_NAME,
+ ST_BEFORE_EQ,
+ ST_BEFORE_VALUE,
+ ST_VALUE
+ } state;
+
+ quote = 0;
+ state = ST_BEFORE_NAME;
+ while (i < end_pos)
+ {
+ c = source[i++];
+
+ if (c == wxT('>') && !(state == ST_VALUE && quote != 0))
+ {
+ if (state == ST_BEFORE_EQ || state == ST_NAME)
+ {
+ m_ParamNames.Add(pname);
+ m_ParamValues.Add(wxEmptyString);
+ }
+ else if (state == ST_VALUE && quote == 0)
+ {
+ m_ParamNames.Add(pname);
+ if (entParser)
+ m_ParamValues.Add(entParser->Parse(pvalue));
+ else
+ m_ParamValues.Add(pvalue);
+ }
+ break;
+ }
+ switch (state)
+ {
+ case ST_BEFORE_NAME:
+ if (!IS_WHITE(c))
+ {
+ pname = c;
+ state = ST_NAME;
+ }
+ break;
+ case ST_NAME:
+ if (IS_WHITE(c))
+ state = ST_BEFORE_EQ;
+ else if (c == wxT('='))
+ state = ST_BEFORE_VALUE;
+ else
+ pname << c;
+ break;
+ case ST_BEFORE_EQ:
+ if (c == wxT('='))
+ state = ST_BEFORE_VALUE;
+ else if (!IS_WHITE(c))
+ {
+ m_ParamNames.Add(pname);
+ m_ParamValues.Add(wxEmptyString);
+ pname = c;
+ state = ST_NAME;
+ }
+ break;
+ case ST_BEFORE_VALUE:
+ if (!IS_WHITE(c))
+ {
+ if (c == wxT('"') || c == wxT('\''))
+ quote = c, pvalue = wxEmptyString;
+ else
+ quote = 0, pvalue = c;
+ state = ST_VALUE;
+ }
+ break;
+ case ST_VALUE:
+ if ((quote != 0 && c == quote) ||
+ (quote == 0 && IS_WHITE(c)))
+ {
+ m_ParamNames.Add(pname);
+ if (quote == 0)
+ {
+ // VS: backward compatibility, no real reason,
+ // but wxHTML code relies on this... :(
+ pvalue.MakeUpper();
+ }
+ if (entParser)
+ m_ParamValues.Add(entParser->Parse(pvalue));
+ else
+ m_ParamValues.Add(pvalue);
+ state = ST_BEFORE_NAME;
+ }
+ else
+ pvalue << c;
+ break;
+ }
+ }
+
+ #undef IS_WHITE
+ }
+ m_Begin = i;
+
+ cache->QueryTag(pos, &m_End1, &m_End2);
+ if (m_End1 > end_pos) m_End1 = end_pos;
+ if (m_End2 > end_pos) m_End2 = end_pos;
+}
+
+wx28HtmlTag::~wx28HtmlTag()
+{
+ wx28HtmlTag *t1, *t2;
+ t1 = m_FirstChild;
+ while (t1)
+ {
+ t2 = t1->GetNextSibling();
+ delete t1;
+ t1 = t2;
+ }
+}
+
+bool wx28HtmlTag::HasParam(const wxString& par) const
+{
+ return (m_ParamNames.Index(par, false) != wxNOT_FOUND);
+}
+
+wxString wx28HtmlTag::GetParam(const wxString& par, bool with_commas) const
+{
+ int index = m_ParamNames.Index(par, false);
+ if (index == wxNOT_FOUND)
+ return wxEmptyString;
+ if (with_commas)
+ {
+ // VS: backward compatibility, seems to be never used by wxHTML...
+ wxString s;
+ s << wxT('"') << m_ParamValues[index] << wxT('"');
+ return s;
+ }
+ else
+ return m_ParamValues[index];
+}
+
+int wx28HtmlTag::ScanParam(const wxString& par,
+ const wxChar *format,
+ void *param) const
+{
+ wxString parval = GetParam(par);
+ return wxSscanf(parval, format, param);
+}
+
+bool wx28HtmlTag::GetParamAsColour(const wxString& par, wxColour *clr) const
+{
+ wxCHECK_MSG( clr, false, _T("invalid colour argument") );
+
+ wxString str = GetParam(par);
+
+ // handle colours defined in HTML 4.0 first:
+ if (str.length() > 1 && str[0] != _T('#'))
+ {
+ #define HTML_COLOUR(name, r, g, b) \
+ if (str.IsSameAs(wxT(name), false)) \
+ { clr->Set(r, g, b); return true; }
+ HTML_COLOUR("black", 0x00,0x00,0x00)
+ HTML_COLOUR("silver", 0xC0,0xC0,0xC0)
+ HTML_COLOUR("gray", 0x80,0x80,0x80)
+ HTML_COLOUR("white", 0xFF,0xFF,0xFF)
+ HTML_COLOUR("maroon", 0x80,0x00,0x00)
+ HTML_COLOUR("red", 0xFF,0x00,0x00)
+ HTML_COLOUR("purple", 0x80,0x00,0x80)
+ HTML_COLOUR("fuchsia", 0xFF,0x00,0xFF)
+ HTML_COLOUR("green", 0x00,0x80,0x00)
+ HTML_COLOUR("lime", 0x00,0xFF,0x00)
+ HTML_COLOUR("olive", 0x80,0x80,0x00)
+ HTML_COLOUR("yellow", 0xFF,0xFF,0x00)
+ HTML_COLOUR("navy", 0x00,0x00,0x80)
+ HTML_COLOUR("blue", 0x00,0x00,0xFF)
+ HTML_COLOUR("teal", 0x00,0x80,0x80)
+ HTML_COLOUR("aqua", 0x00,0xFF,0xFF)
+ #undef HTML_COLOUR
+ }
+
+ // then try to parse #rrggbb representations or set from other well
+ // known names (note that this doesn't strictly conform to HTML spec,
+ // 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 wx28HtmlTag::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 wx28HtmlTag::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;
+}
+
+wx28HtmlTag *wx28HtmlTag::GetFirstSibling() const
+{
+ if (m_Parent)
+ return m_Parent->m_FirstChild;
+ else
+ {
+ wx28HtmlTag *cur = (wx28HtmlTag*)this;
+ while (cur->m_Prev)
+ cur = cur->m_Prev;
+ return cur;
+ }
+}
+
+wx28HtmlTag *wx28HtmlTag::GetLastSibling() const
+{
+ if (m_Parent)
+ return m_Parent->m_LastChild;
+ else
+ {
+ wx28HtmlTag *cur = (wx28HtmlTag*)this;
+ while (cur->m_Next)
+ cur = cur->m_Next;
+ return cur;
+ }
+}
+
+wx28HtmlTag *wx28HtmlTag::GetNextTag() const
+{
+ if (m_FirstChild) return m_FirstChild;
+ if (m_Next) return m_Next;
+ wx28HtmlTag *cur = m_Parent;
+ if (!cur) return NULL;
+ while (cur->m_Parent && !cur->m_Next)
+ cur = cur->m_Parent;
+ return cur->m_Next;
+}
projects / wxWidgets.git / blobdiff