// Name: htmltag.cpp
// Purpose: wxHtmlTag class (represents single tag)
// Author: Vaclav Slavik
+// RCS-ID: $Id$
// Copyright: (c) 1999 Vaclav Slavik
-// Licence: wxWindows Licence
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-
-#ifdef __GNUG__
-#pragma implementation
-#endif
-
-#include <wx/wxprec.h>
+#include "wx/wxprec.h"
#include "wx/defs.h"
#if wxUSE_HTML
-#ifdef __BORDLANDC__
+#ifdef __BORLANDC__
#pragma hdrstop
#endif
#ifndef WXPRECOMP
-#include <wx/wx.h>
#endif
-#include <wx/html/htmltag.h>
+#include "wx/html/htmltag.h"
+#include "wx/html/htmlpars.h"
+#include "wx/colour.h"
#include <stdio.h> // for vsscanf
#include <stdarg.h>
-
-
//-----------------------------------------------------------------------------
// wxHtmlTagsCache
//-----------------------------------------------------------------------------
+struct wxHtmlCacheItem
+{
+ // this is "pos" value passed to wxHtmlTag'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(wxHtmlTagsCache,wxObject)
#define CACHE_INCREMENT 64
+bool wxIsCDATAElement(const wxChar *tag)
+{
+ return (wxStrcmp(tag, _T("SCRIPT")) == 0) ||
+ (wxStrcmp(tag, _T("STYLE")) == 0);
+}
+
wxHtmlTagsCache::wxHtmlTagsCache(const wxString& source)
{
- const char *src = source.c_str();
- int i, tg, pos, stpos;
+ const wxChar *src = source.c_str();
int lng = source.Length();
- char dummy[256];
+ wxChar tagBuffer[256];
m_Cache = NULL;
m_CacheSize = 0;
m_CachePos = 0;
- pos = 0;
- while (pos < lng) {
- if (src[pos] == '<') { // tag found:
+ int pos = 0;
+ while (pos < lng)
+ {
+ if (src[pos] == wxT('<')) // tag found:
+ {
if (m_CacheSize % CACHE_INCREMENT == 0)
- m_Cache = (sCacheItem*) realloc(m_Cache, (m_CacheSize + CACHE_INCREMENT) * sizeof(sCacheItem));
- tg = m_CacheSize++;
- m_Cache[tg].Key = stpos = pos++;
- dummy[0] = 0; i = 0;
- while ((src[pos] != '>') && (src[pos] != ' ')) {
- dummy[i] = src[pos++];
- if ((dummy[i] >= 'a') && (dummy[i] <= 'z')) dummy[i] -= ('a' - 'A');
- i++;
+ m_Cache = (wxHtmlCacheItem*) realloc(m_Cache, (m_CacheSize + CACHE_INCREMENT) * sizeof(wxHtmlCacheItem));
+ 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]);
}
- dummy[i] = 0;
- m_Cache[tg].Name = (char*) malloc(i+1);
- memcpy(m_Cache[tg].Name, dummy, i+1);
+ tagBuffer[i] = _T('\0');
+
+ m_Cache[tg].Name = new wxChar[i+1];
+ memcpy(m_Cache[tg].Name, tagBuffer, (i+1)*sizeof(wxChar));
- while (src[pos] != '>') pos++;
+ while (pos < lng && src[pos] != wxT('>')) pos++;
- if (src[stpos+1] == '/') { // ending tag:
+ 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) && (strcmp(m_Cache[i].Name, dummy+1) == 0)) {
+ 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 {
+ 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;
+ }
+ }
}
}
}
// ok, we're done, now we'll free .Name members of cache - we don't need it anymore:
- for (i = 0; i < m_CacheSize; i++) {
- free(m_Cache[i].Name);
+ for (int i = 0; i < m_CacheSize; i++)
+ {
+ delete[] m_Cache[i].Name;
m_Cache[i].Name = NULL;
}
}
-
-
void wxHtmlTagsCache::QueryTag(int at, int* end1, int* end2)
{
if (m_Cache == NULL) return;
- if (m_Cache[m_CachePos].Key != at) {
+ if (m_Cache[m_CachePos].Key != at)
+ {
int delta = (at < m_Cache[m_CachePos].Key) ? -1 : 1;
- do {m_CachePos += delta;} while (m_Cache[m_CachePos].Key != at);
+ 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;
IMPLEMENT_CLASS(wxHtmlTag,wxObject)
-wxHtmlTag::wxHtmlTag(const wxString& source, int pos, int end_pos, wxHtmlTagsCache* cache) : wxObject()
+wxHtmlTag::wxHtmlTag(wxHtmlTag *parent,
+ const wxString& source, int pos, int end_pos,
+ wxHtmlTagsCache *cache,
+ wxHtmlEntitiesParser *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;
- char c;
+ wxChar c;
// fill-in name, params and begin pos:
- m_Name = m_Params = wxEmptyString;
i = pos+1;
- if (source[i] == '/') {m_Ending = TRUE; i++;}
- else m_Ending = FALSE;
- while ((i < end_pos) && ((c = source[i++]) != ' ') && (c != '>')) {
- if ((c >= 'a') && (c <= 'z')) c -= ('a' - 'A');
- m_Name += c;
+ // 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 (source[i-1] != '>')
- while ((i < end_pos) && ((c = source[i++]) != '>')) {
- if ((c >= 'a') && (c <= 'z')) c -= ('a' - 'A');
- m_Params += c;
- if (c == '"') {
- while ((i < end_pos) && ((c = source[i++]) != '"')) m_Params += c;
- m_Params += 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;
}
}
- 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;
-}
+ #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;
+}
-bool wxHtmlTag::HasParam(const wxString& par) const
+wxHtmlTag::~wxHtmlTag()
{
- const char *st = m_Params, *p = par;
- const char *st2, *p2;
-
- if (*st == 0) return FALSE;
- if (*p == 0) return FALSE;
- for (st2 = st, p2 = p; ; st2++) {
- if (*p2 == 0) return TRUE;
- if (*st2 == 0) return FALSE;
- if (*p2 != *st2) p2 = p;
- if (*p2 == *st2) p2++;
- if (*st2 == ' ') p2 = p;
- else if (*st2 == '=') {
- p2 = p;
- while (*st2 != ' ') {
- if (*st2 == '"') {
- st2++;
- while (*st2 != '"') st2++;
- }
- st2++;
- if (*st2 == 0) return FALSE;
- }
- }
+ wxHtmlTag *t1, *t2;
+ t1 = m_FirstChild;
+ while (t1)
+ {
+ t2 = t1->GetNextSibling();
+ delete t1;
+ t1 = t2;
}
}
-
+bool wxHtmlTag::HasParam(const wxString& par) const
+{
+ return (m_ParamNames.Index(par, false) != wxNOT_FOUND);
+}
wxString wxHtmlTag::GetParam(const wxString& par, bool with_commas) const
{
- const char *st = m_Params, *p = par;
- const char *st2, *p2;
- bool comma;
-
- if (*st == 0) return "";
- if (*p == 0) return "";
- for (st2 = st, p2 = p; ; st2++) {
- if (*p2 == 0) { // found
- wxString fnd = "";
- st2++; // '=' character
- comma = FALSE;
- if (!with_commas && (*(st2) == '"')) {st2++; comma = TRUE;}
- while (*st2 != 0) {
- if (*st2 == '"') comma = !comma;
- else if ((*st2 == ' ') && (!comma)) break;
- fnd += (*(st2++));
- }
- if (!with_commas && (*(st2-1) == '"')) fnd.RemoveLast();
- return fnd;
- }
- if (*st2 == 0) return "";
- if (*p2 != *st2) p2 = p;
- if (*p2 == *st2) p2++;
- if (*st2 == ' ') p2 = p;
- else if (*st2 == '=') {
- p2 = p;
- while (*st2 != ' ') {
- if (*st2 == '"') {
- st2++;
- while (*st2 != '"') st2++;
- }
- st2++;
- }
- }
+ 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 wxHtmlTag::ScanParam(const wxString& par,
+ const wxChar *format,
+ void *param) const
+{
+ wxString parval = GetParam(par);
+ return wxSscanf(parval, format, param);
+}
+bool wxHtmlTag::GetParamAsColour(const wxString& par, wxColour *clr) const
+{
+ wxString str = GetParam(par);
+
+ if (str.empty()) return false;
+ if (str.GetChar(0) == wxT('#'))
+ {
+ unsigned long tmp;
+ if (ScanParam(par, wxT("#%lX"), &tmp) != 1)
+ return false;
+ *clr = wxColour((unsigned char)((tmp & 0xFF0000) >> 16),
+ (unsigned char)((tmp & 0x00FF00) >> 8),
+ (unsigned char)(tmp & 0x0000FF));
+ return true;
+ }
+ else
+ {
+ // Handle colours defined in HTML 4.0:
+ #define HTML_COLOUR(name,r,g,b) \
+ if (str.IsSameAs(wxT(name), false)) \
+ { *clr = wxColour(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
+ }
+
+ return false;
+}
-void wxHtmlTag::ScanParam(const wxString& par, char *format, ...) const
+bool wxHtmlTag::GetParamAsInt(const wxString& par, int *clr) const
{
- va_list argptr;
- wxString parval = GetParam(par);
+ if (!HasParam(par)) return false;
+ long i;
+ bool succ = GetParam(par).ToLong(&i);
+ *clr = (int)i;
+ return succ;
+}
- va_start(argptr, format);
+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;
+}
-//#if defined(__MINGW32__) || defined(__CYGWIN__) || defined(__VISUALC__)
-#ifndef HAVE_VSSCANF
- sscanf((const char*)parval, format, va_arg(argptr, void *));
-#else
- vsscanf((const char*)parval, format, argptr);
-#endif
+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;
+ }
+}
-/*
- --- vsscanf is not defined under Cygwin or Mingw32 or M$ Visual C++ environment
- if this module doesn't compile with your compiler,
- modify the def statement and let me know. Thanks...
-
- So far wxHtml functions are scanning only _one_ value
- so I workarounded this by supposing that there is only
- one ...-parameter
-*/
-
- va_end(argptr);
+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
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