xml-copy-editor-code/src/xmlctrl.cpp

#include "xmlctrl.h"
#include "xmlpromptgenerator.h"
#include "xmlshallowvalidator.h"
#include "xmlencodinghandler.h"
#include <utility>

// adapted from wxSTEdit (c) 2005 John Labenski, Otto Wyss
#define XMLCTRL_HASBIT(value, bit) (((value) & (bit)) != 0)

BEGIN_EVENT_TABLE(XmlCtrl, wxStyledTextCtrl)
  EVT_CHAR(XmlCtrl::OnChar)
  EVT_KEY_DOWN(XmlCtrl::OnKeyPressed)
  EVT_IDLE(XmlCtrl::OnIdle)
  EVT_STC_MARGINCLICK(wxID_ANY, XmlCtrl::OnMarginClick)
  EVT_LEFT_DOWN(XmlCtrl::OnMouseLeftDown)
  EVT_LEFT_UP(XmlCtrl::OnMouseLeftUp)
  EVT_RIGHT_UP(XmlCtrl::OnMouseRightUp)
  EVT_MIDDLE_DOWN(XmlCtrl::OnMiddleDown)
END_EVENT_TABLE()

XmlCtrl::XmlCtrl(
  wxWindow *parent,
  XmlCtrlProperties propertiesParameter,
  bool *protectTagsParameter,
  int visibilityStateParameter,
  int typeParameter,
  wxWindowID id,
  const char *buffer, // could be NULL
  size_t bufferLen,
  const std::string& catalogPathParameter,
  const std::string& basePathParameter,
  const std::string& auxPathParameter,
  const wxPoint& position,
  const wxSize& size,
  long style) : wxStyledTextCtrl(parent, id, position, size, style), 
    type(typeParameter),
    protectTags(protectTagsParameter),
    visibilityState(visibilityStateParameter),
    catalogPath(catalogPathParameter),
    basePath(basePathParameter),
    auxPath(auxPathParameter)
{
  SetEOLMode(wxSTC_EOL_LF);
  SetPasteConvertEndings(true); // essential to avoid double-spaced paste

  currentMaxLine = 1;
  validationRequired = dtdFound = false;

  applyProperties(propertiesParameter);

  SetTabWidth(2);
  SetWrapStartIndent(2);
  SetWrapVisualFlags(wxSTC_WRAPVISUALFLAG_START);
  SetUseTabs(false);
  SetBackSpaceUnIndents(true);
  SetTabIndents(false);
  SetUndoCollection(false);

  // handle NULL buffer
  if (!buffer)
  {
    buffer = DEFAULT_XML_DECLARATION_UTF8;
    bufferLen = strlen(DEFAULT_XML_DECLARATION_UTF8);
  }

  SendMsg(2001, bufferLen, (long)(const char *)buffer);

  SetSelection(0, 0);

  // position cursor
  if (type == FILE_TYPE_XML &&
    bufferLen > 5 &&
    buffer[0] == '<' &&
    buffer[1] == '?' &&
    buffer[2] == 'x' &&
    buffer[3] == 'm' &&
    buffer[4] == 'l' &&
    GetLineCount() > 1)
  {
    GotoLine(1); // == line 2 of the document
  }

  
  SetSavePoint();
  SetUndoCollection(true);
  AutoCompSetSeparator('<');

  applyVisibilityState(visibilityState);
  lineBackgroundState = BACKGROUND_STATE_NORMAL;

  for (int i = 0; i < wxSTC_INDIC_MAX; ++i) // start from 1 to disable faulty default indication
    IndicatorSetStyle(i, wxSTC_INDIC_HIDDEN);
  IndicatorSetStyle(2, wxSTC_INDIC_SQUIGGLE);
  IndicatorSetForeground(0, *wxRED);
}

// taken from wxStyledNotebook (c) Eran Ifrah <eranif@bezeqint.net>
static wxColor LightColour(const wxColour& color, int percent)
{
	int rd, gd, bd, high = 0;
	wxColor end_color = wxT("WHITE");
	rd = end_color.Red() - color.Red();
	gd = end_color.Green() - color.Green();
	bd = end_color.Blue() - color.Blue();
	high = 100;

	// We take the percent way of the color from color --> white
	int i = percent;
	int r = color.Red() +  ((i*rd*100)/high)/100;
	int g = color.Green() + ((i*gd*100)/high)/100;
	int b = color.Blue() + ((i*bd*100)/high)/100;
	return wxColor(r, g, b);
}

void XmlCtrl::OnIdle(wxIdleEvent& event)
{
  if (properties.number && type != FILE_TYPE_BINARY)
    adjustNoColumnWidth(); 
}

void XmlCtrl::OnChar(wxKeyEvent& event)
{
  if (*protectTags)
  {
    SetOvertype(false);
    if (GetSelectionStart() != GetSelectionEnd())
      adjustSelection();
    if (!canInsertAt(GetCurrentPos()))
      adjustPosRight();
  }

  if ((!properties.completion || GetOvertype()) &&
    !*protectTags)
  {
	 	 event.Skip();
	 	 return;
	}

  switch (event.GetKeyCode())
  {
    case '<':
      handleOpenAngleBracket(event);
      return;
    case '>':
      handleCloseAngleBracket(event);
      return;
    case ' ':
      handleSpace(event);
      return;
    case '=':
      handleEquals(event);
      return;
    case '&':
      handleAmpersand(event);
      return;
    case '/':
      handleForwardSlash(event);
      return;
    default:
      break;
  }
  event.Skip();
}

void XmlCtrl::handleBackspace(wxKeyEvent& event)
{
  protectHeadLine();

  validationRequired = true;

  if (canMoveLeftAt(GetCurrentPos()))
  {
    event.Skip();
    return;
  }

  int currentPos, limitPos;
  currentPos = GetCurrentPos();
  if (currentPos < 1)
    return;

  limitPos = currentPos - 1;

  // tag
  int limitStyle = getLexerStyleAt(limitPos);
  //limitStyle &= ~wxSTC_INDIC2_MASK;
  if (GetCharAt(limitPos) == '>' && 
        (limitStyle == wxSTC_H_TAG ||
         limitStyle == wxSTC_H_TAGUNKNOWN ||
         limitStyle == wxSTC_H_TAGEND ||
         limitStyle == wxSTC_H_XMLSTART ||
         limitStyle == wxSTC_H_XMLEND))
  {
    if (GetSelectionStart() != GetSelectionEnd())
    {
      if (*protectTags)
        adjustSelection();
      else
        event.Skip();
      return;
    }
    if (!properties.deleteWholeTag)
    {
      if (!(*protectTags))
        event.Skip();
      return;
    }
    // delete tag to left of caret
    for (;
      limitPos &&
        GetCharAt(limitPos) != '<';
        limitPos--)
      ;
    SetSelection(currentPos, limitPos);//(limitPos, currentPos);
    if (*protectTags)
    {
      SetReadOnly(true); // needed to prevent erroneous BS insertion by control
      int ret = 
        wxMessageBox(_("Delete tag?"),
          _("Tags Locked"),
          wxOK | wxCANCEL | wxICON_QUESTION);
      SetReadOnly(false);
      if (ret != wxOK)
      {
        return;
      }
      // ensure selection is set correctly
      if (GetSelectionStart() != currentPos || GetSelectionEnd() != limitPos)
        SetSelection(currentPos, limitPos);
    }
    DeleteBack();
    return;            
  }
  // entity reference
  
  else if (GetCharAt(limitPos) == ';' && getLexerStyleAt(limitPos) == wxSTC_H_ENTITY)
  {
    // delete entity to left of caret
    for (;
      limitPos &&
        getLexerStyleAt(limitPos) == wxSTC_H_ENTITY &&
        GetCharAt(limitPos) != '&';
        limitPos--)
      ;
    SetSelection(limitPos, currentPos);
    if (*protectTags)
    {
      SetReadOnly(true); // needed to prevent erroneous BS insertion by control
      int ret = 
        wxMessageBox(_("Delete entity reference?"),
          _("Tags Locked"),
          wxOK | wxCANCEL | wxICON_QUESTION);
      SetReadOnly(false);
      if (ret != wxOK)
        return;
      // ensure selection is set correctly
      if (GetSelectionStart() != currentPos || GetSelectionEnd() != limitPos)
        SetSelection(currentPos, limitPos);
    }
    DeleteBack();
    return;            
  }
  else if (*protectTags)
  {
    return;
  }
  event.Skip(); 
}

void XmlCtrl::handleDelete(wxKeyEvent& event)
{
  protectHeadLine();

  validationRequired = true;
  
  // unindent range
  int start, end, startLine, endLine;
  start = GetSelectionStart();
  end = GetSelectionEnd();
  startLine = LineFromPosition(start);
  endLine = LineFromPosition(end);
  if (startLine != endLine)
  {
    if (startLine > endLine)
    {
      int temp;
      temp = startLine;
      startLine = endLine;
      endLine = temp;
      temp = start;
      start = end;
      end = temp;
    }
    if (GetColumn(start) < GetLineIndentation(startLine)  &&
      GetColumn(end) < GetLineIndentation(endLine))
    {
      for (int i = startLine; i <= endLine; i++)
      {
       int current = GetLineIndentation(i);
       if (current > 0)
         SetLineIndentation(i, current - 1);   
      }
      return;
    }
  }

  if (!canMoveRightAt(GetCurrentPos()) &&
    GetSelectionStart() == GetSelectionEnd())
  {
    int currentPos, limitPos;
    limitPos = currentPos = GetCurrentPos();
    
    // tag
    int limitStyle = getLexerStyleAt(limitPos);
    if (GetCharAt(limitPos) == '<' &&
      (limitStyle == wxSTC_H_TAG ||
        limitStyle == wxSTC_H_TAGUNKNOWN ||
        limitStyle == wxSTC_H_TAGEND ||
        limitStyle == wxSTC_H_XMLSTART ||
        limitStyle == wxSTC_H_XMLEND
      ))
    {
      if (GetSelectionStart() != GetSelectionEnd())
      {
        if (*protectTags)
          adjustSelection();
        else
          event.Skip();
        return;
      }
      if (!properties.deleteWholeTag)
      {
        if (!(*protectTags))
          event.Skip();
        return;
      }

      for (;
        GetCharAt(limitPos) != '>' && limitPos < GetLength();
        limitPos++)
      {
        if (limitPos > (currentPos + BUFSIZ))
        {
          event.Skip();
          return;
        }
      }
      if (currentPos != limitPos)
      {
        SetSelection(currentPos, limitPos + 1);
        if (*protectTags)
        {
          int ret = 
            wxMessageBox(_("Delete tag?"),
              _("Tags Locked"),
              wxOK | wxCANCEL | wxICON_QUESTION);
          if (ret != wxOK)
            return;
        }
        DeleteBack();
        return;
      }
    }
    // entity
    else if (GetCharAt(limitPos) == '&' && getLexerStyleAt(limitPos) == wxSTC_H_ENTITY)
    {
      for (;
        getLexerStyleAt(limitPos) == wxSTC_H_ENTITY && limitPos <= GetLength();
        limitPos++)
      {
        if (GetCharAt(limitPos) == ';')
          break;
        else if (GetCharAt(limitPos) == '\n' || limitPos > (currentPos + BUFSIZ))
        {
          event.Skip();
          return;
        }
      }
      if (currentPos != limitPos)
      {
        SetSelection(currentPos, limitPos + 1);
        if (*protectTags)
        {
          int ret = 
            wxMessageBox(_("Delete entity reference?"),
              _("Tags Locked"),
              wxOK | wxCANCEL | wxICON_QUESTION);
          if (ret != wxOK)
            return;
        }
        DeleteBack();
        return;
      }
    }
    
    else if (*protectTags)
      return;
  }
  event.Skip();
}

void XmlCtrl::handleOpenAngleBracket(wxKeyEvent& event)
{
  if (AutoCompActive())
    AutoCompCancel();

  if (*protectTags)
  {
    AddText(_T("&lt;"));
    return;
  }

  validationRequired = true;

  AddText(_T("<"));

  int pos = GetCurrentPos();

  // exit conditions based on style
  int style = getLexerStyleAt(pos);
  //style &= ~wxSTC_INDIC2_MASK;
  switch (style)
  {
    case wxSTC_H_DOUBLESTRING:
    case wxSTC_H_SINGLESTRING:
      return;
    default:
      break;
  }

  // determine parent element
  int parentCloseAngleBracket;
  parentCloseAngleBracket = getParentCloseAngleBracket(pos);

  if (parentCloseAngleBracket < 0)
    return;
  
  wxString wideParent = getLastElementName(parentCloseAngleBracket);
  if (wideParent.empty())
    return;

  std::string parent = (const char *)wideParent.mb_str(wxConvUTF8);

  if (elementMap.find(parent) == elementMap.end())
    return;
  
  wxString choice, conversion;
  std::set<std::string> childSet = elementMap[parent];
  std::set<std::string>::iterator it;
  for (it = childSet.begin(); it != childSet.end(); it++)
  {
    if (!choice.empty())
      choice.append(_T("<"));
    conversion = wxString(it->c_str(), wxConvUTF8, it->size());
    choice.append(conversion);
  }
  if (!choice.empty())
    UserListShow(0, choice);
}

void XmlCtrl::handleCloseAngleBracket(wxKeyEvent& event)
{
  if (AutoCompActive())
    AutoCompCancel();

  if (*protectTags)
  {
    AddText(_T("&gt;"));
    return; 
  }

  validationRequired = true;

  wxString insertBuffer;
  int pos;
  pos = GetCurrentPos();
    
  wxString elementName = getLastElementName(pos);
  if (!elementName.empty())
  {
    std::map<std::string, std::set<std::string> > map;
    std::string elementNameUtf8 = (const char *)elementName.mb_str(wxConvUTF8);
    attributeMap.insert(make_pair(elementNameUtf8, map)); 
  }

  // exit condition 1
  if (pos <= 1)
  {
    event.Skip();
    return;
  }
  // exit condition 2 (empty tag/end of CDATA section)
  else if (GetCharAt(pos - 1) == '/' ||
    GetCharAt(pos - 1) == ']')
  {
    event.Skip();
    return;
  }
  // exit condition 3 (comment/CDATA)
  else if (getLexerStyleAt(pos - 1) == wxSTC_H_COMMENT ||
    getLexerStyleAt(pos - 1) == wxSTC_H_CDATA ||
    (getLexerStyleAt(pos - 1) == wxSTC_H_DOUBLESTRING && (GetCharAt(pos - 1) != '"')) ||
    (getLexerStyleAt(pos - 1) == wxSTC_H_SINGLESTRING && (GetCharAt(pos - 1) != '\'')))
  {
    event.Skip();
    return;
  }
  
  if (!elementName.empty())
	{
		if (!properties.insertCloseTag)
    {
		  event.Skip();
		  return;
    }
    AddText(_T(">"));
    insertBuffer += _T("</");
	  insertBuffer += elementName;
	  insertBuffer += _T(">");
		InsertText(pos + 1, insertBuffer);
		SetSelection(pos + 1, pos + 1);
	}
	else
	  event.Skip();
}

void XmlCtrl::handleEquals(wxKeyEvent& event)
{
  if (AutoCompActive())
    AutoCompCancel();

  wxString choice, elementName, attributeName, conversion;
  std::string elementNameUtf8, attributeNameUtf8;
  int pos = GetCurrentPos();
  if (pos <= 0 || getLexerStyleAt(pos - 1) != wxSTC_H_ATTRIBUTE)
  {
    event.Skip();
    return;
  }
  AddText(_T("=\"\""));
  SetSelection(pos + 2, pos + 2);
      
  // tbd: identify possible attribute values
  elementName = getLastElementName(pos);
  attributeName = getLastAttributeName(pos);
  
  elementNameUtf8 = elementName.mb_str(wxConvUTF8);
  attributeNameUtf8 = attributeName.mb_str(wxConvUTF8);
  
  std::set<std::string> valueSet;
  
  valueSet = attributeMap[elementNameUtf8][attributeNameUtf8];
  if (valueSet.empty())
    return;

  std::set<std::string>::iterator valueSetIterator;
  int cutoff = BUFSIZ;
  for (valueSetIterator = valueSet.begin();
    valueSetIterator != valueSet.end();
    valueSetIterator++)
  {
    if (!(cutoff--))
      break;
    if (!choice.empty())
      choice.Append(_T("<"));
    conversion = wxString(
      valueSetIterator->c_str(),
      wxConvUTF8,
      valueSetIterator->size());
    choice.Append(conversion);
  }

  if (!choice.empty())
    UserListShow(0, choice);
}

void XmlCtrl::handleSpace(wxKeyEvent& event)
{
  if (AutoCompActive())
    AutoCompCancel();

  wxString elementName, choice, conversion;
  std::string elementNameUtf8;
  int pos = GetCurrentPos();
  std::map<std::string, std::set<std::string> > currentAttributeMap;
  std::map<std::string, std::set<std::string> >::iterator
    attributeIterator;
  if (pos <= 2)
  {
    event.Skip();
    return;
  }

  int style = getLexerStyleAt(pos - 1);
  //style &= ~wxSTC_INDIC2_MASK;

  char c = GetCharAt(pos - 1);

  bool proceed = false;
  // space pressed after element name
  if (
    style == wxSTC_H_TAG ||
    style == wxSTC_H_TAGUNKNOWN ||
    style == wxSTC_H_ATTRIBUTEUNKNOWN ||
    style == wxSTC_H_ATTRIBUTE) { proceed = true; }
  // space pressed after attribute value
  else if (
    (style == wxSTC_H_DOUBLESTRING ||
    style == wxSTC_H_SINGLESTRING) &&
    (c == '\'' || c == '"') &&
    GetCharAt(pos - 2) != '=') { proceed = true; }

  int tagStartPos = getTagStartPos(pos);
  if (!proceed || tagStartPos == -1)
  {
    event.Skip();
    return;
  }

  AddText(_T(" "));
  elementName = getLastElementName(pos);
  wxString tag = GetTextRange(tagStartPos, pos);

  elementNameUtf8 = elementName.mb_str(wxConvUTF8);
  if (attributeMap.find(elementNameUtf8) == attributeMap.end())
    return;
  currentAttributeMap = attributeMap[elementNameUtf8];
  for (
    attributeIterator = currentAttributeMap.begin();
    attributeIterator != currentAttributeMap.end();
    attributeIterator++)
  {
    conversion = wxString(
      attributeIterator->first.c_str(),
      wxConvUTF8,
      attributeIterator->first.size());

    // avoid duplicate attributes
    if (tag.Contains(conversion + _T("=")))
      continue;

    if (!choice.empty())
      choice.Append(_T("<"));
    choice.Append(conversion);
  }
  if (!choice.empty())
    UserListShow(0, choice);
}

void XmlCtrl::handleAmpersand(wxKeyEvent& event)
{
  if (AutoCompActive())
    AutoCompCancel();

  validationRequired = true;

  if (*protectTags)
  {
    AddText(_T("&amp;"));
    return; 
  }

  int pos, style;
  pos = GetCurrentPos();
  style = getLexerStyleAt(pos);
  if (style != wxSTC_H_COMMENT &&
    style != wxSTC_H_CDATA &&
    style != wxSTC_H_TAGUNKNOWN &&
    entitySet.size() >= 4) // min. 4 default entities
  {
    AddText(_T("&"));
    wxString choice;
    std::set<std::string>::iterator it;
    it = entitySet.begin();
    choice += wxString(it->c_str(), wxConvUTF8, it->size());
    choice += _T(";");
    for (it++; it != entitySet.end(); it++)
    {
      choice += _T("<");
      choice += wxString(it->c_str(), wxConvUTF8, it->size());
      choice += _T(";");
    }
    UserListShow(0, choice);
  }
  else
    event.Skip();  
}

void XmlCtrl::handleForwardSlash(wxKeyEvent& event)
{
  if (AutoCompActive())
    AutoCompCancel();

  int pos = GetCurrentPos();
  if (
    (pos <= 0) ||
    GetCharAt(pos - 1) != '<' ||
    getLexerStyleAt(pos) == wxSTC_H_COMMENT ||
    getLexerStyleAt(pos) == wxSTC_H_CDATA)
  {
    event.Skip();
    return;
  }

  AddText(_T("/"));

  int parentCloseAngleBracket = getParentCloseAngleBracket(pos);
  if (parentCloseAngleBracket < 0)
    return;
    
  wxString wideParent = getLastElementName(parentCloseAngleBracket);
  if (wideParent.empty())
    return;
  AddText(wideParent + _T(">"));
}

void XmlCtrl::OnKeyPressed(wxKeyEvent& event)
{
  if (*protectTags && GetSelectionStart() != GetSelectionEnd())
  {
    adjustSelection();
  }
  if (*protectTags)
    SetOvertype(false);

  //bool autoindent;
  int pos, iteratorPos, maxPos; // omitted startPos, line, newPos
  char c;
  wxString s;
  switch (event.GetKeyCode())
  {
    case WXK_RETURN:
      if (AutoCompActive())
      {
        AutoCompComplete();
        return;
      }

      if (*protectTags)
        adjustPosRight();
      
      insertNewLine();
      return;
    case WXK_RIGHT:
      pos = GetCurrentPos();

      if (*protectTags && !canMoveRightAt(pos))
      {
        SetSelection(pos + 1, pos + 1);
        adjustPosRight();
        return;
      }

      maxPos = GetLength();
      c = GetCharAt(pos);
      if (c == '<' && event.ControlDown() && !event.ShiftDown())
      {
        for (
          iteratorPos = pos;
          iteratorPos < maxPos &&
          GetCharAt(iteratorPos) != ' ' &&
          GetCharAt(iteratorPos) != '>' &&
          GetCharAt(iteratorPos) != '\n';
          ++iteratorPos)
          ;
        ++iteratorPos;
        SetSelection(iteratorPos, iteratorPos);
        return;
      }
      else
        break;
    case WXK_LEFT:
      pos = GetCurrentPos();
      if (*protectTags && !canMoveLeftAt(pos))
      {
        adjustPosLeft();
        return;
      }

      if (pos < 3)
        break;
      c = GetCharAt(pos - 1);
      if (c == '>' && event.ControlDown() && !event.ShiftDown())
      {
        for (
          iteratorPos = pos - 1;
          iteratorPos > 0 &&
          GetCharAt(iteratorPos) != '<' &&
          GetCharAt(iteratorPos) != ' ' &&
          GetCharAt(iteratorPos) != '=' &&
          GetCharAt(iteratorPos) != '\n';
          --iteratorPos)
          ;
        if (
          GetCharAt(iteratorPos) != '<' &&
          GetCharAt(iteratorPos) != '=')
          ++iteratorPos;
        SetSelection(iteratorPos, iteratorPos);
        return;
      }
      else
        break;
    case WXK_UP:
      if (*protectTags)
      {
        LineUp();
        if (!canInsertAt(GetCurrentPos()))
          adjustPosLeft();
        return; 
      }
      break;
    case WXK_DOWN:
      if (*protectTags)
      {
        LineDown();
        if (!canInsertAt(GetCurrentPos()))
          adjustPosRight();
        return; 
      }
      break;
    case WXK_INSERT:
      if (*protectTags)
        return; 
      break;
    case WXK_BACK:
      handleBackspace(event);
      return;
    case WXK_TAB:
      if (*protectTags)
      {
        if (!canInsertAt(GetCurrentPos()))
          adjustPosRight(); 
      }
      break;
    case WXK_HOME:
      if (*protectTags && !event.ControlDown() && !event.ShiftDown())
      {
        Home();
        if (!canInsertAt(GetCurrentPos()))
          adjustPosLeft();
        return;
      }
      break;
    case WXK_END:
      if (*protectTags && !event.ControlDown() && !event.ShiftDown())
      {
        LineEnd();
        if (!canInsertAt(GetCurrentPos()))
          adjustPosRight();
        return;
      }
      break;
    case WXK_PAGEUP:
      if (*protectTags)
      {
        PageUp();
        if (!canInsertAt(GetCurrentPos()))
          adjustPosLeft();
        return; 
      }
      break;
    case WXK_PAGEDOWN:
      if (*protectTags)
      {
        PageDown();
        if (!canInsertAt(GetCurrentPos()))
          adjustPosRight();
        return; 
      }
      break;
    case WXK_DELETE:
        handleDelete(event);
      return;
    default:
      break;
  }
  event.Skip();
}

wxString XmlCtrl::getLastElementName(int pos)
{
  if (pos < 1)
    return _T("");

  int startPos, iteratorPos;
  
  for (startPos = pos - 1; startPos >= 0; --startPos)
  {
    char c = GetCharAt(startPos);
    if (c == '>')
      return _T("");
    else if (c == '<')
      break;
  }

  // exit if not found or closing/declaration/command tag
  if (GetCharAt(startPos) != '<' || 
    GetCharAt(startPos + 1) == '/' ||
    GetCharAt(startPos + 1) == '?' ||
    GetCharAt(startPos + 1) == '!')
    return _T("");

  ++startPos;
  for (iteratorPos = startPos;
    iteratorPos < pos &&
    GetCharAt(iteratorPos) != ' ' &&
    GetCharAt(iteratorPos) != '\n' &&
    GetCharAt(iteratorPos) != '\t' &&
    GetCharAt(iteratorPos) != '/' &&
    GetCharAt(iteratorPos) != '>';
    ++iteratorPos)
    ;
  if (startPos == iteratorPos)
    return _T("");
  return GetTextRange(startPos, iteratorPos);
}

std::set<wxString> XmlCtrl::getChildren(const wxString& parent)
{
  std::string parentUtf8 = (const char *)parent.mb_str(wxConvUTF8);
  std::set<wxString> mySet;

  if (elementMap.find(parentUtf8) == elementMap.end())
    return mySet;

  std::set<std::string> myUtf8Set = elementMap[parentUtf8];
  std::string currentUtf8;
  wxString currentWide;
  
  std::set<std::string>::iterator it;
  for (it = myUtf8Set.begin(); it != myUtf8Set.end(); it++)
  {
    currentUtf8 = *it;
    currentWide = wxString(currentUtf8.c_str(), wxConvUTF8, currentUtf8.size());
    mySet.insert(currentWide);
  }
  return mySet;
}

wxString XmlCtrl::getLastAttributeName(int pos)
{
  if (pos < 1)
    return _T("");

  int startPos;
  
  for (startPos = pos - 1; startPos >= 0; --startPos)
  {
    char c = GetCharAt(startPos);
    if (c == ' ' || c == '<')
      break;
  }

  if (GetCharAt(startPos) != ' ' ||
    startPos >= pos - 1) 
    return _T("");

  return GetTextRange(startPos + 1, pos);
}

int XmlCtrl::getParentCloseAngleBracket(int pos, int range)
{
  int cutoff, iteratorPos, depth;
  cutoff = ((pos - range) > 2) ? pos - range : 2;
  depth = 1;
  for (
    iteratorPos = pos;
    iteratorPos > cutoff;
    --iteratorPos)
  {
    int type, style;
    style = getLexerStyleAt(iteratorPos);
    //style &= ~wxSTC_INDIC2_MASK;

    if (GetCharAt(iteratorPos) == '>' &&
      (style == wxSTC_H_TAG ||
        style == wxSTC_H_TAGUNKNOWN))
    {
      type = getTagType(iteratorPos);
      switch (type)
      {
        case (TAG_TYPE_CLOSE):
          ++depth;
          break;
        case (TAG_TYPE_OPEN):
          --depth;
          break;
        case (TAG_TYPE_EMPTY):
        case (TAG_TYPE_OTHER):
        case (TAG_TYPE_ERROR):
          break;
      }
      //(isCloseTag(iteratorPos)) ? ++depth : --depth;
      if (!depth)
        return iteratorPos;
    }
  }
  return -1;
}

void XmlCtrl::adjustNoColumnWidth()
{
  int maxLine = GetLineCount();
  if (maxLine == currentMaxLine)
    return;

  int digits, charWidth, width;
	digits = 0;
	do	
	{
		++digits;
		maxLine /= 10;
	}
	while (maxLine);
	digits = (digits > 2) ? digits : 2;
  charWidth = TextWidth(wxSTC_STYLE_LINENUMBER, _T("9"));
  width = (digits + 2) * charWidth;
  SetMarginWidth(0, width);
  currentMaxLine = maxLine;
}

void XmlCtrl::updatePromptMaps()
{
  wxString buffer = GetText();
  std::string bufferUtf8;
  bufferUtf8 = (const char *)buffer.mb_str(wxConvUTF8);
  XmlEncodingHandler::setUtf8(bufferUtf8, true);
  
  updatePromptMaps(bufferUtf8.c_str(), bufferUtf8.size());
}

void XmlCtrl::updatePromptMaps(const char *buffer, size_t bufferLen)
{
  attributeMap.clear();
  elementMap.clear();
  std::auto_ptr<XmlPromptGenerator> xpg(new XmlPromptGenerator(
    catalogPath,
    basePath,
    auxPath));
  xpg->parse(buffer, bufferLen);
  xpg->getAttributeMap(attributeMap);
  xpg->getRequiredAttributeMap(requiredAttributeMap);
  xpg->getElementMap(elementMap);
  xpg->getEntitySet(entitySet);
  dtdFound = xpg->getDtdFound();
  entitySet.insert("apos");
  entitySet.insert("quot");
  entitySet.insert("lt");
  entitySet.insert("gt");
}

void XmlCtrl::applyProperties(
  XmlCtrlProperties propertiesParameter,
  bool zoomOnly)
{
  properties = propertiesParameter;

  SetZoom((type != FILE_TYPE_BINARY) ? properties.zoom : 0);

  if (zoomOnly)
    return;

  SetCaretLineVisible(properties.currentLine);
  SetIndentationGuides(
    (type != FILE_TYPE_BINARY) ? properties.indentLines : false);
  SetWrapMode((type != FILE_TYPE_BINARY) ? properties.wrap : false);
  SetViewWhiteSpace(
    (properties.whitespaceVisible) ?
      wxSTC_WS_VISIBLEAFTERINDENT : wxSTC_WS_INVISIBLE);
  
  switch (type)
  {
    case FILE_TYPE_BINARY:
      SetLexer(wxSTC_LEX_NULL);
      break;
    case FILE_TYPE_CSS:
      SetLexer(wxSTC_LEX_CSS);
      break;
    default:
      SetLexer(wxSTC_LEX_XML);
      break; 
  }

  setColorScheme(
    (type != FILE_TYPE_BINARY) ? properties.colorScheme : COLOR_SCHEME_NONE);

  // line no margin
  if (properties.number) // permit line nos for large files
  {
    SetMarginType(0, wxSTC_MARGIN_NUMBER); // width set at idle time
    adjustNoColumnWidth();
  }
  else
    SetMarginWidth(0, 0);
  
  SetMarginWidth(1, 0);
  
  if (properties.fold && type != FILE_TYPE_BINARY)
  {
    // folding margin
    SetMarginType(2, wxSTC_MARGIN_SYMBOL);
    SetMarginMask(2, wxSTC_MASK_FOLDERS);
    SetMarginSensitive(2, true);
    SetMarginWidth(2, 16);
  
    // define folding markers
    MarkerDefine(wxSTC_MARKNUM_FOLDEREND, wxSTC_MARK_BOXPLUSCONNECTED,  *wxWHITE, *wxBLACK);
    MarkerDefine(wxSTC_MARKNUM_FOLDEROPENMID, wxSTC_MARK_BOXMINUSCONNECTED, *wxWHITE, *wxBLACK);
    MarkerDefine(wxSTC_MARKNUM_FOLDERMIDTAIL, wxSTC_MARK_TCORNER, *wxWHITE, *wxBLACK);
    MarkerDefine(wxSTC_MARKNUM_FOLDERTAIL, wxSTC_MARK_LCORNER, *wxWHITE, *wxBLACK);
    MarkerDefine(wxSTC_MARKNUM_FOLDERSUB, wxSTC_MARK_VLINE, *wxWHITE, *wxBLACK);
    MarkerDefine(wxSTC_MARKNUM_FOLDER, wxSTC_MARK_BOXPLUS, *wxWHITE, *wxBLACK);
    MarkerDefine(wxSTC_MARKNUM_FOLDEROPEN, wxSTC_MARK_BOXMINUS, *wxWHITE, *wxBLACK);
  }
  else
  {
    SetMarginWidth(2, 0);
  }

  if (type != FILE_TYPE_BINARY)
  {
    Colourise(0, -1);
  }

  wxString value = (properties.fold && type != FILE_TYPE_BINARY) ? _T("1") : _T("0");
  SetProperty(_T("fold"), value);
  SetProperty(_T("fold.compact"), value);
  SetProperty(_T("fold.html"), value);
}

void XmlCtrl::OnMarginClick(wxStyledTextEvent& event)
{
  const int line = LineFromPosition(event.GetPosition());
  const int margin = event.GetMargin();

  // let others process this first
  if (GetParent()->GetEventHandler()->ProcessEvent(event))
    return;

  if (margin == 2)
  {
    const int level = GetFoldLevel(line);
    if (((level) & (wxSTC_FOLDLEVELHEADERFLAG)) != 0)
      ToggleFold(line);
  }
  else
    event.Skip(); 
}

void XmlCtrl::OnMouseLeftDown(wxMouseEvent& event)
{
  SetMouseDownCaptures(!*protectTags);
  event.Skip();
}

void XmlCtrl::OnMouseLeftUp(wxMouseEvent& event)
{
  event.Skip();
  if (*protectTags && !canInsertAt(GetCurrentPos()))
    adjustPosRight();
}

void XmlCtrl::OnMouseRightUp(wxMouseEvent& event)
{
  if (*protectTags)
    return;
  event.Skip(); 
}

bool XmlCtrl::isCloseTag(int pos)
{
  int iteratorPos;
  for (iteratorPos = pos; iteratorPos >= 0; --iteratorPos)
  {
    if (GetCharAt(iteratorPos) == '<' && getLexerStyleAt(iteratorPos) == wxSTC_H_TAG)
      return (GetCharAt(iteratorPos + 1) == '/') ? true : false;
  }
  return false; 
}

int XmlCtrl::getTagStartPos(int pos)
{
  int iteratorPos;
  for (iteratorPos = pos; iteratorPos >= 0; --iteratorPos)
  {
    if (GetCharAt(iteratorPos) == '<' && getLexerStyleAt(iteratorPos) == wxSTC_H_TAG)
      return iteratorPos; 
  }
  return -1;
}

int XmlCtrl::getAttributeStartPos(int pos)
{
  int iteratorPos;
  char c;
  bool attributeSeen = false;
  for (iteratorPos = pos; iteratorPos > 0; iteratorPos--)
  {
    c = GetCharAt(iteratorPos);
    if ((getLexerStyleAt(iteratorPos)) == wxSTC_H_ATTRIBUTE)
      attributeSeen = true;
    else if ((c == ' ' || c == '\t' || c == '\n') && attributeSeen)
      return iteratorPos;
  }
  return -1;
}

int XmlCtrl::getAttributeSectionEndPos(int pos, int range)
{
  int iteratorPos, limit, style;
  limit = pos + range;
  
  for (iteratorPos = pos; iteratorPos < limit; iteratorPos++)
  {
    style = getLexerStyleAt(iteratorPos);
    switch (style)
    {
      case wxSTC_H_TAG:
      case wxSTC_H_TAGEND:
      case wxSTC_H_XMLEND:
      case wxSTC_H_QUESTION:
        return iteratorPos;
      default:
        continue; 
    }
  }
  return -1;
}

void XmlCtrl::adjustCursor()
{
  if (!canInsertAt(GetCurrentPos()))
    adjustPosRight();
}

bool XmlCtrl::canInsertAt(int pos)
{
  if (pos < 0)
    return false;

  int style = getLexerStyleAt(pos);
  //style &= ~wxSTC_INDIC2_MASK;
  switch (style)
  {
    case wxSTC_H_TAG:
    case wxSTC_H_TAGUNKNOWN:
    case wxSTC_H_QUESTION:
    case wxSTC_H_CDATA:
    case wxSTC_H_COMMENT:
    case wxSTC_H_SGML_DEFAULT:
      return (GetCharAt(pos) == '<') ? true : false;
    case wxSTC_H_ENTITY:
      return (GetCharAt(pos) == '&') ? true : false;
    case wxSTC_H_DEFAULT:
      return true;
  }
  return false;
}

bool XmlCtrl::canMoveRightAt(int pos)
{
  int style = getLexerStyleAt(pos);
  //style &= ~wxSTC_INDIC2_MASK;
  switch (style)
  {
    case wxSTC_H_DEFAULT:
      return true;
  }
  return false;
}

bool XmlCtrl::canMoveLeftAt(int pos)
{
  if (pos < 1)
    return false;

  int style = getLexerStyleAt(pos - 1);
  //style &= ~wxSTC_INDIC2_MASK;
  switch (style)
  {
    case wxSTC_H_DEFAULT:
      return true;
  }
  return false;
}

void XmlCtrl::adjustPosRight()
{
  int pos, max;
  bool canInsert = false;
  pos = GetCurrentPos();
  max = GetLength();
  for (; pos <= max; pos++)
    if (canInsertAt(pos))
    {
      canInsert = true;
      break;
    }
  SetSelection(pos, pos);
}

void XmlCtrl::adjustPosLeft()
{
  int pos;
  bool canInsert = false;
  pos = GetCurrentPos() - 1;
  if (pos < 0)
  {
    SetSelection(0, 0);
    return;
  }
  for (; pos > 0; pos--)
    if (canInsertAt(pos))
    {
      canInsert = true;
      break;
    }
  SetSelection(pos, pos);
}

void XmlCtrl::adjustSelection()
{
  int start, end, iterator;
  start = GetSelectionStart();
  end = GetSelectionEnd();

  // exit condition 1
  if (start == end && canInsertAt(start))
    return; 
  
  // exit condition 2
  else if (!canInsertAt(start) || start > end)
  {
    SetSelection(start, start);
    return;
  }

  for (iterator = start; iterator < end; iterator++)
  {
    if (!canMoveRightAt(iterator))
      break;
  }
  SetSelection(start, iterator);
}

void XmlCtrl::setColorScheme(int scheme)
{
  StyleSetFaceName(wxSTC_STYLE_DEFAULT, properties.font);

  switch (scheme)
  {
    case COLOR_SCHEME_DEFAULT:
      StyleSetForeground(wxSTC_STYLE_DEFAULT, *wxBLACK);
      StyleSetBackground(wxSTC_STYLE_DEFAULT, *wxWHITE);
      StyleClearAll();

      baseBackground = LightColour(wxTheColourDatabase->Find(_T("YELLOW")), 20);
      alternateBackground = LightColour(wxTheColourDatabase->Find(_T("YELLOW")), 60);
      SetCaretLineBackground(baseBackground);
      
      SetCaretForeground(*wxBLACK);
      SetSelBackground(true, wxTheColourDatabase->Find(_T("LIGHT GREY")));

      if (type == FILE_TYPE_CSS)
      {
        // CSS colours
        StyleSetForeground(wxSTC_CSS_DEFAULT, *wxBLACK);
        StyleSetForeground(wxSTC_CSS_TAG, *wxBLUE);
        StyleSetForeground(wxSTC_CSS_CLASS, *wxBLUE);
        StyleSetForeground(wxSTC_CSS_PSEUDOCLASS, *wxBLUE);
        StyleSetForeground(wxSTC_CSS_UNKNOWN_PSEUDOCLASS, *wxBLUE);
        StyleSetForeground(wxSTC_CSS_OPERATOR, *wxBLUE);
        StyleSetForeground(wxSTC_CSS_IDENTIFIER, *wxBLUE);
        
        StyleSetForeground(wxSTC_CSS_UNKNOWN_IDENTIFIER, *wxBLUE);
        StyleSetForeground(wxSTC_CSS_VALUE, *wxBLACK);
        StyleSetForeground(wxSTC_CSS_COMMENT,
          wxTheColourDatabase->Find(_T("GREY")));
        StyleSetForeground(wxSTC_CSS_ID, *wxBLACK);
        StyleSetForeground(wxSTC_CSS_IMPORTANT, *wxRED);
        StyleSetForeground(wxSTC_CSS_DIRECTIVE, *wxBLUE);
        StyleSetForeground(wxSTC_CSS_DOUBLESTRING, *wxRED);
        StyleSetForeground(wxSTC_CSS_SINGLESTRING, *wxRED);
        StyleSetForeground(wxSTC_CSS_IDENTIFIER2, *wxRED);
        StyleSetForeground(wxSTC_CSS_ATTRIBUTE, *wxBLUE);
      }
      else // XML
      {
        StyleSetForeground(wxSTC_H_DEFAULT, *wxBLACK);
        StyleSetForeground(wxSTC_H_TAG, *wxBLUE);
        StyleSetForeground(wxSTC_H_TAGUNKNOWN, *wxBLUE);
        StyleSetForeground(wxSTC_H_ATTRIBUTE, *wxRED);
        StyleSetForeground(wxSTC_H_ATTRIBUTEUNKNOWN, *wxRED);
        StyleSetForeground(wxSTC_H_NUMBER, *wxBLACK);
        StyleSetForeground(wxSTC_H_DOUBLESTRING, *wxBLACK);
        StyleSetForeground(wxSTC_H_SINGLESTRING, *wxBLACK);
        StyleSetForeground(wxSTC_H_OTHER, *wxBLUE);
        StyleSetForeground(wxSTC_H_COMMENT,
          wxTheColourDatabase->Find(_T("GREY")));
        StyleSetForeground(wxSTC_H_ENTITY, *wxRED);
        StyleSetForeground(wxSTC_H_TAGEND, *wxBLUE);
        StyleSetForeground(wxSTC_H_XMLSTART,
          wxTheColourDatabase->Find(_T("GREY")));
        StyleSetForeground(wxSTC_H_XMLEND,
          wxTheColourDatabase->Find(_T("GREY")));
        StyleSetForeground(wxSTC_H_CDATA, *wxRED);
        StyleSetForeground(wxSTC_H_QUESTION,
          wxTheColourDatabase->Find(_T("GREY")));
        
        for (int i = wxSTC_H_SGML_DEFAULT; i <= wxSTC_H_SGML_BLOCK_DEFAULT; i++)
          StyleSetForeground(i, *wxBLUE);
        StyleSetForeground(wxSTC_H_SGML_ENTITY, *wxRED);
        StyleSetForeground(wxSTC_H_SGML_SPECIAL, *wxBLACK);
        StyleSetForeground(wxSTC_H_SGML_SIMPLESTRING, *wxRED);
        StyleSetForeground(wxSTC_H_SGML_DEFAULT,
          wxTheColourDatabase->Find(_T("GREY")));
      }        
      break;
    case COLOR_SCHEME_DEFAULT_BACKGROUND:
      StyleSetForeground(wxSTC_STYLE_DEFAULT, *wxBLACK);
      StyleSetBackground(wxSTC_STYLE_DEFAULT, *wxWHITE);
      StyleClearAll();

      baseBackground = LightColour(wxTheColourDatabase->Find(_T("YELLOW")), 20);
      alternateBackground = LightColour(wxTheColourDatabase->Find(_T("YELLOW")), 60);
      SetCaretLineBackground(baseBackground);

      SetCaretForeground(*wxBLACK);
      SetSelBackground(true, wxTheColourDatabase->Find(_T("LIGHT GREY")));

      if (type == FILE_TYPE_CSS)
      {
        // CSS colours
        StyleSetForeground(wxSTC_CSS_DEFAULT, *wxBLACK);
        StyleSetForeground(wxSTC_CSS_TAG, 
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_CSS_CLASS,
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_CSS_PSEUDOCLASS,
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_CSS_UNKNOWN_PSEUDOCLASS, 
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_CSS_OPERATOR, 
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_CSS_IDENTIFIER, 
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        
        StyleSetForeground(wxSTC_CSS_UNKNOWN_IDENTIFIER, 
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_CSS_VALUE, *wxBLACK);
        StyleSetForeground(wxSTC_CSS_COMMENT,
          wxTheColourDatabase->Find(_T("GREY")));
        StyleSetForeground(wxSTC_CSS_ID, *wxBLACK);
        StyleSetForeground(wxSTC_CSS_IMPORTANT, 
          wxTheColourDatabase->Find(_T("ORANGE")));
        StyleSetForeground(wxSTC_CSS_DIRECTIVE, 
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_CSS_DOUBLESTRING,
          wxTheColourDatabase->Find(_T("ORANGE")));
        StyleSetForeground(wxSTC_CSS_SINGLESTRING,
          wxTheColourDatabase->Find(_T("ORANGE")));
        StyleSetForeground(wxSTC_CSS_IDENTIFIER2,
          wxTheColourDatabase->Find(_T("ORANGE")));
        StyleSetForeground(wxSTC_CSS_ATTRIBUTE, 
          wxTheColourDatabase->Find(_T("SKY BLUE")));
      }
      else // XML
      {
        StyleSetForeground(wxSTC_H_DEFAULT, *wxBLACK);
        StyleSetForeground(wxSTC_H_TAG,
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_H_TAGUNKNOWN,
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_H_ATTRIBUTE,
          wxTheColourDatabase->Find(_T("ORANGE")));
        StyleSetForeground(wxSTC_H_ATTRIBUTEUNKNOWN,
          wxTheColourDatabase->Find(_T("ORANGE")));
        StyleSetForeground(wxSTC_H_NUMBER,
          wxTheColourDatabase->Find(_T("GREY")));
        StyleSetForeground(wxSTC_H_DOUBLESTRING, 
          wxTheColourDatabase->Find(_T("GREY")));
        StyleSetForeground(wxSTC_H_SINGLESTRING,
          wxTheColourDatabase->Find(_T("GREY")));
        StyleSetForeground(wxSTC_H_OTHER,
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_H_COMMENT,
          wxTheColourDatabase->Find(_T("GREY")));
        StyleSetForeground(wxSTC_H_ENTITY,
          wxTheColourDatabase->Find(_T("ORANGE")));
        StyleSetForeground(wxSTC_H_TAGEND, 
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_H_XMLSTART, 
          wxTheColourDatabase->Find(_T("GREY")));
        StyleSetForeground(wxSTC_H_XMLEND,
          wxTheColourDatabase->Find(_T("GREY")));
        StyleSetForeground(wxSTC_H_CDATA, 
          wxTheColourDatabase->Find(_T("ORANGE")));
        StyleSetForeground(wxSTC_H_QUESTION, 
          wxTheColourDatabase->Find(_T("GREY")));
  
        for (int i = wxSTC_H_SGML_DEFAULT; i <= wxSTC_H_SGML_BLOCK_DEFAULT; i++)
          StyleSetForeground(i, wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_H_SGML_ENTITY,
          wxTheColourDatabase->Find(_T("ORANGE")));
        StyleSetForeground(wxSTC_H_SGML_SPECIAL, *wxBLACK);
        StyleSetForeground(wxSTC_H_SGML_SIMPLESTRING, 
          wxTheColourDatabase->Find(_T("ORANGE")));
        StyleSetForeground(wxSTC_H_SGML_DEFAULT, 
          wxTheColourDatabase->Find(_T("GREY")));
      }
      break;
    case COLOR_SCHEME_REDUCED_GLARE:
      StyleSetForeground(wxSTC_STYLE_DEFAULT,
        wxTheColourDatabase->Find(_T("LIGHT GREY")));
      StyleSetBackground(wxSTC_STYLE_DEFAULT,
        wxTheColourDatabase->Find(_T("MIDNIGHT BLUE")));
      StyleClearAll();

      baseBackground = LightColour(wxTheColourDatabase->Find(_T("NAVY")), 0);
      alternateBackground = LightColour(wxTheColourDatabase->Find(_T("NAVY")), 10);
      SetCaretLineBackground(baseBackground);

      StyleSetForeground(wxSTC_STYLE_LINENUMBER, *wxBLACK);

      SetCaretForeground(*wxWHITE);
      SetSelBackground(true, wxTheColourDatabase->Find(_T("GREY")));

      if (type == FILE_TYPE_CSS)
      {
        // CSS colours
        StyleSetForeground(wxSTC_CSS_DEFAULT,
          wxTheColourDatabase->Find(_T("LIGHT GREY")));
        StyleSetForeground(wxSTC_CSS_TAG, 
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_CSS_CLASS,
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_CSS_PSEUDOCLASS,
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_CSS_UNKNOWN_PSEUDOCLASS, 
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_CSS_OPERATOR, 
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_CSS_IDENTIFIER, 
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        
        StyleSetForeground(wxSTC_CSS_UNKNOWN_IDENTIFIER, 
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_CSS_VALUE, *wxWHITE);
        StyleSetForeground(wxSTC_CSS_COMMENT,
          wxTheColourDatabase->Find(_T("LIGHT GREY")));
        StyleSetForeground(wxSTC_CSS_ID, *wxWHITE);
        StyleSetForeground(wxSTC_CSS_IMPORTANT, 
          wxTheColourDatabase->Find(_T("ORANGE")));
        StyleSetForeground(wxSTC_CSS_DIRECTIVE, 
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_CSS_DOUBLESTRING,
          wxTheColourDatabase->Find(_T("ORANGE")));
        StyleSetForeground(wxSTC_CSS_SINGLESTRING,
          wxTheColourDatabase->Find(_T("ORANGE")));
        StyleSetForeground(wxSTC_CSS_IDENTIFIER2,
          wxTheColourDatabase->Find(_T("ORANGE")));
        StyleSetForeground(wxSTC_CSS_ATTRIBUTE, 
          wxTheColourDatabase->Find(_T("SKY BLUE")));
      }
      else // XML
      {
        StyleSetForeground(wxSTC_H_DEFAULT, *wxWHITE);
        StyleSetForeground(wxSTC_H_TAG,
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_H_TAGUNKNOWN,
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_H_ATTRIBUTE,
          wxTheColourDatabase->Find(_T("ORANGE")));
        StyleSetForeground(wxSTC_H_ATTRIBUTEUNKNOWN,
          wxTheColourDatabase->Find(_T("ORANGE")));
        StyleSetForeground(wxSTC_H_NUMBER,
          wxTheColourDatabase->Find(_T("LIGHT GREY")));
        StyleSetForeground(wxSTC_H_DOUBLESTRING, 
          wxTheColourDatabase->Find(_T("LIGHT GREY")));
        StyleSetForeground(wxSTC_H_SINGLESTRING,
          wxTheColourDatabase->Find(_T("LIGHT GREY")));
        StyleSetForeground(wxSTC_H_OTHER,
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_H_COMMENT,
          wxTheColourDatabase->Find(_T("LIGHT GREY")));
        StyleSetForeground(wxSTC_H_ENTITY,
          wxTheColourDatabase->Find(_T("ORANGE")));
        StyleSetForeground(wxSTC_H_TAGEND, 
          wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_H_XMLSTART, 
          wxTheColourDatabase->Find(_T("LIGHT GREY")));
        StyleSetForeground(wxSTC_H_XMLEND,
          wxTheColourDatabase->Find(_T("LIGHT GREY")));
        StyleSetForeground(wxSTC_H_CDATA, 
          wxTheColourDatabase->Find(_T("ORANGE")));
        StyleSetForeground(wxSTC_H_QUESTION, 
          wxTheColourDatabase->Find(_T("LIGHT GREY")));
  
        for (int i = wxSTC_H_SGML_DEFAULT; i <= wxSTC_H_SGML_BLOCK_DEFAULT; i++)
          StyleSetForeground(i, wxTheColourDatabase->Find(_T("SKY BLUE")));
        StyleSetForeground(wxSTC_H_SGML_ENTITY,
          wxTheColourDatabase->Find(_T("ORANGE")));
        StyleSetForeground(wxSTC_H_SGML_SPECIAL, *wxWHITE);
        StyleSetForeground(wxSTC_H_SGML_SIMPLESTRING, 
          wxTheColourDatabase->Find(_T("ORANGE")));
        StyleSetForeground(wxSTC_H_SGML_DEFAULT, 
          wxTheColourDatabase->Find(_T("LIGHT GREY")));
      }
      break;
    case COLOR_SCHEME_NONE:
      baseBackground = LightColour(wxTheColourDatabase->Find(_T("YELLOW")), 20);
      alternateBackground = LightColour(wxTheColourDatabase->Find(_T("YELLOW")), 60);
      SetCaretLineBackground(baseBackground);

      SetSelBackground(true, wxTheColourDatabase->Find(_T("LIGHT GREY")));
      SetCaretForeground(*wxBLACK);

      StyleSetForeground(wxSTC_STYLE_DEFAULT, *wxBLACK);
      StyleSetBackground(wxSTC_STYLE_DEFAULT, *wxWHITE);
      StyleClearAll();
      
      break;
    default:
      break;
  }
  if (type == FILE_TYPE_CSS)
  {
    StyleSetBold(wxSTC_CSS_CLASS, true);
    StyleSetBold(wxSTC_CSS_PSEUDOCLASS, true);
    StyleSetBold(wxSTC_CSS_UNKNOWN_PSEUDOCLASS, true);
    StyleSetBold(wxSTC_CSS_DOUBLESTRING, true);
    StyleSetBold(wxSTC_CSS_SINGLESTRING, true);
    StyleSetBold(wxSTC_CSS_DIRECTIVE, true);
  }
  else
  {
    StyleSetBold(wxSTC_H_XMLSTART, true);
    StyleSetBold(wxSTC_H_XMLEND, true);
    StyleSetBold(wxSTC_H_ATTRIBUTEUNKNOWN, true);
    StyleSetBold(wxSTC_H_ENTITY, true);
    StyleSetBold(wxSTC_H_QUESTION, true);
    StyleSetBold(wxSTC_H_SGML_ENTITY, true);
    StyleSetBold(wxSTC_H_SGML_DEFAULT, true);
  }
  
  applyVisibilityState(visibilityState);
}

void XmlCtrl::applyVisibilityState(int state)
{
  if (type == FILE_TYPE_BINARY)
    return;

  visibilityState = state;

  bool visible;

  // hide tags/attributes
  visible = (state == HIDE_ATTRIBUTES || state == HIDE_TAGS) ? false : true;
  StyleSetVisible(wxSTC_H_OTHER, visible);
  StyleSetVisible(wxSTC_H_ATTRIBUTE, visible);
  StyleSetVisible(wxSTC_H_ATTRIBUTEUNKNOWN, visible);
  StyleSetVisible(wxSTC_H_DOUBLESTRING, visible);
  StyleSetVisible(wxSTC_H_SINGLESTRING, visible);
  
  // hide tags
  visible = (state == HIDE_TAGS) ? false : true;
  StyleSetVisible(wxSTC_H_TAG, visible);
  StyleSetVisible(wxSTC_H_TAGUNKNOWN, visible);
  StyleSetVisible(wxSTC_H_TAGEND, visible);

  StyleSetVisible(wxSTC_H_XMLSTART, visible);
  StyleSetVisible(wxSTC_H_XMLEND, visible);
  StyleSetVisible(wxSTC_H_CDATA, visible);
  StyleSetVisible(wxSTC_H_QUESTION, visible);
  StyleSetVisible(wxSTC_H_COMMENT, visible);
  for (int i = wxSTC_H_SGML_DEFAULT; i <= wxSTC_H_SGML_BLOCK_DEFAULT; i++)
    StyleSetVisible(i, visible);

  Colourise(0, -1);
}

int XmlCtrl::getType()
{
  return type; 
}

void XmlCtrl::foldAll()
{
  expandFoldsToLevel(1, false);
}

void XmlCtrl::unfoldAll()
{
  expandFoldsToLevel(wxSTC_FOLDLEVELNUMBERMASK, true);
}

void XmlCtrl::toggleFold()
{
  int pos, line, level;
  pos = GetCurrentPos();
  if (pos == -1)
    return;
  line = LineFromPosition(pos);
  level = GetFoldLevel(line);
  if (XMLCTRL_HASBIT(level, wxSTC_FOLDLEVELHEADERFLAG))
    ToggleFold(line);
}

// adapted from wxSTEdit (c) 2005 John Labenski, Otto Wyss
void XmlCtrl::expandFoldsToLevel(int level, bool expand)
{
  Colourise(0, -1);

  const int line_n = GetLineCount();
  for (int n = 0; n < line_n; n++)
  {
    int line_level = GetFoldLevel(n);
    if (XMLCTRL_HASBIT(line_level, wxSTC_FOLDLEVELHEADERFLAG))
    {
      line_level -= wxSTC_FOLDLEVELBASE;
      line_level &= wxSTC_FOLDLEVELNUMBERMASK;

      if ((( expand && (line_level <= level)) ||
        (!expand && (line_level >= level))) && (GetFoldExpanded(n) != expand))
        ToggleFold(n);
    }
  }

  EnsureCaretVisible(); // seems to keep it in nearly the same place
}

void XmlCtrl::protectHeadLine()
{
  if (*protectTags || !properties.fold)
    return;

  int pos1, pos2, line1, line2, level;
  pos1 = GetSelectionStart();
  pos2 = GetSelectionEnd();
  line1 = LineFromPosition(pos1);
  line2 = LineFromPosition(pos2);
  
  if (line2 < line1)
  {
    int temp = line1;
    line1 = line2;
    line2 = temp;
  }

  for (int i = line1; i <= line2; i++)
  {
    level = GetFoldLevel(i);
    if (XMLCTRL_HASBIT(level, wxSTC_FOLDLEVELHEADERFLAG) && !GetFoldExpanded(i))
      ToggleFold(i);
  }
}

wxString XmlCtrl::getOpenTag(const wxString& element)
{
  wxString openTag;
  openTag = _T("<") + element;
  std::set<std::string> requiredAttributeSet;
  std::set<std::string>::iterator it;
  std::string key = (const char *)element.mb_str(wxConvUTF8);
  requiredAttributeSet = requiredAttributeMap[key];
  if (!requiredAttributeSet.empty())
  {
    for (it = requiredAttributeSet.begin(); it != requiredAttributeSet.end(); it++)
    {
      openTag += _T(" ");
      openTag += wxString(it->c_str(), wxConvUTF8, it->size());
      openTag += _T("=\"\"");
    }
  }
  openTag += _T(">");
  return openTag;
}

bool XmlCtrl::insertChild(const wxString& child)
{
  int start, end;
  start = GetSelectionStart();
  end = GetSelectionEnd();
  int offset;
  
  wxString openTag, closeTag;

  openTag = getOpenTag(child);
  closeTag = _T("</") + child + _T(">");
  
  if (start == end)
  {
    if (!canInsertAt(start))
      return false;
    //tag = _T("<") + child + _T(">");
    offset = openTag.Length();

    wxString tag;
    tag = openTag + closeTag;
    InsertText(start, tag);
    SetSelection(start + offset, start + offset);
    SetFocus();
    return true;
  }
  if (*protectTags)
    adjustSelection();
  //wxString openTag, closeTag;
  //openTag = _T("<") + child + _T(">");
  //closeTag = _T("</") + child + _T(">");
  offset = openTag.Length();
  if (start > end)
  {
    int temp = end;
    start = end;
    end = temp;
  }
  InsertText(start, openTag);
  InsertText(end + offset, closeTag);
  SetSelection(start + offset, end + offset);
  return true;
}

bool XmlCtrl::insertSibling(const wxString& sibling, const wxString& parent)
{
  int start = GetSelectionStart();
  int limit = GetLength();
  wxString parentCloseTag = _T("</") + parent + _T(">");
  int parentCloseTagStart = FindText(start, limit, parentCloseTag);
  if (parentCloseTagStart == -1 ||
    !canInsertAt(parentCloseTagStart + parentCloseTag.Length()))
    return false;

  int insertionPoint = parentCloseTagStart + parentCloseTag.Length();
  SetSelection(insertionPoint, insertionPoint);
  insertNewLine();

  wxString openTag, closeTag;
  int newCurrentPos, newAdjustedPos;
  newCurrentPos = GetCurrentPos();

  openTag = getOpenTag(sibling);
  closeTag = _T("</") + sibling + _T(">");
  
  InsertText(newCurrentPos, openTag + closeTag);
  newAdjustedPos = newCurrentPos + openTag.Length();
  SetSelection(newAdjustedPos, newAdjustedPos);
  return true;
}

bool XmlCtrl::insertEntity(const wxString& entity)
{
  if (*protectTags)
    adjustCursor();
  
  wxString insertBuffer;
  insertBuffer.Printf(_T("&%s;"), entity.c_str());
  int pos = GetCurrentPos();
  InsertText(GetCurrentPos(), insertBuffer);
  pos += insertBuffer.size();
  SetSelection(pos, pos);
  return true;
}

wxString XmlCtrl::getParent()
{
  int current, parentCloseAngleBracket;
  current = GetCurrentPos();
  parentCloseAngleBracket = getParentCloseAngleBracket(current);
  return getLastElementName(parentCloseAngleBracket);
}

void XmlCtrl::insertNewLine()
{
  bool autoindent = false;
  int pos, line, startPos, iteratorPos, newPos;
  pos = GetCurrentPos();
  line = LineFromPosition(pos);
  startPos = PositionFromLine(line);
  iteratorPos = startPos;
      
  for (iteratorPos = startPos;
    (GetCharAt(iteratorPos) == ' ' ||
      GetCharAt(iteratorPos) == '\t') &&
      iteratorPos < pos;
    ++iteratorPos)
    autoindent = true;
  wxString s = GetTextRange(startPos, iteratorPos);
  NewLine();
  if (autoindent)
  {
    newPos = PositionFromLine(line + 1);
    InsertText(newPos, s);
    SetSelection(newPos + s.size(), newPos + s.size());
  }
}

void XmlCtrl::toggleLineBackground()
{
  if (!properties.toggleLineBackground || visibilityState != HIDE_TAGS)
  {
    if (lineBackgroundState != BACKGROUND_STATE_NORMAL)
    {
      SetCaretLineBackground(baseBackground);
      lineBackgroundState = BACKGROUND_STATE_NORMAL;
    }
    return;
  }
  lineBackgroundState = (lineBackgroundState == BACKGROUND_STATE_NORMAL) ?
      BACKGROUND_STATE_LIGHT : BACKGROUND_STATE_NORMAL;
  SetCaretLineBackground((lineBackgroundState == BACKGROUND_STATE_NORMAL) ? baseBackground : alternateBackground);
}

std::set<std::string> XmlCtrl::getEntitySet()
{
  return entitySet; 
}

bool XmlCtrl::shallowValidate(int maxLine, bool segmentOnly)
{
  if (!properties.validateAsYouType || type != FILE_TYPE_XML)
    return true;

  validationRequired = false;

  if (!maxLine)
    maxLine = GetLineCount();

  std::string bufferUtf8;
  int startLine, columnOffset;
  startLine = columnOffset = 0;

  if (!segmentOnly)
  {
    clearErrorIndicators(maxLine);
    bufferUtf8 = myGetTextRaw();
  }
  else
  {
    int current,
      line,
      lineEnd,
      parentCloseAngleBracket,
      parentStartAngleBracket,
      memory;
    current = GetCurrentPos();
    line = LineFromPosition(current);//PositionFromLine(current);
    
    // try to include next line
    lineEnd = GetLineEndPosition(line + 1);
    if (lineEnd == -1)
      lineEnd = GetLineEndPosition(line);

    // fetch parent
    parentCloseAngleBracket = getParentCloseAngleBracket(current);
    parentStartAngleBracket = getTagStartPos(parentCloseAngleBracket);
    if (parentStartAngleBracket == -1)
      return false;
    
    memory = parentStartAngleBracket;

    // fetch grandparent if not at start of document
    if (parentStartAngleBracket > 1)
    {
      parentCloseAngleBracket =
        getParentCloseAngleBracket(parentStartAngleBracket - 1);
      parentStartAngleBracket = getTagStartPos(parentCloseAngleBracket);
      if (parentStartAngleBracket == -1)
        parentStartAngleBracket = memory;
    }

    startLine = LineFromPosition(parentStartAngleBracket);
      
    if (startLine == line)
    {
      columnOffset = parentStartAngleBracket - PositionFromLine(line);

      // disallow negative offsets
      if (columnOffset < 0)
        columnOffset = 0;
    }

    // sanity-check range
    if (lineEnd <= parentStartAngleBracket)
      return false;

    // clear indicators within range
    StartStyling(parentStartAngleBracket, wxSTC_INDIC2_MASK);
    int length = lineEnd - parentStartAngleBracket;
    SetStyling(length, 0);

    // tweak raw getTextRange variant
    wxString wideBuffer = GetTextRange(parentStartAngleBracket, lineEnd);
    
    bufferUtf8 = (const char *)wideBuffer.mb_str(wxConvUTF8);
  }

  return shallowValidate(bufferUtf8.c_str(), bufferUtf8.size(), startLine,
    maxLine, columnOffset, segmentOnly);
/*
  bool res = validator->parse(bufferUtf8, (segmentOnly) ? false : true);
  if (!validator->getOverrideFailure() && (!res || !validator->isValid()))
  {
    std::vector<std::pair<int, int> > positionVector = validator->getPositionVector();

    if (res == XML_STATUS_ERROR)
    {
      positionVector.push_back(validator->getErrorPosition());
    }
    
    std::vector<std::pair<int, int> >::iterator it;
    for (it = positionVector.begin(); it != positionVector.end(); it++)
    {
      int line, column;
      line = (it->first - 1) + startLine;
      column = it->second + columnOffset;
      setErrorIndicator(line, column);
    }
    return false;
  }
  return true;
*/
}

bool XmlCtrl::shallowValidate(const char *buffer,
  size_t bufferLen,
  int startLine,
  int maxLine,
  int columnOffset,
  bool segmentOnly)
{
  std::auto_ptr<XmlShallowValidator> validator(new XmlShallowValidator(
    elementMap,
    attributeMap,
    requiredAttributeMap,
    entitySet,
    maxLine,
    segmentOnly));

  bool res = validator->parse(buffer, bufferLen, (segmentOnly) ? false : true);
  if (!validator->getOverrideFailure() && (!res || !validator->isValid()))
  {
    std::vector<std::pair<int, int> > positionVector = validator->getPositionVector();

    if (res == XML_STATUS_ERROR)
    {
      positionVector.push_back(validator->getErrorPosition());
    }
    
    std::vector<std::pair<int, int> >::iterator it;
    for (it = positionVector.begin(); it != positionVector.end(); it++)
    {
      int line, column;
      line = (it->first - 1) + startLine;
      column = it->second + columnOffset;
      setErrorIndicator(line, column);
    }
    return false;
  }
  return true;
}

std::string XmlCtrl::myGetTextRaw()
{
  int len  = GetTextLength();
  char *buf = new char[len+1];
  SendMsg(2182, len+1, (long)buf);
  buf[len] = '\0';
  std::string ret(buf);
  delete[] buf;
  return ret;
}

void XmlCtrl::setErrorIndicator(int line, int column)
{
  int startPos, endPos;
  startPos = PositionFromLine(line) + column;
  endPos = GetLineEndPosition(line);
  StartStyling(startPos, wxSTC_INDIC2_MASK);

  int length = endPos - startPos;

	/*
	from CellBuffer.cxx:
  PLATFORM_ASSERT(lengthStyle == 0 ||
		(lengthStyle > 0 && lengthStyle + position < length));
	*/

  if (length == 0 || (length > 0 && length + startPos < GetLength()))
  {
    SetStyling(length, wxSTC_INDIC2_MASK);
  }
}

void XmlCtrl::clearErrorIndicators(int maxLine)
{
  if (maxLine < 1)
    return;

  int documentLength = GetLength();
  if (!documentLength)
    return;

  StartStyling(0, wxSTC_INDIC2_MASK);
  
  int length;
  length = (maxLine) ? GetLineEndPosition(maxLine) : documentLength;
  SetStyling(length, 0);
}

bool XmlCtrl::getValidationRequired()
{
  return validationRequired;
}

void XmlCtrl::setValidationRequired(bool b)
{
  validationRequired = b;
}

int XmlCtrl::getTagType(int pos)
{
  int iteratorPos;

  // preliminary checks
  if (pos < 2)
  {
    return TAG_TYPE_ERROR;
  }
  else if (GetCharAt(pos - 1) == '/')
  {
    return TAG_TYPE_EMPTY;
  }
  
  // go to start of tag
  for (iteratorPos = pos; iteratorPos >= 0; --iteratorPos)
  {
    int style = getLexerStyleAt(iteratorPos);
    //style &= ~wxSTC_INDIC2_MASK;

    if (GetCharAt(iteratorPos) == '<' &&
      (style == wxSTC_H_TAG || style == wxSTC_H_TAGUNKNOWN))
      break;
  }
  if (GetCharAt(iteratorPos) != '<')
    return TAG_TYPE_ERROR;

  char c = GetCharAt(iteratorPos + 1);
  if (c == '!' || c == '?')
    return TAG_TYPE_OTHER;
  else if (c == '/')
  {
    return TAG_TYPE_CLOSE;
  }
  else
  {
    return TAG_TYPE_OPEN;
  }
}

// fetch style int disregarding indicator
int XmlCtrl::getLexerStyleAt(int pos)
{
  int style = GetStyleAt(pos);
  style &= ~wxSTC_INDIC2_MASK;
  return style;
}

bool XmlCtrl::getDtdFound()
{
  return dtdFound;
}

void XmlCtrl::OnMiddleDown(wxMouseEvent& event)
{
  if (GetSelectionStart() == GetSelectionEnd())
  {
    event.Skip();
    return;
  }
  Copy();
  long x, y;
  event.GetPosition(&x, &y);
  int pastePosition = PositionFromPointClose(x, y);
  if (pastePosition == wxSTC_INVALID_POSITION)
  {
    event.Skip();
    return;
  }
  SetSelection(pastePosition, pastePosition);
  Paste();
}