This commit was manufactured by cvs2svn to create branch

[helm.git] / helm / DEVEL / mathml_editor / src / TPushLexer.cc

diff --git a/helm/DEVEL/mathml_editor/src/TPushLexer.cc b/helm/DEVEL/mathml_editor/src/TPushLexer.cc
deleted file mode 100644 (file)
index da15822..0000000
--- a/helm/DEVEL/mathml_editor/src/TPushLexer.cc
+++ /dev/null
@@ -1,207 +0,0 @@
-/* This file is part of EdiTeX, an editor of mathematical
- * expressions based on TeX syntax.
- * 
- * Copyright (C) 2002-2003 Luca Padovani <lpadovan@cs.unibo.it>,
- *                    2003 Paolo Marinelli <pmarinel@cs.unibo.it>.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- *
- * For more information, please visit the project's home page
- * http://helm.cs.unibo.it/editex/
- * or send an email to <lpadovan@cs.unibo.it>
- */
-
-#include <string>
-#include <cctype>
-#include <cassert>
-
-#include "TToken.hh"
-#include "TPushLexer.hh"
-#include "APushParser.hh"
-
-TPushLexer::TPushLexer(ALogger& l, APushParser& p) : APushLexer(l, p)
-{
-  state = ACCEPT;
-}
-
-void
-TPushLexer::reset()
-{
-  buffer.erase();
-  state = ACCEPT;
-
-  displayCursor();
-}
-
-void
-TPushLexer::flush()
-{
-  push(-1);
-}
-
-void
-TPushLexer::transaction(char ch, State newState)
-{
-  switch (ch)
-    {
-    case '{': parser.push(TToken(TToken::BEGIN)); break;
-    case '}': parser.push(TToken(TToken::END)); break;
-    case '$': parser.push(TToken(TToken::SHIFT)); break;
-    case '&': parser.push(TToken(TToken::ALIGN)); break;
-    case '\n':
-    case '\r': parser.push(TToken(TToken::EOL, ch)); break;
-    case '^': parser.push(TToken(TToken::SUPERSCRIPT)); break;
-    case '_': parser.push(TToken(TToken::SUBSCRIPT)); break;
-    case '\t':
-    case ' ': parser.push(TToken(TToken::IGNORABLE_SPACE, ch)); break;
-    case '~': parser.push(TToken(TToken::ACTIVE, ch)); break;
-    case '%': parser.push(TToken(TToken::COMMENT)); break;     
-    default:
-      if (isalpha(ch)) parser.push(TToken(TToken::LETTER, ch));
-      else if (isdigit(ch)) parser.push(TToken(TToken::DIGIT, ch));
-      else parser.push(TToken(TToken::OTHER, ch));
-      break;
-    }
-  state = newState;
-}
-
-void
-TPushLexer::push(char ch)
-{
-  switch (state)
-    {
-    case ACCEPT:
-      if (ch == '\\') state = ESCAPE;
-      else if (ch == '#') state = PARAMETER;
-      else if (ch == -1) ;
-      else transaction(ch, ACCEPT);
-      break;
-    case ESCAPE:
-      if (isalpha(ch))
-       {
-         buffer.push_back(ch);
-         state = MACRO;
-       }
-      else if (ch == -1) error();
-      else
-       {
-         parser.push(TToken(TToken::CONTROL, ch));
-         state = ACCEPT;
-       }
-      break;
-    case MACRO:
-      if (ch == '\\')
-       {
-         parser.push(TToken(TToken::CONTROL, buffer));
-         buffer.erase();
-         state = ESCAPE;
-       }
-      else if (ch == '#')
-       {
-         parser.push(TToken(TToken::CONTROL, buffer));
-         buffer.erase();
-         state = PARAMETER;
-       }
-      else if (isalpha(ch))
-       buffer.push_back(ch);
-      else if (ch == -1)
-        {
-         parser.push(TToken(TToken::CONTROL, buffer));
-         buffer.erase();
-         state = ACCEPT;
-       }
-      else
-       {
-         parser.push(TToken(TToken::CONTROL, buffer));
-         buffer.erase();
-         if (isspace(ch)) state = IGNORE_SPACE;
-         else transaction(ch, ACCEPT);
-       }
-      break;
-    case IGNORE_SPACE:
-      if (ch == '\\') state = ESCAPE;
-      else if (ch == '#') state = PARAMETER;
-      else if (isspace(ch)) ;
-      else if (ch == -1) state = ACCEPT;
-      else transaction(ch, ACCEPT);
-      break;
-    case PARAMETER:
-      if (ch == -1) error();
-      else
-        {
-         parser.push(TToken(TToken::PARAMETER, ch));
-         state = ACCEPT;
-       }
-      break;
-    default:
-      assert(0);
-      break;
-    }
-
-  displayCursor();
-
-}
-
-void
-TPushLexer::drop(bool alt)
-{
-  std::string restore = "";
-
-  switch (state)
-    {
-    case ACCEPT:
-    case IGNORE_SPACE:
-      restore = parser.drop(alt);
-      if (restore.length() > 0 && restore[0] == '\\')
-       {
-         buffer = std::string(restore, 1, restore.length() - 1);
-         state = (buffer.length() > 0) ? MACRO : ESCAPE;
-       }
-      break;
-    case ESCAPE:
-      state = ACCEPT;
-      break;
-    case MACRO:
-      if (alt) buffer.erase();
-      else buffer.erase(buffer.length() - 1, 1);
-      if (buffer.length() == 0) state = ESCAPE;
-      break;
-    case PARAMETER:
-    default:
-      assert(0);
-      break;
-    }
-
-  displayCursor();
-
-}
-
-void
-TPushLexer::displayCursor()
-{
-  switch (state)
-    {
-    case ESCAPE: parser.setCursorHint("\\"); break;
-    case MACRO: parser.setCursorHint("\\" + buffer); break;
-    case PARAMETER: parser.setCursorHint("#"); break;
-    default: parser.setCursorHint(""); break;
-    }
-}
-
-bool
-TPushLexer::error() const
-{
-  return false;
-}