private string ExtractArgument()
{
//Extracts text delimited by BraceStart and BraceEnd
//First char must be a BraceStart
int aByte = -1;
char ch;
StringBuilder str_ctrl_word = new StringBuilder();
int counter = 1;
aByte = TextReader.Read();
if (aByte == -1)
{
return(String.Empty);
}
ch = (char)aByte;
TeXControlWordType ctrl_word_type = TeXControlWordType.Find(ch);
if (ctrl_word_type.Types != TeXControlWordType.Type.BraceStart)
{
return(String.Empty);
}
while (aByte != -1 && counter != 0)
{
aByte = TextReader.Read();
ch = (char)aByte;
ctrl_word_type = TeXControlWordType.Find(ch);
if (ctrl_word_type.Types == TeXControlWordType.Type.BraceStart)
{
counter++;
}
else if (ctrl_word_type.Types == TeXControlWordType.Type.BraceEnd)
{
counter--;
}
// Comment character -> skip to the end of line
else if (ctrl_word_type.Types == TeXControlWordType.Type.Comment)
{
TextReader.ReadLine();
}
else if (counter > 0)
{
str_ctrl_word.Append(ch);
}
}
return(str_ctrl_word.ToString());
}
private ErrorCodes HandleControlWord(string str_ctrl_word)
{
string str_temp;
TeXControlWordType new_ctrl_word_type;
TeXControlWordType ctrl_word_type = TeXControlWordType.Find(str_ctrl_word.ToString());
switch (ctrl_word_type.Types)
{
case TeXControlWordType.Type.MetaDataTag:
if (env_data_stack.Count > 0)
{
str_temp = (string)env_data_stack.Peek();
new_ctrl_word_type = TeXControlWordType.Find(str_temp);
switch (new_ctrl_word_type.Types)
{
case TeXControlWordType.Type.BlockBegin:
AppendWord(str_block_sb.ToString());
str_block_sb.Length = 0;
break;
case TeXControlWordType.Type.BlockEnd:
str_temp = str_block_sb.ToString().Trim();
AddProperty(Beagle.Property.New("dc:" + str_ctrl_word, str_temp));
str_block_sb.Length = 0;
/*Assuming everything is fine (closed begin-end pairs), discard 2
* objects (current environment, begin) */
for (int i = 0; i < 2; i++)
{
env_data_stack.Pop();
}
break;
default:
str_temp = ExtractArgument().Trim();
AddProperty(Beagle.Property.New("dc:" + str_ctrl_word, str_temp));
break;
}
}
else
{
str_temp = ExtractArgument().Trim();
AddProperty(Beagle.Property.New("dc:" + str_ctrl_word, str_temp));
}
break;
case TeXControlWordType.Type.EscSeq:
break;
case TeXControlWordType.Type.BlockBegin:
env_data_stack.Push(str_ctrl_word);
HandleControlWord(ExtractArgument());
AppendWord(str_block_sb.ToString());
str_block_sb.Length = 0;
break;
case TeXControlWordType.Type.BlockEnd:
env_data_stack.Push(str_ctrl_word);
HandleControlWord(ExtractArgument());
break;
case TeXControlWordType.Type.Document:
if (env_data_stack.Count > 0)
{
str_temp = (string)env_data_stack.Peek();
new_ctrl_word_type = TeXControlWordType.Find(str_temp);
switch (new_ctrl_word_type.Types)
{
case TeXControlWordType.Type.BlockBegin:
//TeX files have no document environment, so the following
//doesn't index them at all.
str_block_sb.Length = 0;
break;
case TeXControlWordType.Type.BlockEnd:
AppendWord(str_block_sb.ToString());
str_block_sb.Length = 0;
break;
default:
Log.Error("ERROR: document is a block environment");
break;
}
}
else
{
Log.Error("ERROR: document is a block environment");
}
env_data_stack.Push(str_ctrl_word);
break;
case TeXControlWordType.Type.Hot:
//There needn't exist an enclosing environment (TeX)
if (env_data_stack.Count > 0)
{
str_temp = (string)env_data_stack.Peek();
new_ctrl_word_type = TeXControlWordType.Find(str_temp);
switch (new_ctrl_word_type.Types)
{
case TeXControlWordType.Type.BlockBegin:
AppendWord(str_block_sb.ToString());
str_block_sb.Length = 0;
break;
case TeXControlWordType.Type.BlockEnd:
HotUp();
AppendWord(str_block_sb.ToString());
str_block_sb.Length = 0;
HotDown();
break;
default:
HotUp();
//Console.WriteLine("content: {0}, {1}", ExtractArgument(), str_temp);
AppendWord(ExtractArgument());
HotDown();
break;
}
}
else
{
HotUp();
//Console.WriteLine("content: {0}, {1}", ExtractArgument(), str_temp);
AppendWord(ExtractArgument());
HotDown();
}
break;
case TeXControlWordType.Type.Bibitem:
ExtractArgument();
break;
case TeXControlWordType.Type.None:
if (env_data_stack.Count > 0)
{
new_ctrl_word_type = TeXControlWordType.Find((string)env_data_stack.Peek());
if (new_ctrl_word_type.Types == TeXControlWordType.Type.BlockBegin ||
new_ctrl_word_type.Types == TeXControlWordType.Type.BlockEnd)
{
env_data_stack.Pop();
}
if (new_ctrl_word_type.Types == TeXControlWordType.Type.MathMode)
{
str_block_sb.Append("\\" + str_ctrl_word + ' ');
}
}
//Check unknown macros
//Console.WriteLine ("Unimplemented macro: {0}", str_ctrl_word.ToString());
break;
}
return(ErrorCodes.ERROR_TEX_OK);
}
