private void ParseText(char ch, StiRtfToken token)
{
StringBuilder text = new StringBuilder(ch.ToString());
int c = rtf.Peek();
while (c == '\r' || c == '\n' || c == '\t' || c == '\0')
{
rtf.Read();
c = rtf.Peek();
}
while (c != '\\' && c != '}' && c != '{' && c != Eof)
{
rtf.Read();
text.Append((char)c);
c = rtf.Peek();
while (c == '\r' || c == '\n' || c == '\t' || c == '\0')
{
rtf.Read();
c = rtf.Peek();
}
}
token.Key = text.ToString();
}
internal StiRtfTreeNode(StiRtfToken token)
{
this.children = new StiRtfNodeCollection();
this.type = (StiRtfNodeType)token.Type;
this.key = token.Key;
this.hasParam = token.HasParameter;
this.param = token.Parameter;
}
public StiRtfToken NextToken()
{
int c;
StiRtfToken token = new StiRtfToken();
c = rtf.Read();
while (c == '\r' || c == '\n' || c == '\t' || c == '\0')
{
c = rtf.Read();
}
if (c != Eof)
{
switch (c)
{
case '{':
token.Type = StiRtfTokenType.GroupStart;
break;
case '}':
token.Type = StiRtfTokenType.GroupEnd;
break;
case '\\':
ParseKeyword(token);
break;
default:
token.Type = StiRtfTokenType.Text;
ParseText((char)c, token);
break;
}
}
else
{
token.Type = StiRtfTokenType.Eof;
}
return(token);
}
private void ParseKeyword(StiRtfToken token)
{
int c = rtf.Peek();
#region Special character or control symbol
if (!Char.IsLetter((char)c))
{
rtf.Read();
if (c == '\\' || c == '{' || c == '}')
{
//Special character
token.Type = StiRtfTokenType.Text;
token.Key = ((char)c).ToString();
}
else
{
//Control symbol
token.Type = StiRtfTokenType.Control;
token.Key = ((char)c).ToString();
if (token.Key == "\'")
{
string code = string.Format("{0}{1}", (char)rtf.Read(), (char)rtf.Read());
token.HasParameter = true;
token.Parameter = Convert.ToInt32(code, 16);
}
}
return;
}
#endregion
#region Keyword
StringBuilder keyWord = new StringBuilder();
c = rtf.Peek();
while (Char.IsLetter((char)c))
{
rtf.Read();
keyWord.Append((char)c);
c = rtf.Peek();
}
token.Type = StiRtfTokenType.Keyword;
token.Key = keyWord.ToString();
#endregion
#region Parameter
if (Char.IsDigit((char)c) || c == '-')
{
token.HasParameter = true;
bool negative = false;
if (c == '-')
{
negative = true;
rtf.Read();
}
StringBuilder paramStr = new StringBuilder();
c = rtf.Peek();
while (Char.IsDigit((char)c))
{
rtf.Read();
paramStr.Append((char)c);
c = rtf.Peek();
}
int paramInt = Convert.ToInt32(paramStr.ToString());
if (negative)
{
paramInt = -paramInt;
}
token.Parameter = paramInt;
}
#endregion
if (c == ' ')
{
rtf.Read();
}
}
private int ParseRtfTree()
{
int res = 0;
int level = 0;
int tokensCount = 0;
int delayCount = 0;
Encoding encoding = Encoding.Default;
StiRtfTreeNode curNode = rootNode;
StiRtfTreeNode newNode = null;
StiRtfToken tok = lex.NextToken();
while (tok.Type != StiRtfTokenType.Eof)
{
tokensCount++;
switch (tok.Type)
{
case StiRtfTokenType.GroupStart:
newNode = new StiRtfTreeNode(StiRtfNodeType.Group, "GROUP", false, 0);
curNode.AppendChild(newNode);
curNode = newNode;
level++;
break;
case StiRtfTokenType.GroupEnd:
newNode = new StiRtfTreeNode(StiRtfNodeType.GroupEnd, "GROUPEND", false, 0);
curNode.AppendChild(newNode);
curNode = curNode.ParentNode;
//newNode = new StiRtfTreeNode(StiRtfNodeType.None, "NoneAfterGroup", false, 0);
//curNode.AppendChild(newNode);
level--;
//show progress
if (delayCount == 0)
{
delayCount = 8;
}
else
{
delayCount--;
}
break;
case StiRtfTokenType.Keyword:
case StiRtfTokenType.Control:
case StiRtfTokenType.Text:
if (mergeSpecialCharacters)
{
bool isText = tok.Type == StiRtfTokenType.Text || (tok.Type == StiRtfTokenType.Control && tok.Key == "'");
if (curNode.LastChild != null && (curNode.LastChild.NodeType == StiRtfNodeType.Text && isText))
{
if (tok.Type == StiRtfTokenType.Text)
{
curNode.LastChild.NodeKey += tok.Key;
break;
}
if (tok.Type == StiRtfTokenType.Control && tok.Key == "'")
{
curNode.LastChild.NodeKey += DecodeControlChar(tok.Parameter, encoding);
break;
}
}
else
{
if (tok.Type == StiRtfTokenType.Control && tok.Key == "'")
{
newNode = new StiRtfTreeNode(StiRtfNodeType.Text, DecodeControlChar(tok.Parameter, encoding), false, 0);
curNode.AppendChild(newNode);
break;
}
}
}
newNode = new StiRtfTreeNode(tok);
curNode.AppendChild(newNode);
if (mergeSpecialCharacters)
{
if (level == 1 && newNode.NodeType == StiRtfNodeType.Keyword && newNode.NodeKey == "ansicpg")
{
encoding = Encoding.GetEncoding(newNode.Parameter);
}
}
break;
default:
res = -1;
break;
}
tok = lex.NextToken();
}
rootNode.UpdateNodeIndex(true);
if (level != 0)
{
res = -1;
}
return(res);
}