public Tag Parse(TemplateParser parser, TokenCollection tc)
{
//支持写法：简写格式：
//常规格式：
if (tc.Count > 5 &&
Common.ParserHelpers.IsEqual(tc.First.Text, Field.KEY_SET) &&
tc[1].TokenKind == TokenKind.LeftParentheses &&
tc[3].Text == "=" &&
tc.Last.TokenKind == TokenKind.RightParentheses)
{
SetTag tag = new SetTag();
tag.Name = tc[2].Text;
TokenCollection coll = new TokenCollection();
coll.Add(tc, 4, tc.Count - 2);
tag.Value = parser.Read(coll);
return(tag);
}
else if (tc.Count == 2 &&
tc.First.TokenKind == TokenKind.TextData &&
tc.Last.TokenKind == TokenKind.Operator &&
(tc.Last.Text == "++" || tc.Last.Text == "--"))
{
SetTag tag = new SetTag();
tag.Name = tc.First.Text;
ExpressionTag c = new ExpressionTag();
c.AddChild(new VariableTag()
{
FirstToken = tc.First,
Name = tc.First.Text
});
c.AddChild(new TextTag()
{
FirstToken = new Token(TokenKind.Operator, tc.Last.Text[0].ToString())
});
c.AddChild(new NumberTag()
{
Value = 1,
FirstToken = new Token(TokenKind.Number, "1")
});
tag.Value = c;
return(tag);
}
else if (tc.Count > 2 &&
tc.First.TokenKind == TokenKind.TextData &&
tc[1].Text == "=")
{
SetTag tag = new SetTag();
tag.Name = tc.First.Text;
TokenCollection coll = new TokenCollection();
coll.Add(tc, 2, tc.Count - 1);
tag.Value = parser.Read(coll);
return(tag);
}
return(null);
}
public Tag Parse(TemplateParser parser, TokenCollection tc)
{
if (tc.Count > 2 && HasOperator(tc))
{
Int32 start, end, pos;
start = end = pos = 0;
#region 去括号
//(8+2) ==》 8+2
//(8+2) * (10-5) ==》(8+2) * (10-5)
if (tc.First.TokenKind == TokenKind.LeftParentheses && tc.Last.TokenKind == TokenKind.RightParentheses)
{
for (Int32 i = 1; i < tc.Count - 1; i++)
{
switch (tc[i].TokenKind)
{
case TokenKind.LeftParentheses:
pos++;
break;
case TokenKind.RightParentheses:
if (pos > 0)
{
pos--;
}
break;
}
}
if (pos == 0)
{
tc = new TokenCollection(tc, 1, tc.Count - 2);
}
else
{
pos = 0;
}
}
#endregion
ExpressionTag tag = new ExpressionTag();
#region 执行表达式折分
for (Int32 i = 0; i < tc.Count; i++)
{
end = i;
switch (tc[i].TokenKind)
{
case TokenKind.Operator:
if (pos == 0)
{
if (start != end)
{
TokenCollection coll = new TokenCollection();
coll.Add(tc, start, end - 1);
tag.AddChild(parser.Read(coll));
}
tag.AddChild(new TextTag());
tag.Children[tag.Children.Count - 1].FirstToken = tc[i];
start = i + 1;
}
break;
default:
if (tc[i].TokenKind == TokenKind.LeftParentheses)
{
pos++;
}
else if (tc[i].TokenKind == TokenKind.RightParentheses)
{
pos--;
}
if (i == tc.Count - 1)
{
TokenCollection coll = new TokenCollection();
if (tc[start].TokenKind == TokenKind.RightParentheses)
{
coll.Add(tc, start + 1, end - 1);
}
else
{
coll.Add(tc, start, end);
}
start = i + 1;
if (coll.Count > 0)
{
tag.AddChild(parser.Read(coll));
}
}
break;
}
}
#endregion
if (tag.Children.Count > 0)
{
if (tag.Children.Count == 1)
{
return(tag.Children[0]);
}
return(tag);
}
}
return(null);
}
public Tag Parse(TemplateParser parser, TokenCollection tc)
{
if (tc.Count > 3 && Common.ParserHelpers.IsEqual(Field.KEY_FOR, tc.First.Text))
{
if (tc[1].TokenKind == TokenKind.LeftParentheses &&
tc.Last.TokenKind == TokenKind.RightParentheses)
{
Int32 pos = 0,
start = 2,
end;
List <Tag> ts = new List <Tag>(3);
ForTag tag = new ForTag();
for (Int32 i = 2; i < tc.Count - 1; i++)
{
end = i;
if (tc[i].TokenKind == TokenKind.Punctuation && tc[i].Text == ";")
{
if (pos == 0)
{
TokenCollection coll = new TokenCollection();
coll.Add(tc, start, end - 1);
if (coll.Count > 0)
{
ts.Add(parser.Read(coll));
}
else
{
ts.Add(null);
}
start = i + 1;
continue;
}
}
if (tc[i].TokenKind == TokenKind.LeftParentheses)
{
pos++;
}
else if (tc[i].TokenKind == TokenKind.RightParentheses)
{
pos--;
}
if (i == tc.Count - 2)
{
TokenCollection coll = new TokenCollection();
coll.Add(tc, start, end);
if (coll.Count > 0)
{
ts.Add(parser.Read(coll));
}
else
{
ts.Add(null);
}
}
}
if (ts.Count != 3)
{
throw new Exception.ParseException(String.Concat("syntax error near for:", tc), tc.First.BeginLine, tc.First.BeginColumn);
}
tag.Initial = ts[0];
tag.Test = ts[1];
tag.Do = ts[2];
while (parser.MoveNext())
{
tag.Children.Add(parser.Current);
if (parser.Current is EndTag)
{
return(tag);
}
}
throw new Exception.ParseException(String.Concat("for is not properly closed by a end tag:", tc), tc.First.BeginLine, tc.First.BeginColumn);
}
else
{
throw new Exception.ParseException(String.Concat("syntax error near for:", tc), tc.First.BeginLine, tc.First.BeginColumn);
}
}
return(null);
}
