/// <summary>
/// faild parse return null, otherwise return DataBindIfExpress
/// </summary>
/// <param name="express"></param>
/// <returns></returns>
public static IfDataBindExpress Parse(string express)
{
var ifExp = new IfDataBindExpress();
ifExp.express = express;
ifExp.objectExpress = ObjectDataBindExpress.Parse(express);
return(ifExp.objectExpress != null ? ifExp : null);
}
/// <summary>
/// fail return null
/// </summary>
/// <returns></returns>
public static AttributeDataBindExpress Parse(string express, string targetName)
{
if ("".Equals(targetName))
{
return(null);
}
var attributeExpress = new AttributeDataBindExpress();
attributeExpress.TargetName = targetName;
attributeExpress.express = express;
attributeExpress.objectExpress = ObjectDataBindExpress.Parse(express);
return(attributeExpress.objectExpress != null ? attributeExpress : null);
}
/// <summary>
/// faild parse return null, otherwise return DataBindObjectExpress
/// </summary>
/// <param name="express"></param>
/// <returns></returns>
public static ObjectDataBindExpress Parse(string express)
{
try
{
var dboe = new ObjectDataBindExpress();
dboe.ast = new Expr.Parser().Parse(express);
dboe.express = express;
return(dboe);
}
catch
{
}
return(null);
}
/// <summary>
/// faild parse return null, otherwise return DataBindObjectExpress
/// </summary>
/// <param name="express"></param>
/// <returns></returns>
public static ForDataBindExpress Parse(string express)
{
if (express == null)
{
return(null);
}
express = express.Trim();
int index = express.IndexOf(forInToken);
if (index < 0)
{
return(null);
}
var forExp = new ForDataBindExpress();
forExp.express = express;
forExp.IteratorName = express.Substring(0, index).Trim();
forExp.objectExpress = ObjectDataBindExpress.Parse(express.Substring(index + 2).Trim());
return(forExp.objectExpress != null ? forExp : null);
}
/// <summary>
/// fail return null
/// </summary>
/// <returns></returns>
public static TextDataBindExpress Parse(string input)
{
if (input == null || "".Equals(input))
{
return(null);
}
List <RawTextToken> rawList = new List <RawTextToken>();
for (int i = 0; i < input.Length; i++)
{
var curr = input[i];
if (curr == '{' && i + 1 < input.Length && input[i + 1] == '{')
{
rawList.Add(new RawTextToken(-1, ' '));
i++;
}
else if (curr == '}' && i + 1 < input.Length && input[i + 1] == '}')
{
rawList.Add(new RawTextToken(1, ' '));
i++;
}
else
{
rawList.Add(new RawTextToken(0, curr));
}
}
// RawTextToken to TextToken
List <TextToken> tokenList = new List <TextToken>();
for (int i = 0; i < rawList.Count;)
{
if (rawList[i].type == -1)
{
int startIndex = i + 1;
i++;
while (i < rawList.Count && rawList[i].type != 1)
{
i++;
}
var str = RawTextToken.ToString(rawList, startIndex, i - startIndex);
if (i == rawList.Count) // EOF
{
// normal text
tokenList.Add(new TextToken(str));
break;
}
var express = ObjectDataBindExpress.Parse(str);
if (express != null)
{
tokenList.Add(new TextToken(express));
}
i++;
}
else
{
int startIndex = i;
while (i < rawList.Count && rawList[i].type != -1)
{
i++;
}
int length = i - startIndex;
if (length > 0)
{
var str = RawTextToken.ToString(rawList, startIndex, length);
tokenList.Add(new TextToken(str));
}
}
}
return(tokenList.Count > 0 ? new TextDataBindExpress(tokenList) : null);
}
public TextToken(ObjectDataBindExpress express)
{
IsText = false;
this.Express = express;
this.Text = null;
}
public TextToken(string text)
{
IsText = true;
this.Express = null;
this.Text = text;
}
