private TemplateHtmlAttribute ReadAttribute()
{
var sb = new StringBuilder();
string name;
while (_index < _source.Length)
{
if (Current == ' ' || Current == '=' || Current == '>' || (Current == '/' && Next == '>'))
{
PassOptionalWhitespace();
if (Current != '=')
{//没有值的属性：disabled,readonly等，转换后disabled="disabled"。
name = sb.ToString().Trim();
return(new TemplateHtmlAttribute(name, name));
}
_index++;
break;
}
sb.Append(Current);
_index++;
}
name = sb.ToString().Trim();
PassOptionalWhitespace();
//属性引号
var quote = Current;
if (quote != '\'' && quote != '"')
{
quote = ' ';
}
else
{
_index++;
}
if (Current == '{' && Next == '{')
{ //代码段
var attribute = new TemplateHtmlCodeAttribute(name, ReadCode());
_index++; //跳过属性引号
PassOptionalWhitespace();
return(attribute);
}
sb = new StringBuilder();
while (_index < _source.Length)
{
if (Current == quote || Current == '>' || (Current == '/' && Next == '>'))
{
if (Current == quote)
{
_index++;
}
break;
}
sb.Append(Current);
_index++;
}
PassOptionalWhitespace();
return(new TemplateHtmlAttribute(name, sb.ToString()));
}
/// <summary>
/// 通过当前对象执行属性所得到的字符串。
/// </summary>
/// <param name="attribute">属性实例对象。</param>
/// <param name="result">当前原有的属性列表。</param>
/// <param name="instance">当前实例对象。</param>
public void Execute(TemplateHtmlCodeAttribute attribute, Dictionary <string, string> result, object instance)
{
var value = attribute.Value?.Trim();
if (!string.IsNullOrWhiteSpace(value))
{
var isTrue = (bool)TemplateExpression.Execute(value, instance);
if (isTrue)
{
result[attribute.AttributeName] = attribute[0].Trim('\'');
}
else if (attribute.Count == 2)
{
result[attribute.AttributeName] = attribute[1].Trim('\'');
}
}
}
/// <summary>
/// 通过当前对象执行属性所得到的字符串。
/// </summary>
/// <param name="attribute">属性实例对象。</param>
/// <param name="result">当前原有的属性列表。</param>
/// <returns>返回脚本代码</returns>
public string Execute(TemplateHtmlCodeAttribute attribute, Dictionary <string, string> result)
{
var sb = new StringBuilder();
if (result.TryGetValue(attribute.AttributeName, out var value))
{
result.Remove(attribute.AttributeName);
}
sb.Append("if(")
.Append(attribute.Value)
.Append("){")
.MergeJsAttribute(attribute.AttributeName, attribute[0], value)
.Append("}");
if (attribute.Count == 2)
{
sb.Append("else{")
.MergeJsAttribute(attribute.AttributeName, attribute[1], value)
.Append("}");
}
return(sb.ToString());
}
/// <summary>
/// 通过当前对象执行属性所得到的字符串。
/// </summary>
/// <param name="attribute">属性实例对象。</param>
/// <param name="result">当前原有的属性列表。</param>
/// <returns>返回脚本代码</returns>
public string Execute(TemplateHtmlCodeAttribute attribute, Dictionary <string, string> result)
{
var sb = new StringBuilder();
if (result.TryGetValue(attribute.AttributeName, out var value))
{
result.Remove(attribute.AttributeName);
}
sb.Append("if(")
.Append(attribute.Value)
.Append("){")
.SetJsAttribute(attribute.AttributeName, attribute[0]);
if (attribute.Count == 2)
{
sb.Append("}else{").SetJsAttribute(attribute.AttributeName, attribute[1]);
}
else if (!string.IsNullOrWhiteSpace(value))
{
sb.Append("}else{").SetJsAttribute(attribute.AttributeName, value);
}
sb.Append("}");
return(sb.ToString());
}