public bool SetAttribute(string name, string value, AttributeMergeStrategy mergeStrategy = AttributeMergeStrategy.Rename)
{
if (ContainsKey(name))
{
if (name == "Text")
{
mergeStrategy = AttributeMergeStrategy.Append;
}
if (name == "style" && value == this[name])
{
mergeStrategy = AttributeMergeStrategy.Skip;
}
switch (mergeStrategy)
{
case AttributeMergeStrategy.Merge:
if (value != GetAttribute(name))
{
return(false);
}
return(true);
case AttributeMergeStrategy.Overwrite:
RemoveAttribute(name);
break;
case AttributeMergeStrategy.Append:
value = GetAttribute(name) + value;
RemoveAttribute(name);
break;
case AttributeMergeStrategy.Skip:
return(true);
default:
var keyIndex = 2;
while (ContainsKey(name + "_" + keyIndex))
{
keyIndex++;
}
name = name + "_" + keyIndex;
break;
}
}
Add(name, value);
return(true);
}
public bool CanSetAttribute(string name, string value, AttributeMergeStrategy mergeStrategy = AttributeMergeStrategy.Rename)
{
var alreadyContainsKey = ContainsKey(name);
var valueIsNotIdentical = GetAttributeOrEmpty(name) != value;
var doesNotHaveStyle = !ContainsKey("style");
if (name == "Text")
{
mergeStrategy = AttributeMergeStrategy.Append;
}
var canSetAttribute = !(alreadyContainsKey &&
mergeStrategy == AttributeMergeStrategy.Merge &&
valueIsNotIdentical &&
doesNotHaveStyle);
return(canSetAttribute);
}
