added track field

src/karax.nim

@@ -135,6 +135,8 @@ proc equalsShallow(a, b: VNode): bool =
       if not equalsShallow(a[i], b[i]): return false
   if not sameAttrs(a, b): return false
   if a.class != b.class: return false
+  if a.track != 0 and b.track != 0:
+    if a.track != b.track: return false
   # XXX test event listeners here?
   return true
 
@@ -191,10 +193,10 @@ proc updateElement(parent, current: Node, newNode, oldNode: VNode) =
         var left = 0
         var rightNew = newLength - 1
         var rightOld = oldLength - 1
-      
+
         while left <= min(rightNew, rightOld):
           var minRight = min(rightOld, rightNew)
-          
+
           while left <= minRight and
               equalsTree(newNode[left], oldNode[left]):
             newNode[left] = oldNode[left]
@@ -205,7 +207,7 @@ proc updateElement(parent, current: Node, newNode, oldNode: VNode) =
             newNode[rightNew] = oldNode[rightOld]
             dec rightOld
             dec rightNew
-          
+
           minRight = min(rightOld, rightNew)
           if left <= minRight:
             updateElement(current, oldNode[left].dom, newNode[left], oldNode[left])
@@ -215,7 +217,7 @@ proc updateElement(parent, current: Node, newNode, oldNode: VNode) =
             updateElement(current, oldNode[rightOld].dom, newNode[rightNew], oldNode[rightOld])
             dec rightNew
             dec rightOld
-        
+
         var posNextElem = rightOld + 1
         var isPushBack = posNextElem == oldLength
         while left <= rightNew:

src/karaxdsl.nim

@@ -4,7 +4,7 @@ from strutils import startsWith, toLowerAscii
 
 const
   StmtContext = ["kout", "inc", "echo", "dec", "!"]
-  SpecialAttrs = ["id", "class", "value", "key"]
+  SpecialAttrs = ["id", "class", "value", "key", "track"]
 
 proc getName(n: NimNode): string =
   case n.kind

src/vdom.nim

@@ -109,6 +109,7 @@ type
     when false:
       hash*: Hash
       validHash*: bool
+    track*: int
     dom*: Node ## the attached real DOM node. Can be 'nil' if the virtual node
                ## is not part of the virtual DOM anymore.
 
@@ -143,6 +144,8 @@ proc eq*(a, b: VNode): bool =
   if a.attrs.len != b.attrs.len: return false
   for i in 0..<a.attrs.len:
     if a.attrs[i] != b.attrs[i]: return false
+  if a.track != 0 and b.track != 0:
+    if a.track != b.track: return false
   result = true
 
 proc setAttr*(n: VNode; key: cstring; val: cstring = "") =