rewritten diff algorithm

tests/difftest.nim

@@ -0,0 +1,37 @@
+
+include "../src/karax"
+import "../src/karaxdsl"
+
+proc doDiff(a, b: VNode) =
+  var patches: seq[Patch] = @[]
+  echo diff(nil, vnodeToDom(a, kxi), b, a, patches, kxi)
+  echo patches
+
+proc testAppend() =
+  let a = buildHtml(tdiv):
+    ul:
+      li: text "A"
+      li: text "B"
+  let b = buildHtml(tdiv):
+    ul:
+      li: text "A"
+      li: text "B"
+      li: text "C"
+  doDiff(a, b)
+
+proc testInsert() =
+  let a = buildHtml(tdiv):
+    ul:
+      li: text "A"
+      li: text "C"
+  let b = buildHtml(tdiv):
+    ul:
+      li: text "A"
+      li: text "B"
+      li: text "C"
+  doDiff(a, b)
+
+kxi = KaraxInstance(rootId: cstring"ROOT", renderer: proc (): VNode = discard)
+
+#testAppend()
+testInsert()

tests/lists.nim

@@ -0,0 +1,18 @@
+import vdom, kdom, vstyles, karax, karaxdsl, jdict, jstrutils
+
+var contents: seq[cstring] = @[]
+
+proc onTodoEnter(e: Event; n: VNode) =
+  contents.insert(n.value & "BBBB")
+  contents.insert(n.value)
+  n.value = ""
+
+proc createDom(): VNode =
+  result = buildHtml(tdiv):
+    input(class = "new-todo", placeholder="What needs to be done?", name = "newTodo",
+          onkeyupenter = onTodoEnter, setFocus)
+    for c in contents:
+      tdiv:
+        text c
+
+setRenderer createDom