Fix bug in notebook refresh.

We have much more state thatn

lib/sort.dx

@@ -12,7 +12,7 @@ it's doing bubble / insertion sort with quadratic time cost.
 However, if it breaks the list in half recursively, it'll be doing parallel mergesort.
 Currently the Dex compiler will do the quadratic-time version.
 
-def concat_table(leftin: a=>v, rightin: b=>v) -> (Either a b=>v) given (a|Ix, b|Ix, v) =
+def concat_table(leftin: a=>v, rightin: b=>v) -> (Either a b=>v) given (a|Ix, b|Ix, v:Type) =
   for idx. case idx of
     Left i  -> leftin[i]
     Right i -> rightin[i]
@@ -50,22 +50,16 @@ def merge_sorted_lists(lx: List a, ly: List a) -> List a given (a|Ord) =
   newsize = nx + ny
   AsList _ $ unsafe_cast_table(to=Fin newsize, sorted)
 
+# Warning: Has quadratic runtime cost for now.
 def sort(xs: n=>a) -> n=>a given (n|Ix, a|Ord) =
-  # Warning: Has quadratic runtime cost for now.
-
-  xlists = for i:n. (AsList 1 [xs[i]])
-
-  # Merge sort monoid:
-  mempty = AsList 0 []
-  mcombine = merge_sorted_lists
-
+  xlists = each xs \x. to_list([x])
   # reduce might someday recursively subdivide the problem.
-  AsList(_, r) = reduce mempty mcombine xlists
+  AsList(_, r) = reduce xlists mempty merge_sorted_lists
   unsafe_cast_table(to=n, r)
 
 def (+|)(i:n, delta:Nat) -> n  given (n|Ix) =
   i' = ordinal i + delta
   from_ordinal $ select (i' >= size n) (size n -| 1) i'
 
 def is_sorted(xs:n=>a) -> Bool given (a|Ord, n|Ix) =
-  all for i. xs[i] <= xs[i +| 1]
+  all for i:n. xs[i] <= xs[i +| 1]

static/index.ts

@@ -358,39 +358,19 @@ function render(renderMode:RenderMode, jsonData:string) {
           source.onmessage = function(event) {
               const msg = JSON.parse(event.data);
               if (msg == "start") {
-                  body.innerHTML = ""
-                  cells.clear()
-                  return
+                  resetState()
               } else {
                   processUpdates(msg)
               }};}
 }
-const katexOptions = {
-    delimiters: [
-        {left: "$$", right: "$$", display: true},
-        {left: "\\[", right: "\\]", display: true},
-        {left: "$", right: "$", display: false},
-        {left: "\\(", right: "\\)", display: false}
-    ],
-    // Enable commands that load resources or change HTML attributes
-    // (e.g. hyperlinks): https://katex.org/docs/security.html.
-    trust: true
-};
-
-function renderLaTeX(root:Div) {
-    // // Render LaTeX equations in prose blocks via KaTeX, if available.
-    // // Skip rendering if KaTeX is unavailable.
-    // let renderMathInElement: any
-    // if (typeof renderMathInElement == 'undefined') {
-    //     return;
-    // }
-    // // Render LaTeX equations in prose blocks via KaTeX.
-    // const proseBlocks = root.querySelectorAll(".prose-block");
-    // Array.from(proseBlocks).map((proseBlock) =>
-    //     renderMathInElement(proseBlock, katexOptions)
-    // );
+function resetState() {
+    body.innerHTML = ""
+    hoverInfoDiv.innerHTML = ""
+    minimap.innerHTML = ""
+    orderedCells.length = 0
+    curHighlights.length = 0
+    cells.clear()
 }
-
 // === hover system ===
 
 const curHighlights : [Div, string][] = []  // HTML elements currently highlighted

static/style.css

@@ -77,7 +77,8 @@ body {
 
 /* span highlighting */
 .highlight-error {
-  text-decoration: red wavy underline;
+  text-decoration: red underline;
+  text-decoration-thickness: 5px;
   text-decoration-skip-ink: none;}
 .highlight-group { background-color: yellow; }
 .highlight-scope { background-color: lightyellow; }