a bit more progress

src/CallBlock.css

@@ -5,7 +5,7 @@
 }
 
 .functionName {
-  text-align: center;
+  /* text-align: center; */
 
 }
 
@@ -20,7 +20,7 @@
 }
 
 .inputParam {
-  height: 20px;
+  /* height: 20px; */
   margin-right: 20px;
   display: inline-block;
   background-color: rgba(242, 253, 146);

src/CallBlock.tsx

@@ -22,7 +22,7 @@ interface CallBlockProps extends State2Props<CallBlockState> {
 }
 
 export function CallBlock({ state: {kind, env, fn, input, resolved, rollback }, setState, onResolve }: CallBlockProps) {
-  const setResolved = (resolved: Dynamic) => {
+  const setResolved = (resolved?: Dynamic) => {
     setState({kind, env, fn, input, resolved, rollback});
   }
 
@@ -53,7 +53,11 @@ export function CallBlock({ state: {kind, env, fn, input, resolved, rollback },
       makeTheCall(input, fnState);
     }
     else {
-      setFn(fnState);
+      // setFn(fnState);
+      setResolved(undefined);
+      onResolve({
+        kind, env, fn: fnState, input, resolved: undefined, rollback
+      });
     }
   }
   const onInputResolve = (inputState) => {

src/Editor.tsx

@@ -7,7 +7,7 @@ import { useEffect, useState } from "react";
 import { Type } from "./Type";
 
 import "./Editor.css"
-import { focusNextElement } from "./util/dom_trickery";
+import { focusNextElement, focusPrevElement } from "./util/dom_trickery";
 
 interface LetInBlockState {
   kind: "let";
@@ -49,22 +49,43 @@ interface EditorProps extends State2Props<EditorState> {
 
 const dontFilter = () => true;
 
+function getCommands(type) {
+  const commands = ['u', 't', 'Enter', 'Backspace', 'ArrowLeft', 'Tab'];
+  if (getSymbol(type) === symbolFunction) {
+    commands.push('c');
+  }
+  return commands;
+}
+
 export function Editor({state, setState, onResolve, onCancel}: EditorProps) {
-  const [proxyState, setProxyState] = useState<'unresolved'|'command'|'resolved'>('unresolved');
+  const [needCommand, setNeedCommand] = useState(false);
   const onMyResolve = (editorState: EditorState) => {
     setState(editorState);
     if (editorState.resolved) {
-      setProxyState('command');
+      setNeedCommand(true);
     }
     else {
-      setProxyState('unresolved');
+      // unresolved
+      setNeedCommand(false);
+      onResolve(editorState); // pass up the fact that we're unresolved
     }
   }
   // const onMyCancel
   const onCommand = (e: React.KeyboardEvent) => {
     const type = getType(state.resolved);
-    if (e.key === "c" && getSymbol(type) === symbolFunction) {
-      e.preventDefault();
+    const commands = getCommands(type);
+    if (!commands.includes(e.key)) {
+      return;
+    }
+    e.preventDefault();
+    setNeedCommand(false);
+    // u -> pass Up
+    if (e.key === "u" || e.key === "Enter" || e.key === "Tab") {
+      onResolve(state);
+      return;
+    }
+    // c -> Call
+    if (e.key === "c") {
       // we become CallBlock
       setState({
         kind: "call",
@@ -74,11 +95,24 @@ export function Editor({state, setState, onResolve, onCancel}: EditorProps) {
         resolved: undefined,
         rollback: state,
       });
-      setProxyState('resolved');
+      return;
     }
-    if (e.key === "u" || e.key === "Enter") {
-      setProxyState('resolved');
-      onResolve(state);
+    // t -> Transform
+    if (e.key === "t") {
+      // we become CallBlock
+      setState({
+        kind: "call",
+        env: state.env,
+        fn: initialEditorState,
+        input: state,
+        resolved: undefined,
+        rollback: state,
+      });
+      return;
+    }
+    if (e.key === "Backspace" || e.key === "ArrowLeft") {
+      focusPrevElement();
+      return;
     }
   };
 
@@ -100,7 +134,7 @@ export function Editor({state, setState, onResolve, onCancel}: EditorProps) {
       (state.resolved)
       ? <div className="typeSignature">
           :: <Type type={getType(state.resolved)} />
-          { (proxyState === 'command')
+          { (needCommand)
             ? <input autoFocus={true} className="editable command" placeholder="<enter command>" onKeyDown={onCommand} value=""/>
             : <></>
           }

src/InputBlock.css

@@ -14,7 +14,11 @@
   font-variation-settings: "wdth" 100;
 
 }
-.suggestions { 
+.suggestions {
+  display: none;
+}
+.suggestions {
+  display: block;
   text-align: left;
   position: absolute;
   border: solid 1px dodgerblue;

src/InputBlock.tsx

@@ -8,6 +8,7 @@ import { Type } from "./Type";
 import "./InputBlock.css";
 import type { Dynamic, State2Props } from "./util/extra";
 import type { EditorState } from "./Editor";
+import { ShowIf } from "./ShowIf";
 
 export interface InputBlockState {
   kind: "input";
@@ -27,9 +28,6 @@ export function InputBlock({ state: {kind, env, text, resolved, rollback}, setSt
   const ref = useRef<any>(null);
   useEffect(() => {
     ref.current?.focus();
-    if (ref.current) {
-      // ref.current.textContent = text;
-    }
   }, []);
 
   const [i, setI] = useState(0); // selected suggestion
@@ -111,6 +109,10 @@ export function InputBlock({ state: {kind, env, text, resolved, rollback}, setSt
             setRightMostCaretPosition(ref.current);
             e.preventDefault();  
           }
+          else {
+            onSelectSuggestion(suggestions[i]);
+            e.preventDefault();
+          }
         }
       },
       ArrowDown: () => {
@@ -149,21 +151,38 @@ export function InputBlock({ state: {kind, env, text, resolved, rollback}, setSt
 
   return <span>
     <span className="">
-      <input ref={ref} placeholder="start typing..." autoFocus={true} className="editable" value={text} onInput={onInput} onKeyDown={onKeyDown} onFocus={() => setHaveFocus(true)} onBlur={() => setHaveFocus(false)}/>
+      <input ref={ref} placeholder="start typing..." className="editable" value={text} onInput={onInput} onKeyDown={onKeyDown} onFocus={() => setHaveFocus(true)} onBlur={() => setTimeout(() => setHaveFocus(false), 200)}/>
       <span className="text-block suggest">{singleSuggestion}</span>
       </span>
-      {
-        (haveFocus)
-        ? <Suggestions suggestions={suggestions} onSelect={onSelectSuggestion} i={i} setI={setI} />
-        : <></>
-      }
+      <ShowIf cond={haveFocus}>
+        <Suggestions
+          suggestions={suggestions}
+          onSelect={onSelectSuggestion}
+          i={i} setI={setI} />
+      </ShowIf>
   </span>;
 }
 
 function Suggestions({ suggestions, onSelect, i, setI }) {
+  const onMouseEnter = j => () => {
+    setI(j);
+  };
+  const onMouseDown = j => () => {
+    setI(j);
+    onSelect(suggestions[i]);
+  };
+
   return (suggestions.length > 0) ?
-    <div className="suggestions">
-      {suggestions.map(([name, dynamic], j) => <div key={`${j}_${name}`} className={i === j ? "selected" : ""} onClick={() => onSelect(suggestions[i])}>{name} :: <Type type={getType(dynamic)} /></div>)}
+    <div className={"suggestions"}>
+      {suggestions.map(([name, dynamic], j) =>
+        <div
+          key={`${j}_${name}`}
+          className={i === j ? "selected" : ""}
+          onMouseEnter={onMouseEnter(j)}
+          onMouseDown={onMouseDown(j)}>
+            {name} :: <Type type={getType(dynamic)} />
+        </div>)
+      }
     </div>
     : <></>;
 }

src/ShowIf.tsx

@@ -0,0 +1,9 @@
+// syntactic sugar
+export function ShowIf({cond, children}) {
+  if (cond) {
+    return <>{children}</>;
+  }
+  else {
+    return <></>;
+  }
+}

src/Value.tsx

@@ -1,4 +1,4 @@
-import {getType, getInst, getSymbol, Double, Int, symbolFunction, symbolProduct, symbolSum, symbolDict, symbolSet, symbolList, eqType, match} from "dope2";
+import {getType, getInst, getSymbol, Double, Int, symbolFunction, symbolProduct, symbolSum, symbolDict, symbolSet, symbolList, eqType, match, getLeft, getRight} from "dope2";
 
 import "./Value.css";
 
@@ -20,6 +20,9 @@ export function Value({dynamic}) {
     //   return <BinaryType type={type} cssClass="productType" infix="&#10799;" prefix="" suffix=""/>;
     case symbolSum:
       return <ValueSum val={inst} leftType={type.params[0](type)} rightType={type.params[1](type)}/>;
+      case symbolProduct:
+        return <ValueProduct val={inst} leftType={type.params[0](type)} rightType={type.params[1](type)}/>;
+  
     // case symbolDict:
     //   return <BinaryType type={type} cssClass="dictType" infix="&rArr;" prefix="{" suffix="}"/>;
     // case symbolSet:
@@ -51,4 +54,7 @@ function ValueSum({val, leftType, rightType}) {
   return match(val)
     (l => <>L <Value dynamic={{i:l, t:leftType}}/></>)
     (r => <>R <Value dynamic={{i:r, t:rightType}}/></>);
+}
+function ValueProduct({val, leftType, rightType}) {
+  return <>(<Value dynamic={{i:getLeft(val), t:leftType}}/>,&nbsp;<Value dynamic={{i:getRight(val), t:rightType}} />)</>;
 }

src/index.css

@@ -10,4 +10,9 @@ body {
   font-variation-settings:
     "wdth" 100;
 
+}
+
+:focus-within:not(body) {
+  /* outline: 2px solid black; */
+  /* background-color: aqua; */
 }