cleanup CSS a bit

src/component/app/App.css

@@ -40,6 +40,11 @@ footer {
   color: white;
 }
 
+footer ::selection {
+  color: dodgerblue;
+  background: lightblue;
+}
+
 footer a {
   color: white;
 }

src/component/app/App.tsx

@@ -142,11 +142,35 @@ export function App() {
   // dynamic evalutions
   const evalResult = evalExpr(currentState, extendedEnv);
 
+  const onCopy = () => {
+    const serialized = JSON.stringify(currentState);
+    navigator.clipboard.write([new ClipboardItem({"text/plain": serialized})]);
+  }
+  const onPaste = () => {
+    navigator.clipboard.read().then(items => {
+      if (items.length === 1) {
+        items[0].getType("text/plain")
+        .then(value => value.text())
+        .then(text => {
+          try {
+            const parsed = JSON.parse(text);
+            pushHistory(_ => parsed);
+          }
+          catch (e) {
+            console.error(e);
+          }
+        })
+      }
+    });
+  }
+
   return (
     <>
       <header>
         <button disabled={appState.history.length===1} onClick={onUndo}>Undo ({appState.history.length-1}) <kbd>Ctrl</kbd>+<kbd>Z</kbd></button>
         <button disabled={appState.future.length===0} onClick={onRedo}>Redo ({appState.future.length})  <kbd>Ctrl</kbd>+<kbd>Shift</kbd>+<kbd>Z</kbd></button>
+        <button onClick={onCopy}>Copy <kbd>Ctrl</kbd>+<kbd>C</kbd></button>
+        <button onClick={onPaste}>Paste <kbd>Ctrl</kbd>+<kbd>V</kbd></button>
         {
           actionShortcuts.map(([_, keys, descr], i) =>
             <span key={i} className={'command' + (highlighted[i] ? (' highlighted') : '')}>

src/component/expr/ExprBlock.css

@@ -3,13 +3,11 @@
   position: relative;
 }
 .editor.error {
-  border: 1px solid red;
+  border: 1px solid red !important;
   display: inline-block;
 }
 
 .errorMessage {
-  display: none;
-  position: absolute;
   color: darkred;
   background-color: pink;
   margin-top: 4px;
@@ -20,11 +18,6 @@
   width: max-content;
 }
 
-.editor:hover > .errorMessage {
-  display: block;
-  /* z-index: 9999; */
-}
-
 .editor.unknown {
   border: 1px dashed dodgerblue;
   display: inline-block;

src/component/expr/ExprBlock.tsx

@@ -51,13 +51,14 @@ export function ExprBlock(props: ExprBlockProps) {
   const actions = getActions(globalContext, props.setState);
   const extraHandlers = Object.fromEntries(Object.entries(actions).map(([shortcut, action]) =>
     [shortcut, (e) => { e.preventDefault(); action(); }]));
-  const err = props.typeInfo.err || evalExpr(props.state, env).err;
-  return <span className={"editor" + (err ? " error" : "")}>
+  const evalResult = evalExpr(props.state, env);
+  const err = props.typeInfo.err || evalResult.err;
+  return <span className={"editor" + (err ? " error" : "") + ((evalResult.val === undefined) ? " unknown" : "")}>
     {renderBlock[props.state.kind]()}
-    {(err !== undefined) &&
+    {/* {(err !== undefined) &&
       (<div className="errorMessage">
         {err.message.trim()}
-      </div>)}
+      </div>)} */}
     <Input
       placeholder="<c>"
       text=""

src/component/expr/InputBlock.css

@@ -1,32 +1,7 @@
-.inputBlock {
-  position: relative;
-}
-.editable {
-  position: relative;
-  border: 0;
-  font-size: 10pt;
-  font-family: var(--my-monospace-font);
-  background-color: transparent;
-  color: inherit;
-  padding: 0;
-  cursor: text;
-  outline: 0;
-}
-.suggest {
-  top: 2.4px;
-  position: absolute;
-  color: #aaa;
-}
-.suggestionsPlaceholder {
-  display: inline-block;
-  position: relative;
-  vertical-align: bottom;
-}
-.suggestions {
+.suggestionsScrollableBox {
   display: block;
   color: black;
   text-align: left;
-  position: absolute;
   border: solid 1px dodgerblue;
   cursor: pointer;
   max-height: calc(100vh - 64px);

src/component/expr/InputBlock.tsx

@@ -12,6 +12,7 @@ import { Type as TypeBlock, TypeInfoBlock } from "../other/Type";
 import type { ExprBlockState, State2Props } from "./ExprBlock";
 
 import "./InputBlock.css";
+import { evalExpr } from "../../eval/eval";
 
 interface Literal {
   kind: "literal";
@@ -95,7 +96,6 @@ export function InputBlock({ state, setState, score, onCancel, typeInfo }: Input
   const singleSuggestion = trie.growPrefix(env.names)(text);
   const suggestions = useMemo(() => computeSuggestions(text, env, score), [text, score, env]);
 
-
   useEffect(() => {
     if (focus) {
       inputRef.current?.focus();
@@ -145,7 +145,10 @@ export function InputBlock({ state, setState, score, onCancel, typeInfo }: Input
     },
   };
 
-  return <><Input
+  const err = typeInfo.err || evalExpr(state, env).err;
+
+  return <>
+    <Input
       placeholder="<name or literal>"
       onCancel={onCancel}
       onEnter={onSelectSuggestion}
@@ -154,20 +157,26 @@ export function InputBlock({ state, setState, score, onCancel, typeInfo }: Input
       suggestion={singleSuggestion}
       extraHandlers={extraHandlers}
       >
-      <span className="suggestionsPlaceholder">
+      <span className="dropdownContainer">
+        <span className="dropdown">
+          {(err !== undefined) &&
+            (<div className="errorMessage">
+              {err.message.trim()}
+            </div>)}
           <Suggestions
             suggestions={suggestions}
             onSelect={onSelectSuggestion}
             i={i} setI={setI} />
         </span>
+      </span>
     </Input>
     ::<TypeInfoBlock typeInfo={typeInfo} />
-    </>
+  </>;
 }
 
 function Suggestions({ suggestions, onSelect, i, setI }) {
   return <>{(suggestions.length > 0) &&
-    <div className={"suggestions"}>
+    <div className={"suggestionsScrollableBox"}>
       {suggestions.map((suggestion, j) =>
         <SuggestionMemo key={j}
           {...{setI, j,

src/component/other/Input.css

@@ -0,0 +1,19 @@
+.textboxContainer {
+  position: relative;
+}
+.textbox {
+  position: relative;
+  border: 0;
+  font-size: 10pt;
+  font-family: var(--my-monospace-font);
+  background-color: transparent;
+  color: inherit;
+  padding: 0;
+  cursor: text;
+  outline: 0;
+}
+.textbox.hint {
+  top: 2.4px;
+  position: absolute;
+  color: #aaa;
+}

src/component/other/Input.tsx

@@ -1,5 +1,7 @@
 import { useEffect, useRef, type ReactNode, type KeyboardEvent, useState } from "react";
 
+import "./Input.css";
+
 interface InputProps {
   placeholder: string;
   text: string;
@@ -128,12 +130,11 @@ export function Input({placeholder, text, suggestion, onTextChange, onEnter, onC
     }
   };
 
-  return <span className="inputBlock">
-    {(focus === "yes") && children}
-    <span className="editable suggest">{text}{focus && suggestion}</span>
+  return <span className="textboxContainer">
+    <span className="textbox hint">{text}{focus && suggestion}</span>
     <input ref={ref}
       placeholder={placeholder}
-      className="editable"
+      className="textbox"
       value={text}
       onInput={(e) =>
         // @ts-ignore
@@ -143,5 +144,6 @@ export function Input({placeholder, text, suggestion, onTextChange, onEnter, onC
       onBlur={() => setFocus("no")}
       spellCheck={false}
       />
+    {(focus === "yes") && children}
     </span>;
 }

src/component/other/Type.css

@@ -6,13 +6,11 @@
 .type {
   margin:1px;
   display: inline-block;
-
   font-family: "Roboto", sans-serif;
   font-optical-sizing: auto;
   font-weight: 400;
   font-style: normal;
   font-variation-settings: "wdth" 100;
-
   color: darkgrey;
 }
 
@@ -60,7 +58,7 @@
 
 .iteratorType {
   border-style: dashed;
-  /* animation: flickerAnimation 500ms steps(1) normal infinite; */
+  animation: flickerAnimation 500ms steps(1) normal infinite;
 }
 
 /* Animations */
@@ -74,25 +72,13 @@
 
 .typeSignature {
   display: inline-block;
-  position: relative;
 }
-
 .typeDebug {
-  display: none;
-}
-
-.typeSignature:hover > .typeDebug {
-  display: inline-block;
-  position: absolute;
   white-space-collapse: preserve;
   width: max-content;
   background-color: #d2ebf1e0;
   color: black;
   font-family: var(--my-monospace-font);
   padding: 4px;
-  z-index: 100;
-}
-
-.editor:hover > .typeSignature {
-  display: inline-block;
+  font-size: 10pt;
 }

src/component/other/Type.tsx

@@ -5,10 +5,9 @@ import { ValueUnknown } from "./Value";
 import type { TypeInfo } from "../../eval/infer_type";
 
 export function TypeInfoBlock({typeInfo}: {typeInfo: TypeInfo}) {
-  return <span className="typeSignature gotDebug">
+  return <span className="typeSignature mouseOver dropdownContainer">
     <Type type={typeInfo.type}/>
-    <br/>
-    <span className="typeDebug">{prettySS(typeInfo.subs)}</span>
+    <span className="typeDebug hideIfMouseAway dropdown">{prettySS(typeInfo.subs)}</span>
   </span>;
 }
 

src/index.css

@@ -17,3 +17,24 @@ kbd {
   border-radius: 3px;
   margin: 0 2px 0 2px;
 }
+
+
+.dropdownContainer {
+  position: relative;
+}
+.dropdown {
+  position: absolute;
+  display: block;
+  z-index: 100;
+}
+.hideIfMouseAway {
+  display: none;
+}
+.mouseOver:hover .dropdown {
+  display: block;
+}
+
+::selection {
+  color: white;
+  background: dodgerblue;
+}