refactor a bit

src/actions.ts

@@ -0,0 +1,60 @@
+import { initialEditorState } from "./configurations";
+import { removeFocus } from "./eval";
+
+export const actionShortcuts: [string, string[], string][] = [
+  ["call"     , ['c'], "expr ⌴"             ],
+  ["transform", ['.'], "⌴ expr"             ],
+  ["assign"   , ['a'], "let (⌴ = expr) in ⌴"],
+  ["declare"  , ['d'], "let (⌴ = ⌴) in expr"],
+  ["lambda"   , ['l'], "λ⌴. expr"           ],
+];
+
+export function getActions(globalContext, setState) {
+  return {
+    c: () => {
+        setState(state => ({
+          kind: "call",
+          fn: removeFocus(state),
+          input: initialEditorState,
+        }));
+        globalContext?.doHighlight.call();    
+    },
+    '.': () => {
+        setState(state => ({
+          kind: "call",
+          fn: initialEditorState,
+          input: removeFocus(state),
+        }));
+        globalContext?.doHighlight.transform();
+    },
+    a: () => {
+        setState(state => ({
+          kind: "let",
+          name: "",
+          focus: true,
+          value: removeFocus(state),
+          inner: removeFocus(initialEditorState),
+        }));  
+        globalContext?.doHighlight.assign();    
+    },
+    d: () => {
+        setState(state => ({
+          kind: "let",
+          name: "",
+          focus: true,
+          value: removeFocus(initialEditorState),
+          inner: removeFocus(state),
+        }));
+        globalContext?.doHighlight.declare();
+    },
+    l: () => {
+      setState(state => ({
+        kind: "lambda",
+        paramName: "",
+        focus: true,
+        expr: removeFocus(state),
+      }));
+      globalContext?.doHighlight.lambda();
+    },
+  };
+}