From 42d2e94fe66fdebed5fbebea66813b3e62d10ec4 Mon Sep 17 00:00:00 2001
From: filifa <filifa.breath652@8alias.com>
Date: Thu, 11 Dec 2025 23:49:34 -0500
Subject: [PATCH] try disabling buttons when modulus is focused

---
 main.js | 57 ++++++++++++++++++++++++++++++++-------------------------
 1 file changed, 32 insertions(+), 25 deletions(-)

diff --git a/main.js b/main.js
index f4fc4a9..b1e1adc 100644
--- a/main.js
+++ b/main.js
@@ -31,55 +31,52 @@ function evaluate() {
 	}
 }
 
-let currentInput = document.querySelector("#expr");
+const expr = document.querySelector("#expr");
 let selectionStart = 0;
 let selectionEnd = 0;
 
-function setCurrentInput() {
-	currentInput = this;
-	selectionStart = this.selectionStart;
-	selectionEnd = this.selectionEnd;
+function setupExprInput() {
+	selectionStart = expr.selectionStart;
+	selectionEnd = expr.selectionEnd;
+	switchButtons(true);
 }
 
 function clear() {
-	currentInput.value = "";
-	currentInput.focus();
+	expr.value = "";
+	expr.focus();
 }
 
 function keyPress(c) {
-	// FIXME not working with modulus
-	// errors in logs on each key press
-	// wonder if it's an issue with it being a number type
-	currentInput.focus();
-	const begin = currentInput.value.slice(0, selectionStart);
-	const end = currentInput.value.slice(selectionEnd);
-	currentInput.value = begin + c + end;
-	currentInput.setSelectionRange(selectionStart+c.length, selectionStart+c.length);
+	expr.focus();
+	const begin = expr.value.slice(0, selectionStart);
+	const end = expr.value.slice(selectionEnd);
+	expr.value = begin + c + end;
+	expr.setSelectionRange(selectionStart+c.length, selectionStart+c.length);
 }
 
 function backspace() {
-	currentInput.focus();
+	expr.focus();
 	if (selectionEnd === 0) {
 		return;
 	}
 
 	let begin = null;
 	if (selectionStart === selectionEnd) {
-		begin = currentInput.value.slice(0, selectionStart-1);
+		begin = expr.value.slice(0, selectionStart-1);
 	} else {
-		begin = currentInput.value.slice(0, selectionStart);
+		begin = expr.value.slice(0, selectionStart);
 	}
 
-	const end = currentInput.value.slice(selectionEnd);
+	const end = expr.value.slice(selectionEnd);
 
-	currentInput.value = begin + end;
+	expr.value = begin + end;
 
 	if (selectionStart === 0) {
-		currentInput.setSelectionRange(0, 0);
+		expr.setSelectionRange(0, 0);
 	} else if (selectionStart === selectionEnd) {
-		currentInput.setSelectionRange(selectionStart-1, selectionStart-1);
+		expr.setSelectionRange(selectionStart-1, selectionStart-1);
 	} else {
-		currentInput.setSelectionRange(selectionStart, selectionStart);
+		expr.setSelectionRange(selectionStart, selectionStart);
 	}
 }
 
@@ -89,10 +86,20 @@ function evalOnEnter(e) {
 	}
 }
 
-document.querySelector("#expr").addEventListener("focus", setCurrentInput);
+function switchButtons(enabled) {
+	for (const btn of document.querySelectorAll("#main-buttons button")) {
+		btn.disabled = !enabled;
+	}
+
+	for (const btn of document.querySelectorAll("#extra-buttons button")) {
+		btn.disabled = !enabled;
+	}
+}
+
+document.querySelector("#expr").addEventListener("focus", setupExprInput);
 document.querySelector("#expr").addEventListener("keyup", (e) => evalOnEnter(e));
 
-document.querySelector("#modulus").addEventListener("focus", setCurrentInput);
+document.querySelector("#modulus").addEventListener("focus", () => switchButtons(false));
 document.querySelector("#modulus").addEventListener("keyup", (e) => evalOnEnter(e));
 
 document.querySelector("#zero").addEventListener("click", () => keyPress("0"));