From 949c9df0a0bf6aa5c56e5045eff040927f3757be Mon Sep 17 00:00:00 2001
From: Shadow Cat <shadowcatzero@protonmail.com>
Date: Sat, 20 Sep 2025 12:49:55 -0400
Subject: [PATCH] cache text buf

---
 src/core/text.rs   | 21 ++++++++++++---------
 src/util/change.rs | 30 ++++++++++++++++++++++++++++++
 src/util/mod.rs    |  2 ++
 3 files changed, 44 insertions(+), 9 deletions(-)
 create mode 100644 src/util/change.rs

diff --git a/src/core/text.rs b/src/core/text.rs
index 4437f53..ba1bb69 100644
--- a/src/core/text.rs
+++ b/src/core/text.rs
@@ -1,9 +1,9 @@
 use cosmic_text::{Attrs, Family, FontSystem, Metrics, Shaping};
 
-use crate::prelude::*;
+use crate::{prelude::*, util::MutDetect};
 
 pub struct Text {
-    pub content: String,
+    pub content: MutDetect<String>,
     pub attrs: TextAttrs,
     /// inner alignment of text region (within where its drawn)
     pub align: Align,
@@ -32,7 +32,7 @@ impl Text {
     pub fn new(content: impl Into<String>) -> Self {
         let attrs = TextAttrs::default();
         Self {
-            content: content.into(),
+            content: content.into().into(),
             buf: TextBuffer::new_empty(Metrics::new(attrs.font_size, attrs.line_height)),
             attrs,
             align: Align::Center,
@@ -49,12 +49,15 @@ impl Text {
             font_system,
             Metrics::new(self.attrs.font_size, self.attrs.line_height),
         );
-        self.buf.set_text(
-            font_system,
-            &self.content,
-            &Attrs::new().family(self.attrs.family),
-            Shaping::Advanced,
-        );
+        if self.content.changed {
+            self.content.changed = false;
+            self.buf.set_text(
+                font_system,
+                &self.content,
+                &Attrs::new().family(self.attrs.family),
+                Shaping::Advanced,
+            );
+        }
     }
 }
 
diff --git a/src/util/change.rs b/src/util/change.rs
new file mode 100644
index 0000000..f1a01bd
--- /dev/null
+++ b/src/util/change.rs
@@ -0,0 +1,30 @@
+use std::ops::{Deref, DerefMut};
+
+pub struct MutDetect<T> {
+    inner: T,
+    pub changed: bool,
+}
+
+impl<T> Deref for MutDetect<T> {
+    type Target = T;
+
+    fn deref(&self) -> &Self::Target {
+        &self.inner
+    }
+}
+
+impl<T> DerefMut for MutDetect<T> {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        self.changed = true;
+        &mut self.inner
+    }
+}
+
+impl<T> From<T> for MutDetect<T> {
+    fn from(inner: T) -> Self {
+        MutDetect {
+            inner,
+            changed: true,
+        }
+    }
+}
diff --git a/src/util/mod.rs b/src/util/mod.rs
index f465f42..411a294 100644
--- a/src/util/mod.rs
+++ b/src/util/mod.rs
@@ -1,9 +1,11 @@
 mod borrow;
+mod change;
 mod id;
 mod math;
 mod refcount;
 
 pub(crate) use borrow::*;
+pub use change::*;
 pub(crate) use id::*;
 pub(crate) use math::*;
 pub(crate) use refcount::*;