fix: 修复频繁调用LRU缓存导致的内存泄漏

Author: zty012

crates/project_graph/src/stage/structs.rs

@@ -19,8 +19,18 @@ pub struct Text {
     pub pos: KdlPos2,
     #[knus(child, unwrap(argument), default = String::new())]
     pub val: String,
-    pub position: Pos2,
-    pub content: String,
+
+    text_width: std::sync::OnceLock<f32>,
+}
+impl Text {
+    pub fn new(id: String, pos: Pos2, val: String) -> Self {
+        Text {
+            id,
+            pos: pos.into(),
+            val,
+            text_width: std::sync::OnceLock::new(),
+        }
+    }
 }
 impl EntityTrait for Text {
     fn id(&self) -> &str {

crates/project_graph/src/utils/text.rs

@@ -1,40 +1,8 @@
-use egui::{Context, FontId, Painter};
-use lru::LruCache;
-use std::num::NonZeroUsize;
-use std::sync::{LazyLock, Mutex};
-
-#[derive(Hash, PartialEq, Eq, Clone)]
-struct TextWidthCacheKey {
-    text: String,
-    /// 浮点数不能作为哈希键，所以需要转换为整数后存储
-    size: i32,
-}
-
-static TEXT_WIDTH_CACHE: LazyLock<Mutex<LruCache<TextWidthCacheKey, f32>>> = LazyLock::new(|| {
-    let cache = LruCache::new(NonZeroUsize::new(1024).unwrap());
-    Mutex::new(cache)
-});
+use egui::{FontId, Painter};
 
 /// 计算文字宽度
 pub fn get_text_width(text: &str, font_size: f32, painter: &Painter) -> f32 {
-    let key = TextWidthCacheKey {
-        text: text.to_string(),
-        size: (font_size * 10.0) as i32,
-    };
-
-    if let Ok(mut cache) = TEXT_WIDTH_CACHE.lock() {
-        if let Some(&width) = cache.get(&key) {
-            return width;
-        }
-    }
-
     let font_id = FontId::proportional(font_size);
     let galley = painter.layout_no_wrap(text.to_string(), font_id, egui::Color32::TRANSPARENT);
-    let width = galley.size().x;
-
-    if let Ok(mut cache) = TEXT_WIDTH_CACHE.lock() {
-        cache.put(key, width);
-    }
-
-    width
+    galley.size().x
 }