Trim text measurements only before `layout`

2 files changed, 9 insertions, 0 deletions

diff --git a/graphics/src/backend.rs b/graphics/src/backend.rs
index 77bb650b..59e95bf8 100644
--- a/graphics/src/backend.rs
+++ b/graphics/src/backend.rs
@@ -12,6 +12,13 @@ use std::borrow::Cow;
 pub trait Backend {
     /// The custom kind of primitives this [`Backend`] supports.
     type Primitive;
+
+    /// Trims the measurements cache.
+    ///
+    /// This method is currently necessary to properly trim the text cache in
+    /// `iced_wgpu` and `iced_glow` because of limitations in the text rendering
+    /// pipeline. It will be removed in the future.
+    fn trim_measurements(&mut self) {}
 }
 
 /// A graphics backend that supports text rendering.
diff --git a/graphics/src/renderer.rs b/graphics/src/renderer.rs
index 476aa407..c0cec60a 100644
--- a/graphics/src/renderer.rs
+++ b/graphics/src/renderer.rs
@@ -93,6 +93,8 @@ impl<B: Backend, T> iced_core::Renderer for Renderer<B, T> {
         element: &Element<'_, Message, Self>,
         limits: &layout::Limits,
     ) -> layout::Node {
+        self.backend.trim_measurements();
+
         element.as_widget().layout(self, limits)
     }