window size heuristic to keep dev tools from resizing window

crates/desktop/artcraft/src/state/main_window_size.rs

@@ -4,6 +4,7 @@ use serde_derive::{Deserialize, Serialize};
 use std::fs::OpenOptions;
 use std::io::Write;
 use tauri::{AppHandle, Manager, PhysicalSize, Window};
+use crate::utils::best_window_size_heuristic::best_window_size_heuristic;
 
 const MAIN_WINDOW_NAME: &str = "main";
 
@@ -26,7 +27,7 @@ impl MainWindowSize {
   }
 
   pub fn from_window(window: &Window) -> AnyhowResult<Self> {
-    let size = window.inner_size()?;
+    let size = best_window_size_heuristic(window)?;
     Ok(Self {
       width: size.width,
       height: size.height,

crates/desktop/artcraft/src/threads/main_window_thread/persist_window_resize_task.rs

@@ -1,5 +1,6 @@
 use crate::state::data_dir::app_data_root::AppDataRoot;
 use crate::state::main_window_size::MainWindowSize;
+use crate::utils::best_window_size_heuristic::best_window_size_heuristic;
 use errors::AnyhowResult;
 use log::info;
 use memory_store::clone_slot::CloneSlot;
@@ -12,7 +13,7 @@ pub async fn persist_window_resize_task(
 ) -> AnyhowResult<()> {
 
   let current_window_size = MainWindowSize::from_window(window)?;
-  let current_physical_size = window.inner_size()?;
+  let current_physical_size = best_window_size_heuristic(window)?;
 
   let mut save_size_to_disk = true;
   

crates/desktop/artcraft/src/utils/best_window_size_heuristic.rs

@@ -0,0 +1,25 @@
+use tauri::{PhysicalSize, Window};
+use errors::AnyhowResult;
+
+// A typical height difference when dev tools are open:
+//   Window inner size = PhysicalSize { width: 3704, height: 732 }
+//   Window outer size = PhysicalSize { width: 3704, height: 1476 }
+const HEIGHT_DIFFERENCE_THRESHOLD: u32 = 300;
+
+/// Get the best window size
+pub fn best_window_size_heuristic(window: &Window) -> AnyhowResult<PhysicalSize<u32>> {
+  // NB: Ordinarily we'd use inner size, as the outer size includes the window decorations.
+  // However, dev tools contract the inner size, and in the event they're open, we should 
+  // prefer the outer size.
+  let inner = window.inner_size()?;
+  let outer = window.outer_size()?;
+  
+  let height_delta = outer.height.saturating_sub(inner.height);
+  if height_delta > HEIGHT_DIFFERENCE_THRESHOLD {
+    // Dev tools are open, use the outer size
+    Ok(outer)
+  } else {
+    // Dev tools are not open, use the inner size
+    Ok(inner)
+  }
+}

crates/desktop/artcraft/src/utils/mod.rs

@@ -1,3 +1,4 @@
+pub mod best_window_size_heuristic;
 pub mod clear_all_webview_cookies;
 pub mod get_url_file_extension;
 pub mod image;