From 8387e67fd66662111b716998b6795f995e02f807 Mon Sep 17 00:00:00 2001
From: Andrew Bastin <andrewbastin.k@gmail.com>
Date: Tue, 7 Nov 2023 13:12:19 +0530
Subject: [PATCH] feat: dynamically change mac window theme based on hopp theme

---
 .../src-tauri/Cargo.toml                      | 18 +++++-
 .../src-tauri/src/mac/window.rs               | 55 +++++++++++++++++--
 2 files changed, 65 insertions(+), 8 deletions(-)

diff --git a/packages/hoppscotch-selfhost-desktop/src-tauri/Cargo.toml b/packages/hoppscotch-selfhost-desktop/src-tauri/Cargo.toml
index 7de7030bf..12a43c3fc 100644
--- a/packages/hoppscotch-selfhost-desktop/src-tauri/Cargo.toml
+++ b/packages/hoppscotch-selfhost-desktop/src-tauri/Cargo.toml
@@ -13,21 +13,33 @@ edition = "2021"
 tauri-build = { version = "1.4.0", features = [] }
 
 [dependencies]
-tauri = { version = "1.4.1", features = [ "dialog-save", "fs-write-file", "http-all", "os-all", "shell-open", "window-start-dragging", "http-multipart"] }
+tauri = { version = "1.4.1", features = [
+  "dialog-save",
+  "fs-write-file",
+  "http-all",
+  "os-all",
+  "shell-open",
+  "window-start-dragging",
+  "http-multipart",
+] }
 tauri-plugin-store = { git = "https://github.com/tauri-apps/plugins-workspace", branch = "v1" }
 tauri-plugin-deep-link = { git = "https://github.com/FabianLars/tauri-plugin-deep-link", branch = "main" }
 tauri-plugin-window-state = "0.1.0"
 reqwest = "0.11.20"
 serde_json = "1.0.107"
 url = "2.4.1"
+hex_color = "2.0.0"
 
 [target.'cfg(target_os = "macos")'.dependencies]
 cocoa = "0.25.0"
 objc = "0.2.7"
 
 [target.'cfg(target_os = "windows")'.dependencies]
-windows = { version = "0.51.1", features = ["Win32_Graphics_Dwm", "Win32_Foundation", "Win32_UI_Controls"] }
-hex_color = "2.0.0"
+windows = { version = "0.51.1", features = [
+  "Win32_Graphics_Dwm",
+  "Win32_Foundation",
+  "Win32_UI_Controls",
+] }
 
 [features]
 # this feature is used for production builds or when `devPath` points to the filesystem
diff --git a/packages/hoppscotch-selfhost-desktop/src-tauri/src/mac/window.rs b/packages/hoppscotch-selfhost-desktop/src-tauri/src/mac/window.rs
index e4c2ec854..1330bfba5 100644
--- a/packages/hoppscotch-selfhost-desktop/src-tauri/src/mac/window.rs
+++ b/packages/hoppscotch-selfhost-desktop/src-tauri/src/mac/window.rs
@@ -1,3 +1,4 @@
+use hex_color::HexColor;
 use tauri::{App, Manager, Runtime, Window};
 
 // If anything breaks on macOS, this should be the place which is broken
@@ -31,18 +32,48 @@ unsafe fn set_transparent_titlebar(id: cocoa::base::id) {
     id.setTitleVisibility_(cocoa::appkit::NSWindowTitleVisibility::NSWindowTitleHidden);
 }
 
+struct UnsafeWindowHandle(*mut std::ffi::c_void);
+unsafe impl Send for UnsafeWindowHandle {}
+unsafe impl Sync for UnsafeWindowHandle {}
+
+#[cfg(target_os = "macos")]
+fn update_window_theme(window: &tauri::Window, color: HexColor) {
+    use cocoa::appkit::{
+        NSAppearance, NSAppearanceNameVibrantDark, NSAppearanceNameVibrantLight, NSWindow,
+    };
+
+    let brightness = (color.r as u64 + color.g as u64 + color.b as u64) / 3;
+
+    unsafe {
+        let window_handle = UnsafeWindowHandle(window.ns_window().unwrap());
+
+        let _ = window.run_on_main_thread(move || {
+            let handle = window_handle;
+
+            let selected_appearance = if brightness >= 128 {
+                NSAppearance(NSAppearanceNameVibrantLight)
+            } else {
+                NSAppearance(NSAppearanceNameVibrantDark)
+            };
+
+            NSWindow::setAppearance(handle.0 as cocoa::base::id, selected_appearance);
+            set_window_controls_pos(
+                handle.0 as cocoa::base::id,
+                WINDOW_CONTROL_PAD_X,
+                WINDOW_CONTROL_PAD_Y,
+            );
+        });
+    }
+}
+
 #[cfg(target_os = "macos")]
 fn set_window_controls_pos(window: cocoa::base::id, x: f64, y: f64) {
     use cocoa::{
-        appkit::{NSAppearance, NSAppearanceNameVibrantLight, NSView, NSWindow, NSWindowButton},
+        appkit::{NSView, NSWindow, NSWindowButton},
         foundation::NSRect,
     };
 
     unsafe {
-        // Set appearance windows to be light for better visibility when on light theme
-        // TODO: Detect when on dark theme and set to dark and on light switch to light
-        NSWindow::setAppearance(window, NSAppearance(NSAppearanceNameVibrantLight));
-
         let close = window.standardWindowButton_(NSWindowButton::NSWindowCloseButton);
         let miniaturize = window.standardWindowButton_(NSWindowButton::NSWindowMiniaturizeButton);
         let zoom = window.standardWindowButton_(NSWindowButton::NSWindowZoomButton);
@@ -342,4 +373,18 @@ pub fn setup_mac_window(app: &mut App) {
     }
 
     app.get_window("main").unwrap().set_transparent_titlebar();
+
+    let window_handle = app.get_window("main").unwrap();
+    update_window_theme(&window_handle, HexColor::WHITE);
+
+    // Control window theme based on app update_window
+    app.listen_global("hopp-bg-changed", move |ev| {
+        let payload = serde_json::from_str::<&str>(ev.payload().unwrap())
+            .unwrap()
+            .trim();
+
+        let color = HexColor::parse_rgb(payload).unwrap();
+
+        update_window_theme(&window_handle, color);
+    });
 }