feat: desktop app

Co-authored-by: Vivek R <123vivekr@gmail.com>
Co-authored-by: Liyas Thomas <liyascthomas@gmail.com>

packages/hoppscotch-selfhost-desktop/src-tauri/src/win/window.rs

@@ -0,0 +1,86 @@
+use hex_color::HexColor;
+use tauri::App;
+use tauri::Manager;
+
+use std::mem::transmute;
+use std::{ptr, ffi::c_void, mem::size_of};
+
+use windows::Win32::UI::Controls::{WTA_NONCLIENT, WTNCA_NODRAWICON, WTNCA_NOSYSMENU, WTNCA_NOMIRRORHELP};
+
+use windows::Win32::UI::Controls::SetWindowThemeAttribute;
+use windows::Win32::UI::Controls::WTNCA_NODRAWCAPTION;
+use windows::Win32::Graphics::Dwm::DWMWA_CAPTION_COLOR;
+use windows::Win32::Foundation::COLORREF;
+use windows::Win32::Foundation::BOOL;
+use windows::Win32::Graphics::Dwm::DwmSetWindowAttribute;
+use windows::Win32::Foundation::HWND;
+use windows::Win32::Graphics::Dwm::{DWMWA_USE_IMMERSIVE_DARK_MODE};
+
+fn hex_color_to_colorref(color: HexColor) -> COLORREF {
+  // TODO: Remove this unsafe, This operation doesn't need to be unsafe!
+  unsafe {
+    COLORREF(transmute::<[u8; 4], u32>([color.r, color.g, color.b, 0]))
+  }
+}
+
+struct WinThemeAttribute {
+  flag: u32,
+  mask: u32
+}
+
+#[cfg(target_os = "windows")]
+fn update_bg_color(hwnd: &HWND, bg_color: HexColor) {
+
+  let use_dark_mode = BOOL::from(true);
+
+  let final_color = hex_color_to_colorref(bg_color);
+
+  unsafe {
+    DwmSetWindowAttribute(
+      HWND(hwnd.0),
+      DWMWA_USE_IMMERSIVE_DARK_MODE,
+      ptr::addr_of!(use_dark_mode) as *const c_void,
+      size_of::<BOOL>().try_into().unwrap()
+    ).unwrap();
+
+    DwmSetWindowAttribute(
+      HWND(hwnd.0),
+      DWMWA_CAPTION_COLOR,
+      ptr::addr_of!(final_color) as *const c_void,
+      size_of::<COLORREF>().try_into().unwrap()
+    ).unwrap();
+
+    let flags = WTNCA_NODRAWCAPTION | WTNCA_NODRAWICON;
+    let mask  = WTNCA_NODRAWCAPTION | WTNCA_NODRAWICON | WTNCA_NOSYSMENU | WTNCA_NOMIRRORHELP;
+    let options = WinThemeAttribute { flag: flags, mask };
+
+    SetWindowThemeAttribute(
+      HWND(hwnd.0),
+      WTA_NONCLIENT,
+      ptr::addr_of!(options) as *const c_void,
+      size_of::<WinThemeAttribute>().try_into().unwrap()
+    ).unwrap();
+  }
+}
+
+#[cfg(target_os = "windows")]
+pub fn setup_win_window(app: &mut App) {
+
+  let window = app.get_window("main").unwrap();
+  let win_handle = window.hwnd().unwrap();
+
+  let win_clone = win_handle.clone();
+
+  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_bg_color(&HWND(win_clone.0), color);
+  });
+
+  update_bg_color(&HWND(win_handle.0), HexColor::rgb(23, 23, 23));
+}