WindowOptions: Support none flag (#219)

* WindowOptions: add none flag

* windows: support none flag

Signed-off-by: rupansh <rupanshsekar@hotmail.com>

* os: implement none flags for other operating systems

redox, posix
not applicable on OSX

* WindowOptions: document none option

Signed-off-by: rupansh-arch <rupanshsekar@hotmail.com>

src/lib.rs

@@ -182,8 +182,13 @@ pub struct WindowOptions {
     pub topmost: bool,
     /// Specifies whether or not the window is allowed to draw transparent pixels (default: false)
     /// Requires borderless to be 'true'
-    /// TODO: Currently not implemented on Windows and OSX
+    /// TODO: Currently not implemented on OSX.
+    /// TODO: Make it work without none option on windows.
     pub transparency: bool,
+    /// Required for transparency on windows.
+    /// Should be mutually exclusive to resize, automatically assumes borderless.
+    /// Not supported on OSX.
+    pub none: bool,
 }
 
 impl Window {
@@ -1039,6 +1044,7 @@ impl Default for WindowOptions {
             scale: Scale::X1,
             scale_mode: ScaleMode::Stretch,
             topmost: false,
+            none: false,
         }
     }
 }

src/os/posix/wayland.rs

@@ -520,13 +520,13 @@ impl Window {
         let (display, input) = DisplayInfo::new(
             (width as i32 * scale, height as i32 * scale),
             opts.transparency,
-            !opts.borderless,
+            !opts.borderless || opts.none,
         )?;
 
         if opts.title {
             display.set_title(name);
         }
-        if !opts.resize {
+        if !opts.resize || opts.none {
             display.set_no_resize((width as i32 * scale, height as i32 * scale));
         }
 
@@ -558,7 +558,7 @@ impl Window {
             menu_counter: MenuHandle(0),
             menus: Vec::new(),
             input,
-            resizable: opts.resize,
+            resizable: opts.resize && !opts.none,
             buffer: Vec::with_capacity(width * height * scale as usize * scale as usize),
             toplevel_info: (resolution, closed),
             pointer_visibility: false,

src/os/posix/x11.rs

@@ -403,7 +403,7 @@ impl Window {
                     | xlib::FocusChangeMask,
             );
 
-            if !opts.resize {
+            if !opts.resize || opts.none {
                 let mut size_hints: xlib::XSizeHints = mem::zeroed();
 
                 size_hints.flags = xlib::PMinSize | xlib::PMaxSize;
@@ -419,7 +419,7 @@ impl Window {
                 );
             }
 
-            if opts.borderless {
+            if opts.borderless || opts.none {
                 let hints_property = (d.lib.XInternAtom)(
                     d.display,
                     "_MOTIF_WM_HINTS\0" as *const _ as *const c_char,

src/os/redox/mod.rs

@@ -61,7 +61,7 @@ impl Window {
         let window_height = height as u32 * window_scale as u32;
 
         let mut window_flags = vec![orbclient::WindowFlag::Async];
-        if opts.resize {
+        if opts.resize && !opts.none {
             window_flags.push(orbclient::WindowFlag::Resizable);
         }
         if !opts.title {

src/os/windows/mod.rs

@@ -541,6 +541,10 @@ impl Window {
                 flags &= winuser::WS_EX_LAYERED;
             }
 
+            if opts.none {
+                flags = winuser::WS_VISIBLE | winuser::WS_POPUP;
+            }
+
             let handle = winuser::CreateWindowExW(
                 0,
                 class_name.as_ptr(),