Commit cc021c98d7181a67b148b9ce001f9411260accd5 | snowbound

author	clover caruso <git@paperclover.net> 2026-09-29 04:24:02-07:00
committer	clover caruso <git@paperclover.net> 2026-09-29 04:24:02-07:00
log	cc021c98d7181a67b148b9ce001f9411260accd5
tree	184bd924f32ec7dc30c7c20e34890d90bfa62c16
parent	2d9ae5806189ab5ae2c042699773045856976c65
signature	Signed by SSH key SHA256:52mNGHRsVFBDED9IAX5pe+LRWUefqTbxEReunq21QvU

feat(snow-leopard): textured window with the toolbar in the title gradient

On 10.6 the window is textured with a top content border as tall as the
toolbar row, so AppKit's unified gradient runs through it. The GL backend
presents premultiplied sRGB for the transparent surface, empty toolbar space
drags the window through the 10.6 shim, and the bottom corners are cut at
10.6's radius.

Assisted-by: claude-opus-5.5

5 files changed, 43 insertions(+), 23 deletions(-)

crates
- snowbound
  - src
    aqua.rs
    linux.rs
    macos.rs
    main.rs
platform
- snow-leopard
  - rt
    appkit.c

crates/snowbound/src/aqua.rs+6-14

...	...	@@ -12,7 +12,7 @@ use objc2::{
12	12	sel,
13	13	};
14	14	use objc2_foundation::{MainThreadMarker, NSPoint, NSRect, NSSize};
15		use std::{cell::Cell, collections::HashMap};
	15	use std::collections::HashMap;
16	16	use ui::{Axis, PaintedScroller, Scroller, ScrollerPart};
17	17	use winit::{
18	18	raw_window_handle::{HasWindowHandle, RawWindowHandle},
...	...	@@ -57,19 +57,11 @@ pub fn textured(window: &Window, row: f32) -> bool {
57	57	true
58	58	}
59	59
60		thread_local! {
61		static DRAGS: Cell<bool> = const { Cell::new(false) };
62		}
63
64		/// Whether a press where the pointer is drags the window, which a textured window asks
65		/// its content of: presses on empty toolbar space do, and nowhere else.
66		pub fn set_window_drags(drags: bool) {
67		DRAGS.set(drags);
68		}
69
70		/// `-mouseDownCanMoveWindow` for the content view of a textured window.
71		pub extern "C" fn window_drags(_: &AnyObject, _: Sel) -> Bool {
72		Bool::new(DRAGS.get())
	60	/// `-mouseDownCanMoveWindow` for the content view: a textured window drags from any press
	61	/// on a view that allows it, asking once. The app drags from its toolbar's empty space
	62	/// itself, through `-performWindowDragWithEvent:`.
	63	pub extern "C" fn no_window_drags(_: &AnyObject, _: Sel) -> Bool {
	64	Bool::NO
73	65	}
74	66
75	67	/// The cursor for moving something: winit loads its move cursor from a folder of cursors

crates/snowbound/src/linux.rs-3

...	...	@@ -579,9 +579,6 @@ pub fn move_cursor() -> winit::window::CursorIcon {
579	579	winit::window::CursorIcon::Move
580	580	}
581	581
582		/// Window drags are the app's own.
583		pub fn set_window_drags(_: bool) {}
584
585	582	/// Scrollbars overlay the content.
586	583	pub fn scrollers() -> Option<ui::Scrollers> {
587	584	None

crates/snowbound/src/macos.rs+2-2

...	...	@@ -29,7 +29,7 @@ use winit::{
29	29	window::{Window, WindowAttributes},
30	30	};
31	31
32		pub use crate::aqua::{move_cursor, resize_grip, scrollers, set_window_drags};
	32	pub use crate::aqua::{move_cursor, resize_grip, scrollers};
33	33
34	34	static QUIT: OnceLock<EventLoopProxy<crate::UserEvent>> = OnceLock::new();
35	35	static INPUT_CLASS: OnceLock<&'static AnyClass> = OnceLock::new();
...	...	@@ -533,7 +533,7 @@ pub fn install_text_input(window: &Window) {
533	533	if crate::aqua::before_lion() {
534	534	class.add_method(
535	535	sel!(mouseDownCanMoveWindow),
536		crate::aqua::window_drags as extern "C" fn(_, _) -> _,
	536	crate::aqua::no_window_drags as extern "C" fn(_, _) -> _,
537	537	);
538	538	}
539	539	class.register()

crates/snowbound/src/main.rs-1

...	...	@@ -3072,7 +3072,6 @@ impl State {
3072	3072	fn input(&mut self, event: ui::Event) {
3073	3073	if let ui::Event::PointerMoved(point) = event {
3074	3074	self.pointer = point;
3075		platform::set_window_drags(self.ui.box_at(point) == Some(strip()));
3076	3075	if std::mem::take(&mut self.strip_held) {
3077	3076	let _ = self.window.drag_window();
3078	3077	}

platform/snow-leopard/rt/appkit.c+35-3

...	...	@@ -1,7 +1,8 @@
1	1	// AppKit that winit, AccessKit and the app call and 10.6 lacks, added at load time with
2	2	// the neutral answer: scale 1, no precise scrolling, no appearances, no tabbing, no full
3		// screen. `remote.sh selectors` lists what a binary names that 10.6 lacks. Linked from
4		// the archive by the appearance name winit imports, so only AppKit binaries carry it.
	3	// screen; window drags are done here. `remote.sh selectors` lists what a binary names
	4	// that 10.6 lacks. Linked from the archive by the appearance name winit imports, so only
	5	// AppKit binaries carry it.
5	6	// class_addMethod adds nothing where the system already has the method.
6	7	#include <ApplicationServices/ApplicationServices.h>
7	8	#include <objc/message.h>
...	...	@@ -53,6 +54,37 @@ static CGPoint point_from_screen(id self, SEL _cmd, CGPoint point) {
53	54	return CGPointMake(point.x - frame.origin.x, point.y - frame.origin.y);
54	55	}
55	56
	57	// 10.11: the window follows the pointer until the button comes up, as a press on its
	58	// title does.
	59	static void window_drag(id self, SEL _cmd, id event) {
	60	typedef CGPoint (*SendPoint)(id, SEL);
	61	typedef CGRect (*SendRect)(id, SEL);
	62	id event_class = (id)objc_getClass("NSEvent");
	63	CGPoint start = ((SendPoint)objc_msgSend)(event_class, sel_registerName("mouseLocation"));
	64	CGRect frame = ((SendRect)objc_msgSend_stret)(self, sel_registerName("frame"));
	65	id app = SEND(objc_getClass("NSApplication"), "sharedApplication");
	66	id forever = SEND(objc_getClass("NSDate"), "distantFuture");
	67	for (;;) {
	68	// NSLeftMouseDraggedMask \| NSLeftMouseUpMask.
	69	id next = ((id (*)(id, SEL, unsigned long long, id, CFStringRef, BOOL))objc_msgSend)(
	70	app, sel_registerName("nextEventMatchingMask:untilDate:inMode:dequeue:"),
	71	1 << 6 \| 1 << 2, forever, CFSTR("NSEventTrackingRunLoopMode"), YES);
	72	// NSLeftMouseUp.
	73	if (((unsigned long (*)(id, SEL))objc_msgSend)(next, sel_registerName("type")) == 2) {
	74	// The button's release stays in the queue for whoever asked for the drag.
	75	((void (*)(id, SEL, id, BOOL))objc_msgSend)(app, sel_registerName("postEvent:atStart:"), next, YES);
	76	return;
	77	}
	78	CGPoint now = ((SendPoint)objc_msgSend)(event_class, sel_registerName("mouseLocation"));
	79	CGRect moved = frame;
	80	moved.origin.x += now.x - start.x;
	81	moved.origin.y += now.y - start.y;
	82	moved = ((CGRect (*)(id, SEL, CGRect, id))objc_msgSend_stret)(
	83	self, sel_registerName("constrainFrameRect:toScreen:"), moved, SEND(self, "screen"));
	84	((void (*)(id, SEL, CGPoint))objc_msgSend)(self, sel_registerName("setFrameOrigin:"), moved.origin);
	85	}
	86	}
	87
56	88	static id srgb_color(id self, SEL _cmd, CGFloat red, CGFloat green, CGFloat blue, CGFloat alpha) {
57	89	CGFloat components[] = {red, green, blue, alpha};
58	90	return ((id ()(id, SEL, id, CGFloat , long))objc_msgSend)(
...	...	@@ -106,7 +138,7 @@ __attribute__((constructor)) static void polyfill(void) {
106	138	add("NSWindow", 0, "backingScaleFactor", one, "d@:");
107	139	add("NSWindow", 0, "convertRectToScreen:", rect_to_screen, RECT "@:" RECT);
108	140	add("NSWindow", 0, "convertPointFromScreen:", point_from_screen, "{CGPoint=dd}@:{CGPoint=dd}");
109		add("NSWindow", 0, "performWindowDragWithEvent:", ignore, "v@:@");
	141	add("NSWindow", 0, "performWindowDragWithEvent:", window_drag, "v@:@");
110	142	add("NSWindow", 0, "toggleFullScreen:", ignore, "v@:@");
111	143	add("NSWindow", 0, "setTabbingMode:", ignore, "v@:q");
112	144	add("NSWindow", 0, "setTabbingIdentifier:", ignore, "v@:@");