test(core): cover auto-fullscreen focus rules

commit: 2ca07b7799ef7ad9e857a1c42c53c8c89dc7c9d4
author: brice · 14h ago · 2026-10-23 00:55 UTC
parent: bc208ba
signature: GPG VerifiedCD88F9E564E0102646FB6077A1A07C7C7C3E349D · arch-gpg Verified for the committer email

3 files · +54 -5

M docs/config.md +1 -1


@@ -260,7 +260,7 @@ bind.XF86MonBrightnessDown = spawn brightnessctl set 5%-
260	260		\| `scale-up` / `scale-down` \| Zoom the display; the scale is saved to the config \|
261	261		\| `quit` \| Exit NeferWL \|
262	262
263		-	A parentless window whose first committed size is exactly the logical size of the output it is on, without asking for fullscreen (a game in borderless-windowed mode), is put fullscreen as if by `toggle-fullscreen`, without being resized, when it is the focused window of the shown workspace. Later resizes do not.
	263	+	Note on `toggle-fullscreen`: a parentless window whose first committed size is exactly the logical size of the output it is on, without asking for fullscreen (a game in borderless-windowed mode), is put fullscreen as if by `toggle-fullscreen`, without being resized, when it is the focused window of the shown workspace. Later resizes do not.
264	264
265	265		### Default binds
266	266


@@ -260,7 +260,7 @@ bind.XF86MonBrightnessDown = spawn brightnessctl set 5%-
260		\| `scale-up` / `scale-down` \| Zoom the display; the scale is saved to the config \|	260		\| `scale-up` / `scale-down` \| Zoom the display; the scale is saved to the config \|
261		\| `quit` \| Exit NeferWL \|	261		\| `quit` \| Exit NeferWL \|
262			262
263	-	A parentless window whose first committed size is exactly the logical size of the output it is on, without asking for fullscreen (a game in borderless-windowed mode), is put fullscreen as if by `toggle-fullscreen`, without being resized, when it is the focused window of the shown workspace. Later resizes do not.	263	+	Note on `toggle-fullscreen`: a parentless window whose first committed size is exactly the logical size of the output it is on, without asking for fullscreen (a game in borderless-windowed mode), is put fullscreen as if by `toggle-fullscreen`, without being resized, when it is the focused window of the shown workspace. Later resizes do not.
264			264
265		### Default binds	265		### Default binds
266			266

M internal/adapters/wayland/xdg.go +3 -3


@@ -418,10 +418,10 @@ func (w *window) afterCommit() {
418	418		return
419	419		}
420	420		if !w.floating {
421		-	// Core is authoritative: this prefilter matches any output, and
422		-	// core compares with the output the window is on.
423	421		// Core reads a tile's first size once, to spot a window that maps
424		-	// at its output's size without asking for fullscreen.
	422	+	// at its output's size without asking for fullscreen. This
	423	+	// prefilter accepts any output size; core compares with the output
	424	+	// the window is on.
425	425		if fw, fh := w.size(); !w.sized && fw > 0 && fh > 0 {
426	426		w.sized = true
427	427		if !w.xdg.server.outputSized(fw, fh) {

 		return
 	}
 	if !w.floating {
-		// Core is authoritative: this prefilter matches any output, and
-		// core compares with the output the window is on.
 		// Core reads a tile's first size once, to spot a window that maps
-		// at its output's size without asking for fullscreen.
+		// at its output's size without asking for fullscreen. This
+		// prefilter accepts any output size; core compares with the output
+		// the window is on.
 		if fw, fh := w.size(); !w.sized && fw > 0 && fh > 0 {
 			w.sized = true
 			if !w.xdg.server.outputSized(fw, fh) {

M internal/core/legacy_fullscreen_internal_test.go +50 -1


@@ -120,7 +120,7 @@ func TestLegacyFullscreenRespectsFocus(t *testing.T) {
120	120		ws := sc.mon.Current()
121	121		sc.mon.Focus(1)
122	122		if sc.mon.Current() == ws {
123		-	t.Skip("no second workspace")
	123	+	t.Fatal("setup: no second workspace")
124	124		}
125	125		o := sc.rect()
126	126		c.resizeFloating(ports.WindowResized{ID: 1, Width: o.W, Height: o.H})

@@ -167,3 +167,52 @@ func TestLegacyFullscreenRemapAndOutputs(t *testing.T) {
167	167		}
168	168		})
169	169		}
	170	+
	171	+	// Only the focused window of the shown workspace is a candidate.
	172	+	func TestLegacyFullscreenNeedsFocusAtFirstSize(t *testing.T) {
	173	+	t.Run("focus moved before the commit", func(t *testing.T) {
	174	+	c, _, _ := fadeCore(t)
	175	+	sc := c.cur()
	176	+	c.mapWindow(ports.WindowMapped{ID: 1})
	177	+	c.mapWindow(ports.WindowMapped{ID: 2})
	178	+	w := sc.mon.Current()
	179	+	w.FocusID(1)
	180	+	o := sc.rect()
	181	+	c.resizeFloating(ports.WindowResized{ID: 2, Width: o.W, Height: o.H})
	182	+	if w.fullscreen != 0 {
	183	+	t.Fatalf("unfocused window went fullscreen: %d", w.fullscreen)
	184	+	}
	185	+	if id, _ := w.Focused(); id != 1 {
	186	+	t.Fatalf("focus moved to %d", id)
	187	+	}
	188	+	})
	189	+	t.Run("quiet column", func(t *testing.T) {
	190	+	c, _, _ := fadeCore(t)
	191	+	sc := c.cur()
	192	+	c.mapWindow(ports.WindowMapped{ID: 1})
	193	+	c.windows.mapped(ports.WindowMapped{ID: 2}, c.now())
	194	+	w := sc.mon.Current()
	195	+	w.addColumnQuiet(Column{Windows: []WindowID{2}})
	196	+	o := sc.rect()
	197	+	c.resizeFloating(ports.WindowResized{ID: 2, Width: o.W, Height: o.H})
	198	+	if w.fullscreen != 0 {
	199	+	t.Fatalf("quiet window went fullscreen: %d", w.fullscreen)
	200	+	}
	201	+	if id, _ := w.Focused(); id != 1 {
	202	+	t.Fatalf("focus moved to %d", id)
	203	+	}
	204	+	})
	205	+	t.Run("quiet float", func(t *testing.T) {
	206	+	c, _, _ := fadeCore(t)
	207	+	sc := c.cur()
	208	+	c.mapWindow(ports.WindowMapped{ID: 1})
	209	+	c.windows.mapped(ports.WindowMapped{ID: 2, Floating: true}, c.now())
	210	+	w := sc.mon.Current()
	211	+	w.addFloat(Float{ID: 2}, true)
	212	+	o := sc.rect()
	213	+	c.resizeFloating(ports.WindowResized{ID: 2, Width: o.W, Height: o.H})
	214	+	if w.fullscreen != 0 {
	215	+	t.Fatalf("quiet float went fullscreen: %d", w.fullscreen)
	216	+	}
	217	+	})
	218	+	}


@@ -120,7 +120,7 @@ func TestLegacyFullscreenRespectsFocus(t *testing.T) {
120		ws := sc.mon.Current()	120		ws := sc.mon.Current()
121		sc.mon.Focus(1)	121		sc.mon.Focus(1)
122		if sc.mon.Current() == ws {	122		if sc.mon.Current() == ws {
123	-	t.Skip("no second workspace")	123	+	t.Fatal("setup: no second workspace")
124		}	124		}
125		o := sc.rect()	125		o := sc.rect()
126		c.resizeFloating(ports.WindowResized{ID: 1, Width: o.W, Height: o.H})	126		c.resizeFloating(ports.WindowResized{ID: 1, Width: o.W, Height: o.H})

@@ -167,3 +167,52 @@ func TestLegacyFullscreenRemapAndOutputs(t *testing.T) {
167		}	167		}
168		})	168		})
169		}	169		}
			170	+
			171	+	// Only the focused window of the shown workspace is a candidate.
			172	+	func TestLegacyFullscreenNeedsFocusAtFirstSize(t *testing.T) {
			173	+	t.Run("focus moved before the commit", func(t *testing.T) {
			174	+	c, _, _ := fadeCore(t)
			175	+	sc := c.cur()
			176	+	c.mapWindow(ports.WindowMapped{ID: 1})
			177	+	c.mapWindow(ports.WindowMapped{ID: 2})
			178	+	w := sc.mon.Current()
			179	+	w.FocusID(1)
			180	+	o := sc.rect()
			181	+	c.resizeFloating(ports.WindowResized{ID: 2, Width: o.W, Height: o.H})
			182	+	if w.fullscreen != 0 {
			183	+	t.Fatalf("unfocused window went fullscreen: %d", w.fullscreen)
			184	+	}
			185	+	if id, _ := w.Focused(); id != 1 {
			186	+	t.Fatalf("focus moved to %d", id)
			187	+	}
			188	+	})
			189	+	t.Run("quiet column", func(t *testing.T) {
			190	+	c, _, _ := fadeCore(t)
			191	+	sc := c.cur()
			192	+	c.mapWindow(ports.WindowMapped{ID: 1})
			193	+	c.windows.mapped(ports.WindowMapped{ID: 2}, c.now())
			194	+	w := sc.mon.Current()
			195	+	w.addColumnQuiet(Column{Windows: []WindowID{2}})
			196	+	o := sc.rect()
			197	+	c.resizeFloating(ports.WindowResized{ID: 2, Width: o.W, Height: o.H})
			198	+	if w.fullscreen != 0 {
			199	+	t.Fatalf("quiet window went fullscreen: %d", w.fullscreen)
			200	+	}
			201	+	if id, _ := w.Focused(); id != 1 {
			202	+	t.Fatalf("focus moved to %d", id)
			203	+	}
			204	+	})
			205	+	t.Run("quiet float", func(t *testing.T) {
			206	+	c, _, _ := fadeCore(t)
			207	+	sc := c.cur()
			208	+	c.mapWindow(ports.WindowMapped{ID: 1})
			209	+	c.windows.mapped(ports.WindowMapped{ID: 2, Floating: true}, c.now())
			210	+	w := sc.mon.Current()
			211	+	w.addFloat(Float{ID: 2}, true)
			212	+	o := sc.rect()
			213	+	c.resizeFloating(ports.WindowResized{ID: 2, Width: o.W, Height: o.H})
			214	+	if w.fullscreen != 0 {
			215	+	t.Fatalf("quiet float went fullscreen: %d", w.fullscreen)
			216	+	}
			217	+	})
			218	+	}