all: move Now from system.Config to system.FrameEvent

Then, make layout.Context.Now a field, copied from FrameEvent.Now.

API change:

	gofmt -r 'gtx.Now() -> gtx.Now'

Signed-off-by: Elias Naur <mail@eliasnaur.com>

app/internal/window/os_android.go

@@ -384,6 +384,7 @@ func (w *window) draw(sync bool) {
 	ppdp := float32(w.dpi) * inchPrDp
 	w.callbacks.Event(FrameEvent{
 		FrameEvent: system.FrameEvent{
+			Now: time.Now(),
 			Size: image.Point{
 				X: int(width),
 				Y: int(height),
@@ -392,7 +393,6 @@ func (w *window) draw(sync bool) {
 			Config: &config{
 				pxPerDp: ppdp,
 				pxPerSp: w.fontScale * ppdp,
-				now:     time.Now(),
 			},
 		},
 		Sync: sync,

app/internal/window/os_ios.go

@@ -108,6 +108,7 @@ func (w *window) draw(sync bool) {
 	const inchPrDp = 1.0 / 163
 	w.w.Event(FrameEvent{
 		FrameEvent: system.FrameEvent{
+			Now: time.Now(),
 			Size: image.Point{
 				X: int(params.width + .5),
 				Y: int(params.height + .5),
@@ -121,7 +122,6 @@ func (w *window) draw(sync bool) {
 			Config: &config{
 				pxPerDp: float32(params.dpi) * inchPrDp,
 				pxPerSp: float32(params.sdpi) * inchPrDp,
-				now:     time.Now(),
 			},
 		},
 		Sync: sync,

app/internal/window/os_js.go

@@ -413,9 +413,9 @@ func (w *window) draw(sync bool) {
 	w.mu.Lock()
 	w.scale = float32(scale)
 	w.mu.Unlock()
-	cfg.now = time.Now()
 	w.w.Event(FrameEvent{
 		FrameEvent: system.FrameEvent{
+			Now: time.Now(),
 			Size: image.Point{
 				X: width,
 				Y: height,

app/internal/window/os_macos.go

@@ -228,10 +228,10 @@ func (w *window) draw() {
 	width := int(wf*w.scale + .5)
 	height := int(hf*w.scale + .5)
 	cfg := configFor(w.scale)
-	cfg.now = time.Now()
 	w.setStage(system.StageRunning)
 	w.w.Event(FrameEvent{
 		FrameEvent: system.FrameEvent{
+			Now: time.Now(),
 			Size: image.Point{
 				X: width,
 				Y: height,

app/internal/window/os_wayland.go

@@ -1385,9 +1385,9 @@ func (w *window) draw(sync bool) {
 		// Use the surface as listener data for gio_onFrameDone.
 		C.wl_callback_add_listener(w.lastFrameCallback, &C.gio_callback_listener, unsafe.Pointer(w.surf))
 	}
-	cfg.now = time.Now()
 	w.w.Event(FrameEvent{
 		FrameEvent: system.FrameEvent{
+			Now: time.Now(),
 			Size: image.Point{
 				X: width,
 				Y: height,

app/internal/window/os_windows.go

@@ -370,9 +370,9 @@ func (w *window) draw(sync bool) {
 		return
 	}
 	cfg := configForDC()
-	cfg.now = time.Now()
 	w.w.Event(FrameEvent{
 		FrameEvent: system.FrameEvent{
+			Now: time.Now(),
 			Size: image.Point{
 				X: w.width,
 				Y: w.height,

app/internal/window/os_x11.go

@@ -184,9 +184,9 @@ loop:
 		}
 
 		if anim || syn {
-			w.cfg.now = time.Now()
 			w.w.Event(FrameEvent{
 				FrameEvent: system.FrameEvent{
+					Now: time.Now(),
 					Size: image.Point{
 						X: w.width,
 						Y: w.height,

app/internal/window/window.go

@@ -7,7 +7,6 @@ package window
 import (
 	"errors"
 	"math"
-	"time"
 
 	"gioui.org/gpu/backend"
 	"gioui.org/io/event"
@@ -78,11 +77,6 @@ type config struct {
 	pxPerDp float32
 	// Device pixels per sp.
 	pxPerSp float32
-	now     time.Time
-}
-
-func (c *config) Now() time.Time {
-	return c.now
 }
 
 func (c *config) Px(v unit.Value) int {