More go fmt. That completes the main package go fmt. Won't bother with test or tools.

area.go

@@ -4,10 +4,10 @@ package ui
 
 import (
 	"fmt"
-	"sync"
 	"image"
-	"unsafe"
 	"reflect"
+	"sync"
+	"unsafe"
 )
 
 // Area represents a blank canvas upon which programs may draw anything and receive arbitrary events from the user.
@@ -186,6 +186,7 @@ type KeyEvent struct {
 
 // ExtKey represents keys that are not in the typewriter section of the keyboard.
 type ExtKey uintptr
+
 const (
 	Escape ExtKey = iota + 1
 	Insert        // equivalent to "Help" on Apple keyboards
@@ -241,7 +242,7 @@ func (e KeyEvent) EffectiveKey() byte {
 	k := e.ExtKey
 	switch {
 	case k >= N0 && k <= N9:
-		return byte(k - N0) + '0'
+		return byte(k-N0) + '0'
 	case k == NDot:
 		return '.'
 	case k == NEnter:
@@ -262,6 +263,7 @@ func (e KeyEvent) EffectiveKey() byte {
 // There is no way to differentiate between left and right modifier keys.
 // As such, what KeyEvents get sent if the user does something unusual with both of a certain modifier key at once is undefined.
 type Modifiers uintptr
+
 const (
 	Ctrl  Modifiers = 1 << iota // the keys labelled Ctrl or Control on all platforms
 	Alt                         // the keys labelled Alt or Option or Meta on all platforms
@@ -373,16 +375,16 @@ func toARGB(i *image.RGBA, memory uintptr, memstride int) {
 		nextp := p + i.Stride
 		nextq := q + memstride
 		for x := i.Rect.Min.X; x < i.Rect.Max.X; x++ {
-			argb := uint32(i.Pix[p + 3]) << 24		// A
-			argb |= uint32(i.Pix[p + 0]) << 16		// R
-			argb |= uint32(i.Pix[p + 1]) << 8		// G
-			argb |= uint32(i.Pix[p + 2])			// B
+			argb := uint32(i.Pix[p+3]) << 24 // A
+			argb |= uint32(i.Pix[p+0]) << 16 // R
+			argb |= uint32(i.Pix[p+1]) << 8  // G
+			argb |= uint32(i.Pix[p+2])       // B
 			// the magic of conversion
 			native := (*[4]byte)(unsafe.Pointer(&argb))
-			realbits[q + 0] = native[0]
-			realbits[q + 1] = native[1]
-			realbits[q + 2] = native[2]
-			realbits[q + 3] = native[3]
+			realbits[q+0] = native[0]
+			realbits[q+1] = native[1]
+			realbits[q+2] = native[2]
+			realbits[q+3] = native[3]
 			p += 4
 			q += 4
 		}

area_darwin.go

@@ -3,8 +3,8 @@
 package ui
 
 import (
-	"unsafe"
 	"image"
+	"unsafe"
 )
 
 // #include <stdlib.h>
@@ -28,7 +28,7 @@ func areaView_drawRect(self C.id, rect C.struct_xrect) {
 	s := getSysData(self)
 	// no need to clear the clip rect; the NSScrollView does that for us (see the setDrawsBackground: call in objc_darwin.m)
 	// rectangles in Cocoa are origin/size, not point0/point1; if we don't watch for this, weird things will happen when scrolling
-	cliprect := image.Rect(int(rect.x), int(rect.y), int(rect.x + rect.width), int(rect.y + rect.height))
+	cliprect := image.Rect(int(rect.x), int(rect.y), int(rect.x+rect.width), int(rect.y+rect.height))
 	max := C.frame(self)
 	cliprect = image.Rect(0, 0, int(max.width), int(max.height)).Intersect(cliprect)
 	if cliprect.Empty() { // no intersection; nothing to paint
@@ -93,18 +93,18 @@ func areaMouseEvent(self C.id, e C.id, click bool, up bool) {
 	}
 	// the docs do say don't use this for tracking (mouseMoved:) since it returns the state now, and mouse move events work by tracking, but as far as I can tell dragging the mouse over the inactive window does not generate an event on Mac OS X, so :/ (tracking doesn't touch dragging anyway except during mouseEntered: and mouseExited:, which we don't handle, and the only other tracking message, cursorChanged:, we also don't handle (yet...? need to figure out if this is how to set custom cursors or not), so)
 	held := C.pressedMouseButtons()
-	if which != 1 && (held & 1) != 0 {		// button 1
+	if which != 1 && (held&1) != 0 { // button 1
 		me.Held = append(me.Held, 1)
 	}
-	if which != 2 && (held & 4) != 0 {		// button 2; mind the swap
+	if which != 2 && (held&4) != 0 { // button 2; mind the swap
 		me.Held = append(me.Held, 2)
 	}
-	if which != 3 && (held & 2) != 0 {		// button 3
+	if which != 3 && (held&2) != 0 { // button 3
 		me.Held = append(me.Held, 3)
 	}
 	held >>= 3
 	for i := uint(4); held != 0; i++ {
-		if which != i && (held & 1) != 0 {
+		if which != i && (held&1) != 0 {
 			me.Held = append(me.Held, i)
 		}
 		held >>= 1