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-rw-r--r--lib/ui/borders.go9
-rw-r--r--lib/ui/grid.go14
-rw-r--r--lib/ui/invalidatable.go24
-rw-r--r--lib/ui/text.go22
4 files changed, 37 insertions, 32 deletions
diff --git a/lib/ui/borders.go b/lib/ui/borders.go
index 9b7860e4..cffd3ca3 100644
--- a/lib/ui/borders.go
+++ b/lib/ui/borders.go
@@ -12,6 +12,7 @@ const (
)
type Bordered struct {
+ Invalidatable
borders uint
content Drawable
onInvalidate func(d Drawable)
@@ -35,13 +36,7 @@ func (bordered *Bordered) Children() []Drawable {
}
func (bordered *Bordered) Invalidate() {
- if bordered.onInvalidate != nil {
- bordered.onInvalidate(bordered)
- }
-}
-
-func (bordered *Bordered) OnInvalidate(onInvalidate func(d Drawable)) {
- bordered.onInvalidate = onInvalidate
+ bordered.DoInvalidate(bordered)
}
func (bordered *Bordered) Draw(ctx *Context) {
diff --git a/lib/ui/grid.go b/lib/ui/grid.go
index 87b94bde..3ac43a42 100644
--- a/lib/ui/grid.go
+++ b/lib/ui/grid.go
@@ -6,12 +6,12 @@ import (
)
type Grid struct {
+ Invalidatable
rows []GridSpec
rowLayout []gridLayout
columns []GridSpec
columnLayout []gridLayout
cells []*GridCell
- onInvalidate func(d Drawable)
invalid bool
}
@@ -141,9 +141,7 @@ func (grid *Grid) reflow(ctx *Context) {
func (grid *Grid) invalidateLayout() {
grid.invalid = true
- if grid.onInvalidate != nil {
- grid.onInvalidate(grid)
- }
+ grid.DoInvalidate(grid)
}
func (grid *Grid) Invalidate() {
@@ -153,10 +151,6 @@ func (grid *Grid) Invalidate() {
}
}
-func (grid *Grid) OnInvalidate(onInvalidate func(d Drawable)) {
- grid.onInvalidate = onInvalidate
-}
-
func (grid *Grid) AddChild(content Drawable) *GridCell {
cell := &GridCell{
RowSpan: 1,
@@ -193,7 +187,5 @@ func (grid *Grid) cellInvalidated(drawable Drawable) {
panic(fmt.Errorf("Attempted to invalidate unknown cell"))
}
cell.invalid = true
- if grid.onInvalidate != nil {
- grid.onInvalidate(grid)
- }
+ grid.DoInvalidate(grid)
}
diff --git a/lib/ui/invalidatable.go b/lib/ui/invalidatable.go
new file mode 100644
index 00000000..92757121
--- /dev/null
+++ b/lib/ui/invalidatable.go
@@ -0,0 +1,24 @@
+package ui
+
+import (
+ "sync/atomic"
+)
+
+type Invalidatable struct {
+ onInvalidate atomic.Value
+}
+
+func (i *Invalidatable) OnInvalidate(f func(d Drawable)) {
+ i.onInvalidate.Store(f)
+}
+
+func (i *Invalidatable) DoInvalidate(d Drawable) {
+ v := i.onInvalidate.Load()
+ if v == nil {
+ return
+ }
+ f := v.(func(d Drawable))
+ if f != nil {
+ f(d)
+ }
+}
diff --git a/lib/ui/text.go b/lib/ui/text.go
index 761673c7..8aea8eb5 100644
--- a/lib/ui/text.go
+++ b/lib/ui/text.go
@@ -12,13 +12,13 @@ const (
)
type Text struct {
- text string
- strategy uint
- fg tcell.Color
- bg tcell.Color
- bold bool
- reverse bool
- onInvalidate func(d Drawable)
+ Invalidatable
+ text string
+ strategy uint
+ fg tcell.Color
+ bg tcell.Color
+ bold bool
+ reverse bool
}
func NewText(text string) *Text {
@@ -80,12 +80,6 @@ func (t *Text) Draw(ctx *Context) {
ctx.Printf(x, 0, style, t.text)
}
-func (t *Text) OnInvalidate(onInvalidate func(d Drawable)) {
- t.onInvalidate = onInvalidate
-}
-
func (t *Text) Invalidate() {
- if t.onInvalidate != nil {
- t.onInvalidate(t)
- }
+ t.DoInvalidate(t)
}