invalidatable: cleanup dead code

Remove invalidatable type and all associated calls. All items can
directly invalidate the UI.

Signed-off-by: Tim Culverhouse <tim@timculverhouse.com>
Acked-by: Robin Jarry <robin@jarry.cc>

41 files changed, 76 insertions, 303 deletions

diff --git a/commands/account/compose.go b/commands/account/compose.go
index fc7617ec..16474b4c 100644
--- a/commands/account/compose.go
+++ b/commands/account/compose.go
@@ -10,6 +10,7 @@ import (
 
 	"github.com/emersion/go-message/mail"
 
+	"git.sr.ht/~rjarry/aerc/lib/ui"
 	"git.sr.ht/~rjarry/aerc/logging"
 	"git.sr.ht/~rjarry/aerc/models"
 	"git.sr.ht/~rjarry/aerc/widgets"
@@ -64,7 +65,7 @@ func (Compose) Execute(aerc *widgets.Aerc, args []string) error {
 		} else {
 			tab.Name = subject
 		}
-		tab.Content.Invalidate()
+		ui.Invalidate()
 	})
 	go func() {
 		defer logging.PanicHandler()
diff --git a/commands/account/next-result.go b/commands/account/next-result.go
index daa7af3c..922f95a1 100644
--- a/commands/account/next-result.go
+++ b/commands/account/next-result.go
@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 
+	"git.sr.ht/~rjarry/aerc/lib/ui"
 	"git.sr.ht/~rjarry/aerc/widgets"
 )
 
@@ -34,13 +35,13 @@ func (NextPrevResult) Execute(aerc *widgets.Aerc, args []string) error {
 		if store != nil {
 			store.PrevResult()
 		}
-		acct.Messages().Invalidate()
+		ui.Invalidate()
 	} else {
 		store := acct.Store()
 		if store != nil {
 			store.NextResult()
 		}
-		acct.Messages().Invalidate()
+		ui.Invalidate()
 	}
 	return nil
 }
diff --git a/commands/account/next.go b/commands/account/next.go
index c9c26809..15dc5363 100644
--- a/commands/account/next.go
+++ b/commands/account/next.go
@@ -6,6 +6,7 @@ import (
 	"strconv"
 	"strings"
 
+	"git.sr.ht/~rjarry/aerc/lib/ui"
 	"git.sr.ht/~rjarry/aerc/widgets"
 )
 
@@ -65,13 +66,13 @@ func ExecuteNextPrevMessage(args []string, acct *widgets.AccountView, pct bool,
 		store := acct.Store()
 		if store != nil {
 			store.NextPrev(-n)
-			acct.Messages().Invalidate()
+			ui.Invalidate()
 		}
 	} else {
 		store := acct.Store()
 		if store != nil {
 			store.NextPrev(n)
-			acct.Messages().Invalidate()
+			ui.Invalidate()
 		}
 	}
 	return nil
diff --git a/commands/account/recover.go b/commands/account/recover.go
index 682a99c5..b8acd261 100644
--- a/commands/account/recover.go
+++ b/commands/account/recover.go
@@ -8,6 +8,7 @@ import (
 	"path/filepath"
 
 	"git.sr.ht/~rjarry/aerc/commands"
+	"git.sr.ht/~rjarry/aerc/lib/ui"
 	"git.sr.ht/~rjarry/aerc/logging"
 	"git.sr.ht/~rjarry/aerc/models"
 	"git.sr.ht/~rjarry/aerc/widgets"
@@ -110,7 +111,7 @@ func (Recover) Execute(aerc *widgets.Aerc, args []string) error {
 	tab := aerc.NewTab(composer, "Recovered")
 	composer.OnHeaderChange("Subject", func(subject string) {
 		tab.Name = subject
-		tab.Content.Invalidate()
+		ui.Invalidate()
 	})
 	go func() {
 		defer logging.PanicHandler()
diff --git a/commands/account/search.go b/commands/account/search.go
index 82099249..b4942bf5 100644
--- a/commands/account/search.go
+++ b/commands/account/search.go
@@ -5,6 +5,7 @@ import (
 	"strings"
 
 	"git.sr.ht/~rjarry/aerc/lib/statusline"
+	"git.sr.ht/~rjarry/aerc/lib/ui"
 	"git.sr.ht/~rjarry/aerc/logging"
 	"git.sr.ht/~rjarry/aerc/widgets"
 	"git.sr.ht/~rjarry/aerc/worker/types"
@@ -54,7 +55,7 @@ func (SearchFilter) Execute(aerc *widgets.Aerc, args []string) error {
 			logging.Infof("Search results: %v", uids)
 			store.ApplySearch(uids)
 			// TODO: Remove when stores have multiple OnUpdate handlers
-			acct.Messages().Invalidate()
+			ui.Invalidate()
 		}
 		store.Search(args, cb)
 	}
diff --git a/commands/msg/archive.go b/commands/msg/archive.go
index d485fd3d..beba3a63 100644
--- a/commands/msg/archive.go
+++ b/commands/msg/archive.go
@@ -9,6 +9,7 @@ import (
 
 	"git.sr.ht/~rjarry/aerc/commands"
 	"git.sr.ht/~rjarry/aerc/lib"
+	"git.sr.ht/~rjarry/aerc/lib/ui"
 	"git.sr.ht/~rjarry/aerc/logging"
 	"git.sr.ht/~rjarry/aerc/models"
 	"git.sr.ht/~rjarry/aerc/widgets"
@@ -117,7 +118,7 @@ func (Archive) Execute(aerc *widgets.Aerc, args []string) error {
 					if next == nil {
 						aerc.RemoveTab(h.msgProvider)
 						acct.Messages().Select(-1)
-						acct.Messages().Invalidate()
+						ui.Invalidate()
 						return
 					}
 					lib.NewMessageStoreView(next, mv.MessageView().SeenFlagSet(),
diff --git a/commands/msg/delete.go b/commands/msg/delete.go
index a3d024a7..066476d8 100644
--- a/commands/msg/delete.go
+++ b/commands/msg/delete.go
@@ -5,6 +5,7 @@ import (
 	"time"
 
 	"git.sr.ht/~rjarry/aerc/lib"
+	"git.sr.ht/~rjarry/aerc/lib/ui"
 	"git.sr.ht/~rjarry/aerc/models"
 	"git.sr.ht/~rjarry/aerc/widgets"
 	"git.sr.ht/~rjarry/aerc/worker/types"
@@ -60,7 +61,7 @@ func (Delete) Execute(aerc *widgets.Aerc, args []string) error {
 					if next == nil {
 						aerc.RemoveTab(h.msgProvider)
 						acct.Messages().Select(-1)
-						acct.Messages().Invalidate()
+						ui.Invalidate()
 						return
 					}
 					lib.NewMessageStoreView(next, mv.MessageView().SeenFlagSet(),
diff --git a/commands/msg/forward.go b/commands/msg/forward.go
index 6f59a1bb..4adfd128 100644
--- a/commands/msg/forward.go
+++ b/commands/msg/forward.go
@@ -14,6 +14,7 @@ import (
 
 	"git.sr.ht/~rjarry/aerc/lib"
 	"git.sr.ht/~rjarry/aerc/lib/format"
+	"git.sr.ht/~rjarry/aerc/lib/ui"
 	"git.sr.ht/~rjarry/aerc/logging"
 	"git.sr.ht/~rjarry/aerc/models"
 	"git.sr.ht/~rjarry/aerc/widgets"
@@ -117,7 +118,7 @@ func (forward) Execute(aerc *widgets.Aerc, args []string) error {
 			} else {
 				tab.Name = subject
 			}
-			tab.Content.Invalidate()
+			ui.Invalidate()
 		})
 		return composer, nil
 	}
diff --git a/commands/msg/invite.go b/commands/msg/invite.go
index 4e8d01dd..37a194a6 100644
--- a/commands/msg/invite.go
+++ b/commands/msg/invite.go
@@ -8,6 +8,7 @@ import (
 	"git.sr.ht/~rjarry/aerc/lib"
 	"git.sr.ht/~rjarry/aerc/lib/calendar"
 	"git.sr.ht/~rjarry/aerc/lib/format"
+	"git.sr.ht/~rjarry/aerc/lib/ui"
 	"git.sr.ht/~rjarry/aerc/logging"
 	"git.sr.ht/~rjarry/aerc/models"
 	"git.sr.ht/~rjarry/aerc/widgets"
@@ -167,7 +168,7 @@ func (invite) Execute(aerc *widgets.Aerc, args []string) error {
 			} else {
 				tab.Name = subject
 			}
-			tab.Content.Invalidate()
+			ui.Invalidate()
 		})
 
 		composer.OnClose(func(c *widgets.Composer) {
diff --git a/commands/msg/recall.go b/commands/msg/recall.go
index 52d4ee89..c5585b05 100644
--- a/commands/msg/recall.go
+++ b/commands/msg/recall.go
@@ -13,6 +13,7 @@ import (
 	"github.com/pkg/errors"
 
 	"git.sr.ht/~rjarry/aerc/lib"
+	"git.sr.ht/~rjarry/aerc/lib/ui"
 	"git.sr.ht/~rjarry/aerc/logging"
 	"git.sr.ht/~rjarry/aerc/models"
 	"git.sr.ht/~rjarry/aerc/widgets"
@@ -93,7 +94,7 @@ func (Recall) Execute(aerc *widgets.Aerc, args []string) error {
 			} else {
 				tab.Name = subject
 			}
-			tab.Content.Invalidate()
+			ui.Invalidate()
 		})
 		composer.OnClose(func(composer *widgets.Composer) {
 			worker := composer.Worker()
diff --git a/commands/msg/reply.go b/commands/msg/reply.go
index e5f8d478..1baef838 100644
--- a/commands/msg/reply.go
+++ b/commands/msg/reply.go
@@ -13,6 +13,7 @@ import (
 	"git.sr.ht/~rjarry/aerc/lib"
 	"git.sr.ht/~rjarry/aerc/lib/crypto"
 	"git.sr.ht/~rjarry/aerc/lib/format"
+	"git.sr.ht/~rjarry/aerc/lib/ui"
 	"git.sr.ht/~rjarry/aerc/logging"
 	"git.sr.ht/~rjarry/aerc/models"
 	"git.sr.ht/~rjarry/aerc/widgets"
@@ -194,7 +195,7 @@ func (reply) Execute(aerc *widgets.Aerc, args []string) error {
 			} else {
 				tab.Name = subject
 			}
-			tab.Content.Invalidate()
+			ui.Invalidate()
 		})
 
 		composer.OnClose(func(c *widgets.Composer) {
diff --git a/commands/msg/toggle-threads.go b/commands/msg/toggle-threads.go
index af694bc0..babdc31c 100644
--- a/commands/msg/toggle-threads.go
+++ b/commands/msg/toggle-threads.go
@@ -4,6 +4,7 @@ import (
 	"errors"
 
 	"git.sr.ht/~rjarry/aerc/lib/statusline"
+	"git.sr.ht/~rjarry/aerc/lib/ui"
 	"git.sr.ht/~rjarry/aerc/widgets"
 )
 
@@ -36,6 +37,6 @@ func (ToggleThreads) Execute(aerc *widgets.Aerc, args []string) error {
 	}
 	store.SetThreadedView(!store.ThreadedView())
 	acct.SetStatus(statusline.Threading(store.ThreadedView()))
-	acct.Messages().Invalidate()
+	ui.Invalidate()
 	return nil
 }
diff --git a/commands/msg/unsubscribe.go b/commands/msg/unsubscribe.go
index a9116e9d..022135eb 100644
--- a/commands/msg/unsubscribe.go
+++ b/commands/msg/unsubscribe.go
@@ -9,6 +9,7 @@ import (
 	"time"
 
 	"git.sr.ht/~rjarry/aerc/lib"
+	"git.sr.ht/~rjarry/aerc/lib/ui"
 	"git.sr.ht/~rjarry/aerc/logging"
 	"git.sr.ht/~rjarry/aerc/models"
 	"git.sr.ht/~rjarry/aerc/widgets"
@@ -168,7 +169,7 @@ func unsubscribeMailto(aerc *widgets.Aerc, u *url.URL) error {
 		} else {
 			tab.Name = subject
 		}
-		tab.Content.Invalidate()
+		ui.Invalidate()
 	})
 	composer.FocusTerminal()
 	return nil
diff --git a/commands/term.go b/commands/term.go
index 924f71c9..d6662fe1 100644
--- a/commands/term.go
+++ b/commands/term.go
@@ -5,6 +5,7 @@ import (
 
 	"github.com/riywo/loginshell"
 
+	"git.sr.ht/~rjarry/aerc/lib/ui"
 	"git.sr.ht/~rjarry/aerc/widgets"
 )
 
@@ -41,7 +42,7 @@ func TermCore(aerc *widgets.Aerc, args []string) error {
 			title = args[1]
 		}
 		tab.Name = title
-		tab.Content.Invalidate()
+		ui.Invalidate()
 	}
 	term.OnClose = func(err error) {
 		aerc.RemoveTab(term)
diff --git a/lib/ui/borders.go b/lib/ui/borders.go
index 92e29b06..81d5db61 100644
--- a/lib/ui/borders.go
+++ b/lib/ui/borders.go
@@ -14,7 +14,6 @@ const (
 )
 
 type Bordered struct {
-	Invalidatable
 	borders  uint
 	content  Drawable
 	uiConfig *config.UIConfig
@@ -28,20 +27,15 @@ func NewBordered(
 		content:  content,
 		uiConfig: uiConfig,
 	}
-	content.OnInvalidate(b.contentInvalidated)
 	return b
 }
 
-func (bordered *Bordered) contentInvalidated(d Drawable) {
-	bordered.Invalidate()
-}
-
 func (bordered *Bordered) Children() []Drawable {
 	return []Drawable{bordered.content}
 }
 
 func (bordered *Bordered) Invalidate() {
-	bordered.DoInvalidate(bordered)
+	Invalidate()
 }
 
 func (bordered *Bordered) Draw(ctx *Context) {
diff --git a/lib/ui/fill.go b/lib/ui/fill.go
index 13ad286d..ff248905 100644
--- a/lib/ui/fill.go
+++ b/lib/ui/fill.go
@@ -21,10 +21,6 @@ func (f Fill) Draw(ctx *Context) {
 	}
 }
 
-func (f Fill) OnInvalidate(callback func(d Drawable)) {
-	// no-op
-}
-
 func (f Fill) Invalidate() {
 	// no-op
 }
diff --git a/lib/ui/grid.go b/lib/ui/grid.go
index fe1d03e8..76eba000 100644
--- a/lib/ui/grid.go
+++ b/lib/ui/grid.go
@@ -1,21 +1,17 @@
 package ui
 
 import (
-	"fmt"
 	"math"
 	"sync"
-	"sync/atomic"
 
 	"github.com/gdamore/tcell/v2"
 )
 
 type Grid struct {
-	Invalidatable
 	rows         []GridSpec
 	rowLayout    []gridLayout
 	columns      []GridSpec
 	columnLayout []gridLayout
-	invalid      bool
 
 	// Protected by mutex
 	cells []*GridCell
@@ -51,11 +47,10 @@ type GridCell struct {
 	RowSpan int
 	ColSpan int
 	Content Drawable
-	invalid atomic.Value // bool
 }
 
 func NewGrid() *Grid {
-	return &Grid{invalid: true}
+	return &Grid{}
 }
 
 // MakeGrid creates a grid with the specified number of columns and rows. Each
@@ -95,19 +90,12 @@ func (grid *Grid) Columns(spec []GridSpec) *Grid {
 }
 
 func (grid *Grid) Draw(ctx *Context) {
-	invalid := grid.invalid
-	if invalid {
-		grid.reflow(ctx)
-	}
+	grid.reflow(ctx)
 
 	grid.mutex.RLock()
 	defer grid.mutex.RUnlock()
 
 	for _, cell := range grid.cells {
-		cellInvalid := cell.invalid.Load().(bool)
-		if !cellInvalid && !invalid {
-			continue
-		}
 		rows := grid.rowLayout[cell.Row : cell.Row+cell.RowSpan]
 		cols := grid.columnLayout[cell.Column : cell.Column+cell.ColSpan]
 		x := cols[0].Offset
@@ -142,16 +130,11 @@ func (grid *Grid) Draw(ctx *Context) {
 
 func (grid *Grid) MouseEvent(localX int, localY int, event tcell.Event) {
 	if event, ok := event.(*tcell.EventMouse); ok {
-		invalid := grid.invalid
 
 		grid.mutex.RLock()
 		defer grid.mutex.RUnlock()
 
 		for _, cell := range grid.cells {
-			cellInvalid := cell.invalid.Load().(bool)
-			if !cellInvalid && !invalid {
-				continue
-			}
 			rows := grid.rowLayout[cell.Row : cell.Row+cell.RowSpan]
 			cols := grid.columnLayout[cell.Column : cell.Column+cell.ColSpan]
 			x := cols[0].Offset
@@ -220,23 +203,10 @@ func (grid *Grid) reflow(ctx *Context) {
 	}
 	flow(&grid.rows, &grid.rowLayout, ctx.Height())
 	flow(&grid.columns, &grid.columnLayout, ctx.Width())
-	grid.invalid = false
-}
-
-func (grid *Grid) invalidateLayout() {
-	grid.invalid = true
-	grid.DoInvalidate(grid)
 }
 
 func (grid *Grid) Invalidate() {
-	grid.invalidateLayout()
-	grid.mutex.RLock()
-	for _, cell := range grid.cells {
-		if cell.Content != nil {
-			cell.Content.Invalidate()
-		}
-	}
-	grid.mutex.RUnlock()
+	Invalidate()
 }
 
 func (grid *Grid) AddChild(content Drawable) *GridCell {
@@ -248,9 +218,7 @@ func (grid *Grid) AddChild(content Drawable) *GridCell {
 	grid.mutex.Lock()
 	grid.cells = append(grid.cells, cell)
 	grid.mutex.Unlock()
-	cell.Content.OnInvalidate(grid.cellInvalidated)
-	cell.invalid.Store(true)
-	grid.invalidateLayout()
+	grid.Invalidate()
 	return cell
 }
 
@@ -263,24 +231,7 @@ func (grid *Grid) RemoveChild(content Drawable) {
 		}
 	}
 	grid.mutex.Unlock()
-	grid.invalidateLayout()
-}
-
-func (grid *Grid) cellInvalidated(drawable Drawable) {
-	var cell *GridCell
-	grid.mutex.RLock()
-	for _, cell = range grid.cells {
-		if cell.Content == drawable {
-			break
-		}
-		cell = nil
-	}
-	grid.mutex.RUnlock()
-	if cell == nil {
-		panic(fmt.Errorf("Attempted to invalidate unknown cell"))
-	}
-	cell.invalid.Store(true)
-	grid.DoInvalidate(grid)
+	grid.Invalidate()
 }
 
 func Const(i int) func() int {
diff --git a/lib/ui/interfaces.go b/lib/ui/interfaces.go
index 8a62ecf0..757f81c9 100644
--- a/lib/ui/interfaces.go
+++ b/lib/ui/interfaces.go
@@ -12,10 +12,7 @@ type AercMsg interface{}
 type Drawable interface {
 	// Called when this renderable should draw itself.
 	Draw(ctx *Context)
-	// Specifies a function to call when this cell needs to be redrawn. The
-	// callback may be called in any goroutine.
-	OnInvalidate(callback func(d Drawable))
-	// Invalidates the drawable. This can be called from any goroutine.
+	// Invalidates the UI. This can be called from any goroutine.
 	Invalidate()
 }
 
diff --git a/lib/ui/invalidatable.go b/lib/ui/invalidatable.go
deleted file mode 100644
index fc354bde..00000000
--- a/lib/ui/invalidatable.go
+++ /dev/null
@@ -1,17 +0,0 @@
-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) {
-	atomic.StoreInt32(&dirty, DIRTY)
-}
diff --git a/lib/ui/popover.go b/lib/ui/popover.go
index 8c8c4cda..9cc491da 100644
--- a/lib/ui/popover.go
+++ b/lib/ui/popover.go
@@ -53,11 +53,5 @@ func (p *Popover) Focus(f bool) {
 }
 
 func (p *Popover) Invalidate() {
-	p.content.Invalidate()
-}
-
-func (p *Popover) OnInvalidate(f func(Drawable)) {
-	p.content.OnInvalidate(func(_ Drawable) {
-		f(p)
-	})
+	Invalidate()
 }
diff --git a/lib/ui/stack.go b/lib/ui/stack.go
index 5ccf13bc..c0aca4e4 100644
--- a/lib/ui/stack.go
+++ b/lib/ui/stack.go
@@ -9,9 +9,8 @@ import (
 )
 
 type Stack struct {
-	children     []Drawable
-	onInvalidate []func(d Drawable)
-	uiConfig     config.UIConfig
+	children []Drawable
+	uiConfig config.UIConfig
 }
 
 func NewStack(uiConfig config.UIConfig) *Stack {
@@ -22,14 +21,8 @@ func (stack *Stack) Children() []Drawable {
 	return stack.children
 }
 
-func (stack *Stack) OnInvalidate(onInvalidate func(d Drawable)) {
-	stack.onInvalidate = append(stack.onInvalidate, onInvalidate)
-}
-
 func (stack *Stack) Invalidate() {
-	for _, fn := range stack.onInvalidate {
-		fn(stack)
-	}
+	Invalidate()
 }
 
 func (stack *Stack) Draw(ctx *Context) {
@@ -50,11 +43,7 @@ func (stack *Stack) MouseEvent(localX int, localY int, event tcell.Event) {
 }
 
 func (stack *Stack) Push(d Drawable) {
-	if len(stack.children) != 0 {
-		stack.Peek().OnInvalidate(nil)
-	}
 	stack.children = append(stack.children, d)
-	d.OnInvalidate(stack.invalidateFromChild)
 	stack.Invalidate()
 }
 
@@ -65,10 +54,6 @@ func (stack *Stack) Pop() Drawable {
 	d := stack.children[len(stack.children)-1]
 	stack.children = stack.children[:len(stack.children)-1]
 	stack.Invalidate()
-	d.OnInvalidate(nil)
-	if len(stack.children) != 0 {
-		stack.Peek().OnInvalidate(stack.invalidateFromChild)
-	}
 	return d
 }
 
@@ -78,7 +63,3 @@ func (stack *Stack) Peek() Drawable {
 	}
 	return stack.children[len(stack.children)-1]
 }
-
-func (stack *Stack) invalidateFromChild(d Drawable) {
-	stack.Invalidate()
-}
diff --git a/lib/ui/tab.go b/lib/ui/tab.go
index df76ccca..d4841efc 100644
--- a/lib/ui/tab.go
+++ b/lib/ui/tab.go
@@ -20,9 +20,6 @@ type Tabs struct {
 
 	uiConfig *config.UIConfig
 
-	onInvalidateStrip   func(d Drawable) //nolint:structcheck // used within this file
-	onInvalidateContent func(d Drawable)
-
 	parent   *Tabs //nolint:structcheck // used within this file
 	CloseTab func(index int)
 }
@@ -59,7 +56,6 @@ func (tabs *Tabs) Add(content Drawable, name string, uiConf *config.UIConfig) *T
 	}
 	tabs.tabs = append(tabs.tabs, tab)
 	tabs.selectPriv(len(tabs.tabs) - 1)
-	content.OnInvalidate(tabs.invalidateChild)
 	return tab
 }
 
@@ -73,18 +69,6 @@ func (tabs *Tabs) Names() []string {
 	return names
 }
 
-func (tabs *Tabs) invalidateChild(d Drawable) {
-	if tabs.curIndex >= len(tabs.tabs) {
-		return
-	}
-
-	if tabs.tabs[tabs.curIndex].Content == d {
-		if tabs.onInvalidateContent != nil {
-			tabs.onInvalidateContent(tabs.TabContent)
-		}
-	}
-}
-
 func (tabs *Tabs) Remove(content Drawable) {
 	tabs.m.Lock()
 	defer tabs.m.Unlock()
@@ -133,8 +117,7 @@ func (tabs *Tabs) Replace(contentSrc Drawable, contentTarget Drawable, name stri
 			break
 		}
 	}
-	tabs.TabStrip.Invalidate()
-	contentTarget.OnInvalidate(tabs.invalidateChild)
+	Invalidate()
 }
 
 func (tabs *Tabs) Get(index int) *Tab {
@@ -172,8 +155,7 @@ func (tabs *Tabs) selectPriv(index int) bool {
 			tabs.pushHistory(tabs.curIndex)
 		}
 		tabs.curIndex = index
-		tabs.TabStrip.Invalidate()
-		tabs.TabContent.Invalidate()
+		Invalidate()
 	}
 	return true
 }
@@ -246,7 +228,7 @@ func (tabs *Tabs) moveTabPriv(to int, relative bool) {
 
 	tabs.tabs[to] = tab
 	tabs.curIndex = to
-	tabs.TabStrip.Invalidate()
+	Invalidate()
 }
 
 func (tabs *Tabs) PinTab() {
@@ -384,9 +366,7 @@ func (strip *TabStrip) Draw(ctx *Context) {
 }
 
 func (strip *TabStrip) Invalidate() {
-	if strip.onInvalidateStrip != nil {
-		strip.onInvalidateStrip(strip)
-	}
+	Invalidate()
 }
 
 func (strip *TabStrip) MouseEvent(localX int, localY int, event tcell.Event) {
@@ -440,10 +420,6 @@ func (strip *TabStrip) MouseEvent(localX int, localY int, event tcell.Event) {
 	}
 }
 
-func (strip *TabStrip) OnInvalidate(onInvalidate func(d Drawable)) {
-	strip.onInvalidateStrip = onInvalidate
-}
-
 func (strip *TabStrip) clicked(mouseX int, mouseY int) (int, bool) {
 	x := 0
 	for i, tab := range strip.tabs {
@@ -490,13 +466,5 @@ func (content *TabContent) MouseEvent(localX int, localY int, event tcell.Event)
 }
 
 func (content *TabContent) Invalidate() {
-	if content.onInvalidateContent != nil {
-		content.onInvalidateContent(content)
-	}
-	tab := content.tabs[content.curIndex]
-	tab.Content.Invalidate()
-}
-
-func (content *TabContent) OnInvalidate(onInvalidate func(d Drawable)) {
-	content.onInvalidateContent = onInvalidate
+	Invalidate()
 }
diff --git a/lib/ui/text.go b/lib/ui/text.go
index ffae1938..def61a0a 100644
--- a/lib/ui/text.go
+++ b/lib/ui/text.go
@@ -12,7 +12,6 @@ const (
 )
 
 type Text struct {
-	Invalidatable
 	text     string
 	strategy uint
 	style    tcell.Style
@@ -51,5 +50,5 @@ func (t *Text) Draw(ctx *Context) {
 }
 
 func (t *Text) Invalidate() {
-	t.DoInvalidate(t)
+	Invalidate()
 }
diff --git a/lib/ui/textinput.go b/lib/ui/textinput.go
index d99871ce..2a8b7c73 100644
--- a/lib/ui/textinput.go
+++ b/lib/ui/textinput.go
@@ -17,7 +17,6 @@ import (
 // TODO: scrolling
 
 type TextInput struct {
-	Invalidatable
 	sync.Mutex
 	cells             int
 	ctx               *Context
@@ -90,7 +89,7 @@ func (ti *TextInput) Set(value string) *TextInput {
 }
 
 func (ti *TextInput) Invalidate() {
-	ti.DoInvalidate(ti)
+	Invalidate()
 }
 
 func (ti *TextInput) Draw(ctx *Context) {
@@ -530,5 +529,3 @@ func findStem(words []string) string {
 func (c *completions) Focus(_ bool) {}
 
 func (c *completions) Invalidate() {}
-
-func (c *completions) OnInvalidate(_ func(Drawable)) {}
diff --git a/lib/ui/ui.go b/lib/ui/ui.go
index 073684cc..313f90d8 100644
--- a/lib/ui/ui.go
+++ b/lib/ui/ui.go
@@ -122,7 +122,7 @@ func (state *UI) HandleEvent(event tcell.Event) {
 		state.screen.Clear()
 		width, height := event.Size()
 		state.ctx = NewContext(width, height, state.screen, state.onPopover)
-		state.Content.Invalidate()
+		Invalidate()
 	}
 	// if we have a popover, and it can handle the event, it does so
 	if state.popover == nil || !state.popover.Event(event) {
diff --git a/widgets/account-wizard.go b/widgets/account-wizard.go
index 4856c608..b6e0a5e4 100644
--- a/widgets/account-wizard.go
+++ b/widgets/account-wizard.go
@@ -40,7 +40,6 @@ const (
 )
 
 type AccountWizard struct {
-	ui.Invalidatable
 	aerc      *Aerc
 	conf      *config.AercConfig
 	step      int
@@ -224,9 +223,6 @@ func NewAccountWizard(conf *config.AercConfig, aerc *Aerc) *AccountWizard {
 	wizard.basics = []ui.Interactive{
 		wizard.accountName, wizard.fullName, wizard.email, selector,
 	}
-	basics.OnInvalidate(func(_ ui.Drawable) {
-		wizard.Invalidate()
-	})
 
 	incoming := ui.NewGrid().Rows([]ui.GridSpec{
 		{Strategy: ui.SIZE_EXACT, Size: ui.Const(3)}, // Introduction
@@ -303,9 +299,6 @@ func NewAccountWizard(conf *config.AercConfig, aerc *Aerc) *AccountWizard {
 		wizard.imapUsername, wizard.imapPassword, wizard.imapServer,
 		imapMode, selector,
 	}
-	incoming.OnInvalidate(func(_ ui.Drawable) {
-		wizard.Invalidate()
-	})
 
 	outgoing := ui.NewGrid().Rows([]ui.GridSpec{
 		{Strategy: ui.SIZE_EXACT, Size: ui.Const(3)}, // Introduction
@@ -399,9 +392,6 @@ func NewAccountWizard(conf *config.AercConfig, aerc *Aerc) *AccountWizard {
 		wizard.smtpUsername, wizard.smtpPassword, wizard.smtpServer,
 		smtpMode, copySent, selector,
 	}
-	outgoing.OnInvalidate(func(_ ui.Drawable) {
-		wizard.Invalidate()
-	})
 
 	complete := ui.NewGrid().Rows([]ui.GridSpec{
 		{Strategy: ui.SIZE_EXACT, Size: ui.Const(7)},  // Introduction
@@ -431,9 +421,6 @@ func NewAccountWizard(conf *config.AercConfig, aerc *Aerc) *AccountWizard {
 	})
 	complete.AddChild(selector).At(1, 0)
 	wizard.complete = []ui.Interactive{selector}
-	complete.OnInvalidate(func(_ ui.Drawable) {
-		wizard.Invalidate()
-	})
 
 	wizard.steps = []*ui.Grid{basics, incoming, outgoing, complete}
 	return wizard
@@ -665,7 +652,7 @@ func (wizard *AccountWizard) smtpUri() url.URL {
 }
 
 func (wizard *AccountWizard) Invalidate() {
-	wizard.DoInvalidate(wizard)
+	ui.Invalidate()
 }
 
 func (wizard *AccountWizard) Draw(ctx *ui.Context) {
diff --git a/widgets/account.go b/widgets/account.go
index 93a75973..cafc29de 100644
--- a/widgets/account.go
+++ b/widgets/account.go
@@ -143,14 +143,8 @@ func (acct *AccountView) Name() string {
 	return acct.acct.Name
 }
 
-func (acct *AccountView) OnInvalidate(onInvalidate func(d ui.Drawable)) {
-	acct.grid.OnInvalidate(func(_ ui.Drawable) {
-		onInvalidate(acct)
-	})
-}
-
 func (acct *AccountView) Invalidate() {
-	acct.grid.Invalidate()
+	ui.Invalidate()
 }
 
 func (acct *AccountView) Draw(ctx *ui.Context) {
diff --git a/widgets/aerc.go b/widgets/aerc.go
index b396cf5e..56972771 100644
--- a/widgets/aerc.go
+++ b/widgets/aerc.go
@@ -152,14 +152,8 @@ func (aerc *Aerc) HandleMessage(msg types.WorkerMessage) {
 	}
 }
 
-func (aerc *Aerc) OnInvalidate(onInvalidate func(d ui.Drawable)) {
-	aerc.grid.OnInvalidate(func(_ ui.Drawable) {
-		onInvalidate(aerc)
-	})
-}
-
 func (aerc *Aerc) Invalidate() {
-	aerc.grid.Invalidate()
+	ui.Invalidate()
 }
 
 func (aerc *Aerc) Focus(focus bool) {
@@ -304,7 +298,7 @@ func (aerc *Aerc) Event(event tcell.Event) bool {
 			Key:       event.Key(),
 			Rune:      event.Rune(),
 		})
-		aerc.statusline.Invalidate()
+		ui.Invalidate()
 		bindings := aerc.getBindings()
 		incomplete := false
 		result, strokes := bindings.GetBinding(aerc.pendingKeys)
@@ -724,7 +718,7 @@ func (aerc *Aerc) Mailto(addr *url.URL) error {
 		} else {
 			tab.Name = subject
 		}
-		tab.Content.Invalidate()
+		ui.Invalidate()
 	})
 	return nil
 }
@@ -775,9 +769,6 @@ func (aerc *Aerc) CloseBackends() error {
 
 func (aerc *Aerc) AddDialog(d ui.DrawableInteractive) {
 	aerc.dialog = d
-	aerc.dialog.OnInvalidate(func(_ ui.Drawable) {
-		aerc.Invalidate()
-	})
 	aerc.Invalidate()
 }
 
diff --git a/widgets/authinfo.go b/widgets/authinfo.go
index a57d8a13..2b406a7a 100644
--- a/widgets/authinfo.go
+++ b/widgets/authinfo.go
@@ -11,7 +11,6 @@ import (
 )
 
 type AuthInfo struct {
-	ui.Invalidatable
 	authdetails *auth.Details
 	showInfo    bool
 	uiConfig    *config.UIConfig
@@ -85,5 +84,5 @@ func (a *AuthInfo) Draw(ctx *ui.Context) {
 }
 
 func (a *AuthInfo) Invalidate() {
-	a.DoInvalidate(a)
+	ui.Invalidate()
 }
diff --git a/widgets/compose.go b/widgets/compose.go
index 9b8b30cb..06452230 100644
--- a/widgets/compose.go
+++ b/widgets/compose.go
@@ -127,7 +127,6 @@ func (c *Composer) SwitchAccount(newAcct *AccountView) error {
 		editor.loadValue()
 	}
 	c.Invalidate()
-	c.aerc.Invalidate()
 	logging.Infof("account sucessfully switched")
 	return nil
 }
@@ -567,13 +566,7 @@ func (c *Composer) Draw(ctx *ui.Context) {
 }
 
 func (c *Composer) Invalidate() {
-	c.grid.Invalidate()
-}
-
-func (c *Composer) OnInvalidate(fn func(d ui.Drawable)) {
-	c.grid.OnInvalidate(func(_ ui.Drawable) {
-		fn(c)
-	})
+	ui.Invalidate()
 }
 
 func (c *Composer) Close() {
@@ -1107,7 +1100,7 @@ func extractHumanHeaderValue(key string, h *mail.Header) string {
 // decoding issues are ignored and return their raw values
 func (he *headerEditor) loadValue() {
 	he.input.Set(extractHumanHeaderValue(he.name, he.header))
-	he.input.Invalidate()
+	ui.Invalidate()
 }
 
 // storeValue writes the current state back to the underlying header.
@@ -1159,13 +1152,7 @@ func (he *headerEditor) MouseEvent(localX int, localY int, event tcell.Event) {
 }
 
 func (he *headerEditor) Invalidate() {
-	he.input.Invalidate()
-}
-
-func (he *headerEditor) OnInvalidate(fn func(ui.Drawable)) {
-	he.input.OnInvalidate(func(_ ui.Drawable) {
-		fn(he)
-	})
+	ui.Invalidate()
 }
 
 func (he *headerEditor) Focus(focused bool) {
@@ -1301,13 +1288,7 @@ func newReviewMessage(composer *Composer, err error) *reviewMessage {
 }
 
 func (rm *reviewMessage) Invalidate() {
-	rm.grid.Invalidate()
-}
-
-func (rm *reviewMessage) OnInvalidate(fn func(ui.Drawable)) {
-	rm.grid.OnInvalidate(func(_ ui.Drawable) {
-		fn(rm)
-	})
+	ui.Invalidate()
 }
 
 func (rm *reviewMessage) Draw(ctx *ui.Context) {
@@ -1344,13 +1325,7 @@ func (cs *cryptoStatus) Draw(ctx *ui.Context) {
 }
 
 func (cs *cryptoStatus) Invalidate() {
-	cs.status.Invalidate()
-}
-
-func (cs *cryptoStatus) OnInvalidate(fn func(ui.Drawable)) {
-	cs.status.OnInvalidate(func(_ ui.Drawable) {
-		fn(cs)
-	})
+	ui.Invalidate()
 }
 
 func (c *Composer) checkEncryptionKeys(_ string) bool {
diff --git a/widgets/dirlist.go b/widgets/dirlist.go
index 0f86a081..70550394 100644
--- a/widgets/dirlist.go
+++ b/widgets/dirlist.go
@@ -48,7 +48,6 @@ type DirectoryLister interface {
 }
 
 type DirectoryList struct {
-	ui.Invalidatable
 	sync.Mutex
 	Scrollable
 	aercConf         *config.AercConfig
@@ -199,7 +198,7 @@ func (dirlist *DirectoryList) Selected() string {
 }
 
 func (dirlist *DirectoryList) Invalidate() {
-	dirlist.DoInvalidate(dirlist)
+	ui.Invalidate()
 }
 
 func (dirlist *DirectoryList) getDirString(name string, width int, recentUnseen func() string) string {
diff --git a/widgets/exline.go b/widgets/exline.go
index 8d3c7ca6..789ccde8 100644
--- a/widgets/exline.go
+++ b/widgets/exline.go
@@ -9,7 +9,6 @@ import (
 )
 
 type ExLine struct {
-	ui.Invalidatable
 	commit      func(cmd string)
 	finish      func()
 	tabcomplete func(cmd string) ([]string, string)
@@ -34,9 +33,6 @@ func NewExLine(conf *config.AercConfig, cmd string, commit func(cmd string), fin
 		input:       input,
 		conf:        conf,
 	}
-	input.OnInvalidate(func(d ui.Drawable) {
-		exline.Invalidate()
-	})
 	return exline
 }
 
@@ -57,14 +53,11 @@ func NewPrompt(conf *config.AercConfig, prompt string, commit func(text string),
 		cmdHistory:  &nullHistory{input: input},
 		input:       input,
 	}
-	input.OnInvalidate(func(d ui.Drawable) {
-		exline.Invalidate()
-	})
 	return exline
 }
 
 func (ex *ExLine) Invalidate() {
-	ex.DoInvalidate(ex)
+	ui.Invalidate()
 }
 
 func (ex *ExLine) Draw(ctx *ui.Context) {
diff --git a/widgets/getpasswd.go b/widgets/getpasswd.go
index e6de75e1..70a2648d 100644
--- a/widgets/getpasswd.go
+++ b/widgets/getpasswd.go
@@ -10,7 +10,6 @@ import (
 )
 
 type GetPasswd struct {
-	ui.Invalidatable
 	callback func(string, error)
 	title    string
 	prompt   string
@@ -28,9 +27,6 @@ func NewGetPasswd(title string, prompt string, conf *config.AercConfig,
 		conf:     conf,
 		input:    ui.NewTextInput("", &conf.Ui).Password(true).Prompt("Password: "),
 	}
-	getpasswd.input.OnInvalidate(func(_ ui.Drawable) {
-		getpasswd.Invalidate()
-	})
 	getpasswd.input.Focus(true)
 	return getpasswd
 }
@@ -47,7 +43,7 @@ func (gp *GetPasswd) Draw(ctx *ui.Context) {
 }
 
 func (gp *GetPasswd) Invalidate() {
-	gp.DoInvalidate(gp)
+	ui.Invalidate()
 }
 
 func (gp *GetPasswd) Event(event tcell.Event) bool {
diff --git a/widgets/listbox.go b/widgets/listbox.go
index 2723ae37..d1f1b252 100644
--- a/widgets/listbox.go
+++ b/widgets/listbox.go
@@ -13,7 +13,6 @@ import (
 
 type ListBox struct {
 	Scrollable
-	ui.Invalidatable
 	title       string
 	lines       []string
 	selected    string
@@ -186,7 +185,7 @@ func (lb *ListBox) drawScrollbar(ctx *ui.Context) {
 }
 
 func (lb *ListBox) Invalidate() {
-	lb.DoInvalidate(lb)
+	ui.Invalidate()
 }
 
 func (lb *ListBox) Event(event tcell.Event) bool {
diff --git a/widgets/msglist.go b/widgets/msglist.go
index 74308ccb..7857a3d7 100644
--- a/widgets/msglist.go
+++ b/widgets/msglist.go
@@ -19,7 +19,6 @@ import (
 )
 
 type MessageList struct {
-	ui.Invalidatable
 	Scrollable
 	conf          *config.AercConfig
 	height        int
@@ -37,16 +36,13 @@ func NewMessageList(conf *config.AercConfig, aerc *Aerc) *MessageList {
 		isInitalizing: true,
 		aerc:          aerc,
 	}
-	ml.spinner.OnInvalidate(func(_ ui.Drawable) {
-		ml.Invalidate()
-	})
 	// TODO: stop spinner, probably
 	ml.spinner.Start()
 	return ml
 }
 
 func (ml *MessageList) Invalidate() {
-	ml.DoInvalidate(ml)
+	ui.Invalidate()
 }
 
 func (ml *MessageList) Draw(ctx *ui.Context) {
diff --git a/widgets/msgviewer.go b/widgets/msgviewer.go
index 126bf85b..8904758d 100644
--- a/widgets/msgviewer.go
+++ b/widgets/msgviewer.go
@@ -30,7 +30,6 @@ var ansi = regexp.MustCompile("\x1B\\[[0-?]*[ -/]*[@-~]")
 var _ ProvidesMessages = (*MessageViewer)(nil)
 
 type MessageViewer struct {
-	ui.Invalidatable
 	acct     *AccountView
 	conf     *config.AercConfig
 	err      error
@@ -41,7 +40,6 @@ type MessageViewer struct {
 }
 
 type PartSwitcher struct {
-	ui.Invalidatable
 	parts          []*PartViewer
 	selected       int
 	showHeaders    bool
@@ -219,9 +217,6 @@ func createSwitcher(acct *AccountView, switcher *PartSwitcher,
 			return err
 		}
 		switcher.parts = []*PartViewer{pv}
-		pv.OnInvalidate(func(_ ui.Drawable) {
-			switcher.Invalidate()
-		})
 	} else {
 		switcher.parts, err = enumerateParts(acct, conf, msg,
 			msg.BodyStructure(), []int{})
@@ -231,9 +226,6 @@ func createSwitcher(acct *AccountView, switcher *PartSwitcher,
 		selectedPriority := -1
 		logging.Infof("Selecting best message from %v", conf.Viewer.Alternatives)
 		for i, pv := range switcher.parts {
-			pv.OnInvalidate(func(_ ui.Drawable) {
-				switcher.Invalidate()
-			})
 			// Switch to user's preferred mimetype
 			if switcher.selected == -1 && pv.part.MIMEType != "multipart" {
 				switcher.selected = i
@@ -273,13 +265,7 @@ func (mv *MessageViewer) MouseEvent(localX int, localY int, event tcell.Event) {
 }
 
 func (mv *MessageViewer) Invalidate() {
-	mv.grid.Invalidate()
-}
-
-func (mv *MessageViewer) OnInvalidate(fn func(d ui.Drawable)) {
-	mv.grid.OnInvalidate(func(_ ui.Drawable) {
-		fn(mv)
-	})
+	ui.Invalidate()
 }
 
 func (mv *MessageViewer) Store() *lib.MessageStore {
@@ -408,7 +394,7 @@ func (mv *MessageViewer) UpdateScreen() {
 }
 
 func (ps *PartSwitcher) Invalidate() {
-	ps.DoInvalidate(ps)
+	ui.Invalidate()
 }
 
 func (ps *PartSwitcher) Focus(focus bool) {
@@ -521,7 +507,6 @@ func (mv *MessageViewer) Focus(focus bool) {
 }
 
 type PartViewer struct {
-	ui.Invalidatable
 	conf        *config.AercConfig
 	acctConfig  *config.AccountConfig
 	err         error
@@ -630,9 +615,6 @@ func NewPartViewer(acct *AccountView, conf *config.AercConfig,
 		term.OnStart = func() {
 			pv.attemptCopy()
 		}
-		term.OnInvalidate(func(_ ui.Drawable) {
-			pv.Invalidate()
-		})
 	}
 
 	return pv, nil
@@ -644,9 +626,7 @@ func (pv *PartViewer) SetSource(reader io.Reader) {
 }
 
 func (pv *PartViewer) UpdateScreen() {
-	if pv.term != nil {
-		pv.term.Invalidate()
-	}
+	pv.Invalidate()
 }
 
 func (pv *PartViewer) attemptCopy() {
@@ -840,7 +820,7 @@ What would you like to do?`, pv.part.MIMEType, pv.part.MIMESubType)
 }
 
 func (pv *PartViewer) Invalidate() {
-	pv.DoInvalidate(pv)
+	ui.Invalidate()
 }
 
 func (pv *PartViewer) Draw(ctx *ui.Context) {
@@ -878,7 +858,6 @@ func (pv *PartViewer) Event(event tcell.Event) bool {
 }
 
 type HeaderView struct {
-	ui.Invalidatable
 	conf       *config.AercConfig
 	Name       string
 	Value      string
@@ -913,5 +892,5 @@ func (hv *HeaderView) Draw(ctx *ui.Context) {
 }
 
 func (hv *HeaderView) Invalidate() {
-	hv.DoInvalidate(hv)
+	ui.Invalidate()
 }
diff --git a/widgets/pgpinfo.go b/widgets/pgpinfo.go
index ee2a0266..c64bcfdf 100644
--- a/widgets/pgpinfo.go
+++ b/widgets/pgpinfo.go
@@ -12,7 +12,6 @@ import (
 )
 
 type PGPInfo struct {
-	ui.Invalidatable
 	details  *models.MessageDetails
 	uiConfig *config.UIConfig
 }
@@ -95,5 +94,5 @@ func (p *PGPInfo) Draw(ctx *ui.Context) {
 }
 
 func (p *PGPInfo) Invalidate() {
-	p.DoInvalidate(p)
+	ui.Invalidate()
 }
diff --git a/widgets/selector.go b/widgets/selector.go
index 8a1a1623..66dfb8b5 100644
--- a/widgets/selector.go
+++ b/widgets/selector.go
@@ -11,7 +11,6 @@ import (
 )
 
 type Selector struct {
-	ui.Invalidatable
 	chooser  bool
 	focused  bool
 	focus    int
@@ -36,7 +35,7 @@ func (sel *Selector) Chooser(chooser bool) *Selector {
 }
 
 func (sel *Selector) Invalidate() {
-	sel.DoInvalidate(sel)
+	ui.Invalidate()
 }
 
 func (sel *Selector) Draw(ctx *ui.Context) {
@@ -166,7 +165,6 @@ func (sel *Selector) Event(event tcell.Event) bool {
 var ErrNoOptionSelected = fmt.Errorf("no option selected")
 
 type SelectorDialog struct {
-	ui.Invalidatable
 	callback func(string, error)
 	title    string
 	prompt   string
@@ -184,9 +182,6 @@ func NewSelectorDialog(title string, prompt string, options []string, focus int,
 		uiConfig: uiConfig,
 		selector: NewSelector(options, focus, uiConfig).Chooser(true),
 	}
-	sd.selector.OnInvalidate(func(_ ui.Drawable) {
-		sd.Invalidate()
-	})
 	sd.selector.Focus(true)
 	return sd
 }
@@ -203,7 +198,7 @@ func (gp *SelectorDialog) Draw(ctx *ui.Context) {
 }
 
 func (gp *SelectorDialog) Invalidate() {
-	gp.DoInvalidate(gp)
+	ui.Invalidate()
 }
 
 func (gp *SelectorDialog) Event(event tcell.Event) bool {
diff --git a/widgets/spinner.go b/widgets/spinner.go
index 0e7c9005..34c3d82e 100644
--- a/widgets/spinner.go
+++ b/widgets/spinner.go
@@ -13,7 +13,6 @@ import (
 )
 
 type Spinner struct {
-	ui.Invalidatable
 	frame  int64 // access via atomic
 	frames []string
 	stop   chan struct{}
@@ -82,5 +81,5 @@ func (s *Spinner) Draw(ctx *ui.Context) {
 }
 
 func (s *Spinner) Invalidate() {
-	s.DoInvalidate(s)
+	ui.Invalidate()
 }
diff --git a/widgets/status.go b/widgets/status.go
index c5559d38..d8d0328a 100644
--- a/widgets/status.go
+++ b/widgets/status.go
@@ -12,7 +12,6 @@ import (
 )
 
 type StatusLine struct {
-	ui.Invalidatable
 	stack    []*StatusMessage
 	fallback StatusMessage
 	aerc     *Aerc
@@ -33,7 +32,7 @@ func NewStatusLine(uiConfig config.UIConfig) *StatusLine {
 }
 
 func (status *StatusLine) Invalidate() {
-	status.DoInvalidate(status)
+	ui.Invalidate()
 }
 
 func (status *StatusLine) Draw(ctx *ui.Context) {
diff --git a/widgets/terminal.go b/widgets/terminal.go
index 39cd9f24..e0a76ca8 100644
--- a/widgets/terminal.go
+++ b/widgets/terminal.go
@@ -13,7 +13,6 @@ import (
 )
 
 type Terminal struct {
-	ui.Invalidatable
 	closed      bool
 	cmd         *exec.Cmd
 	ctx         *ui.Context
@@ -71,7 +70,7 @@ func (term *Terminal) Destroy() {
 }
 
 func (term *Terminal) Invalidate() {
-	term.DoInvalidate(term)
+	ui.Invalidate()
 }
 
 func (term *Terminal) Draw(ctx *ui.Context) {