Revert "Add abstract list, update dirlist accordingly"

This reverts commit 3157897c1a20e5638feaf56e753b7886bc4ba267.

3 files changed, 26 insertions, 156 deletions

diff --git a/lib/ui/grid.go b/lib/ui/grid.go
index 5fe6ab2..3c375ee 100644
--- a/lib/ui/grid.go
+++ b/lib/ui/grid.go
@@ -5,7 +5,6 @@ import (
 	"math"
 )
 
-// A container which arranges its children on a grid.
 type Grid struct {
 	rows         []GridSpec
 	rowLayout    []gridLayout
diff --git a/lib/ui/list.go b/lib/ui/list.go
deleted file mode 100644
index 58f304f..0000000
--- a/lib/ui/list.go
+++ /dev/null
@@ -1,110 +0,0 @@
-package ui
-
-import (
-	"fmt"
-)
-
-// A container which arranges its children in a list.
-type List struct {
-	Items        []*ListItem
-	itemHeight   int
-	onInvalidate func(d Drawable)
-	selected     int
-}
-
-type ListItem struct {
-	Content Drawable
-	invalid bool
-}
-
-type SelectableDrawable interface {
-	Drawable
-	DrawWithSelected(ctx *Context, selected bool)
-}
-
-func NewList() *List {
-	return &List{itemHeight: 1, selected: -1}
-}
-
-func (list *List) OnInvalidate(onInvalidate func(d Drawable)) {
-	list.onInvalidate = onInvalidate
-}
-
-func (list *List) Invalidate() {
-	for _, item := range list.Items {
-		item.Content.Invalidate()
-	}
-	if list.onInvalidate != nil {
-		list.onInvalidate(list)
-	}
-}
-
-func (list *List) Draw(ctx *Context) {
-	for i, item := range list.Items {
-		if !item.invalid {
-			continue
-		}
-		subctx := ctx.Subcontext(0, i, ctx.Width(), list.itemHeight)
-		if content, ok := item.Content.(SelectableDrawable); ok {
-			content.DrawWithSelected(subctx, i == list.selected)
-		} else {
-			item.Content.Draw(subctx)
-		}
-	}
-}
-
-func (list *List) Add(child Drawable) {
-	list.Items = append(list.Items, &ListItem{Content: child, invalid: true})
-	child.OnInvalidate(list.childInvalidated)
-	list.Invalidate()
-}
-
-func (list *List) Remove(child Drawable) {
-	for i, item := range list.Items {
-		if item.Content == child {
-			list.Items = append(list.Items[:i], list.Items[i+1:]...)
-			child.OnInvalidate(nil)
-			list.Invalidate()
-			return
-		}
-	}
-	panic(fmt.Errorf("Attempted to remove unknown child"))
-}
-
-func (list *List) Set(items []Drawable) {
-	for _, item := range list.Items {
-		item.Content.OnInvalidate(nil)
-	}
-	list.Items = make([]*ListItem, len(items))
-	for i, item := range items {
-		list.Items[i] = &ListItem{Content: item, invalid: true}
-		item.OnInvalidate(list.childInvalidated)
-	}
-	list.Invalidate()
-}
-
-func (list *List) Select(index int) {
-	if index >= len(list.Items) || index < 0 {
-		panic(fmt.Errorf("Attempted to select unknown child"))
-	}
-	list.selected = index
-	list.Invalidate()
-}
-
-func (list *List) ItemHeight(height int) {
-	list.itemHeight = height
-	list.Invalidate()
-}
-
-func (list *List) childInvalidated(child Drawable) {
-	for _, item := range list.Items {
-		if item.Content == child {
-			item.invalid = true
-			if list.onInvalidate != nil {
-				list.onInvalidate(list)
-			}
-			return
-		}
-	}
-	panic(fmt.Errorf("Attempted to invalidate unknown child"))
-}
diff --git a/widgets/directories.go b/widgets/directories.go
index ff2f6f5..16b0e5a 100644
--- a/widgets/directories.go
+++ b/widgets/directories.go
@@ -3,7 +3,6 @@ package widgets
 import (
 	"log"
 	"sort"
-	"strings"
 
 	"github.com/gdamore/tcell"
 
@@ -14,7 +13,7 @@ import (
 
 type DirectoryList struct {
 	conf         *config.AccountConfig
-	dirs         *ui.List
+	dirs         []string
 	logger       *log.Logger
 	onInvalidate func(d ui.Drawable)
 	worker       *types.Worker
@@ -23,68 +22,50 @@ type DirectoryList struct {
 func NewDirectoryList(conf *config.AccountConfig,
 	logger *log.Logger, worker *types.Worker) *DirectoryList {
 
-	return &DirectoryList{
-		conf:   conf,
-		dirs:   ui.NewList(),
-		logger: logger,
-		worker: worker,
-	}
+	return &DirectoryList{conf: conf, logger: logger, worker: worker}
 }
 
 func (dirlist *DirectoryList) UpdateList() {
-	var dirs []ui.Drawable
+	var dirs []string
 	dirlist.worker.PostAction(
 		&types.ListDirectories{}, func(msg types.WorkerMessage) {
 
 			switch msg := msg.(type) {
 			case *types.Directory:
-				if len(dirlist.conf.Folders) > 1 {
-					idx := sort.SearchStrings(dirlist.conf.Folders, msg.Name)
-					if idx == len(dirlist.conf.Folders) ||
-						dirlist.conf.Folders[idx] != msg.Name {
-						break
-					}
-				}
-				dirs = append(dirs, directoryEntry(msg.Name))
+				dirs = append(dirs, msg.Name)
 			case *types.Done:
-				sort.Slice(dirs, func(_a, _b int) bool {
-					a, _ := dirs[_a].(directoryEntry)
-					b, _ := dirs[_b].(directoryEntry)
-					return strings.Compare(string(a), string(b)) > 0
-				})
-				dirlist.dirs.Set(dirs)
+				sort.Strings(dirs)
+				dirlist.dirs = dirs
+				dirlist.Invalidate()
 			}
 		})
 }
 
 func (dirlist *DirectoryList) OnInvalidate(onInvalidate func(d ui.Drawable)) {
-	dirlist.dirs.OnInvalidate(func(_ ui.Drawable) {
-		onInvalidate(dirlist)
-	})
+	dirlist.onInvalidate = onInvalidate
 }
 
 func (dirlist *DirectoryList) Invalidate() {
-	dirlist.dirs.Invalidate()
+	if dirlist.onInvalidate != nil {
+		dirlist.onInvalidate(dirlist)
+	}
 }
 
 func (dirlist *DirectoryList) Draw(ctx *ui.Context) {
-	dirlist.dirs.Draw(ctx)
-}
-
-type directoryEntry string
-
-func (d directoryEntry) OnInvalidate(_ func(_ ui.Drawable)) {
-}
-
-func (d directoryEntry) Invalidate() {
-}
-
-func (d directoryEntry) Draw(ctx *ui.Context) {
-	d.DrawWithSelected(ctx, false)
-}
-
-func (d directoryEntry) DrawWithSelected(ctx *ui.Context, selected bool) {
-	// TODO: distinguish the selected item
 	ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', tcell.StyleDefault)
-	ctx.Printf(0, 0, tcell.StyleDefault, "%s", d)
+	row := 0
+	for _, name := range dirlist.dirs {
+		if row >= ctx.Height() {
+			break
+		}
+		if len(dirlist.conf.Folders) > 1 {
+			idx := sort.SearchStrings(dirlist.conf.Folders, name)
+			if idx == len(dirlist.conf.Folders) ||
+				dirlist.conf.Folders[idx] != name {
+				continue
+			}
+		}
+		ctx.Printf(0, row, tcell.StyleDefault, "%s", name)
+		row++
+	}
 }