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ncdu: remove option ('d' key)

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delete files by pressing 'd' in the ncdu listing

GUI Improvements:
Boxes now have a border around them
Boxes can ask questions and allow the selection of options. The
selected option will be given to the UI.boxMenuHandler function.

Fixes #2571
This commit is contained in:
Henning Surmeier 2018-10-14 16:59:27 +02:00 committed by Nick Craig-Wood
parent 9486df0226
commit 04a0da1f92
1 changed files with 209 additions and 22 deletions
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231
cmd/ncdu/ncdu.go
View file

@ -13,6 +13,7 @@ import (
"github.com/ncw/rclone/cmd"
"github.com/ncw/rclone/cmd/ncdu/scan"
"github.com/ncw/rclone/fs"
"github.com/ncw/rclone/fs/operations"
termbox "github.com/nsf/termbox-go"
"github.com/pkg/errors"
"github.com/spf13/cobra"
@ -42,8 +43,11 @@ Here are the keys - press '?' to toggle the help on and off
` + strings.Join(helpText[1:], "\n ") + `
This an homage to the [ncdu tool](https://dev.yorhel.nl/ncdu) but for
rclone remotes. It is missing lots of features at the moment, most
importantly deleting files, but is useful as it stands.
rclone remotes. It is missing lots of features at the moment
but is useful as it stands.
Note that it might take some time to delete big files/folders. The
UI won't respond in the meantime since the deletion is done synchronously.
`,
Run: func(command *cobra.Command, args []string) {
cmd.CheckArgs(1, 1, command, args)
@ -63,6 +67,7 @@ var helpText = []string{
" c toggle counts",
" g toggle graph",
" n,s,C sort by name,size,count",
" d delete file/directory",
" ^L refresh screen",
" ? to toggle help on and off",
" q/ESC/c-C to quit",
@ -70,24 +75,27 @@ var helpText = []string{
// UI contains the state of the user interface
type UI struct {
f fs.Fs // fs being displayed
fsName string // human name of Fs
root *scan.Dir // root directory
d *scan.Dir // current directory being displayed
path string // path of current directory
showBox bool // whether to show a box
boxText []string // text to show in box
entries fs.DirEntries // entries of current directory
sortPerm []int // order to display entries in after sorting
invSortPerm []int // inverse order
dirListHeight int // height of listing
listing bool // whether listing is in progress
showGraph bool // toggle showing graph
showCounts bool // toggle showing counts
sortByName int8 // +1 for normal, 0 for off, -1 for reverse
sortBySize int8
sortByCount int8
dirPosMap map[string]dirPos // store for directory positions
f fs.Fs // fs being displayed
fsName string // human name of Fs
root *scan.Dir // root directory
d *scan.Dir // current directory being displayed
path string // path of current directory
showBox bool // whether to show a box
boxText []string // text to show in box
boxMenu []string // box menu options
boxMenuButton int
boxMenuHandler func(fs fs.Fs, path string, option int) (string, error)
entries fs.DirEntries // entries of current directory
sortPerm []int // order to display entries in after sorting
invSortPerm []int // inverse order
dirListHeight int // height of listing
listing bool // whether listing is in progress
showGraph bool // toggle showing graph
showCounts bool // toggle showing counts
sortByName int8 // +1 for normal, 0 for off, -1 for reverse
sortBySize int8
sortByCount int8
dirPosMap map[string]dirPos // store for directory positions
}
// Where we have got to in the directory listing
@ -130,6 +138,54 @@ func Linef(x, y, xmax int, fg, bg termbox.Attribute, spacer rune, format string,
Line(x, y, xmax, fg, bg, spacer, s)
}
// LineOptions Print line of selectable options
func LineOptions(x, y, xmax int, fg, bg termbox.Attribute, options []string, selected int) {
defaultBg := bg
defaultFg := fg
// Print left+right whitespace to center the options
xoffset := ((xmax - x) - lineOptionLength(options)) / 2
for j := x; j < x+xoffset; j++ {
termbox.SetCell(j, y, ' ', fg, bg)
}
for j := xmax - xoffset; j < xmax; j++ {
termbox.SetCell(j, y, ' ', fg, bg)
}
x += xoffset
for i, o := range options {
termbox.SetCell(x, y, ' ', fg, bg)
if i == selected {
bg = termbox.ColorBlack
fg = termbox.ColorWhite
}
termbox.SetCell(x+1, y, '<', fg, bg)
x += 2
// print option text
for _, c := range o {
termbox.SetCell(x, y, c, fg, bg)
x++
}
termbox.SetCell(x, y, '>', fg, bg)
bg = defaultBg
fg = defaultFg
termbox.SetCell(x+1, y, ' ', fg, bg)
x += 2
}
}
func lineOptionLength(o []string) int {
count := 0
for _, i := range o {
count += len(i)
}
return count + 4*len(o) // spacer and arrows <entry>
}
// Box the u.boxText onto the screen
func (u *UI) Box() {
w, h := termbox.Size()
@ -147,6 +203,15 @@ func (u *UI) Box() {
x := (w - boxWidth) / 2
y := (h - boxHeight) / 2
xmax := x + boxWidth
if len(u.boxMenu) != 0 {
count := lineOptionLength(u.boxMenu)
if x+boxWidth > x+count {
xmax = x + boxWidth
} else {
xmax = x + count
}
}
ymax := y + len(u.boxText)
// draw text
fg, bg := termbox.ColorRed, termbox.ColorWhite
@ -155,7 +220,43 @@ func (u *UI) Box() {
fg = termbox.ColorBlack
}
// FIXME draw a box around
if len(u.boxMenu) != 0 {
ymax++
LineOptions(x, ymax-1, xmax, fg, bg, u.boxMenu, u.boxMenuButton)
}
// draw top border
for i := y; i < ymax; i++ {
termbox.SetCell(x-1, i, '│', fg, bg)
termbox.SetCell(xmax, i, '│', fg, bg)
}
for j := x; j < xmax; j++ {
termbox.SetCell(j, y-1, '─', fg, bg)
termbox.SetCell(j, ymax, '─', fg, bg)
}
termbox.SetCell(x-1, y-1, '┌', fg, bg)
termbox.SetCell(xmax, y-1, '┐', fg, bg)
termbox.SetCell(x-1, ymax, '└', fg, bg)
termbox.SetCell(xmax, ymax, '┘', fg, bg)
}
func (u *UI) moveBox(to int) {
if len(u.boxMenu) == 0 {
return
}
if to > 0 { // move right
u.boxMenuButton++
} else { // move left
u.boxMenuButton--
}
if u.boxMenuButton >= len(u.boxMenu) {
u.boxMenuButton = len(u.boxMenu) - 1
} else if u.boxMenuButton < 0 {
u.boxMenuButton = 0
}
}
// find the biggest entry in the current listing
@ -314,6 +415,57 @@ func (u *UI) move(d int) {
u.dirPosMap[u.path] = dirPos
}
func (u *UI) removeEntry(pos int) {
u.d.Remove(pos)
u.setCurrentDir(u.d)
}
// delete the entry at the current position
func (u *UI) delete() {
dirPos := u.sortPerm[u.dirPosMap[u.path].entry]
entry := u.entries[dirPos]
file := false
d, _ := u.d.GetDir(dirPos)
if d == nil {
file = true
}
u.boxMenu = []string{"cancel", "confirm"}
if file {
u.boxMenuHandler = func(f fs.Fs, p string, o int) (string, error) {
if o != 1 {
return "Aborted!", nil
}
err := f.Rmdir(entry.String())
if err != nil {
return "", err
}
u.removeEntry(dirPos)
return "Successfully deleted file!", nil
}
u.popupBox([]string{
"Delete this file?",
u.fsName + entry.String()})
} else {
u.boxMenuHandler = func(f fs.Fs, p string, o int) (string, error) {
if o != 1 {
return "Aborted!", nil
}
err := operations.Purge(f, entry.String())
if err != nil {
return "", err
}
u.removeEntry(dirPos)
return "Successfully purged folder!", nil
}
u.popupBox([]string{
"Purge this directory?",
"ALL files in it will be deleted",
u.fsName + entry.String()})
}
}
// Sort by the configured sort method
type ncduSort struct {
sortPerm []int
@ -405,6 +557,25 @@ func (u *UI) enter() {
u.setCurrentDir(d)
}
// handles a box option that was selected
func (u *UI) handleBoxOption() {
msg, err := u.boxMenuHandler(u.f, u.path, u.boxMenuButton)
// reset
u.boxMenuButton = 0
u.boxMenu = []string{}
u.boxMenuHandler = nil
if err != nil {
u.popupBox([]string{
"error:",
err.Error(),
})
return
}
u.popupBox([]string{"Finished:", msg})
}
// up goes up to the parent directory
func (u *UI) up() {
if u.d == nil {
@ -524,8 +695,22 @@ outer:
case termbox.KeyPgup, '=', '+':
u.move(-u.dirListHeight)
case termbox.KeyArrowLeft, 'h':
if u.showBox {
u.moveBox(-1)
break
}
u.up()
case termbox.KeyArrowRight, 'l', termbox.KeyEnter:
case termbox.KeyEnter:
if len(u.boxMenu) > 0 {
u.handleBoxOption()
break
}
u.enter()
case termbox.KeyArrowRight, 'l':
if u.showBox {
u.moveBox(1)
break
}
u.enter()
case 'c':
u.showCounts = !u.showCounts
@ -537,6 +722,8 @@ outer:
u.toggleSort(&u.sortBySize)
case 'C':
u.toggleSort(&u.sortByCount)
case 'd':
u.delete()
case '?':
u.togglePopupBox(helpText)