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delete_job.go
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delete_job.go
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/**
* Copyright (C) 2015 Deepin Technology Co., Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
**/
package operations
import (
"strings"
"gir/gio-2.0"
)
// DeleteJob delete or trash files/directories.
type DeleteJob struct {
*CommonJob
files []*gio.File
trash bool
shouldConfirm bool
userCancel bool
}
const (
_DeleteJobSignalDeleting = "deleting"
_DeleteJobSignalTrashing = "trashing"
)
func (job *DeleteJob) emitDeleting(deletedFileURL string) {
job.Emit(_DeleteJobSignalDeleting, deletedFileURL)
}
func (job *DeleteJob) emitTrashing(trashingFile string) {
job.Emit(_DeleteJobSignalTrashing, trashingFile)
}
func (job *DeleteJob) ListenDeleting(fn func(string)) (func(), error) {
return job.ListenSignal(_DeleteJobSignalDeleting, fn)
}
func (job *DeleteJob) ListenTrashing(fn func(string)) (func(), error) {
return job.ListenSignal(_DeleteJobSignalTrashing, fn)
}
// TODO: function is huge.
func (job *DeleteJob) deleteDirectory(
dir *gio.File,
skippedFile *bool,
topLevel bool,
) {
localSkippedFile := false
skipError := job.shouldSkipDir(dir)
retry:
enumerator, enumerateErr := dir.EnumerateChildren(strings.Join(
[]string{
gio.FileAttributeStandardName,
gio.FileAttributeStandardSize,
}, ","),
gio.FileQueryInfoFlagsNofollowSymlinks,
job.cancellable,
)
if enumerator != nil {
var err error
for !job.isAborted() {
fileInfo, nextErr := enumerator.NextFile(job.cancellable)
err = nextErr
if fileInfo == nil {
break
}
child := dir.GetChild(fileInfo.GetName())
job.deleteFile(child, &localSkippedFile, false)
fileInfo.Unref()
child.Unref()
}
enumerator.Close(job.cancellable)
enumerator.Unref()
if !skipError && err != nil {
errCode := gio.IOErrorEnum(err.(gio.GError).Code)
if errCode != gio.IOErrorEnumCancelled {
primaryText := Tr("error while deleting")
secondaryText := ""
detailText := ""
if errCode == gio.IOErrorEnumPermissionDenied {
secondaryText = Tr("permission denied")
} else {
secondaryText = Tr("error")
detailText = err.Error()
}
response := job.uiDelegate.AskSkip(primaryText, secondaryText, detailText, UIFlagsMulti)
switch response.Code() {
case ResponseCancel:
job.Abort()
case ResponseSkip:
if response.ApplyToAll() {
localSkippedFile = true
}
default: // not reached
}
}
}
} else {
errCode := gio.IOErrorEnum(enumerateErr.(gio.GError).Code)
if errCode != gio.IOErrorEnumCancelled {
primaryText := Tr("error while deleting")
secondaryText := ""
detailText := ""
if errCode == gio.IOErrorEnumPermissionDenied {
secondaryText = Tr("permission denied")
} else {
secondaryText = Tr("error")
detailText = enumerateErr.Error()
}
response := job.uiDelegate.AskSkip(primaryText, secondaryText, detailText, UIFlagsMulti|UIFlagsRetry)
switch response.Code() {
case ResponseCancel:
job.Abort()
case ResponseSkip: // skip all, do nothing
if response.ApplyToAll() {
localSkippedFile = true
}
case ResponseRetry:
goto retry // avoid recursive
default: // not reached
}
}
}
if !job.isAborted() && !localSkippedFile {
deletedDirURL := dir.GetUri()
job.emitDeleting(deletedDirURL)
ok, err := dir.Delete(job.cancellable)
if ok {
job.setProcessedAmount(job.processedAmount[AmountUnitDirectories]+1, AmountUnitDirectories)
job.setProcessedAmount(job.processedAmount[AmountUnitSumOfFilesAndDirs]+1, AmountUnitSumOfFilesAndDirs)
return
}
if !job.skipAllError {
primaryText := Tr("error while deleting")
secondaryText := Tr("could not remove the folder")
detailText := err.Error()
response := job.uiDelegate.AskSkip(primaryText, secondaryText, detailText, UIFlagsMulti)
switch response.Code() {
case ResponseCancel:
job.Abort()
case ResponseSkip:
if response.ApplyToAll() {
job.skipAllError = true
}
localSkippedFile = true
}
}
}
if localSkippedFile {
*skippedFile = true
}
}
func (job *DeleteJob) deleteFile(file *gio.File, skippedFile *bool, topLevel bool) {
if job.shouldSkipFile(file) {
*skippedFile = true
return
}
deletedFileURL := file.GetUri()
job.emitDeleting(deletedFileURL)
ok, err := file.Delete(job.cancellable)
if ok {
job.setProcessedAmount(job.processedAmount[AmountUnitFiles]+1, AmountUnitFiles)
job.setProcessedAmount(job.processedAmount[AmountUnitSumOfFilesAndDirs]+1, AmountUnitSumOfFilesAndDirs)
return
}
errCode := gio.IOErrorEnum(err.(gio.GError).Code)
if errCode == gio.IOErrorEnumNotEmpty {
job.deleteDirectory(file, skippedFile, topLevel)
return
}
*skippedFile = true
if !job.skipAllError && errCode != gio.IOErrorEnumCancelled {
primaryText := Tr("")
secondaryText := Tr("")
detailText := Tr("")
response := job.uiDelegate.AskSkip(primaryText, secondaryText, detailText, UIFlagsMulti)
switch response.Code() {
case ResponseCancel:
job.Abort()
case ResponseSkip:
// skip do nothing
if response.ApplyToAll() {
job.skipAllError = true
}
default: // not reached
}
}
}
func (job *DeleteJob) deleteFiles(files []*gio.File) int {
nFilesSkipped := 0
if job.isAborted() {
return nFilesSkipped
}
job.op = OpKindDelete
// all files that cannot be trashed sometimes will be deleted.
if !job.trash {
job.scanSources(files, true)
}
if job.isAborted() {
return nFilesSkipped
}
for _, file := range files {
skippedFile := false
job.deleteFile(file, &skippedFile, true)
if skippedFile {
nFilesSkipped++
job.skippedAmount[AmountUnitSumOfFilesAndDirs]++
job.setProcessedAmount(job.processedAmount[AmountUnitSumOfFilesAndDirs]+1, AmountUnitSumOfFilesAndDirs)
}
}
return nFilesSkipped
}
type _TrashState int
const (
_TrashStateTrashed _TrashState = iota
_TrashStateRetry
_TrashStateSkip
_TrashStateDelete
_TrashStateCancel
)
func (job *DeleteJob) trashFile(file *gio.File) _TrashState {
state := _TrashStateTrashed
ok, err := file.Trash(job.cancellable)
if ok {
return state
}
skip := false
if job.skipAllError {
state = _TrashStateSkip
skip = true
}
if job.deleteAll {
state = _TrashStateDelete
skip = true
}
if skip {
return state
}
primaryText := Tr("trash failed, delete???")
secondaryText := ""
detailText := ""
errCode := gio.IOErrorEnum(err.(gio.GError).Code)
if errCode == gio.IOErrorEnumNotSupported {
detailText = err.Error()
} else if !file.IsNative() {
secondaryText = Tr("")
}
response := job.uiDelegate.AskDelete(primaryText, secondaryText, detailText, UIFlagsMulti|UIFlagsRetry)
switch response.Code() {
case ResponseCancel:
state = _TrashStateCancel
job.userCancel = true
job.Abort()
case ResponseSkip:
state = _TrashStateSkip
if response.ApplyToAll() {
job.skipAllError = true
}
case ResponseDelete:
state = _TrashStateDelete
if response.ApplyToAll() {
job.deleteAll = true
}
case ResponseRetry:
state = _TrashStateRetry
default:
state = _TrashStateSkip
}
return state
}
func (job *DeleteJob) trashFiles(files []*gio.File) int {
nFilesSkipped := 0
if job.isAborted() {
return nFilesSkipped
}
totalFiles := len(files)
job.totalAmount[AmountUnitSumOfFilesAndDirs] = int64(totalFiles)
toDelete := []*gio.File{}
for _, file := range files {
retry:
job.emitTrashing(file.GetUri())
state := job.trashFile(file)
if state != 0 {
totalFiles--
switch state {
case _TrashStateRetry:
goto retry
case _TrashStateSkip:
job.skippedAmount[AmountUnitSumOfFilesAndDirs]++
job.setProcessedAmount(job.processedAmount[AmountUnitSumOfFilesAndDirs]+1, AmountUnitSumOfFilesAndDirs)
case _TrashStateDelete:
toDelete = append(toDelete, file)
case _TrashStateCancel:
// do nothing
}
continue
}
// files and directories has no difference on trashing job.
job.setProcessedAmount(job.processedAmount[AmountUnitSumOfFilesAndDirs]+1, AmountUnitSumOfFilesAndDirs)
continue
}
if len(toDelete) != 0 {
job.deleteFiles(toDelete)
}
return nFilesSkipped
}
func (job *DeleteJob) canDeleteFilesWithoutConfirm(files []*gio.File) bool {
for _, file := range files {
if !job.canDeleteWithoutConfirm(file) {
return false
}
}
return true
}
func (job *DeleteJob) canDeleteWithoutConfirm(file *gio.File) bool {
return file.HasUriScheme("burn") ||
file.HasUriScheme("recent") ||
file.HasUriScheme("x-nautilus-desktop")
}
func (job *DeleteJob) confirmDeleteFromTrash(files []*gio.File) bool {
if !job.shouldConfirm {
return true
}
fileNum := uint64(len(files))
if fileNum == 0 {
panic("file should be greater than 0")
}
primaryText := NTr("permanently delete from trash??", "", int(fileNum))
secondaryText := Tr("")
detailText := Tr("")
response := job.uiDelegate.AskDeleteConfirmation(
primaryText,
secondaryText,
detailText,
)
return response
}
func (job *DeleteJob) confirmDeleteDirectly(files []*gio.File) bool {
if !job.shouldConfirm {
return true
}
if job.canDeleteFilesWithoutConfirm(files) {
return true
}
fileNum := uint64(len(files))
// TODO: doc
primaryText := NTr("delete???", "", int(fileNum))
secondaryText := Tr("")
detailText := Tr("")
response := job.uiDelegate.AskDeleteConfirmation(
primaryText,
secondaryText,
detailText,
)
return response
}
func (job *DeleteJob) init(files []*gio.File, uiDelegate IUIDelegate) {
job.CommonJob = newCommon(uiDelegate)
job.RegisterMonitor(_DeleteJobSignalTrashing)
job.RegisterMonitor(_DeleteJobSignalDeleting)
job.files = files
job.userCancel = false
job.sumFileAndDir = true
// TODO:
// if job.trash {
// // inhibit power manager for trashing
// } else {
// // inhibit power manager for deleting
// }
}
func (job *DeleteJob) finalize() {
for _, file := range job.files {
file.Unref()
}
job.CommonJob.finalize()
}
// Execute the delete job to delete files/directories.
func (job *DeleteJob) Execute() {
defer finishJob(job)
toTrashFiles := []*gio.File{}
toDeleteFiles := []*gio.File{}
confirmed := true
skippedFileNum := 0
mustConfirmDeleteInTrash := false
mustConfirmDelete := false
for _, file := range job.files {
if job.trash && file.HasUriScheme("trash") {
mustConfirmDeleteInTrash = true
toDeleteFiles = append(toDeleteFiles, file)
} else if job.canDeleteWithoutConfirm(file) {
toDeleteFiles = append(toDeleteFiles, file)
} else {
if job.trash {
toTrashFiles = append(toTrashFiles, file)
} else {
mustConfirmDelete = true
toDeleteFiles = append(toDeleteFiles, file)
}
}
}
if len(toDeleteFiles) != 0 {
confirmed = true
if mustConfirmDeleteInTrash {
confirmed = job.confirmDeleteFromTrash(toDeleteFiles)
} else if mustConfirmDelete {
confirmed = job.confirmDeleteDirectly(toDeleteFiles)
}
if confirmed {
job.deleteFiles(toDeleteFiles)
} else {
job.userCancel = true
}
}
if len(toTrashFiles) != 0 {
skippedFileNum = job.trashFiles(toTrashFiles)
}
if skippedFileNum == len(job.files) {
job.userCancel = true
}
}
// create DeleteJob for delete files or trash files, using internally.
func newDeleteOrTrashJob(files []*gio.File, trash bool, shouldConfirm bool, uiDelegate IUIDelegate) *DeleteJob {
job := &DeleteJob{
trash: trash,
shouldConfirm: shouldConfirm,
}
job.init(files, uiDelegate)
return job
}
// convenient function for creating delete or trash job.
func delOrTrash(urls []string, trash bool, shouldConfirm bool, uiDelegate IUIDelegate) *DeleteJob {
files := make([]*gio.File, len(urls))
for i, fileURL := range urls {
files[i] = gio.FileNewForCommandlineArg(fileURL)
}
return newDeleteOrTrashJob(files, trash, shouldConfirm, uiDelegate)
}
// NewDeleteJob creates a new delete job to delete files or directories.
func NewDeleteJob(urls []string, shouldConfirm bool, uiDelegate IUIDelegate) *DeleteJob {
return delOrTrash(urls, false, shouldConfirm, uiDelegate)
}
// NewTrashJob creates a new trash job to trash files or directories.
func NewTrashJob(urls []string, shouldConfirm bool, uiDelegate IUIDelegate) *DeleteJob {
return delOrTrash(urls, true, shouldConfirm, uiDelegate)
}