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Merge pull request #437 from noborus/save-buffer
Add save buffer
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,66 @@ | ||
| package oviewer | ||
|
|
||
| import "github.com/gdamore/tcell/v2" | ||
|
|
||
| // setSaveBuffer is a wrapper to move to setSaveBufferMode. | ||
| func (root *Root) setSaveBuffer() { | ||
| if root.Doc.seekable { | ||
| root.setMessage("Saving regular files is not supported") | ||
| return | ||
| } | ||
| root.setSaveBufferMode() | ||
| } | ||
|
|
||
| // setSaveBufferMode sets the inputMode to SaveBuffer. | ||
| func (root *Root) setSaveBufferMode() { | ||
| input := root.input | ||
| input.value = "" | ||
| input.cursorX = 0 | ||
| input.Event = newSaveBufferEvent(input.SaveBufferCandidate) | ||
| } | ||
|
|
||
| // saveBufferCandidate returns the candidate to set to default. | ||
| func saveBufferCandidate() *candidate { | ||
| return &candidate{ | ||
| list: []string{}, | ||
| } | ||
| } | ||
|
|
||
| // eventSaveBuffer represents the mode input mode. | ||
| type eventSaveBuffer struct { | ||
| tcell.EventTime | ||
| clist *candidate | ||
| value string | ||
| } | ||
|
|
||
| // newSaveBufferEvent returns SaveBufferModeEvent. | ||
| func newSaveBufferEvent(clist *candidate) *eventSaveBuffer { | ||
| return &eventSaveBuffer{clist: clist} | ||
| } | ||
|
|
||
| // Mode returns InputMode. | ||
| func (e *eventSaveBuffer) Mode() InputMode { | ||
| return SaveBuffer | ||
| } | ||
|
|
||
| // Prompt returns the prompt string in the input field. | ||
| func (e *eventSaveBuffer) Prompt() string { | ||
| return "(Save)file:" | ||
| } | ||
|
|
||
| // Confirm returns the event when the input is confirmed. | ||
| func (e *eventSaveBuffer) Confirm(str string) tcell.Event { | ||
| e.value = str | ||
| e.SetEventNow() | ||
| return e | ||
| } | ||
|
|
||
| // Up returns strings when the up key is pressed during input. | ||
| func (e *eventSaveBuffer) Up(str string) string { | ||
| return e.clist.up() | ||
| } | ||
|
|
||
| // Down returns strings when the down key is pressed during input. | ||
| func (e *eventSaveBuffer) Down(str string) string { | ||
| return e.clist.down() | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| package oviewer | ||
|
|
||
| import ( | ||
| "os" | ||
| "strings" | ||
|
|
||
| "github.com/gdamore/tcell/v2" | ||
| ) | ||
|
|
||
| type saveSelection string | ||
|
|
||
| const ( | ||
| saveCancel saveSelection = "cancel" | ||
| saveOverWrite saveSelection = "overwrite" | ||
| saveAppend saveSelection = "append" | ||
| ) | ||
|
|
||
| // saveBuffer saves the buffer to the specified file. | ||
| func (root *Root) saveBuffer(input string) { | ||
| fileName := strings.TrimSpace(input) | ||
|
|
||
| perm := os.FileMode(0644) | ||
| flag := os.O_WRONLY | os.O_CREATE | ||
| _, err := os.Stat(fileName) | ||
| if err == nil { | ||
| root.setMessagef("overwrite? (O)overwrite, (A)Append, (N)cancel:") | ||
| switch root.saveConfirm() { | ||
| case saveOverWrite: | ||
| flag = os.O_WRONLY | os.O_TRUNC | ||
| case saveAppend: | ||
| flag |= os.O_APPEND | ||
| case saveCancel: | ||
| root.setMessage("save cancel") | ||
| return | ||
| } | ||
| } | ||
|
|
||
| file, err := os.OpenFile(fileName, flag, perm) | ||
| if err != nil { | ||
| root.setMessageLogf("cannot save: %s:%s", fileName, err) | ||
| return | ||
| } | ||
| defer file.Close() | ||
|
|
||
| if err := root.Doc.Export(file, root.Doc.BufStartNum(), root.Doc.BufEndNum()); err != nil { | ||
| root.setMessageLogf("cannot save: %s:%s", fileName, err) | ||
| return | ||
| } | ||
|
|
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| root.setMessageLogf("saved %s", fileName) | ||
| } | ||
|
|
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| // saveConfirm waits for the user to confirm the save. | ||
| func (root *Root) saveConfirm() saveSelection { | ||
| for { | ||
| ev := root.Screen.PollEvent() | ||
| switch ev := ev.(type) { | ||
| case *tcell.EventKey: | ||
| if ev.Key() == tcell.KeyRune { | ||
| switch ev.Rune() { | ||
| case 'o', 'O': | ||
| return saveOverWrite | ||
| case 'a', 'A': | ||
| return saveAppend | ||
| case 'n', 'N', 'q', 'Q': | ||
| return saveCancel | ||
| } | ||
| } else if ev.Key() == tcell.KeyEscape { | ||
| return saveCancel | ||
| } | ||
| } | ||
| } | ||
| } |
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