mirror of
https://github.com/crazy-max/diun.git
synced 2024-12-22 19:38:28 +00:00
361 lines
10 KiB
Go
361 lines
10 KiB
Go
package survey
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
|
|
"github.com/AlecAivazis/survey/v2/core"
|
|
"github.com/AlecAivazis/survey/v2/terminal"
|
|
)
|
|
|
|
/*
|
|
MultiSelect is a prompt that presents a list of various options to the user
|
|
for them to select using the arrow keys and enter. Response type is a slice of strings.
|
|
|
|
days := []string{}
|
|
prompt := &survey.MultiSelect{
|
|
Message: "What days do you prefer:",
|
|
Options: []string{"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"},
|
|
}
|
|
survey.AskOne(prompt, &days)
|
|
*/
|
|
type MultiSelect struct {
|
|
Renderer
|
|
Message string
|
|
Options []string
|
|
Default interface{}
|
|
Help string
|
|
PageSize int
|
|
VimMode bool
|
|
FilterMessage string
|
|
Filter func(filter string, value string, index int) bool
|
|
Description func(value string, index int) string
|
|
filter string
|
|
selectedIndex int
|
|
checked map[int]bool
|
|
showingHelp bool
|
|
}
|
|
|
|
// data available to the templates when processing
|
|
type MultiSelectTemplateData struct {
|
|
MultiSelect
|
|
Answer string
|
|
ShowAnswer bool
|
|
Checked map[int]bool
|
|
SelectedIndex int
|
|
ShowHelp bool
|
|
Description func(value string, index int) string
|
|
PageEntries []core.OptionAnswer
|
|
Config *PromptConfig
|
|
|
|
// These fields are used when rendering an individual option
|
|
CurrentOpt core.OptionAnswer
|
|
CurrentIndex int
|
|
}
|
|
|
|
// IterateOption sets CurrentOpt and CurrentIndex appropriately so a multiselect option can be rendered individually
|
|
func (m MultiSelectTemplateData) IterateOption(ix int, opt core.OptionAnswer) interface{} {
|
|
copy := m
|
|
copy.CurrentIndex = ix
|
|
copy.CurrentOpt = opt
|
|
return copy
|
|
}
|
|
|
|
func (m MultiSelectTemplateData) GetDescription(opt core.OptionAnswer) string {
|
|
if m.Description == nil {
|
|
return ""
|
|
}
|
|
return m.Description(opt.Value, opt.Index)
|
|
}
|
|
|
|
var MultiSelectQuestionTemplate = `
|
|
{{- define "option"}}
|
|
{{- if eq .SelectedIndex .CurrentIndex }}{{color .Config.Icons.SelectFocus.Format }}{{ .Config.Icons.SelectFocus.Text }}{{color "reset"}}{{else}} {{end}}
|
|
{{- if index .Checked .CurrentOpt.Index }}{{color .Config.Icons.MarkedOption.Format }} {{ .Config.Icons.MarkedOption.Text }} {{else}}{{color .Config.Icons.UnmarkedOption.Format }} {{ .Config.Icons.UnmarkedOption.Text }} {{end}}
|
|
{{- color "reset"}}
|
|
{{- " "}}{{- .CurrentOpt.Value}}{{ if ne ($.GetDescription .CurrentOpt) "" }} - {{color "cyan"}}{{ $.GetDescription .CurrentOpt }}{{color "reset"}}{{end}}
|
|
{{end}}
|
|
{{- if .ShowHelp }}{{- color .Config.Icons.Help.Format }}{{ .Config.Icons.Help.Text }} {{ .Help }}{{color "reset"}}{{"\n"}}{{end}}
|
|
{{- color .Config.Icons.Question.Format }}{{ .Config.Icons.Question.Text }} {{color "reset"}}
|
|
{{- color "default+hb"}}{{ .Message }}{{ .FilterMessage }}{{color "reset"}}
|
|
{{- if .ShowAnswer}}{{color "cyan"}} {{.Answer}}{{color "reset"}}{{"\n"}}
|
|
{{- else }}
|
|
{{- " "}}{{- color "cyan"}}[Use arrows to move, space to select,{{- if not .Config.RemoveSelectAll }} <right> to all,{{end}}{{- if not .Config.RemoveSelectNone }} <left> to none,{{end}} type to filter{{- if and .Help (not .ShowHelp)}}, {{ .Config.HelpInput }} for more help{{end}}]{{color "reset"}}
|
|
{{- "\n"}}
|
|
{{- range $ix, $option := .PageEntries}}
|
|
{{- template "option" $.IterateOption $ix $option}}
|
|
{{- end}}
|
|
{{- end}}`
|
|
|
|
// OnChange is called on every keypress.
|
|
func (m *MultiSelect) OnChange(key rune, config *PromptConfig) {
|
|
options := m.filterOptions(config)
|
|
oldFilter := m.filter
|
|
|
|
if key == terminal.KeyArrowUp || (m.VimMode && key == 'k') {
|
|
// if we are at the top of the list
|
|
if m.selectedIndex == 0 {
|
|
// go to the bottom
|
|
m.selectedIndex = len(options) - 1
|
|
} else {
|
|
// decrement the selected index
|
|
m.selectedIndex--
|
|
}
|
|
} else if key == terminal.KeyTab || key == terminal.KeyArrowDown || (m.VimMode && key == 'j') {
|
|
// if we are at the bottom of the list
|
|
if m.selectedIndex == len(options)-1 {
|
|
// start at the top
|
|
m.selectedIndex = 0
|
|
} else {
|
|
// increment the selected index
|
|
m.selectedIndex++
|
|
}
|
|
// if the user pressed down and there is room to move
|
|
} else if key == terminal.KeySpace {
|
|
// the option they have selected
|
|
if m.selectedIndex < len(options) {
|
|
selectedOpt := options[m.selectedIndex]
|
|
|
|
// if we haven't seen this index before
|
|
if old, ok := m.checked[selectedOpt.Index]; !ok {
|
|
// set the value to true
|
|
m.checked[selectedOpt.Index] = true
|
|
} else {
|
|
// otherwise just invert the current value
|
|
m.checked[selectedOpt.Index] = !old
|
|
}
|
|
if !config.KeepFilter {
|
|
m.filter = ""
|
|
}
|
|
}
|
|
// only show the help message if we have one to show
|
|
} else if string(key) == config.HelpInput && m.Help != "" {
|
|
m.showingHelp = true
|
|
} else if key == terminal.KeyEscape {
|
|
m.VimMode = !m.VimMode
|
|
} else if key == terminal.KeyDeleteWord || key == terminal.KeyDeleteLine {
|
|
m.filter = ""
|
|
} else if key == terminal.KeyDelete || key == terminal.KeyBackspace {
|
|
if m.filter != "" {
|
|
runeFilter := []rune(m.filter)
|
|
m.filter = string(runeFilter[0 : len(runeFilter)-1])
|
|
}
|
|
} else if key >= terminal.KeySpace {
|
|
m.filter += string(key)
|
|
m.VimMode = false
|
|
} else if !config.RemoveSelectAll && key == terminal.KeyArrowRight {
|
|
for _, v := range options {
|
|
m.checked[v.Index] = true
|
|
}
|
|
if !config.KeepFilter {
|
|
m.filter = ""
|
|
}
|
|
} else if !config.RemoveSelectNone && key == terminal.KeyArrowLeft {
|
|
for _, v := range options {
|
|
m.checked[v.Index] = false
|
|
}
|
|
if !config.KeepFilter {
|
|
m.filter = ""
|
|
}
|
|
}
|
|
|
|
m.FilterMessage = ""
|
|
if m.filter != "" {
|
|
m.FilterMessage = " " + m.filter
|
|
}
|
|
if oldFilter != m.filter {
|
|
// filter changed
|
|
options = m.filterOptions(config)
|
|
if len(options) > 0 && len(options) <= m.selectedIndex {
|
|
m.selectedIndex = len(options) - 1
|
|
}
|
|
}
|
|
// paginate the options
|
|
// figure out the page size
|
|
pageSize := m.PageSize
|
|
// if we dont have a specific one
|
|
if pageSize == 0 {
|
|
// grab the global value
|
|
pageSize = config.PageSize
|
|
}
|
|
|
|
// TODO if we have started filtering and were looking at the end of a list
|
|
// and we have modified the filter then we should move the page back!
|
|
opts, idx := paginate(pageSize, options, m.selectedIndex)
|
|
|
|
tmplData := MultiSelectTemplateData{
|
|
MultiSelect: *m,
|
|
SelectedIndex: idx,
|
|
Checked: m.checked,
|
|
ShowHelp: m.showingHelp,
|
|
Description: m.Description,
|
|
PageEntries: opts,
|
|
Config: config,
|
|
}
|
|
|
|
// render the options
|
|
_ = m.RenderWithCursorOffset(MultiSelectQuestionTemplate, tmplData, opts, idx)
|
|
}
|
|
|
|
func (m *MultiSelect) filterOptions(config *PromptConfig) []core.OptionAnswer {
|
|
// the filtered list
|
|
answers := []core.OptionAnswer{}
|
|
|
|
// if there is no filter applied
|
|
if m.filter == "" {
|
|
// return all of the options
|
|
return core.OptionAnswerList(m.Options)
|
|
}
|
|
|
|
// the filter to apply
|
|
filter := m.Filter
|
|
if filter == nil {
|
|
filter = config.Filter
|
|
}
|
|
|
|
// apply the filter to each option
|
|
for i, opt := range m.Options {
|
|
// i the filter says to include the option
|
|
if filter(m.filter, opt, i) {
|
|
answers = append(answers, core.OptionAnswer{
|
|
Index: i,
|
|
Value: opt,
|
|
})
|
|
}
|
|
}
|
|
|
|
// we're done here
|
|
return answers
|
|
}
|
|
|
|
func (m *MultiSelect) Prompt(config *PromptConfig) (interface{}, error) {
|
|
// compute the default state
|
|
m.checked = make(map[int]bool)
|
|
// if there is a default
|
|
if m.Default != nil {
|
|
// if the default is string values
|
|
if defaultValues, ok := m.Default.([]string); ok {
|
|
for _, dflt := range defaultValues {
|
|
for i, opt := range m.Options {
|
|
// if the option corresponds to the default
|
|
if opt == dflt {
|
|
// we found our initial value
|
|
m.checked[i] = true
|
|
// stop looking
|
|
break
|
|
}
|
|
}
|
|
}
|
|
// if the default value is index values
|
|
} else if defaultIndices, ok := m.Default.([]int); ok {
|
|
// go over every index we need to enable by default
|
|
for _, idx := range defaultIndices {
|
|
// and enable it
|
|
m.checked[idx] = true
|
|
}
|
|
}
|
|
}
|
|
|
|
// if there are no options to render
|
|
if len(m.Options) == 0 {
|
|
// we failed
|
|
return "", errors.New("please provide options to select from")
|
|
}
|
|
|
|
// figure out the page size
|
|
pageSize := m.PageSize
|
|
// if we dont have a specific one
|
|
if pageSize == 0 {
|
|
// grab the global value
|
|
pageSize = config.PageSize
|
|
}
|
|
// paginate the options
|
|
// build up a list of option answers
|
|
opts, idx := paginate(pageSize, core.OptionAnswerList(m.Options), m.selectedIndex)
|
|
|
|
cursor := m.NewCursor()
|
|
cursor.Save() // for proper cursor placement during selection
|
|
cursor.Hide() // hide the cursor
|
|
defer cursor.Show() // show the cursor when we're done
|
|
defer cursor.Restore() // clear any accessibility offsetting on exit
|
|
|
|
tmplData := MultiSelectTemplateData{
|
|
MultiSelect: *m,
|
|
SelectedIndex: idx,
|
|
Description: m.Description,
|
|
Checked: m.checked,
|
|
PageEntries: opts,
|
|
Config: config,
|
|
}
|
|
|
|
// ask the question
|
|
err := m.RenderWithCursorOffset(MultiSelectQuestionTemplate, tmplData, opts, idx)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
rr := m.NewRuneReader()
|
|
_ = rr.SetTermMode()
|
|
defer func() {
|
|
_ = rr.RestoreTermMode()
|
|
}()
|
|
|
|
// start waiting for input
|
|
for {
|
|
r, _, err := rr.ReadRune()
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
if r == '\r' || r == '\n' {
|
|
break
|
|
}
|
|
if r == terminal.KeyInterrupt {
|
|
return "", terminal.InterruptErr
|
|
}
|
|
if r == terminal.KeyEndTransmission {
|
|
break
|
|
}
|
|
m.OnChange(r, config)
|
|
}
|
|
m.filter = ""
|
|
m.FilterMessage = ""
|
|
|
|
answers := []core.OptionAnswer{}
|
|
for i, option := range m.Options {
|
|
if val, ok := m.checked[i]; ok && val {
|
|
answers = append(answers, core.OptionAnswer{Value: option, Index: i})
|
|
}
|
|
}
|
|
|
|
return answers, nil
|
|
}
|
|
|
|
// Cleanup removes the options section, and renders the ask like a normal question.
|
|
func (m *MultiSelect) Cleanup(config *PromptConfig, val interface{}) error {
|
|
// the answer to show
|
|
answer := ""
|
|
for _, ans := range val.([]core.OptionAnswer) {
|
|
answer = fmt.Sprintf("%s, %s", answer, ans.Value)
|
|
}
|
|
|
|
// if we answered anything
|
|
if len(answer) > 2 {
|
|
// remove the precending commas
|
|
answer = answer[2:]
|
|
}
|
|
|
|
// execute the output summary template with the answer
|
|
return m.Render(
|
|
MultiSelectQuestionTemplate,
|
|
MultiSelectTemplateData{
|
|
MultiSelect: *m,
|
|
SelectedIndex: m.selectedIndex,
|
|
Checked: m.checked,
|
|
Answer: answer,
|
|
ShowAnswer: true,
|
|
Description: m.Description,
|
|
Config: config,
|
|
},
|
|
)
|
|
}
|