d1d38d1ed7
Signed-off-by: lvyaoting <lvyaoting@outlook.com>
178 lines
4.7 KiB
Go
178 lines
4.7 KiB
Go
package info
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import (
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"fmt"
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"github.com/zyedidia/micro/v2/internal/buffer"
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)
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// The InfoBuf displays messages and other info at the bottom of the screen.
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// It is represented as a buffer and a message with a style.
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type InfoBuf struct {
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*buffer.Buffer
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HasPrompt bool
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HasMessage bool
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HasError bool
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HasYN bool
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PromptType string
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Msg string
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YNResp bool
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// This map stores the history for all the different kinds of uses Prompt has
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// It's a map of history type -> history array
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History map[string][]string
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HistoryNum int
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// HistorySearch indicates whether we are searching for history items
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// beginning with HistorySearchPrefix
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HistorySearch bool
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HistorySearchPrefix string
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// Is the current message a message from the gutter
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HasGutter bool
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PromptCallback func(resp string, canceled bool)
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EventCallback func(resp string)
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YNCallback func(yes bool, canceled bool)
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}
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// NewBuffer returns a new infobuffer
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func NewBuffer() *InfoBuf {
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ib := new(InfoBuf)
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ib.History = make(map[string][]string)
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ib.Buffer = buffer.NewBufferFromString("", "", buffer.BTInfo)
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ib.LoadHistory()
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return ib
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}
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// Close performs any cleanup necessary when shutting down the infobuffer
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func (i *InfoBuf) Close() {
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i.SaveHistory()
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}
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// Message sends a message to the user
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func (i *InfoBuf) Message(msg ...interface{}) {
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// only display a new message if there isn't an active prompt
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// this is to prevent overwriting an existing prompt to the user
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if !i.HasPrompt {
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displayMessage := fmt.Sprint(msg...)
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// if there is no active prompt then style and display the message as normal
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i.Msg = displayMessage
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i.HasMessage, i.HasError = true, false
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}
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}
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// GutterMessage displays a message and marks it as a gutter message
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func (i *InfoBuf) GutterMessage(msg ...interface{}) {
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i.Message(msg...)
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i.HasGutter = true
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}
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// ClearGutter clears the info bar and unmarks the message
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func (i *InfoBuf) ClearGutter() {
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i.HasGutter = false
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i.Message("")
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}
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// Error sends an error message to the user
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func (i *InfoBuf) Error(msg ...interface{}) {
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// only display a new message if there isn't an active prompt
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// this is to prevent overwriting an existing prompt to the user
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if !i.HasPrompt {
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// if there is no active prompt then style and display the message as normal
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i.Msg = fmt.Sprint(msg...)
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i.HasMessage, i.HasError = false, true
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}
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// TODO: add to log?
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}
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// Prompt starts a prompt for the user, it takes a prompt, a possibly partially filled in msg
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// and callbacks executed when the user executes an event and when the user finishes the prompt
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// The eventcb passes the current user response as the argument and donecb passes the user's message
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// and a boolean indicating if the prompt was canceled
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func (i *InfoBuf) Prompt(prompt string, msg string, ptype string, eventcb func(string), donecb func(string, bool)) {
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// If we get another prompt mid-prompt we cancel the one getting overwritten
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if i.HasPrompt {
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i.DonePrompt(true)
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}
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if _, ok := i.History[ptype]; !ok {
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i.History[ptype] = []string{""}
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} else {
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i.History[ptype] = append(i.History[ptype], "")
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}
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i.HistoryNum = len(i.History[ptype]) - 1
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i.HistorySearch = false
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i.PromptType = ptype
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i.Msg = prompt
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i.HasPrompt = true
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i.HasMessage, i.HasError, i.HasYN = false, false, false
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i.HasGutter = false
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i.PromptCallback = donecb
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i.EventCallback = eventcb
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i.Buffer.Insert(i.Buffer.Start(), msg)
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}
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// YNPrompt creates a yes or no prompt, and the callback returns the yes/no result and whether
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// the prompt was canceled
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func (i *InfoBuf) YNPrompt(prompt string, donecb func(bool, bool)) {
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if i.HasPrompt {
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i.DonePrompt(true)
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}
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i.Msg = prompt
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i.HasPrompt = true
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i.HasYN = true
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i.HasMessage, i.HasError = false, false
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i.HasGutter = false
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i.YNCallback = donecb
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}
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// DonePrompt finishes the current prompt and indicates whether or not it was canceled
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func (i *InfoBuf) DonePrompt(canceled bool) {
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hadYN := i.HasYN
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i.HasPrompt = false
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i.HasYN = false
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i.HasGutter = false
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if !hadYN {
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if i.PromptCallback != nil {
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if canceled {
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i.Replace(i.Start(), i.End(), "")
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i.PromptCallback("", true)
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h := i.History[i.PromptType]
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i.History[i.PromptType] = h[:len(h)-1]
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} else {
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resp := string(i.LineBytes(0))
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i.Replace(i.Start(), i.End(), "")
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i.PromptCallback(resp, false)
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h := i.History[i.PromptType]
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h[len(h)-1] = resp
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// avoid duplicates
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for j := len(h) - 2; j >= 0; j-- {
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if h[j] == h[len(h)-1] {
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i.History[i.PromptType] = append(h[:j], h[j+1:]...)
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break
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}
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}
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}
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// i.PromptCallback = nil
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}
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}
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if i.YNCallback != nil && hadYN {
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i.YNCallback(i.YNResp, canceled)
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}
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}
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// Reset resets the infobuffer's msg and info
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func (i *InfoBuf) Reset() {
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i.Msg = ""
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i.HasPrompt, i.HasMessage, i.HasError = false, false, false
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i.HasGutter = false
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}
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