121 lines
2.2 KiB
Go
121 lines
2.2 KiB
Go
package main
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import (
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"fmt"
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"log"
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"strings"
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"github.com/jroimartin/gocui"
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)
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var messages []string
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var users = []string{"Alice", "Bob", "Charlie"}
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func layout(g *gocui.Gui) error {
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maxX, maxY := g.Size()
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if v, err := g.SetView("users", 0, 0, 20, maxY-1); err != nil {
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if err != gocui.ErrUnknownView {
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return err
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}
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v.Title = "Users"
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v.Clear()
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for _, u := range users {
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fmt.Fprintln(v, u)
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}
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}
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if v, err := g.SetView("chat", 21, 0, maxX-1, maxY-5); err != nil {
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if err != gocui.ErrUnknownView {
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return err
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}
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v.Title = "Chat"
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v.Wrap = true
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updateChatView(v)
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}
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if v, err := g.SetView("input", 21, maxY-4, maxX-1, maxY-1); err != nil {
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if err != gocui.ErrUnknownView {
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return err
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}
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v.Title = "Type your message"
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v.Editable = true
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v.Wrap = true
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if _, err := g.SetCurrentView("input"); err != nil {
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return err
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}
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}
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return nil
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}
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func updateChatView(v *gocui.View) {
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v.Clear()
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for _, msg := range messages {
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fmt.Fprintln(v, msg)
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}
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}
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func sendMessage(g *gocui.Gui, v *gocui.View) error {
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input := strings.TrimSpace(v.Buffer())
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v.Clear()
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v.SetCursor(0, 0)
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v.SetOrigin(0, 0)
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if input != "" {
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messages = append(messages, "You: "+input)
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if chatView, err := g.View("chat"); err == nil {
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updateChatView(chatView)
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}
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}
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v.Clear()
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v.SetCursor(0, 0)
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return nil
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}
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func keybindings(g *gocui.Gui) error {
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// Ctrl+C to quit
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if err := g.SetKeybinding("", gocui.KeyCtrlC, gocui.ModNone, quit); err != nil {
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return err
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}
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// Enter to send message
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// Enter adds a new line (multiline input)
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if err := g.SetKeybinding("input", gocui.KeyArrowDown, gocui.ModNone, insertNewline); err != nil {
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return err
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}
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// Ctrl+Enter sends the message
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if err := g.SetKeybinding("input", gocui.KeyEnter, gocui.ModNone, sendMessage); err != nil {
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return err
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}
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return nil
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}
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func insertNewline(g *gocui.Gui, v *gocui.View) error {
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v.EditNewLine()
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return nil
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}
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func quit(g *gocui.Gui, v *gocui.View) error {
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return gocui.ErrQuit
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}
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func main() {
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g, err := gocui.NewGui(gocui.OutputNormal)
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if err != nil {
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log.Panicln(err)
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}
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defer g.Close()
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g.SetManagerFunc(layout)
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if err := keybindings(g); err != nil {
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log.Panicln(err)
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}
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if err := g.MainLoop(); err != nil && err != gocui.ErrQuit {
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log.Panicln(err)
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}
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}
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