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gui.go
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gui.go
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package main
import (
"fmt"
"strconv"
"strings"
"sync"
"github.com/jroimartin/gocui"
log "github.com/sirupsen/logrus"
)
type GoCUI struct {
*gocui.Gui
conversation *Conversation
spacesMutex sync.RWMutex
spacesMap map[string]int
spacesList []GuiSpace
currentSpaceIndex int
logger *log.Entry
}
type GuiSpace struct {
*Space
Highlight bool
NewMessage bool
}
func (g *GuiSpace) DisplayName() string {
name := g.Space.DisplayName
if g.Team != nil {
name = g.Team.DisplayName + "/" + name
}
return name
}
func NewGoCUI(c *Conversation) (*GoCUI, error) {
g, err := gocui.NewGui(gocui.OutputNormal)
if err != nil {
return nil, err
}
gui := &GoCUI{
Gui: g,
conversation: c,
spacesMap: make(map[string]int),
logger: log.WithField("type", "Gui"),
}
gui.Cursor = true
gui.SetManagerFunc(gui.layout)
if err := gui.keybindings(gui.Gui); err != nil {
return nil, err
}
c.AddNewSpaceEventHandler(gui.NewSpaceHandler)
c.AddNewActivityEventHandler(gui.NewActivityHandler)
return gui, nil
}
func (gui *GoCUI) Start() error {
if err := gui.MainLoop(); err != nil && err != gocui.ErrQuit {
return err
}
gui.Close()
return nil
}
func (gui *GoCUI) NewSpaceHandler(s *Space) {
gui.spacesMutex.Lock()
pos := len(gui.spacesList)
gui.spacesList = append(gui.spacesList, GuiSpace{Space: s})
gui.spacesMap[s.Id] = pos
gui.spacesMutex.Unlock()
gui.updateSpaceList()
if len(gui.spacesList) == 1 {
gui.updateMessages()
gui.updateSpaceStatus()
}
}
func (gui *GoCUI) NewActivityHandler(s *Space, a *Activity) {
gui.spacesMutex.RLock()
defer gui.spacesMutex.RUnlock()
if a.Verb == "post" || a.Verb == "share" {
spaceIndex := gui.spacesMap[s.Id]
if spaceIndex != gui.currentSpaceIndex {
gui.spacesList[spaceIndex].NewMessage = true
for _, v := range a.Object.Mentions.Items {
if v.Id == gui.conversation.device.UserID {
gui.spacesList[spaceIndex].Highlight = true
}
}
gui.updateSpaceList()
} else {
gui.updateMessages()
}
}
}
func (gui *GoCUI) quit(g *gocui.Gui, v *gocui.View) error {
return gocui.ErrQuit
}
func (gui *GoCUI) keybindings(g *gocui.Gui) error {
if err := g.SetKeybinding("", gocui.KeyCtrlC, gocui.ModNone, gui.quit); err != nil {
return err
}
if err := g.SetKeybinding("", gocui.KeyCtrlN, gocui.ModNone, gui.nextSpace); err != nil {
return err
}
if err := g.SetKeybinding("", gocui.KeyCtrlP, gocui.ModNone, gui.previousSpace); err != nil {
return err
}
if err := g.SetKeybinding("help", gocui.KeyEnter, gocui.ModNone, func(*gocui.Gui, *gocui.View) error { return gui.hideHelp() }); err != nil {
return err
}
if err := g.SetKeybinding("", gocui.KeyPgup, gocui.ModNone, gui.msgUp); err != nil {
return err
}
if err := g.SetKeybinding("", gocui.KeyPgdn, gocui.ModNone, gui.msgDown); err != nil {
return err
}
return nil
}
func (gui *GoCUI) nextSpace(g *gocui.Gui, v *gocui.View) error {
gui.moveToSpace(gui.currentSpaceIndex + 1)
return nil
}
func (gui *GoCUI) previousSpace(g *gocui.Gui, v *gocui.View) error {
gui.moveToSpace(gui.currentSpaceIndex - 1)
return nil
}
func (gui *GoCUI) msgUp(g *gocui.Gui, v *gocui.View) error {
return gui.msgScroll(-5)
}
func (gui *GoCUI) msgDown(g *gocui.Gui, v *gocui.View) error {
return gui.msgScroll(5)
}
func (gui *GoCUI) msgScroll(delta int) error {
v, _ := gui.View("messages")
// Current position
_, viewHeight := v.Size()
ox, oy := v.Origin()
if viewHeight+oy+delta > len(v.ViewBufferLines())-1 {
// We are at the bottom, enable Autoscroll
v.Autoscroll = true
} else {
// Set autoscroll to false and scroll.
v.Autoscroll = false
v.SetOrigin(ox, oy+delta)
}
gui.updateSpaceStatus()
return nil
}
func (gui *GoCUI) hideHelp() error {
gui.SetViewOnTop("messages")
gui.SetCurrentView("cmd")
gui.Cursor = true
return nil
}
func (gui *GoCUI) showHelp() error {
gui.SetViewOnTop("help")
gui.SetCurrentView("help")
gui.Cursor = false
return nil
}
func (gui *GoCUI) moveToSpace(i int) {
gui.spacesMutex.RLock()
defer gui.spacesMutex.RUnlock()
// Wrap
if i < 0 {
i = len(gui.spacesList) - 1
} else if i >= len(gui.spacesList) {
i = 0
}
gui.currentSpaceIndex = i
// Reset flags
gui.spacesList[i].NewMessage = false
gui.spacesList[i].Highlight = false
// Force go to bottom for messages
v, _ := gui.View("messages")
v.Autoscroll = true
// Refresh
gui.updateMessages()
gui.updateSpaceStatus()
gui.updateSpaceList()
}
func (gui *GoCUI) sendMessage(msg string) {
gui.spacesMutex.RLock()
defer gui.spacesMutex.RUnlock()
if msg[0] == '/' {
logger := gui.logger.WithField("cmd", msg)
logger.Trace("Exectuting command")
if msg[1:] == "help" {
gui.showHelp()
}
if msg[1:] == "quit" {
gui.Update(func(g *gocui.Gui) error {
return gocui.ErrQuit
})
}
if strings.HasPrefix(msg[1:], "win ") {
i, err := strconv.Atoi(msg[5:])
if err == nil && i > 0 && i <= len(gui.spacesList) {
gui.moveToSpace(i - 1)
} else {
// Try to find a space with a matching name
toSearch := strings.ToLower(msg[5:])
for i, v := range gui.spacesList {
if strings.Contains(strings.ToLower(v.DisplayName()), toSearch) {
gui.moveToSpace(i)
break
}
}
}
}
if strings.HasPrefix(msg[1:], "create ") {
gui.conversation.CreateSpace(msg[8:])
}
// Unknown command
} else {
gui.spacesList[gui.currentSpaceIndex].SendMessage(msg)
}
}
func (gui *GoCUI) updateSpaceList() {
gui.Update(func(g *gocui.Gui) error {
gui.spacesMutex.RLock()
defer gui.spacesMutex.RUnlock()
v, err := g.View("spaces")
if err != nil {
return err
}
v.Clear()
for i, s := range gui.spacesList {
color := "34"
if i == gui.currentSpaceIndex {
color = "37;44"
} else if s.Highlight {
color = "33"
} else if s.NewMessage {
color = "32"
}
fmt.Fprintf(v, "\033[32m%2d\033[0m.\033[%sm%s\033[0m\n", i+1, color, s.DisplayName())
}
return nil
})
}
func (gui *GoCUI) updateMessages() {
gui.Update(func(g *gocui.Gui) error {
gui.spacesMutex.RLock()
defer gui.spacesMutex.RUnlock()
v, err := g.View("messages")
if err != nil {
return err
}
v.Clear()
v.SetOrigin(0, 0)
space := gui.spacesList[gui.currentSpaceIndex]
for _, a := range space.Activities {
if a.Verb == "post" {
fmt.Fprintf(v, "%s %s> %s\n", a.Published.Format("15:04:05"), a.Actor.DisplayName, a.Object.DisplayName)
} else if a.Verb == "share" {
fmt.Fprintf(v, "%s %s has shared a content of type %q\n", a.Published.Format("15:04:05"), a.Actor.DisplayName, a.Object.ContentCategory)
if a.Object.DisplayName != "" {
fmt.Fprintf(v, "%s %s> %s\n", a.Published.Format("15:04:05"), a.Actor.DisplayName, a.Object.DisplayName)
}
}
}
return nil
})
}
func (gui *GoCUI) updateSpaceStatus() {
gui.Update(func(g *gocui.Gui) error {
gui.spacesMutex.RLock()
defer gui.spacesMutex.RUnlock()
v, _ := g.View("spaceStatus")
v.Clear()
space := gui.spacesList[gui.currentSpaceIndex]
fmt.Fprintf(v, "[%s]", space.DisplayName())
msgView, _ := g.View("messages")
if msgView.Autoscroll == false {
_, viewHeight := msgView.Size()
_, oy := msgView.Origin()
nbLines := len(msgView.ViewBufferLines())
moreLines := nbLines - viewHeight - oy
fmt.Fprintf(v, " -MORE(%d)-", moreLines)
}
return nil
})
}
func (gui *GoCUI) layout(g *gocui.Gui) error {
maxX, maxY := g.Size()
if _, err := g.SetView("spaces", -1, -1, 25, maxY); err != nil {
if err != gocui.ErrUnknownView {
return err
}
}
if v, err := g.SetView("help", 25, -1, maxX, maxY-2); err != nil {
if err != gocui.ErrUnknownView {
return err
}
v.Frame = false
fmt.Fprintf(v, " - Webinc %s HELP -\n", buildVersion)
fmt.Fprintln(v, "")
fmt.Fprintln(v, "List of commands:")
fmt.Fprintln(v, " \033[32m/create name \033[0mCreate a new space with name \033[32mname\033[0m")
fmt.Fprintln(v, " \033[32m/help \033[0mDisplay this help")
fmt.Fprintln(v, " \033[32m/win number \033[0mJump to space with number \033[32mnumber\033[0m")
fmt.Fprintln(v, " \033[32m/win name \033[0mJump to space with name contains \033[32mname\033[0m")
fmt.Fprintln(v, " \033[32m/quit \033[0mQuit the application")
fmt.Fprintln(v, "")
fmt.Fprintln(v, "List of keyboard shortcuts:")
fmt.Fprintln(v, " \033[32m^P \033[0mPrevious space")
fmt.Fprintln(v, " \033[32m^N \033[0mNext space")
fmt.Fprintln(v, " \033[32m^C \033[0mQuit the application")
fmt.Fprintln(v, " \033[32m^A \033[0mGo to the beginning of line")
fmt.Fprintln(v, " \033[32m^E \033[0mGo to the end of line")
fmt.Fprintln(v, " \033[32m^U \033[0mDelete the beginning of line")
fmt.Fprintln(v, " \033[32m^K \033[0mDelete the end of line")
fmt.Fprintln(v, "")
fmt.Fprintln(v, "Press ENTER to close")
}
if v, err := g.SetView("messages", 25, -1, maxX, maxY-2); err != nil {
if err != gocui.ErrUnknownView {
return err
}
v.Wrap = true
v.Autoscroll = true
v.Frame = false
}
if v, err := g.SetView("spaceStatus", 25, maxY-3, maxX, maxY-1); err != nil {
if err != gocui.ErrUnknownView {
return err
}
v.Wrap = true
v.Frame = false
v.BgColor = gocui.ColorBlue
}
if v, err := g.SetView("cmd", 25, maxY-2, maxX, maxY); err != nil {
if err != gocui.ErrUnknownView {
return err
}
v.Frame = false
v.Editable = true
v.Editor = NewHistoryEditor(gui.sendMessage)
if _, err := g.SetCurrentView("cmd"); err != nil {
return err
}
}
return nil
}