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|
package main
import (
"fmt"
tui "github.com/grindlemire/go-tui"
)
const maxEventLog = 500
type eventDump struct {
log *tui.State[[]string]
scrollY *tui.State[int]
following *tui.State[bool]
seq *tui.State[int]
feed *tui.Ref
}
func EventDump() *eventDump {
return &eventDump{
log: tui.NewState([]string{}),
scrollY: tui.NewState(0),
following: tui.NewState(true),
seq: tui.NewState(0),
feed: tui.NewRef(),
}
}
func (e *eventDump) Watchers() []tui.Watcher {
return []tui.Watcher{
tui.OnChange(e.log, e.autoScrollToBottom),
}
}
func (e *eventDump) autoScrollToBottom(_ []string) {
if !e.following.Get() {
return
}
el := e.feed.El()
if el == nil {
return
}
_, maxY := el.MaxScroll()
e.scrollY.Set(maxY)
}
func (e *eventDump) scrollBy(delta int) {
el := e.feed.El()
if el == nil {
return
}
_, maxY := el.MaxScroll()
newY := e.scrollY.Get() + delta
if newY < 0 {
newY = 0
}
if newY > maxY {
newY = maxY
}
e.scrollY.Set(newY)
e.following.Set(newY >= maxY)
}
func (e *eventDump) append(line string) {
n := e.seq.Get() + 1
e.seq.Set(n)
tagged := fmt.Sprintf("#%03d %s", n, line)
e.log.Update(func(prev []string) []string {
next := append(prev, tagged)
if len(next) > maxEventLog {
next = next[len(next)-maxEventLog:]
}
return next
})
}
func (e *eventDump) KeyMap() tui.KeyMap {
return tui.KeyMap{
tui.OnStop(tui.KeyEscape, func(ke tui.KeyEvent) {
e.append(formatKey(ke) + " [QUIT]")
ke.App().Stop()
}),
tui.OnStop(tui.Rune('q'), func(ke tui.KeyEvent) {
e.append(formatKey(ke) + " [QUIT]")
ke.App().Stop()
}),
tui.On(tui.AnyKey, func(ke tui.KeyEvent) {
e.append(formatKey(ke))
}),
}
}
func (e *eventDump) statusLine() string {
stateY := e.scrollY.Get()
following := e.following.Get()
entries := len(e.log.Get())
elY, contentH, viewportH := -1, -1, -1
if el := e.feed.El(); el != nil {
_, elY = el.ScrollOffset()
_, contentH = el.ContentSize()
_, viewportH = el.ViewportSize()
}
return fmt.Sprintf(
"STATUS: stateY=%d elY=%d following=%v entries=%d contentH=%d viewportH=%d",
stateY, elY, following, entries, contentH, viewportH,
)
}
func (e *eventDump) HandleMouse(me tui.MouseEvent) bool {
e.append(formatMouse(me))
switch me.Button {
case tui.MouseWheelUp:
e.scrollBy(-3)
return true
case tui.MouseWheelDown:
e.scrollBy(3)
return true
}
return false
}
func formatKey(ke tui.KeyEvent) string {
if ke.Key == tui.KeyRune {
return fmt.Sprintf("KEY Rune=%q Mod=%s", ke.Rune, ke.Mod)
}
return fmt.Sprintf("KEY %s Mod=%s", ke.Key, ke.Mod)
}
func formatMouse(me tui.MouseEvent) string {
return fmt.Sprintf("MOUSE %s %s X=%d Y=%d Mod=%s",
buttonString(me.Button), actionString(me.Action), me.X, me.Y, me.Mod)
}
func buttonString(b tui.MouseButton) string {
switch b {
case tui.MouseLeft:
return "Left"
case tui.MouseMiddle:
return "Middle"
case tui.MouseRight:
return "Right"
case tui.MouseWheelUp:
return "WheelUp"
case tui.MouseWheelDown:
return "WheelDown"
case tui.MouseNone:
return "None"
}
return "?"
}
func actionString(a tui.MouseAction) string {
switch a {
case tui.MousePress:
return "Press"
case tui.MouseRelease:
return "Release"
case tui.MouseDrag:
return "Drag"
}
return "?"
}
func (e *eventDump) Render(app *tui.App) *tui.Element {
__tui_0 := tui.New(
tui.WithDisplay(tui.DisplayFlex), tui.WithDirection(tui.Column),
tui.WithGap(1),
tui.WithPadding(1),
tui.WithBorder(tui.BorderRounded),
tui.WithBorderStyle(tui.NewStyle().Foreground(tui.Cyan)),
tui.WithFlexGrow(1),
)
__tui_1 := tui.New(
tui.WithText("Event Dump"),
tui.WithTextGradient(tui.NewGradient(tui.Cyan, tui.Magenta).WithDirection(tui.GradientHorizontal)),
tui.WithTextStyle(tui.NewStyle().Bold()),
)
__tui_0.AddChild(__tui_1)
__tui_2 := tui.New(
tui.WithText(e.statusLine()),
tui.WithTextStyle(tui.NewStyle().Foreground(tui.Yellow).Bold()),
)
__tui_0.AddChild(__tui_2)
__tui_3 := tui.New(
tui.WithText("Press any key or click/scroll the mouse. Esc or q to quit."),
tui.WithTextStyle(tui.NewStyle().Dim()),
)
__tui_0.AddChild(__tui_3)
__tui_4 := tui.New(
tui.WithHR(),
tui.WithBorder(tui.BorderSingle),
)
__tui_0.AddChild(__tui_4)
__tui_5 := tui.New(
tui.WithDisplay(tui.DisplayFlex), tui.WithDirection(tui.Column),
tui.WithFlexGrow(1),
tui.WithScrollable(tui.ScrollVertical),
tui.WithScrollbarHidden(true),
tui.WithScrollOffset(0, e.scrollY.Get()),
)
e.feed.Set(__tui_5)
for __idx_0, line := range e.log.Get() {
_ = __idx_0
__tui_6 := tui.New(
tui.WithText(line),
tui.WithTruncate(true),
)
__tui_5.AddChild(__tui_6)
}
__tui_0.AddChild(__tui_5)
return __tui_0
}
func (e *eventDump) bindAppFields(app *tui.App) {
if e.log != nil {
e.log.BindApp(app)
}
if e.scrollY != nil {
e.scrollY.BindApp(app)
}
if e.following != nil {
e.following.BindApp(app)
}
if e.seq != nil {
e.seq.BindApp(app)
}
}
func (e *eventDump) BindApp(app *tui.App) {
e.bindAppFields(app)
}
var _ tui.AppBinder = (*eventDump)(nil)
var (
_ tui.KeyListener = (*eventDump)(nil)
_ tui.MouseListener = (*eventDump)(nil)
_ tui.WatcherProvider = (*eventDump)(nil)
)
|