k9s/internal/views/help.go

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package views
import (
"context"
"fmt"
"github.com/derailed/tview"
"github.com/gdamore/tcell"
"github.com/rs/zerolog/log"
)
const (
helpTitle = "Help"
helpTitleFmt = " [aqua::b]%s "
)
type helpView struct {
*tview.TextView
app *appView
current igniter
actions keyActions
}
func newHelpView(app *appView) *helpView {
v := helpView{TextView: tview.NewTextView(), app: app, actions: make(keyActions)}
{
v.SetTextColor(tcell.ColorAqua)
v.SetBorder(true)
v.SetBorderPadding(0, 0, 1, 1)
v.SetDynamicColors(true)
v.SetInputCapture(v.keyboard)
v.current = app.content.GetPrimitive("main").(igniter)
}
v.actions[tcell.KeyEsc] = newKeyAction("Back", v.backCmd, true)
v.actions[tcell.KeyEnter] = newKeyAction("Back", v.backCmd, false)
return &v
}
func (v *helpView) keyboard(evt *tcell.EventKey) *tcell.EventKey {
key := evt.Key()
if key == tcell.KeyRune {
key = tcell.Key(evt.Rune())
}
if a, ok := v.actions[key]; ok {
log.Debug().Msgf(">> TableView handled %s", tcell.KeyNames[key])
return a.action(evt)
}
return evt
}
func (v *helpView) backCmd(evt *tcell.EventKey) *tcell.EventKey {
v.app.inject(v.current)
return nil
}
func (v *helpView) init(_ context.Context, _ string) {
v.resetTitle()
type helpItem struct {
key, description string
}
general := []helpItem{
{":<cmd>", "Command mode"},
{"/<term>", "Filter mode"},
{"esc", "Clear filter"},
{"tab", "Next term match"},
{"backtab", "Previous term match"},
{"Ctrl-r", "Refresh"},
{"Shift-i", "Invert Sort"},
{"p", "Previous resource view"},
{"q", "Quit"},
}
fmt.Fprintf(v, "🏠 [aqua::b]%s\n", "General")
for _, h := range general {
v.printHelp(h.key, h.description)
}
navigation := []helpItem{
{"g", "Goto Top"},
{"G", "Goto Bottom"},
{"b", "Page Down"},
{"f", "Page Up"},
{"l", "Left"},
{"h", "Right"},
{"k", "Up"},
{"j", "Down"},
}
fmt.Fprintf(v, "\n🤖 [aqua::b]%s\n", "View Navigation")
for _, h := range navigation {
v.printHelp(h.key, h.description)
}
views := []helpItem{
{"?", "Help"},
{"Ctrl-a", "Aliases view"},
}
fmt.Fprintf(v, "\n😱 [aqua::b]%s\n", "Help")
for _, h := range views {
v.printHelp(h.key, h.description)
}
v.app.setHints(v.hints())
}
func (v *helpView) printHelp(key, desc string) {
fmt.Fprintf(v, "[dodgerblue::b]%9s [white::]%s\n", key, desc)
}
func (v *helpView) hints() hints {
return v.actions.toHints()
}
func (v *helpView) getTitle() string {
return helpTitle
}
func (v *helpView) resetTitle() {
v.SetTitle(fmt.Sprintf(helpTitleFmt, helpTitle))
}