~sircmpwn/aerc

aerc/lib/ui/ui.go -rw-r--r-- 2.4 KiB View raw
caad1b2cDrew DeVault Revert "Add Style configuration" 3 days ago
                                                                                
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package ui

import (
	"sync/atomic"

	"github.com/gdamore/tcell"
)

type UI struct {
	Content DrawableInteractive
	exit    atomic.Value // bool
	ctx     *Context
	screen  tcell.Screen
	popover *Popover

	tcEvents chan tcell.Event
	invalid  int32 // access via atomic
}

func Initialize(content DrawableInteractive) (*UI, error) {
1 reference
screen, err := tcell.NewScreen() if err != nil { return nil, err } if err = screen.Init(); err != nil { return nil, err } screen.Clear() screen.HideCursor() width, height := screen.Size() state := UI{ Content: content, screen: screen, tcEvents: make(chan tcell.Event, 10), } state.ctx = NewContext(width, height, screen, state.onPopover) state.exit.Store(false) go func() { for !state.ShouldExit() { state.tcEvents <- screen.PollEvent() } }() state.invalid = 1 content.OnInvalidate(func(_ Drawable) { atomic.StoreInt32(&state.invalid, 1) }) if beeper, ok := content.(DrawableInteractiveBeeper); ok { beeper.OnBeep(screen.Beep) } content.Focus(true) if root, ok := content.(RootDrawable); ok { root.Initialize(&state) } return &state, nil } func (state *UI) onPopover(p *Popover) {
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state.popover = p } func (state *UI) ShouldExit() bool {
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return state.exit.Load().(bool) } func (state *UI) Exit() {
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state.exit.Store(true) } func (state *UI) Close() {
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state.screen.Fini() } func (state *UI) Tick() bool {
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more := false select { case event := <-state.tcEvents: switch event := event.(type) { case *tcell.EventResize: state.screen.Clear() width, height := event.Size() state.ctx = NewContext(width, height, state.screen, state.onPopover) state.Content.Invalidate() } // if we have a popover, and it can handle the event, it does so if state.popover == nil || !state.popover.Event(event) { // otherwise, we send the event to the main content state.Content.Event(event) } more = true default: } wasInvalid := atomic.SwapInt32(&state.invalid, 0) if wasInvalid != 0 { if state.popover != nil { // if the previous frame had a popover, rerender the entire display state.Content.Invalidate() atomic.StoreInt32(&state.invalid, 0) } // reset popover for the next Draw state.popover = nil state.Content.Draw(state.ctx) if state.popover != nil { // if the Draw resulted in a popover, draw it state.popover.Draw(state.ctx) } state.screen.Show() more = true } return more } func (state *UI) EnableMouse() {
1 reference
state.screen.EnableMouse() }