From 77a0f68758905faa74407499ff92c90929e27989 Mon Sep 17 00:00:00 2001
From: Drew DeVault <sir@cmpwn.com>
Date: Wed, 10 Jan 2018 22:41:15 -0500
Subject: Make termbox event loop async

---
 ui/render.go | 53 ++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 44 insertions(+), 9 deletions(-)

(limited to 'ui/render.go')

diff --git a/ui/render.go b/ui/render.go
index bca0cf6..4fedc2c 100644
--- a/ui/render.go
+++ b/ui/render.go
@@ -8,15 +8,21 @@ import (
 
 func Initialize(conf *config.AercConfig) (*UIState, error) {
 	state := UIState{
+		Config:       conf,
 		InvalidPanes: InvalidateAll,
-		Tabs:         make([]AercTab, len(conf.Accounts)),
+
+		tbEvents: make(chan tb.Event, 10),
 	}
-	// TODO: Initialize each tab to a mailbox tab
 	if err := tb.Init(); err != nil {
 		return nil, err
 	}
 	tb.SetInputMode(tb.InputEsc | tb.InputMouse)
 	tb.SetOutputMode(tb.Output256)
+	go (func() {
+		for !state.Exit {
+			state.tbEvents <- tb.PollEvent()
+		}
+	})()
 	return &state, nil
 }
 
@@ -24,21 +30,50 @@ func (state *UIState) Close() {
 	tb.Close()
 }
 
+func (state *UIState) AddTab(tab AercTab) {
+	state.Tabs = append(state.Tabs, tab)
+}
+
 func (state *UIState) Invalidate(what uint) {
 	state.InvalidPanes |= what
 }
 
+func (state *UIState) calcGeometries() {
+	width, height := tb.Size()
+	// TODO: more
+	state.Panes.TabView = Geometry{
+		Row:    0,
+		Col:    0,
+		Width:  width,
+		Height: height,
+	}
+}
+
 func (state *UIState) Tick() bool {
-	switch e := tb.PollEvent(); e.Type {
-	case tb.EventKey:
-		if e.Key == tb.KeyEsc {
-			state.Exit = true
+	select {
+	case event := <-state.tbEvents:
+		switch event.Type {
+		case tb.EventKey:
+			if event.Key == tb.KeyEsc {
+				state.Exit = true
+			}
+		case tb.EventResize:
+			state.Invalidate(InvalidateAll)
 		}
-	case tb.EventResize:
-		state.Invalidate(InvalidateAll)
+	default:
+		// no-op
+		break
 	}
 	if state.InvalidPanes != 0 {
-		// TODO: re-render
+		if state.InvalidPanes&InvalidateAll == InvalidateAll {
+			tb.Clear(tb.ColorDefault, tb.ColorDefault)
+			state.calcGeometries()
+		}
+		if state.InvalidPanes&InvalidateTabs != 0 {
+			tab := state.Tabs[state.SelectedTab]
+			tab.Render(state.Panes.TabView)
+		}
+		tb.Flush()
 		state.InvalidPanes = 0
 	}
 	return true
-- 
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