commit e41bb4d8ae8b8e25b30e25ce8e3319defc2457e6
Author: Petar Kapriš <petarkapris@firemail.cc>
Date:   Tue Jul 20 23:22:07 2021 +0200

    Initial commit

diff --git a/Main.go b/Main.go
new file mode 100644
index 0000000..60bb234
--- /dev/null
+++ b/Main.go
@@ -0,0 +1,135 @@
+package main
+
+import (
+	"log"
+	"os"
+	"time"
+	"strconv"
+	"unicode/utf8"
+
+
+	"github.com/gdamore/tcell/v2"
+)
+
+const (
+	dayWidth    = 2
+	gapWidth    = 1
+	monthWidth  = 7*dayWidth + 6*gapWidth
+	monthHeight = (31+6+(7-1))/7 + 2
+)
+
+var (
+	months = [...]string{"", "Јануар", "Фебруар", "Март", "Април", "Мај", "Јун",
+		"Јул", "Август", "Септембар", "Октобар", "Новембар", "Децембар"}
+	weekdays = [...]string{"Недеља", "Понедељак", "Уторак", "Среда", "Четвртак",
+		"Петак", "Субота"}
+)
+
+var (
+	wall tcell.Screen
+	defStyle tcell.Style
+	selStyle tcell.Style
+)
+
+var (
+	selTime time.Time
+	today   time.Time
+)
+
+func max(a, b int) int {
+	if a > b {
+		return a
+	}
+	return b
+}
+
+func date(year int, month time.Month, day int) time.Time {
+	return time.Date(year, month, day, 0, 0, 0, 0, time.Local)
+}
+
+func centeredText(s string, x, y, width int, scr tcell.Screen, style tcell.Style) {
+	start := x + max((width - utf8.RuneCountInString(s)) / 2, 0)
+	i := 0
+	for _, char := range s {
+		if i >= width {
+			break;
+		}
+
+		scr.SetContent(start + i, y, char, nil, style)
+		i++
+	}
+}
+
+func drawMonth(m time.Month, x, y int) {
+	centeredText(months[m], x, y, monthWidth, wall, defStyle)
+
+	for i := 1; i <= 7; i++ {
+		centeredText(weekdays[i % 7], x + (i - 1) * (dayWidth + gapWidth), y + 1, dayWidth, wall, defStyle)
+	}
+
+	dayNum := date(selTime.Year(), m + 1, 0).Day()
+	for i := 1; i <= dayNum; i++ {
+		weekday := int(date(selTime.Year(), m, i).Weekday())
+		style := defStyle
+		if selTime.Day() == i && selTime.Month() == m {
+			style = selStyle
+		}
+		centeredText(
+			strconv.Itoa(i),
+			x + ((weekday - 1 + 7) % 7) * (dayWidth + gapWidth),
+			y + 2,
+			2,
+			wall,
+			style)
+		if weekday == 0 {
+			y++
+		}
+	}
+}
+
+func drawWall() {
+}
+
+func main() {
+	today = time.Now()
+	selTime = today
+	var err error
+	wall, err = tcell.NewScreen()
+	if err != nil {
+		log.Fatalf("%+v", err)
+	}
+	if err := wall.Init(); err != nil {
+		log.Fatalf("%+v", err)
+	}
+	defStyle = tcell.StyleDefault.Background(tcell.ColorReset).Foreground(tcell.ColorReset)
+	selStyle = tcell.StyleDefault.Background(tcell.ColorReset).Foreground(tcell.GetColor("green")).Bold(true)
+
+	wall.SetStyle(defStyle)
+	wall.Clear()
+	drawMonth(time.January, 0, 0)
+	drawMonth(time.July, monthWidth * 2, 0)
+
+
+	quit := func() {
+		wall.Fini()
+		os.Exit(0)
+	}
+	for {
+		// Update screen
+		wall.Show()
+
+		// Poll event
+		ev := wall.PollEvent()
+
+		// Process event
+		switch ev := ev.(type) {
+		case *tcell.EventResize:
+			wall.Sync()
+		case *tcell.EventKey:
+			if ev.Key() == tcell.KeyEscape || ev.Key() == tcell.KeyCtrlC ||
+				ev.Rune() == 'Q' || ev.Rune() == 'q' {
+				quit()
+			}
+		}
+	}
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..d04e1de
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,8 @@
+module gitlab.com/tvrdosrz/ck
+
+go 1.16
+
+require (
+	github.com/gdamore/tcell v1.4.0
+	github.com/gdamore/tcell/v2 v2.3.11 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..694e761
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,22 @@
+github.com/gdamore/encoding v1.0.0 h1:+7OoQ1Bc6eTm5niUzBa0Ctsh6JbMW6Ra+YNuAtDBdko=
+github.com/gdamore/encoding v1.0.0/go.mod h1:alR0ol34c49FCSBLjhosxzcPHQbf2trDkoo5dl+VrEg=
+github.com/gdamore/tcell v1.4.0 h1:vUnHwJRvcPQa3tzi+0QI4U9JINXYJlOz9yiaiPQ2wMU=
+github.com/gdamore/tcell v1.4.0/go.mod h1:vxEiSDZdW3L+Uhjii9c3375IlDmR05bzxY404ZVSMo0=
+github.com/gdamore/tcell/v2 v2.3.11 h1:ECO6WqHGbKZ3HrSL7bG/zArMCmLaNr5vcjjMVnLHpzc=
+github.com/gdamore/tcell/v2 v2.3.11/go.mod h1:cTTuF84Dlj/RqmaCIV5p4w8uG1zWdk0SF6oBpwHp4fU=
+github.com/lucasb-eyer/go-colorful v1.0.3 h1:QIbQXiugsb+q10B+MI+7DI1oQLdmnep86tWFlaaUAac=
+github.com/lucasb-eyer/go-colorful v1.0.3/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
+github.com/mattn/go-runewidth v0.0.7 h1:Ei8KR0497xHyKJPAv59M1dkC+rOZCMBJ+t3fZ+twI54=
+github.com/mattn/go-runewidth v0.0.7/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
+github.com/mattn/go-runewidth v0.0.10 h1:CoZ3S2P7pvtP45xOtBw+/mDL2z0RKI576gSkzRRpdGg=
+github.com/mattn/go-runewidth v0.0.10/go.mod h1:RAqKPSqVFrSLVXbA8x7dzmKdmGzieGRCM46jaSJTDAk=
+github.com/rivo/uniseg v0.1.0 h1:+2KBaVoUmb9XzDsrx/Ct0W/EYOSFf/nWTauy++DprtY=
+github.com/rivo/uniseg v0.1.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
+golang.org/x/sys v0.0.0-20190626150813-e07cf5db2756 h1:9nuHUbU8dRnRRfj9KjWUVrJeoexdbeMjttk6Oh1rD10=
+golang.org/x/sys v0.0.0-20190626150813-e07cf5db2756/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68 h1:nxC68pudNYkKU6jWhgrqdreuFiOQWj1Fs7T3VrH4Pjw=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/term v0.0.0-20201210144234-2321bbc49cbf h1:MZ2shdL+ZM/XzY3ZGOnh4Nlpnxz5GSOhOmtHo3iPU6M=
+golang.org/x/term v0.0.0-20201210144234-2321bbc49cbf/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=