From f08e81d72a4a3cb0e4fa08b323b0ce664a463f1d Mon Sep 17 00:00:00 2001
From: Caleb Bassi <calebjbassi@gmail.com>
Date: Tue, 18 Jun 2019 12:30:44 -0700
Subject: [PATCH] Readd drawille-go into repo

---
 canvas.go            |  2 +-
 drawille/drawille.go | 90 ++++++++++++++++++++++++++++++++++++++++++++
 go.mod               |  2 -
 go.sum               |  4 --
 4 files changed, 91 insertions(+), 7 deletions(-)
 create mode 100644 drawille/drawille.go

diff --git a/canvas.go b/canvas.go
index 31d713e..9001d98 100644
--- a/canvas.go
+++ b/canvas.go
@@ -3,7 +3,7 @@ package termui
 import (
 	"image"
 
-	drawille "github.com/cjbassi/drawille-go"
+	"github.com/gizak/termui/v3/drawille"
 )
 
 type Canvas struct {
diff --git a/drawille/drawille.go b/drawille/drawille.go
new file mode 100644
index 0000000..11401a3
--- /dev/null
+++ b/drawille/drawille.go
@@ -0,0 +1,90 @@
+package drawille
+
+import (
+	"image"
+)
+
+const BRAILLE_OFFSET = '\u2800'
+
+var BRAILLE = [4][2]rune{
+	{'\u0001', '\u0008'},
+	{'\u0002', '\u0010'},
+	{'\u0004', '\u0020'},
+	{'\u0040', '\u0080'},
+}
+
+type Color int
+
+type Cell struct {
+	Rune  rune
+	Color Color
+}
+
+type Canvas struct {
+	CellMap map[image.Point]Cell
+}
+
+func NewCanvas() *Canvas {
+	return &Canvas{
+		CellMap: make(map[image.Point]Cell),
+	}
+}
+
+func (self *Canvas) SetPoint(p image.Point, color Color) {
+	point := image.Pt(p.X/2, p.Y/4)
+	self.CellMap[point] = Cell{
+		self.CellMap[point].Rune | BRAILLE[p.Y%4][p.X%2],
+		color,
+	}
+}
+
+func (self *Canvas) SetLine(p0, p1 image.Point, color Color) {
+	for _, p := range line(p0, p1) {
+		self.SetPoint(p, color)
+	}
+}
+
+func (self *Canvas) GetCells() map[image.Point]Cell {
+	cellMap := make(map[image.Point]Cell)
+	for point, cell := range self.CellMap {
+		cellMap[point] = Cell{cell.Rune + BRAILLE_OFFSET, cell.Color}
+	}
+	return cellMap
+}
+
+func line(p0, p1 image.Point) []image.Point {
+	points := []image.Point{}
+
+	leftPoint, rightPoint := p0, p1
+	if leftPoint.X > rightPoint.X {
+		leftPoint, rightPoint = rightPoint, leftPoint
+	}
+
+	xDistance := absInt(leftPoint.X - rightPoint.X)
+	yDistance := absInt(leftPoint.Y - rightPoint.Y)
+	slope := float64(yDistance) / float64(xDistance)
+	slopeSign := 1
+	if rightPoint.Y < leftPoint.Y {
+		slopeSign = -1
+	}
+
+	targetYCoordinate := float64(leftPoint.Y)
+	currentYCoordinate := leftPoint.Y
+	for i := leftPoint.X; i < rightPoint.X; i++ {
+		points = append(points, image.Pt(i, currentYCoordinate))
+		targetYCoordinate += (slope * float64(slopeSign))
+		for currentYCoordinate != int(targetYCoordinate) {
+			points = append(points, image.Pt(i, currentYCoordinate))
+			currentYCoordinate += slopeSign
+		}
+	}
+
+	return points
+}
+
+func absInt(x int) int {
+	if x >= 0 {
+		return x
+	}
+	return -x
+}
diff --git a/go.mod b/go.mod
index ef0b95f..69dd6e2 100644
--- a/go.mod
+++ b/go.mod
@@ -1,9 +1,7 @@
 module github.com/gizak/termui/v3
 
 require (
-	github.com/cjbassi/drawille-go v0.0.0-20190126131713-27dc511fe6fd
 	github.com/mattn/go-runewidth v0.0.2
 	github.com/mitchellh/go-wordwrap v0.0.0-20150314170334-ad45545899c7
 	github.com/nsf/termbox-go v0.0.0-20190121233118-02980233997d
-	golang.org/x/arch v0.0.0-20181203225421-5a4828bb7045 // indirect
 )
diff --git a/go.sum b/go.sum
index 121df84..bda2a1a 100644
--- a/go.sum
+++ b/go.sum
@@ -1,10 +1,6 @@
-github.com/cjbassi/drawille-go v0.0.0-20190126131713-27dc511fe6fd h1:XtfPmj9tQRilnrEmI1HjQhxXWRhEM+m8CACtaMJE/kM=
-github.com/cjbassi/drawille-go v0.0.0-20190126131713-27dc511fe6fd/go.mod h1:vjcQJUZJYD3MeVGhtZXSMnCHfUNZxsyYzJt90eCYxK4=
 github.com/mattn/go-runewidth v0.0.2 h1:UnlwIPBGaTZfPQ6T1IGzPI0EkYAQmT9fAEJ/poFC63o=
 github.com/mattn/go-runewidth v0.0.2/go.mod h1:LwmH8dsx7+W8Uxz3IHJYH5QSwggIsqBzpuz5H//U1FU=
 github.com/mitchellh/go-wordwrap v0.0.0-20150314170334-ad45545899c7 h1:DpOJ2HYzCv8LZP15IdmG+YdwD2luVPHITV96TkirNBM=
 github.com/mitchellh/go-wordwrap v0.0.0-20150314170334-ad45545899c7/go.mod h1:ZXFpozHsX6DPmq2I0TCekCxypsnAUbP2oI0UX1GXzOo=
 github.com/nsf/termbox-go v0.0.0-20190121233118-02980233997d h1:x3S6kxmy49zXVVyhcnrFqxvNVCBPb2KZ9hV2RBdS840=
 github.com/nsf/termbox-go v0.0.0-20190121233118-02980233997d/go.mod h1:IuKpRQcYE1Tfu+oAQqaLisqDeXgjyyltCfsaoYN18NQ=
-golang.org/x/arch v0.0.0-20181203225421-5a4828bb7045 h1:Pn8fQdvx+z1avAi7fdM2kRYWQNxGlavNDSyzrQg2SsU=
-golang.org/x/arch v0.0.0-20181203225421-5a4828bb7045/go.mod h1:cYlCBUl1MsqxdiKgmc4uh7TxZfWSFLOGSRR090WDxt8=