Merge pull request #87 from infinytum/master

Add Double Linestyle

draw/border_test.go

@@ -92,6 +92,37 @@ func TestBorder(t *testing.T) {
 				return ft
 			},
 		},
+		{
+			desc:   "draws double border around the canvas",
+			canvas: image.Rect(0, 0, 4, 4),
+			border: image.Rect(0, 0, 4, 4),
+			opts: []BorderOption{
+				BorderLineStyle(LineStyleDouble),
+			},
+			want: func(size image.Point) *faketerm.Terminal {
+				ft := faketerm.MustNew(size)
+				c := testcanvas.MustNew(ft.Area())
+
+				testcanvas.MustSetCell(c, image.Point{0, 0}, lineStyleChars[LineStyleDouble][topLeftCorner])
+				testcanvas.MustSetCell(c, image.Point{0, 1}, lineStyleChars[LineStyleDouble][vLine])
+				testcanvas.MustSetCell(c, image.Point{0, 2}, lineStyleChars[LineStyleDouble][vLine])
+				testcanvas.MustSetCell(c, image.Point{0, 3}, lineStyleChars[LineStyleDouble][bottomLeftCorner])
+
+				testcanvas.MustSetCell(c, image.Point{1, 0}, lineStyleChars[LineStyleDouble][hLine])
+				testcanvas.MustSetCell(c, image.Point{1, 3}, lineStyleChars[LineStyleDouble][hLine])
+
+				testcanvas.MustSetCell(c, image.Point{2, 0}, lineStyleChars[LineStyleDouble][hLine])
+				testcanvas.MustSetCell(c, image.Point{2, 3}, lineStyleChars[LineStyleDouble][hLine])
+
+				testcanvas.MustSetCell(c, image.Point{3, 0}, lineStyleChars[LineStyleDouble][topRightCorner])
+				testcanvas.MustSetCell(c, image.Point{3, 1}, lineStyleChars[LineStyleDouble][vLine])
+				testcanvas.MustSetCell(c, image.Point{3, 2}, lineStyleChars[LineStyleDouble][vLine])
+				testcanvas.MustSetCell(c, image.Point{3, 3}, lineStyleChars[LineStyleDouble][bottomRightCorner])
+
+				testcanvas.MustApply(c, ft)
+				return ft
+			},
+		},
 		{
 			desc:   "draws border in the canvas",
 			canvas: image.Rect(0, 0, 4, 4),

draw/line_style.go

@@ -39,6 +39,19 @@ var lineStyleChars = map[LineStyle]map[linePart]rune{
 		vAndRight:         '├',
 		vAndH:             '┼',
 	},
+	LineStyleDouble: {
+		hLine:             '═',
+		vLine:             '║',
+		topLeftCorner:     '╔',
+		topRightCorner:    '╗',
+		bottomLeftCorner:  '╚',
+		bottomRightCorner: '╝',
+		hAndUp:            '╩',
+		hAndDown:          '╦',
+		vAndLeft:          '╣',
+		vAndRight:         '╠',
+		vAndH:             '╬',
+	},
 }
 
 // init verifies that all line parts are half-width runes (occupy only one
@@ -75,13 +88,15 @@ func (ls LineStyle) String() string {
 
 // lineStyleNames maps LineStyle values to human readable names.
 var lineStyleNames = map[LineStyle]string{
-	LineStyleLight: "LineStyleLight",
+	LineStyleLight:  "LineStyleLight",
+	LineStyleDouble: "LineStyleDouble",
 }
 
 // Supported line styles.
 const (
 	LineStyleNone LineStyle = iota
 	LineStyleLight
+	LineStyleDouble
 )
 
 // linePart identifies individual line parts.