Adding missing DL CIS handler

Makefile

@@ -0,0 +1,15 @@
+BINARY := aminal
+VERSION ?= vlatest
+
+.PHONY: build
+build: test 
+	mkdir -p release
+	go build -o release/$(BINARY)-$(VERSION)
+
+.PHONY: test
+test:
+	go test -v ./...
+
+.PHONY: install
+install: build
+	install -m 0755 release/$(BINARY)-$(VERSION) /usr/local/bin/aminal

buffer/buffer.go

@@ -442,6 +442,11 @@ func (buffer *Buffer) ViewHeight() uint16 {
 	return buffer.viewHeight
 }
 
+func (buffer *Buffer) deleteLine() {
+	index := int(buffer.RawLine())
+	buffer.lines = buffer.lines[:index+copy(buffer.lines[index:], buffer.lines[index+1:])]
+}
+
 func (buffer *Buffer) insertLine() {
 
 	defer buffer.emitDisplayChange()
@@ -492,6 +497,21 @@ func (buffer *Buffer) InsertLines(count int) {
 
 }
 
+func (buffer *Buffer) DeleteLines(count int) {
+
+	if buffer.HasScrollableRegion() && !buffer.InScrollableRegion() {
+		// should have no effect outside of scrollable region
+		return
+	}
+
+	buffer.cursorX = 0
+
+	for i := 0; i < count; i++ {
+		buffer.deleteLine()
+	}
+
+}
+
 func (buffer *Buffer) Index() {
 
 	// This sequence causes the active position to move downward one line without changing the column position.

terminal/csi.go

@@ -41,6 +41,7 @@ var csiSequences = []csiMapping{
 	{id: 'J', handler: csiEraseInDisplayHandler, description: "Erase in Display (ED), VT100"},
 	{id: 'K', handler: csiEraseInLineHandler, description: "Erase in Line (EL), VT100"},
 	{id: 'L', handler: csiInsertLinesHandler, description: "Insert Ps Line(s) (default = 1) (IL)"},
+	{id: 'M', handler: csiDeleteLinesHandler, description: "Delete Ps Line(s) (default = 1) (DL)"},
 	{id: 'P', handler: csiDeleteHandler, description: " Delete Ps Character(s) (default = 1) (DCH)"},
 	{id: 'S', handler: csiScrollUpHandler, description: "Scroll up Ps lines (default = 1) (SU), VT420, ECMA-48"},
 	{id: 'T', handler: csiScrollDownHandler, description: "Scroll down Ps lines (default = 1) (SD), VT420"},
@@ -276,6 +277,24 @@ func csiInsertLinesHandler(params []string, intermediate string, terminal *Termi
 	return nil
 }
 
+func csiDeleteLinesHandler(params []string, intermediate string, terminal *Terminal) error {
+	count := 1
+	if len(params) > 1 {
+		return fmt.Errorf("Not supported")
+	}
+	if len(params) == 1 {
+		var err error
+		count, err = strconv.Atoi(params[0])
+		if err != nil || count < 1 {
+			count = 1
+		}
+	}
+
+	terminal.ActiveBuffer().DeleteLines(count)
+
+	return nil
+}
+
 func csiScrollDownHandler(params []string, intermediate string, terminal *Terminal) error {
 	distance := 1
 	if len(params) > 1 {

terminal/sgr.go

@@ -3,6 +3,7 @@ package terminal
 import (
 	"fmt"
 	"strconv"
+	"strings"
 
 	"github.com/liamg/aminal/buffer"
 	"github.com/liamg/aminal/config"
@@ -15,7 +16,10 @@ func sgrSequenceHandler(params []string, intermediate string, terminal *Terminal
 	}
 
 	for i := range params {
-		switch params[i] {
+
+		p := strings.Replace(strings.Replace(params[i], "[", "", -1), "]", "", -1)
+
+		switch p {
 		case "00", "0":
 			attr := terminal.ActiveBuffer().CursorAttr()
 			*attr = buffer.CellAttributes{
@@ -38,6 +42,8 @@ func sgrSequenceHandler(params []string, intermediate string, terminal *Terminal
 			terminal.ActiveBuffer().CursorAttr().Bold = false
 		case "22":
 			terminal.ActiveBuffer().CursorAttr().Dim = false
+		case "23":
+			// not italic
 		case "24":
 			terminal.ActiveBuffer().CursorAttr().Underline = false
 		case "25":
@@ -46,6 +52,8 @@ func sgrSequenceHandler(params []string, intermediate string, terminal *Terminal
 			terminal.ActiveBuffer().CursorAttr().Reverse = false
 		case "28":
 			terminal.ActiveBuffer().CursorAttr().Hidden = false
+		case "29":
+			// not strikethrough
 		case "39":
 			terminal.ActiveBuffer().CursorAttr().FgColour = terminal.config.ColourScheme.Foreground
 		case "30":