From ed3067a9a023cc101e29509ad57890edc949d5c2 Mon Sep 17 00:00:00 2001
From: "Tobias P.L Wennberg" <t@wenn.homes>
Date: Tue, 14 Jan 2025 10:39:22 +0100
Subject: [PATCH] Better input, now with ctrl

---
 input_parser/escape_handler.go | 76 +++++++++++++++++++++++++---------
 input_parser/input_parser.go   | 29 ++++++++++++-
 2 files changed, 83 insertions(+), 22 deletions(-)

diff --git a/input_parser/escape_handler.go b/input_parser/escape_handler.go
index d2f8b68..4c586d4 100644
--- a/input_parser/escape_handler.go
+++ b/input_parser/escape_handler.go
@@ -3,18 +3,19 @@ package input_parser
 import (
 	"bbash/environment"
 	"bufio"
+	"fmt"
+	"strings"
 )
 
 func Escape_handler(reader *bufio.Reader, history_index int, input string, env environment.Env, cursor int) (string, int, int) {
 	next_rune, _, _ := reader.ReadRune()
-	//fmt.Print(next_rune)
+	if next_rune == 59 {
+	}
 	if next_rune != 91 { // not "["
 		return "", history_index, cursor
 	}
 	next_rune, _, _ = reader.ReadRune()
 
-	//fmt.Println("print" + strconv.QuoteRune(next_rune))
-
 	switch next_rune {
 	case 65: //A
 		if history_index > 0 {
@@ -45,25 +46,60 @@ func Escape_handler(reader *bufio.Reader, history_index int, input string, env e
 		if cursor < len(input) {
 			cursor++
 		}
-	}
-
-	/* if r, _, _ := reader.ReadRune(); r == 65 { // UPP
-		if history_index > 0 {
-			history_index--
-			input = env.History[history_index]
-		}
-		break
+	case 49:
+		cursor = ctrl(reader, input, cursor)
+		return input, history_index, cursor
 
 	}
-	if r, _, _ := reader.ReadRune(); r != 66 { //DOWN
-		if history_index < len(env.History)-1 {
-			history_index++
-			input = env.History[history_index]
-		} else {
-			input = ""
-		}
-		break
-	} */
+
 
 	return input, history_index, cursor
 }
+func ctrl(reader *bufio.Reader, input string, cursor int) int {
+	next_rune, _, err := reader.ReadRune()
+	if err != nil {
+		fmt.Println(err.Error())
+		return cursor
+	}
+	if next_rune != 59 {
+		return cursor
+	}
+	next_rune, _, err = reader.ReadRune()
+	if err != nil {
+		fmt.Println(err.Error())
+		return cursor
+	}
+	if next_rune != 53 {
+		return cursor
+	}
+	next_rune, _, err = reader.ReadRune()
+	if err != nil {
+		fmt.Println(err.Error())
+		return cursor
+	}
+	switch next_rune {
+	case 68: // ctrl left
+		input_at := input[:cursor]
+		last_index := strings.LastIndex(input_at, " ")
+		if last_index == -1 {
+			cursor = 0
+		} else {
+			input_at = input_at[:last_index]
+			cursor = len(input_at)
+		}
+	case 67: // ctrl right
+		input_next := input[cursor:]
+		next_trimmed := strings.TrimLeft(input_next, " ")
+		last_index := strings.Index(next_trimmed, " ")
+		if last_index == -1 {
+			cursor = len(input)
+		} else {
+			cursor = cursor + last_index + (len(input_next) - len(next_trimmed))
+		}
+	}
+	return cursor
+	
+
+
+}
+
diff --git a/input_parser/input_parser.go b/input_parser/input_parser.go
index 7c97715..c9a4eb5 100644
--- a/input_parser/input_parser.go
+++ b/input_parser/input_parser.go
@@ -86,6 +86,12 @@ func input_str(env *environment.Env) string {
 	fmt.Print(input)
 
 	for {
+		if cursor > len(input) {
+			cursor = len(input)
+		}
+		if cursor < 0 {
+			cursor = 0
+		}
 		r_rune, _, err := reader.ReadRune()
 		if err != nil {
 			fmt.Print(fmt.Sprintf("Error reading user input: %s", err.Error()))
@@ -98,21 +104,40 @@ func input_str(env *environment.Env) string {
 		case 4: // ^D
 			input = "exit"
 			goto loop_exit
+		case 8:  // <CTR><BACKSPACE>
+			input_at := input[:cursor]
+			input_after := input[cursor:]
+			last_index := strings.LastIndex(input_at, " ")
+			if last_index == -1 {
+				input_at = ""
+				cursor = 0
+			} else {
+				input_at = input_at[:last_index]
+				cursor = len(input_at)
+			}
+			input = input_at+input_after
+		
 		case 9: // TAB
 			input = AutoComplete(input)
 			cursor = len(input)
 		case 27: // Escape
 			input, history_index, cursor = Escape_handler(reader, history_index, input, *env, cursor)
 		case 127: //packspace
+			input_at := input[:cursor]
+			input_after := input[cursor:]
 			if len(input) > 0 {
-				input = input[:len(input)-1]
+				input_at = input_at[:len(input_at)-1]
 				cursor--
 			}
+			input=input_at+input_after
 		case 13: // Enter
 			goto loop_exit
 		default:
+			input_at := input[:cursor]
+			input_after := input[cursor:]
+			input_at += string(r_rune)
+			input = input_at+input_after
 			cursor++
-			input = input + string(r_rune)
 		}
 		ghost_input := AutoCompleteHistory(input, *env)