edbox: add editing keys, do NOT include EOL in buffer.

1 files changed, 41 insertions, 7 deletions

diff --git a/src/edbox.c b/src/edbox.c
index 4492308..9231b50 100644
--- a/src/edbox.c
+++ b/src/edbox.c
@@ -9,6 +9,7 @@
 
 // static int edbox_visible = 0; /* don't think we'll ever need it */
 static u16 edbox_pos; /* range 0 to EDBOX_SIZE - 1 */
+static u16 edbox_len; /* idem */
 
 void (*edbox_callback)(void);
 
@@ -22,7 +23,7 @@ static void show_cursor(void) {
 
 void edbox_clear(void) {
 	memset(edit_box, 0, EDBOX_SIZE);
-	edbox_pos = 0;
+	edbox_pos = edbox_len = 0;
 	show_cursor();
 }
 
@@ -49,17 +50,20 @@ void edbox_putc(char c) {
 		return; /* no inserting nulls */
 	if((c != CH_EOL) && (edbox_pos == EDBOX_SIZE - 1))
 		return;
+	memmove(edit_box + edbox_pos + 1, edit_box + edbox_pos, EDBOX_SIZE - edbox_pos - 1);
 	edit_box[edbox_pos++] = c;
+	edbox_len++;
 	edbox_show();
 }
 
 void edbox_append(char *s) {
 	while(*s)
 		edit_box[edbox_pos++] = *s++;
+	edbox_len = edbox_pos;
 }
 
 void edbox_preset(char *s) {
-	edbox_pos = 0;
+	edbox_clear();
 	edbox_append(s);
 }
 
@@ -96,14 +100,30 @@ static void special_keystroke(char c) {
 	edbox_putc(c);
 }
 
+static void del_char(void) {
+	if(!edbox_len) return;
+	memmove(edit_box + edbox_pos, edit_box + edbox_pos + 1, EDBOX_SIZE - edbox_pos - 1);
+	edbox_len--;
+}
+
 static void backspace(void) {
 	if(!edbox_pos) return;
-	hide_cursor();
-	edit_box[--edbox_pos] = 0;
-	edbox_show();
+	edbox_pos--;
+	del_char();
 }
 
 static void del_word(void) {
+	if(!edbox_pos) return;
+	edbox_pos--;
+	while(edbox_pos && edit_box[edbox_pos] == ' ') {
+		del_char();
+		edbox_pos--;
+	}
+	while(edbox_pos && edit_box[edbox_pos] != ' ') {
+		del_char();
+		edbox_pos--;
+	}
+	if(!edbox_pos) edit_box[edbox_pos] = ' ';
 }
 
 static void normal_keystroke(void) {
@@ -113,7 +133,6 @@ static void normal_keystroke(void) {
 
 	switch(c) {
 		case CH_EOL:
-			edbox_putc(c);
 			hide_cursor();
 			if(edbox_callback)
 				(*edbox_callback)();
@@ -131,6 +150,21 @@ static void normal_keystroke(void) {
 		case 0x17: /* ^W */
 			del_word();
 			break;
+		case CH_CURS_LEFT:
+			if(edbox_pos) edbox_pos--;
+			break;
+		case CH_CURS_RIGHT:
+			if(edbox_pos < edbox_len) edbox_pos++;
+			break;
+		case CH_DELCHR:
+			del_char();
+			break;
+		case 0x01: /* ^A */
+			edbox_pos = 0;
+			break;
+		case 0x05: /* ^E */
+			edbox_pos = edbox_len;
+			break;
 		default:
 			edbox_putc(c);
 			break;
@@ -143,8 +177,8 @@ void edbox_keystroke(void) {
 	while(OS.ch == 0xff)
 		;
 
-	hide_cursor();
 	edbox_show();
+	hide_cursor();
 
 	OS.invflg = c = 0;