Overwrite mode added, toggled with INSERTKEY

source/blender/blenkernel/BKE_text.h

@@ -81,6 +81,7 @@ void	txt_do_redo			(struct Text *text);
 void	txt_split_curline	(struct Text *text);
 void	txt_backspace_char	(struct Text *text);
 int		txt_add_char		(struct Text *text, char add);
+int		txt_replace_char	(struct Text *text, char add);
 void	txt_find_panel		(struct SpaceText *st, int again);
 void	run_python_script	(struct SpaceText *st);
 int	jumptoline_interactive	(struct SpaceText *st);

source/blender/blenkernel/intern/text.c

@@ -2140,6 +2140,34 @@ int txt_add_char (Text *text, char add)
 	return 1;
 }
 
+int txt_replace_char (Text *text, char add)
+{
+	char del;
+	
+	if (!text) return 0;
+	if (!text->curl) return 0;
+
+	/* If text is selected or we're at the end of the line just use txt_add_char */
+	if (text->curc==text->curl->len || text->sell!=text->curl || text->selc!=text->curc || add=='\n') {
+		return txt_add_char(text, add);
+	}
+	
+	del= text->curl->line[text->curc];
+	text->curl->line[text->curc]= (unsigned char) add;
+	text->curc++;
+	txt_pop_sel(text);
+	
+	txt_make_dirty(text);
+	txt_clean_text(text);
+
+	/* Should probably create a new op for this */
+	if(!undoing) {
+		txt_undo_add_charop(text, UNDO_DEL, del);
+		txt_undo_add_charop(text, UNDO_INSERT, add);
+	}
+	return 1;
+}
+
 void indent(Text *text)
 {
 	int len, num;

source/blender/makesdna/DNA_space_types.h

@@ -281,7 +281,7 @@ typedef struct SpaceText {
 	int tabnumber;
 	int currtab_set; 
 	int showsyntax;
-	int unused_padd;
+	int overwrite;
 	
 	float pix_per_line;
 

source/blender/src/drawtext.c

@@ -634,10 +634,11 @@ static void set_cursor_to_pos (SpaceText *st, int x, int y, int sel)
 }
 
 static void draw_cursor(SpaceText *st) {
-	int h, x, i;
+	int h, x, i, w;
 	Text *text= st->text;
 	TextLine *linef, *linel;
 	int charf, charl;
+	char ch[2];
 	
 	if (text->curl==text->sell && text->curc==text->selc) {
 		x= text_draw(st, text->curl->line, st->left, text->curc, 0, 0, 0, NULL);
@@ -645,9 +646,19 @@ static void draw_cursor(SpaceText *st) {
 		if (x) {
 			h= txt_get_span(text->lines.first, text->curl) - st->top;
 
-			BIF_ThemeColor(TH_HILITE);
-			
-			glRecti(x-1, curarea->winy-st->lheight*(h)-2, x+1, curarea->winy-st->lheight*(h+1)-2);
+			if (st->overwrite) {
+				ch[0]= (unsigned char) text->curl->line[text->curc];
+				if (ch[0]=='\0') ch[0]=' ';
+				ch[1]= '\0';
+				w= BMF_GetStringWidth(spacetext_get_font(st), ch);
+				BIF_ThemeColor(TH_SHADE2);
+				glRecti(x, curarea->winy-st->lheight*(h)-2, x+w, curarea->winy-st->lheight*(h+1)-2);
+				BIF_ThemeColor(TH_HILITE);
+				glRecti(x, curarea->winy-st->lheight*(h+1)-3, x+w, curarea->winy-st->lheight*(h+1)-1);
+			} else {
+				BIF_ThemeColor(TH_HILITE);
+				glRecti(x-1, curarea->winy-st->lheight*(h)-2, x+1, curarea->winy-st->lheight*(h+1)-2);
+			}
 		}
 	} else {
 		int span= txt_get_span(text->curl, text->sell);
@@ -1594,7 +1605,7 @@ void winqreadtextspace(ScrArea *sa, void *spacedata, BWinEvent *evt)
 			}
 		}
 	} else if (ascii) {
-		if (txt_add_char(text, ascii)) {
+		if ((st->overwrite && txt_replace_char(text, ascii)) || txt_add_char(text, ascii)) {
 			if (st->showsyntax) get_format_string(st);
 			pop_space_text(st);
 			do_draw= 1;
@@ -1894,6 +1905,10 @@ void winqreadtextspace(ScrArea *sa, void *spacedata, BWinEvent *evt)
 			pop_space_text(st);
 			st->currtab_set = setcurr_tab(text);
 			break;
+		case INSERTKEY:
+			st->overwrite= !st->overwrite;
+			do_draw= 1;
+			break;
 		case DOWNARROWKEY:
 			txt_move_down(text, G.qual & LR_SHIFTKEY);
 			set_tabs(text);

source/blender/src/space.c

@@ -6011,6 +6011,8 @@ static void init_textspace(ScrArea *sa)
 	st->lheight= 12;
 	st->showlinenrs= 0;
 	st->tabnumber = 4;
+	st->showsyntax= 0;
+	st->overwrite= 0;
 	st->currtab_set = 0;
 	
 	st->top= 0;