From d87cf8ea7ec68de924179eb1dbaa13f4b52bd1aa Mon Sep 17 00:00:00 2001
From: KatolaZ <katolaz@freaknet.org>
Date: Sat, 20 Jul 2019 14:47:12 +0100
Subject: visual mode (erase and fill)

---
 TODO       |  7 ++++---
 gramscii.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 70 insertions(+), 3 deletions(-)

diff --git a/TODO b/TODO
index 2119199..c84da67 100644
--- a/TODO
+++ b/TODO
@@ -2,11 +2,12 @@
 - (?) change cursor shape according to action
 - auto-arrow 'A' (automatic end-char)
 - read file at point
-- visual selection
++ visual selection
   - crop
-  - fill
-  - delete
   - yank/put
+  * fill
+  * delete
+- change screen management (i.e., use an array of lines)
 - undo (by storing lines changed across insert/remove operations)
 - manage special chars (DEL/CANC) during text insert
   (also do not print unmanaged chars!)
diff --git a/gramscii.c b/gramscii.c
index 8177d56..6676545 100644
--- a/gramscii.c
+++ b/gramscii.c
@@ -16,6 +16,7 @@
 #define ARROW  0x02
 #define TEXT   0x04
 #define DEL    0x08
+#define VIS    0x10
 
 #define DIR_N  0x00
 #define DIR_R  0x01
@@ -45,6 +46,9 @@
 #define END    0x02
 #define MIDDLE 0x04
 
+#define VIDEO_NRM 0
+#define VIDEO_REV 7 
+
 #define MIN(x,y)  (x) < (y) ? (x) : (y)
 #define MAX(x,y)  (x) > (y) ? (x) : (y)
 
@@ -188,6 +192,21 @@ void erase_line(char *s){
 	}
 }
 
+void erase_box(int x1, int y1, char c){
+
+	int x_incr, y_incr, i; 
+
+	x_incr = x1 < x? +1: -1;
+	y_incr = y1 < y? +1: -1;
+	do{
+		i = y1;
+		do{
+			set_xy(x1, i, c);
+		} while(i != y && (1 | (i += y_incr)));
+	} while(x1 != x && (1 | (x1 += x_incr)));
+	
+}
+
 void erase_screen(){
 	int i;
 	for(i=0;i<HEIGHT; i++)
@@ -297,6 +316,10 @@ int progr_y(int dir){
 	return dir == DIR_U ? -1 : dir == DIR_D ? 1: 0;
 }
 
+void set_video(int v){
+	printf("\033[%dm", v);
+}
+
 /*** Lines and markers ***/
 
 void toggle_hline(){
@@ -626,6 +649,45 @@ void new_file(){
 	modified=0;
 }
 
+/*** Visual ***/
+
+
+void visual_box(){
+	int orig_x =x, orig_y = y;
+	char c, f = BG;
+
+	redraw();
+	step = 1;
+	set_video(VIDEO_REV);
+	draw_box(x,y,NOFIX);
+	while((c=getchar())!=EOF && c != 27 && c!= 'v'){
+		if (!move_around(c)) switch(c){
+			case 'f':/* fill */
+				f = get_key("fill char: ");
+			case 'x':/* erase */
+				erase_box(orig_x, orig_y, f);
+				modified = 1;
+				goto vis_exit;
+				break;
+		} 
+		check_bound();
+		set_video(VIDEO_NRM);
+		redraw();
+		step = 1;
+		f = BG;
+		set_video(VIDEO_REV);
+		draw_box(orig_x, orig_y, NOFIX);
+		status_bar();
+		show_cursor();
+	}
+vis_exit:
+	set_video(VIDEO_NRM);
+	redraw();
+	state = MOVE;
+}
+
+
+
 /*** Commands ***/
 
 void commands(){
@@ -665,6 +727,10 @@ void commands(){
 				state = DEL;
 				delete();
 				break;
+			case 'v':
+				state = VIS;
+				visual_box();
+				break;
 			case '-':
 				toggle_hline();
 				break;
-- 
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