From a2bf8545d73621de7cfa3a06663d1b94fdc668c4 Mon Sep 17 00:00:00 2001
From: KatolaZ <katolaz@freaknet.org>
Date: Fri, 19 Jul 2019 15:38:14 +0100
Subject: fix arrow pointer -- toggle start and end markers

---
 TODO       |  4 +++-
 gramscii.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++------------
 2 files changed, 54 insertions(+), 13 deletions(-)

diff --git a/TODO b/TODO
index e9d7819..1b6139d 100644
--- a/TODO
+++ b/TODO
@@ -1,13 +1,15 @@
 + optimize redraws (i.e., avoid to redraw if possible)
 - (?) change cursor shape according to action
 - save to file
-- implement arrow
+- implement auto-arrow 'A' (automatic end-char)
+- implement delete 'x' or 'd' 
 - manage special chars (DEL/CANC) during text insert
   (also do not print unmanaged chars!)
 - load from file
 - insert file at position
 - get screen geometry
 - allow scrolling (both vertical and horizontal)
+* implement arrow
 * set different line styles (done for hl, vl, corner)
 * add status bar
 * implement box
diff --git a/gramscii.c b/gramscii.c
index 2cc7213..1d75b34 100644
--- a/gramscii.c
+++ b/gramscii.c
@@ -23,6 +23,8 @@
 #define DIR_D  0x04
 #define DIR_L  0x08
 
+#define DIR_HOR (DIR_R | DIR_L)
+#define DIR_VER (DIR_D | DIR_U)
 
 #define WIDTH  100
 #define HEIGHT  25
@@ -54,12 +56,20 @@ char corner;
 char hlines[]  = {"-~=#@._ "};
 char vlines[]  = {"|H#@:;i "};
 char corners[] = {"+'H#@.\""};
+char st_marks[] = {"+o-|<>^v"};
+char end_marks[] = {">+o-|<^v"};
+
 int hlines_sz= sizeof(hlines) -1;
 int vlines_sz= sizeof(vlines) -1;
 int corners_sz = sizeof(corners) -1;
-int cur_hl, cur_vl, cur_corn;
+int stmarks_sz = sizeof(st_marks) - 1;
+int endmarks_sz = sizeof(st_marks) - 1;
+
+int cur_hl, cur_vl, cur_corn, cur_start, cur_end;
 char line_h;
 char line_v;
+char mark_st;
+char mark_end;
 
 struct termios t1, t2;
 
@@ -99,8 +109,11 @@ void init_screen(){
 	cur_corn = 0;
 	corner = corners[0];
 	cur_hl = cur_vl = 0;
+	cur_start = cur_end = 0;
 	line_h = hlines[cur_hl];
 	line_v = vlines[cur_vl];
+	mark_st = st_marks[cur_start];
+	mark_end = end_marks[cur_end];
 }
 
 char* state_str(){
@@ -123,8 +136,8 @@ char* state_str(){
 void status_bar(){
 	
 	printf("\033[%d;1f\033[7m", HEIGHT+1);
-	printf(" x: %3d y: %3d -- mode: %4s hl: %c vl: %c cn: %c %10s", 
-		x, y, state_str(), line_h, line_v, corner, "");
+	printf(" x: %3d y: %3d -- mode: %4s hl: %c vl: %c cn: %c <: %c >: %c %10s", 
+		x, y, state_str(), line_h, line_v, corner, mark_st, mark_end, "");
 
 	printf("\033[0m");
 }
@@ -297,12 +310,9 @@ int progr_y(int dir){
 }
 
 
-/* FIXME: fix pointer position */
-/* FIXME: set initial and final markers */
-/* FIXME: draw "corner" as first char after change of dir */
 void draw_arrow(int x, int y, char *a, int a_len, int fix){
 
-	int i, j;
+	int i, j, cur_dir;
 	char line;
 	void (*f)(int, int, char);
 
@@ -312,20 +322,31 @@ void draw_arrow(int x, int y, char *a, int a_len, int fix){
 	else
 		f = draw_xy;
 
+	f(x,y,mark_st);
 	if (!a_len){
-		f(x,y,corner);
+		show_cursor();
 		return;
 	}
-	line = (a[0] & DIR_L) || (a[0] & DIR_R) ? line_h : line_v;
-	f(x,y,line);
+	cur_dir=DIR_N;
 	for (i=0; i<a_len; i+=2){
+		if (i>0) {
+			/* If we are switching between horizontal and vertical, put a "corner" */
+			if (((cur_dir & DIR_HOR) && (a[i] & DIR_VER)) ||
+			    ((cur_dir & DIR_VER) && (a[i] & DIR_HOR))){
+				f(x,y,corner);
+				show_cursor();
+			}
+		}
 		for(j=0; j<a[i+1]; j++){
 			line = (a[i] & DIR_L) || (a[i] & DIR_R) ? line_h : line_v;
 			x += progr_x(a[i]);
 			y += progr_y(a[i]);
 			f(x, y, line); 
 		}
+		/* f(x,y,mark_end);*/
+		cur_dir = a[i];
 	}
+	f(x,y,mark_end);
 	show_cursor();
 }
 
@@ -345,7 +366,7 @@ void get_arrow(){
 	
 	redraw();
 	step = 1;
-	//draw_arrow(x,y,NOFIX);
+	draw_arrow(x,y, arrow, 0, NOFIX);
 	while((c=getchar())!=EOF && c != 27 && c!= 'a'){
 		switch(c){
 			case 'H': step = 5;
@@ -417,6 +438,18 @@ void toggle_vline(){
 
 }
 
+void toggle_st_mark(){
+	
+	cur_start = (cur_start + 1 ) % stmarks_sz;
+	mark_st = st_marks[cur_start];
+}
+
+void toggle_end_mark(){
+	
+	cur_end = (cur_end+ 1 ) % endmarks_sz;
+	mark_end = end_marks[cur_end];
+}
+
 void commands(){
 
 	char c;
@@ -467,9 +500,15 @@ void commands(){
 			case '|':
 				toggle_vline();
 				break;
-			case '+':
+			case '+': 
 				toggle_corner();
 				break;
+			case '<': 
+				toggle_st_mark();
+				break;
+			case '>':
+				toggle_end_mark();
+				break;
 			case 'Q':
 			case 'q':
 				cleanup(0);
-- 
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