From 82a7c12e8338288ccb40d213fcc9e15d102aa968 Mon Sep 17 00:00:00 2001
From: KatolaZ <katolaz@freaknet.org>
Date: Thu, 1 Aug 2019 16:42:36 +0100
Subject: remove trailing blank lines in write_file - change check_bound

---
 draw.c     | 33 +++++++++++++++++----------------
 files.c    | 14 +++++++++++---
 gramscii.h |  6 ++++--
 lineset.c  |  9 +++++++--
 main.c     |  2 +-
 screen.c   | 14 +++++++-------
 6 files changed, 47 insertions(+), 31 deletions(-)

diff --git a/draw.c b/draw.c
index ae90458..1c383fa 100644
--- a/draw.c
+++ b/draw.c
@@ -94,7 +94,7 @@ void get_text(FILE *fc){
 			if (x >= WIDTH)
 				x = orig_x;
 		}
-		check_bound();
+		check_bound(&x, &y);
 		status_bar();
 		show_cursor();
 	}
@@ -150,7 +150,7 @@ void get_box(FILE *fc){
 			goto update_box;
 		if (!move_around(c, fc)) 
 			continue;
-		check_bound();
+		check_bound(&x, &y);
 		redraw();
 		step = 1;
 update_box:
@@ -166,19 +166,19 @@ update_box:
 	mode = MOVE;
 }
 
-void draw_arrow(int x, int y, char *a, int a_len, int fix){
+void draw_arrow(int xl, int yl, char *a, int a_len, int fix){
 
 	int i, j, cur_dir;
 	char line;
 	void (*f)(int, int, char);
 
-	a_miny = a_maxy = y;
+	a_miny = a_maxy = yl;
 	if (fix == FIX)
 		f = set_xy;
 	else
 		f = draw_xy;
 
-	f(x,y,mark_st);
+	f(xl, yl, mark_st);
 	if (!a_len){
 		show_cursor();
 		return;
@@ -189,27 +189,28 @@ void draw_arrow(int x, int y, char *a, int a_len, int fix){
 			/* 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);
+				f(xl, yl, 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]);
-			if (y < a_miny) a_miny = y;
-			if (y > a_maxy) a_maxy = y;
-			f(x, y, line);
+			xl += progr_x(a[i]);
+			yl += progr_y(a[i]);
+			check_bound(&xl, &yl);
+			if (yl < a_miny) a_miny = yl;
+			if (yl > a_maxy) a_maxy = yl;
+			f(xl, yl, line);
 		}
 		/* f(x,y,mark_end);*/
 		cur_dir = a[i];
 	}
 	if (autoend){
 		if (cur_dir != DIR_N)
-			f(x,y, get_mark(cur_dir));
+			f(xl,yl, get_mark(cur_dir));
 	}
 	else 
-		f(x,y,mark_end);
+		f(xl,yl,mark_end);
 	show_cursor();
 }
 
@@ -235,7 +236,7 @@ void get_arrow(FILE *fc){
 			goto update_arrow;
 		if (!move_around(c, fc))
 			continue;
-		check_bound();
+		check_bound(&x, &y);
 		/* FIXME: if we are out of bound, do nothing? */
 		if (arrow_len == arrow_sz){
 			arrow_sz *=2;
@@ -289,7 +290,7 @@ void erase(FILE *fc){
 	show_cursor();
 	while((c=fgetc(fc))!=EOF && c!=27 && c!= 'x' && c != '\n'){
 		if (!move_around(c, fc)) continue;
-		check_bound();
+		check_bound(&x, &y);
 		if (first || 
 		    (y != orig_y && ! opened) ||
 		    (y == orig_y && x != orig_x && !opened) ){
@@ -354,7 +355,7 @@ void visual_box(FILE *fc){
 				goto vis_exit;
 				break;
 		} 
-		check_bound();
+		check_bound(&x, &y);
 		set_video(VIDEO_NRM);
 		redraw();
 		step = 1;
diff --git a/files.c b/files.c
index 17743a5..dfeb3b2 100644
--- a/files.c
+++ b/files.c
@@ -7,7 +7,7 @@
 
 void write_file(FILE *fc){
 	FILE *fout;
-	int i;
+	int i, ne;
 
 	if (!fname[0] || force_new){
 		get_string(fc, "Write to: ", fname, 255);
@@ -23,8 +23,16 @@ void write_file(FILE *fc){
 		get_key(fc, "Error opening file.");
 		return;
 	}
+	ne = 0;
 	for (i=0; i<HEIGHT; i++){
-		fprintf(fout, "%s\n", screen.l[i].s);
+		if (strlen(screen.l[i].s)){/* remove trailing blank lines */
+			/* put the empty lines preceeding the current non-empty one */
+			while (ne--)
+				fprintf(fout, "\n");
+			fprintf(fout, "%s\n", screen.l[i].s);
+			ne = 0;
+		}
+		else ne++;
 	}
 	fclose(fout);
 	modified = 0;
@@ -51,7 +59,7 @@ void load_file(FILE *fc){
 	if ((fin=fopen(newfname, "r")) != NULL){
 		i = 0;
 		while((fgets(screen.l[i].s, WIDTH+1, fin)) != NULL && i<HEIGHT){
-			screen.l[i].lst = strlen(screen.l[i].s) - 1;
+			screen.l[i].lst = strlen(screen.l[i].s) - 2;
 			screen.l[i].n = i;
 			screen.l[i].s[strlen(screen.l[i].s)-1]='\0';
 			i++;
diff --git a/gramscii.h b/gramscii.h
index 0792a38..6fcbb99 100644
--- a/gramscii.h
+++ b/gramscii.h
@@ -82,7 +82,9 @@ typedef struct{
 #define progr_x(d) ((d) == DIR_L ? -1 : (d) == DIR_R ? 1 : 0)
 #define progr_y(d) ((d) == DIR_U ? -1 : (d) == DIR_D ? 1 : 0)
 
-#define DEBUG 1
+/*
+ * #define DEBUG 1
+ */
 
 /** global variables **/ 
 
@@ -139,7 +141,7 @@ struct termios t1, t2, t3;
 void reset_styles();
 void redraw();
 int move_around(char c, FILE *fc);
-void check_bound();
+void check_bound(int *x, int *y);
 void status_bar();
 void show_cursor();
 void set_cur(char c);
diff --git a/lineset.c b/lineset.c
index 0d810b8..349504c 100644
--- a/lineset.c
+++ b/lineset.c
@@ -144,13 +144,18 @@ void copy_lines_to_ring(int y1, int y2, int which){
 	else
 		idx = undo_cur + 1;
 	if (idx >= undo_sz - 1){
-		undo_sz += 10;
-		tmp = realloc(undo, undo_sz * sizeof(lineset_t));
+		tmp = realloc(undo, (undo_sz + 10) * sizeof(lineset_t));
 		if (tmp == NULL){
 			fprintf(stderr, "Error allocating undo buffer");
 			exit(1);
 		}
 		undo = tmp;
+		for (i=0; i<10; i++){
+			undo[undo_sz + i].sz = 0;
+			undo[undo_sz + i].l = NULL;
+			undo[undo_sz + i].num = 0;
+		}
+		undo_sz += 10;
 	}
 	ensure_num_lines(&(undo[idx]), y2 - y1 + 1);
 	for(i=y1; i<=y2; i++){
diff --git a/main.c b/main.c
index 4118ecc..ea8a4fc 100644
--- a/main.c
+++ b/main.c
@@ -135,7 +135,7 @@ void commands(FILE *fc){
 					break;
 			}
 		}
-		check_bound();
+		check_bound(&x, &y);
 		status_bar();
 		show_cursor();
 		step = 1;
diff --git a/screen.c b/screen.c
index c27ab8b..8e1b8bc 100644
--- a/screen.c
+++ b/screen.c
@@ -196,11 +196,11 @@ void erase_screen(){
 		erase_line(i);
 }
 
-void check_bound(){
-	if (x<0) x=0;
-	else if (x>=WIDTH) x = WIDTH-1;
-	if (y<0) y=0;
-	else if (y>=HEIGHT) y = HEIGHT -1;
+void check_bound(int *x, int *y){
+	if (*x<0) *x=0;
+	else if (*x>=WIDTH) *x = WIDTH-1;
+	if (*y<0) *y=0;
+	else if (*y>=HEIGHT) *y = HEIGHT -1;
 }
 
 void reset_styles(){
@@ -242,7 +242,7 @@ void go_to(int where){
 			y = HEIGHT/2;
 			break;
 	}
-	check_bound();
+	check_bound(&x, &y);
 	show_cursor();
 }
 
@@ -279,7 +279,7 @@ void handle_goto(){
 			go_to(MIDDLE);
 			break;
 	}
-	check_bound();
+	check_bound(&x, &y);
 	show_cursor();
 }
 
-- 
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