From 0adbc2a776c36b736bb5acb7184ba559d9428bc4 Mon Sep 17 00:00:00 2001
From: KatolaZ <katolaz@freaknet.org>
Date: Fri, 26 Jul 2019 22:13:33 +0100
Subject: towards dynamic screen management

---
 Makefile   |  5 +++--
 TODO       |  3 +--
 gramscii.c | 67 +++++++++++++++++++++++++++++++++++++++++---------------------
 3 files changed, 48 insertions(+), 27 deletions(-)

diff --git a/Makefile b/Makefile
index a59ead3..55959ce 100644
--- a/Makefile
+++ b/Makefile
@@ -17,8 +17,9 @@ options:
 	@echo "-+-+-+-+-+-+-+-+-+-+-" 
 	
 
-gramscii: ${INC}
-
+gramscii: ${SRC} ${INC}
+	$(CC) $(CFLAGS) -o gramscii ${SRC}
+	
 clean:
 	@echo cleaning
 	@rm -f $(SRC:.c=)
diff --git a/TODO b/TODO
index f6087c7..7b324b8 100644
--- a/TODO
+++ b/TODO
@@ -1,5 +1,5 @@
 + optimize redraws (redraw only the modified rectangle)
-- change screen management (i.e., dynamic array of lines)
++ change screen management (i.e., dynamic array of lines)
 - add screen geometry option (-g 25x80?)
 - read file at point
   - read output of command (!)
@@ -48,4 +48,3 @@
 * set different line styles (done for hl, vl, corner)
 * add status bar
 * implement box
- 
diff --git a/gramscii.c b/gramscii.c
index 3bed08b..8a89fc9 100644
--- a/gramscii.c
+++ b/gramscii.c
@@ -33,6 +33,13 @@
 
 #include "arg.h"
 
+typedef struct{
+	int sz;
+	int lst;
+	char *s;
+} line_t;
+
+
 #define MOVE   0x00
 #define BOX    0x01
 #define ARROW  0x02
@@ -71,9 +78,10 @@
 #define MIN(x,y)  (x) < (y) ? (x) : (y)
 #define MAX(x,y)  (x) > (y) ? (x) : (y)
 
-/** #define DEBUG 1 **/
+#define DEBUG 1 
 
-char **screen;
+line_t *screen;
+int num_lines;
 int WIDTH, HEIGHT;
 
 int state;
@@ -113,7 +121,7 @@ struct termios t1, t2, t3;
 void dump_lines(){
 	int i;
 	for (i=0; i<HEIGHT; i++){
-		printf("%s\n", screen[i]);
+		printf("%s\n", screen[i].s);
 	}
 }
 
@@ -179,7 +187,7 @@ void status_bar(){
 	else
 		printf(" *%s*", fname );
 #ifdef DEBUG
-	printf("  '%d'  ", screen[y][x]);
+	printf("  '%d'  ", screen[y].s[x]);
 #endif
 	printf("\033[0m");
 	fflush(stdout);
@@ -232,13 +240,24 @@ void show_cursor(){
 	fflush(stdout);
 }
 
-void set_cur(char c){
-	screen[y][x] = c;
-}
 
-void set_xy(int x, int y, char c){
+void set_xy(int _x, int _y, char c){
 	/* FIXME: check if x and y are valid!!!! */
-	screen[y][x] = c;
+	if (screen[_y].sz < _x + 2){
+		screen[_y].sz = (_x +2) * 2;
+		screen[_y].s = realloc(screen[_y].s, screen[_y].sz * sizeof(char));
+	}
+	while (screen[_y].lst<_x){
+		screen[_y].s[screen[_y].lst] = BG;
+		screen[_y].lst += 1;
+	}
+	screen[_y].s[_x] = c;
+	if (_x == screen[_y].lst)
+		screen[_y].s[_x+1] = '\0';
+}
+
+void set_cur(char c){
+	set_xy(x, y, c);
 }
 
 void draw_xy(int x, int y, char c){
@@ -254,7 +273,7 @@ void update_current(){
 	if (silent)
 		return;
 	printf("\033[%d'%df",y+1,x+1);
-	putchar(screen[y][x]);
+	putchar(screen[y].s[x]);
 	fflush(stdout);
 }
 
@@ -282,7 +301,7 @@ void erase_box(int x1, int y1, char c){
 void erase_screen(){
 	int i;
 	for(i=0;i<HEIGHT; i++)
-		erase_line(screen[i]);
+		erase_line(screen[i].s);
 }
 
 void check_bound(){
@@ -311,7 +330,7 @@ void redraw(){
 		return;
 	printf("\033[2J\033[1;1H");
 	for (i=0;i<HEIGHT;i++){
-		fprintf(stdout,"%s\n",screen[i]);
+		fprintf(stdout,"%s\n",screen[i].s);
 	}
 	status_bar();
 	show_cursor();
@@ -774,7 +793,7 @@ void write_file(FILE *fc){
 		return;
 	}
 	for (i=0; i<HEIGHT; i++){
-		fprintf(fout, "%s\n", screen[i]);
+		fprintf(fout, "%s\n", screen[i].s);
 	}
 	fclose(fout);
 	modified = 0;
@@ -800,10 +819,10 @@ void load_file(FILE *fc){
 	get_string(fc, "Load file: ", newfname, 255);
 	if ((fin=fopen(newfname, "r")) != NULL){
 		i = 0;
-		while((fgets(screen[i], WIDTH+2, fin)) != NULL && i<HEIGHT)
-			screen[i++][WIDTH-1]='\0';
+		while((fgets(screen[i].s, WIDTH+2, fin)) != NULL && i<HEIGHT)
+			screen[i++].s[WIDTH-1]='\0';
 		for(;i<HEIGHT; i++){
-			erase_line(screen[i]);
+			erase_line(screen[i].s);
 		}
 		fclose(fin);
 	}
@@ -872,24 +891,26 @@ void init_screen(){
 		WIDTH=80;
 		HEIGHT=24;
 	}
-	screen = malloc(HEIGHT * sizeof(char *));
+	screen = malloc(HEIGHT * sizeof(line_t));
+	num_lines = HEIGHT;
 	if (screen == NULL){
 		perror("allocating screen");
 		exit(1);
 	}
 	for (i=0; i<HEIGHT; i++){
-		screen[i] = malloc((WIDTH+1) * sizeof(char));
-		if (screen[i] == NULL){
-			perror("allocating screen[i]");
+		screen[i].sz = WIDTH+1;
+		screen[i].s = malloc((screen[i].sz) * sizeof(char));
+		if (screen[i].s == NULL){
+			perror("allocating screen[i].s");
 			exit(1);
 		}
-		memset(screen[i], ' ', WIDTH * sizeof(char));
-		screen[i][WIDTH]='\0';
+		memset(screen[i].s, BG, screen[i].sz);
+		screen[i].lst = WIDTH;
+		screen[i].s[screen[i].lst+1]='\0';
 	}
 	reset_styles();
 }
 
-
 void init(){
 
 	signal(SIGHUP, cleanup);
-- 
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