From 8e3d23b921d9bbcb7c53017bacff8a3050a34b55 Mon Sep 17 00:00:00 2001
From: KatolaZ <katolaz@freaknet.org>
Date: Sat, 27 Jul 2019 06:57:12 +0100
Subject: reorganise code

---
 screen.c | 419 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 419 insertions(+)
 create mode 100644 screen.c

(limited to 'screen.c')

diff --git a/screen.c b/screen.c
new file mode 100644
index 0000000..2e61acf
--- /dev/null
+++ b/screen.c
@@ -0,0 +1,419 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <termios.h>
+#include <sys/ioctl.h>
+
+#include "gramscii.h"
+#include "config.h"
+
+/*** screen management functions ***/
+
+
+/*** Status bar ***/
+
+char* mode_str(){
+	switch(mode){
+		case MOVE:
+			return "mov";
+		case TEXT:
+			return "txt";
+		case BOX:
+			return "box";
+		case ARROW:
+			return "arr";
+		case DEL:
+			return "del";
+		case VIS:
+			return "vis";
+		default:
+			return "ERR";
+	}
+	return "ERR";
+}
+
+char get_mark(char dir){
+	switch(dir){
+		case DIR_U:
+			return '^';
+		case DIR_D:
+			return 'v';
+		case DIR_L:
+			return '<';
+		case DIR_R:
+			return '>';
+	}
+	return '>';
+}
+
+
+void status_bar(){
+
+	if (silent)
+		return;
+	printf("\033[%d;1f\033[7m", HEIGHT+1);
+	printf("%*s", WIDTH-1, "");
+	printf("\033[%d;1f\033[7m", HEIGHT+1);
+	printf(" x:%3d y:%3d -- MODE:%4s HL:%c VL:%c CN:%c SP:%c EP:%c %10s",
+		x, y, mode_str(), line_h, line_v, corner, mark_st, mark_end, "");
+	if (!modified)
+		printf(" [%s]", fname );
+	else
+		printf(" *%s*", fname );
+#ifdef DEBUG
+	printf("  '%d'  ", screen[y].s[x]);
+#endif
+	printf("\033[0m");
+	fflush(stdout);
+}
+
+char get_key(FILE *fc, char *msg){
+
+	if (silent)
+		return 0;
+	printf("\033[%d;1f\033[7m", HEIGHT+1);
+	printf("%*s", WIDTH, "");
+	printf("\033[%d;1f\033[7m", HEIGHT+1);
+	printf("%s", msg);
+	fflush(stdout);
+	printf("\033[0m");
+	fflush(stdout);
+	return fgetc(fc);
+}
+
+void get_string(FILE *fc, char *msg, char *s, int sz){
+
+	if (!silent){
+		printf("\033[%d;1f\033[7m", HEIGHT+1);
+		printf("%*s", WIDTH, "");
+		printf("\033[%d;1f\033[7m", HEIGHT+1);
+	
+		/* We must activate echo now */
+		t3 = t2;
+		t3.c_lflag |= (ECHO | ICANON);
+		tcsetattr(0, TCSANOW, &t3);
+		printf("%s", msg);
+		printf("\033[0m");
+	}
+	fgets(s, sz, fc);
+	s[strlen(s)-1] = '\0';
+	tcsetattr(0, TCSANOW, &t2);
+	if (!silent)
+		fflush(stdout);
+}
+
+int is_yes(char c){
+	return c=='y' ? 1 : c == 'Y'? 1 : 0;
+}
+
+/*** Screen management ***/
+
+void show_cursor(){
+	if (silent)
+		return;
+	printf("\033[%d;%df", y+1, x+1);
+	fflush(stdout);
+}
+
+
+void set_xy(int _x, int _y, char c){
+	line_t *tmp;
+	if (_y >= num_lines){
+		tmp = realloc(screen, (_y + LONG_STEP)* sizeof(line_t));
+		if (tmp == NULL){
+			fprintf(stderr, "Unable to allocate memory for more lines");
+			exit(1);
+		}
+		else while ( num_lines < _y + LONG_STEP){
+			screen[num_lines].sz = WIDTH+1;
+			screen[num_lines].s = malloc((screen[num_lines].sz) * sizeof(char));
+			if (screen[num_lines].s == NULL){
+				perror("allocating screen[num_lines].s");
+				exit(1);
+			}
+			memset(screen[num_lines].s, BG, screen[num_lines].sz);
+			screen[num_lines].lst = 0;
+			screen[num_lines].s[screen[num_lines].lst+1]='\0';
+			num_lines ++;
+		}
+	}
+	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].lst ++;
+		screen[_y].s[screen[_y].lst] = BG;
+	}
+	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){
+	/* FIXME: check if x and y are valid!!!! */
+	if (silent)
+		return;
+	printf("\033[%d;%df",y+1,x+1);
+	putchar(c);
+	fflush(stdout);
+}
+
+void update_current(){
+	if (silent)
+		return;
+	printf("\033[%d'%df",y+1,x+1);
+	putchar(screen[y].s[x]);
+	fflush(stdout);
+}
+
+void erase_line(char *s){
+	while(*s){
+		*s = BG;
+		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++)
+		erase_line(screen[i].s);
+}
+
+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 reset_styles(){
+
+	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];
+}
+
+void redraw(){
+	int i;
+
+	if (silent)
+		return;
+	printf("\033[2J\033[1;1H");
+	for (i=0;i<HEIGHT;i++){
+		fprintf(stdout,"%s\n",screen[i].s);
+	}
+	status_bar();
+	show_cursor();
+}
+
+void go_to(int where){
+	switch(where){
+		case HOME:
+			x = y = 0;
+			break;
+		case END:
+			x = WIDTH-1;
+			y = HEIGHT-1;
+			break;
+		case MIDDLE:
+			x = WIDTH/2;
+			y = HEIGHT/2;
+			break;
+	}
+	check_bound();
+	show_cursor();
+}
+
+void handle_goto(){
+	char c;	
+	c=getchar();
+	switch(c){
+		case 'h':
+			dir = DIR_L;
+			x = 0;
+			break;
+		case 'l':
+			dir = DIR_R;
+			x = WIDTH - 1;
+			break;
+		case 'j':
+			dir = DIR_D;
+			y = HEIGHT - 1;
+			break;
+		case 'k':
+			dir = DIR_U;
+			y = 0;
+			break;
+		case 'g':
+			dir = DIR_N;
+			go_to(HOME);
+			break;
+		case 'G':
+			dir = DIR_N;
+			go_to(END);
+			break;
+		case 'm':
+			dir = DIR_N;
+			go_to(MIDDLE);
+			break;
+	}
+	check_bound();
+	show_cursor();
+}
+
+
+int get_escape(FILE *fc){
+	char c[4];
+	
+	c[0] = fgetc(fc);
+	if (c[0] == '['){
+		c[1] = fgetc(fc);
+		switch(c[1]){
+			case 'D':
+				dir = DIR_L;
+				x -= step;
+				break;
+			case 'B':
+				dir = DIR_D;
+				y += step;
+				break;
+			case 'A':
+				dir = DIR_U;
+				y -= step;
+				break;
+			case 'C':
+				dir = DIR_R;
+				x += step;
+				break;
+		}
+		return 1;
+	}
+	else{
+		ungetc(c[0], fc);
+		return 0;
+	}
+
+}
+
+
+int move_around(char c, FILE *fc){
+
+	if (isdigit(c)){
+		if (mult)
+			mult *=10;
+		mult += c - '0';
+		return 0;
+	}
+	switch(c){
+		case 27: /* control sequence? */
+			c = get_escape(fc);
+			break;
+		case 'H': step = LONG_STEP;/** FALLTHROUGH **/
+		case 'h':
+			dir = DIR_L;
+			if (mult) 
+				step *= mult;
+			x -= step;
+			break;
+		case 'J': step = LONG_STEP;/** FALLTHROUGH **/
+		case 'j':
+			if (mult) 
+				step *= mult;
+			dir = DIR_D;
+			y += step;
+			break;
+		case 'K': step = LONG_STEP;/** FALLTHROUGH **/
+		case 'k':
+			if (mult) 
+				step *= mult;
+			dir = DIR_U;
+			y -= step;
+			break;
+		case 'L': step = LONG_STEP;/** FALLTHROUGH **/
+		case 'l':
+			if (mult) 
+				step *= mult;
+			dir = DIR_R;
+			x += step;
+			break;
+		case 'g':
+			handle_goto();
+			break;
+		default:
+			return 0;
+	}
+	mult = 0;
+	return c;
+}
+
+
+void set_video(int v){
+	if (silent)
+		return;
+	printf("\033[%dm", v);
+	fflush(stdout);
+}
+
+
+void init_screen(){
+	int i;
+	struct winsize wsz;
+	
+	if (!ioctl(STDIN_FILENO, TIOCGWINSZ, &wsz)){
+		WIDTH=wsz.ws_col - 2;
+		HEIGHT=wsz.ws_row - 1;
+	}
+	else {
+		WIDTH=80;
+		HEIGHT=24;
+	}
+	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].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].s, BG, screen[i].sz);
+		screen[i].lst = 0;
+		screen[i].s[screen[i].lst+1]='\0';
+	}
+	hlines_sz= sizeof(hlines) -1;
+	vlines_sz= sizeof(vlines) -1;
+	corners_sz = sizeof(corners) -1;
+	stmarks_sz = sizeof(st_marks) - 1;
+	endmarks_sz = sizeof(st_marks) - 1;
+	reset_styles();
+}
+
-- 
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