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-rw-r--r--main.c175
1 files changed, 175 insertions, 0 deletions
diff --git a/main.c b/main.c
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+++ b/main.c
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+/*
+*
+* gramscii: a simple editor for ASCII box-and-arrow charts
+*
+* Copyright (c) 2019 Vincenzo "KatolaZ" Nicosia <katolaz@freaknet.org>
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program. Please see the attached file COPYING.
+* Otherwise, please visit <https://www.gnu.org/licenses/>.
+*
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+
+#include "arg.h"
+#include "gramscii.h"
+
+
+char *argv0;
+
+void dump_lines(){
+ int i;
+ for (i=0; i<HEIGHT; i++){
+ printf("%s\n", screen[i].s);
+ }
+}
+
+void cleanup(int s){
+
+ if (!silent)
+ printf("\033[;H\033[2J");
+ else
+ dump_lines();
+ tcsetattr(0, TCSANOW, &t1);
+ fflush(stdout);
+ exit(0);
+}
+
+void exit_cleanup(void){
+ cleanup(0);
+}
+
+/*** Initialisation ***/
+
+void init(){
+
+ signal(SIGHUP, cleanup);
+ signal(SIGINT, cleanup);
+ signal(SIGTERM, cleanup);
+ signal(SIGQUIT, cleanup);
+ atexit(exit_cleanup);
+
+ tcgetattr(0, &t1);
+ t2 = t1;
+ t2.c_lflag &= ~(ICANON | ECHO);
+ tcsetattr(0, TCSANOW, &t2);
+
+ init_screen();
+ x = 0;
+ y = 0;
+ modified = 0;
+ fname[0] = '\0';
+ redraw();
+}
+
+
+/*** Commands ***/
+
+void commands(FILE *fc){
+
+ char c;
+ while((c=fgetc(fc))!=EOF){
+ if (!change_style(c) && !move_around(c, fc)){
+ switch(c){
+ case 'i':
+ mode = TEXT;
+ get_text(fc);
+ break;
+ case 'R':
+ redraw();
+ break;
+ case 'b':
+ mode = BOX;
+ get_box(fc);
+ break;
+ case 'A': autoend=1;
+ case 'a':
+ mode = ARROW;
+ get_arrow(fc);
+ autoend = 0;
+ break;
+ case 'W':
+ force_new = 1;/** FALLTHROUGH **/
+ case 'w':
+ write_file(fc);
+ break;
+ case 'e':
+ check_modified(fc);/** FALLTHROUGH **/
+ case 'E':
+ load_file(fc);
+ break;
+ case 'N':
+ new_file(fc);
+ break;
+ case 'x':
+ mode = DEL;
+ erase(fc);
+ break;
+ case 'v':
+ mode = VIS;
+ visual_box(fc);
+ break;
+ case 'q':
+ check_modified(fc);/** FALLTHROUGH **/
+ case 'Q':
+ exit(0);
+ break;
+ }
+ }
+ check_bound();
+ status_bar();
+ show_cursor();
+ step = 1;
+ force_new = 0;
+ }
+
+}
+
+void usage(){
+ fprintf(stderr, "Usage: %s [-s] [-h] [file ...]\n", argv0);
+ exit(1);
+}
+
+
+int main(int argc, char *argv[]){
+ FILE *fc;
+
+ ARGBEGIN {
+ case 's':
+ silent = 1;
+ break;
+ case 'h': /* FALLTHROUGH */
+ default:
+ usage();
+ } ARGEND;
+
+ init();
+ while (argc){
+ fc = fopen(argv[0], "r");
+ if (fc == NULL){
+ fprintf(stderr, "Error opening file %s\n", argv[0]);
+ }
+ else {
+ commands(fc);
+ fclose(fc);
+ redraw();
+ }
+ argv++;
+ argc--;
+ }
+ commands(stdin);
+ return 0;
+}