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	files.c - gramscii - A simple editor for ASCII box-and-arrow charts
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	files.c (2694B)
	---
	1 #define _POSIX_C_SOURCE 200112L
	2
	3 #include <stdio.h>
	4 #include <string.h>
	5 #include "gramscii.h"
	6
	7
	8 / extern declarations /
	9
	10 extern lineset_t screen; /* what is visualised */
	11
	12 extern int WIDTH, HEIGHT;
	13
	14 extern int force_new;
	15 extern char modified; /* set to 1 if screen modified since last save */
	16 extern char fname[256];
	17
	18 /* File management */
	19
	20 void write_file(FILE *fc){
	21 FILE *fout;
	22 int i, ne;
	23
	24 if (!fname[0] \|\| force_new){
	25 get_string(fc, "Write to: ", fname, 255);
	26 if ((fout=fopen(fname, "r"))!=NULL){
	27 if (!is_yes(get_key(fc,"File exists. Overwrite […
	28 fclose(fout);
	29 return;
	30 }
	31 fclose(fout);
	32 }
	33 }
	34 if((fout=fopen(fname, "w"))==NULL){
	35 get_key(fc, "Error opening file.");
	36 return;
	37 }
	38 ne = 0;
	39 for (i=0; i<HEIGHT; i++){
	40 if (strlen(screen.l[i].s)){/* remove trailing blank line…
	41 /* put the empty lines preceeding the current no…
	42 while (ne--)
	43 fprintf(fout, "\n");
	44 fprintf(fout, "%s\n", screen.l[i].s);
	45 ne = 0;
	46 }
	47 else ne++;
	48 }
	49 fclose(fout);
	50 modified = 0;
	51 get_key(fc, "File saved.");
	52 redraw();
	53 }
	54
	55 void check_modified(FILE *fc){
	56
	57 if (modified){
	58 if (!is_yes(get_key(fc, "Unsaved changes. Write to file …
	59 return;
	60 }
	61 write_file(fc);
	62 }
	63 }
	64
	65 void load_file(FILE *fc){
	66
	67 char newfname[256];
	68 FILE *fin;
	69 int i;
	70
	71 get_string(fc, "Load file: ", newfname, 255);
	72 if ((fin=fopen(newfname, "r")) != NULL){
	73 i = 0;
	74 while((fgets(screen.l[i].s, WIDTH+1, fin)) != NULL && i<…
	75 screen.l[i].lst = strlen(screen.l[i].s) - 2;
	76 screen.l[i].n = i;
	77 screen.l[i].s[strlen(screen.l[i].s)-1]='\0';
	78 i++;
	79 }
	80 for(;i<HEIGHT; i++){
	81 erase_line(i);
	82 }
	83 fclose(fin);
	84 }
	85 strcpy(fname, newfname);
	86 modified=0;
	87 redraw();
	88 }
	89
	90 void new_file(FILE *fc){
	91 check_modified(fc);
	92 erase_screen();
	93 go_to(HOME);
	94 redraw();
	95 fname[0] = '\0';
	96 modified=0;
	97 }
	98
	99 void read_file_at(FILE *fc, int xl, int yl){
	100
	101 char nfname[512], tmp[512], fptr, tptr;
	102 FILE *fin;
	103 int i, j;
	104 char ftype;
	105
	106 get_string(fc, "Read file: ", nfname, 511);
	107 fptr = nfname;
	108 while(fptr && _isblank(fptr))
	109 fptr ++;
	110 if (*fptr == '!'){
	111 fin = popen(++fptr, "r");
	112 ftype = FPIPE;
	113 }
	114 else {
	115 fin = fopen(fptr, "r");
	116 ftype = FFILE;
	117 }
	118 if (fin != NULL){
	119 copy_lines_to_ring(0, HEIGHT-1, PRV_STATE);
	120 i = yl;
	121 while((fgets(tmp, WIDTH+1, fin)) != NULL && i<HEIGHT){
	122 j = xl;
	123 tptr = tmp;
	124 if (strlen(tmp))
	125 tmp[strlen(tmp) - 1] = '\0';
	126 ensure_line_length(& (screen.l[i]), xl + strlen(…
	127 while (*tptr && j < WIDTH){
	128 set_xy(j, i, *tptr);
	129 j++;
	130 tptr ++;
	131 }
	132 i++;
	133 }
	134 if (ftype == FFILE)
	135 fclose(fin);
	136 else
	137 pclose(fin);
	138 modified = 1;
	139 redraw();
	140 copy_lines_to_ring(yl, i-1, NEW_STATE);
	141 }
	142 }