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