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screen.c - gramscii - A simple editor for ASCII box-and-arrow charts |
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README |
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LICENSE |
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--- |
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screen.c (10512B) |
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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 <stdlib.h> |
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5 #include <string.h> |
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6 #include <termios.h> |
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7 #include <sys/ioctl.h> |
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8 #include <ctype.h> |
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9 |
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10 #include "gramscii.h" |
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11 #include "config.h" |
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12 |
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13 /** extern declarations **/ |
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14 |
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15 extern lineset_t screen; /* what is visualised */ |
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16 extern lineset_t cutbuf; /* cut/paste buffer */ |
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17 extern lineset_t *undo; /* undo list */ |
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18 |
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19 extern pos_t marks[26]; /* position marks */ |
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20 extern char mark_map[26]; /* marks map */ |
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21 |
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22 extern int undo_sz;/* allocated size of undo list*/ |
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23 extern int undo_cur;/* undo position */ |
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24 extern int undo_lst;/* last valid undo position */ |
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25 |
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26 extern int WIDTH, HEIGHT; |
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27 |
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28 extern int mode;/* mode */ |
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29 extern int dir;/* line direction */ |
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30 extern int x; |
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31 extern int y; |
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32 extern int step;/* current step */ |
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33 extern int mult;/* current multiplier */ |
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34 |
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35 extern char corner; |
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36 |
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37 /* number of available markers for each type */ |
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38 extern int hlines_sz; |
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39 extern int vlines_sz; |
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40 extern int corners_sz; |
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41 extern int stmarks_sz; |
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42 extern int endmarks_sz; |
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43 /**/ |
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44 |
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45 /* line and arrow markers */ |
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46 extern int cur_hl, cur_vl, cur_corn, cur_start, cur_end; |
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47 extern char line_h; |
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48 extern char line_v; |
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49 extern char mark_st; |
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50 extern char mark_end; |
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51 /**/ |
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52 |
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53 extern char modified; /* set to 1 if screen modified since last save */ |
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54 extern char fname[256]; |
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55 |
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56 |
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57 extern char script; /* set to 1 in script-mode */ |
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58 |
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59 extern struct termios t2, t3; |
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60 |
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61 |
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62 /*** screen management functions ***/ |
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63 |
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64 /*** _isblank ***/ |
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65 |
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66 int _isblank(int c){ |
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67 return c==32 || c==9 ? 1 : 0; |
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68 } |
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69 |
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70 |
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71 /*** Status bar ***/ |
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72 |
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73 char* mode_str(){ |
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74 switch(mode){ |
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75 case MOVE: |
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76 return "mov"; |
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77 case TEXT: |
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78 return "txt"; |
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79 case BOX: |
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80 return "box"; |
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81 case ARROW: |
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82 return "arr"; |
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83 case DEL: |
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84 return "del"; |
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85 case VIS: |
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86 return "vis"; |
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87 case PAR: |
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88 return "par"; |
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89 case REM: |
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90 return "rem"; |
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91 case TRP: |
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92 return "trp"; |
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93 default: |
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94 return "ERR"; |
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95 } |
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96 return "ERR"; |
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97 } |
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98 |
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99 char get_mark(char dir){ |
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100 switch(dir){ |
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101 case DIR_U: |
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102 return '^'; |
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103 case DIR_D: |
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104 return 'v'; |
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105 case DIR_L: |
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106 return '<'; |
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107 case DIR_R: |
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108 return '>'; |
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109 } |
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110 return '>'; |
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111 } |
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112 |
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113 |
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114 void status_bar(){ |
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115 |
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116 if (script) |
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117 return; |
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118 printf("\033[%d;1f\033[7m", HEIGHT+1); |
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119 printf("%*s", WIDTH-1, ""); |
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120 printf("\033[%d;1f\033[7m", HEIGHT+1); |
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121 printf(" x:%3d y:%3d -- MODE:%4s HL:%c VL:%c CN:%c SP:%c EP:%c %10s", |
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122 x, y, mode_str(), line_h, line_v, corner, mark_st, mark_end, ""); |
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123 if (!modified) |
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124 printf(" [%s]", fname ); |
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125 else |
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126 printf(" *%s*", fname ); |
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127 #ifdef DEBUG |
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128 printf(" '%d' ", screen.l[y].s[x]); |
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129 #endif |
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130 printf("\033[0m"); |
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131 fflush(stdout); |
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132 } |
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133 |
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134 char get_key(FILE *fc, char *msg){ |
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135 |
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136 if (script) |
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137 return 0; |
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138 printf("\033[%d;1f\033[7m", HEIGHT+1); |
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139 printf("%*s", WIDTH, ""); |
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140 printf("\033[%d;1f\033[7m", HEIGHT+1); |
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141 printf("%s", msg); |
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142 fflush(stdout); |
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143 printf("\033[0m"); |
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144 fflush(stdout); |
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145 return fgetc(fc); |
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146 } |
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147 |
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148 void get_string(FILE *fc, char *msg, char *s, int sz){ |
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149 |
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150 if (!script){ |
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151 printf("\033[%d;1f\033[7m", HEIGHT+1); |
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152 printf("%*s", WIDTH, ""); |
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153 printf("\033[%d;1f\033[7m", HEIGHT+1); |
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154 |
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155 /* We must activate echo now */ |
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156 t3 = t2; |
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157 t3.c_lflag |= (ECHO | ICANON); |
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158 tcsetattr(0, TCSANOW, &t3); |
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159 printf("%s", msg); |
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160 printf("\033[0m"); |
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161 } |
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162 fgets(s, sz, fc); |
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163 s[strlen(s)-1] = '\0'; |
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164 if (!script){ |
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165 tcsetattr(0, TCSANOW, &t2); |
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166 fflush(stdout); |
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167 } |
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168 } |
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169 |
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170 int is_yes(char c){ |
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171 return c=='y' ? 1 : c == 'Y'? 1 : 0; |
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172 } |
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173 |
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174 /*** Screen management ***/ |
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175 |
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176 |
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177 void show_cursor(){ |
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178 if (script) |
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179 return; |
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180 printf("\033[%d;%df", y+1, x+1); |
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181 fflush(stdout); |
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182 } |
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183 |
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184 |
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185 void set_xy(int _x, int _y, char c){ |
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186 ensure_num_lines(&screen, _y + 1); |
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187 ensure_line_length(&(screen.l[_y]), _x + 1); |
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188 while (screen.l[_y].lst<_x){ |
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189 screen.l[_y].lst ++; |
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190 screen.l[_y].s[screen.l[_y].lst] = BG; |
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191 } |
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192 screen.l[_y].s[_x] = c; |
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193 if (_x == screen.l[_y].lst) |
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194 screen.l[_y].s[_x+1] = '\0'; |
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195 } |
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196 |
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197 void set_cur(char c){ |
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198 set_xy(x, y, c); |
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199 } |
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200 |
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201 void draw_xy(int x, int y, char c){ |
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202 /* FIXME: check if x and y are valid!!!! */ |
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203 if (script) |
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204 return; |
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205 printf("\033[%d;%df",y+1,x+1); |
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206 putchar(c); |
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207 fflush(stdout); |
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208 } |
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209 |
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210 void update_current(){ |
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211 if (script) |
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212 return; |
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213 printf("\033[%d;%df",y+1,x+1); |
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214 putchar(screen.l[y].s[x]); |
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215 fflush(stdout); |
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216 } |
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217 |
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218 void erase_blank_lines(int y1, int y2){ |
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219 int j; |
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220 if (y1 > y2){ |
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221 y1 ^= y2; |
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222 y2 ^= y1; |
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223 y1 ^= y2; |
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224 } |
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225 |
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226 for (; y1 <= y2; y1++){ |
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227 j = screen.l[y1].lst; |
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228 while (j>=0 && _isblank(screen.l[y1].s[j])) |
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229 j--; |
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230 if (j<0){ |
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231 screen.l[y1].lst = -1; |
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232 screen.l[y1].s[0] = '\0'; |
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233 } |
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234 } |
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235 } |
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236 |
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237 |
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238 void erase_line(int i){ |
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239 screen.l[i].lst = -1; |
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240 screen.l[i].s[0] = '\0'; |
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241 } |
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242 |
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243 void erase_box(int x1, int y1, char c){ |
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244 int x_incr, y_incr, i; |
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245 |
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246 x_incr = x1 < x? +1: -1; |
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247 y_incr = y1 < y? +1: -1; |
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248 do{ |
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249 i = y1; |
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250 do{ |
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251 set_xy(x1, i, c); |
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252 } while(i != y && (1 | (i += y_incr))); |
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253 } while(x1 != x && (1 | (x1 += x_incr))); |
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254 |
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255 } |
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256 |
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257 void erase_screen(){ |
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258 int i; |
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259 for(i=0;i<HEIGHT; i++) |
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260 erase_line(i); |
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261 } |
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262 |
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263 void check_bound(int *x, int *y){ |
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264 if (*x<0) *x=0; |
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265 else if (*x>=WIDTH) *x = WIDTH-1; |
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266 if (*y<0) *y=0; |
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267 else if (*y>=HEIGHT) *y = HEIGHT -1; |
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268 } |
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269 |
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270 void reset_styles(){ |
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271 |
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272 cur_corn = 0; |
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273 corner = corners[0]; |
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274 cur_hl = cur_vl = 0; |
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275 cur_start = cur_end = 0; |
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276 line_h = hlines[cur_hl]; |
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277 line_v = vlines[cur_vl]; |
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278 mark_st = st_marks[cur_start]; |
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279 mark_end = end_marks[cur_end]; |
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280 } |
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281 |
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282 void redraw(){ |
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283 int i; |
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284 |
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285 if (script) |
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286 return; |
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287 printf("\033[2J\033[1;1H"); |
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288 for (i=0;i<HEIGHT;i++){ |
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289 fprintf(stdout,"%s\n",screen.l[i].s); |
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290 } |
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291 status_bar(); |
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292 show_cursor(); |
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293 } |
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294 |
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295 void go_to(int where){ |
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296 switch(where){ |
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297 case HOME: |
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298 x = y = 0; |
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299 break; |
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300 case END: |
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301 x = WIDTH-1; |
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302 y = HEIGHT-1; |
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303 break; |
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304 case MIDDLE: |
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305 x = WIDTH/2; |
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306 y = HEIGHT/2; |
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307 break; |
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308 } |
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309 check_bound(&x, &y); |
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310 show_cursor(); |
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311 } |
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312 |
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313 void handle_goto(FILE *fc, char global){ |
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314 char c; |
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315 c=fgetc(fc); |
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316 switch(c){ |
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317 case 'h': |
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318 dir = DIR_L; |
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319 step = x; |
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320 x = 0; |
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321 break; |
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322 case 'l': |
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323 dir = DIR_R; |
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324 step = WIDTH - x -1; |
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325 x = WIDTH - 1; |
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326 break; |
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327 case 'j': |
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328 dir = DIR_D; |
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329 step = HEIGHT - y-1; |
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330 y = HEIGHT - 1; |
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331 break; |
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332 case 'k': |
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333 dir = DIR_U; |
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334 step = y; |
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335 y = 0; |
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336 break; |
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337 case 'g': |
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338 if (global){ |
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339 dir = DIR_N; |
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340 go_to(HOME); |
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341 } else step = 0; |
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342 break; |
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343 case 'G': |
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344 if (global){ |
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345 dir = DIR_N; |
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346 go_to(END); |
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347 } else step = 0; |
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348 break; |
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349 case 'm': |
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350 if (global){ |
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351 dir = DIR_N; |
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352 go_to(MIDDLE); |
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353 } else step = 0; |
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354 break; |
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355 case '\'': |
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356 c = tolower(fgetc(fc)); |
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357 if (global) { |
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358 dir = DIR_N; |
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359 if (isalpha(c) && mark_map[c - 'a']){ |
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360 x = marks[c - 'a'].x; |
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361 y = marks[c - 'a'].y; |
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362 #ifdef DEBUG |
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363 fprintf(stderr, "going to valid mark '%c' (%d, %d)\n", c, x, y); |
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364 #endif |
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365 } |
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366 #ifdef DEBUG |
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367 else |
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368 fprintf(stderr, "invalid mark '%c'\n", c); |
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369 #endif |
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370 } else step = 0; |
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371 break; |
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372 |
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373 } |
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374 |
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375 #ifdef DEBUG |
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376 fprintf(stderr, "global move: dir: %d x: %d y: %d\n", dir, x, y); |
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377 #endif |
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378 check_bound(&x, &y); |
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379 show_cursor(); |
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380 } |
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381 |
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382 |
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383 int get_escape(FILE *fc){ |
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384 char c[4]; |
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385 |
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386 c[0] = fgetc(fc); |
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387 if (c[0] == '['){ |
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388 c[1] = fgetc(fc); |
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389 switch(c[1]){ |
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390 case 'D': |
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391 dir = DIR_L; |
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392 x -= step; |
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393 break; |
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394 case 'B': |
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395 dir = DIR_D; |
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396 y += step; |
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397 break; |
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398 case 'A': |
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399 dir = DIR_U; |
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400 y -= step; |
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401 break; |
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402 case 'C': |
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403 dir = DIR_R; |
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404 x += step; |
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405 break; |
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406 } |
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407 return 1; |
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408 } |
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409 else{ |
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410 ungetc(c[0], fc); |
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411 return 0; |
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412 } |
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413 |
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414 } |
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415 |
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416 |
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417 int move_around(char c, FILE *fc, char global){ |
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418 |
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419 if (isdigit(c)){ |
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420 if (mult) |
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421 mult *=10; |
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422 mult += c - '0'; |
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423 return 0; |
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424 } |
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425 #ifdef DEBUG |
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426 fprintf(stderr, "got char: %c\n", c); |
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427 #endif |
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428 switch(c){ |
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429 case 27: /* control sequence? */ |
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430 c = get_escape(fc); |
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431 break; |
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432 case 'H': step = LONG_STEP;/** FALLTHROUGH **/ |
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433 case 'h': |
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434 dir = DIR_L; |
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435 if (mult) |
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436 step *= mult; |
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437 x -= step; |
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438 break; |
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439 case 'J': step = LONG_STEP;/** FALLTHROUGH **/ |
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440 case 'j': |
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441 if (mult) |
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442 step *= mult; |
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443 dir = DIR_D; |
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444 y += step; |
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445 break; |
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446 case 'K': step = LONG_STEP;/** FALLTHROUGH **/ |
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447 case 'k': |
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448 if (mult) |
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449 step *= mult; |
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450 dir = DIR_U; |
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451 y -= step; |
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452 break; |
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453 case 'L': step = LONG_STEP;/** FALLTHROUGH **/ |
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454 case 'l': |
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455 if (mult) |
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456 step *= mult; |
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457 dir = DIR_R; |
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458 x += step; |
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459 break; |
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460 case 'g': |
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461 #ifdef DEBUG |
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462 fprintf(stderr, "before handle_goto: step: %d x: %d y: %d global: %d\n", step, x, y, global); |
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463 #endif |
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464 handle_goto(fc, global); |
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465 #ifdef DEBUG |
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466 fprintf(stderr, "after handle_goto: step: %d x: %d y: %d global: %d\n", step, x, y, global); |
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467 #endif |
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468 break; |
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469 default: |
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470 return 0; |
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|
471 } |
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472 mult = 0; |
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|
473 return c; |
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|
474 } |
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|
475 |
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|
476 |
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|
477 void set_video(int v){ |
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|
|
478 if (script) |
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|
|
479 return; |
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|
|
480 printf("\033[%dm", v); |
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|
|
481 fflush(stdout); |
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|
|
482 } |
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|
|
483 |
|
|
|
484 |
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|
|
485 void init_screen(){ |
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|
|
486 int i; |
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|
|
487 struct winsize wsz; |
|
|
|
488 |
|
|
|
489 if (!ioctl(STDIN_FILENO, TIOCGWINSZ, &wsz)){ |
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|
|
490 WIDTH=wsz.ws_col - 2; |
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|
|
491 HEIGHT=wsz.ws_row - 1; |
|
|
|
492 } |
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|
|
493 else { |
|
|
|
494 WIDTH=80; |
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|
|
495 HEIGHT=24; |
|
|
|
496 } |
|
|
|
497 screen.l = malloc(HEIGHT * sizeof(line_t)); |
|
|
|
498 screen.sz = HEIGHT; |
|
|
|
499 screen.num = HEIGHT; |
|
|
|
500 if (screen.l == NULL){ |
|
|
|
501 fprintf(stderr, "Error allocating screen"); |
|
|
|
502 cleanup(1); |
|
|
|
503 } |
|
|
|
504 for (i=0; i<HEIGHT; i++){ |
|
|
|
505 alloc_line(&(screen.l[i])); |
|
|
|
506 } |
|
|
|
507 /* init markers */ |
|
|
|
508 hlines_sz= sizeof(hlines) -1; |
|
|
|
509 vlines_sz= sizeof(vlines) -1; |
|
|
|
510 corners_sz = sizeof(corners) -1; |
|
|
|
511 stmarks_sz = sizeof(st_marks) - 1; |
|
|
|
512 endmarks_sz = sizeof(st_marks) - 1; |
|
|
|
513 reset_styles(); |
|
|
|
514 /* init undo ring */ |
|
|
|
515 cutbuf.sz = 0; |
|
|
|
516 cutbuf.l = NULL; |
|
|
|
517 cutbuf.num = 0; |
|
|
|
518 undo = NULL; |
|
|
|
519 undo_sz = 0; |
|
|
|
520 undo_cur = -2; |
|
|
|
521 undo_lst = -2; |
|
|
|
522 /* init pos marks */ |
|
|
|
523 memset(mark_map, 0, 26 * sizeof(char)); |
|
|
|
524 } |
|
|
|
525 |
|
|
|
526 void find_nonblank_rect(int *x1, int *y1, int *x2, int *y2){ |
|
|
|
527 |
|
|
|
528 int i, j; |
|
|
|
529 int first; |
|
|
|
530 *x1= WIDTH; /** FIXME: replace with num_cols **/ |
|
|
|
531 *y1 = screen.num; |
|
|
|
532 *x2 = *y2 = 0; |
|
|
|
533 |
|
|
|
534 for (i=0; i<screen.num; i++){ |
|
|
|
535 if (screen.l[i].lst < 0) |
|
|
|
536 continue; |
|
|
|
537 *y2 = i; |
|
|
|
538 if (i < *y1) |
|
|
|
539 *y1 = i; |
|
|
|
540 j = 0; |
|
|
|
541 while((j <= screen.l[i].lst) && _isblank(first=screen.l[i].s[j])) |
|
|
|
542 j++; |
|
|
|
543 if (j < *x1) |
|
|
|
544 *x1 = j; |
|
|
|
545 j = screen.l[i].lst; |
|
|
|
546 while(_isblank(screen.l[i].s[j])) |
|
|
|
547 j--; |
|
|
|
548 if (j > *x2) |
|
|
|
549 *x2 = j; |
|
|
|
550 } |
|
|
|
551 } |
|
|
|
552 |
|
|
|
553 void crop_to_rect(int x1, int y1, int x2, int y2){ |
|
|
|
554 int i; |
|
|
|
555 |
|
|
|
556 for (i=0; i<= y2-y1; i ++){ |
|
|
|
557 ensure_line_length(&(screen.l[i]), screen.l[i+y1].lst+1); |
|
|
|
558 sprintf(screen.l[i].s, "%s", screen.l[i+y1].s + x1); |
|
|
|
559 screen.l[i].lst = x2 - x1; |
|
|
|
560 screen.l[i].s[screen.l[i].lst + 1] = '\0'; |
|
|
|
561 } |
|
|
|
562 while (i< HEIGHT){ |
|
|
|
563 screen.l[i].lst = -1; |
|
|
|
564 screen.l[i].s[0]= '\0'; |
|
|
|
565 i ++; |
|
|
|
566 } |
|
|
|
567 } |
|
|
|
568 |
|
|
|
569 void crop_to_nonblank(){ |
|
|
|
570 int x1, x2, y1, y2; |
|
|
|
571 find_nonblank_rect(&x1, &y1, &x2, &y2); |
|
|
|
572 #ifdef DEBUG |
|
|
|
573 fprintf(stderr, "crop rectangle: (%d, %d)-(%d, %d)\n", x1, y1, x2, y2); |
|
|
|
574 #endif |
|
|
|
575 copy_lines_to_ring(0, y2, PRV_STATE); |
|
|
|
576 crop_to_rect(x1, y1, x2, y2); |
|
|
|
577 copy_lines_to_ring(0, y2, NEW_STATE); |
|
|
|
578 modified=1; |
|
|
|
579 redraw(); |
|
|
|
580 } |
|
|
|
581 |
|
|
|
582 /** position marks **/ |
|
|
|
583 |
|
|
|
584 void mark_pos(FILE *fc){ |
|
|
|
585 |
|
|
|
586 char c; |
|
|
|
587 c = tolower(fgetc(fc)); |
|
|
|
588 if (isalpha(c)){ |
|
|
|
589 marks[c - 'a'].x = x; |
|
|
|
590 marks[c - 'a'].y = y; |
|
|
|
591 mark_map[c - 'a'] = 1; |
|
|
|
592 #ifdef DEBUG |
|
|
|
593 fprintf(stderr, "marking pos (%d, %d) as '%c'\n", x, y, c); |
|
|
|
594 #endif |
|
|
|
595 } |
|
|
|
596 } |
|