Pileus Git - lackey/blob - src/form.c

   1 /*
   2  * Copyright (C) 2015 Andy Spencer <andy753421@gmail.com>
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #define _XOPEN_SOURCE
  19 #define _XOPEN_SOURCE_EXTENDED
  20
  21 #include <string.h>
  22 #include <ncurses.h>
  23
  24 #include "date.h"
  25 #include "form.h"
  26
  27 /* Constants */
  28 #define TEXT_WIDTH   (20)
  29 #define NUMBER_WIDTH (10)
  30 #define DATE_WIDTH   (4+1+2+1+2 +1+ 2+1+2)
  31
  32 /* Widget accessors */
  33 #define FF_TEXT(f)   (((form_text_t  *)f)->text)
  34 #define FF_DATE(f)   (((form_date_t  *)f)->date)
  35 #define FF_NUMBER(f) (((form_number_t*)f)->number)
  36 #define FF_BUTTON(f) (((form_button_t*)f)->button)
  37 #define FF_LIST(f)   (((form_list_t  *)f))
  38
  39 /* Local variables */
  40 static form_t *form;    // current form
  41 static WINDOW *win;     // current window
  42 static int     arow;    // active row
  43 static int     acol;    // active row
  44
  45 /* Helper functions */
  46 static int label_width(const char *label)
  47 {
  48         int len = 0;
  49         for (int i = 0; label[i]; i++)
  50                 if (label[i] != '_')
  51                         len++;
  52         return len;
  53 }
  54
  55 static void label_print(const char *label)
  56 {
  57         for (int i = 0; label[i]; i++) {
  58                 if (label[i] == '_' && label[i+1])
  59                         waddch(win, label[++i]
  60                                 | A_UNDERLINE | A_BOLD);
  61                 else
  62                         waddch(win, label[i]);
  63         }
  64 }
  65
  66 static int field_width(form_field_t *field)
  67 {
  68         // Calculate list width
  69         int list_size = 0;
  70         if (field->type == FORM_LIST) {
  71                 for (int i = 0; i < FF_LIST(field)->num; i++) {
  72                         int width = strlen(FF_LIST(field)->map[i]);
  73                         if (width > list_size)
  74                                 list_size = width;
  75                 }
  76         }
  77
  78         // Calculate field size
  79         int width = 0;
  80         if (field->before)
  81                 width += strlen(field->before);
  82         switch (field->type) {
  83                 case FORM_LABEL:  width += label_width(field->label); break;
  84                 case FORM_TEXT:   width += TEXT_WIDTH;                break;
  85                 case FORM_DATE:   width += DATE_WIDTH;                break;
  86                 case FORM_NUMBER: width += NUMBER_WIDTH;              break;
  87                 case FORM_BUTTON: width += label_width(field->label); break;
  88                 case FORM_LIST:   width += list_size;                 break;
  89         }
  90         if (field->after)
  91                 width += strlen(field->after);
  92         return width;
  93 }
  94
  95 static void field_sizes(form_t *form, int *col_size)
  96 {
  97         // Do this by column, and right to left so that we can add
  98         // in the extra space available for blank spaces.
  99         for (int c = form->cols-1; c >= 0; c--) {
 100                 col_size[c] = 0;
 101                 for (int r = 0; r < form->rows; r++) {
 102                         form_field_t *field = form->fields[r][c];
 103                         if (form->fields[r][c]) {
 104                                 int width = field_width(field);
 105                                 for (int i = c+1; i < form->cols; i++) {
 106                                         if (form->fields[r][i])
 107                                                 break;
 108                                         width -= col_size[i];
 109                                 }
 110                                 if (width > col_size[c])
 111                                         col_size[c] = width;
 112                         }
 113                 }
 114         }
 115 }
 116
 117 static void field_draw(form_field_t *field, int width, int hover)
 118 {
 119         char **map   = FF_LIST(field)->map;
 120         int    idx   = FF_LIST(field)->idx;
 121
 122         char *before = field->before ?: "";
 123         char *after  = field->after  ?: "";
 124
 125         int boxed    = field->type == FORM_TEXT ||
 126                        field->type == FORM_NUMBER;
 127         int under    = 0;
 128
 129         int begin    = getcurx(win);
 130         int maxstr   = width - strlen(before) - strlen(after);
 131
 132         if (hover)  wattron(win, A_REVERSE);
 133         if (under)  wattron(win, A_UNDERLINE);
 134         if (boxed)  waddch(win, '[');
 135         if (boxed)  maxstr -= 2;
 136
 137         wprintw(win, "%s", before);
 138         switch (field->type) {
 139                 case FORM_LABEL:
 140                         label_print(field->label);
 141                         break;
 142                 case FORM_TEXT:
 143                         wprintw(win, "%-.*s",
 144                                 maxstr, FF_TEXT(field));
 145                         break;
 146                 case FORM_DATE:
 147                         if (no_date(&FF_DATE(field)))
 148                                 wprintw(win, "%s", "undefined");
 149                         else
 150                                 wprintw(win, "%04d-%02d-%02d %02d:%02d",
 151                                         FF_DATE(field).year,  FF_DATE(field).month+1,
 152                                         FF_DATE(field).day+1, FF_DATE(field).hour,
 153                                         FF_DATE(field).min);
 154                         break;
 155                 case FORM_NUMBER:
 156                         wprintw(win, "%d", FF_NUMBER(field));
 157                         break;
 158                 case FORM_BUTTON:
 159                         wprintw(win, "%s", field->label);
 160                         break;
 161                 case FORM_LIST:
 162                         if (map)
 163                                 wprintw(win, "%s", map[idx]);
 164                         else
 165                                 wprintw(win, "%s", "undefined");
 166                         break;
 167         }
 168         int pad = width-(getcurx(win)-begin)-boxed;
 169         wprintw(win, "%-*s", pad, after);
 170
 171         if (boxed)  waddch(win, ']');
 172         if (under)  wattroff(win, A_UNDERLINE);
 173         if (hover)  wattroff(win, A_REVERSE);
 174 }
 175
 176 static int is_active(form_t *form, int r, int c)
 177 {
 178         for (int i = c; i >= 0; i--) {
 179                 if (r == arow && i == acol)
 180                         return 1;
 181                 if (form->fields[r][i])
 182                         break;
 183         }
 184         for (int i = c+1; i < form->cols; i++) {
 185                 if (form->fields[r][i])
 186                         break;
 187                 if (r == arow && i == acol)
 188                         return 1;
 189         }
 190         return 0;
 191 }
 192
 193 static int can_active(form_t *form, int r, int c)
 194 {
 195         for (int i = c; i >= 0; i--) {
 196                 if (!form->fields[r][i])
 197                         continue;
 198                 if (form->fields[r][i]->type == FORM_LABEL)
 199                         return 0;
 200                 return 1;
 201         }
 202         return 0;
 203 }
 204
 205 static int set_active(form_t *form, int r, int c)
 206 {
 207         if (can_active(form, r, c)) {
 208                 arow = r;
 209                 acol = c;
 210                 return 1;
 211         }
 212         return 0;
 213 }
 214
 215 static void move_active(form_t *form, int ro, int co)
 216 {
 217         // Set first field
 218         if (ro==0 && co==0)
 219                 for (int r = 0; r < form->rows; r++)
 220                 for (int c = 0; c < form->cols; c++)
 221                         if (set_active(form, r, c))
 222                                 return;
 223
 224         // Move up/down
 225         if (ro) {
 226                 for (int ri = arow+ro; ri>=0 && ri<form->rows; ri+=ro) {
 227                         if (is_active(form, ri, acol))
 228                                 continue;
 229                         // Search for a row
 230                         for (int ci = acol; ci < form->cols; ci++)
 231                                 if (set_active(form, ri, ci))
 232                                         return;
 233                         for (int ci = acol; ci >= 0; ci--)
 234                                 if (set_active(form, ri, ci))
 235                                         return;
 236                 }
 237         }
 238
 239         // Move left/right
 240         if (co) {
 241                 for (int ci = acol+co; ci>=0 && ci<form->cols; ci+=co) {
 242                         if (is_active(form, arow, ci))
 243                                 continue;
 244                         // Simple move
 245                         if (set_active(form, arow, ci))
 246                                 return;
 247                 }
 248         }
 249 }
 250
 251 /* Form functions */
 252 void form_show(form_t *_form)
 253 {
 254         // Save form
 255         form = _form;
 256 }
 257
 258 void form_draw(WINDOW *_win)
 259 {
 260         // Save window
 261         win = _win;
 262
 263         // Validate everything
 264         if (!win || !form)
 265                 return;
 266
 267         // Calculate column width
 268         int col_size[form->cols];
 269         field_sizes(form, col_size);
 270
 271         // Make sure we have an active field
 272         if (!can_active(form, arow, acol))
 273                 move_active(form, 0, 0);
 274
 275         // Display form
 276         for (int r = 0; r < form->rows; r++) {
 277                 for (int c = 0; c < form->cols; c++) {
 278                         form_field_t *field = form->fields[r][c];
 279                         // Calculate form field size
 280                         int width = col_size[c];
 281                         for (int i = c+1; i < form->cols; i++) {
 282                                 if (form->fields[r][i])
 283                                         break;
 284                                 width += col_size[i];
 285                         }
 286                         // Draw the field
 287                         if (field)
 288                                 field_draw(field, width, is_active(form, r, c));
 289                         else if (c == 0)
 290                                 wprintw(win, "%*s", width, "");
 291                 }
 292                 wprintw(win, "\n");
 293         }
 294 }
 295
 296 int form_run(int key, mmask_t btn, int row, int col)
 297 {
 298         // Validate everything
 299         if (!form)
 300                 return 0;
 301
 302         // Check movement keys
 303         switch (key) {
 304                 case 'h': move_active(form,  0, -1); goto redraw;
 305                 case 'j': move_active(form,  1,  0); goto redraw;
 306                 case 'k': move_active(form, -1,  0); goto redraw;
 307                 case 'l': move_active(form,  0,  1); goto redraw;
 308         }
 309
 310         // Handle mouse movement
 311         if (key == KEY_MOUSE && row < form->rows) {
 312                 int pos=0, col_size[form->cols];
 313                 field_sizes(form, col_size);
 314                 for (int c = 0; c < form->cols; c++) {
 315                         if (pos < col && col < pos+col_size[c]) {
 316                                 if (can_active(form, row, c)) {
 317                                         arow = row;
 318                                         acol = c;
 319                                         goto redraw;
 320                                 }
 321                         }
 322                         pos += col_size[c];
 323                 }
 324         }
 325
 326         // Search for hotkeys
 327         for (int r = 0; r < form->rows; r++)
 328         for (int c = 0; c < form->cols; c++)
 329                 if (form->fields[r][c] &&
 330                     form->fields[r][c]->hotkey == key) {
 331                         arow = r;
 332                         acol = c;
 333                         goto redraw;
 334                 }
 335         return 0;
 336
 337 redraw:
 338         werase(win);
 339         form_draw(win);
 340         wrefresh(win);
 341         return 1;
 342 }
 343
 344 /* Test functions */
 345 static form_text_t   title     = TEXT('t');
 346 static form_text_t   location  = TEXT('o');
 347 static form_date_t   start     = DATE('s');
 348 static form_date_t   end       = DATE('e');
 349 static form_date_t   due_date  = DATE('u');
 350 static form_number_t completed = NUMBER('p', .f.after="%");
 351 static form_list_t   calendar  = LIST('c');
 352 static form_list_t   category  = LIST('g');
 353 static form_list_t   repeat    = LIST('r');
 354 static form_number_t frequency = NUMBER(0);
 355 static form_button_t weekdays  = BUTTONS("Su Mo Tu We Th Fr Sa");
 356 static form_text_t   details   = TEXT('d');
 357
 358 static form_t edit = { 12, 4, {
 359         { LABEL("_Title: "),    &title.f                                           },
 360         { LABEL("L_ocation: "), &location.f                                        },
 361         {                                                                          },
 362         { LABEL("_Start: "),    &start.f,    LABEL("  _End: "),       &end.f       },
 363         { LABEL("D_ue Date: "), &due_date.f, LABEL("  Com_pleted: "), &completed.f },
 364         { LABEL("_Calendar: "), &calendar.f, LABEL("  Cate_gory: "),  &category.f  },
 365         {                                                                          },
 366         { LABEL("_Repeat: "),   &repeat.f,   LABEL("  Every: "),      &frequency.f },
 367         {                                                                          },
 368         { NULL,                 &weekdays.f                                        },
 369         {                                                                          },
 370         { LABEL("_Details: "),  &details.f                                         },
 371 } };
 372
 373 void form_test(void)
 374 {
 375         /* Setup Curses */
 376         initscr();
 377         cbreak();
 378         noecho();
 379         keypad(stdscr, TRUE);
 380         start_color();
 381         curs_set(false);
 382         timeout(100);
 383         use_default_colors();
 384         mousemask(ALL_MOUSE_EVENTS, NULL);
 385
 386         /* Init */
 387         win = newwin(LINES, COLS, 0, 0);
 388         form_show(&edit);
 389
 390         /* Run */
 391         while (1) {
 392                 MEVENT btn;
 393                 int chr = getch();
 394                 if (chr == 'q')
 395                         break;
 396                 if (chr == KEY_MOUSE)
 397                         if (getmouse(&btn) != OK)
 398                                 continue;
 399                 switch (chr) {
 400                         case KEY_RESIZE:
 401                                 mvwin(win, 0, 0);
 402                                 wresize(win, LINES, COLS);
 403                                 refresh();
 404                                 werase(win);
 405                                 form_draw(win);
 406                                 wrefresh(win);
 407                                 continue;
 408                         case '\14': // Ctrl-L
 409                                 clear();
 410                         case '\7':  // Ctrl-G
 411                                 refresh();
 412                                 werase(win);
 413                                 form_draw(win);
 414                                 wrefresh(win);
 415                                 continue;
 416                 }
 417                 if (form_run(chr, btn.bstate, btn.y, btn.x))
 418                         continue;
 419                 if (chr == ERR) // timeout
 420                         continue;
 421         }
 422
 423         /* Finish */
 424         endwin();
 425 }