aboutsummaryrefslogtreecommitdiffstats
path: root/src/todo.c
blob: af25a608c6739f0b27a3fffefbe5e3c492d00748 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
/*
 * Calcurse - text-based organizer
 *
 * Copyright (c) 2004-2012 calcurse Development Team <misc@calcurse.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the
 *        following disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the
 *        following disclaimer in the documentation and/or other
 *        materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Send your feedback or comments to : misc@calcurse.org
 * Calcurse home page : http://calcurse.org
 *
 */

#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "calcurse.h"

llist_t todolist;
static int hilt = 0;
static int todos = 0;
static int first = 1;
static char *msgsav;

/* Returns a structure containing the selected item. */
struct todo *todo_get_item(int item_number)
{
  return LLIST_GET_DATA(LLIST_NTH(&todolist, item_number - 1));
}

/* Sets which todo is highlighted. */
void todo_hilt_set(int highlighted)
{
  hilt = highlighted;
}

void todo_hilt_decrease(int n)
{
  hilt -= n;
}

void todo_hilt_increase(int n)
{
  hilt += n;
}

/* Return which todo is highlighted. */
int todo_hilt(void)
{
  return hilt;
}

/* Return the number of todos. */
int todo_nb(void)
{
  return todos;
}

/* Set the number of todos. */
void todo_set_nb(int nb)
{
  todos = nb;
}

/* Set which one is the first todo to be displayed. */
void todo_set_first(int nb)
{
  first = nb;
}

void todo_first_increase(int n)
{
  first += n;
}

void todo_first_decrease(int n)
{
  first -= n;
}

/*
 * Return the position of the hilghlighted item, relative to the first one
 * displayed.
 */
int todo_hilt_pos(void)
{
  return hilt - first;
}

/* Return the last visited todo. */
char *todo_saved_mesg(void)
{
  return msgsav;
}

static int todo_cmp_id(struct todo *a, struct todo *b)
{
  /*
   * As of version 2.6, todo items can have a negative id, which means they
   * were completed. To keep them sorted, we need to consider the absolute id
   * value.
   */
  int abs_a = abs(a->id);
  int abs_b = abs(b->id);

  return abs_a < abs_b ? -1 : (abs_a == abs_b ? 0 : 1);
}

/*
 * Add an item in the todo linked list.
 */
struct todo *todo_add(char *mesg, int id, char *note)
{
  struct todo *todo;

  todo = mem_malloc(sizeof(struct todo));
  todo->mesg = mem_strdup(mesg);
  todo->id = id;
  todo->note = (note != NULL && note[0] != '\0') ? mem_strdup(note) : NULL;

  LLIST_ADD_SORTED(&todolist, todo, todo_cmp_id);

  return todo;
}

void todo_write(struct todo *todo, FILE * f)
{
  if (todo->note)
    fprintf(f, "[%d]>%s %s\n", todo->id, todo->note, todo->mesg);
  else
    fprintf(f, "[%d] %s\n", todo->id, todo->mesg);
}

/* Delete a note previously attached to a todo item. */
void todo_delete_note(struct todo *todo)
{
  if (!todo->note)
    EXIT(_("no note attached"));
  erase_note(&todo->note);
}

/* Delete an item from the todo linked list. */
void todo_delete(struct todo *todo)
{
  llist_item_t *i = LLIST_FIND_FIRST(&todolist, todo, NULL);

  if (!i)
    EXIT(_("no such todo"));

  LLIST_REMOVE(&todolist, i);
  mem_free(todo->mesg);
  erase_note(&todo->note);
  mem_free(todo);
}

/*
 * Flag a todo item (for now on, only the 'completed' state is available).
 * Internally, a completed item keeps its priority, but it becomes negative.
 * This way, it is easy to retrive its original priority if the user decides
 * that in fact it was not completed.
 */
void todo_flag(struct todo *t)
{
  t->id = -t->id;
}

/*
 * Returns the position into the linked list corresponding to the
 * given todo item.
 */
static int todo_get_position(struct todo *needle)
{
  llist_item_t *i;
  int n = 0;

  LLIST_FOREACH(&todolist, i) {
    n++;
    if (LLIST_TS_GET_DATA(i) == needle)
      return n;
  }

  EXIT(_("todo not found"));
  return -1;                    /* avoid compiler warnings */
}

/* Change an item priority by pressing '+' or '-' inside TODO panel. */
void todo_chg_priority(struct todo *backup, int diff)
{
  char backup_mesg[BUFSIZ];
  int backup_id;
  char backup_note[MAX_NOTESIZ + 1];

  strncpy(backup_mesg, backup->mesg, strlen(backup->mesg) + 1);
  backup_id = backup->id;
  if (backup->note)
    strncpy(backup_note, backup->note, MAX_NOTESIZ + 1);
  else
    backup_note[0] = '\0';

  backup_id += diff;
  if (backup_id < 1)
    backup_id = 1;
  else if (backup_id > 9)
    backup_id = 9;

  todo_delete(todo_get_item(hilt));
  backup = todo_add(backup_mesg, backup_id, backup_note);
  hilt = todo_get_position(backup);
}

/* Display todo items in the corresponding panel. */
static void
display_todo_item(int incolor, char *msg, int prio, int note, int width, int y,
                  int x)
{
  WINDOW *w;
  int ch_note;
  char buf[width * UTF8_MAXLEN], priostr[2];
  int i;

  w = win[TOD].p;
  ch_note = (note) ? '>' : '.';
  if (prio > 0)
    snprintf(priostr, sizeof priostr, "%d", prio);
  else
    strncpy(priostr, "X", sizeof priostr);

  if (incolor == 0)
    custom_apply_attr(w, ATTR_HIGHEST);
  if (utf8_strwidth(msg) < width)
    mvwprintw(w, y, x, "%s%c %s", priostr, ch_note, msg);
  else {
    for (i = 0; msg[i] && width > 0; i++) {
      if (!UTF8_ISCONT(msg[i]))
        width -= utf8_width(&msg[i]);
      buf[i] = msg[i];
    }
    if (i)
      buf[i - 1] = 0;
    else
      buf[0] = 0;
    mvwprintw(w, y, x, "%s%c %s...", priostr, ch_note, buf);
  }
  if (incolor == 0)
    custom_remove_attr(w, ATTR_HIGHEST);
}

/* Updates the ToDo panel. */
void todo_update_panel(int which_pan)
{
  llist_item_t *i;
  int len = win[TOD].w - 8;
  int num_todo = 0;
  int y_offset = 3, x_offset = 1;
  int t_realpos = -1;
  int title_lines = 3;
  int todo_lines = 1;
  int max_items = win[TOD].h - 4;
  int incolor = -1;

  /* Print todo item in the panel. */
  erase_window_part(win[TOD].p, 1, title_lines, win[TOD].w - 2, win[TOD].h - 2);
  LLIST_FOREACH(&todolist, i) {
    struct todo *todo = LLIST_TS_GET_DATA(i);
    num_todo++;
    t_realpos = num_todo - first;
    incolor = (which_pan == TOD) ? num_todo - hilt : num_todo;
    if (incolor == 0)
      msgsav = todo->mesg;
    if (t_realpos >= 0 && t_realpos < max_items) {
      display_todo_item(incolor, todo->mesg, todo->id,
                        (todo->note != NULL) ? 1 : 0, len, y_offset, x_offset);
      y_offset = y_offset + todo_lines;
    }
  }

  /* Draw the scrollbar if necessary. */
  if (todos > max_items) {
    int sbar_length = max_items * (max_items + 1) / todos;
    int highend = max_items * first / todos;
    unsigned hilt_bar = (which_pan == TOD) ? 1 : 0;
    int sbar_top = highend + title_lines;

    if ((sbar_top + sbar_length) > win[TOD].h - 1)
      sbar_length = win[TOD].h - 1 - sbar_top;
    draw_scrollbar(win[TOD].p, sbar_top, win[TOD].w - 2,
                   sbar_length, title_lines, win[TOD].h - 1, hilt_bar);
  }

  wnoutrefresh(win[TOD].p);
}

/* Attach a note to a todo */
void todo_edit_note(struct todo *i, const char *editor)
{
  edit_note(&i->note, editor);
}

/* View a note previously attached to a todo */
void todo_view_note(struct todo *i, const char *pager)
{
  view_note(i->note, pager);
}

void todo_free(struct todo *todo)
{
  mem_free(todo->mesg);
  erase_note(&todo->note);
  mem_free(todo);
}

void todo_init_list(void)
{
  LLIST_INIT(&todolist);
}

void todo_free_list(void)
{
  LLIST_FREE_INNER(&todolist, todo_free);
  LLIST_FREE(&todolist);
}