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
|
/*
* Calcurse - text-based organizer
*
* Copyright (c) 2004-2011 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 "calcurse.h"
/* Print the string at the desired position. */
static void
showstring (WINDOW *win, int x, int y, char *str, int len, int scroff,
int curpos)
{
char c = 0;
/* print string */
mvwaddnstr (win, y, x, &str[scroff], -1);
wclrtoeol (win);
/* print scrolling indicator */
if (scroff > 0 && scroff < len - col)
c = '*';
else if (scroff > 0)
c = '<';
else if (scroff < len - col)
c = '>';
mvwprintw (win, y, col - 1, "%c", c);
/* print cursor */
wmove (win, y, curpos - scroff);
if (curpos >= len)
waddch (win, SPACE | A_REVERSE);
else
waddch (win, str[curpos] | A_REVERSE);
}
/* Delete a character at the given position in string. */
static void
del_char (int pos, char *str)
{
str += pos;
memmove (str, str + 1, strlen (str) + 1);
}
/* Add a character at the given position in string. */
static void
ins_char (int pos, int ch, char *str)
{
str += pos;
memmove (str + 1, str, strlen (str) + 1);
*str = ch;
}
static void
bell (void)
{
printf ("\a");
}
/*
* Getstring allows to get user input and to print it on a window,
* even if noecho() is on. This function is also used to modify an existing
* text (the variable string can be non-NULL).
* We need to do the echoing manually because of the multi-threading
* environment, otherwise the cursor would move from place to place without
* control.
*/
enum getstr
getstring (WINDOW *win, char *str, int l, int x, int y)
{
const int pgsize = col / 3;
int len = strlen (str);
int curpos = len;
int scroff = 0;
int ch;
custom_apply_attr (win, ATTR_HIGHEST);
for (;;) {
while (curpos < scroff)
scroff -= pgsize;
while (curpos >= scroff + col - 1)
scroff += pgsize;
showstring (win, x, y, str, len, scroff, curpos);
wins_doupdate ();
if ((ch = wgetch (win)) == '\n') break;
switch (ch)
{
case KEY_BACKSPACE: /* delete one character */
case 330:
case 127:
case CTRL ('H'):
if (curpos > 0)
{
del_char ((--curpos), str);
len--;
}
else
bell ();
break;
case CTRL ('D'): /* delete next character */
if (curpos < len)
{
del_char (curpos, str);
len--;
}
else
bell ();
break;
case CTRL ('W'): /* delete a word */
if (curpos > 0) {
while (curpos && str[curpos - 1] == ' ')
{
del_char ((--curpos), str);
len--;
}
while (curpos && str[curpos - 1] != ' ')
{
del_char ((--curpos), str);
len--;
}
}
else
bell ();
break;
case CTRL ('K'): /* delete to end-of-line */
str[curpos] = 0;
len = curpos;
break;
case CTRL ('A'): /* go to begginning of string */
curpos = 0;
break;
case CTRL ('E'): /* go to end of string */
curpos = len;
break;
case KEY_LEFT: /* move one char backward */
case CTRL ('B'):
if (curpos > 0) curpos--;
break;
case KEY_RIGHT: /* move one char forward */
case CTRL ('F'):
if (curpos < len) curpos++;
break;
case ESCAPE: /* cancel editing */
return (GETSTRING_ESC);
break;
default: /* insert one character */
if (len < l - 1)
{
ins_char ((curpos++), ch, str);
len++;
}
}
}
custom_remove_attr (win, ATTR_HIGHEST);
return (len == 0 ? GETSTRING_RET : GETSTRING_VALID);
}
/* Update an already existing string. */
int
updatestring (WINDOW *win, char **str, int x, int y)
{
int len = strlen (*str);
char *buf;
enum getstr ret;
EXIT_IF (len + 1 > BUFSIZ, _("Internal error: line too long"));
buf = mem_malloc (BUFSIZ);
(void)memcpy (buf, *str, len + 1);
ret = getstring (win, buf, BUFSIZ, x, y);
if (ret == GETSTRING_VALID)
{
len = strlen (buf);
*str = mem_realloc (*str, len + 1, 1);
EXIT_IF (*str == NULL, _("out of memory"));
(void)memcpy (*str, buf, len + 1);
}
mem_free (buf);
return ret;
}
|
