blob: 28f61f4631e0bb3c5964db81382cb97a8de64c6b (
plain)
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
|
#include "input.h"
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include "file.h"
#include "row.h"
void editor_move_cursor(struct editor_state* editor, int key)
{
struct editor_row* row = (editor->cursor_y >= editor->row_count) ? NULL : &editor->rows[editor->cursor_y];
switch (key) {
case ARROW_LEFT:
if (editor->cursor_x != 0) {
editor->cursor_x--;
} else if (editor->cursor_y > 0) {
editor->cursor_y--;
editor->cursor_x = editor->rows[editor->cursor_y].size;
}
break;
case ARROW_RIGHT:
if (row && editor->cursor_x < row->size) {
editor->cursor_x++;
} else if (row && editor->cursor_x == row->size) {
editor->cursor_y++;
editor->cursor_x = 0;
}
break;
case ARROW_UP:
if (editor->cursor_y != 0) editor->cursor_y--;
break;
case ARROW_DOWN:
if (editor->cursor_y != editor->row_count - 1) editor->cursor_y++;
break;
}
row = (editor->cursor_y >= editor->row_count) ? NULL : &editor->rows[editor->cursor_y];
int row_length = row ? row->size : 0;
if (editor->cursor_x > row_length)
editor->cursor_x = row_length;
}
void editor_process_keypress(struct editor_state* editor, int c)
{
static int quit_message = 1;
switch (c) {
case '\r':
editor_insert_newline(editor);
break;
case CTRL_KEY('q'):
if (editor->dirty && quit_message) {
editor_set_status_message(editor, "This file has unsaved changes. Press Ctrl+Q again to quit");
quit_message = 0;
return;
}
exit(0);
break;
case CTRL_KEY('s'):
editor_save(editor);
break;
case HOME_KEY:
editor->cursor_x = 0;
break;
case END_KEY:
if (editor->cursor_y < editor->row_count)
editor->cursor_x = editor->rows[editor->cursor_y].size;
break;
case CTRL_KEY('f'):
editor_find(editor);
break;
case BACKSPACE:
case DELETE_KEY:
if (c == DELETE_KEY)
editor_move_cursor(editor, ARROW_RIGHT);
editor_delete_char(editor);
break;
case PAGE_UP:
case PAGE_DOWN:
{
if (c == PAGE_UP) {
editor->cursor_y = editor->row_offset;
} else {
editor->cursor_y = editor->row_offset + editor->screen_rows -1;
if (editor->cursor_y > editor->row_count)
editor->cursor_y = editor->row_count;
}
int times = editor->screen_rows;
while (times--)
editor_move_cursor(editor, c == PAGE_UP ? ARROW_UP : ARROW_DOWN);
}
break;
case ARROW_UP:
case ARROW_DOWN:
case ARROW_LEFT:
case ARROW_RIGHT:
editor_move_cursor(editor, c);
break;
case CTRL_KEY('l'):
case '\x1b':
break;
default:
editor_insert_char(editor, c);
break;
}
quit_message = 1;
}
|
