1 /* line editing and drawing */
9 static char *kmap_map(int kmap
, int c
)
12 char **keymap
= conf_kmap(kmap
);
14 return keymap
[c
] ? keymap
[c
] : cs
;
17 static int led_posctx(int dir
, int pos
, int beg
, int end
)
19 return dir
>= 0 ? pos
- beg
: end
- pos
- 1;
22 /* map cursor horizontal position to terminal column number */
23 int led_pos(char *s
, int pos
)
25 return led_posctx(dir_context(s
), pos
, xleft
, xleft
+ xcols
);
28 static int led_offdir(char **chrs
, int *pos
, int i
)
30 if (pos
[i
] + ren_cwid(chrs
[i
], pos
[i
]) == pos
[i
+ 1])
32 if (pos
[i
+ 1] + ren_cwid(chrs
[i
+ 1], pos
[i
+ 1]) == pos
[i
])
37 /* highlight text in reverse direction */
38 static void led_markrev(int n
, char **chrs
, int *pos
, int *att
)
42 conf_highlight_revdir(&hl
);
44 int dir
= led_offdir(chrs
, pos
, i
);
46 while (i
+ 1 < n
&& led_offdir(chrs
, pos
, i
) == dir
)
49 for (j
= beg
; j
<= i
; j
++)
50 att
[j
] = syn_merge(hl
, att
[j
]);
56 /* render and highlight a line */
57 static char *led_render(char *s0
, int cbeg
, int cend
, char *syn
)
60 int *pos
; /* pos[i]: the screen position of the i-th character */
61 int *off
; /* off[i]: the character at screen position i */
62 int *att
; /* att[i]: the attributes of i-th character */
63 char **chrs
; /* chrs[i]: the i-th character in s1 */
67 int ctx
= dir_context(s0
);
68 chrs
= uc_chop(s0
, &n
);
69 pos
= ren_position(s0
);
70 off
= malloc((cend
- cbeg
) * sizeof(off
[0]));
71 memset(off
, 0xff, (cend
- cbeg
) * sizeof(off
[0]));
72 for (i
= 0; i
< n
; i
++) {
73 int curwid
= ren_cwid(chrs
[i
], pos
[i
]);
74 int curbeg
= led_posctx(ctx
, pos
[i
], cbeg
, cend
);
75 int curend
= led_posctx(ctx
, pos
[i
] + curwid
- 1, cbeg
, cend
);
76 if (curbeg
>= 0 && curbeg
< (cend
- cbeg
) &&
77 curend
>= 0 && curend
< (cend
- cbeg
))
78 for (j
= 0; j
< curwid
; j
++)
79 off
[led_posctx(ctx
, pos
[i
] + j
, cbeg
, cend
)] = i
;
81 att
= syn_highlight(syn
, s0
);
82 led_markrev(n
, chrs
, pos
, att
);
86 int o
= off
[i
- cbeg
];
87 int att_new
= o
>= 0 ? att
[o
] : 0;
88 sbuf_str(out
, term_att(att_new
, att_old
));
91 if (ren_translate(chrs
[o
], s0
))
92 sbuf_str(out
, ren_translate(chrs
[o
], s0
));
93 else if (uc_isprint(chrs
[o
]))
94 sbuf_mem(out
, chrs
[o
], uc_len(chrs
[o
]));
96 for (j
= i
; j
< cend
&& off
[j
- cbeg
] == o
; j
++)
98 while (i
< cend
&& off
[i
- cbeg
] == o
)
105 sbuf_str(out
, term_att(0, att_old
));
110 return sbuf_done(out
);
113 /* print a line on the screen */
114 void led_print(char *s
, int row
)
116 char *r
= led_render(s
, xleft
, xleft
+ xcols
, ex_filetype());
123 /* set xtd and return its old value */
124 static int td_set(int td
)
131 /* print a line on the screen; for ex messages */
132 void led_printmsg(char *s
, int row
)
135 char *r
= led_render(s
, xleft
, xleft
+ xcols
, "---");
143 static int led_lastchar(char *s
)
145 char *r
= *s
? strchr(s
, '\0') : s
;
147 r
= uc_beg(s
, r
- 1);
151 static int led_lastword(char *s
)
153 char *r
= *s
? uc_beg(s
, strchr(s
, '\0') - 1) : s
;
155 while (r
> s
&& uc_isspace(r
))
156 r
= uc_beg(s
, r
- 1);
157 kind
= r
> s
? uc_kind(r
) : 0;
158 while (r
> s
&& uc_kind(uc_beg(s
, r
- 1)) == kind
)
159 r
= uc_beg(s
, r
- 1);
163 static void led_printparts(char *ai
, char *pref
, char *main
, char *post
, int kmap
)
172 off
= uc_slen(sbuf_buf(ln
));
173 /* cursor position for inserting the next character */
174 if (*pref
|| *main
|| *ai
) {
175 int len
= sbuf_len(ln
);
176 sbuf_str(ln
, kmap_map(kmap
, 'a'));
178 idir
= ren_pos(sbuf_buf(ln
), off
) -
179 ren_pos(sbuf_buf(ln
), off
- 1) < 0 ? -1 : +1;
184 pos
= ren_cursor(sbuf_buf(ln
), ren_pos(sbuf_buf(ln
), MAX(0, off
- 1)));
185 if (pos
>= xleft
+ xcols
)
186 xleft
= pos
- xcols
/ 2;
188 xleft
= pos
< xcols
? 0 : pos
- xcols
/ 2;
189 led_print(sbuf_buf(ln
), -1);
190 term_pos(-1, led_pos(sbuf_buf(ln
), pos
+ idir
));
195 /* continue reading the character starting with c */
196 static char *led_readchar(int c
, int kmap
)
201 if (c
== TK_CTL('v')) { /* literal character */
202 buf
[0] = term_read();
206 if (c
== TK_CTL('k')) { /* digraph */
213 return conf_digraph(c1
, c2
);
215 if ((c
& 0xc0) == 0xc0) { /* utf-8 character */
218 for (i
= 1; i
< n
; i
++)
219 buf
[i
] = term_read();
223 return kmap_map(kmap
, c
);
226 /* read a character from the terminal */
227 char *led_read(int *kmap
)
239 return led_readchar(c
, *kmap
);
246 /* read a line from the terminal */
247 static char *led_line(char *pref
, char *post
, char *ai
, int ai_max
, int *key
, int *kmap
)
250 int ai_len
= strlen(ai
);
259 led_printparts(ai
, pref
, sbuf_buf(sb
), post
, *kmap
);
271 sbuf_cut(sb
, led_lastchar(sbuf_buf(sb
)));
278 sbuf_cut(sb
, led_lastword(sbuf_buf(sb
)));
290 if (reg_get(0, &lnmode
))
291 sbuf_str(sb
, reg_get(0, &lnmode
));
294 if (c
== '\n' || TK_INT(c
))
296 if ((cs
= led_readchar(c
, *kmap
)))
299 if (c
== '\n' || TK_INT(c
))
303 return sbuf_done(sb
);
306 /* read an ex command */
307 char *led_prompt(char *pref
, char *post
, int *kmap
)
311 char *s
= led_line(pref
, post
, "", 0, &key
, kmap
);
314 struct sbuf
*sb
= sbuf_make();
321 return sbuf_done(sb
);
327 /* read visual command input */
328 char *led_input(char *pref
, char *post
, int *kmap
)
330 struct sbuf
*sb
= sbuf_make();
332 int ai_max
= xai
? sizeof(ai
) - 1 : 0;
335 while (n
< ai_max
&& (*pref
== ' ' || *pref
== '\t'))
339 char *ln
= led_line(pref
, post
, ai
, ai_max
, &key
, kmap
);
340 int ln_sp
= 0; /* number of initial spaces in ln */
341 while (ln
[ln_sp
] && (ln
[ln_sp
] == ' ' || ln
[ln_sp
] == '\t'))
343 if (ln
[ln_sp
] || (pref
&& pref
[0]) ||
344 (key
!= '\n' && post
[0] && post
[0] != '\n'))
351 led_printparts(ai
, pref
? pref
: "", uc_lastline(ln
),
352 key
== '\n' ? "" : post
, *kmap
);
355 if (!pref
|| !pref
[0]) { /* updating autoindent */
356 int ai_len
= ai_max
? strlen(ai
) : 0;
358 if (ai_len
+ ai_new
> ai_max
)
359 ai_new
= ai_max
- ai_len
;
360 memcpy(ai
+ ai_len
, ln
, ai_new
);
361 ai
[ai_len
+ ai_new
] = '\0';
369 while (xai
&& (post
[n
] == ' ' || post
[n
] == '\t'))
371 memmove(post
, post
+ n
, strlen(post
) - n
+ 1);
375 return sbuf_done(sb
);