1 // Copyright 2017 The TCell Authors
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use file except in compliance with the License.
5 // You may obtain a copy of the license at
7 // http://www.apache.org/licenses/LICENSE-2.0
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
15 // This command is used to generate suitable configuration files in either
16 // go syntax or in JSON. It defaults to JSON output on stdout. If no
17 // term values are specified on the command line, then $TERM is used.
19 // Usage is like this:
21 // mkinfo [-init] [-go file.go] [-json file.json] [-quiet] [-nofatal] [<term>...]
23 // -gzip specifies output should be compressed (json only)
24 // -go specifies Go output into the named file. Use - for stdout.
25 // -json specifies JSON output in the named file. Use - for stdout
26 // -nofatal indicates that errors loading definitions should not be fatal
50 strs map[string]string
53 func (tc *termcap) getnum(s string) int {
57 func (tc *termcap) getflag(s string) bool {
61 func (tc *termcap) getstr(s string) string {
71 func unescape(s string) string {
72 // Various escapes are in \x format. Control codes are
73 // encoded as ^M (carat followed by ASCII equivalent).
74 // Escapes are: \e, \E - escape
75 // \0 NULL, \n \l \r \t \b \f \s for equivalent C escape.
76 buf := &bytes.Buffer{}
79 for i := 0; i < len(s); i++ {
92 buf.WriteByte(c - 0x40)
98 case '0', '1', '2', '3', '4', '5', '6', '7':
99 if i+2 < len(s) && s[i+1] >= '0' && s[i+1] <= '7' && s[i+2] >= '0' && s[i+2] <= '7' {
100 buf.WriteByte(((c - '0') * 64) + ((s[i+1] - '0') * 8) + (s[i+2] - '0'))
118 panic("WTF: weird format: " + s)
125 return (buf.String())
128 func (tc *termcap) setupterm(name string) error {
129 cmd := exec.Command("infocmp", "-1", name)
130 output := &bytes.Buffer{}
133 tc.strs = make(map[string]string)
134 tc.bools = make(map[string]bool)
135 tc.nums = make(map[string]int)
142 // Now parse the output.
143 // We get comment lines (starting with "#"), followed by
144 // a header line that looks like "<name>|<alias>|...|<desc>"
145 // then capabilities, one per line, starting with a tab and ending
146 // with a comma and newline.
147 lines := strings.Split(output.String(), "\n")
148 for len(lines) > 0 && strings.HasPrefix(lines[0], "#") {
152 // Ditch trailing empty last line
153 if lines[len(lines)-1] == "" {
154 lines = lines[:len(lines)-1]
157 if strings.HasSuffix(header, ",") {
158 header = header[:len(header)-1]
160 names := strings.Split(header, "|")
164 tc.desc = names[len(names)-1]
165 names = names[:len(names)-1]
168 for _, val := range lines[1:] {
169 if (!strings.HasPrefix(val, "\t")) ||
170 (!strings.HasSuffix(val, ",")) {
171 return (errors.New("malformed infocmp: " + val))
175 val = val[:len(val)-1]
177 if k := strings.SplitN(val, "=", 2); len(k) == 2 {
178 tc.strs[k[0]] = unescape(k[1])
179 } else if k := strings.SplitN(val, "#", 2); len(k) == 2 {
180 if u, err := strconv.ParseUint(k[1], 10, 0); err != nil {
183 tc.nums[k[0]] = int(u)
192 // This program is used to collect data from the system's terminfo library,
193 // and write it into Go source code. That is, we maintain our terminfo
194 // capabilities encoded in the program. It should never need to be run by
195 // an end user, but developers can use this to add codes for additional
198 // If a terminal name ending with -truecolor is given, and we cannot find
199 // one, we will try to fabricate one from either the -256color (if present)
200 // or the unadorned base name, adding the XTerm specific 24-bit color
201 // escapes. We believe that all 24-bit capable terminals use the same
202 // escape sequences, and terminfo has yet to evolve to support this.
203 func getinfo(name string) (*Terminfo, string, error) {
205 addTrueColor := false
206 if err := tc.setupterm(name); err != nil {
207 if strings.HasSuffix(name, "-truecolor") {
208 base := name[:len(name)-len("-truecolor")]
209 // Probably -256color is closest to what we want
210 if err = tc.setupterm(base + "-256color"); err != nil {
211 err = tc.setupterm(base)
223 // If this is an alias record, then just emit the alias
228 t.Aliases = tc.aliases
229 t.Colors = tc.getnum("colors")
230 t.Columns = tc.getnum("cols")
231 t.Lines = tc.getnum("lines")
232 t.Bell = tc.getstr("bel")
233 t.Clear = tc.getstr("clear")
234 t.EnterCA = tc.getstr("smcup")
235 t.ExitCA = tc.getstr("rmcup")
236 t.ShowCursor = tc.getstr("cnorm")
237 t.HideCursor = tc.getstr("civis")
238 t.AttrOff = tc.getstr("sgr0")
239 t.Underline = tc.getstr("smul")
240 t.Bold = tc.getstr("bold")
241 t.Blink = tc.getstr("blink")
242 t.Dim = tc.getstr("dim")
243 t.Reverse = tc.getstr("rev")
244 t.EnterKeypad = tc.getstr("smkx")
245 t.ExitKeypad = tc.getstr("rmkx")
246 t.SetFg = tc.getstr("setaf")
247 t.SetBg = tc.getstr("setab")
248 t.SetCursor = tc.getstr("cup")
249 t.CursorBack1 = tc.getstr("cub1")
250 t.CursorUp1 = tc.getstr("cuu1")
251 t.KeyF1 = tc.getstr("kf1")
252 t.KeyF2 = tc.getstr("kf2")
253 t.KeyF3 = tc.getstr("kf3")
254 t.KeyF4 = tc.getstr("kf4")
255 t.KeyF5 = tc.getstr("kf5")
256 t.KeyF6 = tc.getstr("kf6")
257 t.KeyF7 = tc.getstr("kf7")
258 t.KeyF8 = tc.getstr("kf8")
259 t.KeyF9 = tc.getstr("kf9")
260 t.KeyF10 = tc.getstr("kf10")
261 t.KeyF11 = tc.getstr("kf11")
262 t.KeyF12 = tc.getstr("kf12")
263 t.KeyF13 = tc.getstr("kf13")
264 t.KeyF14 = tc.getstr("kf14")
265 t.KeyF15 = tc.getstr("kf15")
266 t.KeyF16 = tc.getstr("kf16")
267 t.KeyF17 = tc.getstr("kf17")
268 t.KeyF18 = tc.getstr("kf18")
269 t.KeyF19 = tc.getstr("kf19")
270 t.KeyF20 = tc.getstr("kf20")
271 t.KeyF21 = tc.getstr("kf21")
272 t.KeyF22 = tc.getstr("kf22")
273 t.KeyF23 = tc.getstr("kf23")
274 t.KeyF24 = tc.getstr("kf24")
275 t.KeyF25 = tc.getstr("kf25")
276 t.KeyF26 = tc.getstr("kf26")
277 t.KeyF27 = tc.getstr("kf27")
278 t.KeyF28 = tc.getstr("kf28")
279 t.KeyF29 = tc.getstr("kf29")
280 t.KeyF30 = tc.getstr("kf30")
281 t.KeyF31 = tc.getstr("kf31")
282 t.KeyF32 = tc.getstr("kf32")
283 t.KeyF33 = tc.getstr("kf33")
284 t.KeyF34 = tc.getstr("kf34")
285 t.KeyF35 = tc.getstr("kf35")
286 t.KeyF36 = tc.getstr("kf36")
287 t.KeyF37 = tc.getstr("kf37")
288 t.KeyF38 = tc.getstr("kf38")
289 t.KeyF39 = tc.getstr("kf39")
290 t.KeyF40 = tc.getstr("kf40")
291 t.KeyF41 = tc.getstr("kf41")
292 t.KeyF42 = tc.getstr("kf42")
293 t.KeyF43 = tc.getstr("kf43")
294 t.KeyF44 = tc.getstr("kf44")
295 t.KeyF45 = tc.getstr("kf45")
296 t.KeyF46 = tc.getstr("kf46")
297 t.KeyF47 = tc.getstr("kf47")
298 t.KeyF48 = tc.getstr("kf48")
299 t.KeyF49 = tc.getstr("kf49")
300 t.KeyF50 = tc.getstr("kf50")
301 t.KeyF51 = tc.getstr("kf51")
302 t.KeyF52 = tc.getstr("kf52")
303 t.KeyF53 = tc.getstr("kf53")
304 t.KeyF54 = tc.getstr("kf54")
305 t.KeyF55 = tc.getstr("kf55")
306 t.KeyF56 = tc.getstr("kf56")
307 t.KeyF57 = tc.getstr("kf57")
308 t.KeyF58 = tc.getstr("kf58")
309 t.KeyF59 = tc.getstr("kf59")
310 t.KeyF60 = tc.getstr("kf60")
311 t.KeyF61 = tc.getstr("kf61")
312 t.KeyF62 = tc.getstr("kf62")
313 t.KeyF63 = tc.getstr("kf63")
314 t.KeyF64 = tc.getstr("kf64")
315 t.KeyInsert = tc.getstr("kich1")
316 t.KeyDelete = tc.getstr("kdch1")
317 t.KeyBackspace = tc.getstr("kbs")
318 t.KeyHome = tc.getstr("khome")
319 t.KeyEnd = tc.getstr("kend")
320 t.KeyUp = tc.getstr("kcuu1")
321 t.KeyDown = tc.getstr("kcud1")
322 t.KeyRight = tc.getstr("kcuf1")
323 t.KeyLeft = tc.getstr("kcub1")
324 t.KeyPgDn = tc.getstr("knp")
325 t.KeyPgUp = tc.getstr("kpp")
326 t.KeyBacktab = tc.getstr("kcbt")
327 t.KeyExit = tc.getstr("kext")
328 t.KeyCancel = tc.getstr("kcan")
329 t.KeyPrint = tc.getstr("kprt")
330 t.KeyHelp = tc.getstr("khlp")
331 t.KeyClear = tc.getstr("kclr")
332 t.AltChars = tc.getstr("acsc")
333 t.EnterAcs = tc.getstr("smacs")
334 t.ExitAcs = tc.getstr("rmacs")
335 t.EnableAcs = tc.getstr("enacs")
336 t.Mouse = tc.getstr("kmous")
337 t.KeyShfRight = tc.getstr("kRIT")
338 t.KeyShfLeft = tc.getstr("kLFT")
339 t.KeyShfHome = tc.getstr("kHOM")
340 t.KeyShfEnd = tc.getstr("kEND")
342 // Terminfo lacks descriptions for a bunch of modified keys,
343 // but modern XTerm and emulators often have them. Let's add them,
344 // if the shifted right and left arrows are defined.
345 if t.KeyShfRight == "\x1b[1;2C" && t.KeyShfLeft == "\x1b[1;2D" {
346 t.KeyShfUp = "\x1b[1;2A"
347 t.KeyShfDown = "\x1b[1;2B"
348 t.KeyMetaUp = "\x1b[1;9A"
349 t.KeyMetaDown = "\x1b[1;9B"
350 t.KeyMetaRight = "\x1b[1;9C"
351 t.KeyMetaLeft = "\x1b[1;9D"
352 t.KeyAltUp = "\x1b[1;3A"
353 t.KeyAltDown = "\x1b[1;3B"
354 t.KeyAltRight = "\x1b[1;3C"
355 t.KeyAltLeft = "\x1b[1;3D"
356 t.KeyCtrlUp = "\x1b[1;5A"
357 t.KeyCtrlDown = "\x1b[1;5B"
358 t.KeyCtrlRight = "\x1b[1;5C"
359 t.KeyCtrlLeft = "\x1b[1;5D"
360 t.KeyAltShfUp = "\x1b[1;4A"
361 t.KeyAltShfDown = "\x1b[1;4B"
362 t.KeyAltShfRight = "\x1b[1;4C"
363 t.KeyAltShfLeft = "\x1b[1;4D"
365 t.KeyMetaShfUp = "\x1b[1;10A"
366 t.KeyMetaShfDown = "\x1b[1;10B"
367 t.KeyMetaShfRight = "\x1b[1;10C"
368 t.KeyMetaShfLeft = "\x1b[1;10D"
370 t.KeyCtrlShfUp = "\x1b[1;6A"
371 t.KeyCtrlShfDown = "\x1b[1;6B"
372 t.KeyCtrlShfRight = "\x1b[1;6C"
373 t.KeyCtrlShfLeft = "\x1b[1;6D"
375 // And also for Home and End
376 if t.KeyShfHome == "\x1b[1;2H" && t.KeyShfEnd == "\x1b[1;2F" {
377 t.KeyCtrlHome = "\x1b[1;5H"
378 t.KeyCtrlEnd = "\x1b[1;5F"
379 t.KeyAltHome = "\x1b[1;9H"
380 t.KeyAltEnd = "\x1b[1;9F"
381 t.KeyCtrlShfHome = "\x1b[1;6H"
382 t.KeyCtrlShfEnd = "\x1b[1;6F"
383 t.KeyAltShfHome = "\x1b[1;4H"
384 t.KeyAltShfEnd = "\x1b[1;4F"
385 t.KeyMetaShfHome = "\x1b[1;10H"
386 t.KeyMetaShfEnd = "\x1b[1;10F"
389 // And the same thing for rxvt and workalikes (Eterm, aterm, etc.)
390 // It seems that urxvt at least send ESC as ALT prefix for these,
391 // although some places seem to indicate a separate ALT key sesquence.
392 if t.KeyShfRight == "\x1b[c" && t.KeyShfLeft == "\x1b[d" {
393 t.KeyShfUp = "\x1b[a"
394 t.KeyShfDown = "\x1b[b"
395 t.KeyCtrlUp = "\x1b[Oa"
396 t.KeyCtrlDown = "\x1b[Ob"
397 t.KeyCtrlRight = "\x1b[Oc"
398 t.KeyCtrlLeft = "\x1b[Od"
400 if t.KeyShfHome == "\x1b[7$" && t.KeyShfEnd == "\x1b[8$" {
401 t.KeyCtrlHome = "\x1b[7^"
402 t.KeyCtrlEnd = "\x1b[8^"
405 // If the kmous entry is present, then we need to record the
406 // the codes to enter and exit mouse mode. Sadly, this is not
407 // part of the terminfo databases anywhere that I've found, but
408 // is an extension. The escape codes are documented in the XTerm
409 // manual, and all terminals that have kmous are expected to
410 // use these same codes, unless explicitly configured otherwise
411 // vi XM. Note that in any event, we only known how to parse either
412 // x11 or SGR mouse events -- if your terminal doesn't support one
413 // of these two forms, you maybe out of luck.
414 t.MouseMode = tc.getstr("XM")
415 if t.Mouse != "" && t.MouseMode == "" {
416 // we anticipate that all xterm mouse tracking compatible
417 // terminals understand mouse tracking (1000), but we hope
418 // that those that don't understand any-event tracking (1003)
419 // will at least ignore it. Likewise we hope that terminals
420 // that don't understand SGR reporting (1006) just ignore it.
421 t.MouseMode = "%?%p1%{1}%=%t%'h'%Pa%e%'l'%Pa%;" +
422 "\x1b[?1000%ga%c\x1b[?1002%ga%c\x1b[?1003%ga%c\x1b[?1006%ga%c"
425 // We only support colors in ANSI 8 or 256 color mode.
426 if t.Colors < 8 || t.SetFg == "" {
429 if t.SetCursor == "" {
430 return nil, "", errors.New("terminal not cursor addressable")
433 // For padding, we lookup the pad char. If that isn't present,
434 // and npc is *not* set, then we assume a null byte.
435 t.PadChar = tc.getstr("pad")
437 if !tc.getflag("npc") {
442 // For some terminals we fabricate a -truecolor entry, that may
443 // not exist in terminfo.
445 t.SetFgRGB = "\x1b[38;2;%p1%d;%p2%d;%p3%dm"
446 t.SetBgRGB = "\x1b[48;2;%p1%d;%p2%d;%p3%dm"
447 t.SetFgBgRGB = "\x1b[38;2;%p1%d;%p2%d;%p3%d;" +
448 "48;2;%p4%d;%p5%d;%p6%dm"
451 // For terminals that use "standard" SGR sequences, lets combine the
452 // foreground and background together.
453 if strings.HasPrefix(t.SetFg, "\x1b[") &&
454 strings.HasPrefix(t.SetBg, "\x1b[") &&
455 strings.HasSuffix(t.SetFg, "m") &&
456 strings.HasSuffix(t.SetBg, "m") {
457 fg := t.SetFg[:len(t.SetFg)-1]
458 r := regexp.MustCompile("%p1")
459 bg := r.ReplaceAllString(t.SetBg[2:], "%p2")
460 t.SetFgBg = fg + ";" + bg
463 return t, tc.desc, nil
466 func WriteDB(filename string) error {
469 args := []string{os.Getenv("TERM")}
471 tdata := make(map[string]*Terminfo)
472 descs := make(map[string]string)
474 for _, term := range args {
475 if t, desc, e := getinfo(term); e != nil {
485 return errors.New("No data")
488 if o, e = os.Create(filename); e != nil {
493 for _, term := range args {
494 if t := tdata[term]; t != nil {
495 js, e = json.Marshal(t)
496 fmt.Fprintln(w, string(js))
498 // arguably if there is more than one term, this
499 // should be a javascript array, but that's not how
500 // we load it. We marshal objects one at a time from