diff options
Diffstat (limited to 'vendor/maunium.net/go/tcell/terminfo/dyninfo.go')
| -rw-r--r-- | vendor/maunium.net/go/tcell/terminfo/dyninfo.go | 475 |
1 files changed, 475 insertions, 0 deletions
diff --git a/vendor/maunium.net/go/tcell/terminfo/dyninfo.go b/vendor/maunium.net/go/tcell/terminfo/dyninfo.go new file mode 100644 index 0000000..0be817c --- /dev/null +++ b/vendor/maunium.net/go/tcell/terminfo/dyninfo.go @@ -0,0 +1,475 @@ +// Copyright 2018 The TCell Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use file except in compliance with the License. +// You may obtain a copy of the license at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// This command is used to generate suitable configuration files in either +// go syntax or in JSON. It defaults to JSON output on stdout. If no +// term values are specified on the command line, then $TERM is used. +// +// Usage is like this: +// +// mkinfo [-init] [-go file.go] [-json file.json] [-quiet] [-nofatal] [<term>...] +// +// -all scan terminfo to determine database entries to use +// -db generate database entries (database/*), implied for -all +// -gzip specifies output should be compressed (json only) +// -go specifies Go output into the named file. Use - for stdout. +// -json specifies JSON output in the named file. Use - for stdout +// -nofatal indicates that errors loading definitions should not be fatal +// + +package terminfo + +import ( + "bytes" + "errors" + "os" + "os/exec" + "regexp" + "strconv" + "strings" +) + +type termcap struct { + name string + desc string + aliases []string + bools map[string]bool + nums map[string]int + strs map[string]string +} + +func (tc *termcap) getnum(s string) int { + return (tc.nums[s]) +} + +func (tc *termcap) getflag(s string) bool { + return (tc.bools[s]) +} + +func (tc *termcap) getstr(s string) string { + return (tc.strs[s]) +} + +const ( + NONE = iota + CTRL + ESC +) + +var notaddressable = errors.New("terminal not cursor addressable") + +func unescape(s string) string { + // Various escapes are in \x format. Control codes are + // encoded as ^M (carat followed by ASCII equivalent). + // Escapes are: \e, \E - escape + // \0 NULL, \n \l \r \t \b \f \s for equivalent C escape. + buf := &bytes.Buffer{} + esc := NONE + + for i := 0; i < len(s); i++ { + c := s[i] + switch esc { + case NONE: + switch c { + case '\\': + esc = ESC + case '^': + esc = CTRL + default: + buf.WriteByte(c) + } + case CTRL: + buf.WriteByte(c - 0x40) + esc = NONE + case ESC: + switch c { + case 'E', 'e': + buf.WriteByte(0x1b) + case '0', '1', '2', '3', '4', '5', '6', '7': + if i+2 < len(s) && s[i+1] >= '0' && s[i+1] <= '7' && s[i+2] >= '0' && s[i+2] <= '7' { + buf.WriteByte(((c - '0') * 64) + ((s[i+1] - '0') * 8) + (s[i+2] - '0')) + i = i + 2 + } else if c == '0' { + buf.WriteByte(0) + } + case 'n': + buf.WriteByte('\n') + case 'r': + buf.WriteByte('\r') + case 't': + buf.WriteByte('\t') + case 'b': + buf.WriteByte('\b') + case 'f': + buf.WriteByte('\f') + case 's': + buf.WriteByte(' ') + case 'l': + panic("WTF: weird format: " + s) + default: + buf.WriteByte(c) + } + esc = NONE + } + } + return (buf.String()) +} + +func (tc *termcap) setupterm(name string) error { + cmd := exec.Command("infocmp", "-1", name) + output := &bytes.Buffer{} + cmd.Stdout = output + + tc.strs = make(map[string]string) + tc.bools = make(map[string]bool) + tc.nums = make(map[string]int) + + err := cmd.Run() + if err != nil { + return err + } + + // Now parse the output. + // We get comment lines (starting with "#"), followed by + // a header line that looks like "<name>|<alias>|...|<desc>" + // then capabilities, one per line, starting with a tab and ending + // with a comma and newline. + lines := strings.Split(output.String(), "\n") + for len(lines) > 0 && strings.HasPrefix(lines[0], "#") { + lines = lines[1:] + } + + // Ditch trailing empty last line + if lines[len(lines)-1] == "" { + lines = lines[:len(lines)-1] + } + header := lines[0] + if strings.HasSuffix(header, ",") { + header = header[:len(header)-1] + } + names := strings.Split(header, "|") + tc.name = names[0] + names = names[1:] + if len(names) > 0 { + tc.desc = names[len(names)-1] + names = names[:len(names)-1] + } + tc.aliases = names + for _, val := range lines[1:] { + if (!strings.HasPrefix(val, "\t")) || + (!strings.HasSuffix(val, ",")) { + return (errors.New("malformed infocmp: " + val)) + } + + val = val[1:] + val = val[:len(val)-1] + + if k := strings.SplitN(val, "=", 2); len(k) == 2 { + tc.strs[k[0]] = unescape(k[1]) + } else if k := strings.SplitN(val, "#", 2); len(k) == 2 { + if u, err := strconv.ParseUint(k[1], 0, 0); err != nil { + return (err) + } else { + tc.nums[k[0]] = int(u) + } + } else { + tc.bools[val] = true + } + } + return nil +} + +// This program is used to collect data from the system's terminfo library, +// and write it into Go source code. That is, we maintain our terminfo +// capabilities encoded in the program. It should never need to be run by +// an end user, but developers can use this to add codes for additional +// terminal types. +// +// If a terminal name ending with -truecolor is given, and we cannot find +// one, we will try to fabricate one from either the -256color (if present) +// or the unadorned base name, adding the XTerm specific 24-bit color +// escapes. We believe that all 24-bit capable terminals use the same +// escape sequences, and terminfo has yet to evolve to support this. +func getinfo(name string) (*Terminfo, string, error) { + var tc termcap + addTrueColor := false + if err := tc.setupterm(name); err != nil { + if strings.HasSuffix(name, "-truecolor") { + base := name[:len(name)-len("-truecolor")] + // Probably -256color is closest to what we want + if err = tc.setupterm(base + "-256color"); err != nil { + err = tc.setupterm(base) + } + if err == nil { + addTrueColor = true + } + tc.name = name + } + if err != nil { + return nil, "", err + } + } + t := &Terminfo{} + // If this is an alias record, then just emit the alias + t.Name = tc.name + if t.Name != name { + return t, "", nil + } + t.Aliases = tc.aliases + t.Colors = tc.getnum("colors") + t.Columns = tc.getnum("cols") + t.Lines = tc.getnum("lines") + t.Bell = tc.getstr("bel") + t.Clear = tc.getstr("clear") + t.EnterCA = tc.getstr("smcup") + t.ExitCA = tc.getstr("rmcup") + t.ShowCursor = tc.getstr("cnorm") + t.HideCursor = tc.getstr("civis") + t.AttrOff = tc.getstr("sgr0") + t.Underline = tc.getstr("smul") + t.Bold = tc.getstr("bold") + t.Italic = tc.getstr("sitm") + if len(t.Italic) == 0 { + t.Italic = "\x1b[3m" + } + t.Strikethrough = "\x1b[9m" + t.Blink = tc.getstr("blink") + t.Dim = tc.getstr("dim") + t.Reverse = tc.getstr("rev") + t.EnterKeypad = tc.getstr("smkx") + t.ExitKeypad = tc.getstr("rmkx") + t.SetFg = tc.getstr("setaf") + t.SetBg = tc.getstr("setab") + t.SetCursor = tc.getstr("cup") + t.CursorBack1 = tc.getstr("cub1") + t.CursorUp1 = tc.getstr("cuu1") + t.KeyF1 = tc.getstr("kf1") + t.KeyF2 = tc.getstr("kf2") + t.KeyF3 = tc.getstr("kf3") + t.KeyF4 = tc.getstr("kf4") + t.KeyF5 = tc.getstr("kf5") + t.KeyF6 = tc.getstr("kf6") + t.KeyF7 = tc.getstr("kf7") + t.KeyF8 = tc.getstr("kf8") + t.KeyF9 = tc.getstr("kf9") + t.KeyF10 = tc.getstr("kf10") + t.KeyF11 = tc.getstr("kf11") + t.KeyF12 = tc.getstr("kf12") + t.KeyF13 = tc.getstr("kf13") + t.KeyF14 = tc.getstr("kf14") + t.KeyF15 = tc.getstr("kf15") + t.KeyF16 = tc.getstr("kf16") + t.KeyF17 = tc.getstr("kf17") + t.KeyF18 = tc.getstr("kf18") + t.KeyF19 = tc.getstr("kf19") + t.KeyF20 = tc.getstr("kf20") + t.KeyF21 = tc.getstr("kf21") + t.KeyF22 = tc.getstr("kf22") + t.KeyF23 = tc.getstr("kf23") + t.KeyF24 = tc.getstr("kf24") + t.KeyF25 = tc.getstr("kf25") + t.KeyF26 = tc.getstr("kf26") + t.KeyF27 = tc.getstr("kf27") + t.KeyF28 = tc.getstr("kf28") + t.KeyF29 = tc.getstr("kf29") + t.KeyF30 = tc.getstr("kf30") + t.KeyF31 = tc.getstr("kf31") + t.KeyF32 = tc.getstr("kf32") + t.KeyF33 = tc.getstr("kf33") + t.KeyF34 = tc.getstr("kf34") + t.KeyF35 = tc.getstr("kf35") + t.KeyF36 = tc.getstr("kf36") + t.KeyF37 = tc.getstr("kf37") + t.KeyF38 = tc.getstr("kf38") + t.KeyF39 = tc.getstr("kf39") + t.KeyF40 = tc.getstr("kf40") + t.KeyF41 = tc.getstr("kf41") + t.KeyF42 = tc.getstr("kf42") + t.KeyF43 = tc.getstr("kf43") + t.KeyF44 = tc.getstr("kf44") + t.KeyF45 = tc.getstr("kf45") + t.KeyF46 = tc.getstr("kf46") + t.KeyF47 = tc.getstr("kf47") + t.KeyF48 = tc.getstr("kf48") + t.KeyF49 = tc.getstr("kf49") + t.KeyF50 = tc.getstr("kf50") + t.KeyF51 = tc.getstr("kf51") + t.KeyF52 = tc.getstr("kf52") + t.KeyF53 = tc.getstr("kf53") + t.KeyF54 = tc.getstr("kf54") + t.KeyF55 = tc.getstr("kf55") + t.KeyF56 = tc.getstr("kf56") + t.KeyF57 = tc.getstr("kf57") + t.KeyF58 = tc.getstr("kf58") + t.KeyF59 = tc.getstr("kf59") + t.KeyF60 = tc.getstr("kf60") + t.KeyF61 = tc.getstr("kf61") + t.KeyF62 = tc.getstr("kf62") + t.KeyF63 = tc.getstr("kf63") + t.KeyF64 = tc.getstr("kf64") + t.KeyInsert = tc.getstr("kich1") + t.KeyDelete = tc.getstr("kdch1") + t.KeyBackspace = tc.getstr("kbs") + t.KeyHome = tc.getstr("khome") + t.KeyEnd = tc.getstr("kend") + t.KeyUp = tc.getstr("kcuu1") + t.KeyDown = tc.getstr("kcud1") + t.KeyRight = tc.getstr("kcuf1") + t.KeyLeft = tc.getstr("kcub1") + t.KeyPgDn = tc.getstr("knp") + t.KeyPgUp = tc.getstr("kpp") + t.KeyBacktab = tc.getstr("kcbt") + t.KeyExit = tc.getstr("kext") + t.KeyCancel = tc.getstr("kcan") + t.KeyPrint = tc.getstr("kprt") + t.KeyHelp = tc.getstr("khlp") + t.KeyClear = tc.getstr("kclr") + t.AltChars = tc.getstr("acsc") + t.EnterAcs = tc.getstr("smacs") + t.ExitAcs = tc.getstr("rmacs") + t.EnableAcs = tc.getstr("enacs") + t.Mouse = tc.getstr("kmous") + t.KeyShfRight = tc.getstr("kRIT") + t.KeyShfLeft = tc.getstr("kLFT") + t.KeyShfHome = tc.getstr("kHOM") + t.KeyShfEnd = tc.getstr("kEND") + + // Terminfo lacks descriptions for a bunch of modified keys, + // but modern XTerm and emulators often have them. Let's add them, + // if the shifted right and left arrows are defined. + if t.KeyShfRight == "\x1b[1;2C" && t.KeyShfLeft == "\x1b[1;2D" { + t.KeyShfUp = "\x1b[1;2A" + t.KeyShfDown = "\x1b[1;2B" + t.KeyMetaUp = "\x1b[1;9A" + t.KeyMetaDown = "\x1b[1;9B" + t.KeyMetaRight = "\x1b[1;9C" + t.KeyMetaLeft = "\x1b[1;9D" + t.KeyAltUp = "\x1b[1;3A" + t.KeyAltDown = "\x1b[1;3B" + t.KeyAltRight = "\x1b[1;3C" + t.KeyAltLeft = "\x1b[1;3D" + t.KeyCtrlUp = "\x1b[1;5A" + t.KeyCtrlDown = "\x1b[1;5B" + t.KeyCtrlRight = "\x1b[1;5C" + t.KeyCtrlLeft = "\x1b[1;5D" + t.KeyAltShfUp = "\x1b[1;4A" + t.KeyAltShfDown = "\x1b[1;4B" + t.KeyAltShfRight = "\x1b[1;4C" + t.KeyAltShfLeft = "\x1b[1;4D" + + t.KeyMetaShfUp = "\x1b[1;10A" + t.KeyMetaShfDown = "\x1b[1;10B" + t.KeyMetaShfRight = "\x1b[1;10C" + t.KeyMetaShfLeft = "\x1b[1;10D" + + t.KeyCtrlShfUp = "\x1b[1;6A" + t.KeyCtrlShfDown = "\x1b[1;6B" + t.KeyCtrlShfRight = "\x1b[1;6C" + t.KeyCtrlShfLeft = "\x1b[1;6D" + } + // And also for Home and End + if t.KeyShfHome == "\x1b[1;2H" && t.KeyShfEnd == "\x1b[1;2F" { + t.KeyCtrlHome = "\x1b[1;5H" + t.KeyCtrlEnd = "\x1b[1;5F" + t.KeyAltHome = "\x1b[1;9H" + t.KeyAltEnd = "\x1b[1;9F" + t.KeyCtrlShfHome = "\x1b[1;6H" + t.KeyCtrlShfEnd = "\x1b[1;6F" + t.KeyAltShfHome = "\x1b[1;4H" + t.KeyAltShfEnd = "\x1b[1;4F" + t.KeyMetaShfHome = "\x1b[1;10H" + t.KeyMetaShfEnd = "\x1b[1;10F" + } + + // And the same thing for rxvt and workalikes (Eterm, aterm, etc.) + // It seems that urxvt at least send ESC as ALT prefix for these, + // although some places seem to indicate a separate ALT key sesquence. + if t.KeyShfRight == "\x1b[c" && t.KeyShfLeft == "\x1b[d" { + t.KeyShfUp = "\x1b[a" + t.KeyShfDown = "\x1b[b" + t.KeyCtrlUp = "\x1b[Oa" + t.KeyCtrlDown = "\x1b[Ob" + t.KeyCtrlRight = "\x1b[Oc" + t.KeyCtrlLeft = "\x1b[Od" + } + if t.KeyShfHome == "\x1b[7$" && t.KeyShfEnd == "\x1b[8$" { + t.KeyCtrlHome = "\x1b[7^" + t.KeyCtrlEnd = "\x1b[8^" + } + + // If the kmous entry is present, then we need to record the + // the codes to enter and exit mouse mode. Sadly, this is not + // part of the terminfo databases anywhere that I've found, but + // is an extension. The escape codes are documented in the XTerm + // manual, and all terminals that have kmous are expected to + // use these same codes, unless explicitly configured otherwise + // vi XM. Note that in any event, we only known how to parse either + // x11 or SGR mouse events -- if your terminal doesn't support one + // of these two forms, you maybe out of luck. + t.MouseMode = tc.getstr("XM") + if t.Mouse != "" && t.MouseMode == "" { + // we anticipate that all xterm mouse tracking compatible + // terminals understand mouse tracking (1000), but we hope + // that those that don't understand any-event tracking (1003) + // will at least ignore it. Likewise we hope that terminals + // that don't understand SGR reporting (1006) just ignore it. + t.MouseMode = "%?%p1%{1}%=%t%'h'%Pa%e%'l'%Pa%;" + + "\x1b[?1000%ga%c\x1b[?1002%ga%c\x1b[?1003%ga%c\x1b[?1006%ga%c" + } + + // We only support colors in ANSI 8 or 256 color mode. + if t.Colors < 8 || t.SetFg == "" { + t.Colors = 0 + } + if t.SetCursor == "" { + return nil, "", notaddressable + } + + // For padding, we lookup the pad char. If that isn't present, + // and npc is *not* set, then we assume a null byte. + t.PadChar = tc.getstr("pad") + if t.PadChar == "" { + if !tc.getflag("npc") { + t.PadChar = "\u0000" + } + } + + // For some terminals we fabricate a -truecolor entry, that may + // not exist in terminfo. + if addTrueColor { + t.SetFgRGB = "\x1b[38;2;%p1%d;%p2%d;%p3%dm" + t.SetBgRGB = "\x1b[48;2;%p1%d;%p2%d;%p3%dm" + t.SetFgBgRGB = "\x1b[38;2;%p1%d;%p2%d;%p3%d;" + + "48;2;%p4%d;%p5%d;%p6%dm" + } + + // For terminals that use "standard" SGR sequences, lets combine the + // foreground and background together. + if strings.HasPrefix(t.SetFg, "\x1b[") && + strings.HasPrefix(t.SetBg, "\x1b[") && + strings.HasSuffix(t.SetFg, "m") && + strings.HasSuffix(t.SetBg, "m") { + fg := t.SetFg[:len(t.SetFg)-1] + r := regexp.MustCompile("%p1") + bg := r.ReplaceAllString(t.SetBg[2:], "%p2") + t.SetFgBg = fg + ";" + bg + } + + return t, tc.desc, nil +} + +func GetDynamic() (term *Terminfo, err error) { + term, _, err = getinfo(os.Getenv("TERM")) + return +} |