842 lines
24 KiB
Go
842 lines
24 KiB
Go
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// Copyright 2017 The TCell Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use file except in compliance with the License.
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// You may obtain a copy of the license at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package terminfo
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import (
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"bytes"
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"compress/gzip"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"os"
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"path"
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"strconv"
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"strings"
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"sync"
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)
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var (
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// ErrTermNotFound indicates that a suitable terminal entry could
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// not be found. This can result from either not having TERM set,
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// or from the TERM failing to support certain minimal functionality,
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// in particular absolute cursor addressability (the cup capability)
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// is required. For example, legacy "adm3" lacks this capability,
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// whereas the slightly newer "adm3a" supports it. This failure
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// occurs most often with "dumb".
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ErrTermNotFound = errors.New("terminal entry not found")
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)
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// Terminfo represents a terminfo entry. Note that we use friendly names
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// in Go, but when we write out JSON, we use the same names as terminfo.
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// The name, aliases and smous, rmous fields do not come from terminfo directly.
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type Terminfo struct {
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Name string `json:"name"`
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Aliases []string `json:"aliases,omitempty"`
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Columns int `json:"cols,omitempty"` // cols
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Lines int `json:"lines,omitempty"` // lines
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Colors int `json:"colors,omitempty"` // colors
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Bell string `json:"bell,omitempty"` // bell
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Clear string `json:"clear,omitempty"` // clear
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EnterCA string `json:"smcup,omitempty"` // smcup
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ExitCA string `json:"rmcup,omitempty"` // rmcup
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ShowCursor string `json:"cnorm,omitempty"` // cnorm
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HideCursor string `json:"civis,omitempty"` // civis
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AttrOff string `json:"sgr0,omitempty"` // sgr0
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Underline string `json:"smul,omitempty"` // smul
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Bold string `json:"bold,omitempty"` // bold
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Italic string `json:"sitm,omitempty"` // sitm
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Strikethrough string `json:"strikethrough,omitempty"` // strikethrough
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Blink string `json:"blink,omitempty"` // blink
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Reverse string `json:"rev,omitempty"` // rev
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Dim string `json:"dim,omitempty"` // dim
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EnterKeypad string `json:"smkx,omitempty"` // smkx
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ExitKeypad string `json:"rmkx,omitempty"` // rmkx
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SetFg string `json:"setaf,omitempty"` // setaf
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SetBg string `json:"setbg,omitempty"` // setab
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SetCursor string `json:"cup,omitempty"` // cup
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CursorBack1 string `json:"cub1,omitempty"` // cub1
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CursorUp1 string `json:"cuu1,omitempty"` // cuu1
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PadChar string `json:"pad,omitempty"` // pad
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KeyBackspace string `json:"kbs,omitempty"` // kbs
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KeyF1 string `json:"kf1,omitempty"` // kf1
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KeyF2 string `json:"kf2,omitempty"` // kf2
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KeyF3 string `json:"kf3,omitempty"` // kf3
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KeyF4 string `json:"kf4,omitempty"` // kf4
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KeyF5 string `json:"kf5,omitempty"` // kf5
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KeyF6 string `json:"kf6,omitempty"` // kf6
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KeyF7 string `json:"kf7,omitempty"` // kf7
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KeyF8 string `json:"kf8,omitempty"` // kf8
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KeyF9 string `json:"kf9,omitempty"` // kf9
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KeyF10 string `json:"kf10,omitempty"` // kf10
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KeyF11 string `json:"kf11,omitempty"` // kf11
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KeyF12 string `json:"kf12,omitempty"` // kf12
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KeyF13 string `json:"kf13,omitempty"` // kf13
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KeyF14 string `json:"kf14,omitempty"` // kf14
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KeyF15 string `json:"kf15,omitempty"` // kf15
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KeyF16 string `json:"kf16,omitempty"` // kf16
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KeyF17 string `json:"kf17,omitempty"` // kf17
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KeyF18 string `json:"kf18,omitempty"` // kf18
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KeyF19 string `json:"kf19,omitempty"` // kf19
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KeyF20 string `json:"kf20,omitempty"` // kf20
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KeyF21 string `json:"kf21,omitempty"` // kf21
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KeyF22 string `json:"kf22,omitempty"` // kf22
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KeyF23 string `json:"kf23,omitempty"` // kf23
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KeyF24 string `json:"kf24,omitempty"` // kf24
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KeyF25 string `json:"kf25,omitempty"` // kf25
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KeyF26 string `json:"kf26,omitempty"` // kf26
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KeyF27 string `json:"kf27,omitempty"` // kf27
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KeyF28 string `json:"kf28,omitempty"` // kf28
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KeyF29 string `json:"kf29,omitempty"` // kf29
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KeyF30 string `json:"kf30,omitempty"` // kf30
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KeyF31 string `json:"kf31,omitempty"` // kf31
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KeyF32 string `json:"kf32,omitempty"` // kf32
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KeyF33 string `json:"kf33,omitempty"` // kf33
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KeyF34 string `json:"kf34,omitempty"` // kf34
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KeyF35 string `json:"kf35,omitempty"` // kf35
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KeyF36 string `json:"kf36,omitempty"` // kf36
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KeyF37 string `json:"kf37,omitempty"` // kf37
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KeyF38 string `json:"kf38,omitempty"` // kf38
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KeyF39 string `json:"kf39,omitempty"` // kf39
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KeyF40 string `json:"kf40,omitempty"` // kf40
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KeyF41 string `json:"kf41,omitempty"` // kf41
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KeyF42 string `json:"kf42,omitempty"` // kf42
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KeyF43 string `json:"kf43,omitempty"` // kf43
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KeyF44 string `json:"kf44,omitempty"` // kf44
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KeyF45 string `json:"kf45,omitempty"` // kf45
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KeyF46 string `json:"kf46,omitempty"` // kf46
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KeyF47 string `json:"kf47,omitempty"` // kf47
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KeyF48 string `json:"kf48,omitempty"` // kf48
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KeyF49 string `json:"kf49,omitempty"` // kf49
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KeyF50 string `json:"kf50,omitempty"` // kf50
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KeyF51 string `json:"kf51,omitempty"` // kf51
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KeyF52 string `json:"kf52,omitempty"` // kf52
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KeyF53 string `json:"kf53,omitempty"` // kf53
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KeyF54 string `json:"kf54,omitempty"` // kf54
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KeyF55 string `json:"kf55,omitempty"` // kf55
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KeyF56 string `json:"kf56,omitempty"` // kf56
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KeyF57 string `json:"kf57,omitempty"` // kf57
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KeyF58 string `json:"kf58,omitempty"` // kf58
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KeyF59 string `json:"kf59,omitempty"` // kf59
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KeyF60 string `json:"kf60,omitempty"` // kf60
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KeyF61 string `json:"kf61,omitempty"` // kf61
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KeyF62 string `json:"kf62,omitempty"` // kf62
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KeyF63 string `json:"kf63,omitempty"` // kf63
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KeyF64 string `json:"kf64,omitempty"` // kf64
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KeyInsert string `json:"kich,omitempty"` // kich1
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KeyDelete string `json:"kdch,omitempty"` // kdch1
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KeyHome string `json:"khome,omitempty"` // khome
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KeyEnd string `json:"kend,omitempty"` // kend
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KeyHelp string `json:"khlp,omitempty"` // khlp
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KeyPgUp string `json:"kpp,omitempty"` // kpp
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KeyPgDn string `json:"knp,omitempty"` // knp
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KeyUp string `json:"kcuu1,omitempty"` // kcuu1
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KeyDown string `json:"kcud1,omitempty"` // kcud1
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KeyLeft string `json:"kcub1,omitempty"` // kcub1
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KeyRight string `json:"kcuf1,omitempty"` // kcuf1
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KeyBacktab string `json:"kcbt,omitempty"` // kcbt
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KeyExit string `json:"kext,omitempty"` // kext
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KeyClear string `json:"kclr,omitempty"` // kclr
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KeyPrint string `json:"kprt,omitempty"` // kprt
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KeyCancel string `json:"kcan,omitempty"` // kcan
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Mouse string `json:"kmous,omitempty"` // kmous
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MouseMode string `json:"XM,omitempty"` // XM
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AltChars string `json:"acsc,omitempty"` // acsc
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EnterAcs string `json:"smacs,omitempty"` // smacs
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ExitAcs string `json:"rmacs,omitempty"` // rmacs
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EnableAcs string `json:"enacs,omitempty"` // enacs
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KeyShfRight string `json:"kRIT,omitempty"` // kRIT
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KeyShfLeft string `json:"kLFT,omitempty"` // kLFT
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KeyShfHome string `json:"kHOM,omitempty"` // kHOM
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KeyShfEnd string `json:"kEND,omitempty"` // kEND
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// These are non-standard extensions to terminfo. This includes
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// true color support, and some additional keys. Its kind of bizarre
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// that shifted variants of left and right exist, but not up and down.
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// Terminal support for these are going to vary amongst XTerm
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// emulations, so don't depend too much on them in your application.
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SetFgBg string `json:"_setfgbg,omitempty"` // setfgbg
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SetFgBgRGB string `json:"_setfgbgrgb,omitempty"` // setfgbgrgb
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SetFgRGB string `json:"_setfrgb,omitempty"` // setfrgb
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SetBgRGB string `json:"_setbrgb,omitempty"` // setbrgb
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KeyShfUp string `json:"_kscu1,omitempty"` // shift-up
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KeyShfDown string `json:"_kscud1,omitempty"` // shift-down
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KeyCtrlUp string `json:"_kccu1,omitempty"` // ctrl-up
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KeyCtrlDown string `json:"_kccud1,omitempty"` // ctrl-left
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KeyCtrlRight string `json:"_kccuf1,omitempty"` // ctrl-right
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KeyCtrlLeft string `json:"_kccub1,omitempty"` // ctrl-left
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KeyMetaUp string `json:"_kmcu1,omitempty"` // meta-up
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KeyMetaDown string `json:"_kmcud1,omitempty"` // meta-left
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KeyMetaRight string `json:"_kmcuf1,omitempty"` // meta-right
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KeyMetaLeft string `json:"_kmcub1,omitempty"` // meta-left
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KeyAltUp string `json:"_kacu1,omitempty"` // alt-up
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KeyAltDown string `json:"_kacud1,omitempty"` // alt-left
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KeyAltRight string `json:"_kacuf1,omitempty"` // alt-right
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KeyAltLeft string `json:"_kacub1,omitempty"` // alt-left
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KeyCtrlHome string `json:"_kchome,omitempty"`
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KeyCtrlEnd string `json:"_kcend,omitempty"`
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KeyMetaHome string `json:"_kmhome,omitempty"`
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KeyMetaEnd string `json:"_kmend,omitempty"`
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KeyAltHome string `json:"_kahome,omitempty"`
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KeyAltEnd string `json:"_kaend,omitempty"`
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KeyAltShfUp string `json:"_kascu1,omitempty"`
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KeyAltShfDown string `json:"_kascud1,omitempty"`
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KeyAltShfLeft string `json:"_kascub1,omitempty"`
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KeyAltShfRight string `json:"_kascuf1,omitempty"`
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KeyMetaShfUp string `json:"_kmscu1,omitempty"`
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KeyMetaShfDown string `json:"_kmscud1,omitempty"`
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KeyMetaShfLeft string `json:"_kmscub1,omitempty"`
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KeyMetaShfRight string `json:"_kmscuf1,omitempty"`
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KeyCtrlShfUp string `json:"_kcscu1,omitempty"`
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KeyCtrlShfDown string `json:"_kcscud1,omitempty"`
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KeyCtrlShfLeft string `json:"_kcscub1,omitempty"`
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KeyCtrlShfRight string `json:"_kcscuf1,omitempty"`
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KeyCtrlShfHome string `json:"_kcHOME,omitempty"`
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KeyCtrlShfEnd string `json:"_kcEND,omitempty"`
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KeyAltShfHome string `json:"_kaHOME,omitempty"`
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KeyAltShfEnd string `json:"_kaEND,omitempty"`
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KeyMetaShfHome string `json:"_kmHOME,omitempty"`
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KeyMetaShfEnd string `json:"_kmEND,omitempty"`
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KeyCtrlPgUp string
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KeyCtrlPgDn string
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}
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type stackElem struct {
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s string
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i int
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isStr bool
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isInt bool
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}
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type stack []stackElem
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func (st stack) Push(v string) stack {
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e := stackElem{
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s: v,
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isStr: true,
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}
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return append(st, e)
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}
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func (st stack) Pop() (string, stack) {
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v := ""
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if len(st) > 0 {
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e := st[len(st)-1]
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st = st[:len(st)-1]
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if e.isStr {
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v = e.s
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} else {
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v = strconv.Itoa(e.i)
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}
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}
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return v, st
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}
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func (st stack) PopInt() (int, stack) {
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if len(st) > 0 {
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e := st[len(st)-1]
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st = st[:len(st)-1]
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if e.isInt {
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return e.i, st
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} else if e.isStr {
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i, _ := strconv.Atoi(e.s)
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return i, st
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}
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}
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return 0, st
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}
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func (st stack) PopBool() (bool, stack) {
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if len(st) > 0 {
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e := st[len(st)-1]
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st = st[:len(st)-1]
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if e.isStr {
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if e.s == "1" {
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return true, st
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}
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return false, st
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} else if e.i == 1 {
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return true, st
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} else {
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return false, st
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}
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}
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return false, st
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}
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func (st stack) PushInt(i int) stack {
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e := stackElem{
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i: i,
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isInt: true,
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}
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return append(st, e)
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}
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func (st stack) PushBool(i bool) stack {
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if i {
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return st.PushInt(1)
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}
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return st.PushInt(0)
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}
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func nextch(s string, index int) (byte, int) {
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if index < len(s) {
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return s[index], index + 1
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}
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return 0, index
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}
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// static vars
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var svars [26]string
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// paramsBuffer handles some persistent state for TParam. Technically we
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// could probably dispense with this, but caching buffer arrays gives us
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// a nice little performance boost. Furthermore, we know that TParam is
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// rarely (never?) called re-entrantly, so we can just reuse the same
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// buffers, making it thread-safe by stashing a lock.
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type paramsBuffer struct {
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out bytes.Buffer
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buf bytes.Buffer
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lk sync.Mutex
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}
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// Start initializes the params buffer with the initial string data.
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// It also locks the paramsBuffer. The caller must call End() when
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// finished.
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func (pb *paramsBuffer) Start(s string) {
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pb.lk.Lock()
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pb.out.Reset()
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pb.buf.Reset()
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pb.buf.WriteString(s)
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}
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// End returns the final output from TParam, but it also releases the lock.
|
||
|
|
func (pb *paramsBuffer) End() string {
|
||
|
|
s := pb.out.String()
|
||
|
|
pb.lk.Unlock()
|
||
|
|
return s
|
||
|
|
}
|
||
|
|
|
||
|
|
// NextCh returns the next input character to the expander.
|
||
|
|
func (pb *paramsBuffer) NextCh() (byte, error) {
|
||
|
|
return pb.buf.ReadByte()
|
||
|
|
}
|
||
|
|
|
||
|
|
// PutCh "emits" (rather schedules for output) a single byte character.
|
||
|
|
func (pb *paramsBuffer) PutCh(ch byte) {
|
||
|
|
pb.out.WriteByte(ch)
|
||
|
|
}
|
||
|
|
|
||
|
|
// PutString schedules a string for output.
|
||
|
|
func (pb *paramsBuffer) PutString(s string) {
|
||
|
|
pb.out.WriteString(s)
|
||
|
|
}
|
||
|
|
|
||
|
|
var pb = ¶msBuffer{}
|
||
|
|
|
||
|
|
// TParm takes a terminfo parameterized string, such as setaf or cup, and
|
||
|
|
// evaluates the string, and returns the result with the parameter
|
||
|
|
// applied.
|
||
|
|
func (t *Terminfo) TParm(s string, p ...int) string {
|
||
|
|
var stk stack
|
||
|
|
var a, b string
|
||
|
|
var ai, bi int
|
||
|
|
var ab bool
|
||
|
|
var dvars [26]string
|
||
|
|
var params [9]int
|
||
|
|
|
||
|
|
pb.Start(s)
|
||
|
|
|
||
|
|
// make sure we always have 9 parameters -- makes it easier
|
||
|
|
// later to skip checks
|
||
|
|
for i := 0; i < len(params) && i < len(p); i++ {
|
||
|
|
params[i] = p[i]
|
||
|
|
}
|
||
|
|
|
||
|
|
nest := 0
|
||
|
|
|
||
|
|
for {
|
||
|
|
|
||
|
|
ch, err := pb.NextCh()
|
||
|
|
if err != nil {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
|
||
|
|
if ch != '%' {
|
||
|
|
pb.PutCh(ch)
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
|
||
|
|
ch, err = pb.NextCh()
|
||
|
|
if err != nil {
|
||
|
|
// XXX Error
|
||
|
|
break
|
||
|
|
}
|
||
|
|
|
||
|
|
switch ch {
|
||
|
|
case '%': // quoted %
|
||
|
|
pb.PutCh(ch)
|
||
|
|
|
||
|
|
case 'i': // increment both parameters (ANSI cup support)
|
||
|
|
params[0]++
|
||
|
|
params[1]++
|
||
|
|
|
||
|
|
case 'c', 's':
|
||
|
|
// NB: these, and 'd' below are special cased for
|
||
|
|
// efficiency. They could be handled by the richer
|
||
|
|
// format support below, less efficiently.
|
||
|
|
a, stk = stk.Pop()
|
||
|
|
pb.PutString(a)
|
||
|
|
|
||
|
|
case 'd':
|
||
|
|
ai, stk = stk.PopInt()
|
||
|
|
pb.PutString(strconv.Itoa(ai))
|
||
|
|
|
||
|
|
case '0', '1', '2', '3', '4', 'x', 'X', 'o', ':':
|
||
|
|
// This is pretty suboptimal, but this is rarely used.
|
||
|
|
// None of the mainstream terminals use any of this,
|
||
|
|
// and it would surprise me if this code is ever
|
||
|
|
// executed outside of test cases.
|
||
|
|
f := "%"
|
||
|
|
if ch == ':' {
|
||
|
|
ch, _ = pb.NextCh()
|
||
|
|
}
|
||
|
|
f += string(ch)
|
||
|
|
for ch == '+' || ch == '-' || ch == '#' || ch == ' ' {
|
||
|
|
ch, _ = pb.NextCh()
|
||
|
|
f += string(ch)
|
||
|
|
}
|
||
|
|
for (ch >= '0' && ch <= '9') || ch == '.' {
|
||
|
|
ch, _ = pb.NextCh()
|
||
|
|
f += string(ch)
|
||
|
|
}
|
||
|
|
switch ch {
|
||
|
|
case 'd', 'x', 'X', 'o':
|
||
|
|
ai, stk = stk.PopInt()
|
||
|
|
pb.PutString(fmt.Sprintf(f, ai))
|
||
|
|
case 'c', 's':
|
||
|
|
a, stk = stk.Pop()
|
||
|
|
pb.PutString(fmt.Sprintf(f, a))
|
||
|
|
}
|
||
|
|
|
||
|
|
case 'p': // push parameter
|
||
|
|
ch, _ = pb.NextCh()
|
||
|
|
ai = int(ch - '1')
|
||
|
|
if ai >= 0 && ai < len(params) {
|
||
|
|
stk = stk.PushInt(params[ai])
|
||
|
|
} else {
|
||
|
|
stk = stk.PushInt(0)
|
||
|
|
}
|
||
|
|
|
||
|
|
case 'P': // pop & store variable
|
||
|
|
ch, _ = pb.NextCh()
|
||
|
|
if ch >= 'A' && ch <= 'Z' {
|
||
|
|
svars[int(ch-'A')], stk = stk.Pop()
|
||
|
|
} else if ch >= 'a' && ch <= 'z' {
|
||
|
|
dvars[int(ch-'a')], stk = stk.Pop()
|
||
|
|
}
|
||
|
|
|
||
|
|
case 'g': // recall & push variable
|
||
|
|
ch, _ = pb.NextCh()
|
||
|
|
if ch >= 'A' && ch <= 'Z' {
|
||
|
|
stk = stk.Push(svars[int(ch-'A')])
|
||
|
|
} else if ch >= 'a' && ch <= 'z' {
|
||
|
|
stk = stk.Push(dvars[int(ch-'a')])
|
||
|
|
}
|
||
|
|
|
||
|
|
case '\'': // push(char)
|
||
|
|
ch, _ = pb.NextCh()
|
||
|
|
pb.NextCh() // must be ' but we don't check
|
||
|
|
stk = stk.Push(string(ch))
|
||
|
|
|
||
|
|
case '{': // push(int)
|
||
|
|
ai = 0
|
||
|
|
ch, _ = pb.NextCh()
|
||
|
|
for ch >= '0' && ch <= '9' {
|
||
|
|
ai *= 10
|
||
|
|
ai += int(ch - '0')
|
||
|
|
ch, _ = pb.NextCh()
|
||
|
|
}
|
||
|
|
// ch must be '}' but no verification
|
||
|
|
stk = stk.PushInt(ai)
|
||
|
|
|
||
|
|
case 'l': // push(strlen(pop))
|
||
|
|
a, stk = stk.Pop()
|
||
|
|
stk = stk.PushInt(len(a))
|
||
|
|
|
||
|
|
case '+':
|
||
|
|
bi, stk = stk.PopInt()
|
||
|
|
ai, stk = stk.PopInt()
|
||
|
|
stk = stk.PushInt(ai + bi)
|
||
|
|
|
||
|
|
case '-':
|
||
|
|
bi, stk = stk.PopInt()
|
||
|
|
ai, stk = stk.PopInt()
|
||
|
|
stk = stk.PushInt(ai - bi)
|
||
|
|
|
||
|
|
case '*':
|
||
|
|
bi, stk = stk.PopInt()
|
||
|
|
ai, stk = stk.PopInt()
|
||
|
|
stk = stk.PushInt(ai * bi)
|
||
|
|
|
||
|
|
case '/':
|
||
|
|
bi, stk = stk.PopInt()
|
||
|
|
ai, stk = stk.PopInt()
|
||
|
|
if bi != 0 {
|
||
|
|
stk = stk.PushInt(ai / bi)
|
||
|
|
} else {
|
||
|
|
stk = stk.PushInt(0)
|
||
|
|
}
|
||
|
|
|
||
|
|
case 'm': // push(pop mod pop)
|
||
|
|
bi, stk = stk.PopInt()
|
||
|
|
ai, stk = stk.PopInt()
|
||
|
|
if bi != 0 {
|
||
|
|
stk = stk.PushInt(ai % bi)
|
||
|
|
} else {
|
||
|
|
stk = stk.PushInt(0)
|
||
|
|
}
|
||
|
|
|
||
|
|
case '&': // AND
|
||
|
|
bi, stk = stk.PopInt()
|
||
|
|
ai, stk = stk.PopInt()
|
||
|
|
stk = stk.PushInt(ai & bi)
|
||
|
|
|
||
|
|
case '|': // OR
|
||
|
|
bi, stk = stk.PopInt()
|
||
|
|
ai, stk = stk.PopInt()
|
||
|
|
stk = stk.PushInt(ai | bi)
|
||
|
|
|
||
|
|
case '^': // XOR
|
||
|
|
bi, stk = stk.PopInt()
|
||
|
|
ai, stk = stk.PopInt()
|
||
|
|
stk = stk.PushInt(ai ^ bi)
|
||
|
|
|
||
|
|
case '~': // bit complement
|
||
|
|
ai, stk = stk.PopInt()
|
||
|
|
stk = stk.PushInt(ai ^ -1)
|
||
|
|
|
||
|
|
case '!': // logical NOT
|
||
|
|
ai, stk = stk.PopInt()
|
||
|
|
stk = stk.PushBool(ai != 0)
|
||
|
|
|
||
|
|
case '=': // numeric compare or string compare
|
||
|
|
b, stk = stk.Pop()
|
||
|
|
a, stk = stk.Pop()
|
||
|
|
stk = stk.PushBool(a == b)
|
||
|
|
|
||
|
|
case '>': // greater than, numeric
|
||
|
|
bi, stk = stk.PopInt()
|
||
|
|
ai, stk = stk.PopInt()
|
||
|
|
stk = stk.PushBool(ai > bi)
|
||
|
|
|
||
|
|
case '<': // less than, numeric
|
||
|
|
bi, stk = stk.PopInt()
|
||
|
|
ai, stk = stk.PopInt()
|
||
|
|
stk = stk.PushBool(ai < bi)
|
||
|
|
|
||
|
|
case '?': // start conditional
|
||
|
|
|
||
|
|
case 't':
|
||
|
|
ab, stk = stk.PopBool()
|
||
|
|
if ab {
|
||
|
|
// just keep going
|
||
|
|
break
|
||
|
|
}
|
||
|
|
nest = 0
|
||
|
|
ifloop:
|
||
|
|
// this loop consumes everything until we hit our else,
|
||
|
|
// or the end of the conditional
|
||
|
|
for {
|
||
|
|
ch, err = pb.NextCh()
|
||
|
|
if err != nil {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
if ch != '%' {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
ch, _ = pb.NextCh()
|
||
|
|
switch ch {
|
||
|
|
case ';':
|
||
|
|
if nest == 0 {
|
||
|
|
break ifloop
|
||
|
|
}
|
||
|
|
nest--
|
||
|
|
case '?':
|
||
|
|
nest++
|
||
|
|
case 'e':
|
||
|
|
if nest == 0 {
|
||
|
|
break ifloop
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
case 'e':
|
||
|
|
// if we got here, it means we didn't use the else
|
||
|
|
// in the 't' case above, and we should skip until
|
||
|
|
// the end of the conditional
|
||
|
|
nest = 0
|
||
|
|
elloop:
|
||
|
|
for {
|
||
|
|
ch, err = pb.NextCh()
|
||
|
|
if err != nil {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
if ch != '%' {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
ch, _ = pb.NextCh()
|
||
|
|
switch ch {
|
||
|
|
case ';':
|
||
|
|
if nest == 0 {
|
||
|
|
break elloop
|
||
|
|
}
|
||
|
|
nest--
|
||
|
|
case '?':
|
||
|
|
nest++
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
case ';': // endif
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return pb.End()
|
||
|
|
}
|
||
|
|
|
||
|
|
// TPuts emits the string to the writer, but expands inline padding
|
||
|
|
// indications (of the form $<[delay]> where [delay] is msec) to
|
||
|
|
// a suitable number of padding characters (usually null bytes) based
|
||
|
|
// upon the supplied baud. At high baud rates, more padding characters
|
||
|
|
// will be inserted. All Terminfo based strings should be emitted using
|
||
|
|
// this function.
|
||
|
|
func (t *Terminfo) TPuts(w io.Writer, s string, baud int) {
|
||
|
|
for {
|
||
|
|
beg := strings.Index(s, "$<")
|
||
|
|
if beg < 0 {
|
||
|
|
// Most strings don't need padding, which is good news!
|
||
|
|
io.WriteString(w, s)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
io.WriteString(w, s[:beg])
|
||
|
|
s = s[beg+2:]
|
||
|
|
end := strings.Index(s, ">")
|
||
|
|
if end < 0 {
|
||
|
|
// unterminated.. just emit bytes unadulterated
|
||
|
|
io.WriteString(w, "$<"+s)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
val := s[:end]
|
||
|
|
s = s[end+1:]
|
||
|
|
padus := 0
|
||
|
|
unit := 1000
|
||
|
|
dot := false
|
||
|
|
loop:
|
||
|
|
for i := range val {
|
||
|
|
switch val[i] {
|
||
|
|
case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
|
||
|
|
padus *= 10
|
||
|
|
padus += int(val[i] - '0')
|
||
|
|
if dot {
|
||
|
|
unit *= 10
|
||
|
|
}
|
||
|
|
case '.':
|
||
|
|
if !dot {
|
||
|
|
dot = true
|
||
|
|
} else {
|
||
|
|
break loop
|
||
|
|
}
|
||
|
|
default:
|
||
|
|
break loop
|
||
|
|
}
|
||
|
|
}
|
||
|
|
cnt := int(((baud / 8) * padus) / unit)
|
||
|
|
for cnt > 0 {
|
||
|
|
io.WriteString(w, t.PadChar)
|
||
|
|
cnt--
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// TGoto returns a string suitable for addressing the cursor at the given
|
||
|
|
// row and column. The origin 0, 0 is in the upper left corner of the screen.
|
||
|
|
func (t *Terminfo) TGoto(col, row int) string {
|
||
|
|
return t.TParm(t.SetCursor, row, col)
|
||
|
|
}
|
||
|
|
|
||
|
|
// TColor returns a string corresponding to the given foreground and background
|
||
|
|
// colors. Either fg or bg can be set to -1 to elide.
|
||
|
|
func (t *Terminfo) TColor(fi, bi int) string {
|
||
|
|
rv := ""
|
||
|
|
// As a special case, we map bright colors to lower versions if the
|
||
|
|
// color table only holds 8. For the remaining 240 colors, the user
|
||
|
|
// is out of luck. Someday we could create a mapping table, but its
|
||
|
|
// not worth it.
|
||
|
|
if t.Colors == 8 {
|
||
|
|
if fi > 7 && fi < 16 {
|
||
|
|
fi -= 8
|
||
|
|
}
|
||
|
|
if bi > 7 && bi < 16 {
|
||
|
|
bi -= 8
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if t.Colors > fi && fi >= 0 {
|
||
|
|
rv += t.TParm(t.SetFg, fi)
|
||
|
|
}
|
||
|
|
if t.Colors > bi && bi >= 0 {
|
||
|
|
rv += t.TParm(t.SetBg, bi)
|
||
|
|
}
|
||
|
|
return rv
|
||
|
|
}
|
||
|
|
|
||
|
|
var (
|
||
|
|
dblock sync.Mutex
|
||
|
|
terminfos = make(map[string]*Terminfo)
|
||
|
|
aliases = make(map[string]string)
|
||
|
|
)
|
||
|
|
|
||
|
|
// AddTerminfo can be called to register a new Terminfo entry.
|
||
|
|
func AddTerminfo(t *Terminfo) {
|
||
|
|
dblock.Lock()
|
||
|
|
terminfos[t.Name] = t
|
||
|
|
for _, x := range t.Aliases {
|
||
|
|
terminfos[x] = t
|
||
|
|
}
|
||
|
|
dblock.Unlock()
|
||
|
|
}
|
||
|
|
|
||
|
|
func loadFromFile(fname string, term string) (*Terminfo, error) {
|
||
|
|
var e error
|
||
|
|
var f io.Reader
|
||
|
|
if f, e = os.Open(fname); e != nil {
|
||
|
|
return nil, e
|
||
|
|
}
|
||
|
|
if strings.HasSuffix(fname, ".gz") {
|
||
|
|
if f, e = gzip.NewReader(f); e != nil {
|
||
|
|
return nil, e
|
||
|
|
}
|
||
|
|
}
|
||
|
|
d := json.NewDecoder(f)
|
||
|
|
for {
|
||
|
|
t := &Terminfo{}
|
||
|
|
if e := d.Decode(t); e != nil {
|
||
|
|
if e == io.EOF {
|
||
|
|
return nil, ErrTermNotFound
|
||
|
|
}
|
||
|
|
return nil, e
|
||
|
|
}
|
||
|
|
if t.SetCursor == "" {
|
||
|
|
// This must be an alias record, return it.
|
||
|
|
return t, nil
|
||
|
|
}
|
||
|
|
if t.Name == term {
|
||
|
|
return t, nil
|
||
|
|
}
|
||
|
|
for _, a := range t.Aliases {
|
||
|
|
if a == term {
|
||
|
|
return t, nil
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// LookupTerminfo attempts to find a definition for the named $TERM.
|
||
|
|
// It first looks in the builtin database, which should cover just about
|
||
|
|
// everyone. If it can't find one there, then it will attempt to read
|
||
|
|
// one from the JSON file located in either $TCELLDB, $HOME/.tcelldb
|
||
|
|
// or in this package's source directory as database.json).
|
||
|
|
func LookupTerminfo(name string) (*Terminfo, error) {
|
||
|
|
if name == "" {
|
||
|
|
// else on windows: index out of bounds
|
||
|
|
// on the name[0] reference below
|
||
|
|
return nil, ErrTermNotFound
|
||
|
|
}
|
||
|
|
|
||
|
|
dblock.Lock()
|
||
|
|
t := terminfos[name]
|
||
|
|
dblock.Unlock()
|
||
|
|
|
||
|
|
if t == nil {
|
||
|
|
|
||
|
|
var files []string
|
||
|
|
letter := fmt.Sprintf("%02x", name[0])
|
||
|
|
gzfile := path.Join(letter, name+".gz")
|
||
|
|
jsfile := path.Join(letter, name)
|
||
|
|
|
||
|
|
// Build up the search path. Old versions of tcell used a
|
||
|
|
// single database file, whereas the new ones locate them
|
||
|
|
// in JSON (optionally compressed) files.
|
||
|
|
//
|
||
|
|
// The search path looks like:
|
||
|
|
//
|
||
|
|
// $TCELLDB/x/xterm.gz
|
||
|
|
// $TCELLDB/x/xterm
|
||
|
|
// $TCELLDB
|
||
|
|
// $HOME/.tcelldb/x/xterm.gz
|
||
|
|
// $HOME/.tcelldb/x/xterm
|
||
|
|
// $HOME/.tcelldb
|
||
|
|
// $GOPATH/terminfo/database/x/xterm.gz
|
||
|
|
// $GOPATH/terminfo/database/x/xterm
|
||
|
|
//
|
||
|
|
if pth := os.Getenv("TCELLDB"); pth != "" {
|
||
|
|
files = append(files, path.Join(pth, gzfile))
|
||
|
|
files = append(files, path.Join(pth, jsfile))
|
||
|
|
files = append(files, pth)
|
||
|
|
}
|
||
|
|
if pth := os.Getenv("HOME"); pth != "" {
|
||
|
|
pth = path.Join(pth, ".tcelldb")
|
||
|
|
files = append(files, path.Join(pth, gzfile))
|
||
|
|
files = append(files, path.Join(pth, jsfile))
|
||
|
|
files = append(files, pth)
|
||
|
|
}
|
||
|
|
|
||
|
|
for _, pth := range strings.Split(os.Getenv("GOPATH"), string(os.PathListSeparator)) {
|
||
|
|
pth = path.Join(pth, "src", "github.com", "gdamore", "tcell", "terminfo", "database")
|
||
|
|
files = append(files, path.Join(pth, gzfile))
|
||
|
|
files = append(files, path.Join(pth, jsfile))
|
||
|
|
}
|
||
|
|
|
||
|
|
for _, fname := range files {
|
||
|
|
t, _ = loadFromFile(fname, name)
|
||
|
|
if t != nil {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if t != nil {
|
||
|
|
if t.Name != name {
|
||
|
|
// Check for a database loop (no infinite
|
||
|
|
// recursion).
|
||
|
|
dblock.Lock()
|
||
|
|
if aliases[name] != "" {
|
||
|
|
dblock.Unlock()
|
||
|
|
return nil, ErrTermNotFound
|
||
|
|
}
|
||
|
|
aliases[name] = t.Name
|
||
|
|
dblock.Unlock()
|
||
|
|
return LookupTerminfo(t.Name)
|
||
|
|
}
|
||
|
|
dblock.Lock()
|
||
|
|
terminfos[name] = t
|
||
|
|
dblock.Unlock()
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if t == nil {
|
||
|
|
return nil, ErrTermNotFound
|
||
|
|
}
|
||
|
|
return t, nil
|
||
|
|
}
|