diff options
Diffstat (limited to 'vendor/github.com/awesome-gocui/gocui/escape.go')
| -rw-r--r-- | vendor/github.com/awesome-gocui/gocui/escape.go | 259 |
1 files changed, 0 insertions, 259 deletions
diff --git a/vendor/github.com/awesome-gocui/gocui/escape.go b/vendor/github.com/awesome-gocui/gocui/escape.go deleted file mode 100644 index 64360802..00000000 --- a/vendor/github.com/awesome-gocui/gocui/escape.go +++ /dev/null @@ -1,259 +0,0 @@ -// Copyright 2014 The gocui Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package gocui - -import ( - "strconv" - - "github.com/go-errors/errors" -) - -type escapeInterpreter struct { - state escapeState - curch rune - csiParam []string - curFgColor, curBgColor Attribute - mode OutputMode -} - -type ( - escapeState int - fontEffect int -) - -const ( - stateNone escapeState = iota - stateEscape - stateCSI - stateParams - - bold fontEffect = 1 - underline fontEffect = 4 - reverse fontEffect = 7 - setForegroundColor fontEffect = 38 - setBackgroundColor fontEffect = 48 -) - -var ( - errNotCSI = errors.New("Not a CSI escape sequence") - errCSIParseError = errors.New("CSI escape sequence parsing error") - errCSITooLong = errors.New("CSI escape sequence is too long") -) - -// runes in case of error will output the non-parsed runes as a string. -func (ei *escapeInterpreter) runes() []rune { - switch ei.state { - case stateNone: - return []rune{0x1b} - case stateEscape: - return []rune{0x1b, ei.curch} - case stateCSI: - return []rune{0x1b, '[', ei.curch} - case stateParams: - ret := []rune{0x1b, '['} - for _, s := range ei.csiParam { - ret = append(ret, []rune(s)...) - ret = append(ret, ';') - } - return append(ret, ei.curch) - } - return nil -} - -// newEscapeInterpreter returns an escapeInterpreter that will be able to parse -// terminal escape sequences. -func newEscapeInterpreter(mode OutputMode) *escapeInterpreter { - ei := &escapeInterpreter{ - state: stateNone, - curFgColor: ColorDefault, - curBgColor: ColorDefault, - mode: mode, - } - return ei -} - -// reset sets the escapeInterpreter in initial state. -func (ei *escapeInterpreter) reset() { - ei.state = stateNone - ei.curFgColor = ColorDefault - ei.curBgColor = ColorDefault - ei.csiParam = nil -} - -// parseOne parses a rune. If isEscape is true, it means that the rune is part -// of an escape sequence, and as such should not be printed verbatim. Otherwise, -// it's not an escape sequence. -func (ei *escapeInterpreter) parseOne(ch rune) (isEscape bool, err error) { - // Sanity checks - if len(ei.csiParam) > 20 { - return false, errCSITooLong - } - if len(ei.csiParam) > 0 && len(ei.csiParam[len(ei.csiParam)-1]) > 255 { - return false, errCSITooLong - } - - ei.curch = ch - - switch ei.state { - case stateNone: - if ch == 0x1b { - ei.state = stateEscape - return true, nil - } - return false, nil - case stateEscape: - if ch == '[' { - ei.state = stateCSI - return true, nil - } - return false, errNotCSI - case stateCSI: - switch { - case ch >= '0' && ch <= '9': - ei.csiParam = append(ei.csiParam, "") - case ch == 'm': - ei.csiParam = append(ei.csiParam, "0") - default: - return false, errCSIParseError - } - ei.state = stateParams - fallthrough - case stateParams: - switch { - case ch >= '0' && ch <= '9': - ei.csiParam[len(ei.csiParam)-1] += string(ch) - return true, nil - case ch == ';': - ei.csiParam = append(ei.csiParam, "") - return true, nil - case ch == 'm': - var err error - switch ei.mode { - case OutputNormal: - err = ei.outputNormal() - case Output256: - err = ei.output256() - } - if err != nil { - return false, errCSIParseError - } - - ei.state = stateNone - ei.csiParam = nil - return true, nil - default: - return false, errCSIParseError - } - } - return false, nil -} - -// outputNormal provides 8 different colors: -// black, red, green, yellow, blue, magenta, cyan, white -func (ei *escapeInterpreter) outputNormal() error { - for _, param := range ei.csiParam { - p, err := strconv.Atoi(param) - if err != nil { - return errCSIParseError - } - - switch { - case p >= 30 && p <= 37: - ei.curFgColor = Attribute(p - 30 + 1) - case p == 39: - ei.curFgColor = ColorDefault - case p >= 40 && p <= 47: - ei.curBgColor = Attribute(p - 40 + 1) - case p == 49: - ei.curBgColor = ColorDefault - case p == 1: - ei.curFgColor |= AttrBold - case p == 4: - ei.curFgColor |= AttrUnderline - case p == 7: - ei.curFgColor |= AttrReverse - case p == 0: - ei.curFgColor = ColorDefault - ei.curBgColor = ColorDefault - } - } - - return nil -} - -// output256 allows you to leverage the 256-colors terminal mode: -// 0x01 - 0x08: the 8 colors as in OutputNormal -// 0x09 - 0x10: Color* | AttrBold -// 0x11 - 0xe8: 216 different colors -// 0xe9 - 0x1ff: 24 different shades of grey -func (ei *escapeInterpreter) output256() error { - if len(ei.csiParam) < 3 { - return ei.outputNormal() - } - - mode, err := strconv.Atoi(ei.csiParam[1]) - if err != nil { - return errCSIParseError - } - if mode != 5 { - return ei.outputNormal() - } - - for _, param := range splitFgBg(ei.csiParam) { - fgbg, err := strconv.Atoi(param[0]) - if err != nil { - return errCSIParseError - } - color, err := strconv.Atoi(param[2]) - if err != nil { - return errCSIParseError - } - - switch fontEffect(fgbg) { - case setForegroundColor: - ei.curFgColor = Attribute(color + 1) - - for _, s := range param[3:] { - p, err := strconv.Atoi(s) - if err != nil { - return errCSIParseError - } - - switch fontEffect(p) { - case bold: - ei.curFgColor |= AttrBold - case underline: - ei.curFgColor |= AttrUnderline - case reverse: - ei.curFgColor |= AttrReverse - - } - } - case setBackgroundColor: - ei.curBgColor = Attribute(color + 1) - default: - return errCSIParseError - } - } - return nil -} - -func splitFgBg(params []string) [][]string { - var out [][]string - var current []string - for _, p := range params { - if len(current) == 3 && (p == "48" || p == "38") { - out = append(out, current) - current = []string{} - } - current = append(current, p) - } - - if len(current) > 0 { - out = append(out, current) - } - - return out -} |