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141 lines
3.6 KiB
141 lines
3.6 KiB
// ------------------------------------------------------------------------
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// Project active2
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// Active Thing (activething.com) git.activething.com/go
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//
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// File n active.go
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// Created by DEV
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// Modified 05/04/2024
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//
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// Copyright 2024 activething.com
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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 this 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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// ------------------------------------------------------------------------
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package ansi
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import (
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"bytes"
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)
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const (
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styleAttsStart Code = 1024
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bgMask Code = 0b1111110000011111
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fgMask Code = 0b1111111111100000
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clMask Code = 0b0000001111111111
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txMask Code = 0b1111110000000000
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bgShift int = 5
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stShift int = 10
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styleNumOps int = 3
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)
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var (
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g = struct {
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beginEscIni []byte
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beginEscEnd []byte
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endEsc []byte
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charsEscs []byte
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endEscStr string
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ics []struct { n []byte; f []byte; b []byte }
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itx []struct { n []byte; s []byte }
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}{
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beginEscIni : []byte("\x1b["),
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beginEscEnd : []byte{'m'},
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endEsc : []byte("\x1b[0m"),
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endEscStr : "\x1b[0m",
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ics : []struct { n []byte; f []byte; b []byte } {
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{[]byte("none"), []byte{},[]byte{}},
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{[]byte("black"), []byte{'3','0'},[]byte{'4','0'}},
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{[]byte("red"), []byte{'3','1'},[]byte{'4','1'}},
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{[]byte("green"), []byte{'3','2'},[]byte{'4','2'}},
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{[]byte("yellow"), []byte{'3','3'},[]byte{'4','3'}},
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{[]byte("blue"), []byte{'3','4'},[]byte{'4','4'}},
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{[]byte("magenta"), []byte{'3','5'},[]byte{'4','5'}},
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{[]byte("cyan"), []byte{'3','6'},[]byte{'4','6'}},
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{[]byte("white"), []byte{'3','7'},[]byte{'4','7'}},
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{[]byte("hblack"), []byte{'9','0'},[]byte{'1','0','0'}},
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{[]byte("hred"), []byte{'9','1'},[]byte{'1','0','1'}},
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{[]byte("hgreen"), []byte{'9','2'},[]byte{'1','0','2'}},
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{[]byte("hyellow"), []byte{'9','3'},[]byte{'1','0','3'}},
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{[]byte("hblue"), []byte{'9','4'},[]byte{'1','0','4'}},
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{[]byte("hmagent"), []byte{'9','5'},[]byte{'1','0','5'}},
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{[]byte("hcyan"), []byte{'9','6'},[]byte{'1','0','6'}},
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{[]byte("hwhite"), []byte{'9','7'},[]byte{'1','0','7'}},
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{[]byte("default"), []byte{'3','7'},[]byte{'4','9'}},
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},
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itx : []struct { n []byte; s []byte }{
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{[]byte("bold-on"), []byte{'1'}},
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{[]byte("underline-on"), []byte{'4'}},
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{[]byte("blink-on"), []byte{'5'}},
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{[]byte("bold-off"), []byte{'2','2'}},
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{[]byte("underline-off"),[]byte{'2','5'}},
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{[]byte("blink-off"), []byte{'2','7'}},
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},
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charsEscs : genCharEscapes(),
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}
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)
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func genCharEscapes () []byte {
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r := make([]byte,255)
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r['@']=1
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for i:=int('A'); i<=int('Z'); i++ {
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r[i]=1
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r[i+32]=1
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}
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return r
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}
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func Esc (code Code) string {
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return code.String() }
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func EscEnd () string {
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return g.endEscStr }
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func FilterEscapes (data []byte) []byte {
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var buf bytes.Buffer
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for i := 0; i < len(data); {
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if data[i] != 0x1b {
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buf.WriteByte(data[i])
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i++
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continue
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}
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// Si encuentra una secuencia de escape, salta hasta encontrar un carácter alfabético.
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next := i + 1
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for next < len(data) && g.charsEscs[data[next]] == 0 {
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next++
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}
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i = next
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}
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return buf.Bytes()
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}
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