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427 lines
12 KiB
427 lines
12 KiB
// Copyright 2013 bee authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"): you may
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// not use this file except in compliance with the License. You may obtain
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// 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, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations
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// under the License.
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// +build windows
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package colors
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import (
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"bytes"
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"io"
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"strings"
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"syscall"
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"unsafe"
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)
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type csiState int
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const (
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outsideCsiCode csiState = iota
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firstCsiCode
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secondCsiCode
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)
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type parseResult int
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const (
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noConsole parseResult = iota
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changedColor
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unknown
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)
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type colorWriter struct {
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w io.Writer
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mode outputMode
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state csiState
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paramStartBuf bytes.Buffer
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paramBuf bytes.Buffer
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}
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const (
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firstCsiChar byte = '\x1b'
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secondeCsiChar byte = '['
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separatorChar byte = ';'
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sgrCode byte = 'm'
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)
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const (
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foregroundBlue = uint16(0x0001)
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foregroundGreen = uint16(0x0002)
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foregroundRed = uint16(0x0004)
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foregroundIntensity = uint16(0x0008)
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backgroundBlue = uint16(0x0010)
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backgroundGreen = uint16(0x0020)
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backgroundRed = uint16(0x0040)
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backgroundIntensity = uint16(0x0080)
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underscore = uint16(0x8000)
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foregroundMask = foregroundBlue | foregroundGreen | foregroundRed | foregroundIntensity
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backgroundMask = backgroundBlue | backgroundGreen | backgroundRed | backgroundIntensity
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)
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const (
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ansiReset = "0"
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ansiIntensityOn = "1"
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ansiIntensityOff = "21"
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ansiUnderlineOn = "4"
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ansiUnderlineOff = "24"
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ansiBlinkOn = "5"
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ansiBlinkOff = "25"
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ansiForegroundBlack = "30"
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ansiForegroundRed = "31"
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ansiForegroundGreen = "32"
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ansiForegroundYellow = "33"
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ansiForegroundBlue = "34"
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ansiForegroundMagenta = "35"
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ansiForegroundCyan = "36"
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ansiForegroundWhite = "37"
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ansiForegroundDefault = "39"
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ansiBackgroundBlack = "40"
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ansiBackgroundRed = "41"
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ansiBackgroundGreen = "42"
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ansiBackgroundYellow = "43"
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ansiBackgroundBlue = "44"
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ansiBackgroundMagenta = "45"
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ansiBackgroundCyan = "46"
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ansiBackgroundWhite = "47"
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ansiBackgroundDefault = "49"
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ansiLightForegroundGray = "90"
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ansiLightForegroundRed = "91"
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ansiLightForegroundGreen = "92"
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ansiLightForegroundYellow = "93"
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ansiLightForegroundBlue = "94"
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ansiLightForegroundMagenta = "95"
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ansiLightForegroundCyan = "96"
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ansiLightForegroundWhite = "97"
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ansiLightBackgroundGray = "100"
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ansiLightBackgroundRed = "101"
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ansiLightBackgroundGreen = "102"
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ansiLightBackgroundYellow = "103"
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ansiLightBackgroundBlue = "104"
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ansiLightBackgroundMagenta = "105"
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ansiLightBackgroundCyan = "106"
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ansiLightBackgroundWhite = "107"
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)
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type drawType int
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const (
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foreground drawType = iota
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background
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)
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type winColor struct {
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code uint16
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drawType drawType
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}
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var colorMap = map[string]winColor{
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ansiForegroundBlack: {0, foreground},
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ansiForegroundRed: {foregroundRed, foreground},
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ansiForegroundGreen: {foregroundGreen, foreground},
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ansiForegroundYellow: {foregroundRed | foregroundGreen, foreground},
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ansiForegroundBlue: {foregroundBlue, foreground},
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ansiForegroundMagenta: {foregroundRed | foregroundBlue, foreground},
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ansiForegroundCyan: {foregroundGreen | foregroundBlue, foreground},
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ansiForegroundWhite: {foregroundRed | foregroundGreen | foregroundBlue, foreground},
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ansiForegroundDefault: {foregroundRed | foregroundGreen | foregroundBlue, foreground},
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ansiBackgroundBlack: {0, background},
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ansiBackgroundRed: {backgroundRed, background},
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ansiBackgroundGreen: {backgroundGreen, background},
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ansiBackgroundYellow: {backgroundRed | backgroundGreen, background},
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ansiBackgroundBlue: {backgroundBlue, background},
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ansiBackgroundMagenta: {backgroundRed | backgroundBlue, background},
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ansiBackgroundCyan: {backgroundGreen | backgroundBlue, background},
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ansiBackgroundWhite: {backgroundRed | backgroundGreen | backgroundBlue, background},
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ansiBackgroundDefault: {0, background},
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ansiLightForegroundGray: {foregroundIntensity, foreground},
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ansiLightForegroundRed: {foregroundIntensity | foregroundRed, foreground},
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ansiLightForegroundGreen: {foregroundIntensity | foregroundGreen, foreground},
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ansiLightForegroundYellow: {foregroundIntensity | foregroundRed | foregroundGreen, foreground},
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ansiLightForegroundBlue: {foregroundIntensity | foregroundBlue, foreground},
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ansiLightForegroundMagenta: {foregroundIntensity | foregroundRed | foregroundBlue, foreground},
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ansiLightForegroundCyan: {foregroundIntensity | foregroundGreen | foregroundBlue, foreground},
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ansiLightForegroundWhite: {foregroundIntensity | foregroundRed | foregroundGreen | foregroundBlue, foreground},
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ansiLightBackgroundGray: {backgroundIntensity, background},
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ansiLightBackgroundRed: {backgroundIntensity | backgroundRed, background},
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ansiLightBackgroundGreen: {backgroundIntensity | backgroundGreen, background},
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ansiLightBackgroundYellow: {backgroundIntensity | backgroundRed | backgroundGreen, background},
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ansiLightBackgroundBlue: {backgroundIntensity | backgroundBlue, background},
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ansiLightBackgroundMagenta: {backgroundIntensity | backgroundRed | backgroundBlue, background},
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ansiLightBackgroundCyan: {backgroundIntensity | backgroundGreen | backgroundBlue, background},
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ansiLightBackgroundWhite: {backgroundIntensity | backgroundRed | backgroundGreen | backgroundBlue, background},
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}
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var (
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kernel32 = syscall.NewLazyDLL("kernel32.dll")
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procSetConsoleTextAttribute = kernel32.NewProc("SetConsoleTextAttribute")
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procGetConsoleScreenBufferInfo = kernel32.NewProc("GetConsoleScreenBufferInfo")
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defaultAttr *textAttributes
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)
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func init() {
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screenInfo := getConsoleScreenBufferInfo(uintptr(syscall.Stdout))
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if screenInfo != nil {
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colorMap[ansiForegroundDefault] = winColor{
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screenInfo.WAttributes & (foregroundRed | foregroundGreen | foregroundBlue),
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foreground,
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}
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colorMap[ansiBackgroundDefault] = winColor{
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screenInfo.WAttributes & (backgroundRed | backgroundGreen | backgroundBlue),
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background,
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}
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defaultAttr = convertTextAttr(screenInfo.WAttributes)
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}
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}
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type coord struct {
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X, Y int16
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}
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type smallRect struct {
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Left, Top, Right, Bottom int16
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}
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type consoleScreenBufferInfo struct {
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DwSize coord
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DwCursorPosition coord
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WAttributes uint16
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SrWindow smallRect
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DwMaximumWindowSize coord
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}
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func getConsoleScreenBufferInfo(hConsoleOutput uintptr) *consoleScreenBufferInfo {
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var csbi consoleScreenBufferInfo
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ret, _, _ := procGetConsoleScreenBufferInfo.Call(
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hConsoleOutput,
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uintptr(unsafe.Pointer(&csbi)))
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if ret == 0 {
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return nil
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}
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return &csbi
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}
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func setConsoleTextAttribute(hConsoleOutput uintptr, wAttributes uint16) bool {
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ret, _, _ := procSetConsoleTextAttribute.Call(
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hConsoleOutput,
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uintptr(wAttributes))
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return ret != 0
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}
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type textAttributes struct {
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foregroundColor uint16
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backgroundColor uint16
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foregroundIntensity uint16
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backgroundIntensity uint16
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underscore uint16
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otherAttributes uint16
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}
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func convertTextAttr(winAttr uint16) *textAttributes {
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fgColor := winAttr & (foregroundRed | foregroundGreen | foregroundBlue)
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bgColor := winAttr & (backgroundRed | backgroundGreen | backgroundBlue)
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fgIntensity := winAttr & foregroundIntensity
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bgIntensity := winAttr & backgroundIntensity
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underline := winAttr & underscore
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otherAttributes := winAttr &^ (foregroundMask | backgroundMask | underscore)
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return &textAttributes{fgColor, bgColor, fgIntensity, bgIntensity, underline, otherAttributes}
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}
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func convertWinAttr(textAttr *textAttributes) uint16 {
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var winAttr uint16
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winAttr |= textAttr.foregroundColor
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winAttr |= textAttr.backgroundColor
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winAttr |= textAttr.foregroundIntensity
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winAttr |= textAttr.backgroundIntensity
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winAttr |= textAttr.underscore
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winAttr |= textAttr.otherAttributes
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return winAttr
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}
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func changeColor(param []byte) parseResult {
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screenInfo := getConsoleScreenBufferInfo(uintptr(syscall.Stdout))
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if screenInfo == nil {
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return noConsole
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}
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winAttr := convertTextAttr(screenInfo.WAttributes)
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strParam := string(param)
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if len(strParam) <= 0 {
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strParam = "0"
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}
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csiParam := strings.Split(strParam, string(separatorChar))
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for _, p := range csiParam {
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c, ok := colorMap[p]
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switch {
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case !ok:
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switch p {
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case ansiReset:
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winAttr.foregroundColor = defaultAttr.foregroundColor
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winAttr.backgroundColor = defaultAttr.backgroundColor
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winAttr.foregroundIntensity = defaultAttr.foregroundIntensity
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winAttr.backgroundIntensity = defaultAttr.backgroundIntensity
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winAttr.underscore = 0
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winAttr.otherAttributes = 0
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case ansiIntensityOn:
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winAttr.foregroundIntensity = foregroundIntensity
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case ansiIntensityOff:
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winAttr.foregroundIntensity = 0
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case ansiUnderlineOn:
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winAttr.underscore = underscore
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case ansiUnderlineOff:
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winAttr.underscore = 0
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case ansiBlinkOn:
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winAttr.backgroundIntensity = backgroundIntensity
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case ansiBlinkOff:
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winAttr.backgroundIntensity = 0
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default:
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// unknown code
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}
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case c.drawType == foreground:
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winAttr.foregroundColor = c.code
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case c.drawType == background:
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winAttr.backgroundColor = c.code
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}
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}
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winTextAttribute := convertWinAttr(winAttr)
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setConsoleTextAttribute(uintptr(syscall.Stdout), winTextAttribute)
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return changedColor
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}
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func parseEscapeSequence(command byte, param []byte) parseResult {
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if defaultAttr == nil {
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return noConsole
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}
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switch command {
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case sgrCode:
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return changeColor(param)
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default:
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return unknown
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}
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}
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func (cw *colorWriter) flushBuffer() (int, error) {
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return cw.flushTo(cw.w)
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}
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func (cw *colorWriter) resetBuffer() (int, error) {
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return cw.flushTo(nil)
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}
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func (cw *colorWriter) flushTo(w io.Writer) (int, error) {
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var n1, n2 int
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var err error
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startBytes := cw.paramStartBuf.Bytes()
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cw.paramStartBuf.Reset()
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if w != nil {
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n1, err = cw.w.Write(startBytes)
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if err != nil {
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return n1, err
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}
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} else {
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n1 = len(startBytes)
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}
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paramBytes := cw.paramBuf.Bytes()
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cw.paramBuf.Reset()
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if w != nil {
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n2, err = cw.w.Write(paramBytes)
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if err != nil {
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return n1 + n2, err
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}
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} else {
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n2 = len(paramBytes)
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}
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return n1 + n2, nil
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}
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func isParameterChar(b byte) bool {
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return ('0' <= b && b <= '9') || b == separatorChar
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}
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func (cw *colorWriter) Write(p []byte) (int, error) {
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var r, nw, first, last int
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if cw.mode != DiscardNonColorEscSeq {
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cw.state = outsideCsiCode
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cw.resetBuffer()
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}
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var err error
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for i, ch := range p {
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switch cw.state {
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case outsideCsiCode:
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if ch == firstCsiChar {
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cw.paramStartBuf.WriteByte(ch)
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cw.state = firstCsiCode
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}
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case firstCsiCode:
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switch ch {
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case firstCsiChar:
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cw.paramStartBuf.WriteByte(ch)
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break
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case secondeCsiChar:
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cw.paramStartBuf.WriteByte(ch)
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cw.state = secondCsiCode
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last = i - 1
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default:
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cw.resetBuffer()
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cw.state = outsideCsiCode
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}
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case secondCsiCode:
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if isParameterChar(ch) {
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cw.paramBuf.WriteByte(ch)
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} else {
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nw, err = cw.w.Write(p[first:last])
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r += nw
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if err != nil {
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return r, err
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}
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first = i + 1
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result := parseEscapeSequence(ch, cw.paramBuf.Bytes())
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if result == noConsole || (cw.mode == OutputNonColorEscSeq && result == unknown) {
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cw.paramBuf.WriteByte(ch)
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nw, err := cw.flushBuffer()
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if err != nil {
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return r, err
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}
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r += nw
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} else {
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n, _ := cw.resetBuffer()
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// Add one more to the size of the buffer for the last ch
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r += n + 1
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}
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cw.state = outsideCsiCode
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}
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default:
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cw.state = outsideCsiCode
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}
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}
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if cw.mode != DiscardNonColorEscSeq || cw.state == outsideCsiCode {
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nw, err = cw.w.Write(p[first:])
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r += nw
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}
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return r, err
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}
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