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cpick.go
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cpick.go
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// Package cpick is an interactive color picker in the terminal using cview
package cpick
import (
"encoding/json"
"fmt"
"io/ioutil"
"log"
"math"
"os"
"os/user"
"regexp"
"strconv"
"strings"
color "github.com/ethanbaker/colors"
"github.com/ethanbaker/cpick/cview"
"github.com/gdamore/tcell/v2"
)
// Breakpoint boundaries
const BREAKPOINT_HEIGHT = 30
const BREAKPOINT_WIDTH = 110
// Global configuration variables
var testingMode = false
var smallWidth = false
var smallHeight = false
// jsonColorInfo type used to hold imported colors
type jsonColorInfo struct {
name string
length int
colors []jsonColor
table *cview.Table
}
// ColorValues type used to hold color values and optional name
type ColorValues struct {
RGB color.RGB
HSV color.HSV
HSL color.HSL
CMYK color.CMYK
Hex color.Hex
Decimal color.Decimal
Ansi color.Ansi
Name string
}
var colorBlockWide string = `
███████████████████
███████████████████
███████████████████
███████████████████
`
var colorBlockSmall string = `
████████████
`
var colorTextWide string = `
RGB: %v, %v, %v
HSV: %v°, %v%%, %v%%
HSL: %v°, %v%%, %v%%
CMYK: %v%%, %v%%, %v%%, %v%%
Hex: #%v
Decimal: %v
Ansi: "\033%v"
`
var colorTextSmall string = `
RGB: %v,%v,%v
HSV: %v°,%v%%,%v%%
HSL: %v°,%v%%,%v%%
CMYK: %v%%,%v%%
%v%%,%v%%
Hex: #%v
Decimal: %v
Ansi:
"\033%v"
`
var colorPageText string = "██████████ %v %v "
var helpString string = `
Movement: vim keys (h,j,k,l) or arrow keys
Quitting the application: escape or q
While on the hue table:
- Press enter to create a new saturation-value table
- Press space to select the preset color table
- Press tab to switch to the saturation-value table
While on the preset color table:
- Press enter to create a new saturation-value table
- Press space to select the hue table
- Press tab to switch to the saturation-value table
- Press C to go to the next color page
- Press c to go to the previous color page
- Press ? to enter a search menu for colors
- Press N to go to the next search instance
- Press n to go to the previous search instance
While on the saturation-value table:
- Press enter to select the final color
- Press tab to switch to the hue table
`
var searchHelpString string = `
To search for a color name, type the name of the color into the search bar. Related colors will appear below.
Once a color (or phrase) is desired, press enter. You can press N (forward) and n (reverse) to swap between instances.
Each value type you want to select will have instructions below:
- Hexadecimal: type the hex value starting with "#" (EX: #ffffff)
- RGB: type "rgb:" and three RGB values separated by a space (EX: rgb: 255 255 255)
- HSV: type "hsv:" and three HSV values separated by a space (EX: hsv: 0 100 0)
- HSL: type "hsl:" and three HSL values separated by a space (EX: hsl: 0 100 50)
- CMYK: type "cmyk:" and four CMYK values separated by a space (EX: cmyk: 0 0 0 0)
- Decimal: type "decimal:" and then the decimal value (EX: 16777215)
Once a color is selected, you will be taken to the Saturation-Value table with the specified color selected.
Any errors that you make will appear in red below the search bar.
`
// Global variables to make up elements on screen
var app *cview.Application = cview.NewApplication()
var pages *cview.Pages = cview.NewPages()
var hFlex *cview.Flex = cview.NewFlex()
var svFlex *cview.Flex = cview.NewFlex()
var hTable *cview.Table = cview.NewTable()
var svTable *cview.Table = cview.NewTable()
var darkHBlock *cview.TextView = cview.NewTextView()
var darkHText *cview.TextView = cview.NewTextView()
var lightHBlock *cview.TextView = cview.NewTextView()
var lightHText *cview.TextView = cview.NewTextView()
var darkSVBlock *cview.TextView = cview.NewTextView()
var darkSVText *cview.TextView = cview.NewTextView()
var lightSVBlock *cview.TextView = cview.NewTextView()
var lightSVText *cview.TextView = cview.NewTextView()
var colorPageTitle *cview.TextView = cview.NewTextView()
var jsonColors *cview.Flex = cview.NewFlex()
var colorPages *cview.Pages = cview.NewPages()
var colorPageIndex int
var colorInfo []jsonColorInfo
var helpFlex *cview.Flex = cview.NewFlex()
var helpModal *cview.Modal = cview.NewModal()
var helpFocus cview.Primitive = hTable
var searchFlex *cview.Flex = cview.NewFlex()
var searchStatus *cview.TextView = cview.NewTextView()
var searchInput *cview.InputField = cview.NewInputField()
var searchNames []string
var searchIndexes [][]int
var searchIndex int
var hFocus cview.Primitive = hTable
var hue int
var returnColor ColorValues
// Input Handlers ---------------------------------------------------------
func inputCaptureHandler(event *tcell.EventKey) *tcell.EventKey {
switch {
case event.Rune() == 'q':
if !searchFlex.HasFocus() {
app.Stop()
}
case event.Rune() == '`':
showHelp()
case event.Key() == tcell.KeyCtrlF || event.Rune() == '?':
showSearch()
return nil
}
if svTable.HasFocus() {
event = svCaptureHandler(event)
} else if hTable.HasFocus() {
event = hCaptureHandler(event)
} else if colorPages.HasFocus() {
event = colorPageCaptureHandler(event)
}
return event
}
func svCaptureHandler(event *tcell.EventKey) *tcell.EventKey {
return event
}
func hCaptureHandler(event *tcell.EventKey) *tcell.EventKey {
switch {
case event.Rune() == ' ':
hFocus = colorPages
app.SetFocus(colorPages)
row, col := colorInfo[colorPageIndex].table.GetSelection()
text := colorInfo[colorPageIndex].table.GetCell(row, col).Text
raw := strings.Split(string(text[:]), "#")
hsv := color.HextoHSV(color.Hex(raw[1]))
darkHSV := hsv
lightHSV := hsv
if hsv.V%2 == 0 {
darkHSV.V -= 1
} else {
lightHSV.V += 1
}
setColorValues(darkHSV, darkHBlock, darkHText, lightHSV, lightHBlock, lightHText)
colorInfo[colorPageIndex].table.SetSelectedStyle(tcell.ColorDefault, tcell.ColorGray, tcell.AttrNone)
}
return event
}
func colorPageCaptureHandler(event *tcell.EventKey) *tcell.EventKey {
switch {
// Change pages of color tables
case event.Rune() == 'C':
if colorPageIndex < len(colorInfo)-1 {
colorPageIndex++
colorInfo[colorPageIndex].table.SetSelectedStyle(tcell.ColorDefault, tcell.ColorGray, tcell.AttrNone)
name := colorInfo[colorPageIndex].name
colorPageTitle.SetText(name)
pageId := fmt.Sprintf("page-%d", colorPageIndex)
colorPages.SwitchToPage(pageId)
row, col := colorInfo[colorPageIndex].table.GetSelection()
text := string(colorInfo[colorPageIndex].table.GetCell(row, col).Text[:])
raw := strings.Split(text, "#")
hsv := color.HextoHSV(color.Hex(raw[1]))
darkHSV := hsv
lightHSV := hsv
if hsv.V%2 == 0 {
darkHSV.V -= 1
} else {
lightHSV.V += 1
}
setColorValues(darkHSV, darkHBlock, darkHText, lightHSV, lightHBlock, lightHText)
}
case event.Rune() == 'c':
if colorPageIndex > 0 {
colorPageIndex--
colorInfo[colorPageIndex].table.SetSelectedStyle(tcell.ColorDefault, tcell.ColorGray, tcell.AttrNone)
name := colorInfo[colorPageIndex].name
colorPageTitle.SetText(name)
pageId := fmt.Sprintf("page-%d", colorPageIndex)
colorPages.SwitchToPage(pageId)
row, col := colorInfo[colorPageIndex].table.GetSelection()
text := string(colorInfo[colorPageIndex].table.GetCell(row, col).Text[:])
raw := strings.Split(text, "#")
hsv := color.HextoHSV(color.Hex(raw[1]))
darkHSV := hsv
lightHSV := hsv
if hsv.V%2 == 0 {
darkHSV.V -= 1
} else {
lightHSV.V += 1
}
setColorValues(darkHSV, darkHBlock, darkHText, lightHSV, lightHBlock, lightHText)
}
// Switch to hTable
case event.Rune() == ' ':
hFocus = hTable
app.SetFocus(hTable)
_, col := hTable.GetSelection()
darkHSV := color.HSV{H: col * 2, S: 100, V: 100}
lightHSV := color.HSV{H: col*2 + 1, S: 100, V: 100}
setColorValues(darkHSV, darkHBlock, darkHText, lightHSV, lightHBlock, lightHText)
colorInfo[colorPageIndex].table.SetSelectedStyle(tcell.ColorDefault, tcell.ColorDefault, tcell.AttrBold)
}
searchInputCaptureHandler(event)
return colorPageMovementHandler(event)
}
// Handle any movement events by preventing the user from selecting
// a blank filler cell
func colorPageMovementHandler(event *tcell.EventKey) *tcell.EventKey {
switch {
case event.Rune() == 'l' || event.Key() == tcell.KeyRight:
row, col := colorInfo[colorPageIndex].table.GetSelection()
if col < colorInfo[colorPageIndex].table.GetColumnCount()-1 {
cell := colorInfo[colorPageIndex].table.GetCell(row, col+1)
if len(cell.Text) == 0 {
return nil
}
}
case event.Rune() == 'j' || event.Key() == tcell.KeyDown:
row, col := colorInfo[colorPageIndex].table.GetSelection()
if row < colorInfo[colorPageIndex].table.GetRowCount()-1 {
cell := colorInfo[colorPageIndex].table.GetCell(row+1, col)
if len(cell.Text) == 0 {
return nil
}
}
case event.Rune() == 'G':
row := colorInfo[colorPageIndex].table.GetRowCount() - 1
col := colorInfo[colorPageIndex].table.GetColumnCount() - 1
for true {
cell := colorInfo[colorPageIndex].table.GetCell(row, col)
if len(cell.Text) != 0 {
break
} else {
row--
}
}
colorInfo[colorPageIndex].table.Select(row, col)
return nil
}
return event
}
func searchInputCaptureHandler(event *tcell.EventKey) *tcell.EventKey {
if len(searchIndexes) > 1 {
switch event.Rune() {
// Go back a selection
case 'n':
if searchIndex == 0 {
searchIndex = len(searchIndexes)
}
searchIndex--
colorPages.SwitchToPage(fmt.Sprintf("page-%v", searchIndexes[searchIndex][0]))
colorPageIndex = searchIndexes[searchIndex][0]
colorInfo[colorPageIndex].table.Select(searchIndexes[searchIndex][2], searchIndexes[searchIndex][1])
colorInfo[colorPageIndex].table.SetSelectedStyle(tcell.ColorDefault, tcell.ColorGray, tcell.AttrNone)
// Go forward a selection
case 'N':
if searchIndex == len(searchIndexes)-1 {
searchIndex = -1
}
searchIndex++
colorPages.SwitchToPage(fmt.Sprintf("page-%v", searchIndexes[searchIndex][0]))
colorPageIndex = searchIndexes[searchIndex][0]
colorInfo[colorPageIndex].table.Select(searchIndexes[searchIndex][2], searchIndexes[searchIndex][1])
colorInfo[colorPageIndex].table.SetSelectedStyle(tcell.ColorDefault, tcell.ColorGray, tcell.AttrNone)
}
}
return event
}
// Screen setup -----------------------------------------------------------
func hScreenSetup() {
// Dark color value setup
darkText := cview.NewTextView()
darkText.SetScrollBarVisibility(cview.ScrollBarNever)
if !smallWidth && !smallHeight {
darkText.SetText("Dark Tint Color")
darkHBlock.SetText(colorBlockWide)
} else {
darkText.SetText("Color")
darkHBlock.SetText(colorBlockSmall)
}
darkHBlock.SetScrollBarVisibility(cview.ScrollBarNever)
darkHText.SetScrollBarVisibility(cview.ScrollBarNever)
darkColorFlex := cview.NewFlex()
darkColorFlex.SetDirection(cview.FlexRow)
darkColorFlex.AddItem(darkText, 0, 1, false)
darkColorFlex.AddItem(darkHBlock, 0, 2, false)
darkColorFlex.AddItem(darkHText, 0, 9, false)
// Light color value setup
lightText := cview.NewTextView()
lightColorFlex := cview.NewFlex()
if !smallHeight && !smallWidth {
lightText.SetScrollBarVisibility(cview.ScrollBarNever)
lightText.SetText(" Light Tint Color")
lightHBlock.SetText(colorBlockWide)
lightHBlock.SetScrollBarVisibility(cview.ScrollBarNever)
lightHText.SetScrollBarVisibility(cview.ScrollBarNever)
lightColorFlex.SetDirection(cview.FlexRow)
lightColorFlex.AddItem(lightText, 0, 1, false)
lightColorFlex.AddItem(lightHBlock, 0, 2, false)
lightColorFlex.AddItem(lightHText, 0, 9, false)
}
colorFlex := cview.NewFlex()
colorFlex.SetDirection(cview.FlexRow)
colorFlex.AddItem(darkColorFlex, 0, 1, false)
if !smallHeight && !smallWidth {
colorFlex.AddItem(lightColorFlex, 0, 1, false)
}
// Everything except hTable setup
lowerFlex := cview.NewFlex()
lowerFlex.SetDirection(cview.FlexColumn)
lowerFlex.AddItem(colorFlex, 0, 3, false)
lowerFlex.AddItem(jsonColors, 0, 9, false)
help := cview.NewTextView()
help.SetTextAlign(cview.AlignRight)
help.SetText("Press ` to see help")
hFlex.SetDirection(cview.FlexRow)
hFlex.AddItem(hTable, 0, 1, true)
hFlex.AddItem(help, 0, 1, false)
hFlex.AddItem(lowerFlex, 0, 20, false)
darkHSV := color.HSV{H: 0, S: 100, V: 100}
lightHSV := color.HSV{H: 0, S: 100, V: 100}
setColorValues(darkHSV, darkHBlock, darkHText, lightHSV, lightHBlock, lightHText)
}
func svScreenSetup() {
// Fill the text with the default values
darkSVBlock.SetScrollBarVisibility(cview.ScrollBarNever)
lightSVBlock.SetScrollBarVisibility(cview.ScrollBarNever)
if !smallWidth && !smallHeight {
darkSVBlock.SetText(colorBlockWide)
lightSVBlock.SetText(colorBlockWide)
} else {
darkSVBlock.SetText(colorBlockSmall)
}
darkHSV := color.HSV{H: 0, S: 100, V: 99}
lightHSV := color.HSV{H: 0, S: 100, V: 100}
setColorValues(darkHSV, darkSVBlock, darkSVText, lightHSV, lightSVBlock, lightSVText)
// Setup the screen
darkTitle := cview.NewTextView()
if !smallWidth && !smallHeight {
darkTitle.SetText(" Dark Tint Color")
} else {
darkTitle.SetText(" Color")
}
darkSVText.SetScrollBarVisibility(cview.ScrollBarNever)
darkSVFlex := cview.NewFlex()
darkSVFlex.SetDirection(cview.FlexRow)
darkSVFlex.AddItem(darkTitle, 0, 1, false)
darkSVFlex.AddItem(darkSVBlock, 0, 2, false)
darkSVFlex.AddItem(darkSVText, 0, 9, false)
lightTitle := cview.NewTextView()
lightSVFlex := cview.NewFlex()
if !smallHeight && !smallWidth {
lightTitle.SetText(" Light Tint Color")
lightSVText.SetScrollBarVisibility(cview.ScrollBarNever)
lightSVFlex.SetDirection(cview.FlexRow)
lightSVFlex.AddItem(lightTitle, 0, 1, false)
lightSVFlex.AddItem(lightSVBlock, 0, 2, false)
lightSVFlex.AddItem(lightSVText, 0, 9, false)
}
colorFlex := cview.NewFlex()
colorFlex.SetDirection(cview.FlexRow)
colorFlex.AddItem(darkSVFlex, 0, 1, false)
if !smallHeight && !smallWidth {
colorFlex.AddItem(lightSVFlex, 0, 1, false)
}
svFlex.AddItem(svTable, 0, 4, false)
svFlex.AddItem(colorFlex, 0, 1, false)
}
// Help page setup --------------------------------------------------------
func helpPageSetup() {
helpModal.SetText(helpString)
helpModal.AddButtons([]string{"Exit help"})
helpModal.SetDoneFunc(helpModalDoneFunc)
helpFlex.AddItem(helpModal, 0, 1, false)
}
func helpModalDoneFunc(buttonIndex int, buttonLabel string) {
if buttonLabel == "Exit help" {
if helpFocus == hTable || helpFocus == colorPages {
hFlex.RemoveItem(helpFlex)
} else if helpFocus == svTable {
svFlex.RemoveItem(helpFlex)
svFlex.SetDirection(cview.FlexColumn)
}
app.SetFocus(helpFocus)
}
}
// Search page setup ------------------------------------------------------
func searchInputSetup() {
for i := 0; i < len(colorInfo); i++ {
for _, c := range colorInfo[i].colors {
searchNames = append(searchNames, strings.ToLower(c.NAME))
}
}
searchInput.SetLabel("Enter a color name or value to search for: ")
searchInput.SetFieldWidth(60)
searchInput.SetDoneFunc(searchInputDoneFunc)
searchInput.SetAutocompleteFunc(searchInputAutocompleteFunc)
searchStatus.SetTextColor(tcell.ColorRed)
searchHelp := cview.NewTextView()
searchHelp.SetText(searchHelpString)
searchFlex.SetDirection(cview.FlexRow)
searchFlex.AddItem(searchInput, 0, 1, false)
searchFlex.AddItem(searchStatus, 0, 1, false)
searchFlex.AddItem(searchHelp, 0, 4, false)
}
func searchInputDoneFunc(key tcell.Key) {
switch key {
// Go back to the main application
case tcell.KeyEscape:
pages.SwitchToPage("Hue page")
colorInfo[colorPageIndex].table.Select(0, 0)
app.SetFocus(colorPages)
// Select a value on the color tables
case tcell.KeyEnter:
text := strings.ToLower(strings.TrimSpace(searchInput.GetText()))
if len(text) > 0 {
parseSearchText(text)
}
}
}
func parseSearchText(text string) {
raw := strings.Split(strings.TrimSpace(strings.Join(strings.Split(text, ":")[1:], "")), " ")
var ints []int
safe := true
for _, v := range raw {
num, err := strconv.ParseInt(v, 10, 64)
if err != nil {
safe = false
break
}
ints = append(ints, int(num))
}
if len(text) > 5 && text[0:5] == "ansi:" {
searchStatus.SetText("Please enter the RGB values inside of the ansi escape sequence")
return
} else if !safe && text[0] != '#' && strings.Contains(text, ":") {
searchStatus.SetText("Please enter valid numbers")
return
}
var hsv color.HSV
var statusMessage string
switch {
case strings.HasPrefix(strings.ToLower(text), strings.ToLower("#")):
matched, err := regexp.MatchString(`[0-9a-fA-F]+`, text)
testErr(err)
if matched && len(text) == 7 {
hsv = color.HextoHSV(color.Hex(text))
} else {
statusMessage = "Please enter a valid hexadecimal value"
}
case strings.HasPrefix(strings.ToLower(text), strings.ToLower("rgb:")):
for _, v := range ints {
if v > 255 || v < 0 {
statusMessage = "Please enter valid RGB values (0 < x < 255)"
}
}
if len(ints) == 3 {
rgb := color.RGB{R: ints[0], G: ints[1], B: ints[2]}
hsv = color.RGBtoHSV(rgb)
} else {
statusMessage = "Please enter 3 RGB values"
}
case strings.HasPrefix(strings.ToLower(text), strings.ToLower("hsv:")):
if ints[0] < 0 || ints[0] > 359 {
statusMessage = "Please enter a valid hue value (0 < x < 359)"
}
for _, v := range ints[1:] {
if v > 100 || v < 0 {
statusMessage = "Please enter valid Saturation and Value values (0 < x < 100)"
}
}
if len(ints) == 3 {
hsv = color.HSV{H: ints[0], S: ints[1], V: ints[2]}
} else {
statusMessage = "Please enter 3 HSV values"
}
case strings.HasPrefix(strings.ToLower(text), strings.ToLower("hsl:")):
if ints[0] < 0 || ints[0] > 359 {
statusMessage = "Please enter a valid hue value (0 < x < 359)"
}
for _, v := range ints[1:] {
if v > 100 || v < 0 {
statusMessage = "Please enter valid Saturation and Length values (0 < x < 100)"
}
}
if len(ints) == 3 {
hsl := color.HSL{H: ints[0], S: ints[1], L: ints[2]}
hsv = color.HSLtoHSV(hsl)
} else {
statusMessage = "Please enter 3 HSL values"
}
case strings.HasPrefix(strings.ToLower(text), strings.ToLower("cmyk:")):
for _, v := range ints[1:] {
if v > 100 || v < 0 {
statusMessage = "Please enter valid CMYK values (0 < x < 100)"
}
}
if len(ints) == 4 {
cmyk := color.CMYK{C: ints[0], M: ints[1], Y: ints[2], K: ints[3]}
hsv = color.CMYKtoHSV(cmyk)
} else {
statusMessage = "Please enter 4 CMYK values"
}
case strings.HasPrefix(strings.ToLower(text), strings.ToLower("decimal:")):
if ints[0] < 0 || ints[0] > 16777215 {
statusMessage = "Please enter a valid decimal value (0 < x < 16777215)"
}
if len(ints) == 1 {
decimal := ints[0]
hsv = color.DecimaltoHSV(color.Decimal(decimal))
} else {
statusMessage = "Please enter 1 decimal value"
}
default:
locations := getColorLocations(text)
searchIndexes = locations
pages.SwitchToPage("Hue page")
app.SetFocus(colorPages)
if len(locations) > 0 {
colorPages.SwitchToPage(fmt.Sprintf("page-%v", locations[0][0]))
colorPageIndex = locations[0][0]
colorInfo[colorPageIndex].table.Select(locations[0][2], locations[0][1])
colorInfo[colorPageIndex].table.SetSelectedStyle(tcell.ColorDefault, tcell.ColorGray, tcell.AttrNone)
}
searchInput.SetText("")
return
}
if statusMessage != "" {
searchStatus.SetText(statusMessage)
return
}
hue = hsv.H
drawSVTable()
svTable.Select(int(math.Round(50-float64(hsv.V/2))), hsv.S)
pages.SwitchToPage("Saturation-Value page")
app.SetFocus(svTable)
searchInput.SetText("")
searchStatus.SetText("")
return
}
func searchInputAutocompleteFunc(currentText string) []*cview.ListItem {
if len(currentText) == 0 {
return nil
}
// Create a list of possible selections
var entries []string
for _, word := range searchNames {
if strings.HasPrefix(strings.ToLower(word), strings.ToLower(currentText)) {
entries = append(entries, word)
}
}
// If the list is 0 or there is only one option that the user already
// typed
if len(entries) < 1 {
entries = nil
} else if len(entries) == 1 && currentText == entries[0] {
entries = nil
}
// Convert strings to list items
var items []*cview.ListItem
for _, v := range entries {
items = append(items, cview.NewListItem(v))
}
return items
}
// Color pages setup ------------------------------------------------------
func colorPageSetup() {
colorInfo = make([]jsonColorInfo, 0)
path, err := getPath()
testErr(err)
var data jsonData
data = getCustomColors(path)
// Get the lists of all of the imported colors
for i := 0; i < len(data.COLORLIST); i++ {
c := jsonColorInfo{}
colorInfo = append(colorInfo, c)
colorInfo[i].name = strings.Title(data.COLORLIST[i].NAME + " pages")
colorInfo[i].length = len(data.COLORLIST[i].COLORS)
colorInfo[i].colors = data.COLORLIST[i].COLORS
for j := 0; j < 8; j++ {
colorInfo[i].colors = append(colorInfo[i].colors, jsonColor{"", "000000"})
}
colorInfo[i].table = cview.NewTable()
colorInfo[i].table.SetCellPadding(3, 0)
colorInfo[i].table.SetScrollBarVisibility(cview.ScrollBarNever)
colorInfo[i].table.SetSelectable(true, true)
colorInfo[i].table.SetSelectedStyle(tcell.ColorDefault, tcell.ColorDefault, tcell.AttrBold)
colorInfo[i].table.SetDoneFunc(colorPageDoneFunc)
colorInfo[i].table.SetSelectedFunc(colorPageSelectedFunc)
colorInfo[i].table.SetSelectionChangedFunc(colorPageSelectionChangedFunc)
}
// Make pages to hold the tables for all of the colors
for colorIndex := 0; colorIndex < len(colorInfo); colorIndex++ {
for x := 0; x < int(math.Ceil(float64(colorInfo[colorIndex].length/9)))+1; x++ {
for y := 0; y < 9; y++ {
rgb := color.HextoRGB(color.Hex(colorInfo[colorIndex].colors[x*9+y].VALUE))
name := strings.ToLower(colorInfo[colorIndex].colors[x*9+y].NAME)
val := strings.ToLower(colorInfo[colorIndex].colors[x*9+y].VALUE)
// Draw the color if it can actually be seen
if colorInfo[colorIndex].colors[x*9+y].NAME == "" {
cell := cview.NewTableCell("")
cell.SetTextColor(0)
colorInfo[colorIndex].table.SetCell(y, x, cell)
} else if rgb.R+rgb.G+rgb.B > 84 {
text := fmt.Sprintf(colorPageText, name, val)
c := tcell.NewHexColor(int32(color.HextoDecimal(color.Hex(val))))
cell := cview.NewTableCell(text)
cell.SetTextColor(c)
colorInfo[colorIndex].table.SetCell(y, x, cell)
} else {
text := fmt.Sprintf("██████████ [white]%v %v ", name, val)
c := tcell.NewHexColor(int32(color.HextoDecimal(color.Hex(val))))
cell := cview.NewTableCell(text)
cell.SetTextColor(c)
colorInfo[colorIndex].table.SetCell(y, x, cell)
}
}
}
pageId := fmt.Sprintf("page-%d", colorIndex)
colorPages.AddPage(pageId, colorInfo[colorIndex].table, true, false)
}
colorPages.SwitchToPage("page-0")
colorPageTitle.SetTextAlign(cview.AlignCenter)
colorPageTitle.SetText(strings.Title(colorInfo[0].name))
// Setup the color page
jsonColors.SetDirection(cview.FlexRow)
jsonColors.AddItem(colorPageTitle, 0, 1, false)
jsonColors.AddItem(colorPages, 0, 10, false)
}
func colorPageDoneFunc(key tcell.Key) {
switch {
case key == tcell.KeyEscape:
app.Stop()
case key == tcell.KeyTab:
pages.SwitchToPage("Saturation-Value page")
app.SetFocus(svTable)
}
}
func colorPageSelectedFunc(row int, column int) {
// Switch to blank saturation-value page
svTable.ScrollToBeginning()
svTable.Clear()
pages.SwitchToPage("Saturation-Value page")
app.SetFocus(svTable)
// Get the color displayed in the table
text := colorInfo[colorPageIndex].table.GetCell(row, column).Text
raw := strings.Split(string(text[:]), "#")
hsv := color.HextoHSV(color.Hex(raw[1]))
cursor := color.HSVtoRGB(color.HSV{H: (hsv.H + 180) % 360, S: 100, V: 100})
c := tcell.NewRGBColor(int32(cursor.R), int32(cursor.G), int32(cursor.B))
svTable.SetSelectedStyle(c, c, tcell.AttrNone)
hue = hsv.H
drawSVTable()
// Move the user to the selected color
x := hsv.S
y := 50 - hsv.V/2
if hsv.V%2 == 1 {
y--
}
svTable.Select(y, x)
}
func colorPageSelectionChangedFunc(row int, column int) {
// Get the color from the table
text := colorInfo[colorPageIndex].table.GetCell(row, column).Text
raw := strings.Split(string(text[:]), "#")
hsv := color.HextoHSV(color.Hex(raw[1]))
// Fill the color format string with the correct values for the selected
// color
darkHSV := hsv
lightHSV := hsv
if hsv.V%2 == 0 {
darkHSV.V -= 1
} else {
lightHSV.V += 1
}
setColorValues(darkHSV, darkHBlock, darkHText, lightHSV, lightHBlock, lightHText)
}
// hTable setup ----------------------------------------------------------
func hTableSetup() {
// Set the hue table with its necessary properties
hTable.SetSelectable(true, true)
hTable.Select(0, 0)
hTable.SetSelectedStyle(tcell.ColorWhite, tcell.ColorWhite, tcell.AttrNone)
hTable.SetCellPadding(0, 0)
// Color the hue table
for h := 0; h < 360; h += 2 {
bg := color.HSVtoRGB(color.HSV{H: h + 1, S: 100, V: 100})
fg := color.HSVtoRGB(color.HSV{H: h, S: 100, V: 100})
bc := tcell.NewRGBColor(int32(bg.R), int32(bg.G), int32(bg.B))
c := tcell.NewRGBColor(int32(fg.R), int32(fg.G), int32(fg.B))
cell := cview.NewTableCell("▐")
cell.SetBackgroundColor(bc)
cell.SetTextColor(c)
hTable.SetCell(0, h/2, cell)
}
hTable.SetDoneFunc(hTableDoneFunc)
hTable.SetSelectedFunc(hTableSelectedFunc)
hTable.SetSelectionChangedFunc(hTableSelectionChangedFunc)
}
func hTableDoneFunc(key tcell.Key) {
switch {
case key == tcell.KeyEscape:
app.Stop()
case key == tcell.KeyTab:
pages.SwitchToPage("Saturation-Value page")
app.SetFocus(svTable)
}
}
func hTableSelectedFunc(row int, column int) {
hue = column * 2
// Switch to saturation-value page with the correct setup
svTable.Clear()
pages.SwitchToPage("Saturation-Value page")
app.SetFocus(svTable)
svTable.Select(0, 100)
cursor := color.HSVtoRGB(color.HSV{H: (hue + 180) % 360, S: 100, V: 100})
c := tcell.NewRGBColor(int32(cursor.R), int32(cursor.G), int32(cursor.B))
svTable.SetSelectedStyle(c, c, tcell.AttrNone)
drawSVTable()
darkHSV := color.HSV{H: hue, S: 100, V: 99}
lightHSV := color.HSV{H: hue, S: 100, V: 100}
setColorValues(darkHSV, darkHBlock, darkHText, lightHSV, lightHBlock, lightHText)
}
func hTableSelectionChangedFunc(row int, column int) {
darkHSV := color.HSV{H: column * 2, S: 100, V: 100}
lightHSV := color.HSV{H: column*2 + 1, S: 100, V: 100}
setColorValues(darkHSV, darkHBlock, darkHText, lightHSV, lightHBlock, lightHText)
}
// svTable setup ---------------------------------------------------------
func svTableSetup() {
drawSVTable()
// 16842751 is cyan which makes the cursor stand out on red table
svTable.SetSelectedStyle(16842751, 16842751, tcell.AttrNone)
svTable.SetSelectable(true, true)
svTable.SetCellPadding(0, 0)
svTable.Select(0, 100)
svTable.SetDoneFunc(svTableDoneFunc)
svTable.SetSelectedFunc(svTableSelectedFunc)
svTable.SetSelectionChangedFunc(svTableSelectionChangedFunc)
}
func svTableDoneFunc(key tcell.Key) {
switch {
case key == tcell.KeyEscape:
app.Stop()
case key == tcell.KeyTab: