src/Tui.ps1
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# Tui.ps1 - the interactive console UI (Simple + Detail modes). # Hand-rolled with [Console]::ReadKey + truecolor ANSI so there are zero deps. $e = [char]27 # ESC function Write-Fg { param([string]$Hex, [string]$Text) $r = [convert]::ToInt32($Hex.Substring(1,2),16) $g = [convert]::ToInt32($Hex.Substring(3,2),16) $b = [convert]::ToInt32($Hex.Substring(5,2),16) "$e[38;2;$r;$g;${b}m$Text$e[0m" } # Merge a working composition (hashtable) with optional slot overrides and # return it as a PSCustomObject ready for Resolve-PoshPaletteTheme. function ConvertTo-PPComposition { param([hashtable] $Comp, [hashtable] $Override = @{}) $h = @{} foreach ($k in $Comp.Keys) { $h[$k] = $Comp[$k] } foreach ($k in $Override.Keys) { $h[$k] = $Override[$k] } [pscustomobject]$h } # A faithful mock of a styled prompt + typed command + output, drawn from the # theme's own hex values. Stands in for the layers a full-screen TUI hides. function Show-PoshPalettePreview { param($Theme, [int] $Left = 40, [int] $Top = 3) $pr = $Theme.psReadLine $line = { param($n,$txt) [Console]::SetCursorPosition($Left, $Top + $n); Write-Host $txt } & $line 0 (Write-Fg $Theme.terminal.scheme.purple ' Preview') & $line 1 '' & $line 2 ((Write-Fg $Theme.terminal.scheme.green ' user') + (Write-Fg $pr.Comment ' in ') + (Write-Fg $Theme.terminal.scheme.blue '~/projects') + (Write-Fg $Theme.terminal.scheme.purple ' ❯')) & $line 3 (' ' + (Write-Fg $pr.Command 'git') + ' ' + (Write-Fg $pr.Parameter 'commit') + ' ' + (Write-Fg $pr.Parameter '-m') + ' ' + (Write-Fg $pr.String '"feat: theme"')) & $line 4 (' ' + (Write-Fg $pr.Variable '$count') + ' ' + (Write-Fg $pr.Operator '=') + ' ' + (Write-Fg $pr.Number '42')) & $line 5 (' ' + (Write-Fg $pr.Comment '# a comment')) & $line 6 (' ' + (Write-Fg $Theme.psStyle.Directory 'Documents/') + ' ' + (Write-Fg $pr.Default 'README.md')) & $line 7 (' ' + (Write-Fg $Theme.psStyle.Error 'Error: something failed')) } # Generic scrollable picker. Items need a .Name; returns the chosen item or $null. function Show-PoshPaletteList { param([string] $Title, [array] $Items, [scriptblock] $PreviewFor) $idx = 0 [Console]::CursorVisible = $false try { while ($true) { Clear-Host Write-Host "" Write-Host " $Title" -ForegroundColor Cyan Write-Host " ↑/↓ move Enter select Esc back" -ForegroundColor DarkGray Write-Host "" for ($i = 0; $i -lt $Items.Count; $i++) { $marker = if ($i -eq $idx) { '❯' } else { ' ' } $color = if ($i -eq $idx) { 'White' } else { 'DarkGray' } Write-Host (" $marker $($Items[$i].Name)") -ForegroundColor $color } if ($PreviewFor) { & $PreviewFor $Items[$idx] } $key = [Console]::ReadKey($true) switch ($key.Key) { 'UpArrow' { $idx = ($idx - 1 + $Items.Count) % $Items.Count } 'DownArrow' { $idx = ($idx + 1) % $Items.Count } 'Enter' { return $Items[$idx] } 'Escape' { return $null } } } } finally { [Console]::CursorVisible = $true } } # --- Simple mode: pick a full preset ------------------------------------------ function Invoke-PoshPaletteSimpleMode { $themes = Get-PoshPaletteThemes $chosen = Show-PoshPaletteList -Title 'Simple mode - pick a theme' -Items $themes -PreviewFor { param($t) Show-PoshPalettePreview -Theme (Resolve-PoshPaletteTheme $t.Data) } if ($chosen) { Clear-Host; Set-PoshPaletteTheme -Theme (Resolve-PoshPaletteTheme $chosen.Data) } } # Adjust a numeric value with the arrow keys. Returns the new value, or $null on Esc. function Invoke-PoshPaletteAdjust { param([string] $Label, [int] $Value, [int] $Min, [int] $Max, [int] $Step, [string] $Suffix = '') [Console]::CursorVisible = $false try { while ($true) { Clear-Host Write-Host "`n $Label" -ForegroundColor Cyan Write-Host " </> adjust Enter confirm Esc cancel`n" -ForegroundColor DarkGray Write-Host (" " + $Value + $Suffix) -ForegroundColor White $key = [Console]::ReadKey($true) switch ($key.Key) { 'LeftArrow' { $Value = [Math]::Max($Min, $Value - $Step) } 'RightArrow' { $Value = [Math]::Min($Max, $Value + $Step) } 'Enter' { return $Value } 'Escape' { return $null } } } } finally { [Console]::CursorVisible = $true } } # --- Detail mode: compose each layer independently ---------------------------- function Invoke-PoshPaletteDetailMode { $presets = Get-PoshPaletteThemes if (-not $presets) { return } $base = $presets[0].Data # Working composition as a mutable hashtable, seeded from the first preset. $comp = @{ name = 'Custom' scheme = $base.scheme palette = $base.palette prompt = $base.prompt font = $base.font fontSize = [int]($base.fontSize ?? 11) opacity = [int]($base.opacity ?? 100) acrylic = [bool]($base.acrylic ?? $false) } [Console]::CursorVisible = $false try { while ($true) { Clear-Host Write-Host "`n Detail mode - compose your look" -ForegroundColor Cyan Write-Host " 1-7 edit A apply Esc back`n" -ForegroundColor DarkGray Write-Host " [1] Scheme : $($comp.scheme)" Write-Host " [2] Shell colors : $($comp.palette)" Write-Host " [3] Prompt : $($comp.prompt)" Write-Host " [4] Font : $($comp.font)" Write-Host " [5] Opacity : $($comp.opacity)%" Write-Host " [6] Acrylic : $(if ($comp.acrylic) { 'on' } else { 'off' })" Write-Host " [7] Font size : $($comp.fontSize)" Write-Host "`n [A] Apply [Esc] Back" -ForegroundColor DarkGray Show-PoshPalettePreview -Theme (Resolve-PoshPaletteTheme (ConvertTo-PPComposition $comp)) $key = [Console]::ReadKey($true) if ($key.Key -eq 'Escape') { return } switch ($key.KeyChar) { '1' { $pf = { param($it) Show-PoshPalettePreview -Theme (Resolve-PoshPaletteTheme (ConvertTo-PPComposition $comp @{ scheme = $it.Id })) }.GetNewClosure() $p = Show-PoshPaletteList -Title 'Color scheme' -Items (Get-PoshPaletteCatalog schemes) -PreviewFor $pf if ($p) { $comp.scheme = $p.Id } } '2' { $pf = { param($it) Show-PoshPalettePreview -Theme (Resolve-PoshPaletteTheme (ConvertTo-PPComposition $comp @{ palette = $it.Id })) }.GetNewClosure() $p = Show-PoshPaletteList -Title 'Shell colors (PSReadLine + output)' -Items (Get-PoshPaletteCatalog palettes) -PreviewFor $pf if ($p) { $comp.palette = $p.Id } } '3' { $pf = { param($it) Show-PoshPalettePreview -Theme (Resolve-PoshPaletteTheme (ConvertTo-PPComposition $comp @{ prompt = $it.Id })) }.GetNewClosure() $p = Show-PoshPaletteList -Title 'Prompt (oh-my-posh)' -Items (Get-PoshPaletteCatalog prompts) -PreviewFor $pf if ($p) { $comp.prompt = $p.Id } } '4' { # Font can't be shown in the ANSI preview; pick from the list. $p = Show-PoshPaletteList -Title 'Font (must be installed)' -Items (Get-PoshPaletteFonts) if ($p) { $comp.font = $p.id } } '5' { $v = Invoke-PoshPaletteAdjust 'Opacity' ([int]$comp.opacity) 30 100 5 '%' if ($null -ne $v) { $comp.opacity = $v } } '6' { $comp.acrylic = -not [bool]$comp.acrylic } '7' { $v = Invoke-PoshPaletteAdjust 'Font size' ([int]$comp.fontSize) 8 24 1 if ($null -ne $v) { $comp.fontSize = $v } } { $_ -in 'a', 'A' } { Clear-Host Set-PoshPaletteTheme -Theme (Resolve-PoshPaletteTheme (ConvertTo-PPComposition $comp)) return } } } } finally { [Console]::CursorVisible = $true } } # --- Entry point -------------------------------------------------------------- function Start-PoshPalette { [CmdletBinding()] param() while ($true) { Clear-Host Write-Host "" Write-Host " ██ Posh Palette" -ForegroundColor Magenta Write-Host " Style your PowerShell + Windows Terminal across all 4 layers.`n" -ForegroundColor DarkGray Write-Host " [1] Simple mode - scroll a list of full themes, pick one" Write-Host " [2] Detail mode - compose each layer (scheme / colors / prompt / font)" Write-Host " [3] Doctor - check your setup (fonts, oh-my-posh, terminal)" Write-Host " [Q] Quit`n" $key = [Console]::ReadKey($true) switch ($key.KeyChar) { '1' { Invoke-PoshPaletteSimpleMode } '2' { Invoke-PoshPaletteDetailMode } '3' { Clear-Host; Test-PoshPaletteSetup | Out-Null; Write-Host " Press any key to return..." -ForegroundColor DarkGray; [Console]::ReadKey($true) | Out-Null } { $_ -in 'q', 'Q' } { return } } } } |