Bjarne Øverli
131 lines
4.3 KiB
Go
131 lines
4.3 KiB
Go
package ui
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import (
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"image/color"
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"math"
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"strconv"
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"strings"
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"charm.land/lipgloss/v2"
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"github.com/bjarneo/cliamp/theme"
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)
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// CLIAMP color palette using standard ANSI terminal colors (0-15).
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// These adapt to the user's terminal theme for consistent appearance.
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var (
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ColorBackground color.Color
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ColorTitle color.Color = lipgloss.ANSIColor(10) // bright green
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ColorText color.Color = lipgloss.ANSIColor(15) // bright white
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ColorDim color.Color = lipgloss.ANSIColor(7) // white (light gray)
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ColorAccent color.Color = lipgloss.ANSIColor(11) // bright yellow
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ColorPlaying color.Color = lipgloss.ANSIColor(10) // bright green
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ColorSeekBar color.Color = lipgloss.ANSIColor(11) // bright yellow
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ColorVolume color.Color = lipgloss.ANSIColor(2) // green
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ColorError color.Color = lipgloss.ANSIColor(9) // bright red
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ColorWarning color.Color = lipgloss.ANSIColor(11) // bright yellow
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ColorKeyBG color.Color = lipgloss.ANSIColor(8) // bright black (dark gray)
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ColorKeyFG color.Color = lipgloss.ANSIColor(15) // bright white
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// Spectrum gradient: green -> yellow -> red
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SpectrumLow color.Color = lipgloss.ANSIColor(10) // bright green
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SpectrumMid color.Color = lipgloss.ANSIColor(11) // bright yellow
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SpectrumHigh color.Color = lipgloss.ANSIColor(9) // bright red
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)
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// PaddingH is the horizontal padding inside the frame.
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var PaddingH = 3
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// paddingV is the vertical padding inside the frame.
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var paddingV = 1
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// PanelWidth is the usable inner width of the frame.
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// Updated dynamically in WindowSizeMsg based on terminal width.
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var PanelWidth = 80 - 2*PaddingH
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// SetPadding updates the frame padding and derived styles.
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func SetPadding(h, v int) {
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PaddingH = h
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paddingV = v
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PanelWidth = 80 - 2*PaddingH
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FrameStyle = FrameStyle.Padding(paddingV, PaddingH)
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}
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// VerticalPadding returns the current frame padding above and below content.
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func VerticalPadding() int {
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return paddingV
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}
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// FrameStyle is the outer frame style for the TUI.
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var FrameStyle = lipgloss.NewStyle().
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Padding(paddingV, PaddingH).
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Width(80)
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// ApplyThemeColors updates all color variables and rebuilds spectrum styles.
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// If the theme is the default (empty hex values), ANSI fallback colors are restored.
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func ApplyThemeColors(t theme.Theme) {
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if t.IsDefault() {
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ColorBackground = nil
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ColorTitle = lipgloss.ANSIColor(10)
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ColorText = lipgloss.ANSIColor(15)
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ColorDim = lipgloss.ANSIColor(7)
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ColorAccent = lipgloss.ANSIColor(11)
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ColorPlaying = lipgloss.ANSIColor(10)
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ColorSeekBar = lipgloss.ANSIColor(11)
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ColorVolume = lipgloss.ANSIColor(2)
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ColorError = lipgloss.ANSIColor(9)
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ColorWarning = lipgloss.ANSIColor(11)
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ColorKeyBG = lipgloss.ANSIColor(8)
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ColorKeyFG = lipgloss.ANSIColor(15)
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SpectrumLow = lipgloss.ANSIColor(10)
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SpectrumMid = lipgloss.ANSIColor(11)
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SpectrumHigh = lipgloss.ANSIColor(9)
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} else {
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if t.BG == "" {
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ColorBackground = nil
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} else {
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ColorBackground = lipgloss.Color(t.BG)
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}
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ColorTitle = lipgloss.Color(t.Accent)
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ColorText = lipgloss.Color(t.BrightFG)
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ColorDim = lipgloss.Color(t.FG)
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ColorAccent = lipgloss.Color(t.Accent)
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ColorPlaying = lipgloss.Color(t.Green)
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ColorSeekBar = lipgloss.Color(t.Accent)
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ColorVolume = lipgloss.Color(t.Green)
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ColorError = lipgloss.Color(t.Red)
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ColorWarning = lipgloss.Color(t.Yellow)
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ColorKeyBG = lipgloss.Color(t.Accent)
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ColorKeyFG = lipgloss.Color(contrastingTextColor(t.Accent))
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SpectrumLow = lipgloss.Color(t.Green)
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SpectrumMid = lipgloss.Color(t.Yellow)
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SpectrumHigh = lipgloss.Color(t.Red)
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}
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// Rebuild visualizer spectrum styles.
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specLowStyle = lipgloss.NewStyle().Foreground(SpectrumLow)
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specMidStyle = lipgloss.NewStyle().Foreground(SpectrumMid)
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specHighStyle = lipgloss.NewStyle().Foreground(SpectrumHigh)
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refreshSpecANSI()
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}
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func contrastingTextColor(hex string) string {
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value, err := strconv.ParseUint(strings.TrimPrefix(hex, "#"), 16, 24)
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if err != nil {
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return "#ffffff"
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}
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linear := func(channel uint64) float64 {
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component := float64(channel) / 255
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if component <= 0.04045 {
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return component / 12.92
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}
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return math.Pow((component+0.055)/1.055, 2.4)
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}
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luminance := 0.2126*linear(value>>16) + 0.7152*linear((value>>8)&0xff) + 0.0722*linear(value&0xff)
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// This is the crossover where black provides more contrast than white.
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if luminance > 0.179 {
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return "#000000"
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}
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return "#ffffff"
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}
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