mirror of
https://github.com/makew0rld/amfora.git
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134 lines
4.6 KiB
Go
134 lines
4.6 KiB
Go
package config
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import (
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"fmt"
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"sync"
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"github.com/gdamore/tcell/v2"
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)
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// Functions to allow themeing configuration.
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// UI element colors are mapped to a string key, such as "error" or "tab_bg"
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// These are the same keys used in the config file.
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var themeMu = sync.RWMutex{}
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var theme = map[string]tcell.Color{
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// Default values below
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"bg": tcell.ColorBlack, // Used for cview.Styles.PrimitiveBackgroundColor
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"tab_num": tcell.Color30, // xterm:Turquoise4, #008787
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"tab_divider": tcell.ColorWhite,
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"bottombar_label": tcell.Color30,
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"bottombar_text": tcell.ColorBlack,
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"bottombar_bg": tcell.ColorWhite,
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"scrollbar": tcell.ColorWhite,
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// Modals
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"btn_bg": tcell.ColorNavy, // All modal buttons
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"btn_text": tcell.ColorWhite,
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"dl_choice_modal_bg": tcell.ColorPurple,
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"dl_choice_modal_text": tcell.ColorWhite,
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"dl_modal_bg": tcell.Color130, // xterm:DarkOrange3, #af5f00
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"dl_modal_text": tcell.ColorWhite,
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"info_modal_bg": tcell.ColorGray,
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"info_modal_text": tcell.ColorWhite,
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"error_modal_bg": tcell.ColorMaroon,
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"error_modal_text": tcell.ColorWhite,
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"yesno_modal_bg": tcell.ColorPurple,
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"yesno_modal_text": tcell.ColorWhite,
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"tofu_modal_bg": tcell.ColorMaroon,
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"tofu_modal_text": tcell.ColorWhite,
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"subscription_modal_bg": tcell.Color61, // xterm:SlateBlue3, #5f5faf
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"subscription_modal_text": tcell.ColorWhite,
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"input_modal_bg": tcell.ColorGreen,
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"input_modal_text": tcell.ColorWhite,
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"input_modal_field_bg": tcell.ColorBlue,
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"input_modal_field_text": tcell.ColorWhite,
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"bkmk_modal_bg": tcell.ColorTeal,
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"bkmk_modal_text": tcell.ColorWhite,
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"bkmk_modal_label": tcell.ColorYellow,
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"bkmk_modal_field_bg": tcell.ColorBlue,
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"bkmk_modal_field_text": tcell.ColorWhite,
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"hdg_1": tcell.ColorRed,
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"hdg_2": tcell.ColorLime,
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"hdg_3": tcell.ColorFuchsia,
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"amfora_link": tcell.Color33, // xterm:DodgerBlue1, #0087ff
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"foreign_link": tcell.Color92, // xterm:DarkViolet, #8700d7
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"link_number": tcell.ColorSilver,
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"regular_text": tcell.ColorWhite,
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"quote_text": tcell.ColorWhite,
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"preformatted_text": tcell.Color229, // xterm:Wheat1, #ffffaf
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"list_text": tcell.ColorWhite,
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}
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func SetColor(key string, color tcell.Color) {
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themeMu.Lock()
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theme[key] = color
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themeMu.Unlock()
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}
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// GetColor will return tcell.ColorBlack if there is no color for the provided key.
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func GetColor(key string) tcell.Color {
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themeMu.RLock()
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defer themeMu.RUnlock()
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return theme[key].TrueColor()
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}
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// GetColorString returns a string that can be used in a cview color tag,
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// for the given theme key.
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// It will return "#000000" if there is no color for the provided key.
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func GetColorString(key string) string {
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themeMu.RLock()
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defer themeMu.RUnlock()
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color := theme[key].TrueColor()
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if color == tcell.ColorDefault {
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return "-"
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}
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return fmt.Sprintf("#%06x", color.Hex())
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}
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// GetContrastingColor returns ColorBlack if color is brighter than gray
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// otherwise returns ColorWhite if color is dimmer than gray
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// if color is ColorDefault (undefined luminance) this returns ColorDefault
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func GetContrastingColor(color tcell.Color) tcell.Color {
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if color == tcell.ColorDefault {
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// color should never be tcell.ColorDefault
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// only config keys which end in bg are allowed to be set to default
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// and the only way the argument of this function is set to ColorDefault
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// is if both the text and bg of an element in the UI are set to default
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return tcell.ColorDefault
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}
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r, g, b := color.RGB()
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luminance := (77*r + 150*g + 29*b + 1<<7) >> 8
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const gray = 119 // The middle gray
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if luminance > gray {
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return tcell.ColorBlack
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}
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return tcell.ColorWhite
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}
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// GetTextColor is the Same as GetColor, unless the key is "default".
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// This happens on focus of a UI element which has a bg of default, in which case
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// It return tcell.ColorBlack or tcell.ColorWhite, depending on which is more readable
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func GetTextColor(key, bg string) tcell.Color {
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themeMu.RLock()
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defer themeMu.RUnlock()
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color := theme[key].TrueColor()
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if color != tcell.ColorDefault {
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return color
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}
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return GetContrastingColor(theme[bg].TrueColor())
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}
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// GetTextColorString is the Same as GetColorString, unless the key is "default".
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// This happens on focus of a UI element which has a bg of default, in which case
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// It return tcell.ColorBlack or tcell.ColorWhite, depending on which is more readable
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func GetTextColorString(key, bg string) string {
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color := GetTextColor(key, bg)
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return fmt.Sprintf("#%06x", color.Hex())
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}
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