162 add colors configurationaccessibilitycolorblindness palette in config

README.md

@@ -125,6 +125,25 @@ Automatic refresh is always enabled. It pauses when an error occurs to avoid rep
 
 The log level uses Go's `slog` [log levels](https://pkg.go.dev/log/slog#hdr-Levels), e.g: `info`, `debug`, `warn`, `error`.
 
+### Themes
+
+**o7k** supports customizable YAML-based color themes (skins). Built-in skins are available under `internal/config/skins/`
+and users can create their own.
+
+Four accessibility-oriented themes are included: **High Contrast**, **Protanopia**, **Deuteranopia**, and **Tritanopia**.
+
+To select a theme, set the `skin` property in `~/.config/o7k/config.yaml`:
+
+```yaml
+skin: dracula
+```
+
+Custom skins can be placed in `~/.config/o7k/skins/` and selected by their filename without the `.yaml` extension:
+
+```yaml
+skin: my-custom-theme
+```
+
 ## Usage
 
 **o7k** uses the standard OpenStack `clouds.yaml` configuration and automatically discovers the 

internal/config/config.go

@@ -15,9 +15,11 @@ const (
 )
 
 type Config struct {
-	Cache   Cache   `yaml:"cache"`
-	Log     Log     `yaml:"log"`
-	Refresh Refresh `yaml:"refresh"`
+	Cache      Cache   `yaml:"cache"`
+	Log        Log     `yaml:"log"`
+	Refresh    Refresh `yaml:"refresh"`
+	Skin       string  `yaml:"skin"`
+	SkinColors Skin    `yaml:"-"`
 }
 
 type Cache struct {
@@ -68,13 +70,15 @@ func Load() (Config, error) {
 		return cfg, err
 	}
 
-	path := filepath.Join(dir, "o7k", "config.yaml")
+	dir = filepath.Join(dir, "o7k")
+	path := filepath.Join(dir, "config.yaml")
 
 	data, err := os.ReadFile(path)
-	if os.IsNotExist(err) {
-		return cfg, nil
-	}
-	if err != nil {
+	if err == nil {
+		if err := yaml.Unmarshal(data, &cfg); err != nil {
+			return cfg, err
+		}
+	} else if !os.IsNotExist(err) {
 		return cfg, fmt.Errorf("reading config: %w", err)
 	}
 
@@ -96,5 +100,17 @@ func Load() (Config, error) {
 		cfg.Refresh.Interval = defaultRefreshInterval
 	}
 
+	if cfg.Skin == "" {
+		cfg.Skin = "default"
+	}
+
+	if err := installSkins(dir); err != nil {
+		return cfg, err
+	}
+	cfg.SkinColors, err = loadSkin(dir, cfg.Skin)
+	if err != nil {
+		return cfg, err
+	}
+
 	return cfg, nil
 }

internal/config/skin.go

@@ -0,0 +1,42 @@
+package config
+
+type ColorPair struct {
+	Foreground string `yaml:"foreground"`
+	Background string `yaml:"background"`
+}
+
+type Skin struct {
+	Main    ColorPair `yaml:"main"`
+	Table   ColorPair `yaml:"table"`
+	Context ColorPair `yaml:"context"`
+	Command ColorPair `yaml:"command"`
+
+	ResourceTag   ColorPair `yaml:"resource_tag"`
+	NavigationTag ColorPair `yaml:"navigation_tag"`
+	Status        ColorPair `yaml:"status"`
+	Loading       ColorPair `yaml:"loading"`
+	Info          ColorPair `yaml:"info"`
+	StateOn       ColorPair `yaml:"state_on"`
+	StateOff      ColorPair `yaml:"state_off"`
+	ModalButton   ColorPair `yaml:"modal_button"`
+	TableSelected ColorPair `yaml:"table_selected"`
+
+	CommandGhost       string `yaml:"command_ghost"`
+	CommandPlaceholder string `yaml:"command_placeholder"`
+
+	HeaderLabel       string `yaml:"header_label"`
+	HeaderValue       string `yaml:"header_value"`
+	HeaderCommandKey  string `yaml:"header_command_key"`
+	HeaderCommandText string `yaml:"header_command_text"`
+	Logo              string `yaml:"logo"`
+
+	JSONKey    string `yaml:"json_key"`
+	JSONString string `yaml:"json_string"`
+	JSONNumber string `yaml:"json_number"`
+	JSONBool   string `yaml:"json_bool"`
+	JSONNull   string `yaml:"json_null"`
+
+	TableTitle  string `yaml:"table_title"`
+	TableHeader string `yaml:"table_header"`
+	ErrorTitle  string `yaml:"error_title"`
+}

internal/config/skin_helpers.go

@@ -0,0 +1,82 @@
+package config
+
+import (
+	"embed"
+	"fmt"
+	"io/fs"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"gopkg.in/yaml.v3"
+)
+
+//go:embed skins/*.yaml
+var embeddedSkins embed.FS
+
+func installSkins(configDir string) error {
+	skinsDir := filepath.Join(configDir, "skins")
+
+	if err := os.MkdirAll(skinsDir, 0755); err != nil {
+		return fmt.Errorf("creating skins directory: %w", err)
+	}
+
+	files, err := fs.Glob(embeddedSkins, "skins/*.yaml")
+	if err != nil {
+		return fmt.Errorf("listing embedded skins: %w", err)
+	}
+
+	for _, file := range files {
+		data, err := embeddedSkins.ReadFile(file)
+		if err != nil {
+			return fmt.Errorf("reading embedded skin %s: %w", file, err)
+		}
+
+		path := filepath.Join(skinsDir, filepath.Base(file))
+
+		f, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0644)
+		if os.IsExist(err) {
+			continue
+		}
+		if err != nil {
+			return fmt.Errorf("creating skin %s: %w", path, err)
+		}
+
+		_, writeErr := f.Write(data)
+		closeErr := f.Close()
+
+		if writeErr != nil {
+			return fmt.Errorf("writing skin %s: %w", path, writeErr)
+		}
+		if closeErr != nil {
+			return fmt.Errorf("closing skin %s: %w", path, closeErr)
+		}
+	}
+
+	return nil
+}
+
+func loadSkin(configDir, name string) (Skin, error) {
+	var skin Skin
+
+	if name == "" || name != filepath.Base(name) ||
+		strings.ContainsAny(name, `/\`) || name == "." || name == ".." {
+		return skin, fmt.Errorf("invalid skin name %q", name)
+	}
+
+	path := filepath.Join(configDir, "skins", name+".yaml")
+
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return skin, fmt.Errorf("reading skin %q: %w", name, err)
+	}
+
+	decoder := yaml.NewDecoder(strings.NewReader(string(data)))
+	decoder.KnownFields(true)
+
+	if err := decoder.Decode(&skin); err != nil {
+		return skin, fmt.Errorf("parsing skin %q: %w", name, err)
+	}
+
+	return skin, nil
+}

internal/config/skins/default.yaml

@@ -0,0 +1,54 @@
+main:
+  foreground: "#FFFFFF"
+  background: ""
+table:
+  foreground: "#FFFFFF"
+  background: ""
+table_selected:
+  foreground: "255"
+  background: "#ED1944"
+table_header: "#FFFFFF"
+context:
+  foreground: "#FFFFFF"
+  background: ""
+command:
+  foreground: "#87CEFA"
+  background: ""
+resource_tag:
+  foreground: "255"
+  background: "#ED1944"
+navigation_tag:
+  foreground: "0"
+  background: "255"
+status:
+  foreground: "#000000"
+  background: "#FFA500"
+loading:
+  foreground: "#000000"
+  background: "#ff8c00"
+info:
+  foreground: "#000000"
+  background: "#00BFFF"
+state_on:
+  foreground: "#000000"
+  background: "#008000"
+state_off:
+  foreground: "#000000"
+  background: "#FF0000"
+modal_button:
+  foreground: "#000000"
+  background: "#00BFFF"
+command_ghost: "#5C6370"
+command_placeholder: "#666666"
+header_label: "#FFA500"
+header_value: "#FFFFFF"
+header_command_key: "#00BFFF"
+header_command_text: "#FFFFFF"
+logo: "#FFA500"
+json_key: "#87CEFA"
+json_string: "#98C379"
+json_number: "#E5C07B"
+json_bool: "#C678DD"
+json_null: "#7F848E"
+table_title: "#FFFFFF"
+error_title: "#ED1944"

internal/config/skins/deuteranopia.yaml

@@ -0,0 +1,54 @@
+main:
+  foreground: "#F0F3F7"
+  background: "#151923"
+table:
+  foreground: "#F0F3F7"
+  background: "#151923"
+context:
+  foreground: "#F0F3F7"
+  background: "#151923"
+command:
+  foreground: "#82BFFF"
+  background: "#151923"
+resource_tag:
+  foreground: "#151923"
+  background: "#FFB347"
+navigation_tag:
+  foreground: "#151923"
+  background: "#82BFFF"
+status:
+  foreground: "#151923"
+  background: "#FFD166"
+loading:
+  foreground: "#151923"
+  background: "#FFB347"
+info:
+  foreground: "#151923"
+  background: "#82BFFF"
+state_on:
+  foreground: "#151923"
+  background: "#82BFFF"
+state_off:
+  foreground: "#151923"
+  background: "#FFB347"
+modal_button:
+  foreground: "#151923"
+  background: "#82BFFF"
+table_selected:
+  foreground: "#151923"
+  background: "#FFD166"
+table_header: "#FFFFFF"
+command_ghost: "#A0A8B8"
+command_placeholder: "#A0A8B8"
+header_label: "#FFD166"
+header_value: "#FFFFFF"
+header_command_key: "#82BFFF"
+header_command_text: "#F0F3F7"
+logo: "#FFD166"
+json_key: "#82BFFF"
+json_string: "#FFD166"
+json_number: "#FFFFFF"
+json_bool: "#D5A6FF"
+json_null: "#A0A8B8"
+table_title: "#FFFFFF"
+error_title: "#FFB347"

internal/config/skins/dracula.yaml

@@ -0,0 +1,54 @@
+main:
+  foreground: "#F8F8F2"
+  background: "#282A36"
+table:
+  foreground: "#F8F8F2"
+  background: "#282A36"
+context:
+  foreground: "#F8F8F2"
+  background: "#282A36"
+command:
+  foreground: "#8BE9FD"
+  background: "#282A36"
+resource_tag:
+  foreground: "#282A36"
+  background: "#FF79C6"
+navigation_tag:
+  foreground: "#282A36"
+  background: "#BD93F9"
+status:
+  foreground: "#282A36"
+  background: "#FFB86C"
+loading:
+  foreground: "#282A36"
+  background: "#F1FA8C"
+info:
+  foreground: "#282A36"
+  background: "#8BE9FD"
+state_on:
+  foreground: "#282A36"
+  background: "#50FA7B"
+state_off:
+  foreground: "#282A36"
+  background: "#FF5555"
+modal_button:
+  foreground: "#282A36"
+  background: "#BD93F9"
+table_selected:
+  foreground: "#282A36"
+  background: "#BD93F9"
+table_header: "#F8F8F2"
+command_ghost: "#6272A4"
+command_placeholder: "#6272A4"
+header_label: "#FFB86C"
+header_value: "#F8F8F2"
+header_command_key: "#8BE9FD"
+header_command_text: "#F8F8F2"
+logo: "#BD93F9"
+json_key: "#8BE9FD"
+json_string: "#F1FA8C"
+json_number: "#BD93F9"
+json_bool: "#FF79C6"
+json_null: "#6272A4"
+table_title: "#F8F8F2"
+error_title: "#FF5555"