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config.go
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config.go
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package peco
import (
"encoding/json"
"fmt"
"os"
"os/user"
"path/filepath"
"strings"
"github.com/nsf/termbox-go"
)
var currentUser = user.Current
type Config struct {
Keymap Keymap `json:"Keymap"`
Matcher string `json:"Matcher"`
Style StyleSet `json:"Style"`
CustomMatcher map[string][]string
}
func NewConfig() *Config {
return &Config{
Keymap: NewKeymap(),
Matcher: IgnoreCaseMatch,
Style: NewStyleSet(),
}
}
func (c *Config) ReadFilename(filename string) error {
f, err := os.Open(filename)
if err != nil {
return err
}
defer f.Close()
err = json.NewDecoder(f).Decode(c)
if err != nil {
return err
}
return nil
}
var (
stringToFg = map[string]termbox.Attribute{
"default": termbox.ColorDefault,
"black": termbox.ColorBlack,
"red": termbox.ColorRed,
"green": termbox.ColorGreen,
"yellow": termbox.ColorYellow,
"blue": termbox.ColorBlue,
"magenta": termbox.ColorMagenta,
"cyan": termbox.ColorCyan,
"white": termbox.ColorWhite,
}
stringToBg = map[string]termbox.Attribute{
"on_default": termbox.ColorDefault,
"on_black": termbox.ColorBlack,
"on_red": termbox.ColorRed,
"on_green": termbox.ColorGreen,
"on_yellow": termbox.ColorYellow,
"on_blue": termbox.ColorBlue,
"on_magenta": termbox.ColorMagenta,
"on_cyan": termbox.ColorCyan,
"on_white": termbox.ColorWhite,
}
stringToAttr = map[string]termbox.Attribute{
"bold": termbox.AttrBold,
"underline": termbox.AttrUnderline,
"blink": termbox.AttrReverse,
}
)
type StyleSet struct {
Basic Style `json:"Basic"`
SavedSelection Style `json:"SavedSelection"`
Selected Style `json:"Selected"`
Query Style `json:"Query"`
}
func NewStyleSet() StyleSet {
return StyleSet{
Basic: Style{fg: termbox.ColorDefault, bg: termbox.ColorDefault},
SavedSelection: Style{fg: termbox.ColorBlack | termbox.AttrBold, bg: termbox.ColorCyan},
Selected: Style{fg: termbox.ColorDefault | termbox.AttrUnderline, bg: termbox.ColorMagenta},
Query: Style{fg: termbox.ColorCyan, bg: termbox.ColorDefault},
}
}
type Style struct {
fg termbox.Attribute
bg termbox.Attribute
}
func (s *Style) UnmarshalJSON(buf []byte) error {
raw := []string{}
if err := json.Unmarshal(buf, &raw); err != nil {
return err
}
*s = *stringsToStyle(raw)
return nil
}
func stringsToStyle(raw []string) *Style {
style := &Style{
fg: termbox.ColorDefault,
bg: termbox.ColorDefault,
}
for _, s := range raw {
fg, ok := stringToFg[s]
if ok {
style.fg = fg
}
bg, ok := stringToBg[s]
if ok {
style.bg = bg
}
}
for _, s := range raw {
attr, ok := stringToAttr[s]
if ok {
style.fg |= attr
}
}
return style
}
var _locateRcfileIn = locateRcfileIn
func locateRcfileIn(dir string) (string, error) {
const basename = "config.json"
file := filepath.Join(dir, basename)
if _, err := os.Stat(file); err != nil {
return "", err
}
return file, nil
}
func LocateRcfile() (string, error) {
// http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
//
// Try in this order:
// $XDG_CONFIG_HOME/peco/config.json
// $XDG_CONFIG_DIR/peco/config.json (where XDG_CONFIG_DIR is listed in $XDG_CONFIG_DIRS)
// ~/.peco/config.json
user, uErr := currentUser()
// Try dir supplied via env var
if dir := os.Getenv("XDG_CONFIG_HOME"); dir != "" {
file, err := _locateRcfileIn(filepath.Join(dir, "peco"))
if err == nil {
return file, nil
}
} else if uErr == nil { // silently ignore failure for user.Current()
// Try "default" XDG location, is user is available
file, err := _locateRcfileIn(filepath.Join(user.HomeDir, ".config", "peco"))
if err == nil {
return file, nil
}
}
// this standard does not take into consideration windows (duh)
// while the spec says use ":" as the separator, Go provides us
// with filepath.ListSeparator, so use it
if dirs := os.Getenv("XDG_CONFIG_DIRS"); dirs != "" {
for _, dir := range strings.Split(dirs, fmt.Sprintf("%c", filepath.ListSeparator)) {
file, err := _locateRcfileIn(filepath.Join(dir, "peco"))
if err == nil {
return file, nil
}
}
}
if uErr == nil { // silently ignore failure for user.Current()
file, err := _locateRcfileIn(filepath.Join(user.HomeDir, ".peco"))
if err == nil {
return file, nil
}
}
return "", fmt.Errorf("Config file not found")
}