105 lines
1.9 KiB
Go
105 lines
1.9 KiB
Go
package fontinfo
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import (
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"io/fs"
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"os"
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"os/user"
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"path/filepath"
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"strings"
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)
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// Font represents a font file on disk
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type Font struct {
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Family string
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Style string
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Path string
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}
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var validExtensions = []string{
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".ttf",
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".otf",
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}
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var fontDirs = []string{
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"~/.fonts",
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"~/.local/share/fonts",
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"/usr/local/share/fonts",
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"/usr/share/fonts",
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filepath.Join(os.Getenv("XDG_DATA_HOME"), "fonts"),
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}
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func init() {
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dataDirs := strings.Split(os.Getenv("XDG_DATA_DIRS"), string(os.PathListSeparator))
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for _, dir := range dataDirs {
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if dir == "" {
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continue
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}
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fontDirs = append(fontDirs, filepath.Join(dir, "fonts"))
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}
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}
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// Match finds all fonts installed on the system which match the provided matchers
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func Match(matchers ...matcher) ([]Font, error) {
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var fonts []Font
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meta := make(map[string]*fontMetadata)
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var home string
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if usr, _ := user.Current(); usr != nil {
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home = usr.HomeDir
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}
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for _, dir := range fontDirs {
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if home != "" && strings.HasPrefix(dir, "~/") {
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dir = filepath.Join(home, dir[2:])
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}
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if info, err := os.Stat(dir); os.IsNotExist(err) {
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continue
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} else if !info.IsDir() {
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continue
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}
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if err := filepath.WalkDir(dir, func(path string, info fs.DirEntry, err error) error {
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if _, ok := meta[path]; ok {
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return nil
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}
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ext := filepath.Ext(path)
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for _, valid := range validExtensions {
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if strings.EqualFold(ext, valid) {
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f, err := os.Open(path)
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if err != nil {
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return err
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}
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defer f.Close()
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metadata, err := readMetadata(f)
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if err != nil {
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continue
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}
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for _, match := range matchers {
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if !match(metadata) {
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return nil
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}
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}
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meta[path] = metadata
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return nil
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}
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}
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return nil
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}); err != nil {
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return nil, err
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}
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}
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for path, metadata := range meta {
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fonts = append(fonts, Font{
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Family: metadata.FontFamily,
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Style: metadata.FontStyle,
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Path: path,
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})
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}
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return fonts, nil
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}
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